From 0adf96dcdb6ba38e789d409ca1bf1fc149e60808 Mon Sep 17 00:00:00 2001 From: jason Date: Mon, 29 Dec 2025 01:49:58 +0000 Subject: [PATCH] flip image when image is dropped into the folder --- CMakeLists.txt | 192 + LICENSE | 22 + compile_flags.txt | 16 + efswConfig.cmake.in | 10 + include/efsw/efsw.h | 197 + include/efsw/efsw.hpp | 267 + premake4.lua | 261 + premake5.lua | 273 + project/build.reldbginfo.sh | 9 + project/qtcreator-linux/efsw.cflags | 1 + project/qtcreator-linux/efsw.config | 1 + project/qtcreator-linux/efsw.creator | 1 + project/qtcreator-linux/efsw.creator.user | 344 + project/qtcreator-linux/efsw.cxxflags | 1 + project/qtcreator-linux/efsw.files | 118 + project/qtcreator-linux/efsw.includes | 2 + project/qtcreator-osx/efsw.cflags | 1 + project/qtcreator-osx/efsw.config | 3 + project/qtcreator-osx/efsw.creator | 1 + project/qtcreator-osx/efsw.creator.user | 253 + project/qtcreator-osx/efsw.cxxflags | 1 + project/qtcreator-osx/efsw.files | 185 + project/qtcreator-osx/efsw.includes | 7 + project/qtcreator-win/efsw.cflags | 1 + project/qtcreator-win/efsw.config | 1 + project/qtcreator-win/efsw.creator | 1 + project/qtcreator-win/efsw.creator.user | 211 + project/qtcreator-win/efsw.cxxflags | 1 + project/qtcreator-win/efsw.files | 215 + project/qtcreator-win/efsw.includes | 2 + src/efsw/Atomic.hpp | 33 + src/efsw/Debug.cpp | 81 + src/efsw/Debug.hpp | 62 + src/efsw/DirWatcherGeneric.cpp | 388 + src/efsw/DirWatcherGeneric.hpp | 57 + src/efsw/DirectorySnapshot.cpp | 212 + src/efsw/DirectorySnapshot.hpp | 45 + src/efsw/DirectorySnapshotDiff.cpp | 22 + src/efsw/DirectorySnapshotDiff.hpp | 35 + src/efsw/FileInfo.cpp | 240 + src/efsw/FileInfo.hpp | 64 + src/efsw/FileSystem.cpp | 161 + src/efsw/FileSystem.hpp | 43 + src/efsw/FileWatcher.cpp | 120 + src/efsw/FileWatcherCWrapper.cpp | 141 + src/efsw/FileWatcherFSEvents.cpp | 248 + src/efsw/FileWatcherFSEvents.hpp | 80 + src/efsw/FileWatcherGeneric.cpp | 158 + src/efsw/FileWatcherGeneric.hpp | 61 + src/efsw/FileWatcherImpl.cpp | 34 + src/efsw/FileWatcherImpl.hpp | 64 + src/efsw/FileWatcherInotify.cpp | 612 ++ src/efsw/FileWatcherInotify.hpp | 87 + src/efsw/FileWatcherKqueue.cpp | 229 + src/efsw/FileWatcherKqueue.hpp | 81 + src/efsw/FileWatcherWin32.cpp | 267 + src/efsw/FileWatcherWin32.hpp | 71 + src/efsw/Lock.hpp | 11 + src/efsw/Log.cpp | 49 + src/efsw/Mutex.hpp | 10 + src/efsw/String.cpp | 669 ++ src/efsw/String.hpp | 630 ++ src/efsw/System.cpp | 22 + src/efsw/System.hpp | 25 + src/efsw/Thread.hpp | 49 + src/efsw/Utf.hpp | 721 ++ src/efsw/Utf.inl | 576 ++ src/efsw/Watcher.cpp | 10 + src/efsw/Watcher.hpp | 29 + src/efsw/WatcherFSEvents.cpp | 223 + src/efsw/WatcherFSEvents.hpp | 89 + src/efsw/WatcherGeneric.cpp | 33 + src/efsw/WatcherGeneric.hpp | 29 + src/efsw/WatcherInotify.cpp | 21 + src/efsw/WatcherInotify.hpp | 24 + src/efsw/WatcherKqueue.cpp | 566 ++ src/efsw/WatcherKqueue.hpp | 97 + src/efsw/WatcherWin32.cpp | 268 + src/efsw/WatcherWin32.hpp | 79 + src/efsw/base.hpp | 129 + src/efsw/inotify-nosys.h | 164 + src/efsw/platform/platformimpl.hpp | 16 + src/efsw/platform/posix/FileSystemImpl.cpp | 251 + src/efsw/platform/posix/FileSystemImpl.hpp | 30 + src/efsw/platform/posix/SystemImpl.cpp | 168 + src/efsw/platform/posix/SystemImpl.hpp | 25 + src/efsw/platform/win/FileSystemImpl.cpp | 111 + src/efsw/platform/win/FileSystemImpl.hpp | 31 + src/efsw/platform/win/SystemImpl.cpp | 46 + src/efsw/platform/win/SystemImpl.hpp | 25 + src/efsw/sophist.h | 147 + src/joomer-efsw-file-monitoring.cpp | 222 + src/stb_image.h | 7988 ++++++++++++++++++++ src/stb_image_write.h | 1724 +++++ src/test/efsw-test.c | 164 + src/test/efsw-test.cpp | 139 + 96 files changed, 21904 insertions(+) create mode 100644 CMakeLists.txt create mode 100644 LICENSE create mode 100644 compile_flags.txt create mode 100644 efswConfig.cmake.in create mode 100644 include/efsw/efsw.h create mode 100644 include/efsw/efsw.hpp create mode 100644 premake4.lua create mode 100644 premake5.lua create mode 100644 project/build.reldbginfo.sh create mode 100644 project/qtcreator-linux/efsw.cflags create mode 100644 project/qtcreator-linux/efsw.config create mode 100644 project/qtcreator-linux/efsw.creator create mode 100644 project/qtcreator-linux/efsw.creator.user create mode 100644 project/qtcreator-linux/efsw.cxxflags create mode 100644 project/qtcreator-linux/efsw.files create mode 100644 project/qtcreator-linux/efsw.includes create mode 100644 project/qtcreator-osx/efsw.cflags create mode 100644 project/qtcreator-osx/efsw.config create mode 100644 project/qtcreator-osx/efsw.creator create mode 100644 project/qtcreator-osx/efsw.creator.user create mode 100644 project/qtcreator-osx/efsw.cxxflags create mode 100644 project/qtcreator-osx/efsw.files create mode 100644 project/qtcreator-osx/efsw.includes create mode 100644 project/qtcreator-win/efsw.cflags create mode 100644 project/qtcreator-win/efsw.config create mode 100644 project/qtcreator-win/efsw.creator create mode 100644 project/qtcreator-win/efsw.creator.user create mode 100644 project/qtcreator-win/efsw.cxxflags create mode 100644 project/qtcreator-win/efsw.files create mode 100644 project/qtcreator-win/efsw.includes create mode 100644 src/efsw/Atomic.hpp create mode 100644 src/efsw/Debug.cpp create mode 100644 src/efsw/Debug.hpp create mode 100644 src/efsw/DirWatcherGeneric.cpp create mode 100644 src/efsw/DirWatcherGeneric.hpp create mode 100644 src/efsw/DirectorySnapshot.cpp create mode 100644 src/efsw/DirectorySnapshot.hpp create mode 100644 src/efsw/DirectorySnapshotDiff.cpp create mode 100644 src/efsw/DirectorySnapshotDiff.hpp create mode 100644 src/efsw/FileInfo.cpp create mode 100644 src/efsw/FileInfo.hpp create mode 100644 src/efsw/FileSystem.cpp create mode 100644 src/efsw/FileSystem.hpp create mode 100644 src/efsw/FileWatcher.cpp create mode 100644 src/efsw/FileWatcherCWrapper.cpp create mode 100644 src/efsw/FileWatcherFSEvents.cpp create mode 100644 src/efsw/FileWatcherFSEvents.hpp create mode 100644 src/efsw/FileWatcherGeneric.cpp create mode 100644 src/efsw/FileWatcherGeneric.hpp create mode 100644 src/efsw/FileWatcherImpl.cpp create mode 100644 src/efsw/FileWatcherImpl.hpp create mode 100644 src/efsw/FileWatcherInotify.cpp create mode 100644 src/efsw/FileWatcherInotify.hpp create mode 100644 src/efsw/FileWatcherKqueue.cpp create mode 100644 src/efsw/FileWatcherKqueue.hpp create mode 100644 src/efsw/FileWatcherWin32.cpp create mode 100644 src/efsw/FileWatcherWin32.hpp create mode 100644 src/efsw/Lock.hpp create mode 100644 src/efsw/Log.cpp create mode 100644 src/efsw/Mutex.hpp create mode 100644 src/efsw/String.cpp create mode 100644 src/efsw/String.hpp create mode 100644 src/efsw/System.cpp create mode 100644 src/efsw/System.hpp create mode 100644 src/efsw/Thread.hpp create mode 100644 src/efsw/Utf.hpp create mode 100644 src/efsw/Utf.inl create mode 100644 src/efsw/Watcher.cpp create mode 100644 src/efsw/Watcher.hpp create mode 100644 src/efsw/WatcherFSEvents.cpp create mode 100644 src/efsw/WatcherFSEvents.hpp create mode 100644 src/efsw/WatcherGeneric.cpp create mode 100644 src/efsw/WatcherGeneric.hpp create mode 100644 src/efsw/WatcherInotify.cpp create mode 100644 src/efsw/WatcherInotify.hpp create mode 100644 src/efsw/WatcherKqueue.cpp create mode 100644 src/efsw/WatcherKqueue.hpp create mode 100644 src/efsw/WatcherWin32.cpp create mode 100644 src/efsw/WatcherWin32.hpp create mode 100644 src/efsw/base.hpp create mode 100644 src/efsw/inotify-nosys.h create mode 100644 src/efsw/platform/platformimpl.hpp create mode 100644 src/efsw/platform/posix/FileSystemImpl.cpp create mode 100644 src/efsw/platform/posix/FileSystemImpl.hpp create mode 100644 src/efsw/platform/posix/SystemImpl.cpp create mode 100644 src/efsw/platform/posix/SystemImpl.hpp create mode 100644 src/efsw/platform/win/FileSystemImpl.cpp create mode 100644 src/efsw/platform/win/FileSystemImpl.hpp create mode 100644 src/efsw/platform/win/SystemImpl.cpp create mode 100644 src/efsw/platform/win/SystemImpl.hpp create mode 100644 src/efsw/sophist.h create mode 100644 src/joomer-efsw-file-monitoring.cpp create mode 100644 src/stb_image.h create mode 100644 src/stb_image_write.h create mode 100644 src/test/efsw-test.c create mode 100644 src/test/efsw-test.cpp diff --git a/CMakeLists.txt b/CMakeLists.txt new file mode 100644 index 0000000..6ae6955 --- /dev/null +++ b/CMakeLists.txt @@ -0,0 +1,192 @@ +cmake_minimum_required(VERSION 3.15 FATAL_ERROR) + +project(efsw) + +set(CMAKE_POSITION_INDEPENDENT_CODE ON) +set(CMAKE_CXX_STANDARD 11) + +set(ESFW_MAIN_PROJECT OFF) + +if((CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR) AND(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)) + set(ESFW_MAIN_PROJECT ON) +endif() + +include(GNUInstallDirs) + +find_package(Threads REQUIRED) + +option(VERBOSE "Build efsw with verbose mode.") +option(BUILD_SHARED_LIBS "Build efsw as a shared library" ON) +option(BUILD_STATIC_LIBS "Build efsw as a static library" ON) +option(BUILD_TEST_APP "Build the test app" ${ESFW_MAIN_PROJECT}) +option(EFSW_INSTALL "Add efsw install targets" ${ESFW_MAIN_PROJECT}) + +add_library(efsw) + +if(BUILD_STATIC_LIBS) + add_library(efsw-static STATIC) + + target_include_directories(efsw-static + PRIVATE src/ + PUBLIC + $ + $ + $ + ) +endif() + +set(EFSW_CPP_SOURCE + src/efsw/Debug.cpp + src/efsw/DirectorySnapshot.cpp + src/efsw/DirectorySnapshotDiff.cpp + src/efsw/DirWatcherGeneric.cpp + src/efsw/FileInfo.cpp + src/efsw/FileSystem.cpp + src/efsw/FileWatcher.cpp + src/efsw/FileWatcherCWrapper.cpp + src/efsw/FileWatcherGeneric.cpp + src/efsw/FileWatcherImpl.cpp + src/efsw/Log.cpp + src/efsw/String.cpp + src/efsw/System.cpp + src/efsw/Watcher.cpp + src/efsw/WatcherGeneric.cpp +) + +target_include_directories(efsw + PRIVATE src/ + PUBLIC + $ + $ + $ +) + +if(VERBOSE) + target_compile_definitions(efsw PRIVATE EFSW_VERBOSE) +endif() + +target_compile_features(efsw PRIVATE cxx_std_11) + +if(BUILD_SHARED_LIBS) + target_compile_definitions(efsw PRIVATE EFSW_DYNAMIC EFSW_EXPORTS) +endif() + +# platforms +if(WIN32) + list(APPEND EFSW_CPP_SOURCE + src/efsw/platform/win/FileSystemImpl.cpp + src/efsw/platform/win/SystemImpl.cpp + ) +else() + list(APPEND EFSW_CPP_SOURCE + src/efsw/platform/posix/FileSystemImpl.cpp + src/efsw/platform/posix/SystemImpl.cpp + ) +endif() + +# watcher implementations +if(APPLE) + list(APPEND EFSW_CPP_SOURCE + src/efsw/FileWatcherFSEvents.cpp + src/efsw/FileWatcherKqueue.cpp + src/efsw/WatcherFSEvents.cpp + src/efsw/WatcherKqueue.cpp + ) +elseif(WIN32) + list(APPEND EFSW_CPP_SOURCE + src/efsw/FileWatcherWin32.cpp + src/efsw/WatcherWin32.cpp + ) +elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux") + list(APPEND EFSW_CPP_SOURCE + src/efsw/FileWatcherInotify.cpp + src/efsw/WatcherInotify.cpp + ) + + find_path(EFSW_INOTIFY_H NAMES sys/inotify.h NO_CACHE) + if(EFSW_INOTIFY_H STREQUAL "EFSW_INOTIFY_H-NOTFOUND") + target_compile_definitions(efsw PRIVATE EFSW_INOTIFY_NOSYS) + endif() +elseif(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD") + list(APPEND EFSW_CPP_SOURCE + src/efsw/FileWatcherKqueue.cpp + src/efsw/WatcherKqueue.cpp + ) +endif() + +if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" OR + (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")) + target_compile_definitions(efsw PRIVATE _SCL_SECURE_NO_WARNINGS) +else() + target_compile_options(efsw PRIVATE -Wall -Wno-long-long -fPIC) +endif() + +target_compile_definitions(efsw PRIVATE $,DEBUG,NDEBUG>) + +if(APPLE) + set(MAC_LIBS "-framework CoreFoundation" "-framework CoreServices") + target_link_libraries(efsw PRIVATE ${MAC_LIBS}) + if(BUILD_STATIC_LIBS) + target_link_libraries(efsw-static PRIVATE ${MAC_LIBS}) + endif() +elseif(NOT(${CMAKE_SYSTEM_NAME} MATCHES "Haiku") AND NOT WIN32) + target_link_libraries(efsw PRIVATE Threads::Threads) +endif() + +target_sources(efsw PRIVATE ${EFSW_CPP_SOURCE}) + +if(BUILD_STATIC_LIBS) + target_sources(efsw-static PRIVATE ${EFSW_CPP_SOURCE}) +endif() + +include(CMakePackageConfigHelpers) + +set(packageDestDir "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}") + +configure_package_config_file( + ${CMAKE_CURRENT_SOURCE_DIR}/efswConfig.cmake.in + ${CMAKE_CURRENT_BINARY_DIR}/cmake/efswConfig.cmake + INSTALL_DESTINATION "${packageDestDir}" + NO_SET_AND_CHECK_MACRO + NO_CHECK_REQUIRED_COMPONENTS_MACRO +) + +export(TARGETS efsw NAMESPACE efsw:: FILE ${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}Targets.cmake) +if(BUILD_STATIC_LIBS) + export(TARGETS efsw-static NAMESPACE efsw:: APPEND FILE ${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}Targets.cmake) +endif() + +if(EFSW_INSTALL) + install(TARGETS efsw EXPORT efswExport + LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} + ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} + RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} + ) + + install( + FILES + include/efsw/efsw.h include/efsw/efsw.hpp + DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/efsw + ) + + if(BUILD_STATIC_LIBS) + install(TARGETS efsw-static EXPORT efswExport + LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} + ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} + RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} + ) + endif() + + install(EXPORT efswExport NAMESPACE efsw:: DESTINATION "${packageDestDir}" FILE ${PROJECT_NAME}Targets.cmake) + install(FILES ${CMAKE_CURRENT_BINARY_DIR}/cmake/efswConfig.cmake DESTINATION "${packageDestDir}") +endif() + +if(BUILD_TEST_APP) + # C++ test application + add_executable(efsw-test src/test/efsw-test.cpp) + target_link_libraries(efsw-test efsw-static) + + # C test application + add_executable(efsw-test-stdc src/test/efsw-test.c) + target_link_libraries(efsw-test-stdc efsw-static) +endif() diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..37f354a --- /dev/null +++ b/LICENSE @@ -0,0 +1,22 @@ +Copyright (c) 2020 Martín Lucas Golini + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. + +This software is a fork of the "simplefilewatcher" by James Wynn (james@jameswynn.com) +http://code.google.com/p/simplefilewatcher/ also MIT licensed. diff --git a/compile_flags.txt b/compile_flags.txt new file mode 100644 index 0000000..d87aa27 --- /dev/null +++ b/compile_flags.txt @@ -0,0 +1,16 @@ +-Wno-documentation-unknown-command +-Wno-unknown-warning-option +-Wno-unknown-pragmas +-std=c++11 +-fsyntax-only +-Isrc +-Iinclude +-fmessage-length=0 +-fdiagnostics-show-note-include-stack +-fretain-comments-from-system-headers +-fmacro-backtrace-limit=0 +-ferror-limit=1000 +-Wall +-Wextra +-x +c++-header diff --git a/efswConfig.cmake.in b/efswConfig.cmake.in new file mode 100644 index 0000000..5340f33 --- /dev/null +++ b/efswConfig.cmake.in @@ -0,0 +1,10 @@ +# - Config file for the @CMAKE_PROJECT_NAME@ package + +@PACKAGE_INIT@ + +@DEPENDENCIES_SECTION@ +include(CMakeFindDependencyMacro) + +find_dependency(Threads) + +include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake") diff --git a/include/efsw/efsw.h b/include/efsw/efsw.h new file mode 100644 index 0000000..56f24d0 --- /dev/null +++ b/include/efsw/efsw.h @@ -0,0 +1,197 @@ +/** + @author Sepul Sepehr Taghdisian + + Copyright (c) 2024 Martín Lucas Golini + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. + + This software is a fork of the "simplefilewatcher" by James Wynn (james@jameswynn.com) + http://code.google.com/p/simplefilewatcher/ also MIT licensed. +*/ +/** This is the C API wrapper of EFSW */ +#ifndef ESFW_H +#define ESFW_H + +#ifdef __cplusplus +extern "C" { +#endif + +#if defined( _WIN32 ) +#ifdef EFSW_DYNAMIC +// Windows platforms +#ifdef EFSW_EXPORTS +// From DLL side, we must export +#define EFSW_API __declspec( dllexport ) +#else +// From client application side, we must import +#define EFSW_API __declspec( dllimport ) +#endif +#else +// No specific directive needed for static build +#ifndef EFSW_API +#define EFSW_API +#endif +#endif +#else +#if ( __GNUC__ >= 4 ) && defined( EFSW_EXPORTS ) +#define EFSW_API __attribute__( ( visibility( "default" ) ) ) +#endif + +// Other platforms don't need to define anything +#ifndef EFSW_API +#define EFSW_API +#endif +#endif + +/// Type for a watch id +typedef long efsw_watchid; + +/// Type for watcher +typedef void* efsw_watcher; + +enum efsw_action { + EFSW_ADD = 1, /// Sent when a file is created or renamed + EFSW_DELETE = 2, /// Sent when a file is deleted or renamed + EFSW_MODIFIED = 3, /// Sent when a file is modified + EFSW_MOVED = 4 /// Sent when a file is moved +}; + +enum efsw_error { + EFSW_NOTFOUND = -1, + EFSW_REPEATED = -2, + EFSW_OUTOFSCOPE = -3, + EFSW_NOTREADABLE = -4, + EFSW_REMOTE = -5, + EFSW_WATCHER_FAILED = -6, + EFSW_UNSPECIFIED = -7 +}; + +enum efsw_option { + /// For Windows, the default buffer size of 63*1024 bytes sometimes is not enough and + /// file system events may be dropped. For that, using a different (bigger) buffer size + /// can be defined here, but note that this does not work for network drives, + /// because a buffer larger than 64K will fail the folder being watched, see + /// http://msdn.microsoft.com/en-us/library/windows/desktop/aa365465(v=vs.85).aspx) + EFSW_OPT_WIN_BUFFER_SIZE = 1, + /// For Windows, per default all events are captured but we might only be interested + /// in a subset; the value of the option should be set to a bitwise or'ed set of + /// FILE_NOTIFY_CHANGE_* flags. + EFSW_OPT_WIN_NOTIFY_FILTER = 2, + /// For macOS (FSEvents backend), per default all modified event types are capture but we might + // only be interested in a subset; the value of the option should be set to a set of bitwise + // from: + // kFSEventStreamEventFlagItemFinderInfoMod + // kFSEventStreamEventFlagItemModified + // kFSEventStreamEventFlagItemInodeMetaMod + // Default configuration will set the 3 flags + EFSW_OPT_MAC_MODIFIED_FILTER = 3, + /// macOS sometimes informs incorrect or old file states that may confuse the consumer + /// The events sanitizer will try to sanitize incorrectly reported events in favor of reducing + /// the number of events reported. This will have an small performance and memory impact as a + /// consequence. + EFSW_OPT_MAC_SANITIZE_EVENTS = 4, + /// Linux does not support natively recursive watchers. This means that when using recursive + /// watches efsw registers new watchers for each directory. If new file are created between + /// the time efsw takes to register the new directory those events might be missed. To avoid + /// missing new file notifications efsw will trigger synthetic new file events for existing + /// files in the new directroy watched. This might have the unintended consequence of sending + /// duplicated created events due to the system also emitting this event. + LINUX_PRODUCE_SYNTHETIC_EVENTS = 5, +}; + +/// Basic interface for listening for file events. +typedef void ( *efsw_pfn_fileaction_callback )( efsw_watcher watcher, efsw_watchid watchid, + const char* dir, const char* filename, + enum efsw_action action, const char* old_filename, + void* param ); + +typedef void ( *efsw_pfn_handle_missed_fileactions )( efsw_watcher watcher, efsw_watchid watchid, + const char* dir ); + +typedef struct { + enum efsw_option option; + int value; +} efsw_watcher_option; + +/** + * Creates a new file-watcher + * @param generic_mode Force the use of the Generic file watcher + */ +efsw_watcher EFSW_API efsw_create( int generic_mode ); + +/// Release the file-watcher and unwatch any directories +void EFSW_API efsw_release( efsw_watcher watcher ); + +/// Retrieve last error occured by file-watcher +EFSW_API const char* efsw_getlasterror(); + +/// Reset file-watcher last error +EFSW_API void efsw_clearlasterror(); + +/// Add a directory watch +/// On error returns WatchID with Error type. +efsw_watchid EFSW_API efsw_addwatch( efsw_watcher watcher, const char* directory, + efsw_pfn_fileaction_callback callback_fn, int recursive, + void* param ); + +/// Add a directory watch, specifying options +/// @param options Pointer to an array of watcher options +/// @param nr_options Number of options referenced by \p options +efsw_watchid EFSW_API efsw_addwatch_withoptions( + efsw_watcher watcher, const char* directory, efsw_pfn_fileaction_callback callback_fn, + int recursive, efsw_watcher_option* options, int options_number, void* param, + efsw_pfn_handle_missed_fileactions callback_fn_missed_file_actions ); + +/// Remove a directory watch. This is a brute force search O(nlogn). +void EFSW_API efsw_removewatch( efsw_watcher watcher, const char* directory ); + +/// Remove a directory watch. This is a map lookup O(logn). +void EFSW_API efsw_removewatch_byid( efsw_watcher watcher, efsw_watchid watchid ); + +/// Starts watching ( in other thread ) +void EFSW_API efsw_watch( efsw_watcher watcher ); + +/** + * Allow recursive watchers to follow symbolic links to other directories + * followSymlinks is disabled by default + */ +void EFSW_API efsw_follow_symlinks( efsw_watcher watcher, int enable ); + +/** @return If can follow symbolic links to directorioes */ +int EFSW_API efsw_follow_symlinks_isenabled( efsw_watcher watcher ); + +/** + * When enable this it will allow symlinks to watch recursively out of the pointed directory. + * follorSymlinks must be enabled to this work. + * For example, added symlink to /home/folder, and the symlink points to /, this by default is not + * allowed, it's only allowed to symlink anything from /home/ and deeper. This is to avoid great + * levels of recursion. Enabling this could lead in infinite recursion, and crash the watcher ( it + * will try not to avoid this ). Buy enabling out of scope links, it will allow this behavior. + * allowOutOfScopeLinks are disabled by default. + */ +void EFSW_API efsw_allow_outofscopelinks( efsw_watcher watcher, int allow ); + +/// @return Returns if out of scope links are allowed +int EFSW_API efsw_outofscopelinks_isallowed( efsw_watcher watcher ); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/include/efsw/efsw.hpp b/include/efsw/efsw.hpp new file mode 100644 index 0000000..4787978 --- /dev/null +++ b/include/efsw/efsw.hpp @@ -0,0 +1,267 @@ +/** + @author Martín Lucas Golini + + Copyright (c) 2024 Martín Lucas Golini + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. + + This software is a fork of the "simplefilewatcher" by James Wynn (james@jameswynn.com) + http://code.google.com/p/simplefilewatcher/ also MIT licensed. +*/ + +#ifndef ESFW_HPP +#define ESFW_HPP + +#include +#include + +#if defined( _WIN32 ) +#ifdef EFSW_DYNAMIC +// Windows platforms +#ifdef EFSW_EXPORTS +// From DLL side, we must export +#define EFSW_API __declspec( dllexport ) +#else +// From client application side, we must import +#define EFSW_API __declspec( dllimport ) +#endif +#else +// No specific directive needed for static build +#ifndef EFSW_API +#define EFSW_API +#endif +#endif +#else +#if ( __GNUC__ >= 4 ) && defined( EFSW_EXPORTS ) +#ifndef EFSW_API +#define EFSW_API __attribute__( ( visibility( "default" ) ) ) +#endif +#endif + +// Other platforms don't need to define anything +#ifndef EFSW_API +#define EFSW_API +#endif +#endif + +namespace efsw { + +/// Type for a watch id +typedef long WatchID; + +// forward declarations +class FileWatcherImpl; +class FileWatchListener; +class WatcherOption; + +/// Actions to listen for. Rename will send two events, one for +/// the deletion of the old file, and one for the creation of the +/// new file. +namespace Actions { +enum Action { + /// Sent when a file is created or renamed + Add = 1, + /// Sent when a file is deleted or renamed + Delete = 2, + /// Sent when a file is modified + Modified = 3, + /// Sent when a file is moved + Moved = 4 +}; +} +typedef Actions::Action Action; + +/// Errors log namespace +namespace Errors { + +enum Error { + NoError = 0, + FileNotFound = -1, + FileRepeated = -2, + FileOutOfScope = -3, + FileNotReadable = -4, + /// Directory in remote file system + /// ( create a generic FileWatcher instance to watch this directory ). + FileRemote = -5, + /// File system watcher failed to watch for changes. + WatcherFailed = -6, + Unspecified = -7 +}; + +class EFSW_API Log { + public: + /// @return The last error logged + static std::string getLastErrorLog(); + + /// @return The code of the last error logged + static Error getLastErrorCode(); + + /// Reset last error + static void clearLastError(); + + /// Creates an error of the type specified + static Error createLastError( Error err, std::string log ); +}; + +} // namespace Errors +typedef Errors::Error Error; + +/// Optional file watcher settings. +namespace Options { +enum Option { + /// For Windows, the default buffer size of 63*1024 bytes sometimes is not enough and + /// file system events may be dropped. For that, using a different (bigger) buffer size + /// can be defined here, but note that this does not work for network drives, + /// because a buffer larger than 64K will fail the folder being watched, see + /// http://msdn.microsoft.com/en-us/library/windows/desktop/aa365465(v=vs.85).aspx) + WinBufferSize = 1, + /// For Windows, per default all events are captured but we might only be interested + /// in a subset; the value of the option should be set to a bitwise or'ed set of + /// FILE_NOTIFY_CHANGE_* flags. + WinNotifyFilter = 2, + /// For macOS (FSEvents backend), per default all modified event types are capture but we might + /// only be interested in a subset; the value of the option should be set to a set of bitwise + /// from: + /// kFSEventStreamEventFlagItemFinderInfoMod + /// kFSEventStreamEventFlagItemModified + /// kFSEventStreamEventFlagItemInodeMetaMod + /// Default configuration will set the 3 flags + MacModifiedFilter = 3, + /// macOS sometimes informs incorrect or old file states that may confuse the consumer + /// The events sanitizer will try to sanitize incorrectly reported events in favor of reducing + /// the number of events reported. This will have an small performance and memory impact as a + /// consequence. + MacSanitizeEvents = 4, + /// Linux does not support natively recursive watchers. This means that when using recursive + /// watches efsw registers new watchers for each directory. If new file are created between + /// the time efsw takes to register the new directory those events might be missed. To avoid + /// missing new file notifications efsw will trigger synthetic created file events for existing + /// files in the new directroy watched. This might have the unintended consequence of sending + /// duplicated created events due to the system also emitting this event. + LinuxProduceSyntheticEvents = 5, +}; +} +typedef Options::Option Option; + +/// Listens to files and directories and dispatches events +/// to notify the listener of files and directories changes. +/// @class FileWatcher +class EFSW_API FileWatcher { + public: + /// Default constructor, will use the default platform file watcher + FileWatcher(); + + /// Constructor that lets you force the use of the Generic File Watcher + explicit FileWatcher( bool useGenericFileWatcher ); + + virtual ~FileWatcher(); + + /// Add a directory watch. Same as the other addWatch, but doesn't have recursive option. + /// For backwards compatibility. + /// On error returns WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher ); + + /// Add a directory watch + /// On error returns WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive ); + + /// Add a directory watch, allowing customization with options + /// @param directory The folder to be watched + /// @param watcher The listener to receive events + /// @param recursive Set this to true to include subdirectories + /// @param options Allows customization of a watcher + /// @return Returns the watch id for the directory or, on error, a WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + const std::vector& options ); + + /// Remove a directory watch. This is a brute force search O(nlogn). + void removeWatch( const std::string& directory ); + + /// Remove a directory watch. This is a map lookup O(logn). + void removeWatch( WatchID watchid ); + + /// Starts watching ( in other thread ) + void watch(); + + /// @return Returns a list of the directories that are being watched + std::vector directories(); + + /** Allow recursive watchers to follow symbolic links to other directories + * followSymlinks is disabled by default + */ + void followSymlinks( bool follow ); + + /** @return If can follow symbolic links to directorioes */ + const bool& followSymlinks() const; + + /** When enable this it will allow symlinks to watch recursively out of the pointed directory. + * follorSymlinks must be enabled to this work. + * For example, added symlink to /home/folder, and the symlink points to /, this by default is + * not allowed, it's only allowed to symlink anything from /home/ and deeper. This is to avoid + * great levels of recursion. Enabling this could lead in infinite recursion, and crash the + * watcher ( it will try not to avoid this ). Buy enabling out of scope links, it will allow + * this behavior. allowOutOfScopeLinks are disabled by default. + */ + void allowOutOfScopeLinks( bool allow ); + + /// @return Returns if out of scope links are allowed + const bool& allowOutOfScopeLinks() const; + + private: + /// The implementation + FileWatcherImpl* mImpl; + bool mFollowSymlinks; + bool mOutOfScopeLinks; +}; + +/// Basic interface for listening for file events. +/// @class FileWatchListener +class FileWatchListener { + public: + virtual ~FileWatchListener() {} + + /// Handles the action file action + /// @param watchid The watch id for the directory + /// @param dir The directory + /// @param filename The filename that was accessed (not full path) + /// @param action Action that was performed + /// @param oldFilename The name of the file or directory moved + virtual void handleFileAction( WatchID watchid, const std::string& dir, + const std::string& filename, Action action, + std::string oldFilename = "" ) = 0; + + /// Handles that have missed file actions + /// @param watchid The watch id for the directory + /// @param dir The directory + virtual void handleMissedFileActions( WatchID /*watchid*/, + const std::string& /*dir*/ ) {} +}; + +/// Optional, typically platform specific parameter for customization of a watcher. +/// @class WatcherOption +class WatcherOption { + public: + WatcherOption( Option option, int value ) : mOption( option ), mValue( value ){}; + Option mOption; + int mValue; +}; + +} // namespace efsw + +#endif diff --git a/premake4.lua b/premake4.lua new file mode 100644 index 0000000..ab02dd2 --- /dev/null +++ b/premake4.lua @@ -0,0 +1,261 @@ +newoption { trigger = "verbose", description = "Build efsw with verbose mode." } +newoption { trigger = "strip-symbols", description = "Strip debugging symbols in other file ( only for relwithdbginfo configuration )." } +newoption { trigger = "thread-sanitizer", description ="Compile with ThreadSanitizer." } + +efsw_major_version = "1" +efsw_minor_version = "5" +efsw_patch_version = "0" +efsw_version = efsw_major_version .. "." .. efsw_minor_version .. "." .. efsw_patch_version + +function get_include_paths() + local function _insert_include_paths( file ) + local function _trim(s) + return (s:gsub("^%s*(.-)%s*$", "%1")) + end + + local paths = { } + local lines = file:read('*all') + + for line in string.gmatch(lines, '([^\n]+)') + do + table.insert( paths, _trim( line ) ) + end + + file:close() + + return paths + end + + local file = io.popen( "echo | gcc -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -v '#' | grep '/'", 'r' ) + local include_paths = _insert_include_paths( file ) + + if next(include_paths) == nil then + file = io.popen( "echo | clang++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -v '#' | grep '/' | grep -v 'nonexistent'", 'r' ) + + include_paths = _insert_include_paths( file ) + + if next(include_paths) == nil then + table.insert( include_paths, "/usr/include" ) + table.insert( include_paths, "/usr/local/include" ) + end + end + + return include_paths +end + +function inotify_header_exists() + local efsw_include_paths = get_include_paths() + + for _,v in pairs( efsw_include_paths ) + do + local cur_path = v .. "/sys/inotify.h" + + if os.isfile( cur_path ) then + return true + end + end + + return false +end + +function string.starts(String,Start) + if ( _ACTION ) then + return string.sub(String,1,string.len(Start))==Start + end + + return false +end + +function is_vs() + return ( string.starts(_ACTION,"vs") ) +end + +function conf_warnings() + if not is_vs() then + buildoptions{ "-Wall -Wno-long-long" } + + if not os.is("windows") then + buildoptions{ "-fPIC" } + end + else + defines { "_SCL_SECURE_NO_WARNINGS" } + end + + if _OPTIONS["thread-sanitizer"] then + buildoptions { "-fsanitize=thread" } + linkoptions { "-fsanitize=thread" } + if not os.is("macosx") then + links { "tsan" } + end + end +end + +function conf_links() + if not os.is("windows") and not os.is("haiku") then + links { "pthread" } + end + + if os.is("macosx") then + links { "CoreFoundation.framework", "CoreServices.framework" } + end +end + +function conf_excludes() + if os.is("windows") then + excludes { "src/efsw/WatcherKqueue.cpp", "src/efsw/WatcherFSEvents.cpp", "src/efsw/WatcherInotify.cpp", "src/efsw/FileWatcherKqueue.cpp", "src/efsw/FileWatcherInotify.cpp", "src/efsw/FileWatcherFSEvents.cpp" } + elseif os.is("linux") then + excludes { "src/efsw/WatcherKqueue.cpp", "src/efsw/WatcherFSEvents.cpp", "src/efsw/WatcherWin32.cpp", "src/efsw/FileWatcherKqueue.cpp", "src/efsw/FileWatcherWin32.cpp", "src/efsw/FileWatcherFSEvents.cpp" } + elseif os.is("macosx") then + excludes { "src/efsw/WatcherInotify.cpp", "src/efsw/WatcherWin32.cpp", "src/efsw/FileWatcherInotify.cpp", "src/efsw/FileWatcherWin32.cpp" } + elseif os.is("freebsd") then + excludes { "src/efsw/WatcherInotify.cpp", "src/efsw/WatcherWin32.cpp", "src/efsw/WatcherFSEvents.cpp", "src/efsw/FileWatcherInotify.cpp", "src/efsw/FileWatcherWin32.cpp", "src/efsw/FileWatcherFSEvents.cpp" } + end + + if os.is("linux") and not inotify_header_exists() then + defines { "EFSW_INOTIFY_NOSYS" } + end +end + +solution "efsw" + location("./make/" .. os.get() .. "/") + targetdir("./bin") + configurations { "debug", "release", "relwithdbginfo" } + + if os.is("windows") then + osfiles = "src/efsw/platform/win/*.cpp" + else + osfiles = "src/efsw/platform/posix/*.cpp" + end + + -- Activates verbose mode + if _OPTIONS["verbose"] then + defines { "EFSW_VERBOSE" } + end + + if not is_vs() then + buildoptions { "-std=c++11" } + end + + if os.is("macosx") then + -- Premake 4.4 needed for this + if not string.match(_PREMAKE_VERSION, "^4.[123]") then + local ver = os.getversion(); + + if not ( ver.majorversion >= 10 and ver.minorversion >= 5 ) then + defines { "EFSW_FSEVENTS_NOT_SUPPORTED" } + end + end + end + + objdir("obj/" .. os.get() .. "/") + + project "efsw-static-lib" + kind "StaticLib" + language "C++" + targetdir("./lib") + includedirs { "include", "src" } + files { "src/efsw/*.cpp", osfiles } + conf_excludes() + + configuration "debug" + defines { "DEBUG" } + flags { "Symbols" } + targetname "efsw-static-debug" + conf_warnings() + + configuration "release" + defines { "NDEBUG" } + flags { "Optimize" } + targetname "efsw-static-release" + conf_warnings() + + configuration "relwithdbginfo" + defines { "NDEBUG" } + flags { "Optimize", "Symbols" } + targetname "efsw-static-reldbginfo" + conf_warnings() + + project "efsw-test" + kind "ConsoleApp" + language "C++" + links { "efsw-static-lib" } + files { "src/test/*.cpp" } + includedirs { "include", "src" } + conf_links() + + configuration "debug" + defines { "DEBUG" } + flags { "Symbols" } + targetname "efsw-test-debug" + conf_warnings() + + configuration "release" + defines { "NDEBUG" } + flags { "Optimize" } + targetname "efsw-test-release" + conf_warnings() + + configuration "relwithdbginfo" + defines { "NDEBUG" } + flags { "Optimize", "Symbols" } + targetname "efsw-test-reldbginfo" + conf_warnings() + + project "efsw-test-stdc" + kind "ConsoleApp" + language "C" + links { "efsw-shared-lib" } + files { "src/test/*.c" } + includedirs { "include", "src" } + conf_links() + + configuration "debug" + defines { "DEBUG" } + flags { "Symbols" } + targetname "efsw-test-stdc-debug" + conf_warnings() + + configuration "release" + defines { "NDEBUG" } + flags { "Optimize" } + targetname "efsw-test-stdc-release" + conf_warnings() + + configuration "relwithdbginfo" + defines { "NDEBUG" } + flags { "Optimize", "Symbols" } + targetname "efsw-test-stdc-reldbginfo" + conf_warnings() + + project "efsw-shared-lib" + kind "SharedLib" + language "C++" + targetdir("./lib") + includedirs { "include", "src" } + files { "src/efsw/*.cpp", osfiles } + defines { "EFSW_DYNAMIC", "EFSW_EXPORTS" } + conf_excludes() + conf_links() + + configuration "debug" + defines { "DEBUG" } + flags { "Symbols" } + targetname "efsw-debug" + conf_warnings() + + configuration "release" + defines { "NDEBUG" } + flags { "Optimize" } + targetname "efsw" + conf_warnings() + + configuration "relwithdbginfo" + defines { "NDEBUG" } + flags { "Optimize", "Symbols" } + targetname "efsw" + conf_warnings() + + if os.is("linux") or os.is("bsd") or os.is("haiku") then + targetextension ( ".so." .. efsw_version ) + postbuildcommands { "sh ../../project/build.reldbginfo.sh " .. efsw_major_version .. " " .. efsw_minor_version .. " " .. efsw_patch_version .. " " .. iif( _OPTIONS["strip-symbols"], "strip-symbols", "" ) } + end diff --git a/premake5.lua b/premake5.lua new file mode 100644 index 0000000..514fe39 --- /dev/null +++ b/premake5.lua @@ -0,0 +1,273 @@ +newoption { trigger = "verbose", description = "Build efsw with verbose mode." } +newoption { trigger = "strip-symbols", description = "Strip debugging symbols in other file ( only for relwithdbginfo configuration )." } +newoption { trigger = "thread-sanitizer", description ="Compile with ThreadSanitizer" } + +efsw_major_version = "1" +efsw_minor_version = "5" +efsw_patch_version = "0" +efsw_version = efsw_major_version .. "." .. efsw_minor_version .. "." .. efsw_patch_version + +function get_include_paths() + local function _insert_include_paths( file ) + local function _trim(s) + return (s:gsub("^%s*(.-)%s*$", "%1")) + end + + local paths = { } + local lines = file:read('*all') + + for line in string.gmatch(lines, '([^\n]+)') + do + table.insert( paths, _trim( line ) ) + end + + file:close() + + return paths + end + + local file = io.popen( "echo | gcc -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -v '#' | grep '/'", 'r' ) + local include_paths = _insert_include_paths( file ) + + if next(include_paths) == nil then + file = io.popen( "echo | clang++ -Wp,-v -x c++ - -fsyntax-only 2>&1 | grep -v '#' | grep '/' | grep -v 'nonexistent'", 'r' ) + + include_paths = _insert_include_paths( file ) + + if next(include_paths) == nil then + table.insert( include_paths, "/usr/include" ) + table.insert( include_paths, "/usr/local/include" ) + end + end + + return include_paths +end + +function inotify_header_exists() + local efsw_include_paths = get_include_paths() + + for _,v in pairs( efsw_include_paths ) + do + local cur_path = v .. "/sys/inotify.h" + + if os.isfile( cur_path ) then + return true + end + end + + return false +end + +function string.starts(String,Start) + if ( _ACTION ) then + return string.sub(String,1,string.len(Start))==Start + end + + return false +end + +function is_vs() + return ( string.starts(_ACTION,"vs") ) +end + +function conf_warnings() + if not is_vs() then + buildoptions{ "-Wall -Wno-long-long" } + + if not os.istarget("windows") then + buildoptions{ "-fPIC" } + end + else + defines { "_SCL_SECURE_NO_WARNINGS" } + end + + if _OPTIONS["thread-sanitizer"] then + buildoptions { "-fsanitize=thread" } + linkoptions { "-fsanitize=thread" } + if not os.istarget("macosx") then + links { "tsan" } + end + end +end + +function conf_links() + if not os.istarget("windows") and not os.istarget("haiku") then + links { "pthread" } + end + + if os.istarget("macosx") then + links { "CoreFoundation.framework", "CoreServices.framework" } + end +end + +function conf_excludes() + if os.istarget("windows") then + excludes { "src/efsw/WatcherKqueue.cpp", "src/efsw/WatcherFSEvents.cpp", "src/efsw/WatcherInotify.cpp", "src/efsw/FileWatcherKqueue.cpp", "src/efsw/FileWatcherInotify.cpp", "src/efsw/FileWatcherFSEvents.cpp" } + elseif os.istarget("linux") then + excludes { "src/efsw/WatcherKqueue.cpp", "src/efsw/WatcherFSEvents.cpp", "src/efsw/WatcherWin32.cpp", "src/efsw/FileWatcherKqueue.cpp", "src/efsw/FileWatcherWin32.cpp", "src/efsw/FileWatcherFSEvents.cpp" } + elseif os.istarget("macosx") then + excludes { "src/efsw/WatcherInotify.cpp", "src/efsw/WatcherWin32.cpp", "src/efsw/FileWatcherInotify.cpp", "src/efsw/FileWatcherWin32.cpp" } + elseif os.istarget("bsd") then + excludes { "src/efsw/WatcherInotify.cpp", "src/efsw/WatcherWin32.cpp", "src/efsw/WatcherFSEvents.cpp", "src/efsw/FileWatcherInotify.cpp", "src/efsw/FileWatcherWin32.cpp", "src/efsw/FileWatcherFSEvents.cpp" } + end + + if os.istarget("linux") and not inotify_header_exists() then + defines { "EFSW_INOTIFY_NOSYS" } + end +end + +workspace "efsw" + location("./make/" .. os.target() .. "/") + targetdir("./bin") + configurations { "debug", "release", "relwithdbginfo" } + platforms { "x86_64", "x86", "ARM", "ARM64" } + + if os.istarget("windows") then + osfiles = "src/efsw/platform/win/*.cpp" + else + osfiles = "src/efsw/platform/posix/*.cpp" + end + + -- Activates verbose mode + if _OPTIONS["verbose"] then + defines { "EFSW_VERBOSE" } + end + + cppdialect "C++11" + + objdir("obj/" .. os.target() .. "/") + + filter "platforms:x86" + architecture "x86" + + filter "platforms:x86_64" + architecture "x86_64" + + filter "platforms:arm" + architecture "ARM" + + filter "platforms:arm64" + architecture "ARM64" + + project "efsw-static-lib" + kind "StaticLib" + language "C++" + targetdir("./lib") + includedirs { "include", "src" } + files { "src/efsw/*.cpp", osfiles } + conf_excludes() + + filter "configurations:debug" + defines { "DEBUG" } + symbols "On" + targetname "efsw-static-debug" + conf_warnings() + + filter "configurations:release" + defines { "NDEBUG" } + optimize "On" + targetname "efsw-static-release" + conf_warnings() + + filter "configurations:relwithdbginfo" + defines { "NDEBUG" } + symbols "On" + optimize "On" + targetname "efsw-static-reldbginfo" + conf_warnings() + + project "efsw-test" + kind "ConsoleApp" + language "C++" + links { "efsw-static-lib" } + files { "src/test/*.cpp" } + includedirs { "include", "src" } + conf_links() + + filter "configurations:debug" + defines { "DEBUG" } + symbols "On" + targetname "efsw-test-debug" + conf_warnings() + + filter "configurations:release" + defines { "NDEBUG" } + optimize "On" + targetname "efsw-test-release" + conf_warnings() + + filter "configurations:relwithdbginfo" + defines { "NDEBUG" } + symbols "On" + optimize "On" + targetname "efsw-test-reldbginfo" + conf_warnings() + + project "joomer-efsw-file-monitoring" + kind "ConsoleApp" + language "C++" + links { "efsw-static-lib" } + files { "src/joomer-efsw-file-monitoring.cpp" } + includedirs { "include", "src" } + conf_links() + + project "efsw-test-stdc" + kind "ConsoleApp" + language "C" + links { "efsw-shared-lib" } + files { "src/test/*.c" } + includedirs { "include", "src" } + conf_links() + + filter "configurations:debug" + defines { "DEBUG" } + symbols "On" + targetname "efsw-test-stdc-debug" + conf_warnings() + + filter "configurations:release" + defines { "NDEBUG" } + optimize "On" + targetname "efsw-test-stdc-release" + conf_warnings() + + filter "configurations:relwithdbginfo" + defines { "NDEBUG" } + symbols "On" + optimize "On" + targetname "efsw-test-stdc-reldbginfo" + conf_warnings() + + project "efsw-shared-lib" + kind "SharedLib" + language "C++" + targetdir("./lib") + includedirs { "include", "src" } + files { "src/efsw/*.cpp", osfiles } + defines { "EFSW_DYNAMIC", "EFSW_EXPORTS" } + conf_excludes() + conf_links() + + filter "configurations:debug" + defines { "DEBUG" } + symbols "On" + targetname "efsw-debug" + conf_warnings() + + filter "configurations:release" + defines { "NDEBUG" } + optimize "On" + targetname "efsw" + conf_warnings() + + filter "configurations:relwithdbginfo" + defines { "NDEBUG" } + symbols "On" + optimize "On" + targetname "efsw" + conf_warnings() + + if os.istarget("linux") or os.istarget("bsd") or os.istarget("haiku") then + targetextension ( ".so." .. efsw_version ) + postbuildcommands { "sh ../../project/build.reldbginfo.sh " .. efsw_major_version .. " " .. efsw_minor_version .. " " .. efsw_patch_version .. " " .. iif( _OPTIONS["strip-symbols"], "strip-symbols", "" ) } + end diff --git a/project/build.reldbginfo.sh b/project/build.reldbginfo.sh new file mode 100644 index 0000000..5ec272b --- /dev/null +++ b/project/build.reldbginfo.sh @@ -0,0 +1,9 @@ +#!/bin/sh +cd ../../lib +ln -fs libefsw.so.$1.$2.$3 libefsw.so.$1 +ln -fs libefsw.so.$1 libefsw.so + +if [ "$4" == "strip-symbols" ]; then + objcopy --only-keep-debug libefsw.so.$1.$2.$3 libefsw.debug + objcopy --strip-debug libefsw.so.$1.$2.$3 +fi diff --git a/project/qtcreator-linux/efsw.cflags b/project/qtcreator-linux/efsw.cflags new file mode 100644 index 0000000..5905d6d --- /dev/null +++ b/project/qtcreator-linux/efsw.cflags @@ -0,0 +1 @@ +-std=c11 diff --git a/project/qtcreator-linux/efsw.config b/project/qtcreator-linux/efsw.config new file mode 100644 index 0000000..8cec188 --- /dev/null +++ b/project/qtcreator-linux/efsw.config @@ -0,0 +1 @@ +// ADD PREDEFINED MACROS HERE! diff --git a/project/qtcreator-linux/efsw.creator b/project/qtcreator-linux/efsw.creator new file mode 100644 index 0000000..e94cbbd --- /dev/null +++ b/project/qtcreator-linux/efsw.creator @@ -0,0 +1 @@ +[General] diff --git a/project/qtcreator-linux/efsw.creator.user b/project/qtcreator-linux/efsw.creator.user new file mode 100644 index 0000000..0bcd422 --- /dev/null +++ b/project/qtcreator-linux/efsw.creator.user @@ -0,0 +1,344 @@ + + + + + + EnvironmentId + {d43f4693-30c1-436c-b1d1-498aab2c2f8c} + + + ProjectExplorer.Project.ActiveTarget + 0 + + + ProjectExplorer.Project.EditorSettings + + true + false + true + + Cpp + + CppGlobal + + + + QmlJS + + QmlJSGlobal + + + + Nim + + NimGlobal + + + 3 + UTF-8 + false + 4 + false + 80 + true + true + 1 + false + true + false + 0 + true + true + 0 + 8 + true + false + 1 + true + true + true + *.md, *.MD, Makefile + false + true + true + + + + ProjectExplorer.Project.PluginSettings + + + true + false + true + true + true + true + + + 0 + true + + true + Builtin.BuildSystem + + false + false + + 0 + + + + true + + false + + + + true + + true + + + + + ProjectExplorer.Project.Target.0 + + Desktop + Desktop + Desktop + {6d057187-158a-4883-8d5b-d470a6b6b025} + 1 + 0 + 0 + + ../../make/linux + + + true + gmake2 + premake5 + %{buildDir}../../../ + ProjectExplorer.ProcessStep + + + -j24 -e config=release_x86_64 + make + true + GenericProjectManager.GenericMakeStep + + 2 + Build + Build + ProjectExplorer.BuildSteps.Build + + + + + clean + + -e config=release_x86_64 + true + GenericProjectManager.GenericMakeStep + + 1 + Clean + Clean + ProjectExplorer.BuildSteps.Clean + + 2 + false + + false + + release + GenericProjectManager.GenericBuildConfiguration + + + ../../make/linux + + + true + --thread-sanitizer --verbose gmake2 + premake5 + %{buildDir}../../../ + ProjectExplorer.ProcessStep + + + -j24 + make + true + GenericProjectManager.GenericMakeStep + + 2 + Build + Build + ProjectExplorer.BuildSteps.Build + + + + + clean + + -e config=debug_x86_64 + true + GenericProjectManager.GenericMakeStep + + 1 + Clean + Clean + ProjectExplorer.BuildSteps.Clean + + 2 + false + + false + + debug + GenericProjectManager.GenericBuildConfiguration + + + ../../make/linux + + + true + gmake2 + premake5 + %{buildDir}../../../ + ProjectExplorer.ProcessStep + + + -e config=relwithdbginfo_x86_64 + make + true + GenericProjectManager.GenericMakeStep + + 2 + Build + Build + ProjectExplorer.BuildSteps.Build + + + + + clean + + -e config=relwithdbginfo_x86_64 + true + GenericProjectManager.GenericMakeStep + + 1 + Clean + Clean + ProjectExplorer.BuildSteps.Clean + + 2 + false + + false + + relwithdbginfo + GenericProjectManager.GenericBuildConfiguration + + 3 + + + 0 + Deploy + Deploy + ProjectExplorer.BuildSteps.Deploy + + 1 + + false + ProjectExplorer.DefaultDeployConfiguration + + 1 + + dwarf + + cpu-cycles + + -F + true + 0 + true + true + + 2 + + %{buildDir}/../../bin/efsw-test-debug + debug + ProjectExplorer.CustomExecutableRunConfiguration + + /home/programming/thebricks/fe/ + true + false + false + true + true + %{buildDir}../../../ + + + dwarf + + cpu-cycles + + -F + true + 0 + true + true + + 2 + + %{buildDir}../../../bin/efsw-test-release + release + ProjectExplorer.CustomExecutableRunConfiguration + + true + false + false + true + true + %{buildDir}../../../ + + + dwarf + + cpu-cycles + + -F + true + 0 + true + true + + 2 + + %{buildDir}../../../bin/efsw-test-dbginfo + reldbginfo + ProjectExplorer.CustomExecutableRunConfiguration + + true + false + false + true + true + %{buildDir}../../../ + + 3 + + + + ProjectExplorer.Project.TargetCount + 1 + + + ProjectExplorer.Project.Updater.FileVersion + 22 + + + Version + 22 + + diff --git a/project/qtcreator-linux/efsw.cxxflags b/project/qtcreator-linux/efsw.cxxflags new file mode 100644 index 0000000..c24e3b5 --- /dev/null +++ b/project/qtcreator-linux/efsw.cxxflags @@ -0,0 +1 @@ +-std=c++11 diff --git a/project/qtcreator-linux/efsw.files b/project/qtcreator-linux/efsw.files new file mode 100644 index 0000000..2eb9989 --- /dev/null +++ b/project/qtcreator-linux/efsw.files @@ -0,0 +1,118 @@ +../../CMakeLists.txt +../../include/efsw/efsw.hpp +../../premake5.lua +../../src/efsw/Atomic.hpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/Thread.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/System.cpp +../../src/efsw/platform/platformimpl.hpp +../../src/efsw/platform/posix/ThreadImpl.hpp +../../src/efsw/platform/posix/MutexImpl.hpp +../../src/efsw/platform/posix/SystemImpl.hpp +../../src/efsw/platform/posix/ThreadImpl.cpp +../../src/efsw/platform/posix/MutexImpl.cpp +../../src/efsw/platform/posix/SystemImpl.cpp +../../src/efsw/platform/win/ThreadImpl.hpp +../../src/efsw/platform/win/MutexImpl.hpp +../../src/efsw/platform/win/SystemImpl.hpp +../../src/efsw/platform/win/ThreadImpl.cpp +../../src/efsw/platform/win/MutexImpl.cpp +../../src/efsw/platform/win/SystemImpl.cpp +../../src/efsw/base.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/platform/posix/FileSystemImpl.hpp +../../src/efsw/platform/posix/FileSystemImpl.cpp +../../src/efsw/platform/win/FileSystemImpl.hpp +../../src/efsw/platform/win/FileSystemImpl.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/base.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/sophist.h +../../src/efsw/base.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/Utf.inl +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/test/efsw-test.cpp +../../premake4.lua +../../src/efsw/WatcherKqueue.hpp +../../src/efsw/WatcherKqueue.cpp +../../src/efsw/Debug.hpp +../../src/efsw/Debug.cpp +../../src/efsw/WatcherGeneric.hpp +../../src/efsw/WatcherGeneric.cpp +../../src/efsw/DirWatcherGeneric.hpp +../../src/efsw/DirWatcherGeneric.cpp +../../src/efsw/Log.cpp +../../src/efsw/WatcherInotify.hpp +../../src/efsw/WatcherInotify.cpp +../../src/efsw/FileWatcherImpl.cpp +../../src/efsw/DirectorySnapshot.hpp +../../src/efsw/DirectorySnapshot.cpp +../../src/efsw/DirectorySnapshotDiff.hpp +../../src/efsw/DirectorySnapshotDiff.cpp +../../src/efsw/WatcherFSEvents.hpp +../../src/efsw/FileWatcherFSEvents.hpp +../../src/efsw/WatcherFSEvents.cpp +../../src/efsw/FileWatcherFSEvents.cpp +../../src/efsw/Watcher.hpp +../../src/efsw/Watcher.cpp +../../src/efsw/WatcherWin32.hpp +../../src/efsw/WatcherWin32.cpp +../../README.md +../../include/efsw/efsw.h +../../src/efsw/FileWatcherCWrapper.cpp +../../src/efsw/inotify-nosys.h diff --git a/project/qtcreator-linux/efsw.includes b/project/qtcreator-linux/efsw.includes new file mode 100644 index 0000000..1ab792a --- /dev/null +++ b/project/qtcreator-linux/efsw.includes @@ -0,0 +1,2 @@ +../../include +../../src diff --git a/project/qtcreator-osx/efsw.cflags b/project/qtcreator-osx/efsw.cflags new file mode 100644 index 0000000..68d5165 --- /dev/null +++ b/project/qtcreator-osx/efsw.cflags @@ -0,0 +1 @@ +-std=c17 \ No newline at end of file diff --git a/project/qtcreator-osx/efsw.config b/project/qtcreator-osx/efsw.config new file mode 100644 index 0000000..685bb2d --- /dev/null +++ b/project/qtcreator-osx/efsw.config @@ -0,0 +1,3 @@ +// ADD PREDEFINED MACROS HERE! +#define EFSW_FSEVENTS_SUPPORTED +#define EFSW_USE_CXX11 diff --git a/project/qtcreator-osx/efsw.creator b/project/qtcreator-osx/efsw.creator new file mode 100644 index 0000000..e94cbbd --- /dev/null +++ b/project/qtcreator-osx/efsw.creator @@ -0,0 +1 @@ +[General] diff --git a/project/qtcreator-osx/efsw.creator.user b/project/qtcreator-osx/efsw.creator.user new file mode 100644 index 0000000..c1e8795 --- /dev/null +++ b/project/qtcreator-osx/efsw.creator.user @@ -0,0 +1,253 @@ + + + + + + EnvironmentId + {49267ae2-f136-4b84-8041-cf11a20f6a32} + + + ProjectExplorer.Project.ActiveTarget + 0 + + + ProjectExplorer.Project.EditorSettings + + true + false + true + + Cpp + + CppGlobal + + + + QmlJS + + QmlJSGlobal + + + 2 + UTF-8 + false + 4 + true + 80 + true + true + 1 + 0 + false + true + false + 0 + true + true + 0 + 8 + true + false + 1 + true + true + true + *.md, *.MD, Makefile + false + true + true + + + + ProjectExplorer.Project.PluginSettings + + + true + false + true + true + true + true + + + 0 + true + + true + + true + true + Builtin.DefaultTidyAndClazy + 4 + false + + + + true + + + + + ProjectExplorer.Project.Target.0 + + Desktop + Desktop (arm-darwin-generic-mach_o-64bit) + Desktop (arm-darwin-generic-mach_o-64bit) + {6d6b6d62-1e99-4e76-b5e2-cf731a0dbd92} + 0 + 0 + 0 + + ../../make/macosx/ + + + true + --file=../../premake4.lua --thread-sanitizer --verbose gmake + /usr/local/bin/premake4 + %{buildDir} + ProjectExplorer.ProcessStep + + + -j4 + true + GenericProjectManager.GenericMakeStep + + 2 + Build + Build + ProjectExplorer.BuildSteps.Build + + + + + clean + + true + GenericProjectManager.GenericMakeStep + + 1 + Clean + Clean + ProjectExplorer.BuildSteps.Clean + + 2 + false + + false + + debug + GenericProjectManager.GenericBuildConfiguration + + + ../../make/macosx/ + + + true + --file=../../premake4.lua gmake + /usr/local/bin/premake4 + %{buildDir} + ProjectExplorer.ProcessStep + + + -j4 config=release + true + GenericProjectManager.GenericMakeStep + + 2 + Build + Build + ProjectExplorer.BuildSteps.Build + + + + + clean + + config=release + true + GenericProjectManager.GenericMakeStep + + 1 + Clean + Clean + ProjectExplorer.BuildSteps.Clean + + 2 + false + + false + + release + GenericProjectManager.GenericBuildConfiguration + + 2 + + + 0 + Deploy + Deploy + ProjectExplorer.BuildSteps.Deploy + + 1 + + false + ProjectExplorer.DefaultDeployConfiguration + + 1 + + true + 0 + true + true + + 2 + + false + /Users/prognoz/programming/efsw/bin/efsw-test-debug + debug + ProjectExplorer.CustomExecutableRunConfiguration + + true + 0 + false + 1 + false + false + %{buildDir}/../../bin + + + true + 0 + true + true + + 2 + + false + efsw-test + release + ProjectExplorer.CustomExecutableRunConfiguration + + false + 1 + false + true + false + %{buildDir}/../../bin/ + + 2 + + + + ProjectExplorer.Project.TargetCount + 1 + + + ProjectExplorer.Project.Updater.FileVersion + 22 + + + Version + 22 + + diff --git a/project/qtcreator-osx/efsw.cxxflags b/project/qtcreator-osx/efsw.cxxflags new file mode 100644 index 0000000..6435dfc --- /dev/null +++ b/project/qtcreator-osx/efsw.cxxflags @@ -0,0 +1 @@ +-std=c++17 \ No newline at end of file diff --git a/project/qtcreator-osx/efsw.files b/project/qtcreator-osx/efsw.files new file mode 100644 index 0000000..0ab369f --- /dev/null +++ b/project/qtcreator-osx/efsw.files @@ -0,0 +1,185 @@ +../../include/efsw/efsw.hpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/Thread.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/System.cpp +../../src/efsw/platform/platformimpl.hpp +../../src/efsw/platform/posix/ThreadImpl.hpp +../../src/efsw/platform/posix/MutexImpl.hpp +../../src/efsw/platform/posix/SystemImpl.hpp +../../src/efsw/platform/posix/ThreadImpl.cpp +../../src/efsw/platform/posix/MutexImpl.cpp +../../src/efsw/platform/posix/SystemImpl.cpp +../../src/efsw/platform/win/ThreadImpl.hpp +../../src/efsw/platform/win/MutexImpl.hpp +../../src/efsw/platform/win/SystemImpl.hpp +../../src/efsw/platform/win/ThreadImpl.cpp +../../src/efsw/platform/win/MutexImpl.cpp +../../src/efsw/platform/win/SystemImpl.cpp +../../src/efsw/base.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/platform/posix/FileSystemImpl.hpp +../../src/efsw/platform/posix/FileSystemImpl.cpp +../../src/efsw/platform/win/FileSystemImpl.hpp +../../src/efsw/platform/win/FileSystemImpl.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/base.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/sophist.h +../../src/efsw/base.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/Utf.inl +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/test/efsw-test.cpp +../../premake4.lua +../../src/efsw/WatcherKqueue.hpp +../../src/efsw/WatcherKqueue.cpp +../../src/efsw/WatcherKqueue.hpp +../../src/efsw/WatcherInotify.hpp +../../src/efsw/WatcherGeneric.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/sophist.h +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/DirWatcherGeneric.hpp +../../src/efsw/Debug.hpp +../../src/efsw/base.hpp +../../src/efsw/WatcherKqueue.cpp +../../src/efsw/WatcherInotify.cpp +../../src/efsw/WatcherGeneric.cpp +../../src/efsw/Utf.inl +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/Log.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/DirWatcherGeneric.cpp +../../src/efsw/Debug.cpp +../../src/efsw/FileWatcherImpl.cpp +../../src/efsw/DirectorySnapshotDiff.hpp +../../src/efsw/DirectorySnapshot.hpp +../../src/efsw/DirectorySnapshotDiff.cpp +../../src/efsw/DirectorySnapshot.cpp +../../src/efsw/WatcherFSEvents.hpp +../../src/efsw/FileWatcherFSEvents.hpp +../../src/efsw/WatcherFSEvents.cpp +../../src/efsw/FileWatcherFSEvents.cpp +../../src/efsw/WatcherWin32.hpp +../../src/efsw/WatcherKqueue.hpp +../../src/efsw/WatcherInotify.hpp +../../src/efsw/WatcherGeneric.hpp +../../src/efsw/WatcherFSEvents.hpp +../../src/efsw/Watcher.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/sophist.h +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileWatcherFSEvents.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/DirWatcherGeneric.hpp +../../src/efsw/DirectorySnapshotDiff.hpp +../../src/efsw/DirectorySnapshot.hpp +../../src/efsw/Debug.hpp +../../src/efsw/base.hpp +../../src/efsw/WatcherWin32.cpp +../../src/efsw/WatcherKqueue.cpp +../../src/efsw/WatcherInotify.cpp +../../src/efsw/WatcherGeneric.cpp +../../src/efsw/WatcherFSEvents.cpp +../../src/efsw/Watcher.cpp +../../src/efsw/Utf.inl +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/Log.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherImpl.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcherFSEvents.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/DirWatcherGeneric.cpp +../../src/efsw/DirectorySnapshotDiff.cpp +../../src/efsw/DirectorySnapshot.cpp +../../src/efsw/Debug.cpp diff --git a/project/qtcreator-osx/efsw.includes b/project/qtcreator-osx/efsw.includes new file mode 100644 index 0000000..1f6e72e --- /dev/null +++ b/project/qtcreator-osx/efsw.includes @@ -0,0 +1,7 @@ +../../src +../../include +/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1 +/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.0/include +/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include +/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include +/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks diff --git a/project/qtcreator-win/efsw.cflags b/project/qtcreator-win/efsw.cflags new file mode 100644 index 0000000..68d5165 --- /dev/null +++ b/project/qtcreator-win/efsw.cflags @@ -0,0 +1 @@ +-std=c17 \ No newline at end of file diff --git a/project/qtcreator-win/efsw.config b/project/qtcreator-win/efsw.config new file mode 100644 index 0000000..8cec188 --- /dev/null +++ b/project/qtcreator-win/efsw.config @@ -0,0 +1 @@ +// ADD PREDEFINED MACROS HERE! diff --git a/project/qtcreator-win/efsw.creator b/project/qtcreator-win/efsw.creator new file mode 100644 index 0000000..e94cbbd --- /dev/null +++ b/project/qtcreator-win/efsw.creator @@ -0,0 +1 @@ +[General] diff --git a/project/qtcreator-win/efsw.creator.user b/project/qtcreator-win/efsw.creator.user new file mode 100644 index 0000000..deadd7e --- /dev/null +++ b/project/qtcreator-win/efsw.creator.user @@ -0,0 +1,211 @@ + + + + + + EnvironmentId + {55fc4913-4acc-49e6-b0d5-ebf25d4d498e} + + + ProjectExplorer.Project.ActiveTarget + 0 + + + ProjectExplorer.Project.EditorSettings + + true + false + true + + Cpp + + CppGlobal + + + + QmlJS + + QmlJSGlobal + + + 2 + UTF-8 + false + 4 + false + 80 + true + true + 1 + true + false + 0 + true + true + 0 + 8 + true + 1 + true + true + true + false + + + + ProjectExplorer.Project.PluginSettings + + + + ProjectExplorer.Project.Target.0 + + Desktop + Desktop + {eb5b6178-a7a7-439e-ab01-e63b057196a1} + 0 + 0 + 0 + + C:\programming\efsw\make\windows + + + + all + + false + + + false + true + Make + + GenericProjectManager.GenericMakeStep + + 1 + Build + + ProjectExplorer.BuildSteps.Build + + + + + clean + + true + + + false + true + Make + + GenericProjectManager.GenericMakeStep + + 1 + Clean + + ProjectExplorer.BuildSteps.Clean + + 2 + false + + Default + Default + GenericProjectManager.GenericBuildConfiguration + + 1 + + + 0 + Deploy + + ProjectExplorer.BuildSteps.Deploy + + 1 + Deploy locally + + ProjectExplorer.DefaultDeployConfiguration + + 1 + + + dwarf + + cpu-cycles + + + 250 + -F + true + 4096 + false + false + 1000 + + true + + false + false + false + false + true + 0.01 + 10 + true + kcachegrind + 1 + 25 + + 1 + true + false + true + valgrind + + 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + + 2 + + %{buildDir}\..\..\bin\efsw-test-debug.exe + Run C:\programming\efsw\bin\efsw-test-debug.exe + + ProjectExplorer.CustomExecutableRunConfiguration + + 3768 + false + true + false + false + true + %{buildDir} + + + 1 + + + + ProjectExplorer.Project.TargetCount + 1 + + + ProjectExplorer.Project.Updater.FileVersion + 22 + + + Version + 22 + + diff --git a/project/qtcreator-win/efsw.cxxflags b/project/qtcreator-win/efsw.cxxflags new file mode 100644 index 0000000..6435dfc --- /dev/null +++ b/project/qtcreator-win/efsw.cxxflags @@ -0,0 +1 @@ +-std=c++17 \ No newline at end of file diff --git a/project/qtcreator-win/efsw.files b/project/qtcreator-win/efsw.files new file mode 100644 index 0000000..8efe50d --- /dev/null +++ b/project/qtcreator-win/efsw.files @@ -0,0 +1,215 @@ +../../include/efsw/efsw.hpp +../../premake5.lua +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/Thread.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/System.cpp +../../src/efsw/platform/platformimpl.hpp +../../src/efsw/platform/posix/ThreadImpl.hpp +../../src/efsw/platform/posix/MutexImpl.hpp +../../src/efsw/platform/posix/SystemImpl.hpp +../../src/efsw/platform/posix/ThreadImpl.cpp +../../src/efsw/platform/posix/MutexImpl.cpp +../../src/efsw/platform/posix/SystemImpl.cpp +../../src/efsw/platform/win/ThreadImpl.hpp +../../src/efsw/platform/win/MutexImpl.hpp +../../src/efsw/platform/win/SystemImpl.hpp +../../src/efsw/platform/win/ThreadImpl.cpp +../../src/efsw/platform/win/MutexImpl.cpp +../../src/efsw/platform/win/SystemImpl.cpp +../../src/efsw/base.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/platform/posix/FileSystemImpl.hpp +../../src/efsw/platform/posix/FileSystemImpl.cpp +../../src/efsw/platform/win/FileSystemImpl.hpp +../../src/efsw/platform/win/FileSystemImpl.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/base.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/sophist.h +../../src/efsw/base.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/Utf.inl +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/test/efsw-test.cpp +../../src/efsw/WatcherKqueue.hpp +../../src/efsw/WatcherInotify.hpp +../../src/efsw/WatcherGeneric.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/DirWatcherGeneric.hpp +../../src/efsw/Debug.hpp +../../src/efsw/base.hpp +../../src/efsw/sophist.h +../../src/efsw/Utf.inl +../../src/efsw/WatcherKqueue.cpp +../../src/efsw/WatcherInotify.cpp +../../src/efsw/WatcherGeneric.cpp +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/Log.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/DirWatcherGeneric.cpp +../../src/efsw/Debug.cpp +../../premake4.lua +../../src/efsw/WatcherKqueue.hpp +../../src/efsw/WatcherInotify.hpp +../../src/efsw/WatcherGeneric.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/sophist.h +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/DirWatcherGeneric.hpp +../../src/efsw/Debug.hpp +../../src/efsw/base.hpp +../../src/efsw/Utf.inl +../../src/efsw/WatcherKqueue.cpp +../../src/efsw/WatcherInotify.cpp +../../src/efsw/WatcherGeneric.cpp +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/Log.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherImpl.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/DirWatcherGeneric.cpp +../../src/efsw/Debug.cpp +../../src/efsw/WatcherWin32.hpp +../../src/efsw/WatcherKqueue.hpp +../../src/efsw/WatcherInotify.hpp +../../src/efsw/WatcherGeneric.hpp +../../src/efsw/WatcherFSEvents.hpp +../../src/efsw/Watcher.hpp +../../src/efsw/Utf.hpp +../../src/efsw/Thread.hpp +../../src/efsw/System.hpp +../../src/efsw/String.hpp +../../src/efsw/sophist.h +../../src/efsw/Mutex.hpp +../../src/efsw/FileWatcherWin32.hpp +../../src/efsw/FileWatcherKqueue.hpp +../../src/efsw/FileWatcherInotify.hpp +../../src/efsw/FileWatcherImpl.hpp +../../src/efsw/FileWatcherGeneric.hpp +../../src/efsw/FileWatcherFSEvents.hpp +../../src/efsw/FileSystem.hpp +../../src/efsw/FileInfo.hpp +../../src/efsw/DirWatcherGeneric.hpp +../../src/efsw/DirectorySnapshotDiff.hpp +../../src/efsw/DirectorySnapshot.hpp +../../src/efsw/Debug.hpp +../../src/efsw/base.hpp +../../src/efsw/Utf.inl +../../src/efsw/WatcherWin32.cpp +../../src/efsw/WatcherKqueue.cpp +../../src/efsw/WatcherInotify.cpp +../../src/efsw/WatcherGeneric.cpp +../../src/efsw/WatcherFSEvents.cpp +../../src/efsw/Watcher.cpp +../../src/efsw/Thread.cpp +../../src/efsw/System.cpp +../../src/efsw/String.cpp +../../src/efsw/Mutex.cpp +../../src/efsw/Log.cpp +../../src/efsw/FileWatcherWin32.cpp +../../src/efsw/FileWatcherKqueue.cpp +../../src/efsw/FileWatcherInotify.cpp +../../src/efsw/FileWatcherImpl.cpp +../../src/efsw/FileWatcherGeneric.cpp +../../src/efsw/FileWatcherFSEvents.cpp +../../src/efsw/FileWatcher.cpp +../../src/efsw/FileSystem.cpp +../../src/efsw/FileInfo.cpp +../../src/efsw/DirWatcherGeneric.cpp +../../src/efsw/DirectorySnapshotDiff.cpp +../../src/efsw/DirectorySnapshot.cpp +../../src/efsw/Debug.cpp +../../include/efsw/efsw.h +../../src/efsw/FileWatcherCWrapper.cpp diff --git a/project/qtcreator-win/efsw.includes b/project/qtcreator-win/efsw.includes new file mode 100644 index 0000000..0eeab56 --- /dev/null +++ b/project/qtcreator-win/efsw.includes @@ -0,0 +1,2 @@ +../../src +../../include diff --git a/src/efsw/Atomic.hpp b/src/efsw/Atomic.hpp new file mode 100644 index 0000000..9015c60 --- /dev/null +++ b/src/efsw/Atomic.hpp @@ -0,0 +1,33 @@ +#ifndef EFSW_ATOMIC_BOOL_HPP +#define EFSW_ATOMIC_BOOL_HPP + +#include + +#include + +namespace efsw { + +template class Atomic { + public: + explicit Atomic( T set = false ) : set_( set ) {} + + Atomic& operator=( T set ) { + set_.store( set, std::memory_order_release ); + return *this; + } + + explicit operator T() const { + return set_.load( std::memory_order_acquire ); + } + + T load() const { + return set_.load( std::memory_order_acquire ); + } + + private: + std::atomic set_; +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/Debug.cpp b/src/efsw/Debug.cpp new file mode 100644 index 0000000..18cfd31 --- /dev/null +++ b/src/efsw/Debug.cpp @@ -0,0 +1,81 @@ +#include +#include + +#ifdef EFSW_COMPILER_MSVC +#define WIN32_LEAN_AND_MEAN +#include +#include +#endif + +#include +#include +#include + +namespace efsw { + +#ifdef DEBUG + +void efREPORT_ASSERT( const char* File, int Line, const char* Exp ) { +#ifdef EFSW_COMPILER_MSVC + _CrtDbgReport( _CRT_ASSERT, File, Line, "", Exp ); + + DebugBreak(); +#else + std::cout << "ASSERT: " << Exp << " file: " << File << " line: " << Line << std::endl; + +#if defined( EFSW_COMPILER_GCC ) && defined( EFSW_32BIT ) && !defined( EFSW_ARM ) + asm( "int3" ); +#else + assert( false ); +#endif +#endif +} + +void efPRINT( const char* format, ... ) { + char buf[2048]; + va_list args; + + va_start( args, format ); + +#ifdef EFSW_COMPILER_MSVC + _vsnprintf_s( buf, sizeof( buf ), sizeof( buf ) / sizeof( buf[0] ), format, args ); +#else + vsnprintf( buf, sizeof( buf ) / sizeof( buf[0] ), format, args ); +#endif + + va_end( args ); + +#ifdef EFSW_COMPILER_MSVC + OutputDebugStringA( buf ); +#else + std::cout << buf; +#endif +} + +void efPRINTC( unsigned int cond, const char* format, ... ) { + if ( 0 == cond ) + return; + + char buf[2048]; + va_list args; + + va_start( args, format ); + +#ifdef EFSW_COMPILER_MSVC + _vsnprintf_s( buf, efARRAY_SIZE( buf ), efARRAY_SIZE( buf ), format, args ); +#else + vsnprintf( buf, sizeof( buf ) / sizeof( buf[0] ), format, args ); +#endif + + va_end( args ); + +#ifdef EFSW_COMPILER_MSVC + OutputDebugStringA( buf ); +#else + std::cout << buf; +#endif +} + +#endif + +} // namespace efsw diff --git a/src/efsw/Debug.hpp b/src/efsw/Debug.hpp new file mode 100644 index 0000000..fefaec4 --- /dev/null +++ b/src/efsw/Debug.hpp @@ -0,0 +1,62 @@ +#ifndef EFSW_DEBUG_HPP +#define EFSW_DEBUG_HPP + +#include + +namespace efsw { + +#ifdef DEBUG + +void efREPORT_ASSERT( const char* File, const int Line, const char* Exp ); + +#define efASSERT( expr ) \ + if ( !( expr ) ) { \ + efREPORT_ASSERT( __FILE__, __LINE__, #expr ); \ + } +#define efASSERTM( expr, msg ) \ + if ( !( expr ) ) { \ + efREPORT_ASSERT( __FILE__, __LINE__, #msg ); \ + } + +void efPRINT( const char* format, ... ); +void efPRINTC( unsigned int cond, const char* format, ... ); + +#else + +#define efASSERT( expr ) +#define efASSERTM( expr, msg ) + +#ifndef EFSW_COMPILER_MSVC +#define efPRINT( format, args... ) \ + {} +#define efPRINTC( cond, format, args... ) \ + {} +#else +#define efPRINT +#define efPRINTC +#endif + +#endif + +#ifdef EFSW_VERBOSE +#define efDEBUG efPRINT +#define efDEBUGC efPRINTC +#else + +#ifndef EFSW_COMPILER_MSVC +#define efDEBUG( format, args... ) \ + {} +#define efDEBUGC( cond, format, args... ) \ + {} +#else +#define efDEBUG( ... ) \ + {} +#define efDEBUGC( ... ) \ + {} +#endif + +#endif + +} // namespace efsw + +#endif diff --git a/src/efsw/DirWatcherGeneric.cpp b/src/efsw/DirWatcherGeneric.cpp new file mode 100644 index 0000000..8b6bc8a --- /dev/null +++ b/src/efsw/DirWatcherGeneric.cpp @@ -0,0 +1,388 @@ +#include +#include +#include +#include + +namespace efsw { + +DirWatcherGeneric::DirWatcherGeneric( DirWatcherGeneric* parent, WatcherGeneric* ws, + const std::string& directory, bool recursive, + bool reportNewFiles ) : + Parent( parent ), Watch( ws ), Recursive( recursive ), Deleted( false ) { + resetDirectory( directory ); + + if ( !reportNewFiles ) { + DirSnap.scan(); + } else { + DirectorySnapshotDiff Diff = DirSnap.scan(); + + if ( Diff.changed() ) { + FileInfoList::iterator it; + + DiffIterator( FilesCreated ) { + handleAction( ( *it ).Filepath, Actions::Add ); + } + } + } +} + +DirWatcherGeneric::~DirWatcherGeneric() { + /// If the directory was deleted mark the files as deleted + if ( Deleted ) { + DirectorySnapshotDiff Diff = DirSnap.scan(); + + if ( !DirSnap.exists() ) { + FileInfoList::iterator it; + + DiffIterator( FilesDeleted ) { + handleAction( ( *it ).Filepath, Actions::Delete ); + } + + DiffIterator( DirsDeleted ) { + handleAction( ( *it ).Filepath, Actions::Delete ); + } + } + } + + DirWatchMap::iterator it = Directories.begin(); + + for ( ; it != Directories.end(); ++it ) { + if ( Deleted ) { + /// If the directory was deleted, mark the flag for file deletion + it->second->Deleted = true; + } + + efSAFE_DELETE( it->second ); + } +} + +void DirWatcherGeneric::resetDirectory( std::string directory ) { + std::string dir( directory ); + + /// Is this a recursive watch? + if ( Watch->Directory != directory ) { + if ( !( directory.size() && + ( directory.at( 0 ) == FileSystem::getOSSlash() || + directory.at( directory.size() - 1 ) == FileSystem::getOSSlash() ) ) ) { + /// Get the real directory + if ( NULL != Parent ) { + std::string parentPath( Parent->DirSnap.DirectoryInfo.Filepath ); + FileSystem::dirAddSlashAtEnd( parentPath ); + FileSystem::dirAddSlashAtEnd( directory ); + + dir = parentPath + directory; + } else { + efDEBUG( "resetDirectory(): Parent is NULL. Fatal error." ); + } + } + } + + DirSnap.setDirectoryInfo( dir ); +} + +void DirWatcherGeneric::handleAction( const std::string& filename, unsigned long action, + std::string oldFilename ) { + Watch->Listener->handleFileAction( Watch->ID, DirSnap.DirectoryInfo.Filepath, + FileSystem::fileNameFromPath( filename ), (Action)action, + oldFilename ); +} + +void DirWatcherGeneric::addChilds( bool reportNewFiles ) { + if ( Recursive ) { + /// Create the subdirectories watchers + std::string dir; + + for ( FileInfoMap::iterator it = DirSnap.Files.begin(); it != DirSnap.Files.end(); it++ ) { + if ( it->second.isDirectory() && it->second.isReadable() && + !FileSystem::isRemoteFS( it->second.Filepath ) ) { + /// Check if the directory is a symbolic link + std::string curPath; + std::string link( FileSystem::getLinkRealPath( it->second.Filepath, curPath ) ); + + dir = it->first; + + if ( "" != link ) { + /// Avoid adding symlinks directories if it's now enabled + if ( !Watch->WatcherImpl->mFileWatcher->followSymlinks() ) { + continue; + } + + /// If it's a symlink check if the realpath exists as a watcher, or + /// if the path is outside the current dir + if ( Watch->WatcherImpl->pathInWatches( link ) || + Watch->pathInWatches( link ) || + !Watch->WatcherImpl->linkAllowed( curPath, link ) ) { + continue; + } else { + dir = link; + } + } else { + if ( Watch->pathInWatches( dir ) || Watch->WatcherImpl->pathInWatches( dir ) ) { + continue; + } + } + + if ( reportNewFiles ) { + handleAction( dir, Actions::Add ); + } + + Directories[dir] = + new DirWatcherGeneric( this, Watch, dir, Recursive, reportNewFiles ); + + Directories[dir]->addChilds( reportNewFiles ); + } + } + } +} + +void DirWatcherGeneric::watch( bool reportOwnChange ) { + DirectorySnapshotDiff Diff = DirSnap.scan(); + + if ( reportOwnChange && Diff.DirChanged && NULL != Parent ) { + Watch->Listener->handleFileAction( + Watch->ID, FileSystem::pathRemoveFileName( DirSnap.DirectoryInfo.Filepath ), + FileSystem::fileNameFromPath( DirSnap.DirectoryInfo.Filepath ), Actions::Modified ); + } + + if ( Diff.changed() ) { + FileInfoList::iterator it; + MovedList::iterator mit; + + /// Files + DiffIterator( FilesCreated ) { + handleAction( ( *it ).Filepath, Actions::Add ); + } + + DiffIterator( FilesModified ) { + handleAction( ( *it ).Filepath, Actions::Modified ); + } + + DiffIterator( FilesDeleted ) { + handleAction( ( *it ).Filepath, Actions::Delete ); + } + + DiffMovedIterator( FilesMoved ) { + handleAction( ( *mit ).second.Filepath, Actions::Moved, ( *mit ).first ); + } + + /// Directories + DiffIterator( DirsCreated ) { + createDirectory( ( *it ).Filepath ); + } + + DiffIterator( DirsModified ) { + handleAction( ( *it ).Filepath, Actions::Modified ); + } + + DiffIterator( DirsDeleted ) { + handleAction( ( *it ).Filepath, Actions::Delete ); + removeDirectory( ( *it ).Filepath ); + } + + DiffMovedIterator( DirsMoved ) { + handleAction( ( *mit ).second.Filepath, Actions::Moved, ( *mit ).first ); + moveDirectory( ( *mit ).first, ( *mit ).second.Filepath ); + } + } + + /// Process the subdirectories looking for changes + for ( DirWatchMap::iterator dit = Directories.begin(); dit != Directories.end(); ++dit ) { + /// Just watch + dit->second->watch(); + } +} + +void DirWatcherGeneric::watchDir( std::string& dir ) { + DirWatcherGeneric* watcher = Watch->WatcherImpl->mFileWatcher->allowOutOfScopeLinks() + ? findDirWatcher( dir ) + : findDirWatcherFast( dir ); + + if ( NULL != watcher ) { + watcher->watch( true ); + } +} + +DirWatcherGeneric* DirWatcherGeneric::findDirWatcherFast( std::string dir ) { + // remove the common base ( dir should always start with the same base as the watcher ) + efASSERT( !dir.empty() ); + efASSERT( dir.size() >= DirSnap.DirectoryInfo.Filepath.size() ); + efASSERT( DirSnap.DirectoryInfo.Filepath == + dir.substr( 0, DirSnap.DirectoryInfo.Filepath.size() ) ); + + if ( dir.size() >= DirSnap.DirectoryInfo.Filepath.size() ) { + dir = dir.substr( DirSnap.DirectoryInfo.Filepath.size() - 1 ); + } + + if ( dir.size() == 1 ) { + efASSERT( dir[0] == FileSystem::getOSSlash() ); + return this; + } + + size_t level = 0; + std::vector dirv = String::split( dir, FileSystem::getOSSlash(), false ); + + DirWatcherGeneric* watcher = this; + + while ( level < dirv.size() ) { + // search the dir level in the current watcher + DirWatchMap::iterator it = watcher->Directories.find( dirv[level] ); + + // found? continue with the next level + if ( it != watcher->Directories.end() ) { + watcher = it->second; + + level++; + } else { + // couldn't found the folder level? + // directory not watched + return NULL; + } + } + + return watcher; +} + +DirWatcherGeneric* DirWatcherGeneric::findDirWatcher( std::string dir ) { + if ( DirSnap.DirectoryInfo.Filepath == dir ) { + return this; + } else { + DirWatcherGeneric* watcher = NULL; + + for ( DirWatchMap::iterator it = Directories.begin(); it != Directories.end(); ++it ) { + watcher = it->second->findDirWatcher( dir ); + + if ( NULL != watcher ) { + return watcher; + } + } + } + + return NULL; +} + +DirWatcherGeneric* DirWatcherGeneric::createDirectory( std::string newdir ) { + FileSystem::dirRemoveSlashAtEnd( newdir ); + newdir = FileSystem::fileNameFromPath( newdir ); + + DirWatcherGeneric* dw = NULL; + + /// Check if the directory is a symbolic link + std::string parentPath( DirSnap.DirectoryInfo.Filepath ); + FileSystem::dirAddSlashAtEnd( parentPath ); + std::string dir( parentPath + newdir ); + + FileSystem::dirAddSlashAtEnd( dir ); + + FileInfo fi( dir ); + + if ( !fi.isDirectory() || !fi.isReadable() || FileSystem::isRemoteFS( dir ) ) { + return NULL; + } + + std::string curPath; + std::string link( FileSystem::getLinkRealPath( dir, curPath ) ); + bool skip = false; + + if ( "" != link ) { + /// Avoid adding symlinks directories if it's now enabled + if ( !Watch->WatcherImpl->mFileWatcher->followSymlinks() ) { + skip = true; + } + + /// If it's a symlink check if the realpath exists as a watcher, or + /// if the path is outside the current dir + if ( Watch->WatcherImpl->pathInWatches( link ) || Watch->pathInWatches( link ) || + !Watch->WatcherImpl->linkAllowed( curPath, link ) ) { + skip = true; + } else { + dir = link; + } + } else { + if ( Watch->pathInWatches( dir ) || Watch->WatcherImpl->pathInWatches( dir ) ) { + skip = true; + } + } + + if ( !skip ) { + handleAction( newdir, Actions::Add ); + + /// Creates the new directory watcher of the subfolder and check for new files + dw = new DirWatcherGeneric( this, Watch, dir, Recursive ); + + dw->addChilds(); + + dw->watch(); + + /// Add it to the list of directories + Directories[newdir] = dw; + } + + return dw; +} + +void DirWatcherGeneric::removeDirectory( std::string dir ) { + FileSystem::dirRemoveSlashAtEnd( dir ); + dir = FileSystem::fileNameFromPath( dir ); + + DirWatcherGeneric* dw = NULL; + DirWatchMap::iterator dit; + + /// Folder deleted + + /// Search the folder, it should exists + dit = Directories.find( dir ); + + if ( dit != Directories.end() ) { + dw = dit->second; + + /// Flag it as deleted so it fire the event for every file inside deleted + dw->Deleted = true; + + /// Delete the DirWatcherGeneric + efSAFE_DELETE( dw ); + + /// Remove the directory from the map + Directories.erase( dit->first ); + } +} + +void DirWatcherGeneric::moveDirectory( std::string oldDir, std::string newDir ) { + FileSystem::dirRemoveSlashAtEnd( oldDir ); + oldDir = FileSystem::fileNameFromPath( oldDir ); + + FileSystem::dirRemoveSlashAtEnd( newDir ); + newDir = FileSystem::fileNameFromPath( newDir ); + + DirWatcherGeneric* dw = NULL; + DirWatchMap::iterator dit; + + /// Directory existed? + dit = Directories.find( oldDir ); + + if ( dit != Directories.end() ) { + dw = dit->second; + + /// Remove the directory from the map + Directories.erase( dit->first ); + + Directories[newDir] = dw; + + dw->resetDirectory( newDir ); + } +} + +bool DirWatcherGeneric::pathInWatches( std::string path ) { + if ( DirSnap.DirectoryInfo.Filepath == path ) { + return true; + } + + for ( DirWatchMap::iterator it = Directories.begin(); it != Directories.end(); ++it ) { + if ( it->second->pathInWatches( path ) ) { + return true; + } + } + + return false; +} + +} // namespace efsw diff --git a/src/efsw/DirWatcherGeneric.hpp b/src/efsw/DirWatcherGeneric.hpp new file mode 100644 index 0000000..ca52de7 --- /dev/null +++ b/src/efsw/DirWatcherGeneric.hpp @@ -0,0 +1,57 @@ +#ifndef EFSW_DIRWATCHERGENERIC_HPP +#define EFSW_DIRWATCHERGENERIC_HPP + +#include +#include +#include +#include + +namespace efsw { + +class DirWatcherGeneric { + public: + typedef std::map DirWatchMap; + + DirWatcherGeneric* Parent; + WatcherGeneric* Watch; + DirectorySnapshot DirSnap; + DirWatchMap Directories; + bool Recursive; + + DirWatcherGeneric( DirWatcherGeneric* parent, WatcherGeneric* ws, const std::string& directory, + bool recursive, bool reportNewFiles = false ); + + ~DirWatcherGeneric(); + + void watch( bool reportOwnChange = false ); + + void watchDir( std::string& dir ); + + static bool isDir( const std::string& directory ); + + bool pathInWatches( std::string path ); + + void addChilds( bool reportNewFiles = true ); + + DirWatcherGeneric* findDirWatcher( std::string dir ); + + DirWatcherGeneric* findDirWatcherFast( std::string dir ); + + protected: + bool Deleted; + + DirWatcherGeneric* createDirectory( std::string newdir ); + + void removeDirectory( std::string dir ); + + void moveDirectory( std::string oldDir, std::string newDir ); + + void resetDirectory( std::string directory ); + + void handleAction( const std::string& filename, unsigned long action, + std::string oldFilename = "" ); +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/DirectorySnapshot.cpp b/src/efsw/DirectorySnapshot.cpp new file mode 100644 index 0000000..f78475f --- /dev/null +++ b/src/efsw/DirectorySnapshot.cpp @@ -0,0 +1,212 @@ +#include +#include + +namespace efsw { + +DirectorySnapshot::DirectorySnapshot() {} + +DirectorySnapshot::DirectorySnapshot( std::string directory ) { + init( directory ); +} + +DirectorySnapshot::~DirectorySnapshot() {} + +void DirectorySnapshot::init( std::string directory ) { + setDirectoryInfo( directory ); + initFiles(); +} + +bool DirectorySnapshot::exists() { + return DirectoryInfo.exists(); +} + +void DirectorySnapshot::deleteAll( DirectorySnapshotDiff& Diff ) { + FileInfo fi; + + for ( FileInfoMap::iterator it = Files.begin(); it != Files.end(); it++ ) { + fi = it->second; + + if ( fi.isDirectory() ) { + Diff.DirsDeleted.push_back( fi ); + } else { + Diff.FilesDeleted.push_back( fi ); + } + } + + Files.clear(); +} + +void DirectorySnapshot::setDirectoryInfo( std::string directory ) { + DirectoryInfo = FileInfo( directory ); +} + +void DirectorySnapshot::initFiles() { + Files = FileSystem::filesInfoFromPath( DirectoryInfo.Filepath ); + + FileInfoMap::iterator it = Files.begin(); + std::vector eraseFiles; + + /// Remove all non regular files and non directories + for ( ; it != Files.end(); it++ ) { + if ( !it->second.isRegularFile() && !it->second.isDirectory() ) { + eraseFiles.push_back( it->first ); + } + } + + for ( std::vector::iterator eit = eraseFiles.begin(); eit != eraseFiles.end(); + eit++ ) { + Files.erase( *eit ); + } +} + +DirectorySnapshotDiff DirectorySnapshot::scan() { + DirectorySnapshotDiff Diff; + + Diff.clear(); + + FileInfo curFI( DirectoryInfo.Filepath ); + + Diff.DirChanged = DirectoryInfo != curFI; + + if ( Diff.DirChanged ) { + DirectoryInfo = curFI; + } + + /// If the directory was erased, create the events for files and directories deletion + if ( !curFI.exists() ) { + deleteAll( Diff ); + + return Diff; + } + + FileInfoMap files = FileSystem::filesInfoFromPath( DirectoryInfo.Filepath ); + + if ( files.empty() && Files.empty() ) { + return Diff; + } + + FileInfo fi; + FileInfoMap FilesCpy; + FileInfoMap::iterator it; + FileInfoMap::iterator fiIt; + + if ( Diff.DirChanged ) { + FilesCpy = Files; + } + + for ( it = files.begin(); it != files.end(); it++ ) { + fi = it->second; + + /// File existed before? + fiIt = Files.find( it->first ); + + if ( fiIt != Files.end() ) { + /// Erase from the file list copy + FilesCpy.erase( it->first ); + + /// File changed? + if ( ( *fiIt ).second != fi ) { + /// Update the new file info + Files[it->first] = fi; + + /// handle modified event + if ( fi.isDirectory() ) { + Diff.DirsModified.push_back( fi ); + } else { + Diff.FilesModified.push_back( fi ); + } + } + } + /// Only add regular files or directories + else if ( fi.isRegularFile() || fi.isDirectory() ) { + /// New file found + Files[it->first] = fi; + + FileInfoMap::iterator fit; + std::string oldFile = ""; + + /// Check if the same inode already existed + if ( ( fit = nodeInFiles( fi ) ) != Files.end() ) { + oldFile = fit->first; + + /// Avoid firing a Delete event + FilesCpy.erase( fit->first ); + + /// Delete the old file name + Files.erase( fit->first ); + + if ( fi.isDirectory() ) { + Diff.DirsMoved.push_back( std::make_pair( oldFile, fi ) ); + } else { + Diff.FilesMoved.push_back( std::make_pair( oldFile, fi ) ); + } + } else { + if ( fi.isDirectory() ) { + Diff.DirsCreated.push_back( fi ); + } else { + Diff.FilesCreated.push_back( fi ); + } + } + } + } + + if ( !Diff.DirChanged ) { + return Diff; + } + + /// The files or directories that remains were deleted + for ( it = FilesCpy.begin(); it != FilesCpy.end(); it++ ) { + fi = it->second; + + if ( fi.isDirectory() ) { + Diff.DirsDeleted.push_back( fi ); + } else { + Diff.FilesDeleted.push_back( fi ); + } + + /// Remove the file or directory from the list of files + Files.erase( it->first ); + } + + return Diff; +} + +FileInfoMap::iterator DirectorySnapshot::nodeInFiles( FileInfo& fi ) { + FileInfoMap::iterator it; + + if ( FileInfo::inodeSupported() ) { + for ( it = Files.begin(); it != Files.end(); it++ ) { + if ( it->second.sameInode( fi ) && it->second.Filepath != fi.Filepath ) { + return it; + } + } + } + + return Files.end(); +} + +void DirectorySnapshot::addFile( std::string path ) { + std::string name( FileSystem::fileNameFromPath( path ) ); + Files[name] = FileInfo( path ); +} + +void DirectorySnapshot::removeFile( std::string path ) { + std::string name( FileSystem::fileNameFromPath( path ) ); + + FileInfoMap::iterator it = Files.find( name ); + + if ( Files.end() != it ) { + Files.erase( it ); + } +} + +void DirectorySnapshot::moveFile( std::string oldPath, std::string newPath ) { + removeFile( oldPath ); + addFile( newPath ); +} + +void DirectorySnapshot::updateFile( std::string path ) { + addFile( path ); +} + +} // namespace efsw diff --git a/src/efsw/DirectorySnapshot.hpp b/src/efsw/DirectorySnapshot.hpp new file mode 100644 index 0000000..0e60542 --- /dev/null +++ b/src/efsw/DirectorySnapshot.hpp @@ -0,0 +1,45 @@ +#ifndef EFSW_DIRECTORYSNAPSHOT_HPP +#define EFSW_DIRECTORYSNAPSHOT_HPP + +#include + +namespace efsw { + +class DirectorySnapshot { + public: + FileInfo DirectoryInfo; + FileInfoMap Files; + + void setDirectoryInfo( std::string directory ); + + DirectorySnapshot(); + + DirectorySnapshot( std::string directory ); + + ~DirectorySnapshot(); + + void init( std::string directory ); + + bool exists(); + + DirectorySnapshotDiff scan(); + + FileInfoMap::iterator nodeInFiles( FileInfo& fi ); + + void addFile( std::string path ); + + void removeFile( std::string path ); + + void moveFile( std::string oldPath, std::string newPath ); + + void updateFile( std::string path ); + + protected: + void initFiles(); + + void deleteAll( DirectorySnapshotDiff& Diff ); +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/DirectorySnapshotDiff.cpp b/src/efsw/DirectorySnapshotDiff.cpp new file mode 100644 index 0000000..37ee507 --- /dev/null +++ b/src/efsw/DirectorySnapshotDiff.cpp @@ -0,0 +1,22 @@ +#include + +namespace efsw { + +void DirectorySnapshotDiff::clear() { + FilesCreated.clear(); + FilesModified.clear(); + FilesMoved.clear(); + FilesDeleted.clear(); + DirsCreated.clear(); + DirsModified.clear(); + DirsMoved.clear(); + DirsDeleted.clear(); +} + +bool DirectorySnapshotDiff::changed() { + return !FilesCreated.empty() || !FilesModified.empty() || !FilesMoved.empty() || + !FilesDeleted.empty() || !DirsCreated.empty() || !DirsModified.empty() || + !DirsMoved.empty() || !DirsDeleted.empty(); +} + +} // namespace efsw diff --git a/src/efsw/DirectorySnapshotDiff.hpp b/src/efsw/DirectorySnapshotDiff.hpp new file mode 100644 index 0000000..26a29ec --- /dev/null +++ b/src/efsw/DirectorySnapshotDiff.hpp @@ -0,0 +1,35 @@ +#ifndef EFSW_DIRECTORYSNAPSHOTDIFF_HPP +#define EFSW_DIRECTORYSNAPSHOTDIFF_HPP + +#include + +namespace efsw { + +class DirectorySnapshotDiff { + public: + FileInfoList FilesDeleted; + FileInfoList FilesCreated; + FileInfoList FilesModified; + MovedList FilesMoved; + FileInfoList DirsDeleted; + FileInfoList DirsCreated; + FileInfoList DirsModified; + MovedList DirsMoved; + bool DirChanged; + + void clear(); + + bool changed(); +}; + +#define DiffIterator( FileInfoListName ) \ + it = Diff.FileInfoListName.begin(); \ + for ( ; it != Diff.FileInfoListName.end(); it++ ) + +#define DiffMovedIterator( MovedListName ) \ + mit = Diff.MovedListName.begin(); \ + for ( ; mit != Diff.MovedListName.end(); mit++ ) + +} // namespace efsw + +#endif diff --git a/src/efsw/FileInfo.cpp b/src/efsw/FileInfo.cpp new file mode 100644 index 0000000..707f617 --- /dev/null +++ b/src/efsw/FileInfo.cpp @@ -0,0 +1,240 @@ +#include +#include +#include + +#ifndef _DARWIN_FEATURE_64_BIT_INODE +#define _DARWIN_FEATURE_64_BIT_INODE +#endif + +#ifndef _FILE_OFFSET_BITS +#define _FILE_OFFSET_BITS 64 +#endif + +#include + +#include +#include + +#ifdef EFSW_COMPILER_MSVC +#ifndef S_ISDIR +#define S_ISDIR( f ) ( (f)&_S_IFDIR ) +#endif + +#ifndef S_ISREG +#define S_ISREG( f ) ( (f)&_S_IFREG ) +#endif + +#ifndef S_ISRDBL +#define S_ISRDBL( f ) ( (f)&_S_IREAD ) +#endif +#else +#include + +#ifndef S_ISRDBL +#define S_ISRDBL( f ) ( (f)&S_IRUSR ) +#endif +#endif + +namespace efsw { + +bool FileInfo::exists( const std::string& filePath ) { + FileInfo fi( filePath ); + return fi.exists(); +} + +bool FileInfo::isLink( const std::string& filePath ) { + FileInfo fi( filePath, true ); + return fi.isLink(); +} + +bool FileInfo::inodeSupported() { +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 + return true; +#else + return false; +#endif +} + +FileInfo::FileInfo() : + ModificationTime( 0 ), OwnerId( 0 ), GroupId( 0 ), Permissions( 0 ), Inode( 0 ) {} + +FileInfo::FileInfo( const std::string& filepath ) : + Filepath( filepath ), + ModificationTime( 0 ), + OwnerId( 0 ), + GroupId( 0 ), + Permissions( 0 ), + Inode( 0 ) { + getInfo(); +} + +FileInfo::FileInfo( const std::string& filepath, bool linkInfo ) : + Filepath( filepath ), + ModificationTime( 0 ), + OwnerId( 0 ), + GroupId( 0 ), + Permissions( 0 ), + Inode( 0 ) { + if ( linkInfo ) { + getRealInfo(); + } else { + getInfo(); + } +} + +void FileInfo::getInfo() { +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + if ( Filepath.size() == 3 && Filepath[1] == ':' && Filepath[2] == FileSystem::getOSSlash() ) { + Filepath += FileSystem::getOSSlash(); + } +#endif + + /// Why i'm doing this? stat in mingw32 doesn't work for directories if the dir path ends with a + /// path slash + bool slashAtEnd = FileSystem::slashAtEnd( Filepath ); + + if ( slashAtEnd ) { + FileSystem::dirRemoveSlashAtEnd( Filepath ); + } + +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 + struct stat st; + int res = stat( Filepath.c_str(), &st ); +#else + struct _stat st; + int res = _wstat( String::fromUtf8( Filepath ).toWideString().c_str(), &st ); +#endif + + if ( 0 == res ) { + ModificationTime = st.st_mtime; + Size = st.st_size; + OwnerId = st.st_uid; + GroupId = st.st_gid; + Permissions = st.st_mode; + Inode = st.st_ino; + } + + if ( slashAtEnd ) { + FileSystem::dirAddSlashAtEnd( Filepath ); + } +} + +void FileInfo::getRealInfo() { + bool slashAtEnd = FileSystem::slashAtEnd( Filepath ); + + if ( slashAtEnd ) { + FileSystem::dirRemoveSlashAtEnd( Filepath ); + } + +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 + struct stat st; + int res = lstat( Filepath.c_str(), &st ); +#else + struct _stat st; + int res = _wstat( String::fromUtf8( Filepath ).toWideString().c_str(), &st ); +#endif + + if ( 0 == res ) { + ModificationTime = st.st_mtime; + Size = st.st_size; + OwnerId = st.st_uid; + GroupId = st.st_gid; + Permissions = st.st_mode; + Inode = st.st_ino; + } + + if ( slashAtEnd ) { + FileSystem::dirAddSlashAtEnd( Filepath ); + } +} + +bool FileInfo::operator==( const FileInfo& Other ) const { + return ( ModificationTime == Other.ModificationTime && Size == Other.Size && + OwnerId == Other.OwnerId && GroupId == Other.GroupId && + Permissions == Other.Permissions && Inode == Other.Inode ); +} + +bool FileInfo::isDirectory() const { + return 0 != S_ISDIR( Permissions ); +} + +bool FileInfo::isRegularFile() const { + return 0 != S_ISREG( Permissions ); +} + +bool FileInfo::isReadable() const { +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 + static bool isRoot = getuid() == 0; + return isRoot || 0 != S_ISRDBL( Permissions ); +#else + return 0 != S_ISRDBL( Permissions ); +#endif +} + +bool FileInfo::isLink() const { +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 + return S_ISLNK( Permissions ); +#else + return false; +#endif +} + +std::string FileInfo::linksTo() { +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 + if ( isLink() ) { + char* ch = realpath( Filepath.c_str(), NULL ); + + if ( NULL != ch ) { + std::string tstr( ch ); + + free( ch ); + + return tstr; + } + } +#endif + return std::string( "" ); +} + +bool FileInfo::exists() { + bool slashAtEnd = FileSystem::slashAtEnd( Filepath ); + + if ( slashAtEnd ) { + FileSystem::dirRemoveSlashAtEnd( Filepath ); + } + +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 + struct stat st; + int res = stat( Filepath.c_str(), &st ); +#else + struct _stat st; + int res = _wstat( String::fromUtf8( Filepath ).toWideString().c_str(), &st ); +#endif + + if ( slashAtEnd ) { + FileSystem::dirAddSlashAtEnd( Filepath ); + } + + return 0 == res; +} + +FileInfo& FileInfo::operator=( const FileInfo& Other ) { + this->Filepath = Other.Filepath; + this->Size = Other.Size; + this->ModificationTime = Other.ModificationTime; + this->GroupId = Other.GroupId; + this->OwnerId = Other.OwnerId; + this->Permissions = Other.Permissions; + this->Inode = Other.Inode; + return *this; +} + +bool FileInfo::sameInode( const FileInfo& Other ) const { + return inodeSupported() && Inode == Other.Inode; +} + +bool FileInfo::operator!=( const FileInfo& Other ) const { + return !( *this == Other ); +} + +} // namespace efsw diff --git a/src/efsw/FileInfo.hpp b/src/efsw/FileInfo.hpp new file mode 100644 index 0000000..1aca2a8 --- /dev/null +++ b/src/efsw/FileInfo.hpp @@ -0,0 +1,64 @@ +#ifndef EFSW_FILEINFO_HPP +#define EFSW_FILEINFO_HPP + +#include +#include +#include +#include + +namespace efsw { + +class FileInfo { + public: + static bool exists( const std::string& filePath ); + + static bool isLink( const std::string& filePath ); + + static bool inodeSupported(); + + FileInfo(); + + FileInfo( const std::string& filepath ); + + FileInfo( const std::string& filepath, bool linkInfo ); + + bool operator==( const FileInfo& Other ) const; + + bool operator!=( const FileInfo& Other ) const; + + FileInfo& operator=( const FileInfo& Other ); + + bool isDirectory() const; + + bool isRegularFile() const; + + bool isReadable() const; + + bool sameInode( const FileInfo& Other ) const; + + bool isLink() const; + + std::string linksTo(); + + bool exists(); + + void getInfo(); + + void getRealInfo(); + + std::string Filepath; + Uint64 ModificationTime; + Uint64 Size; + Uint32 OwnerId; + Uint32 GroupId; + Uint32 Permissions; + Uint64 Inode; +}; + +typedef std::map FileInfoMap; +typedef std::vector FileInfoList; +typedef std::vector> MovedList; + +} // namespace efsw + +#endif diff --git a/src/efsw/FileSystem.cpp b/src/efsw/FileSystem.cpp new file mode 100644 index 0000000..1ed346c --- /dev/null +++ b/src/efsw/FileSystem.cpp @@ -0,0 +1,161 @@ +#include +#include +#include +#include + +#if EFSW_OS == EFSW_OS_MACOSX +#include +#endif + +#if EFSW_OS == EFSW_OS_WIN +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#include +#endif + +namespace efsw { + +bool FileSystem::isDirectory( const std::string& path ) { + return Platform::FileSystem::isDirectory( path ); +} + +FileInfoMap FileSystem::filesInfoFromPath( std::string path ) { + dirAddSlashAtEnd( path ); + + return Platform::FileSystem::filesInfoFromPath( path ); +} + +char FileSystem::getOSSlash() { + return Platform::FileSystem::getOSSlash(); +} + +bool FileSystem::slashAtEnd( std::string& dir ) { + return ( dir.size() && dir[dir.size() - 1] == getOSSlash() ); +} + +void FileSystem::dirAddSlashAtEnd( std::string& dir ) { + if ( dir.size() >= 1 && dir[dir.size() - 1] != getOSSlash() ) { + dir.push_back( getOSSlash() ); + } +} + +void FileSystem::dirRemoveSlashAtEnd( std::string& dir ) { + if ( dir.size() >= 1 && dir[dir.size() - 1] == getOSSlash() ) { + dir.erase( dir.size() - 1 ); + } +} + +std::string FileSystem::fileNameFromPath( std::string filepath ) { + dirRemoveSlashAtEnd( filepath ); + + size_t pos = filepath.find_last_of( getOSSlash() ); + + if ( pos != std::string::npos ) { + return filepath.substr( pos + 1 ); + } + + return filepath; +} + +std::string FileSystem::pathRemoveFileName( std::string filepath ) { + dirRemoveSlashAtEnd( filepath ); + + size_t pos = filepath.find_last_of( getOSSlash() ); + + if ( pos != std::string::npos ) { + return filepath.substr( 0, pos + 1 ); + } + + return filepath; +} + +std::string FileSystem::getLinkRealPath( std::string dir, std::string& curPath ) { + FileSystem::dirRemoveSlashAtEnd( dir ); + FileInfo fi( dir, true ); + + /// Check with lstat and see if it's a link + if ( fi.isLink() ) { + /// get the real path of the link + std::string link( fi.linksTo() ); + + /// get the current path of the directory without the link dir path + curPath = FileSystem::pathRemoveFileName( dir ); + + /// ensure that ends with the os directory slash + FileSystem::dirAddSlashAtEnd( link ); + + return link; + } + + /// if it's not a link return nothing + return ""; +} + +std::string FileSystem::precomposeFileName( const std::string& name ) { +#if EFSW_OS == EFSW_OS_MACOSX + CFStringRef cfStringRef = + CFStringCreateWithCString( kCFAllocatorDefault, name.c_str(), kCFStringEncodingUTF8 ); + CFMutableStringRef cfMutable = CFStringCreateMutableCopy( NULL, 0, cfStringRef ); + + CFStringNormalize( cfMutable, kCFStringNormalizationFormC ); + + const char* c_str = CFStringGetCStringPtr( cfMutable, kCFStringEncodingUTF8 ); + if ( c_str != NULL ) { + std::string result( c_str ); + CFRelease( cfStringRef ); + CFRelease( cfMutable ); + return result; + } + CFIndex length = CFStringGetLength( cfMutable ); + CFIndex maxSize = CFStringGetMaximumSizeForEncoding( length, kCFStringEncodingUTF8 ); + if ( maxSize == kCFNotFound ) { + CFRelease( cfStringRef ); + CFRelease( cfMutable ); + return std::string(); + } + + std::string result( maxSize + 1, '\0' ); + if ( CFStringGetCString( cfMutable, &result[0], result.size(), kCFStringEncodingUTF8 ) ) { + result.resize( std::strlen( result.c_str() ) ); + CFRelease( cfStringRef ); + CFRelease( cfMutable ); + } else { + result.clear(); + } + return result; +#else + return name; +#endif +} + +bool FileSystem::isRemoteFS( const std::string& directory ) { + return Platform::FileSystem::isRemoteFS( directory ); +} + +bool FileSystem::changeWorkingDirectory( const std::string& directory ) { + return Platform::FileSystem::changeWorkingDirectory( directory ); +} + +std::string FileSystem::getCurrentWorkingDirectory() { + return Platform::FileSystem::getCurrentWorkingDirectory(); +} + +std::string FileSystem::getRealPath( const std::string& path ) { + std::string realPath; +#if defined( EFSW_PLATFORM_POSIX ) + char dir[PATH_MAX]; + realpath( path.c_str(), &dir[0] ); + realPath = std::string( dir ); +#elif EFSW_OS == EFSW_OS_WIN + wchar_t dir[_MAX_PATH + 1]; + GetFullPathNameW( String::fromUtf8( path ).toWideString().c_str(), _MAX_PATH, &dir[0], + nullptr ); + realPath = String( dir ).toUtf8(); +#else +#warning FileSystem::getRealPath() not implemented on this platform. +#endif + return realPath; +} + +} // namespace efsw diff --git a/src/efsw/FileSystem.hpp b/src/efsw/FileSystem.hpp new file mode 100644 index 0000000..1d66ece --- /dev/null +++ b/src/efsw/FileSystem.hpp @@ -0,0 +1,43 @@ +#ifndef EFSW_FILESYSTEM_HPP +#define EFSW_FILESYSTEM_HPP + +#include +#include + +namespace efsw { + +class FileSystem { + public: + static bool isDirectory( const std::string& path ); + + static FileInfoMap filesInfoFromPath( std::string path ); + + static char getOSSlash(); + + static bool slashAtEnd( std::string& dir ); + + static void dirAddSlashAtEnd( std::string& dir ); + + static void dirRemoveSlashAtEnd( std::string& dir ); + + static std::string fileNameFromPath( std::string filepath ); + + static std::string pathRemoveFileName( std::string filepath ); + + static std::string getLinkRealPath( std::string dir, std::string& curPath ); + + static std::string precomposeFileName( const std::string& name ); + + static bool isRemoteFS( const std::string& directory ); + + static bool changeWorkingDirectory( const std::string& path ); + + static std::string getCurrentWorkingDirectory(); + + static std::string getRealPath( const std::string& path ); + +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/FileWatcher.cpp b/src/efsw/FileWatcher.cpp new file mode 100644 index 0000000..f45b243 --- /dev/null +++ b/src/efsw/FileWatcher.cpp @@ -0,0 +1,120 @@ +#include +#include +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 +#include +#define FILEWATCHER_IMPL FileWatcherWin32 +#define BACKEND_NAME "Win32" +#elif EFSW_PLATFORM == EFSW_PLATFORM_INOTIFY +#include +#define FILEWATCHER_IMPL FileWatcherInotify +#define BACKEND_NAME "Inotify" +#elif EFSW_PLATFORM == EFSW_PLATFORM_KQUEUE +#include +#define FILEWATCHER_IMPL FileWatcherKqueue +#define BACKEND_NAME "Kqueue" +#elif EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS +#include +#define FILEWATCHER_IMPL FileWatcherFSEvents +#define BACKEND_NAME "FSEvents" +#else +#define FILEWATCHER_IMPL FileWatcherGeneric +#define BACKEND_NAME "Generic" +#endif + +#include + +namespace efsw { + +FileWatcher::FileWatcher() : mFollowSymlinks( false ), mOutOfScopeLinks( false ) { + efDEBUG( "Using backend: %s\n", BACKEND_NAME ); + + mImpl = new FILEWATCHER_IMPL( this ); + + if ( !mImpl->initOK() ) { + efSAFE_DELETE( mImpl ); + + efDEBUG( "Falled back to backend: %s\n", BACKEND_NAME ); + + mImpl = new FileWatcherGeneric( this ); + } +} + +FileWatcher::FileWatcher( bool useGenericFileWatcher ) : + mFollowSymlinks( false ), mOutOfScopeLinks( false ) { + if ( useGenericFileWatcher ) { + efDEBUG( "Using backend: Generic\n" ); + + mImpl = new FileWatcherGeneric( this ); + } else { + efDEBUG( "Using backend: %s\n", BACKEND_NAME ); + + mImpl = new FILEWATCHER_IMPL( this ); + + if ( !mImpl->initOK() ) { + efSAFE_DELETE( mImpl ); + + efDEBUG( "Falled back to backend: %s\n", BACKEND_NAME ); + + mImpl = new FileWatcherGeneric( this ); + } + } +} + +FileWatcher::~FileWatcher() { + efSAFE_DELETE( mImpl ); +} + +WatchID FileWatcher::addWatch( const std::string& directory, FileWatchListener* watcher ) { + return addWatch( directory, watcher, false, {} ); +} + +WatchID FileWatcher::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive ) { + return addWatch( directory, watcher, recursive, {} ); +} + +WatchID FileWatcher::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, const std::vector& options ) { + if ( mImpl->mIsGeneric || !FileSystem::isRemoteFS( directory ) ) { + return mImpl->addWatch( directory, watcher, recursive, options ); + } else { + return Errors::Log::createLastError( Errors::FileRemote, directory ); + } +} + +void FileWatcher::removeWatch( const std::string& directory ) { + mImpl->removeWatch( directory ); +} + +void FileWatcher::removeWatch( WatchID watchid ) { + mImpl->removeWatch( watchid ); +} + +void FileWatcher::watch() { + mImpl->watch(); +} + +std::vector FileWatcher::directories() { + return mImpl->directories(); +} + +void FileWatcher::followSymlinks( bool follow ) { + mFollowSymlinks = follow; +} + +const bool& FileWatcher::followSymlinks() const { + return mFollowSymlinks; +} + +void FileWatcher::allowOutOfScopeLinks( bool allow ) { + mOutOfScopeLinks = allow; +} + +const bool& FileWatcher::allowOutOfScopeLinks() const { + return mOutOfScopeLinks; +} + +} // namespace efsw diff --git a/src/efsw/FileWatcherCWrapper.cpp b/src/efsw/FileWatcherCWrapper.cpp new file mode 100644 index 0000000..258f8e0 --- /dev/null +++ b/src/efsw/FileWatcherCWrapper.cpp @@ -0,0 +1,141 @@ +#include +#include +#include + +#define TOBOOL( i ) ( ( i ) == 0 ? false : true ) + +/*************************************************************************************************/ +class Watcher_CAPI : public efsw::FileWatchListener { + public: + efsw_watcher mWatcher; + efsw_pfn_fileaction_callback mFn; + void* mParam; + efsw_pfn_handle_missed_fileactions mFnMissedFa; + + public: + Watcher_CAPI( efsw_watcher watcher, efsw_pfn_fileaction_callback fn, void* param, + efsw_pfn_handle_missed_fileactions fnfa ) : + mWatcher( watcher ), mFn( fn ), mParam( param ), mFnMissedFa( fnfa ) {} + + void handleFileAction( efsw::WatchID watchid, const std::string& dir, + const std::string& filename, efsw::Action action, + std::string oldFilename = "" ) { + mFn( mWatcher, watchid, dir.c_str(), filename.c_str(), (enum efsw_action)action, + oldFilename.c_str(), mParam ); + } + + void handleMissedFileActions( efsw::WatchID watchid, const std::string& dir ) { + if ( mFnMissedFa ) { + mFnMissedFa( mWatcher, watchid, dir.c_str() ); + } + } +}; + +/************************************************************************************************* + * globals + */ +static std::vector g_callbacks; + +Watcher_CAPI* find_callback( efsw_watcher watcher, efsw_pfn_fileaction_callback fn, void* param ) { + for ( std::vector::iterator i = g_callbacks.begin(); i != g_callbacks.end(); + ++i ) { + Watcher_CAPI* callback = *i; + + if ( callback->mFn == fn && callback->mWatcher == watcher && callback->mParam == param ) + return *i; + } + + return NULL; +} + +Watcher_CAPI* remove_callback( efsw_watcher watcher ) { + std::vector::iterator i = g_callbacks.begin(); + + while ( i != g_callbacks.end() ) { + Watcher_CAPI* callback = *i; + + if ( callback->mWatcher == watcher ) + i = g_callbacks.erase( i ); + else + ++i; + } + + return NULL; +} + +/*************************************************************************************************/ +efsw_watcher efsw_create( int generic_mode ) { + return ( efsw_watcher ) new efsw::FileWatcher( TOBOOL( generic_mode ) ); +} + +void efsw_release( efsw_watcher watcher ) { + remove_callback( watcher ); + delete (efsw::FileWatcher*)watcher; +} + +const char* efsw_getlasterror() { + static std::string log_str; + log_str = efsw::Errors::Log::getLastErrorLog(); + return log_str.c_str(); +} + +EFSW_API void efsw_clearlasterror() { + efsw::Errors::Log::clearLastError(); +} + +efsw_watchid efsw_addwatch( efsw_watcher watcher, const char* directory, + efsw_pfn_fileaction_callback callback_fn, int recursive, void* param ) { + return efsw_addwatch_withoptions( watcher, directory, callback_fn, recursive, 0, 0, param, + nullptr ); +} + +efsw_watchid +efsw_addwatch_withoptions( efsw_watcher watcher, const char* directory, + efsw_pfn_fileaction_callback callback_fn, int recursive, + efsw_watcher_option* options, int options_number, void* param, + efsw_pfn_handle_missed_fileactions callback_fn_missed_file_actions ) { + Watcher_CAPI* callback = find_callback( watcher, callback_fn, param ); + + if ( callback == NULL ) { + callback = new Watcher_CAPI( watcher, callback_fn, param, callback_fn_missed_file_actions ); + g_callbacks.push_back( callback ); + } + + std::vector watcher_options{}; + for ( int i = 0; i < options_number; i++ ) { + efsw_watcher_option* option = &options[i]; + watcher_options.emplace_back( + efsw::WatcherOption{ static_cast( option->option ), option->value } ); + } + + return ( (efsw::FileWatcher*)watcher ) + ->addWatch( std::string( directory ), callback, TOBOOL( recursive ), watcher_options ); +} + +void efsw_removewatch( efsw_watcher watcher, const char* directory ) { + ( (efsw::FileWatcher*)watcher )->removeWatch( std::string( directory ) ); +} + +void efsw_removewatch_byid( efsw_watcher watcher, efsw_watchid watchid ) { + ( (efsw::FileWatcher*)watcher )->removeWatch( watchid ); +} + +void efsw_watch( efsw_watcher watcher ) { + ( (efsw::FileWatcher*)watcher )->watch(); +} + +void efsw_follow_symlinks( efsw_watcher watcher, int enable ) { + ( (efsw::FileWatcher*)watcher )->followSymlinks( TOBOOL( enable ) ); +} + +int efsw_follow_symlinks_isenabled( efsw_watcher watcher ) { + return (int)( (efsw::FileWatcher*)watcher )->followSymlinks(); +} + +void efsw_allow_outofscopelinks( efsw_watcher watcher, int allow ) { + ( (efsw::FileWatcher*)watcher )->allowOutOfScopeLinks( TOBOOL( allow ) ); +} + +int efsw_outofscopelinks_isallowed( efsw_watcher watcher ) { + return (int)( (efsw::FileWatcher*)watcher )->allowOutOfScopeLinks(); +} diff --git a/src/efsw/FileWatcherFSEvents.cpp b/src/efsw/FileWatcherFSEvents.cpp new file mode 100644 index 0000000..70ec2b1 --- /dev/null +++ b/src/efsw/FileWatcherFSEvents.cpp @@ -0,0 +1,248 @@ +#include +#include +#include +#include +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +#include + +namespace efsw { + +int getOSXReleaseNumber() { + static int osxR = -1; + + if ( -1 == osxR ) { + struct utsname os; + + if ( -1 != uname( &os ) ) { + std::string release( os.release ); + + size_t pos = release.find_first_of( '.' ); + + if ( pos != std::string::npos ) { + release = release.substr( 0, pos ); + } + + int rel = 0; + + if ( String::fromString( rel, release ) ) { + osxR = rel; + } + } + } + + return osxR; +} + +bool FileWatcherFSEvents::isGranular() { + return getOSXReleaseNumber() >= 11; +} + +static std::string convertCFStringToStdString( CFStringRef cfString ) { + // Try to get the C string pointer directly + const char* cStr = CFStringGetCStringPtr( cfString, kCFStringEncodingUTF8 ); + + if ( cStr ) { + // If the pointer is valid, directly return a std::string from it + return std::string( cStr ); + } else { + // If not, manually convert it + CFIndex length = CFStringGetLength( cfString ); + CFIndex maxSize = CFStringGetMaximumSizeForEncoding( length, kCFStringEncodingUTF8 ) + + 1; // +1 for null terminator + + char* buffer = new char[maxSize]; + + if ( CFStringGetCString( cfString, buffer, maxSize, kCFStringEncodingUTF8 ) ) { + std::string result( buffer ); + delete[] buffer; + return result; + } else { + delete[] buffer; + return ""; + } + } +} + +void FileWatcherFSEvents::FSEventCallback( ConstFSEventStreamRef /*streamRef*/, void* userData, + size_t numEvents, void* eventPaths, + const FSEventStreamEventFlags eventFlags[], + const FSEventStreamEventId eventIds[] ) { + WatcherFSEvents* watcher = static_cast( userData ); + + std::vector events; + events.reserve( numEvents ); + + for ( size_t i = 0; i < numEvents; i++ ) { + if ( isGranular() ) { + CFDictionaryRef pathInfoDict = + static_cast( CFArrayGetValueAtIndex( (CFArrayRef)eventPaths, i ) ); + CFStringRef path = static_cast( + CFDictionaryGetValue( pathInfoDict, kFSEventStreamEventExtendedDataPathKey ) ); + CFNumberRef cfInode = static_cast( + CFDictionaryGetValue( pathInfoDict, kFSEventStreamEventExtendedFileIDKey ) ); + + if ( cfInode ) { + unsigned long inode = 0; + CFNumberGetValue( cfInode, kCFNumberLongType, &inode ); + events.push_back( FSEvent( convertCFStringToStdString( path ), (long)eventFlags[i], + (Uint64)eventIds[i], inode ) ); + } + } else { + events.push_back( FSEvent( std::string( ( (char**)eventPaths )[i] ), + (long)eventFlags[i], (Uint64)eventIds[i] ) ); + } + } + + watcher->handleActions( events ); + + watcher->process(); + + efDEBUG( "\n" ); +} + +FileWatcherFSEvents::FileWatcherFSEvents( FileWatcher* parent ) : + FileWatcherImpl( parent ), mLastWatchID( 0 ) { + mInitOK = true; + + watch(); +} + +FileWatcherFSEvents::~FileWatcherFSEvents() { + mInitOK = false; + + mWatchCond.notify_all(); + + WatchMap::iterator iter = mWatches.begin(); + + for ( ; iter != mWatches.end(); ++iter ) { + WatcherFSEvents* watch = iter->second; + + efSAFE_DELETE( watch ); + } +} + +WatchID FileWatcherFSEvents::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, const std::vector& options ) { + std::string dir( FileSystem::getRealPath( directory ) ); + + FileInfo fi( dir ); + + if ( !fi.isDirectory() ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } else if ( !fi.isReadable() ) { + return Errors::Log::createLastError( Errors::FileNotReadable, dir ); + } + + FileSystem::dirAddSlashAtEnd( dir ); + + if ( pathInWatches( dir ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, directory ); + } + + /// Check if the directory is a symbolic link + std::string curPath; + std::string link( FileSystem::getLinkRealPath( dir, curPath ) ); + + if ( "" != link ) { + /// If it's a symlink check if the realpath exists as a watcher, or + /// if the path is outside the current dir + if ( pathInWatches( link ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, directory ); + } else if ( !linkAllowed( curPath, link ) ) { + return Errors::Log::createLastError( Errors::FileOutOfScope, dir ); + } else { + dir = link; + } + } + + mLastWatchID++; + + WatcherFSEvents* pWatch = new WatcherFSEvents(); + pWatch->Listener = watcher; + pWatch->ID = mLastWatchID; + pWatch->Directory = dir; + pWatch->Recursive = recursive; + pWatch->FWatcher = this; + pWatch->ModifiedFlags = + getOptionValue( options, Option::MacModifiedFilter, efswFSEventsModified ); + pWatch->SanitizeEvents = getOptionValue( options, Option::MacSanitizeEvents, 0 ) != 0; + + pWatch->init(); + + { + Lock lock( mWatchesLock ); + mWatches.insert( std::make_pair( mLastWatchID, pWatch ) ); + } + + mWatchCond.notify_all(); + return pWatch->ID; +} + +void FileWatcherFSEvents::removeWatch( const std::string& directory ) { + Lock lock( mWatchesLock ); + + WatchMap::iterator iter = mWatches.begin(); + + for ( ; iter != mWatches.end(); ++iter ) { + if ( directory == iter->second->Directory ) { + removeWatch( iter->second->ID ); + return; + } + } +} + +void FileWatcherFSEvents::removeWatch( WatchID watchid ) { + Lock lock( mWatchesLock ); + + WatchMap::iterator iter = mWatches.find( watchid ); + + if ( iter == mWatches.end() ) + return; + + WatcherFSEvents* watch = iter->second; + + mWatches.erase( iter ); + + efDEBUG( "Removed watch %s\n", watch->Directory.c_str() ); + + efSAFE_DELETE( watch ); +} + +void FileWatcherFSEvents::watch() {} + +void FileWatcherFSEvents::handleAction( Watcher* /*watch*/, const std::string& /*filename*/, + unsigned long /*action*/, std::string /*oldFilename*/ ) { + /// Not used +} + +std::vector FileWatcherFSEvents::directories() { + std::vector dirs; + + Lock lock( mWatchesLock ); + + dirs.reserve( mWatches.size() ); + + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + dirs.push_back( std::string( it->second->Directory ) ); + } + + return dirs; +} + +bool FileWatcherFSEvents::pathInWatches( const std::string& path ) { + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + if ( it->second->Directory == path ) { + return true; + } + } + + return false; +} + +} // namespace efsw + +#endif diff --git a/src/efsw/FileWatcherFSEvents.hpp b/src/efsw/FileWatcherFSEvents.hpp new file mode 100644 index 0000000..daa538c --- /dev/null +++ b/src/efsw/FileWatcherFSEvents.hpp @@ -0,0 +1,80 @@ +#ifndef EFSW_FILEWATCHERFSEVENTS_HPP +#define EFSW_FILEWATCHERFSEVENTS_HPP + +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +#include +#include +#include +#include +#include +#include +#include +#include + +namespace efsw { + +/// Implementation for Win32 based on ReadDirectoryChangesW. +/// @class FileWatcherFSEvents +class FileWatcherFSEvents : public FileWatcherImpl { + friend class WatcherFSEvents; + + public: + /// @return If FSEvents supports file-level notifications ( true if OS X >= 10.7 ) + static bool isGranular(); + + /// type for a map from WatchID to WatcherWin32 pointer + typedef std::map WatchMap; + + FileWatcherFSEvents( FileWatcher* parent ); + + virtual ~FileWatcherFSEvents(); + + /// Add a directory watch + /// On error returns WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + const std::vector &options ) override; + + /// Remove a directory watch. This is a brute force lazy search O(nlogn). + void removeWatch( const std::string& directory ) override; + + /// Remove a directory watch. This is a map lookup O(logn). + void removeWatch( WatchID watchid ) override; + + /// Updates the watcher. Must be called often. + void watch() override; + + /// Handles the action + void handleAction( Watcher* watch, const std::string& filename, unsigned long action, + std::string oldFilename = "" ) override; + + /// @return Returns a list of the directories that are being watched + std::vector directories() override; + + protected: + static void FSEventCallback( ConstFSEventStreamRef streamRef, void* userData, size_t numEvents, + void* eventPaths, const FSEventStreamEventFlags eventFlags[], + const FSEventStreamEventId eventIds[] ); + + /// Vector of WatcherWin32 pointers + WatchMap mWatches; + + /// The last watchid + WatchID mLastWatchID; + + Mutex mWatchesLock; + + bool pathInWatches( const std::string& path ) override; + + std::mutex mWatchesMutex; + std::condition_variable mWatchCond; + +}; + +} // namespace efsw + +#endif + +#endif diff --git a/src/efsw/FileWatcherGeneric.cpp b/src/efsw/FileWatcherGeneric.cpp new file mode 100644 index 0000000..e0d3930 --- /dev/null +++ b/src/efsw/FileWatcherGeneric.cpp @@ -0,0 +1,158 @@ +#include +#include +#include +#include + +namespace efsw { + +FileWatcherGeneric::FileWatcherGeneric( FileWatcher* parent ) : + FileWatcherImpl( parent ), mThread( NULL ), mLastWatchID( 0 ) { + mInitOK = true; + mIsGeneric = true; +} + +FileWatcherGeneric::~FileWatcherGeneric() { + mInitOK = false; + + efSAFE_DELETE( mThread ); + + /// Delete the watches + WatchList::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + efSAFE_DELETE( ( *it ) ); + } +} + +WatchID FileWatcherGeneric::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, const std::vector& options ) { + std::string dir( directory ); + + FileSystem::dirAddSlashAtEnd( dir ); + + FileInfo fi( dir ); + + if ( !fi.isDirectory() ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } else if ( !fi.isReadable() ) { + return Errors::Log::createLastError( Errors::FileNotReadable, dir ); + } else if ( pathInWatches( dir ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, dir ); + } + + std::string curPath; + std::string link( FileSystem::getLinkRealPath( dir, curPath ) ); + + if ( "" != link ) { + if ( pathInWatches( link ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, dir ); + } else if ( !linkAllowed( curPath, link ) ) { + return Errors::Log::createLastError( Errors::FileOutOfScope, dir ); + } else { + dir = link; + } + } + + mLastWatchID++; + + WatcherGeneric* pWatch = new WatcherGeneric( mLastWatchID, dir, watcher, this, recursive ); + + Lock lock( mWatchesLock ); + mWatches.push_back( pWatch ); + + return pWatch->ID; +} + +void FileWatcherGeneric::removeWatch( const std::string& directory ) { + WatchList::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + if ( ( *it )->Directory == directory ) { + WatcherGeneric* watch = ( *it ); + + Lock lock( mWatchesLock ); + + mWatches.erase( it ); + + efSAFE_DELETE( watch ); + + return; + } + } +} + +void FileWatcherGeneric::removeWatch( WatchID watchid ) { + WatchList::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + if ( ( *it )->ID == watchid ) { + WatcherGeneric* watch = ( *it ); + + Lock lock( mWatchesLock ); + + mWatches.erase( it ); + + efSAFE_DELETE( watch ); + + return; + } + } +} + +void FileWatcherGeneric::watch() { + if ( NULL == mThread ) { + mThread = new Thread([this]{run();}); + mThread->launch(); + } +} + +void FileWatcherGeneric::run() { + do { + { + Lock lock( mWatchesLock ); + + WatchList::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + ( *it )->watch(); + } + } + + if ( mInitOK ) + System::sleep( 1000 ); + } while ( mInitOK ); +} + +void FileWatcherGeneric::handleAction( Watcher*, const std::string&, unsigned long, std::string ) { + /// Not used +} + +std::vector FileWatcherGeneric::directories() { + std::vector dirs; + + Lock lock( mWatchesLock ); + + dirs.reserve( mWatches.size() ); + + WatchList::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + dirs.push_back( ( *it )->Directory ); + } + + return dirs; +} + +bool FileWatcherGeneric::pathInWatches( const std::string& path ) { + WatchList::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + if ( ( *it )->Directory == path || ( *it )->pathInWatches( path ) ) { + return true; + } + } + + return false; +} + +} // namespace efsw diff --git a/src/efsw/FileWatcherGeneric.hpp b/src/efsw/FileWatcherGeneric.hpp new file mode 100644 index 0000000..47f7e04 --- /dev/null +++ b/src/efsw/FileWatcherGeneric.hpp @@ -0,0 +1,61 @@ +#ifndef EFSW_FILEWATCHERGENERIC_HPP +#define EFSW_FILEWATCHERGENERIC_HPP + +#include +#include +#include +#include + +namespace efsw { + +/// Implementation for Generic File Watcher. +/// @class FileWatcherGeneric +class FileWatcherGeneric : public FileWatcherImpl { + public: + typedef std::vector WatchList; + + FileWatcherGeneric( FileWatcher* parent ); + + virtual ~FileWatcherGeneric(); + + /// Add a directory watch + /// On error returns WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + const std::vector &options ) override; + + /// Remove a directory watch. This is a brute force lazy search O(nlogn). + void removeWatch( const std::string& directory ) override; + + /// Remove a directory watch. This is a map lookup O(logn). + void removeWatch( WatchID watchid ) override; + + /// Updates the watcher. Must be called often. + void watch() override; + + /// Handles the action + void handleAction( Watcher* watch, const std::string& filename, unsigned long action, + std::string oldFilename = "" ) override; + + /// @return Returns a list of the directories that are being watched + std::vector directories() override; + + protected: + Thread* mThread; + + /// The last watchid + WatchID mLastWatchID; + + /// Map of WatchID to WatchStruct pointers + WatchList mWatches; + + Mutex mWatchesLock; + + bool pathInWatches( const std::string& path ) override; + + private: + void run(); +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/FileWatcherImpl.cpp b/src/efsw/FileWatcherImpl.cpp new file mode 100644 index 0000000..bf69a45 --- /dev/null +++ b/src/efsw/FileWatcherImpl.cpp @@ -0,0 +1,34 @@ +#include +#include +#include + +namespace efsw { + +FileWatcherImpl::FileWatcherImpl( FileWatcher* parent ) : + mFileWatcher( parent ), mInitOK( false ), mIsGeneric( false ) { + System::maxFD(); +} + +FileWatcherImpl::~FileWatcherImpl() {} + +bool FileWatcherImpl::initOK() { + return static_cast( mInitOK ); +} + +bool FileWatcherImpl::linkAllowed( const std::string& curPath, const std::string& link ) { + return ( mFileWatcher->followSymlinks() && mFileWatcher->allowOutOfScopeLinks() ) || + -1 != String::strStartsWith( curPath, link ); +} + +int FileWatcherImpl::getOptionValue( const std::vector& options, Option option, + int defaultValue ) { + for ( size_t i = 0; i < options.size(); i++ ) { + if ( options[i].mOption == option ) { + return options[i].mValue; + } + } + + return defaultValue; +} + +} // namespace efsw diff --git a/src/efsw/FileWatcherImpl.hpp b/src/efsw/FileWatcherImpl.hpp new file mode 100644 index 0000000..a6ec472 --- /dev/null +++ b/src/efsw/FileWatcherImpl.hpp @@ -0,0 +1,64 @@ +#ifndef EFSW_FILEWATCHERIMPL_HPP +#define EFSW_FILEWATCHERIMPL_HPP + +#include +#include +#include +#include +#include +#include + +namespace efsw { + +class FileWatcherImpl { + public: + FileWatcherImpl( FileWatcher* parent ); + + virtual ~FileWatcherImpl(); + + /// Add a directory watch + /// On error returns WatchID with Error type. + virtual WatchID addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, const std::vector& options = {} ) = 0; + + /// Remove a directory watch. This is a brute force lazy search O(nlogn). + virtual void removeWatch( const std::string& directory ) = 0; + + /// Remove a directory watch. This is a map lookup O(logn). + virtual void removeWatch( WatchID watchid ) = 0; + + /// Updates the watcher. Must be called often. + virtual void watch() = 0; + + /// Handles the action + virtual void handleAction( Watcher* watch, const std::string& filename, unsigned long action, + std::string oldFilename = "" ) = 0; + + /// @return Returns a list of the directories that are being watched + virtual std::vector directories() = 0; + + /// @return true if the backend init successfully + virtual bool initOK(); + + /// @return If the link is allowed according to the current path and the state of out scope + /// links + virtual bool linkAllowed( const std::string& curPath, const std::string& link ); + + /// Search if a directory already exists in the watches + virtual bool pathInWatches( const std::string& path ) = 0; + + protected: + friend class FileWatcher; + friend class DirWatcherGeneric; + + FileWatcher* mFileWatcher; + Atomic mInitOK; + bool mIsGeneric; + + int getOptionValue( const std::vector& options, Option option, + int defaultValue ); +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/FileWatcherInotify.cpp b/src/efsw/FileWatcherInotify.cpp new file mode 100644 index 0000000..409ac04 --- /dev/null +++ b/src/efsw/FileWatcherInotify.cpp @@ -0,0 +1,612 @@ +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_INOTIFY + +#include +#include +#include +#include +#include +#include + +#ifdef EFSW_INOTIFY_NOSYS +#include +#else +#include +#endif + +#include +#include +#include +#include +#include + +#define BUFF_SIZE ( ( sizeof( struct inotify_event ) + FILENAME_MAX ) * 1024 ) + +namespace efsw { + +FileWatcherInotify::FileWatcherInotify( FileWatcher* parent ) : + FileWatcherImpl( parent ), mFD( -1 ), mThread( NULL ), mIsTakingAction( false ) { + mFD = inotify_init(); + + if ( mFD < 0 ) { + efDEBUG( "Error: %s\n", strerror( errno ) ); + } else { + mInitOK = true; + } +} + +FileWatcherInotify::~FileWatcherInotify() { + mInitOK = false; + // There is deadlock when release FileWatcherInotify instance since its handAction + // function is still running and hangs in requiring lock without init lock captured. + while ( mIsTakingAction ) { + // It'd use condition-wait instead of sleep. Actually efsw has no such + // implementation so we just skip and sleep while for that to avoid deadlock. + usleep( 1000 ); + }; + Lock initLock( mInitLock ); + + efSAFE_DELETE( mThread ); + + Lock l( mWatchesLock ); + Lock l2( mRealWatchesLock ); + + WatchMap::iterator iter = mWatches.begin(); + WatchMap::iterator end = mWatches.end(); + + for ( ; iter != end; ++iter ) { + efSAFE_DELETE( iter->second ); + } + + mWatches.clear(); + + if ( mFD != -1 ) { + close( mFD ); + mFD = -1; + } +} + +WatchID FileWatcherInotify::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, const std::vector& options ) { + if ( !mInitOK ) + return Errors::Log::createLastError( Errors::Unspecified, directory ); + Lock initLock( mInitLock ); + bool syntheticEvents = getOptionValue( options, Options::LinuxProduceSyntheticEvents, 0 ) != 0; + return addWatch( directory, watcher, recursive, syntheticEvents, NULL ); +} + +WatchID FileWatcherInotify::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, bool syntheticEvents, WatcherInotify* parent, + bool fromInternalEvent ) { + std::string dir( directory ); + + FileSystem::dirAddSlashAtEnd( dir ); + + FileInfo fi( dir ); + + if ( !fi.isDirectory() ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } else if ( !fi.isReadable() ) { + return Errors::Log::createLastError( Errors::FileNotReadable, dir ); + } else if ( pathInWatches( dir ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, directory ); + } else if ( NULL != parent && FileSystem::isRemoteFS( dir ) ) { + return Errors::Log::createLastError( Errors::FileRemote, dir ); + } + + /// Check if the directory is a symbolic link + std::string curPath; + std::string link( FileSystem::getLinkRealPath( dir, curPath ) ); + + if ( "" != link ) { + /// Avoid adding symlinks directories if it's now enabled + if ( NULL != parent && !mFileWatcher->followSymlinks() ) { + return Errors::Log::createLastError( Errors::FileOutOfScope, dir ); + } + + /// If it's a symlink check if the realpath exists as a watcher, or + /// if the path is outside the current dir + if ( pathInWatches( link ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, directory ); + } else if ( !linkAllowed( curPath, link ) ) { + return Errors::Log::createLastError( Errors::FileOutOfScope, dir ); + } else { + dir = link; + } + } + + int wd = inotify_add_watch( mFD, dir.c_str(), + IN_CLOSE_WRITE | IN_MOVED_TO | IN_CREATE | IN_MOVED_FROM | + IN_DELETE | IN_MODIFY ); + + if ( wd < 0 ) { + if ( errno == ENOENT ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } else { + return Errors::Log::createLastError( Errors::Unspecified, + std::string( strerror( errno ) ) ); + } + } + + efDEBUG( "Added watch %s with id: %d\n", dir.c_str(), wd ); + + WatcherInotify* pWatch = new WatcherInotify(); + pWatch->Listener = watcher; + pWatch->ID = parent ? parent->ID : wd; + pWatch->InotifyID = wd; + pWatch->Directory = dir; + pWatch->Recursive = recursive; + pWatch->Parent = parent; + pWatch->syntheticEvents = syntheticEvents; + + { + Lock lock( mWatchesLock ); + mWatches.insert( std::make_pair( wd, pWatch ) ); + mWatchesRef[pWatch->Directory] = wd; + } + + if ( NULL == pWatch->Parent ) { + Lock l( mRealWatchesLock ); + mRealWatches[pWatch->InotifyID] = pWatch; + } + + if ( pWatch->Recursive ) { + std::map files = FileSystem::filesInfoFromPath( pWatch->Directory ); + + if ( fromInternalEvent && parent != NULL && syntheticEvents ) { + for ( const auto& file : files ) { + if ( file.second.isRegularFile() || file.second.isDirectory() || + file.second.isLink() ) { + pWatch->Listener->handleFileAction( + pWatch->ID, pWatch->Directory, + FileSystem::fileNameFromPath( file.second.Filepath ), Actions::Add ); + } + } + } + + std::map::iterator it = files.begin(); + + for ( ; it != files.end(); ++it ) { + if ( !mInitOK ) + break; + + const FileInfo& cfi = it->second; + + if ( cfi.isDirectory() && cfi.isReadable() ) { + addWatch( cfi.Filepath, watcher, recursive, syntheticEvents, pWatch, + fromInternalEvent ); + } + } + } + + return wd; +} + +void FileWatcherInotify::removeWatchLocked( WatchID watchid ) { + WatchMap::iterator iter = mWatches.find( watchid ); + if ( iter == mWatches.end() ) + return; + + WatcherInotify* watch = iter->second; + + for ( std::vector>::iterator itm = + mMovedOutsideWatches.begin(); + mMovedOutsideWatches.end() != itm; ++itm ) { + if ( itm->first == watch ) { + mMovedOutsideWatches.erase( itm ); + break; + } + } + + if ( watch->Recursive && NULL == watch->Parent ) { + WatchMap::iterator it = mWatches.begin(); + std::vector eraseWatches; + + for ( ; it != mWatches.end(); ++it ) + if ( it->second != watch && it->second->inParentTree( watch ) ) + eraseWatches.push_back( it->second->InotifyID ); + + for ( std::vector::iterator eit = eraseWatches.begin(); eit != eraseWatches.end(); + ++eit ) { + removeWatch( *eit ); + } + } + + mWatchesRef.erase( watch->Directory ); + mWatches.erase( iter ); + + if ( NULL == watch->Parent ) { + WatchMap::iterator eraseit = mRealWatches.find( watch->InotifyID ); + + if ( eraseit != mRealWatches.end() ) { + mRealWatches.erase( eraseit ); + } + } + + int err = inotify_rm_watch( mFD, watchid ); + + if ( err < 0 ) { + efDEBUG( "Error removing watch %d: %s\n", watchid, strerror( errno ) ); + } else { + efDEBUG( "Removed watch %s with id: %d\n", watch->Directory.c_str(), watchid ); + } + + efSAFE_DELETE( watch ); +} + +void FileWatcherInotify::removeWatch( const std::string& directory ) { + if ( !mInitOK ) + return; + Lock initLock( mInitLock ); + Lock lock( mWatchesLock ); + Lock l( mRealWatchesLock ); + + std::unordered_map::iterator ref = mWatchesRef.find( directory ); + if ( ref == mWatchesRef.end() ) + return; + + removeWatchLocked( ref->second ); +} + +void FileWatcherInotify::removeWatch( WatchID watchid ) { + if ( !mInitOK ) + return; + Lock initLock( mInitLock ); + Lock lock( mWatchesLock ); + removeWatchLocked( watchid ); +} + +void FileWatcherInotify::watch() { + if ( NULL == mThread ) { + mThread = new Thread( [this] { run(); } ); + mThread->launch(); + } +} + +Watcher* FileWatcherInotify::watcherContainsDirectory( std::string dir ) { + FileSystem::dirRemoveSlashAtEnd( dir ); + std::string watcherPath = FileSystem::pathRemoveFileName( dir ); + FileSystem::dirAddSlashAtEnd( watcherPath ); + Lock lock( mWatchesLock ); + + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + Watcher* watcher = it->second; + if ( watcher->Directory == watcherPath ) + return watcher; + } + + return NULL; +} + +void FileWatcherInotify::run() { + char* buff = new char[BUFF_SIZE]; + memset( buff, 0, BUFF_SIZE ); + + WatcherInotify* curWatcher = NULL; + WatcherInotify* currentMoveFrom = NULL; + u_int32_t currentMoveCookie = -1; + bool lastWasMovedFrom = false; + std::string prevOldFileName; + + do { + fd_set rfds; + FD_ZERO( &rfds ); + FD_SET( mFD, &rfds ); + timeval timeout; + timeout.tv_sec = 0; + timeout.tv_usec = 100000; + + if ( select( FD_SETSIZE, &rfds, NULL, NULL, &timeout ) > 0 ) { + ssize_t len; + + len = read( mFD, buff, BUFF_SIZE ); + + if ( len != -1 ) { + ssize_t i = 0; + + while ( i < len ) { + struct inotify_event* pevent = (struct inotify_event*)&buff[i]; + + { + curWatcher = NULL; + + { + Lock lock( mWatchesLock ); + + auto wit = mWatches.find( pevent->wd ); + + if ( wit != mWatches.end() ) + curWatcher = wit->second; + } + + if ( curWatcher ) { + handleAction( curWatcher, (char*)pevent->name, pevent->mask ); + + if ( ( pevent->mask & IN_MOVED_TO ) && curWatcher == currentMoveFrom && + pevent->cookie == currentMoveCookie ) { + /// make pair success + currentMoveFrom = NULL; + currentMoveCookie = -1; + } else if ( pevent->mask & IN_MOVED_FROM ) { + // Previous event was moved from and current event is moved from + // Treat it as a DELETE or moved ouside watches + if ( lastWasMovedFrom && currentMoveFrom ) { + mMovedOutsideWatches.push_back( + std::make_pair( currentMoveFrom, prevOldFileName ) ); + } + + currentMoveFrom = curWatcher; + currentMoveCookie = pevent->cookie; + } else { + /// Keep track of the IN_MOVED_FROM events to know + /// if the IN_MOVED_TO event is also fired + if ( currentMoveFrom ) { + if ( std::find_if( mMovedOutsideWatches.begin(), + mMovedOutsideWatches.end(), + [currentMoveFrom]( + const std::pair& moved ) { + return moved.first == currentMoveFrom; + } ) == mMovedOutsideWatches.end() ) { + mMovedOutsideWatches.push_back( + std::make_pair( currentMoveFrom, prevOldFileName ) ); + } else { + efDEBUG( "Info: Tried to add watch to the moved outside " + "watches but it was already there, Watch ID: %d - " + "Address: %p - Path: \"%s\" - prevOldFileName: " + "\"%s\"\n", + pevent->wd, currentMoveFrom, + currentMoveFrom->Directory.c_str(), + prevOldFileName.c_str() ); + } + } + + currentMoveFrom = NULL; + currentMoveCookie = -1; + } + } + + lastWasMovedFrom = ( pevent->mask & IN_MOVED_FROM ) != 0; + if ( pevent->mask & IN_MOVED_FROM ) + prevOldFileName = std::string( (char*)pevent->name ); + } + + i += sizeof( struct inotify_event ) + pevent->len; + } + } + } else { + // Here means no event received + // If last event is IN_MOVED_FROM, we assume no IN_MOVED_TO + if ( currentMoveFrom ) { + if ( std::find_if( + mMovedOutsideWatches.begin(), mMovedOutsideWatches.end(), + [currentMoveFrom]( const std::pair& moved ) { + return moved.first == currentMoveFrom; + } ) == mMovedOutsideWatches.end() ) { + mMovedOutsideWatches.push_back( + std::make_pair( currentMoveFrom, currentMoveFrom->OldFileName ) ); + } else { + efDEBUG( "Warning: Tried to add watch to the moved outside " + "watches but it was already there, Watch Address: %p\n", + currentMoveFrom ); + } + } + + currentMoveFrom = NULL; + currentMoveCookie = -1; + } + + if ( !mMovedOutsideWatches.empty() ) { + // We need to make a copy since the element mMovedOutsideWatches could be modified + // during the iteration. + std::vector> movedOutsideWatches( + mMovedOutsideWatches ); + + /// In case that the IN_MOVED_TO is never fired means that the file was moved to other + /// folder + for ( std::vector>::iterator it = + movedOutsideWatches.begin(); + it != movedOutsideWatches.end(); ++it ) { + + // Skip if the watch has already being removed + if ( mMovedOutsideWatches.size() != movedOutsideWatches.size() ) { + bool found = false; + for ( std::vector>::iterator itm = + mMovedOutsideWatches.begin(); + mMovedOutsideWatches.end() != itm; ++itm ) { + if ( itm->first == it->first ) { + found = true; + break; + } + } + if ( !found ) + continue; + } + + Watcher* watch = it->first; + const std::string& oldFileName = it->second; + + /// Check if the file move was a folder already being watched + std::vector eraseWatches; + + { + Lock lock( mWatchesLock ); + + for ( auto wit : mWatches ) { + Watcher* oldWatch = wit.second; + + if ( oldWatch != watch && + -1 != String::strStartsWith( watch->Directory + oldFileName + "/", + oldWatch->Directory ) ) { + eraseWatches.push_back( oldWatch ); + } + } + } + + /// Remove invalid watches + std::stable_sort( eraseWatches.begin(), eraseWatches.end(), + []( const Watcher* left, const Watcher* right ) { + return left->Directory < right->Directory; + } ); + + if ( eraseWatches.empty() ) { + handleAction( watch, oldFileName, IN_DELETE ); + } else { + for ( std::vector::reverse_iterator eit = eraseWatches.rbegin(); + eit != eraseWatches.rend(); ++eit ) { + Watcher* rmWatch = *eit; + + /// Create Delete event for removed watches that have been moved too + if ( Watcher* cntWatch = watcherContainsDirectory( rmWatch->Directory ) ) { + handleAction( cntWatch, + FileSystem::fileNameFromPath( rmWatch->Directory ), + IN_DELETE ); + } + } + } + } + + mMovedOutsideWatches.clear(); + } + } while ( mInitOK ); + + delete[] buff; +} + +void FileWatcherInotify::checkForNewWatcher( Watcher* watch, std::string fpath ) { + FileSystem::dirAddSlashAtEnd( fpath ); + + /// If the watcher is recursive, checks if the new file is a folder, and creates a watcher + if ( watch->Recursive && FileSystem::isDirectory( fpath ) ) { + bool found = false; + + { + Lock lock( mWatchesLock ); + + /// First check if exists + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + if ( it->second->Directory == fpath ) { + found = true; + break; + } + } + } + + if ( !found ) { + WatcherInotify* iWatch = static_cast( watch ); + addWatch( fpath, watch->Listener, watch->Recursive, iWatch->syntheticEvents, + static_cast( watch ), true ); + } + } +} + +void FileWatcherInotify::handleAction( Watcher* watch, const std::string& filename, + unsigned long action, std::string ) { + if ( !watch || !watch->Listener || !mInitOK ) { + return; + } + mIsTakingAction = true; + Lock initLock( mInitLock ); + + std::string fpath( watch->Directory + filename ); + + if ( IN_Q_OVERFLOW & action ) { + watch->Listener->handleMissedFileActions( watch->ID, watch->Directory ); + } else if ( ( IN_CLOSE_WRITE & action ) || ( IN_MODIFY & action ) ) { + watch->Listener->handleFileAction( watch->ID, watch->Directory, filename, + Actions::Modified ); + } else if ( IN_MOVED_TO & action ) { + /// If OldFileName doesn't exist means that the file has been moved from other folder, so we + /// just send the Add event + if ( watch->OldFileName.empty() ) { + watch->Listener->handleFileAction( watch->ID, watch->Directory, filename, + Actions::Add ); + + watch->Listener->handleFileAction( watch->ID, watch->Directory, filename, + Actions::Modified ); + + checkForNewWatcher( watch, fpath ); + } else { + watch->Listener->handleFileAction( watch->ID, watch->Directory, filename, + Actions::Moved, watch->OldFileName ); + } + + if ( watch->Recursive && FileSystem::isDirectory( fpath ) ) { + /// Update the new directory path + std::string opath( watch->Directory + watch->OldFileName ); + FileSystem::dirAddSlashAtEnd( opath ); + FileSystem::dirAddSlashAtEnd( fpath ); + + Lock lock( mWatchesLock ); + + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + if ( it->second->Directory == opath ) { + it->second->Directory = fpath; + it->second->DirInfo = FileInfo( fpath ); + } else if ( -1 != String::strStartsWith( opath, it->second->Directory ) ) { + it->second->Directory = fpath + it->second->Directory.substr( opath.size() ); + it->second->DirInfo.Filepath = it->second->Directory; + } + } + } + + watch->OldFileName = ""; + } else if ( IN_CREATE & action ) { + watch->Listener->handleFileAction( watch->ID, watch->Directory, filename, Actions::Add ); + + checkForNewWatcher( watch, fpath ); + } else if ( IN_MOVED_FROM & action ) { + watch->OldFileName = filename; + } else if ( IN_DELETE & action ) { + watch->Listener->handleFileAction( watch->ID, watch->Directory, filename, Actions::Delete ); + + FileSystem::dirAddSlashAtEnd( fpath ); + + /// If the file erased is a directory and recursive is enabled, removes the directory erased + if ( watch->Recursive ) { + Lock l( mWatchesLock ); + + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + if ( it->second->Directory == fpath ) { + removeWatchLocked( it->second->InotifyID ); + break; + } + } + } + } + mIsTakingAction = false; +} + +std::vector FileWatcherInotify::directories() { + std::vector dirs; + + Lock l( mRealWatchesLock ); + + dirs.reserve( mRealWatches.size() ); + + WatchMap::iterator it = mRealWatches.begin(); + + for ( ; it != mRealWatches.end(); ++it ) + dirs.push_back( it->second->Directory ); + + return dirs; +} + +bool FileWatcherInotify::pathInWatches( const std::string& path ) { + Lock l( mRealWatchesLock ); + + /// Search in the real watches, since it must allow adding a watch already watched as a subdir + WatchMap::iterator it = mRealWatches.begin(); + + for ( ; it != mRealWatches.end(); ++it ) + if ( it->second->Directory == path ) + return true; + + return false; +} + +} // namespace efsw + +#endif diff --git a/src/efsw/FileWatcherInotify.hpp b/src/efsw/FileWatcherInotify.hpp new file mode 100644 index 0000000..26d2c0b --- /dev/null +++ b/src/efsw/FileWatcherInotify.hpp @@ -0,0 +1,87 @@ +#ifndef EFSW_FILEWATCHERLINUX_HPP +#define EFSW_FILEWATCHERLINUX_HPP + +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_INOTIFY + +#include +#include +#include +#include + +namespace efsw { + +/// Implementation for Linux based on inotify. +/// @class FileWatcherInotify +class FileWatcherInotify : public FileWatcherImpl { + public: + /// type for a map from WatchID to WatchStruct pointer + typedef std::map WatchMap; + + FileWatcherInotify( FileWatcher* parent ); + + virtual ~FileWatcherInotify(); + + /// Add a directory watch + /// On error returns WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + const std::vector& options ) override; + + /// Remove a directory watch. This is a brute force lazy search O(nlogn). + void removeWatch( const std::string& directory ) override; + + /// Remove a directory watch. This is a map lookup O(logn). + void removeWatch( WatchID watchid ) override; + + /// Updates the watcher. Must be called often. + void watch() override; + + /// Handles the action + void handleAction( Watcher* watch, const std::string& filename, unsigned long action, + std::string oldFilename = "" ) override; + + /// @return Returns a list of the directories that are being watched + std::vector directories() override; + + protected: + /// Map of WatchID to WatchStruct pointers + WatchMap mWatches; + + /// User added watches + WatchMap mRealWatches; + + std::unordered_map mWatchesRef; + + /// inotify file descriptor + int mFD; + + Thread* mThread; + + Mutex mWatchesLock; + Mutex mRealWatchesLock; + Mutex mInitLock; + bool mIsTakingAction; + std::vector> mMovedOutsideWatches; + + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + bool syntheticEvents, WatcherInotify* parent = NULL, + bool fromInternalEvent = false ); + + bool pathInWatches( const std::string& path ) override; + + private: + void run(); + + void removeWatchLocked( WatchID watchid ); + + void checkForNewWatcher( Watcher* watch, std::string fpath ); + + Watcher* watcherContainsDirectory( std::string dir ); +}; + +} // namespace efsw + +#endif + +#endif diff --git a/src/efsw/FileWatcherKqueue.cpp b/src/efsw/FileWatcherKqueue.cpp new file mode 100644 index 0000000..41b4357 --- /dev/null +++ b/src/efsw/FileWatcherKqueue.cpp @@ -0,0 +1,229 @@ +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_KQUEUE || EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +namespace efsw { + +FileWatcherKqueue::FileWatcherKqueue( FileWatcher* parent ) : + FileWatcherImpl( parent ), + mLastWatchID( 0 ), + mThread( NULL ), + mFileDescriptorCount( 1 ), + mAddingWatcher( false ) { + mTimeOut.tv_sec = 0; + mTimeOut.tv_nsec = 0; + mInitOK = true; +} + +FileWatcherKqueue::~FileWatcherKqueue() { + WatchMap::iterator iter = mWatches.begin(); + + for ( ; iter != mWatches.end(); ++iter ) { + efSAFE_DELETE( iter->second ); + } + + mWatches.clear(); + + mInitOK = false; + + efSAFE_DELETE( mThread ); +} + +WatchID FileWatcherKqueue::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, const std::vector& options ) { + static bool s_ug = false; + + std::string dir( directory ); + + FileSystem::dirAddSlashAtEnd( dir ); + + FileInfo fi( dir ); + + if ( !fi.isDirectory() ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } else if ( !fi.isReadable() ) { + return Errors::Log::createLastError( Errors::FileNotReadable, dir ); + } else if ( pathInWatches( dir ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, directory ); + } + + std::string curPath; + std::string link( FileSystem::getLinkRealPath( dir, curPath ) ); + + if ( "" != link ) { + if ( pathInWatches( link ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, directory ); + } else if ( !linkAllowed( curPath, link ) ) { + return Errors::Log::createLastError( Errors::FileOutOfScope, dir ); + } else { + dir = link; + } + } + + /// Check first if are enough file descriptors available to create another kqueue watcher, + /// otherwise it creates a generic watcher + if ( availablesFD() ) { + mAddingWatcher = true; + + WatcherKqueue* watch = new WatcherKqueue( ++mLastWatchID, dir, watcher, recursive, this ); + + { + Lock lock( mWatchesLock ); + mWatches.insert( std::make_pair( mLastWatchID, watch ) ); + } + + watch->addAll(); + + // if failed to open the directory... erase the watcher + if ( !watch->initOK() ) { + int le = watch->lastErrno(); + + mWatches.erase( watch->ID ); + + efSAFE_DELETE( watch ); + + mLastWatchID--; + + // Probably the folder has too many files, create a generic watcher + if ( EACCES != le ) { + WatcherGeneric* genericWatch = + new WatcherGeneric( ++mLastWatchID, dir, watcher, this, recursive ); + + Lock lock( mWatchesLock ); + mWatches.insert( std::make_pair( mLastWatchID, genericWatch ) ); + } else { + return Errors::Log::createLastError( Errors::Unspecified, link ); + } + } + + mAddingWatcher = false; + } else { + if ( !s_ug ) { + efDEBUG( "Started using generic watcher, file descriptor limit reached: %ld\n", + mFileDescriptorCount ); + s_ug = true; + } + + WatcherGeneric* watch = new WatcherGeneric( ++mLastWatchID, dir, watcher, this, recursive ); + + Lock lock( mWatchesLock ); + mWatches.insert( std::make_pair( mLastWatchID, watch ) ); + } + + return mLastWatchID; +} + +void FileWatcherKqueue::removeWatch( const std::string& directory ) { + Lock lock( mWatchesLock ); + + WatchMap::iterator iter = mWatches.begin(); + + for ( ; iter != mWatches.end(); ++iter ) { + if ( directory == iter->second->Directory ) { + removeWatch( iter->first ); + return; + } + } +} + +void FileWatcherKqueue::removeWatch( WatchID watchid ) { + Lock lock( mWatchesLock ); + + WatchMap::iterator iter = mWatches.find( watchid ); + + if ( iter == mWatches.end() ) + return; + + Watcher* watch = iter->second; + + mWatches.erase( iter ); + + efSAFE_DELETE( watch ); +} + +bool FileWatcherKqueue::isAddingWatcher() const { + return mAddingWatcher; +} + +void FileWatcherKqueue::watch() { + if ( NULL == mThread ) { + mThread = new Thread([this]{run();}); + mThread->launch(); + } +} + +void FileWatcherKqueue::run() { + do { + { + Lock lock( mWatchesLock ); + + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + it->second->watch(); + } + } + + System::sleep( 500 ); + } while ( mInitOK ); +} + +void FileWatcherKqueue::handleAction( Watcher* watch, const std::string& filename, + unsigned long action, std::string oldFilename ) {} + +std::vector FileWatcherKqueue::directories() { + std::vector dirs; + + Lock lock( mWatchesLock ); + + dirs.reserve( mWatches.size() ); + + WatchMap::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + dirs.push_back( it->second->Directory ); + } + + return dirs; +} + +bool FileWatcherKqueue::pathInWatches( const std::string& path ) { + WatchMap::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); ++it ) { + if ( it->second->Directory == path ) { + return true; + } + } + + return false; +} + +void FileWatcherKqueue::addFD() { + mFileDescriptorCount++; +} + +void FileWatcherKqueue::removeFD() { + mFileDescriptorCount--; +} + +bool FileWatcherKqueue::availablesFD() { + return mFileDescriptorCount <= (Int64)System::getMaxFD() - 500; +} + +} // namespace efsw + +#endif diff --git a/src/efsw/FileWatcherKqueue.hpp b/src/efsw/FileWatcherKqueue.hpp new file mode 100644 index 0000000..ff5327b --- /dev/null +++ b/src/efsw/FileWatcherKqueue.hpp @@ -0,0 +1,81 @@ +#ifndef EFSW_FILEWATCHEROSX_HPP +#define EFSW_FILEWATCHEROSX_HPP + +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_KQUEUE || EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +#include + +namespace efsw { + +/// Implementation for OSX based on kqueue. +/// @class FileWatcherKqueue +class FileWatcherKqueue : public FileWatcherImpl { + friend class WatcherKqueue; + + public: + FileWatcherKqueue( FileWatcher* parent ); + + virtual ~FileWatcherKqueue(); + + /// Add a directory watch + /// On error returns WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + const std::vector &options ) override; + + /// Remove a directory watch. This is a brute force lazy search O(nlogn). + void removeWatch( const std::string& directory ) override; + + /// Remove a directory watch. This is a map lookup O(logn). + void removeWatch( WatchID watchid ) override; + + /// Updates the watcher. Must be called often. + void watch() override; + + /// Handles the action + void handleAction( Watcher* watch, const std::string& filename, unsigned long action, + std::string oldFilename = "" ) override; + + /// @return Returns a list of the directories that are being watched + std::vector directories() override; + + protected: + /// Map of WatchID to WatchStruct pointers + WatchMap mWatches; + + /// time out data + struct timespec mTimeOut; + + /// WatchID allocator + int mLastWatchID; + + Thread* mThread; + + Mutex mWatchesLock; + + std::vector mRemoveList; + + long mFileDescriptorCount; + + bool mAddingWatcher; + + bool isAddingWatcher() const; + + bool pathInWatches( const std::string& path ) override; + + void addFD(); + + void removeFD(); + + bool availablesFD(); + + private: + void run(); +}; + +} // namespace efsw + +#endif + +#endif diff --git a/src/efsw/FileWatcherWin32.cpp b/src/efsw/FileWatcherWin32.cpp new file mode 100644 index 0000000..05a20d6 --- /dev/null +++ b/src/efsw/FileWatcherWin32.cpp @@ -0,0 +1,267 @@ +#include +#include +#include +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +namespace efsw { + +FileWatcherWin32::FileWatcherWin32( FileWatcher* parent ) : + FileWatcherImpl( parent ), mLastWatchID( 0 ), mThread( NULL ) { + mIOCP = CreateIoCompletionPort( INVALID_HANDLE_VALUE, NULL, 0, 1 ); + if ( mIOCP && mIOCP != INVALID_HANDLE_VALUE ) + mInitOK = true; +} + +FileWatcherWin32::~FileWatcherWin32() { + mInitOK = false; + + if ( mIOCP && mIOCP != INVALID_HANDLE_VALUE ) { + PostQueuedCompletionStatus( mIOCP, 0, reinterpret_cast( this ), NULL ); + } + + efSAFE_DELETE( mThread ); + + removeAllWatches(); + + if ( mIOCP ) + CloseHandle( mIOCP ); +} + +WatchID FileWatcherWin32::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, const std::vector &options ) { + std::string dir( directory ); + + FileInfo fi( dir ); + + if ( !fi.isDirectory() ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } else if ( !fi.isReadable() ) { + return Errors::Log::createLastError( Errors::FileNotReadable, dir ); + } + + FileSystem::dirAddSlashAtEnd( dir ); + + Lock lock( mWatchesLock ); + + if ( pathInWatches( dir ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, dir ); + } + + WatchID watchid = ++mLastWatchID; + + DWORD bufferSize = static_cast( getOptionValue(options, Option::WinBufferSize, 63 * 1024) ); + DWORD notifyFilter = static_cast( getOptionValue(options, Option::WinNotifyFilter, + FILE_NOTIFY_CHANGE_CREATION | FILE_NOTIFY_CHANGE_LAST_WRITE | + FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME | + FILE_NOTIFY_CHANGE_SIZE) ); + + WatcherStructWin32* watch = CreateWatch( String::fromUtf8( dir ).toWideString().c_str(), + recursive, bufferSize, notifyFilter, mIOCP ); + + if ( NULL == watch ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } + + // Add the handle to the handles vector + watch->Watch->ID = watchid; + watch->Watch->Watch = this; + watch->Watch->Listener = watcher; + watch->Watch->DirName = new char[dir.length() + 1]; + strcpy( watch->Watch->DirName, dir.c_str() ); + + mWatches.insert( watch ); + + return watchid; +} + +void FileWatcherWin32::removeWatch( const std::string& directory ) { + Lock lock( mWatchesLock ); + + Watches::iterator iter = mWatches.begin(); + + for ( ; iter != mWatches.end(); ++iter ) { + if ( directory == ( *iter )->Watch->DirName ) { + removeWatch( *iter ); + break; + } + } +} + +void FileWatcherWin32::removeWatch( WatchID watchid ) { + Lock lock( mWatchesLock ); + + Watches::iterator iter = mWatches.begin(); + + for ( ; iter != mWatches.end(); ++iter ) { + // Find the watch ID + if ( ( *iter )->Watch->ID == watchid ) { + removeWatch( *iter ); + return; + } + } +} + +void FileWatcherWin32::removeWatch( WatcherStructWin32* watch ) { + Lock lock( mWatchesLock ); + + DestroyWatch( watch ); + mWatches.erase( watch ); +} + +void FileWatcherWin32::watch() { + if ( NULL == mThread ) { + mThread = new Thread([this]{run();}); + mThread->launch(); + } +} + +void FileWatcherWin32::removeAllWatches() { + Lock lock( mWatchesLock ); + + Watches::iterator iter = mWatches.begin(); + + for ( ; iter != mWatches.end(); ++iter ) { + DestroyWatch( ( *iter ) ); + } + + mWatches.clear(); +} + +void FileWatcherWin32::run() { + do { + if ( mInitOK && !mWatches.empty() ) { + DWORD numOfBytes = 0; + OVERLAPPED* ov = NULL; + ULONG_PTR compKey = 0; + BOOL res = FALSE; + + while ( ( res = GetQueuedCompletionStatus( mIOCP, &numOfBytes, &compKey, &ov, + INFINITE ) ) != FALSE ) { + if ( compKey != 0 && compKey == reinterpret_cast( this ) ) { + break; + } else { + Lock lock( mWatchesLock ); + if (mWatches.find( (WatcherStructWin32*)ov ) != mWatches.end()) + WatchCallback( numOfBytes, ov ); + } + } + } else { + System::sleep( 10 ); + } + } while ( mInitOK ); + + removeAllWatches(); +} + +void FileWatcherWin32::handleAction( Watcher* watch, const std::string& filename, + unsigned long action, std::string /*oldFilename*/ ) { + Action fwAction; + + switch ( action ) { + case FILE_ACTION_RENAMED_OLD_NAME: + watch->OldFileName = filename; + return; + case FILE_ACTION_ADDED: + fwAction = Actions::Add; + break; + case FILE_ACTION_RENAMED_NEW_NAME: { + fwAction = Actions::Moved; + + std::string fpath( watch->Directory + filename ); + + // Update the directory path + if ( watch->Recursive && FileSystem::isDirectory( fpath ) ) { + // Update the new directory path + std::string opath( watch->Directory + watch->OldFileName ); + FileSystem::dirAddSlashAtEnd( opath ); + FileSystem::dirAddSlashAtEnd( fpath ); + + for ( Watches::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + if ( ( *it )->Watch->Directory == opath ) { + ( *it )->Watch->Directory = fpath; + + break; + } + } + } + + std::string folderPath( static_cast( watch )->DirName ); + std::string realFilename = filename; + std::size_t sepPos = filename.find_last_of( "/\\" ); + std::string oldFolderPath = + static_cast( watch )->DirName + + watch->OldFileName.substr( 0, watch->OldFileName.find_last_of( "/\\" ) ); + + if ( sepPos != std::string::npos ) { + folderPath += + filename.substr( 0, sepPos + 1 < filename.size() ? sepPos + 1 : sepPos ); + realFilename = filename.substr( sepPos + 1 ); + } + + if ( folderPath == oldFolderPath ) { + watch->Listener->handleFileAction( + watch->ID, folderPath, realFilename, fwAction, + FileSystem::fileNameFromPath( watch->OldFileName ) ); + } else { + watch->Listener->handleFileAction( watch->ID, + static_cast( watch )->DirName, + filename, fwAction, watch->OldFileName ); + } + return; + } + case FILE_ACTION_REMOVED: + fwAction = Actions::Delete; + break; + case FILE_ACTION_MODIFIED: + fwAction = Actions::Modified; + break; + default: + return; + }; + + std::string folderPath( static_cast( watch )->DirName ); + std::string realFilename = filename; + std::size_t sepPos = filename.find_last_of( "/\\" ); + + if ( sepPos != std::string::npos ) { + folderPath += filename.substr( 0, sepPos + 1 < filename.size() ? sepPos + 1 : sepPos ); + realFilename = filename.substr( sepPos + 1 ); + } + + FileSystem::dirAddSlashAtEnd( folderPath ); + + watch->Listener->handleFileAction( watch->ID, folderPath, realFilename, fwAction ); +} + +std::vector FileWatcherWin32::directories() { + std::vector dirs; + + Lock lock( mWatchesLock ); + + dirs.reserve( mWatches.size() ); + + for ( Watches::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + dirs.push_back( std::string( ( *it )->Watch->DirName ) ); + } + + return dirs; +} + +bool FileWatcherWin32::pathInWatches( const std::string& path ) { + Lock lock( mWatchesLock ); + + for ( Watches::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + if ( ( *it )->Watch->DirName == path ) { + return true; + } + } + + return false; +} + +} // namespace efsw + +#endif diff --git a/src/efsw/FileWatcherWin32.hpp b/src/efsw/FileWatcherWin32.hpp new file mode 100644 index 0000000..3016aac --- /dev/null +++ b/src/efsw/FileWatcherWin32.hpp @@ -0,0 +1,71 @@ +#ifndef EFSW_FILEWATCHERWIN32_HPP +#define EFSW_FILEWATCHERWIN32_HPP + +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +#include +#include +#include +#include + +namespace efsw { + +/// Implementation for Win32 based on ReadDirectoryChangesW. +/// @class FileWatcherWin32 +class FileWatcherWin32 : public FileWatcherImpl { + public: + /// type for a map from WatchID to WatcherWin32 pointer + typedef std::unordered_set Watches; + + FileWatcherWin32( FileWatcher* parent ); + + virtual ~FileWatcherWin32(); + + /// Add a directory watch + /// On error returns WatchID with Error type. + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + const std::vector &options ) override; + + /// Remove a directory watch. This is a brute force lazy search O(nlogn). + void removeWatch( const std::string& directory ) override; + + /// Remove a directory watch. This is a map lookup O(logn). + void removeWatch( WatchID watchid ) override; + + /// Updates the watcher. Must be called often. + void watch() override; + + /// Handles the action + void handleAction( Watcher* watch, const std::string& filename, unsigned long action, + std::string oldFilename = "" ) override; + + /// @return Returns a list of the directories that are being watched + std::vector directories() override; + + protected: + HANDLE mIOCP; + Watches mWatches; + + /// The last watchid + WatchID mLastWatchID; + Thread* mThread; + Mutex mWatchesLock; + + bool pathInWatches( const std::string& path ) override; + + /// Remove all directory watches. + void removeAllWatches(); + + void removeWatch( WatcherStructWin32* watch ); + + private: + void run(); +}; + +} // namespace efsw + +#endif + +#endif diff --git a/src/efsw/Lock.hpp b/src/efsw/Lock.hpp new file mode 100644 index 0000000..714f3aa --- /dev/null +++ b/src/efsw/Lock.hpp @@ -0,0 +1,11 @@ +#ifndef EFSW_LOCK_HPP +#define EFSW_LOCK_HPP + +#include +#include + +namespace efsw { + using Lock = std::unique_lock; +} // namespace efsw + +#endif diff --git a/src/efsw/Log.cpp b/src/efsw/Log.cpp new file mode 100644 index 0000000..6f32df7 --- /dev/null +++ b/src/efsw/Log.cpp @@ -0,0 +1,49 @@ +#include +#include + +namespace efsw { namespace Errors { + +static std::string LastError = ""; +static Error LastErrorCode = NoError; + +std::string Log::getLastErrorLog() { + return LastError; +} + +Error Log::getLastErrorCode() { + return LastErrorCode; +} + +void Log::clearLastError() { + LastErrorCode = NoError; + LastError = ""; +} + +Error Log::createLastError( Error err, std::string log ) { + switch ( err ) { + case FileNotFound: + LastError = "File not found ( " + log + " )"; + break; + case FileRepeated: + LastError = "File repeated in watches ( " + log + " )"; + break; + case FileOutOfScope: + LastError = "Symlink file out of scope ( " + log + " )"; + break; + case FileRemote: + LastError = + "File is located in a remote file system, use a generic watcher. ( " + log + " )"; + break; + case WatcherFailed: + LastError = "File system watcher failed ( " + log + " )"; + break; + case Unspecified: + default: + LastError = log; + } + + efDEBUG( "%s\n", LastError.c_str() ); + return err; +} + +}} // namespace efsw::Errors diff --git a/src/efsw/Mutex.hpp b/src/efsw/Mutex.hpp new file mode 100644 index 0000000..c1fca75 --- /dev/null +++ b/src/efsw/Mutex.hpp @@ -0,0 +1,10 @@ +#ifndef EFSW_MUTEX_HPP +#define EFSW_MUTEX_HPP + +#include + +namespace efsw { + using Mutex = std::recursive_mutex; +} // namespace efsw + +#endif diff --git a/src/efsw/String.cpp b/src/efsw/String.cpp new file mode 100644 index 0000000..8c9a3cc --- /dev/null +++ b/src/efsw/String.cpp @@ -0,0 +1,669 @@ +#include +#include +#include + +namespace efsw { + +const std::size_t String::InvalidPos = StringType::npos; + +std::vector String::split( const std::string& str, const char& splitchar, + const bool& pushEmptyString ) { + std::vector tmp; + std::string tmpstr; + + for ( size_t i = 0; i < str.size(); i++ ) { + if ( str[i] == splitchar ) { + if ( pushEmptyString || tmpstr.size() ) { + tmp.push_back( tmpstr ); + tmpstr = ""; + } + } else { + tmpstr += str[i]; + } + } + + if ( tmpstr.size() ) { + tmp.push_back( tmpstr ); + } + + return tmp; +} + +std::vector String::split( const String& str, const Uint32& splitchar, + const bool& pushEmptyString ) { + std::vector tmp; + String tmpstr; + + for ( size_t i = 0; i < str.size(); i++ ) { + if ( str[i] == splitchar ) { + if ( pushEmptyString || tmpstr.size() ) { + tmp.push_back( tmpstr ); + tmpstr = ""; + } + } else { + tmpstr += str[i]; + } + } + + if ( tmpstr.size() ) { + tmp.push_back( tmpstr ); + } + + return tmp; +} + +int String::strStartsWith( const std::string& start, const std::string& str ) { + int pos = -1; + size_t size = start.size(); + + if ( str.size() >= size ) { + for ( std::size_t i = 0; i < size; i++ ) { + if ( start[i] == str[i] ) { + pos = (int)i; + } else { + pos = -1; + break; + } + } + } + + return pos; +} + +int String::strStartsWith( const String& start, const String& str ) { + int pos = -1; + size_t size = start.size(); + + if ( str.size() >= size ) { + for ( std::size_t i = 0; i < size; i++ ) { + if ( start[i] == str[i] ) { + pos = (int)i; + } else { + pos = -1; + break; + } + } + } + + return pos; +} + +String::String() {} + +String::String( char ansiChar, const std::locale& locale ) { + mString += Utf32::DecodeAnsi( ansiChar, locale ); +} + +#ifndef EFSW_NO_WIDECHAR +String::String( wchar_t wideChar ) { + mString += Utf32::DecodeWide( wideChar ); +} +#endif + +String::String( StringBaseType utf32Char ) { + mString += utf32Char; +} + +String::String( const char* uf8String ) { + if ( uf8String ) { + std::size_t length = strlen( uf8String ); + + if ( length > 0 ) { + mString.reserve( length + 1 ); + + Utf8::ToUtf32( uf8String, uf8String + length, std::back_inserter( mString ) ); + } + } +} + +String::String( const std::string& utf8String ) { + mString.reserve( utf8String.length() + 1 ); + + Utf8::ToUtf32( utf8String.begin(), utf8String.end(), std::back_inserter( mString ) ); +} + +String::String( const char* ansiString, const std::locale& locale ) { + if ( ansiString ) { + std::size_t length = strlen( ansiString ); + if ( length > 0 ) { + mString.reserve( length + 1 ); + Utf32::FromAnsi( ansiString, ansiString + length, std::back_inserter( mString ), + locale ); + } + } +} + +String::String( const std::string& ansiString, const std::locale& locale ) { + mString.reserve( ansiString.length() + 1 ); + Utf32::FromAnsi( ansiString.begin(), ansiString.end(), std::back_inserter( mString ), locale ); +} + +#ifndef EFSW_NO_WIDECHAR +String::String( const wchar_t* wideString ) { + if ( wideString ) { + std::size_t length = std::wcslen( wideString ); + if ( length > 0 ) { + mString.reserve( length + 1 ); + Utf32::FromWide( wideString, wideString + length, std::back_inserter( mString ) ); + } + } +} + +String::String( const std::wstring& wideString ) { + mString.reserve( wideString.length() + 1 ); + Utf32::FromWide( wideString.begin(), wideString.end(), std::back_inserter( mString ) ); +} +#endif + +String::String( const StringBaseType* utf32String ) { + if ( utf32String ) + mString = utf32String; +} + +String::String( const StringType& utf32String ) : mString( utf32String ) {} + +String::String( const String& str ) : mString( str.mString ) {} + +String String::fromUtf8( const std::string& utf8String ) { + String::StringType utf32; + + utf32.reserve( utf8String.length() + 1 ); + + Utf8::ToUtf32( utf8String.begin(), utf8String.end(), std::back_inserter( utf32 ) ); + + return String( utf32 ); +} + +String::operator std::string() const { + return toAnsiString(); +} + +std::string String::toAnsiString( const std::locale& locale ) const { + // Prepare the output string + std::string output; + output.reserve( mString.length() + 1 ); + + // Convert + Utf32::ToAnsi( mString.begin(), mString.end(), std::back_inserter( output ), 0, locale ); + + return output; +} + +#ifndef EFSW_NO_WIDECHAR +std::wstring String::toWideString() const { + // Prepare the output string + std::wstring output; + output.reserve( mString.length() + 1 ); + + // Convert + Utf32::ToWide( mString.begin(), mString.end(), std::back_inserter( output ), 0 ); + + return output; +} +#endif + +std::string String::toUtf8() const { + // Prepare the output string + std::string output; + output.reserve( mString.length() + 1 ); + + // Convert + Utf32::toUtf8( mString.begin(), mString.end(), std::back_inserter( output ) ); + + return output; +} + +String& String::operator=( const String& right ) { + mString = right.mString; + return *this; +} + +String& String::operator=( const StringBaseType& right ) { + mString = right; + return *this; +} + +String& String::operator+=( const String& right ) { + mString += right.mString; + return *this; +} + +String& String::operator+=( const StringBaseType& right ) { + mString += right; + return *this; +} + +String::StringBaseType String::operator[]( std::size_t index ) const { + return mString[index]; +} + +String::StringBaseType& String::operator[]( std::size_t index ) { + return mString[index]; +} + +String::StringBaseType String::at( std::size_t index ) const { + return mString.at( index ); +} + +void String::push_back( StringBaseType c ) { + mString.push_back( c ); +} + +void String::swap( String& str ) { + mString.swap( str.mString ); +} + +void String::clear() { + mString.clear(); +} + +std::size_t String::size() const { + return mString.size(); +} + +std::size_t String::length() const { + return mString.length(); +} + +bool String::empty() const { + return mString.empty(); +} + +void String::erase( std::size_t position, std::size_t count ) { + mString.erase( position, count ); +} + +String& String::insert( std::size_t position, const String& str ) { + mString.insert( position, str.mString ); + return *this; +} + +String& String::insert( std::size_t pos1, const String& str, std::size_t pos2, std::size_t n ) { + mString.insert( pos1, str.mString, pos2, n ); + return *this; +} + +String& String::insert( size_t pos1, const char* s, size_t n ) { + String tmp( s ); + + mString.insert( pos1, tmp.data(), n ); + + return *this; +} + +String& String::insert( size_t pos1, size_t n, char c ) { + mString.insert( pos1, n, c ); + return *this; +} + +String& String::insert( size_t pos1, const char* s ) { + String tmp( s ); + + mString.insert( pos1, tmp.data() ); + + return *this; +} + +String::Iterator String::insert( Iterator p, char c ) { + return mString.insert( p, c ); +} + +void String::insert( Iterator p, size_t n, char c ) { + mString.insert( p, n, c ); +} + +const String::StringBaseType* String::c_str() const { + return mString.c_str(); +} + +const String::StringBaseType* String::data() const { + return mString.data(); +} + +String::Iterator String::begin() { + return mString.begin(); +} + +String::ConstIterator String::begin() const { + return mString.begin(); +} + +String::Iterator String::end() { + return mString.end(); +} + +String::ConstIterator String::end() const { + return mString.end(); +} + +String::ReverseIterator String::rbegin() { + return mString.rbegin(); +} + +String::ConstReverseIterator String::rbegin() const { + return mString.rbegin(); +} + +String::ReverseIterator String::rend() { + return mString.rend(); +} + +String::ConstReverseIterator String::rend() const { + return mString.rend(); +} + +void String::resize( std::size_t n, StringBaseType c ) { + mString.resize( n, c ); +} + +void String::resize( std::size_t n ) { + mString.resize( n ); +} + +std::size_t String::max_size() const { + return mString.max_size(); +} + +void String::reserve( size_t res_arg ) { + mString.reserve( res_arg ); +} + +std::size_t String::capacity() const { + return mString.capacity(); +} + +String& String::assign( const String& str ) { + mString.assign( str.mString ); + return *this; +} + +String& String::assign( const String& str, size_t pos, size_t n ) { + mString.assign( str.mString, pos, n ); + return *this; +} + +String& String::assign( const char* s, size_t n ) { + String tmp( s ); + + mString.assign( tmp.mString ); + + return *this; +} + +String& String::assign( const char* s ) { + String tmp( s ); + + mString.assign( tmp.mString ); + + return *this; +} + +String& String::assign( size_t n, char c ) { + mString.assign( n, c ); + + return *this; +} + +String& String::append( const String& str ) { + mString.append( str.mString ); + + return *this; +} + +String& String::append( const String& str, size_t pos, size_t n ) { + mString.append( str.mString, pos, n ); + + return *this; +} + +String& String::append( const char* s, size_t n ) { + String tmp( s ); + + mString.append( tmp.mString ); + + return *this; +} + +String& String::append( const char* s ) { + String tmp( s ); + + mString.append( tmp.mString ); + + return *this; +} + +String& String::append( size_t n, char c ) { + mString.append( n, c ); + + return *this; +} + +String& String::append( std::size_t n, StringBaseType c ) { + mString.append( n, c ); + + return *this; +} + +String& String::replace( size_t pos1, size_t n1, const String& str ) { + mString.replace( pos1, n1, str.mString ); + + return *this; +} + +String& String::replace( Iterator i1, Iterator i2, const String& str ) { + mString.replace( i1, i2, str.mString ); + + return *this; +} + +String& String::replace( size_t pos1, size_t n1, const String& str, size_t pos2, size_t n2 ) { + mString.replace( pos1, n1, str.mString, pos2, n2 ); + + return *this; +} + +String& String::replace( size_t pos1, size_t n1, const char* s, size_t n2 ) { + String tmp( s ); + + mString.replace( pos1, n1, tmp.data(), n2 ); + + return *this; +} + +String& String::replace( Iterator i1, Iterator i2, const char* s, size_t n2 ) { + String tmp( s ); + + mString.replace( i1, i2, tmp.data(), n2 ); + + return *this; +} + +String& String::replace( size_t pos1, size_t n1, const char* s ) { + String tmp( s ); + + mString.replace( pos1, n1, tmp.mString ); + + return *this; +} + +String& String::replace( Iterator i1, Iterator i2, const char* s ) { + String tmp( s ); + + mString.replace( i1, i2, tmp.mString ); + + return *this; +} + +String& String::replace( size_t pos1, size_t n1, size_t n2, char c ) { + mString.replace( pos1, n1, n2, (StringBaseType)c ); + + return *this; +} + +String& String::replace( Iterator i1, Iterator i2, size_t n2, char c ) { + mString.replace( i1, i2, n2, (StringBaseType)c ); + + return *this; +} + +std::size_t String::find( const String& str, std::size_t start ) const { + return mString.find( str.mString, start ); +} + +std::size_t String::find( const char* s, std::size_t pos, std::size_t n ) const { + return find( String( s ), pos ); +} + +std::size_t String::find( const char* s, std::size_t pos ) const { + return find( String( s ), pos ); +} + +size_t String::find( char c, std::size_t pos ) const { + return mString.find( (StringBaseType)c, pos ); +} + +std::size_t String::rfind( const String& str, std::size_t pos ) const { + return mString.rfind( str.mString, pos ); +} + +std::size_t String::rfind( const char* s, std::size_t pos, std::size_t n ) const { + return rfind( String( s ), pos ); +} + +std::size_t String::rfind( const char* s, std::size_t pos ) const { + return rfind( String( s ), pos ); +} + +std::size_t String::rfind( char c, std::size_t pos ) const { + return mString.rfind( c, pos ); +} + +std::size_t String::copy( StringBaseType* s, std::size_t n, std::size_t pos ) const { + return mString.copy( s, n, pos ); +} + +String String::substr( std::size_t pos, std::size_t n ) const { + return String( mString.substr( pos, n ) ); +} + +int String::compare( const String& str ) const { + return mString.compare( str.mString ); +} + +int String::compare( const char* s ) const { + return compare( String( s ) ); +} + +int String::compare( std::size_t pos1, std::size_t n1, const String& str ) const { + return mString.compare( pos1, n1, str.mString ); +} + +int String::compare( std::size_t pos1, std::size_t n1, const char* s ) const { + return compare( pos1, n1, String( s ) ); +} + +int String::compare( std::size_t pos1, std::size_t n1, const String& str, std::size_t pos2, + std::size_t n2 ) const { + return mString.compare( pos1, n1, str.mString, pos2, n2 ); +} + +int String::compare( std::size_t pos1, std::size_t n1, const char* s, std::size_t n2 ) const { + return compare( pos1, n1, String( s ), 0, n2 ); +} + +std::size_t String::find_first_of( const String& str, std::size_t pos ) const { + return mString.find_first_of( str.mString, pos ); +} + +std::size_t String::find_first_of( const char* s, std::size_t pos, std::size_t n ) const { + return find_first_of( String( s ), pos ); +} + +std::size_t String::find_first_of( const char* s, std::size_t pos ) const { + return find_first_of( String( s ), pos ); +} + +std::size_t String::find_first_of( StringBaseType c, std::size_t pos ) const { + return mString.find_first_of( c, pos ); +} + +std::size_t String::find_last_of( const String& str, std::size_t pos ) const { + return mString.find_last_of( str.mString, pos ); +} + +std::size_t String::find_last_of( const char* s, std::size_t pos, std::size_t n ) const { + return find_last_of( String( s ), pos ); +} + +std::size_t String::find_last_of( const char* s, std::size_t pos ) const { + return find_last_of( String( s ), pos ); +} + +std::size_t String::find_last_of( StringBaseType c, std::size_t pos ) const { + return mString.find_last_of( c, pos ); +} + +std::size_t String::find_first_not_of( const String& str, std::size_t pos ) const { + return mString.find_first_not_of( str.mString, pos ); +} + +std::size_t String::find_first_not_of( const char* s, std::size_t pos, std::size_t n ) const { + return find_first_not_of( String( s ), pos ); +} + +std::size_t String::find_first_not_of( const char* s, std::size_t pos ) const { + return find_first_not_of( String( s ), pos ); +} + +std::size_t String::find_first_not_of( StringBaseType c, std::size_t pos ) const { + return mString.find_first_not_of( c, pos ); +} + +std::size_t String::find_last_not_of( const String& str, std::size_t pos ) const { + return mString.find_last_not_of( str.mString, pos ); +} + +std::size_t String::find_last_not_of( const char* s, std::size_t pos, std::size_t n ) const { + return find_last_not_of( String( s ), pos ); +} + +std::size_t String::find_last_not_of( const char* s, std::size_t pos ) const { + return find_last_not_of( String( s ), pos ); +} + +std::size_t String::find_last_not_of( StringBaseType c, std::size_t pos ) const { + return mString.find_last_not_of( c, pos ); +} + +bool operator==( const String& left, const String& right ) { + return left.mString == right.mString; +} + +bool operator!=( const String& left, const String& right ) { + return !( left == right ); +} + +bool operator<( const String& left, const String& right ) { + return left.mString < right.mString; +} + +bool operator>( const String& left, const String& right ) { + return right < left; +} + +bool operator<=( const String& left, const String& right ) { + return !( right < left ); +} + +bool operator>=( const String& left, const String& right ) { + return !( left < right ); +} + +String operator+( const String& left, const String& right ) { + String string = left; + string += right; + + return string; +} + +} // namespace efsw diff --git a/src/efsw/String.hpp b/src/efsw/String.hpp new file mode 100644 index 0000000..b42b945 --- /dev/null +++ b/src/efsw/String.hpp @@ -0,0 +1,630 @@ +/** NOTE: + * This code is based on the Utf implementation from SFML2. License zlib/png ( + *http://www.sfml-dev.org/license.php ) The class was modified to fit efsw own needs. This is not + *the original implementation from SFML2. Functions and methods are the same that in std::string to + *facilitate portability. + **/ + +#ifndef EFSW_STRING_HPP +#define EFSW_STRING_HPP + +#include +#include +#include +#include +#include +#include +#include +#include + +namespace efsw { + +/** @brief Utility string class that automatically handles conversions between types and encodings + * **/ +class String { + public: + typedef char32_t StringBaseType; + typedef std::basic_string StringType; + typedef StringType::iterator Iterator; //! Iterator type + typedef StringType::const_iterator ConstIterator; //! Constant iterator type + typedef StringType::reverse_iterator ReverseIterator; //! Reverse Iterator type + typedef StringType::const_reverse_iterator ConstReverseIterator; //! Constant iterator type + + static const std::size_t InvalidPos; ///< Represents an invalid position in the string + + template static std::string toStr( const T& i ) { + std::ostringstream ss; + ss << i; + return ss.str(); + } + + /** Converts from a string to type */ + template + static bool fromString( T& t, const std::string& s, + std::ios_base& ( *f )( std::ios_base& ) = std::dec ) { + std::istringstream iss( s ); + return !( iss >> f >> t ).fail(); + } + + /** Converts from a String to type */ + template + static bool fromString( T& t, const String& s, + std::ios_base& ( *f )( std::ios_base& ) = std::dec ) { + std::istringstream iss( s.toUtf8() ); + return !( iss >> f >> t ).fail(); + } + + /** Split a string and hold it on a vector */ + static std::vector split( const std::string& str, const char& splitchar, + const bool& pushEmptyString = false ); + + /** Split a string and hold it on a vector */ + static std::vector split( const String& str, const Uint32& splitchar, + const bool& pushEmptyString = false ); + + /** Determine if a string starts with the string passed + ** @param start The substring expected to start + ** @param str The string to compare + ** @return -1 if the substring is no in str, otherwise the size of the substring + */ + static int strStartsWith( const std::string& start, const std::string& str ); + + static int strStartsWith( const String& start, const String& str ); + + /** @brief Construct from an UTF-8 string to UTF-32 according + ** @param uf8String UTF-8 string to convert + **/ + static String fromUtf8( const std::string& utf8String ); + + /** @brief Default constructor + ** This constructor creates an empty string. + **/ + String(); + + /** @brief Construct from a single ANSI character and a locale + ** The source character is converted to UTF-32 according + ** to the given locale. If you want to use the current global + ** locale, rather use the other constructor. + ** @param ansiChar ANSI character to convert + ** @param locale Locale to use for conversion + **/ + String( char ansiChar, const std::locale& locale = std::locale() ); + +#ifndef EFSW_NO_WIDECHAR + /** @brief Construct from single wide character + ** @param wideChar Wide character to convert + **/ + String( wchar_t wideChar ); +#endif + + /** @brief Construct from single UTF-32 character + ** @param utf32Char UTF-32 character to convert + **/ + String( StringBaseType utf32Char ); + + /** @brief Construct from an from a null-terminated C-style UTF-8 string to UTF-32 + ** @param uf8String UTF-8 string to convert + **/ + String( const char* uf8String ); + + /** @brief Construct from an UTF-8 string to UTF-32 according + ** @param uf8String UTF-8 string to convert + **/ + String( const std::string& utf8String ); + + /** @brief Construct from a null-terminated C-style ANSI string and a locale + ** The source string is converted to UTF-32 according + ** to the given locale. If you want to use the current global + ** locale, rather use the other constructor. + ** @param ansiString ANSI string to convert + ** @param locale Locale to use for conversion + **/ + String( const char* ansiString, const std::locale& locale ); + + /** @brief Construct from an ANSI string and a locale + ** The source string is converted to UTF-32 according + ** to the given locale. If you want to use the current global + ** locale, rather use the other constructor. + ** @param ansiString ANSI string to convert + ** @param locale Locale to use for conversion + **/ + String( const std::string& ansiString, const std::locale& locale ); + +#ifndef EFSW_NO_WIDECHAR + /** @brief Construct from null-terminated C-style wide string + ** @param wideString Wide string to convert + **/ + String( const wchar_t* wideString ); + + /** @brief Construct from a wide string + ** @param wideString Wide string to convert + **/ + String( const std::wstring& wideString ); +#endif + + /** @brief Construct from a null-terminated C-style UTF-32 string + ** @param utf32String UTF-32 string to assign + **/ + String( const StringBaseType* utf32String ); + + /** @brief Construct from an UTF-32 string + ** @param utf32String UTF-32 string to assign + **/ + String( const StringType& utf32String ); + + /** @brief Copy constructor + ** @param str Instance to copy + **/ + String( const String& str ); + + /** @brief Implicit cast operator to std::string (ANSI string) + ** The current global locale is used for conversion. If you + ** want to explicitely specify a locale, see toAnsiString. + ** Characters that do not fit in the target encoding are + ** discarded from the returned string. + ** This operator is defined for convenience, and is equivalent + ** to calling toAnsiString(). + ** @return Converted ANSI string + ** @see toAnsiString, operator String + **/ + operator std::string() const; + + /** @brief Convert the unicode string to an ANSI string + ** The UTF-32 string is converted to an ANSI string in + ** the encoding defined by \a locale. If you want to use + ** the current global locale, see the other overload + ** of toAnsiString. + ** Characters that do not fit in the target encoding are + ** discarded from the returned string. + ** @param locale Locale to use for conversion + ** @return Converted ANSI string + ** @see toWideString, operator std::string + **/ + std::string toAnsiString( const std::locale& locale = std::locale() ) const; + +#ifndef EFSW_NO_WIDECHAR + /** @brief Convert the unicode string to a wide string + ** Characters that do not fit in the target encoding are + ** discarded from the returned string. + ** @return Converted wide string + ** @see toAnsiString, operator String + **/ + std::wstring toWideString() const; +#endif + + std::string toUtf8() const; + + /** @brief Overload of assignment operator + ** @param right Instance to assign + ** @return Reference to self + **/ + String& operator=( const String& right ); + + String& operator=( const StringBaseType& right ); + + /** @brief Overload of += operator to append an UTF-32 string + ** @param right String to append + ** @return Reference to self + **/ + String& operator+=( const String& right ); + + String& operator+=( const StringBaseType& right ); + + /** @brief Overload of [] operator to access a character by its position + ** This function provides read-only access to characters. + ** Note: this function doesn't throw if \a index is out of range. + ** @param index Index of the character to get + ** @return Character at position \a index + **/ + StringBaseType operator[]( std::size_t index ) const; + + /** @brief Overload of [] operator to access a character by its position + ** This function provides read and write access to characters. + ** Note: this function doesn't throw if \a index is out of range. + ** @param index Index of the character to get + ** @return Reference to the character at position \a index + **/ + + StringBaseType& operator[]( std::size_t index ); + + /** @brief Get character in string + ** Performs a range check, throwing an exception of type out_of_range in case that pos is not an + *actual position in the string. + ** @return The character at position pos in the string. + */ + StringBaseType at( std::size_t index ) const; + + /** @brief clear the string + ** This function removes all the characters from the string. + ** @see empty, erase + **/ + void clear(); + + /** @brief Get the size of the string + ** @return Number of characters in the string + ** @see empty + **/ + std::size_t size() const; + + /** @see size() */ + std::size_t length() const; + + /** @brief Check whether the string is empty or not + ** @return True if the string is empty (i.e. contains no character) + ** @see clear, size + **/ + bool empty() const; + + /** @brief Erase one or more characters from the string + ** This function removes a sequence of \a count characters + ** starting from \a position. + ** @param position Position of the first character to erase + ** @param count Number of characters to erase + **/ + void erase( std::size_t position, std::size_t count = 1 ); + + /** @brief Insert one or more characters into the string + ** This function inserts the characters of \a str + ** into the string, starting from \a position. + ** @param position Position of insertion + ** @param str Characters to insert + **/ + String& insert( std::size_t position, const String& str ); + + String& insert( std::size_t pos1, const String& str, std::size_t pos2, std::size_t n ); + + String& insert( std::size_t pos1, const char* s, std::size_t n ); + + String& insert( std::size_t pos1, const char* s ); + + String& insert( std::size_t pos1, size_t n, char c ); + + Iterator insert( Iterator p, char c ); + + void insert( Iterator p, std::size_t n, char c ); + + template + void insert( Iterator p, InputIterator first, InputIterator last ) { + mString.insert( p, first, last ); + } + + /** @brief Find a sequence of one or more characters in the string + ** This function searches for the characters of \a str + ** into the string, starting from \a start. + ** @param str Characters to find + ** @param start Where to begin searching + ** @return Position of \a str in the string, or String::InvalidPos if not found + **/ + std::size_t find( const String& str, std::size_t start = 0 ) const; + + std::size_t find( const char* s, std::size_t pos, std::size_t n ) const; + + std::size_t find( const char* s, std::size_t pos = 0 ) const; + + std::size_t find( char c, std::size_t pos = 0 ) const; + + /** @brief Get a pointer to the C-style array of characters + ** This functions provides a read-only access to a + ** null-terminated C-style representation of the string. + ** The returned pointer is temporary and is meant only for + ** immediate use, thus it is not recommended to store it. + ** @return Read-only pointer to the array of characters + **/ + const StringBaseType* c_str() const; + + /** @brief Get string data + ** Notice that no terminating null character is appended (see member c_str for such a + *functionality). + ** The returned array points to an internal location which should not be modified directly in + *the program. + ** Its contents are guaranteed to remain unchanged only until the next call to a non-constant + *member function of the string object. + ** @return Pointer to an internal array containing the same content as the string. + **/ + const StringBaseType* data() const; + + /** @brief Return an iterator to the beginning of the string + ** @return Read-write iterator to the beginning of the string characters + ** @see end + **/ + Iterator begin(); + + /** @brief Return an iterator to the beginning of the string + ** @return Read-only iterator to the beginning of the string characters + ** @see end + **/ + ConstIterator begin() const; + + /** @brief Return an iterator to the beginning of the string + ** The end iterator refers to 1 position past the last character; + ** thus it represents an invalid character and should never be + ** accessed. + ** @return Read-write iterator to the end of the string characters + ** @see begin + **/ + Iterator end(); + + /** @brief Return an iterator to the beginning of the string + ** The end iterator refers to 1 position past the last character; + ** thus it represents an invalid character and should never be + ** accessed. + ** @return Read-only iterator to the end of the string characters + ** @see begin + **/ + ConstIterator end() const; + + /** @brief Return an reverse iterator to the beginning of the string + ** @return Read-write reverse iterator to the beginning of the string characters + ** @see end + **/ + ReverseIterator rbegin(); + + /** @brief Return an reverse iterator to the beginning of the string + ** @return Read-only reverse iterator to the beginning of the string characters + ** @see end + **/ + ConstReverseIterator rbegin() const; + + /** @brief Return an reverse iterator to the beginning of the string + ** The end reverse iterator refers to 1 position past the last character; + ** thus it represents an invalid character and should never be + ** accessed. + ** @return Read-write reverse iterator to the end of the string characters + ** @see begin + **/ + ReverseIterator rend(); + + /** @brief Return an reverse iterator to the beginning of the string + ** The end reverse iterator refers to 1 position past the last character; + ** thus it represents an invalid character and should never be + ** accessed. + ** @return Read-only reverse iterator to the end of the string characters + ** @see begin + **/ + ConstReverseIterator rend() const; + + /** @brief Resize String */ + void resize( std::size_t n, StringBaseType c ); + + /** @brief Resize String */ + void resize( std::size_t n ); + + /** @return Maximum size of string */ + std::size_t max_size() const; + + /** @brief Request a change in capacity */ + void reserve( size_t res_arg = 0 ); + + /** @return Size of allocated storage */ + std::size_t capacity() const; + + /** @brief Append character to string */ + void push_back( StringBaseType c ); + + /** @brief Swap contents with another string */ + void swap( String& str ); + + String& assign( const String& str ); + + String& assign( const String& str, std::size_t pos, std::size_t n ); + + String& assign( const char* s, std::size_t n ); + + String& assign( const char* s ); + + String& assign( std::size_t n, char c ); + + template String& assign( InputIterator first, InputIterator last ) { + mString.assign( first, last ); + return *this; + } + + String& append( const String& str ); + + String& append( const String& str, std::size_t pos, std::size_t n ); + + String& append( const char* s, std::size_t n ); + + String& append( const char* s ); + + String& append( std::size_t n, char c ); + + String& append( std::size_t n, StringBaseType c ); + + template String& append( InputIterator first, InputIterator last ) { + mString.append( first, last ); + return *this; + } + + String& replace( std::size_t pos1, std::size_t n1, const String& str ); + + String& replace( Iterator i1, Iterator i2, const String& str ); + + String& replace( std::size_t pos1, std::size_t n1, const String& str, std::size_t pos2, + std::size_t n2 ); + + String& replace( std::size_t pos1, std::size_t n1, const char* s, std::size_t n2 ); + + String& replace( Iterator i1, Iterator i2, const char* s, std::size_t n2 ); + + String& replace( std::size_t pos1, std::size_t n1, const char* s ); + + String& replace( Iterator i1, Iterator i2, const char* s ); + + String& replace( std::size_t pos1, std::size_t n1, std::size_t n2, char c ); + + String& replace( Iterator i1, Iterator i2, std::size_t n2, char c ); + + template + String& replace( Iterator i1, Iterator i2, InputIterator j1, InputIterator j2 ) { + mString.replace( i1, i2, j1, j2 ); + return *this; + } + + std::size_t rfind( const String& str, std::size_t pos = StringType::npos ) const; + + std::size_t rfind( const char* s, std::size_t pos, std::size_t n ) const; + + std::size_t rfind( const char* s, std::size_t pos = StringType::npos ) const; + + std::size_t rfind( char c, std::size_t pos = StringType::npos ) const; + + String substr( std::size_t pos = 0, std::size_t n = StringType::npos ) const; + + std::size_t copy( StringBaseType* s, std::size_t n, std::size_t pos = 0 ) const; + + int compare( const String& str ) const; + + int compare( const char* s ) const; + + int compare( std::size_t pos1, std::size_t n1, const String& str ) const; + + int compare( std::size_t pos1, std::size_t n1, const char* s ) const; + + int compare( std::size_t pos1, std::size_t n1, const String& str, std::size_t pos2, + std::size_t n2 ) const; + + int compare( std::size_t pos1, std::size_t n1, const char* s, std::size_t n2 ) const; + + std::size_t find_first_of( const String& str, std::size_t pos = 0 ) const; + + std::size_t find_first_of( const char* s, std::size_t pos, std::size_t n ) const; + + std::size_t find_first_of( const char* s, std::size_t pos = 0 ) const; + + std::size_t find_first_of( StringBaseType c, std::size_t pos = 0 ) const; + + std::size_t find_last_of( const String& str, std::size_t pos = StringType::npos ) const; + + std::size_t find_last_of( const char* s, std::size_t pos, std::size_t n ) const; + + std::size_t find_last_of( const char* s, std::size_t pos = StringType::npos ) const; + + std::size_t find_last_of( StringBaseType c, std::size_t pos = StringType::npos ) const; + + std::size_t find_first_not_of( const String& str, std::size_t pos = 0 ) const; + + std::size_t find_first_not_of( const char* s, std::size_t pos, std::size_t n ) const; + + std::size_t find_first_not_of( const char* s, std::size_t pos = 0 ) const; + + std::size_t find_first_not_of( StringBaseType c, std::size_t pos = 0 ) const; + + std::size_t find_last_not_of( const String& str, std::size_t pos = StringType::npos ) const; + + std::size_t find_last_not_of( const char* s, std::size_t pos, std::size_t n ) const; + + std::size_t find_last_not_of( const char* s, std::size_t pos = StringType::npos ) const; + + std::size_t find_last_not_of( StringBaseType c, std::size_t pos = StringType::npos ) const; + + private: + friend bool operator==( const String& left, const String& right ); + friend bool operator<( const String& left, const String& right ); + + StringType mString; ///< Internal string of UTF-32 characters +}; + +/** @relates String +** @brief Overload of == operator to compare two UTF-32 strings +** @param left Left operand (a string) +** @param right Right operand (a string) +** @return True if both strings are equal +**/ +bool operator==( const String& left, const String& right ); + +/** @relates String +** @brief Overload of != operator to compare two UTF-32 strings +** @param left Left operand (a string) +** @param right Right operand (a string) +** @return True if both strings are different +**/ +bool operator!=( const String& left, const String& right ); + +/** @relates String +** @brief Overload of < operator to compare two UTF-32 strings +** @param left Left operand (a string) +** @param right Right operand (a string) +** @return True if \a left is alphabetically lesser than \a right +**/ +bool operator<( const String& left, const String& right ); + +/** @relates String +** @brief Overload of > operator to compare two UTF-32 strings +** @param left Left operand (a string) +** @param right Right operand (a string) +** @return True if \a left is alphabetically greater than \a right +**/ +bool operator>( const String& left, const String& right ); + +/** @relates String +** @brief Overload of <= operator to compare two UTF-32 strings +** @param left Left operand (a string) +** @param right Right operand (a string) +** @return True if \a left is alphabetically lesser or equal than \a right +**/ +bool operator<=( const String& left, const String& right ); + +/** @relates String +** @brief Overload of >= operator to compare two UTF-32 strings +** @param left Left operand (a string) +** @param right Right operand (a string) +** @return True if \a left is alphabetically greater or equal than \a right +**/ +bool operator>=( const String& left, const String& right ); + +/** @relates String +** @brief Overload of binary + operator to concatenate two strings +** @param left Left operand (a string) +** @param right Right operand (a string) +** @return Concatenated string +**/ +String operator+( const String& left, const String& right ); + +} // namespace efsw + +#endif + +/** @class efsw::String +** @ingroup system +** efsw::String is a utility string class defined mainly for +** convenience. It is a Unicode string (implemented using +** UTF-32), thus it can store any character in the world +** (european, chinese, arabic, hebrew, etc.). +** It automatically handles conversions from/to ANSI and +** wide strings, so that you can work with standard string +** classes and still be compatible with functions taking a +** efsw::String. +** @code +** efsw::String s; +** std::string s1 = s; // automatically converted to ANSI string +** String s2 = s; // automatically converted to wide string +** s = "hello"; // automatically converted from ANSI string +** s = L"hello"; // automatically converted from wide string +** s += 'a'; // automatically converted from ANSI string +** s += L'a'; // automatically converted from wide string +** @endcode +** Conversions involving ANSI strings use the default user locale. However +** it is possible to use a custom locale if necessary: +** @code +** std::locale locale; +** efsw::String s; +** ... +** std::string s1 = s.toAnsiString(locale); +** s = efsw::String("hello", locale); +** @endcode +** +** efsw::String defines the most important functions of the +** standard std::string class: removing, random access, iterating, +** appending, comparing, etc. However it is a simple class +** provided for convenience, and you may have to consider using +** a more optimized class if your program requires complex string +** handling. The automatic conversion functions will then take +** care of converting your string to efsw::String whenever EE +** requires it. +** +** Please note that EE also defines a low-level, generic +** interface for Unicode handling, see the efsw::Utf classes. +** +** All credits to Laurent Gomila, i just modified and expanded a little bit the implementation. +**/ diff --git a/src/efsw/System.cpp b/src/efsw/System.cpp new file mode 100644 index 0000000..ba68bf4 --- /dev/null +++ b/src/efsw/System.cpp @@ -0,0 +1,22 @@ +#include +#include + +namespace efsw { + +void System::sleep( const unsigned long& ms ) { + Platform::System::sleep( ms ); +} + +std::string System::getProcessPath() { + return Platform::System::getProcessPath(); +} + +void System::maxFD() { + Platform::System::maxFD(); +} + +Uint64 System::getMaxFD() { + return Platform::System::getMaxFD(); +} + +} // namespace efsw diff --git a/src/efsw/System.hpp b/src/efsw/System.hpp new file mode 100644 index 0000000..498e121 --- /dev/null +++ b/src/efsw/System.hpp @@ -0,0 +1,25 @@ +#ifndef EFSW_SYSTEM_HPP +#define EFSW_SYSTEM_HPP + +#include + +namespace efsw { + +class System { + public: + /// Sleep for x milliseconds + static void sleep( const unsigned long& ms ); + + /// @return The process binary path + static std::string getProcessPath(); + + /// Maximize the number of file descriptors allowed per process in the current OS + static void maxFD(); + + /// @return The number of supported file descriptors for the process + static Uint64 getMaxFD(); +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/Thread.hpp b/src/efsw/Thread.hpp new file mode 100644 index 0000000..5a5d470 --- /dev/null +++ b/src/efsw/Thread.hpp @@ -0,0 +1,49 @@ +#ifndef EFSW_THREAD_HPP +#define EFSW_THREAD_HPP + +#include +#include +#include +#include + +namespace efsw { + +/** @brief Thread manager class */ +class Thread { + public: + + Thread(std::function fun) + : mFun{std::move(fun)} + { + } + + ~Thread() + { + wait(); + } + + /** Launch the thread */ + void launch() + { + if (!mThread) + mThread.reset(new std::thread{std::move(mFun)}); + } + + /** Wait the thread until end */ + void wait() + { + if (mThread) + { + mThread->join(); + mThread.reset(); + } + } +private: + + std::unique_ptr mThread; + std::function mFun; +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/Utf.hpp b/src/efsw/Utf.hpp new file mode 100644 index 0000000..1b042cd --- /dev/null +++ b/src/efsw/Utf.hpp @@ -0,0 +1,721 @@ +/** NOTE: + * This code is based on the Utf implementation from SFML2. License zlib/png ( + *http://www.sfml-dev.org/license.php ) The class was modified to fit efsw own needs. This is not + *the original implementation from SFML2. + * */ + +#ifndef EFSW_UTF_HPP +#define EFSW_UTF_HPP + +//////////////////////////////////////////////////////////// +// Headers +//////////////////////////////////////////////////////////// +#include +#include +#include +#include + +namespace efsw { + +template class Utf; + +//////////////////////////////////////////////////////////// +/// \brief Specialization of the Utf template for UTF-8 +/// +//////////////////////////////////////////////////////////// +template <> class Utf<8> { + public: + //////////////////////////////////////////////////////////// + /// \brief Decode a single UTF-8 character + /// + /// Decoding a character means finding its unique 32-bits + /// code (called the codepoint) in the Unicode standard. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Codepoint of the decoded UTF-8 character + /// \param replacement Replacement character to use in case the UTF-8 sequence is invalid + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template + static In Decode( In begin, In end, Uint32& output, Uint32 replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Encode a single UTF-8 character + /// + /// Encoding a character means converting a unique 32-bits + /// code (called the codepoint) in the target encoding, UTF-8. + /// + /// \param input Codepoint to encode as UTF-8 + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to UTF-8 (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out Encode( Uint32 input, Out output, Uint8 replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Advance to the next UTF-8 character + /// + /// This function is necessary for multi-elements encodings, as + /// a single character may use more than 1 storage element. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template static In Next( In begin, In end ); + + //////////////////////////////////////////////////////////// + /// \brief Count the number of characters of a UTF-8 sequence + /// + /// This function is necessary for multi-elements encodings, as + /// a single character may use more than 1 storage element, thus the + /// total size can be different from (begin - end). + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template static std::size_t Count( In begin, In end ); + + //////////////////////////////////////////////////////////// + /// \brief Convert an ANSI characters range to UTF-8 + /// + /// The current global locale will be used by default, unless you + /// pass a custom one in the \a locale parameter. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out FromAnsi( In begin, In end, Out output, const std::locale& locale = std::locale() ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a wide characters range to UTF-8 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out FromWide( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a latin-1 (ISO-5589-1) characters range to UTF-8 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out FromLatin1( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-8 characters range to ANSI characters + /// + /// The current global locale will be used by default, unless you + /// pass a custom one in the \a locale parameter. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to ANSI (use 0 to skip them) + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToAnsi( In begin, In end, Out output, char replacement = 0, + const std::locale& locale = std::locale() ); + +#ifndef EFSW_NO_WIDECHAR + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-8 characters range to wide characters + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to wide (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToWide( In begin, In end, Out output, wchar_t replacement = 0 ); +#endif + + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-8 characters range to latin-1 (ISO-5589-1) characters + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to wide (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToLatin1( In begin, In end, Out output, char replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-8 characters range to UTF-8 + /// + /// This functions does nothing more than a direct copy; + /// it is defined only to provide the same interface as other + /// specializations of the efsw::Utf<> template, and allow + /// generic code to be written on top of it. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out toUtf8( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-8 characters range to UTF-16 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out ToUtf16( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-8 characters range to UTF-32 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out ToUtf32( In begin, In end, Out output ); +}; + +//////////////////////////////////////////////////////////// +/// \brief Specialization of the Utf template for UTF-16 +/// +//////////////////////////////////////////////////////////// +template <> class Utf<16> { + public: + //////////////////////////////////////////////////////////// + /// \brief Decode a single UTF-16 character + /// + /// Decoding a character means finding its unique 32-bits + /// code (called the codepoint) in the Unicode standard. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Codepoint of the decoded UTF-16 character + /// \param replacement Replacement character to use in case the UTF-8 sequence is invalid + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template + static In Decode( In begin, In end, Uint32& output, Uint32 replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Encode a single UTF-16 character + /// + /// Encoding a character means converting a unique 32-bits + /// code (called the codepoint) in the target encoding, UTF-16. + /// + /// \param input Codepoint to encode as UTF-16 + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to UTF-16 (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out Encode( Uint32 input, Out output, Uint16 replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Advance to the next UTF-16 character + /// + /// This function is necessary for multi-elements encodings, as + /// a single character may use more than 1 storage element. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template static In Next( In begin, In end ); + + //////////////////////////////////////////////////////////// + /// \brief Count the number of characters of a UTF-16 sequence + /// + /// This function is necessary for multi-elements encodings, as + /// a single character may use more than 1 storage element, thus the + /// total size can be different from (begin - end). + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template static std::size_t Count( In begin, In end ); + + //////////////////////////////////////////////////////////// + /// \brief Convert an ANSI characters range to UTF-16 + /// + /// The current global locale will be used by default, unless you + /// pass a custom one in the \a locale parameter. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out FromAnsi( In begin, In end, Out output, const std::locale& locale = std::locale() ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a wide characters range to UTF-16 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out FromWide( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a latin-1 (ISO-5589-1) characters range to UTF-16 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out FromLatin1( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-16 characters range to ANSI characters + /// + /// The current global locale will be used by default, unless you + /// pass a custom one in the \a locale parameter. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to ANSI (use 0 to skip them) + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToAnsi( In begin, In end, Out output, char replacement = 0, + const std::locale& locale = std::locale() ); + +#ifndef EFSW_NO_WIDECHAR + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-16 characters range to wide characters + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to wide (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToWide( In begin, In end, Out output, wchar_t replacement = 0 ); +#endif + + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-16 characters range to latin-1 (ISO-5589-1) characters + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to wide (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToLatin1( In begin, In end, Out output, char replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-16 characters range to UTF-8 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out toUtf8( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-16 characters range to UTF-16 + /// + /// This functions does nothing more than a direct copy; + /// it is defined only to provide the same interface as other + /// specializations of the efsw::Utf<> template, and allow + /// generic code to be written on top of it. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out ToUtf16( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-16 characters range to UTF-32 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out ToUtf32( In begin, In end, Out output ); +}; + +//////////////////////////////////////////////////////////// +/// \brief Specialization of the Utf template for UTF-32 +/// +//////////////////////////////////////////////////////////// +template <> class Utf<32> { + public: + //////////////////////////////////////////////////////////// + /// \brief Decode a single UTF-32 character + /// + /// Decoding a character means finding its unique 32-bits + /// code (called the codepoint) in the Unicode standard. + /// For UTF-32, the character value is the same as the codepoint. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Codepoint of the decoded UTF-32 character + /// \param replacement Replacement character to use in case the UTF-8 sequence is invalid + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template + static In Decode( In begin, In end, Uint32& output, Uint32 replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Encode a single UTF-32 character + /// + /// Encoding a character means converting a unique 32-bits + /// code (called the codepoint) in the target encoding, UTF-32. + /// For UTF-32, the codepoint is the same as the character value. + /// + /// \param input Codepoint to encode as UTF-32 + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to UTF-32 (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out Encode( Uint32 input, Out output, Uint32 replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Advance to the next UTF-32 character + /// + /// This function is trivial for UTF-32, which can store + /// every character in a single storage element. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template static In Next( In begin, In end ); + + //////////////////////////////////////////////////////////// + /// \brief Count the number of characters of a UTF-32 sequence + /// + /// This function is trivial for UTF-32, which can store + /// every character in a single storage element. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// + /// \return Iterator pointing to one past the last read element of the input sequence + /// + //////////////////////////////////////////////////////////// + template static std::size_t Count( In begin, In end ); + + //////////////////////////////////////////////////////////// + /// \brief Convert an ANSI characters range to UTF-32 + /// + /// The current global locale will be used by default, unless you + /// pass a custom one in the \a locale parameter. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out FromAnsi( In begin, In end, Out output, const std::locale& locale = std::locale() ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a wide characters range to UTF-32 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out FromWide( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a latin-1 (ISO-5589-1) characters range to UTF-32 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out FromLatin1( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-32 characters range to ANSI characters + /// + /// The current global locale will be used by default, unless you + /// pass a custom one in the \a locale parameter. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to ANSI (use 0 to skip them) + /// \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToAnsi( In begin, In end, Out output, char replacement = 0, + const std::locale& locale = std::locale() ); + +#ifndef EFSW_NO_WIDECHAR + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-32 characters range to wide characters + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to wide (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToWide( In begin, In end, Out output, wchar_t replacement = 0 ); +#endif + + //////////////////////////////////////////////////////////// + /// \brief Convert an UTF-16 characters range to latin-1 (ISO-5589-1) characters + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement for characters not convertible to wide (use 0 to skip them) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out ToLatin1( In begin, In end, Out output, char replacement = 0 ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-32 characters range to UTF-8 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out toUtf8( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-32 characters range to UTF-16 + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out ToUtf16( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Convert a UTF-32 characters range to UTF-32 + /// + /// This functions does nothing more than a direct copy; + /// it is defined only to provide the same interface as other + /// specializations of the efsw::Utf<> template, and allow + /// generic code to be written on top of it. + /// + /// \param begin Iterator pointing to the beginning of the input sequence + /// \param end Iterator pointing to the end of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template static Out ToUtf32( In begin, In end, Out output ); + + //////////////////////////////////////////////////////////// + /// \brief Decode a single ANSI character to UTF-32 + /// + /// This function does not exist in other specializations + /// of efsw::Utf<>, it is defined for convenience (it is used by + /// several other conversion functions). + /// + /// \param input Input ANSI character + /// \param locale Locale to use for conversion + /// + /// \return Converted character + /// + //////////////////////////////////////////////////////////// + template + static Uint32 DecodeAnsi( In input, const std::locale& locale = std::locale() ); + + //////////////////////////////////////////////////////////// + /// \brief Decode a single wide character to UTF-32 + /// + /// This function does not exist in other specializations + /// of efsw::Utf<>, it is defined for convenience (it is used by + /// several other conversion functions). + /// + /// \param input Input wide character + /// + /// \return Converted character + /// + //////////////////////////////////////////////////////////// + template static Uint32 DecodeWide( In input ); + + //////////////////////////////////////////////////////////// + /// \brief Encode a single UTF-32 character to ANSI + /// + /// This function does not exist in other specializations + /// of efsw::Utf<>, it is defined for convenience (it is used by + /// several other conversion functions). + /// + /// \param codepoint Iterator pointing to the beginning of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement if the input character is not convertible to ANSI (use 0 to + /// skip it) \param locale Locale to use for conversion + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out EncodeAnsi( Uint32 codepoint, Out output, char replacement = 0, + const std::locale& locale = std::locale() ); + +#ifndef EFSW_NO_WIDECHAR + //////////////////////////////////////////////////////////// + /// \brief Encode a single UTF-32 character to wide + /// + /// This function does not exist in other specializations + /// of efsw::Utf<>, it is defined for convenience (it is used by + /// several other conversion functions). + /// + /// \param codepoint Iterator pointing to the beginning of the input sequence + /// \param output Iterator pointing to the beginning of the output sequence + /// \param replacement Replacement if the input character is not convertible to wide (use 0 to + /// skip it) + /// + /// \return Iterator to the end of the output sequence which has been written + /// + //////////////////////////////////////////////////////////// + template + static Out EncodeWide( Uint32 codepoint, Out output, wchar_t replacement = 0 ); +#endif +}; + +#include "Utf.inl" + +// Make typedefs to get rid of the template syntax +typedef Utf<8> Utf8; +typedef Utf<16> Utf16; +typedef Utf<32> Utf32; + +} // namespace efsw +#endif + +//////////////////////////////////////////////////////////// +/// \class efsw::Utf +/// \ingroup system +/// +/// Utility class providing generic functions for UTF conversions. +/// +/// efsw::Utf is a low-level, generic interface for counting, iterating, +/// encoding and decoding Unicode characters and strings. It is able +/// to handle ANSI, wide, UTF-8, UTF-16 and UTF-32 encodings. +/// +/// efsw::Utf functions are all static, these classes are not meant to +/// be instanciated. All the functions are template, so that you +/// can use any character / string type for a given encoding. +/// +/// It has 3 specializations: +/// \li efsw::Utf<8> (typedef'd to efsw::Utf8) +/// \li efsw::Utf<16> (typedef'd to efsw::Utf16) +/// \li efsw::Utf<32> (typedef'd to efsw::Utf32) +/// +//////////////////////////////////////////////////////////// diff --git a/src/efsw/Utf.inl b/src/efsw/Utf.inl new file mode 100644 index 0000000..ef71bc8 --- /dev/null +++ b/src/efsw/Utf.inl @@ -0,0 +1,576 @@ +// References : +// http://www.unicode.org/ +// http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.c +// http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.h +// http://people.w3.org/rishida/scripts/uniview/conversion +//////////////////////////////////////////////////////////// + +template In Utf<8>::Decode( In begin, In end, Uint32& output, Uint32 replacement ) { + // Some useful precomputed data + static const int trailing[256] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5 }; + static const Uint32 offsets[6] = { 0x00000000, 0x00003080, 0x000E2080, + 0x03C82080, 0xFA082080, 0x82082080 }; + + // Decode the character + int trailingBytes = trailing[static_cast( *begin )]; + if ( begin + trailingBytes < end ) { + output = 0; + switch ( trailingBytes ) { + case 5: + output += static_cast( *begin++ ); + output <<= 6; + case 4: + output += static_cast( *begin++ ); + output <<= 6; + case 3: + output += static_cast( *begin++ ); + output <<= 6; + case 2: + output += static_cast( *begin++ ); + output <<= 6; + case 1: + output += static_cast( *begin++ ); + output <<= 6; + case 0: + output += static_cast( *begin++ ); + } + output -= offsets[trailingBytes]; + } else { + // Incomplete character + begin = end; + output = replacement; + } + + return begin; +} + +template Out Utf<8>::Encode( Uint32 input, Out output, Uint8 replacement ) { + // Some useful precomputed data + static const Uint8 firstBytes[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC }; + + // Encode the character + if ( ( input > 0x0010FFFF ) || ( ( input >= 0xD800 ) && ( input <= 0xDBFF ) ) ) { + // Invalid character + if ( replacement ) + *output++ = replacement; + } else { + // Valid character + + // Get the number of bytes to write + int bytesToWrite = 1; + if ( input < 0x80 ) + bytesToWrite = 1; + else if ( input < 0x800 ) + bytesToWrite = 2; + else if ( input < 0x10000 ) + bytesToWrite = 3; + else if ( input <= 0x0010FFFF ) + bytesToWrite = 4; + + // Extract the bytes to write + Uint8 bytes[4]; + switch ( bytesToWrite ) { + case 4: + bytes[3] = static_cast( ( input | 0x80 ) & 0xBF ); + input >>= 6; + case 3: + bytes[2] = static_cast( ( input | 0x80 ) & 0xBF ); + input >>= 6; + case 2: + bytes[1] = static_cast( ( input | 0x80 ) & 0xBF ); + input >>= 6; + case 1: + bytes[0] = static_cast( input | firstBytes[bytesToWrite] ); + } + + // Add them to the output + const Uint8* currentByte = bytes; + switch ( bytesToWrite ) { + case 4: + *output++ = *currentByte++; + case 3: + *output++ = *currentByte++; + case 2: + *output++ = *currentByte++; + case 1: + *output++ = *currentByte++; + } + } + + return output; +} + +template In Utf<8>::Next( In begin, In end ) { + Uint32 codepoint; + return Decode( begin, end, codepoint ); +} + +template std::size_t Utf<8>::Count( In begin, In end ) { + std::size_t length = 0; + while ( begin < end ) { + begin = Next( begin, end ); + ++length; + } + + return length; +} + +template +Out Utf<8>::FromAnsi( In begin, In end, Out output, const std::locale& locale ) { + while ( begin < end ) { + Uint32 codepoint = Utf<32>::DecodeAnsi( *begin++, locale ); + output = Encode( codepoint, output ); + } + + return output; +} + +template Out Utf<8>::FromWide( In begin, In end, Out output ) { + while ( begin < end ) { + Uint32 codepoint = Utf<32>::DecodeWide( *begin++ ); + output = Encode( codepoint, output ); + } + + return output; +} + +template Out Utf<8>::FromLatin1( In begin, In end, Out output ) { + // Latin-1 is directly compatible with Unicode encodings, + // and can thus be treated as (a sub-range of) UTF-32 + while ( begin < end ) + output = Encode( *begin++, output ); + + return output; +} + +template +Out Utf<8>::ToAnsi( In begin, In end, Out output, char replacement, const std::locale& locale ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + output = Utf<32>::EncodeAnsi( codepoint, output, replacement, locale ); + } + + return output; +} + +#ifndef EFSW_NO_WIDECHAR +template +Out Utf<8>::ToWide( In begin, In end, Out output, wchar_t replacement ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + output = Utf<32>::EncodeWide( codepoint, output, replacement ); + } + + return output; +} +#endif + +template +Out Utf<8>::ToLatin1( In begin, In end, Out output, char replacement ) { + // Latin-1 is directly compatible with Unicode encodings, + // and can thus be treated as (a sub-range of) UTF-32 + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + *output++ = codepoint < 256 ? static_cast( codepoint ) : replacement; + } + + return output; +} + +template Out Utf<8>::toUtf8( In begin, In end, Out output ) { + while ( begin < end ) + *output++ = *begin++; + + return output; +} + +template Out Utf<8>::ToUtf16( In begin, In end, Out output ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + output = Utf<16>::Encode( codepoint, output ); + } + + return output; +} + +template Out Utf<8>::ToUtf32( In begin, In end, Out output ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + *output++ = codepoint; + } + + return output; +} + +template In Utf<16>::Decode( In begin, In end, Uint32& output, Uint32 replacement ) { + Uint16 first = *begin++; + + // If it's a surrogate pair, first convert to a single UTF-32 character + if ( ( first >= 0xD800 ) && ( first <= 0xDBFF ) ) { + if ( begin < end ) { + Uint32 second = *begin++; + if ( ( second >= 0xDC00 ) && ( second <= 0xDFFF ) ) { + // The second element is valid: convert the two elements to a UTF-32 character + output = static_cast( ( ( first - 0xD800 ) << 10 ) + ( second - 0xDC00 ) + + 0x0010000 ); + } else { + // Invalid character + output = replacement; + } + } else { + // Invalid character + begin = end; + output = replacement; + } + } else { + // We can make a direct copy + output = first; + } + + return begin; +} + +template Out Utf<16>::Encode( Uint32 input, Out output, Uint16 replacement ) { + if ( input < 0xFFFF ) { + // The character can be copied directly, we just need to check if it's in the valid range + if ( ( input >= 0xD800 ) && ( input <= 0xDFFF ) ) { + // Invalid character (this range is reserved) + if ( replacement ) + *output++ = replacement; + } else { + // Valid character directly convertible to a single UTF-16 character + *output++ = static_cast( input ); + } + } else if ( input > 0x0010FFFF ) { + // Invalid character (greater than the maximum unicode value) + if ( replacement ) + *output++ = replacement; + } else { + // The input character will be converted to two UTF-16 elements + input -= 0x0010000; + *output++ = static_cast( ( input >> 10 ) + 0xD800 ); + *output++ = static_cast( ( input & 0x3FFUL ) + 0xDC00 ); + } + + return output; +} + +template In Utf<16>::Next( In begin, In end ) { + Uint32 codepoint; + return Decode( begin, end, codepoint ); +} + +template std::size_t Utf<16>::Count( In begin, In end ) { + std::size_t length = 0; + while ( begin < end ) { + begin = Next( begin, end ); + ++length; + } + + return length; +} + +template +Out Utf<16>::FromAnsi( In begin, In end, Out output, const std::locale& locale ) { + while ( begin < end ) { + Uint32 codepoint = Utf<32>::DecodeAnsi( *begin++, locale ); + output = Encode( codepoint, output ); + } + + return output; +} + +template Out Utf<16>::FromWide( In begin, In end, Out output ) { + while ( begin < end ) { + Uint32 codepoint = Utf<32>::DecodeWide( *begin++ ); + output = Encode( codepoint, output ); + } + + return output; +} + +template Out Utf<16>::FromLatin1( In begin, In end, Out output ) { + // Latin-1 is directly compatible with Unicode encodings, + // and can thus be treated as (a sub-range of) UTF-32 + while ( begin < end ) + *output++ = *begin++; + + return output; +} + +template +Out Utf<16>::ToAnsi( In begin, In end, Out output, char replacement, const std::locale& locale ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + output = Utf<32>::EncodeAnsi( codepoint, output, replacement, locale ); + } + + return output; +} + +#ifndef EFSW_NO_WIDECHAR +template +Out Utf<16>::ToWide( In begin, In end, Out output, wchar_t replacement ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + output = Utf<32>::EncodeWide( codepoint, output, replacement ); + } + + return output; +} +#endif + +template +Out Utf<16>::ToLatin1( In begin, In end, Out output, char replacement ) { + // Latin-1 is directly compatible with Unicode encodings, + // and can thus be treated as (a sub-range of) UTF-32 + while ( begin < end ) { + *output++ = *begin < 256 ? static_cast( *begin ) : replacement; + begin++; + } + + return output; +} + +template Out Utf<16>::toUtf8( In begin, In end, Out output ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + output = Utf<8>::Encode( codepoint, output ); + } + + return output; +} + +template Out Utf<16>::ToUtf16( In begin, In end, Out output ) { + while ( begin < end ) + *output++ = *begin++; + + return output; +} + +template Out Utf<16>::ToUtf32( In begin, In end, Out output ) { + while ( begin < end ) { + Uint32 codepoint; + begin = Decode( begin, end, codepoint ); + *output++ = codepoint; + } + + return output; +} + +template In Utf<32>::Decode( In begin, In end, Uint32& output, Uint32 ) { + output = *begin++; + return begin; +} + +template Out Utf<32>::Encode( Uint32 input, Out output, Uint32 replacement ) { + *output++ = input; + return output; +} + +template In Utf<32>::Next( In begin, In end ) { + return ++begin; +} + +template std::size_t Utf<32>::Count( In begin, In end ) { + return begin - end; +} + +template +Out Utf<32>::FromAnsi( In begin, In end, Out output, const std::locale& locale ) { + while ( begin < end ) + *output++ = DecodeAnsi( *begin++, locale ); + + return output; +} + +template Out Utf<32>::FromWide( In begin, In end, Out output ) { + while ( begin < end ) + *output++ = DecodeWide( *begin++ ); + + return output; +} + +template Out Utf<32>::FromLatin1( In begin, In end, Out output ) { + // Latin-1 is directly compatible with Unicode encodings, + // and can thus be treated as (a sub-range of) UTF-32 + while ( begin < end ) + *output++ = *begin++; + + return output; +} + +template +Out Utf<32>::ToAnsi( In begin, In end, Out output, char replacement, const std::locale& locale ) { + while ( begin < end ) + output = EncodeAnsi( *begin++, output, replacement, locale ); + + return output; +} + +#ifndef EFSW_NO_WIDECHAR +template +Out Utf<32>::ToWide( In begin, In end, Out output, wchar_t replacement ) { + while ( begin < end ) + output = EncodeWide( *begin++, output, replacement ); + + return output; +} +#endif + +template +Out Utf<32>::ToLatin1( In begin, In end, Out output, char replacement ) { + // Latin-1 is directly compatible with Unicode encodings, + // and can thus be treated as (a sub-range of) UTF-32 + while ( begin < end ) { + *output++ = *begin < 256 ? static_cast( *begin ) : replacement; + begin++; + } + + return output; +} + +template Out Utf<32>::toUtf8( In begin, In end, Out output ) { + while ( begin < end ) + output = Utf<8>::Encode( *begin++, output ); + + return output; +} + +template Out Utf<32>::ToUtf16( In begin, In end, Out output ) { + while ( begin < end ) + output = Utf<16>::Encode( *begin++, output ); + + return output; +} + +template Out Utf<32>::ToUtf32( In begin, In end, Out output ) { + while ( begin < end ) + *output++ = *begin++; + + return output; +} + +template Uint32 Utf<32>::DecodeAnsi( In input, const std::locale& locale ) { + // On Windows, gcc's standard library (glibc++) has almost + // no support for Unicode stuff. As a consequence, in this + // context we can only use the default locale and ignore + // the one passed as parameter. + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN && /* if Windows ... */ \ + ( defined( __GLIBCPP__ ) || \ + defined( __GLIBCXX__ ) ) && /* ... and standard library is glibc++ ... */ \ + !( defined( __SGI_STL_PORT ) || \ + defined( _STLPORT_VERSION ) ) /* ... and STLPort is not used on top of it */ + + wchar_t character = 0; + mbtowc( &character, &input, 1 ); + return static_cast( character ); + +#else +// Get the facet of the locale which deals with character conversion +#ifndef EFSW_NO_WIDECHAR + const std::ctype& facet = std::use_facet>( locale ); +#else + const std::ctype& facet = std::use_facet>( locale ); +#endif + + // Use the facet to convert each character of the input string + return static_cast( facet.widen( input ) ); + +#endif +} + +template Uint32 Utf<32>::DecodeWide( In input ) { + // The encoding of wide characters is not well defined and is left to the system; + // however we can safely assume that it is UCS-2 on Windows and + // UCS-4 on Unix systems. + // In both cases, a simple copy is enough (UCS-2 is a subset of UCS-4, + // and UCS-4 *is* UTF-32). + + return input; +} + +template +Out Utf<32>::EncodeAnsi( Uint32 codepoint, Out output, char replacement, + const std::locale& locale ) { + // On Windows, gcc's standard library (glibc++) has almost + // no support for Unicode stuff. As a consequence, in this + // context we can only use the default locale and ignore + // the one passed as parameter. + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN && /* if Windows ... */ \ + ( defined( __GLIBCPP__ ) || \ + defined( __GLIBCXX__ ) ) && /* ... and standard library is glibc++ ... */ \ + !( defined( __SGI_STL_PORT ) || \ + defined( _STLPORT_VERSION ) ) /* ... and STLPort is not used on top of it */ + + char character = 0; + if ( wctomb( &character, static_cast( codepoint ) ) >= 0 ) + *output++ = character; + else if ( replacement ) + *output++ = replacement; + + return output; + +#else +// Get the facet of the locale which deals with character conversion +#ifndef EFSW_NO_WIDECHAR + const std::ctype& facet = std::use_facet>( locale ); +#else + const std::ctype& facet = std::use_facet>( locale ); +#endif + + // Use the facet to convert each character of the input string + *output++ = facet.narrow( static_cast( codepoint ), replacement ); + + return output; + +#endif +} + +#ifndef EFSW_NO_WIDECHAR +template +Out Utf<32>::EncodeWide( Uint32 codepoint, Out output, wchar_t replacement ) { + // The encoding of wide characters is not well defined and is left to the system; + // however we can safely assume that it is UCS-2 on Windows and + // UCS-4 on Unix systems. + // For UCS-2 we need to check if the source characters fits in (UCS-2 is a subset of UCS-4). + // For UCS-4 we can do a direct copy (UCS-4 *is* UTF-32). + + switch ( sizeof( wchar_t ) ) { + case 4: { + *output++ = static_cast( codepoint ); + break; + } + + default: { + if ( ( codepoint <= 0xFFFF ) && ( ( codepoint < 0xD800 ) || ( codepoint > 0xDFFF ) ) ) { + *output++ = static_cast( codepoint ); + } else if ( replacement ) { + *output++ = replacement; + } + break; + } + } + + return output; +} +#endif diff --git a/src/efsw/Watcher.cpp b/src/efsw/Watcher.cpp new file mode 100644 index 0000000..913ae3c --- /dev/null +++ b/src/efsw/Watcher.cpp @@ -0,0 +1,10 @@ +#include + +namespace efsw { + +Watcher::Watcher() : ID( 0 ), Directory( "" ), Listener( NULL ), Recursive( false ) {} + +Watcher::Watcher( WatchID id, std::string directory, FileWatchListener* listener, bool recursive ) : + ID( id ), Directory( directory ), Listener( listener ), Recursive( recursive ) {} + +} // namespace efsw diff --git a/src/efsw/Watcher.hpp b/src/efsw/Watcher.hpp new file mode 100644 index 0000000..84f0980 --- /dev/null +++ b/src/efsw/Watcher.hpp @@ -0,0 +1,29 @@ +#ifndef EFSW_WATCHERIMPL_HPP +#define EFSW_WATCHERIMPL_HPP + +#include +#include + +namespace efsw { + +/** @brief Base Watcher class */ +class Watcher { + public: + Watcher(); + + Watcher( WatchID id, std::string directory, FileWatchListener* listener, bool recursive ); + + virtual ~Watcher() {} + + virtual void watch() {} + + WatchID ID; + std::string Directory; + FileWatchListener* Listener; + bool Recursive; + std::string OldFileName; +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/WatcherFSEvents.cpp b/src/efsw/WatcherFSEvents.cpp new file mode 100644 index 0000000..bc982bf --- /dev/null +++ b/src/efsw/WatcherFSEvents.cpp @@ -0,0 +1,223 @@ +#include +#include +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +namespace efsw { + +WatcherFSEvents::WatcherFSEvents() : + Watcher(), FWatcher( NULL ), FSStream( NULL ), WatcherGen( NULL ) {} + +WatcherFSEvents::~WatcherFSEvents() { + if ( NULL != FSStream ) { + FSEventStreamStop( FSStream ); + FSEventStreamInvalidate( FSStream ); + FSEventStreamRelease( FSStream ); + } + + efSAFE_DELETE( WatcherGen ); +} + +void WatcherFSEvents::init() { + CFStringRef CFDirectory = + CFStringCreateWithCString( NULL, Directory.c_str(), kCFStringEncodingUTF8 ); + CFArrayRef CFDirectoryArray = CFArrayCreate( NULL, (const void**)&CFDirectory, 1, NULL ); + + Uint32 streamFlags = kFSEventStreamCreateFlagNone; + + if ( FileWatcherFSEvents::isGranular() ) { + streamFlags = efswFSEventStreamCreateFlagFileEvents | efswFSEventStreamCreateFlagNoDefer | + efswFSEventStreamCreateFlagUseExtendedData | + efswFSEventStreamCreateFlagUseCFTypes; + } else { + WatcherGen = new WatcherGeneric( ID, Directory, Listener, FWatcher.load(), Recursive ); + } + + FSEventStreamContext ctx; + /* Initialize context */ + ctx.version = 0; + ctx.info = this; + ctx.retain = NULL; + ctx.release = NULL; + ctx.copyDescription = NULL; + + dispatch_queue_t queue = dispatch_queue_create( NULL, NULL ); + + FSStream = + FSEventStreamCreate( kCFAllocatorDefault, &FileWatcherFSEvents::FSEventCallback, &ctx, + CFDirectoryArray, kFSEventStreamEventIdSinceNow, 0., streamFlags ); + + FSEventStreamSetDispatchQueue( FSStream, queue ); + + FSEventStreamStart( FSStream ); + + CFRelease( CFDirectoryArray ); + CFRelease( CFDirectory ); +} + +void WatcherFSEvents::sendFileAction( WatchID watchid, const std::string& dir, + const std::string& filename, Action action, + std::string oldFilename ) { + Listener->handleFileAction( watchid, FileSystem::precomposeFileName( dir ), + FileSystem::precomposeFileName( filename ), action, + FileSystem::precomposeFileName( oldFilename ) ); +} + +void WatcherFSEvents::sendMissedFileActions( WatchID watchid, + const std::string& dir) { + Listener->handleMissedFileActions( watchid, + FileSystem::precomposeFileName( dir ) ); +} + +void WatcherFSEvents::handleAddModDel( const Uint32& flags, const std::string& path, + std::string& dirPath, std::string& filePath, Uint64 inode ) { + if ( ( flags & efswFSEventStreamEventFlagItemCreated ) && FileInfo::exists( path ) && + ( !SanitizeEvents || FilesAdded.find( inode ) != FilesAdded.end() ) ) { + sendFileAction( ID, dirPath, filePath, Actions::Add ); + + if ( SanitizeEvents ) + FilesAdded.insert( inode ); + } + + if ( flags & ModifiedFlags ) { + sendFileAction( ID, dirPath, filePath, Actions::Modified ); + } + + if ( ( flags & efswFSEventStreamEventFlagItemRemoved ) && !FileInfo::exists( path ) ) { + // Since i don't know the order, at least i try to keep the data consistent with the real + // state + sendFileAction( ID, dirPath, filePath, Actions::Delete ); + + if ( SanitizeEvents ) + FilesAdded.erase( inode ); + } +} + +void WatcherFSEvents::handleActions( std::vector& events ) { + size_t esize = events.size(); + + for ( size_t i = 0; i < esize; i++ ) { + FSEvent& event = events[i]; + + if ( event.Flags & + ( kFSEventStreamEventFlagUserDropped | kFSEventStreamEventFlagKernelDropped | + kFSEventStreamEventFlagMustScanSubDirs) ) { + efDEBUG( "Rescan/Drop event for watch: %s - flags: 0x%x\n", Directory.c_str(), event.Flags ); + std::string dirPath = Directory; + FileSystem::dirRemoveSlashAtEnd( dirPath ); + sendMissedFileActions(ID, dirPath ); + continue; + } + + if ( event.Flags & + ( kFSEventStreamEventFlagEventIdsWrapped | kFSEventStreamEventFlagHistoryDone | + kFSEventStreamEventFlagMount | kFSEventStreamEventFlagUnmount | + kFSEventStreamEventFlagRootChanged ) ) { + continue; + } + + if ( !Recursive ) { + /** In case that is not recursive the watcher, ignore the events from subfolders */ + if ( event.Path.find_last_of( FileSystem::getOSSlash() ) != Directory.size() - 1 ) { + continue; + } + } + + if ( FileWatcherFSEvents::isGranular() ) { + std::string dirPath( FileSystem::pathRemoveFileName( event.Path ) ); + std::string filePath( FileSystem::fileNameFromPath( event.Path ) ); + + if ( event.Flags & + ( efswFSEventStreamEventFlagItemCreated | efswFSEventStreamEventFlagItemRemoved | + efswFSEventStreamEventFlagItemRenamed ) ) { + if ( dirPath != Directory ) { + DirsChanged.insert( dirPath ); + } + } + + // This is a mess. But it's FSEvents faults, because shrinks events from the same file + // in one single event ( so there's no order for them ) For example a file could have + // been added modified and erased, but i can't know if first was erased and then added + // and modified, or added, then modified and then erased. I don't know what they were + // thinking by doing this... + efDEBUG( "Event in: %s - flags: 0x%x\n", event.Path.c_str(), event.Flags ); + + if ( event.Flags & efswFSEventStreamEventFlagItemRenamed ) { + if ( ( i + 1 < esize ) && + ( events[i + 1].Flags & efswFSEventStreamEventFlagItemRenamed ) && + ( events[i + 1].inode == event.inode ) ) { + FSEvent& nEvent = events[i + 1]; + std::string newDir( FileSystem::pathRemoveFileName( nEvent.Path ) ); + std::string newFilepath( FileSystem::fileNameFromPath( nEvent.Path ) ); + + if ( event.Path != nEvent.Path ) { + if ( dirPath == newDir ) { + if ( !FileInfo::exists( event.Path ) || + 0 == strcasecmp( event.Path.c_str(), nEvent.Path.c_str() ) ) { + sendFileAction( ID, dirPath, newFilepath, Actions::Moved, + filePath ); + } else { + sendFileAction( ID, dirPath, filePath, Actions::Moved, + newFilepath ); + } + } else { + sendFileAction( ID, dirPath, filePath, Actions::Delete ); + sendFileAction( ID, newDir, newFilepath, Actions::Add ); + + if ( nEvent.Flags & ModifiedFlags ) { + sendFileAction( ID, newDir, newFilepath, Actions::Modified ); + } + } + } else { + handleAddModDel( nEvent.Flags, nEvent.Path, dirPath, filePath, event.inode ); + } + + if ( nEvent.Flags & ( efswFSEventStreamEventFlagItemCreated | + efswFSEventStreamEventFlagItemRemoved | + efswFSEventStreamEventFlagItemRenamed ) ) { + if ( newDir != Directory ) { + DirsChanged.insert( newDir ); + } + } + + // Skip the renamed file + i++; + } else if ( FileInfo::exists( event.Path ) ) { + sendFileAction( ID, dirPath, filePath, Actions::Add ); + + if ( event.Flags & ModifiedFlags ) { + sendFileAction( ID, dirPath, filePath, Actions::Modified ); + } + } else { + sendFileAction( ID, dirPath, filePath, Actions::Delete ); + } + } else { + handleAddModDel( event.Flags, event.Path, dirPath, filePath, event.inode ); + } + } else { + efDEBUG( "Directory: %s changed\n", event.Path.c_str() ); + DirsChanged.insert( event.Path ); + } + } +} + +void WatcherFSEvents::process() { + std::unordered_set::iterator it = DirsChanged.begin(); + + for ( ; it != DirsChanged.end(); it++ ) { + if ( !FileWatcherFSEvents::isGranular() ) { + WatcherGen->watchDir( ( *it ) ); + } else { + sendFileAction( ID, FileSystem::pathRemoveFileName( ( *it ) ), + FileSystem::fileNameFromPath( ( *it ) ), Actions::Modified ); + } + } + + DirsChanged.clear(); +} + +} // namespace efsw + +#endif diff --git a/src/efsw/WatcherFSEvents.hpp b/src/efsw/WatcherFSEvents.hpp new file mode 100644 index 0000000..fe17ed4 --- /dev/null +++ b/src/efsw/WatcherFSEvents.hpp @@ -0,0 +1,89 @@ +#ifndef EFSW_WATCHERINOTIFY_HPP +#define EFSW_WATCHERINOTIFY_HPP + +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +#include +#include +#include +#include +#include +#include + +namespace efsw { + +/* OSX < 10.7 has no file events */ +/* So i declare the events constants */ +enum FSEventEvents { + efswFSEventStreamCreateFlagUseCFTypes = 0x00000001, + efswFSEventStreamCreateFlagNoDefer = 0x00000002, + efswFSEventStreamCreateFlagFileEvents = 0x00000010, + efswFSEventStreamCreateFlagUseExtendedData = 0x00000040, + efswFSEventStreamEventFlagItemCreated = 0x00000100, + efswFSEventStreamEventFlagItemRemoved = 0x00000200, + efswFSEventStreamEventFlagItemInodeMetaMod = 0x00000400, + efswFSEventStreamEventFlagItemRenamed = 0x00000800, + efswFSEventStreamEventFlagItemModified = 0x00001000, + efswFSEventStreamEventFlagItemFinderInfoMod = 0x00002000, + efswFSEventStreamEventFlagItemChangeOwner = 0x00004000, + efswFSEventStreamEventFlagItemXattrMod = 0x00008000, + efswFSEventStreamEventFlagItemIsFile = 0x00010000, + efswFSEventStreamEventFlagItemIsDir = 0x00020000, + efswFSEventStreamEventFlagItemIsSymlink = 0x00040000, + efswFSEventsModified = efswFSEventStreamEventFlagItemFinderInfoMod | + efswFSEventStreamEventFlagItemModified | + efswFSEventStreamEventFlagItemInodeMetaMod +}; + +class FileWatcherFSEvents; + +class FSEvent { + public: + FSEvent( std::string path, long flags, Uint64 id, Uint64 inode = 0 ) : + Path( path ), Flags( flags ), Id( id ), inode( inode ) {} + + std::string Path; + long Flags{ 0 }; + Uint64 Id{ 0 }; + Uint64 inode{ 0 }; +}; + +class WatcherFSEvents : public Watcher { + public: + WatcherFSEvents(); + + ~WatcherFSEvents(); + + void init(); + + void handleActions( std::vector& events ); + + void process(); + + Atomic FWatcher; + FSEventStreamRef FSStream; + Uint64 ModifiedFlags{ efswFSEventsModified }; + bool SanitizeEvents{ false }; + + protected: + void handleAddModDel( const Uint32& flags, const std::string& path, std::string& dirPath, + std::string& filePath, Uint64 inode ); + + WatcherGeneric* WatcherGen; + + std::unordered_set DirsChanged; + std::unordered_set FilesAdded; + + void sendFileAction( WatchID watchid, const std::string& dir, const std::string& filename, + Action action, std::string oldFilename = "" ); + + void sendMissedFileActions( WatchID watchid, const std::string& dir); +}; + +} // namespace efsw + +#endif + +#endif diff --git a/src/efsw/WatcherGeneric.cpp b/src/efsw/WatcherGeneric.cpp new file mode 100644 index 0000000..a6bb106 --- /dev/null +++ b/src/efsw/WatcherGeneric.cpp @@ -0,0 +1,33 @@ +#include +#include +#include + +namespace efsw { + +WatcherGeneric::WatcherGeneric( WatchID id, const std::string& directory, FileWatchListener* fwl, + FileWatcherImpl* fw, bool recursive ) : + Watcher( id, directory, fwl, recursive ), WatcherImpl( fw ), DirWatch( NULL ) { + FileSystem::dirAddSlashAtEnd( Directory ); + + DirWatch = new DirWatcherGeneric( NULL, this, directory, recursive, false ); + + DirWatch->addChilds( false ); +} + +WatcherGeneric::~WatcherGeneric() { + efSAFE_DELETE( DirWatch ); +} + +void WatcherGeneric::watch() { + DirWatch->watch(); +} + +void WatcherGeneric::watchDir( std::string dir ) { + DirWatch->watchDir( dir ); +} + +bool WatcherGeneric::pathInWatches( std::string path ) { + return DirWatch->pathInWatches( path ); +} + +} // namespace efsw diff --git a/src/efsw/WatcherGeneric.hpp b/src/efsw/WatcherGeneric.hpp new file mode 100644 index 0000000..d11ec20 --- /dev/null +++ b/src/efsw/WatcherGeneric.hpp @@ -0,0 +1,29 @@ +#ifndef EFSW_WATCHERGENERIC_HPP +#define EFSW_WATCHERGENERIC_HPP + +#include + +namespace efsw { + +class DirWatcherGeneric; + +class WatcherGeneric : public Watcher { + public: + FileWatcherImpl* WatcherImpl; + DirWatcherGeneric* DirWatch; + + WatcherGeneric( WatchID id, const std::string& directory, FileWatchListener* fwl, + FileWatcherImpl* fw, bool recursive ); + + ~WatcherGeneric(); + + void watch() override; + + void watchDir( std::string dir ); + + bool pathInWatches( std::string path ); +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/WatcherInotify.cpp b/src/efsw/WatcherInotify.cpp new file mode 100644 index 0000000..812ddae --- /dev/null +++ b/src/efsw/WatcherInotify.cpp @@ -0,0 +1,21 @@ +#include + +namespace efsw { + +WatcherInotify::WatcherInotify() : Watcher(), Parent( NULL ) {} + +bool WatcherInotify::inParentTree( WatcherInotify* parent ) { + WatcherInotify* tNext = Parent; + + while ( NULL != tNext ) { + if ( tNext == parent ) { + return true; + } + + tNext = tNext->Parent; + } + + return false; +} + +} // namespace efsw diff --git a/src/efsw/WatcherInotify.hpp b/src/efsw/WatcherInotify.hpp new file mode 100644 index 0000000..ec55ed0 --- /dev/null +++ b/src/efsw/WatcherInotify.hpp @@ -0,0 +1,24 @@ +#ifndef EFSW_WATCHERINOTIFY_HPP +#define EFSW_WATCHERINOTIFY_HPP + +#include +#include + +namespace efsw { + +class WatcherInotify : public Watcher { + public: + WatcherInotify(); + + bool inParentTree( WatcherInotify* parent ); + + WatcherInotify* Parent; + WatchID InotifyID; + + FileInfo DirInfo; + bool syntheticEvents{ false }; +}; + +} // namespace efsw + +#endif diff --git a/src/efsw/WatcherKqueue.cpp b/src/efsw/WatcherKqueue.cpp new file mode 100644 index 0000000..424b989 --- /dev/null +++ b/src/efsw/WatcherKqueue.cpp @@ -0,0 +1,566 @@ +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_KQUEUE || EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define KEVENT_RESERVE_VALUE ( 10 ) + +#ifndef O_EVTONLY +#define O_EVTONLY ( O_RDONLY | O_NONBLOCK ) +#endif + +namespace efsw { + +int comparator( const void* ke1, const void* ke2 ) { + const KEvent* kev1 = reinterpret_cast( ke1 ); + const KEvent* kev2 = reinterpret_cast( ke2 ); + + if ( NULL != kev2->udata ) { + FileInfo* fi1 = reinterpret_cast( kev1->udata ); + FileInfo* fi2 = reinterpret_cast( kev2->udata ); + + return strcmp( fi1->Filepath.c_str(), fi2->Filepath.c_str() ); + } + + return 1; +} + +WatcherKqueue::WatcherKqueue( WatchID watchid, const std::string& dirname, + FileWatchListener* listener, bool recursive, + FileWatcherKqueue* watcher, WatcherKqueue* parent ) : + Watcher( watchid, dirname, listener, recursive ), + mLastWatchID( 0 ), + mChangeListCount( 0 ), + mKqueue( kqueue() ), + mWatcher( watcher ), + mParent( parent ), + mInitOK( true ), + mErrno( 0 ) { + if ( -1 == mKqueue ) { + efDEBUG( + "kqueue() returned invalid descriptor for directory %s. File descriptors count: %ld\n", + Directory.c_str(), mWatcher->mFileDescriptorCount ); + + mInitOK = false; + mErrno = errno; + } else { + mWatcher->addFD(); + } +} + +WatcherKqueue::~WatcherKqueue() { + // Remove the childs watchers ( sub-folders watches ) + removeAll(); + + for ( size_t i = 0; i < mChangeListCount; i++ ) { + if ( NULL != mChangeList[i].udata ) { + FileInfo* fi = reinterpret_cast( mChangeList[i].udata ); + + efSAFE_DELETE( fi ); + } + } + + close( mKqueue ); + + mWatcher->removeFD(); +} + +void WatcherKqueue::addAll() { + if ( -1 == mKqueue ) { + return; + } + + // scan directory and call addFile(name, false) on each file + FileSystem::dirAddSlashAtEnd( Directory ); + + efDEBUG( "addAll(): Added folder: %s\n", Directory.c_str() ); + + // add base dir + int fd = open( Directory.c_str(), O_EVTONLY ); + + if ( -1 == fd ) { + efDEBUG( "addAll(): Couldn't open folder: %s\n", Directory.c_str() ); + + if ( EACCES != errno ) { + mInitOK = false; + } + + mErrno = errno; + + return; + } + + mDirSnap.setDirectoryInfo( Directory ); + mDirSnap.scan(); + + mChangeList.resize( KEVENT_RESERVE_VALUE ); + + // Creates the kevent for the folder + EV_SET( &mChangeList[0], fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_ONESHOT, + NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_ATTRIB | NOTE_RENAME, 0, 0 ); + + mWatcher->addFD(); + + // Get the files and directories from the directory + FileInfoMap files = FileSystem::filesInfoFromPath( Directory ); + + for ( FileInfoMap::iterator it = files.begin(); it != files.end(); it++ ) { + FileInfo& fi = it->second; + + if ( fi.isRegularFile() ) { + // Add the regular files kevent + addFile( fi.Filepath, false ); + } else if ( Recursive && fi.isDirectory() && fi.isReadable() ) { + // Create another watcher for the subfolders ( if recursive ) + WatchID id = addWatch( fi.Filepath, Listener, Recursive, this ); + + // If the watcher is not adding the watcher means that the directory was created + if ( id > 0 && !mWatcher->isAddingWatcher() ) { + handleFolderAction( fi.Filepath, Actions::Add ); + } + } + } +} + +void WatcherKqueue::removeAll() { + efDEBUG( "removeAll(): Removing all child watchers\n" ); + + std::vector erase; + + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); it++ ) { + efDEBUG( "removeAll(): Removed child watcher %s\n", it->second->Directory.c_str() ); + + erase.push_back( it->second->ID ); + } + + for ( std::vector::iterator eit = erase.begin(); eit != erase.end(); eit++ ) { + removeWatch( *eit ); + } +} + +void WatcherKqueue::addFile( const std::string& name, bool emitEvents ) { + efDEBUG( "addFile(): Added: %s\n", name.c_str() ); + + // Open the file to get the file descriptor + int fd = open( name.c_str(), O_EVTONLY ); + + if ( fd == -1 ) { + efDEBUG( "addFile(): Could open file descriptor for %s. File descriptor count: %ld\n", + name.c_str(), mWatcher->mFileDescriptorCount ); + + Errors::Log::createLastError( Errors::FileNotReadable, name ); + + if ( EACCES != errno ) { + mInitOK = false; + } + + mErrno = errno; + + return; + } + + mWatcher->addFD(); + + // increase the file kevent file count + mChangeListCount++; + + if ( mChangeListCount + KEVENT_RESERVE_VALUE > mChangeList.size() && + mChangeListCount % KEVENT_RESERVE_VALUE == 0 ) { + size_t reserve_size = mChangeList.size() + KEVENT_RESERVE_VALUE; + mChangeList.resize( reserve_size ); + efDEBUG( "addFile(): Reserverd more KEvents space for %s, space reserved %ld, list actual " + "size %ld.\n", + Directory.c_str(), reserve_size, mChangeListCount ); + } + + // create entry + FileInfo* entry = new FileInfo( name ); + + // set the event data at the end of the list + EV_SET( &mChangeList[mChangeListCount], fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_ONESHOT, + NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_ATTRIB | NOTE_RENAME, 0, (void*)entry ); + + // qsort sort the list by name + qsort( &mChangeList[1], mChangeListCount, sizeof( KEvent ), comparator ); + + // handle action + if ( emitEvents ) { + handleAction( name, Actions::Add ); + } +} + +void WatcherKqueue::removeFile( const std::string& name, bool emitEvents ) { + efDEBUG( "removeFile(): Trying to remove file: %s\n", name.c_str() ); + + // bsearch + KEvent target; + + // Create a temporary file info to search the kevent ( searching the directory ) + FileInfo tempEntry( name ); + + target.udata = &tempEntry; + + // Search the kevent + KEvent* ke = (KEvent*)bsearch( &target, &mChangeList[0], mChangeListCount + 1, sizeof( KEvent ), + comparator ); + + // Trying to remove a non-existing file? + if ( !ke ) { + Errors::Log::createLastError( Errors::FileNotFound, name ); + efDEBUG( "File not removed\n" ); + return; + } + + efDEBUG( "File removed\n" ); + + // handle action + if ( emitEvents ) { + handleAction( name, Actions::Delete ); + } + + // Delete the user data ( FileInfo ) from the kevent closed + FileInfo* del = reinterpret_cast( ke->udata ); + + efSAFE_DELETE( del ); + + // close the file descriptor from the kevent + close( ke->ident ); + + mWatcher->removeFD(); + + memset( ke, 0, sizeof( KEvent ) ); + + // move end to current + memcpy( ke, &mChangeList[mChangeListCount], sizeof( KEvent ) ); + memset( &mChangeList[mChangeListCount], 0, sizeof( KEvent ) ); + --mChangeListCount; +} + +void WatcherKqueue::rescan() { + efDEBUG( "rescan(): Rescanning: %s\n", Directory.c_str() ); + + DirectorySnapshotDiff Diff = mDirSnap.scan(); + + if ( Diff.DirChanged ) { + sendDirChanged(); + } + + if ( Diff.changed() ) { + FileInfoList::iterator it; + MovedList::iterator mit; + + /// Files + DiffIterator( FilesCreated ) { + addFile( ( *it ).Filepath ); + } + + DiffIterator( FilesModified ) { + handleAction( ( *it ).Filepath, Actions::Modified ); + } + + DiffIterator( FilesDeleted ) { + removeFile( ( *it ).Filepath ); + } + + DiffMovedIterator( FilesMoved ) { + handleAction( ( *mit ).second.Filepath, Actions::Moved, ( *mit ).first ); + removeFile( Directory + ( *mit ).first, false ); + addFile( ( *mit ).second.Filepath, false ); + } + + /// Directories + DiffIterator( DirsCreated ) { + handleFolderAction( ( *it ).Filepath, Actions::Add ); + addWatch( ( *it ).Filepath, Listener, Recursive, this ); + } + + DiffIterator( DirsModified ) { + handleFolderAction( ( *it ).Filepath, Actions::Modified ); + } + + DiffIterator( DirsDeleted ) { + handleFolderAction( ( *it ).Filepath, Actions::Delete ); + + Watcher* watch = findWatcher( ( *it ).Filepath ); + + if ( NULL != watch ) { + removeWatch( watch->ID ); + } + } + + DiffMovedIterator( DirsMoved ) { + moveDirectory( Directory + ( *mit ).first, ( *mit ).second.Filepath ); + } + } +} + +WatchID WatcherKqueue::watchingDirectory( std::string dir ) { + Watcher* watch = findWatcher( dir ); + + if ( NULL != watch ) { + return watch->ID; + } + + return Errors::FileNotFound; +} + +void WatcherKqueue::handleAction( const std::string& filename, efsw::Action action, + const std::string& oldFilename ) { + Listener->handleFileAction( ID, Directory, FileSystem::fileNameFromPath( filename ), action, + FileSystem::fileNameFromPath( oldFilename ) ); +} + +void WatcherKqueue::handleFolderAction( std::string filename, efsw::Action action, + const std::string& oldFilename ) { + FileSystem::dirRemoveSlashAtEnd( filename ); + + handleAction( filename, action, oldFilename ); +} + +void WatcherKqueue::sendDirChanged() { + if ( NULL != mParent ) { + Listener->handleFileAction( mParent->ID, mParent->Directory, + FileSystem::fileNameFromPath( Directory ), Actions::Modified ); + } +} + +void WatcherKqueue::watch() { + if ( -1 == mKqueue ) { + return; + } + + int nev = 0; + KEvent event; + + // First iterate the childs, to get the events from the deepest folder, to the watcher childs + for ( WatchMap::iterator it = mWatches.begin(); it != mWatches.end(); ++it ) { + it->second->watch(); + } + + bool needScan = false; + + // Then we get the the events of the current folder + while ( !mChangeList.empty() && + ( nev = kevent( mKqueue, mChangeList.data(), mChangeListCount + 1, &event, 1, + &mWatcher->mTimeOut ) ) != 0 ) { + // An error ocurred? + if ( nev == -1 ) { + efDEBUG( "watch(): Error on directory %s\n", Directory.c_str() ); + perror( "kevent" ); + break; + } else { + FileInfo* entry = NULL; + + // If udate == NULL means that it is the fisrt element of the change list, the folder. + // otherwise it is an event of some file inside the folder + if ( ( entry = reinterpret_cast( event.udata ) ) != NULL ) { + efDEBUG( "watch(): File: %s ", entry->Filepath.c_str() ); + + // If the event flag is delete... the file was deleted + if ( event.fflags & NOTE_DELETE ) { + efDEBUG( "deleted\n" ); + + mDirSnap.removeFile( entry->Filepath ); + + removeFile( entry->Filepath ); + } else if ( event.fflags & NOTE_EXTEND || event.fflags & NOTE_WRITE || + event.fflags & NOTE_ATTRIB ) { + // The file was modified + efDEBUG( "modified\n" ); + + FileInfo fi( entry->Filepath ); + + if ( fi != *entry ) { + *entry = fi; + + mDirSnap.updateFile( entry->Filepath ); + + handleAction( entry->Filepath, efsw::Actions::Modified ); + } + } else if ( event.fflags & NOTE_RENAME ) { + efDEBUG( "moved\n" ); + + needScan = true; + } + } else { + needScan = true; + } + } + } + + if ( needScan ) { + rescan(); + } +} + +Watcher* WatcherKqueue::findWatcher( const std::string path ) { + WatchMap::iterator it = mWatches.begin(); + + for ( ; it != mWatches.end(); it++ ) { + if ( it->second->Directory == path ) { + return it->second; + } + } + + return NULL; +} + +void WatcherKqueue::moveDirectory( std::string oldPath, std::string newPath, bool emitEvents ) { + // Update the directory path if it's a watcher + std::string opath2( oldPath ); + FileSystem::dirAddSlashAtEnd( opath2 ); + + Watcher* watch = findWatcher( opath2 ); + + if ( NULL != watch ) { + watch->Directory = opath2; + } + + if ( emitEvents ) { + handleFolderAction( newPath, efsw::Actions::Moved, oldPath ); + } +} + +WatchID WatcherKqueue::addWatch( const std::string& directory, FileWatchListener* watcher, + bool recursive, WatcherKqueue* parent ) { + static bool s_ug = false; + + std::string dir( directory ); + + FileSystem::dirAddSlashAtEnd( dir ); + + // This should never happen here + if ( !FileSystem::isDirectory( dir ) ) { + return Errors::Log::createLastError( Errors::FileNotFound, dir ); + } else if ( pathInWatches( dir ) || pathInParent( dir ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, directory ); + } else if ( NULL != parent && FileSystem::isRemoteFS( dir ) ) { + return Errors::Log::createLastError( Errors::FileRemote, dir ); + } + + std::string curPath; + std::string link( FileSystem::getLinkRealPath( dir, curPath ) ); + + if ( "" != link ) { + /// Avoid adding symlinks directories if it's now enabled + if ( NULL != parent && !mWatcher->mFileWatcher->followSymlinks() ) { + return Errors::Log::createLastError( Errors::FileOutOfScope, dir ); + } + + if ( pathInWatches( link ) || pathInParent( link ) ) { + return Errors::Log::createLastError( Errors::FileRepeated, link ); + } else if ( !mWatcher->linkAllowed( curPath, link ) ) { + return Errors::Log::createLastError( Errors::FileOutOfScope, link ); + } else { + dir = link; + } + } + + if ( mWatcher->availablesFD() ) { + WatcherKqueue* watch = + new WatcherKqueue( ++mLastWatchID, dir, watcher, recursive, mWatcher, parent ); + + mWatches.insert( std::make_pair( mLastWatchID, watch ) ); + + watch->addAll(); + + // if failed to open the directory... erase the watcher + if ( !watch->initOK() ) { + int le = watch->lastErrno(); + + mWatches.erase( watch->ID ); + + efSAFE_DELETE( watch ); + + mLastWatchID--; + + // Probably the folder has too many files, create a generic watcher + if ( EACCES != le ) { + WatcherGeneric* watch = + new WatcherGeneric( ++mLastWatchID, dir, watcher, mWatcher, recursive ); + + mWatches.insert( std::make_pair( mLastWatchID, watch ) ); + } else { + return Errors::Log::createLastError( Errors::Unspecified, link ); + } + } + } else { + if ( !s_ug ) { + efDEBUG( "Started using WatcherGeneric, reached file descriptors limit: %ld.\n", + mWatcher->mFileDescriptorCount ); + s_ug = true; + } + + WatcherGeneric* watch = + new WatcherGeneric( ++mLastWatchID, dir, watcher, mWatcher, recursive ); + + mWatches.insert( std::make_pair( mLastWatchID, watch ) ); + } + + return mLastWatchID; +} + +bool WatcherKqueue::initOK() { + return mInitOK; +} + +void WatcherKqueue::removeWatch( WatchID watchid ) { + WatchMap::iterator iter = mWatches.find( watchid ); + + if ( iter == mWatches.end() ) + return; + + Watcher* watch = iter->second; + + mWatches.erase( iter ); + + efSAFE_DELETE( watch ); +} + +bool WatcherKqueue::pathInWatches( const std::string& path ) { + return NULL != findWatcher( path ); +} + +bool WatcherKqueue::pathInParent( const std::string& path ) { + WatcherKqueue* pNext = mParent; + + while ( NULL != pNext ) { + if ( pNext->pathInWatches( path ) ) { + return true; + } + + pNext = pNext->mParent; + } + + if ( mWatcher->pathInWatches( path ) ) { + return true; + } + + if ( path == Directory ) { + return true; + } + + return false; +} + +int WatcherKqueue::lastErrno() { + return mErrno; +} + +} // namespace efsw + +#endif diff --git a/src/efsw/WatcherKqueue.hpp b/src/efsw/WatcherKqueue.hpp new file mode 100644 index 0000000..75c0f62 --- /dev/null +++ b/src/efsw/WatcherKqueue.hpp @@ -0,0 +1,97 @@ +#ifndef EFSW_WATCHEROSX_HPP +#define EFSW_WATCHEROSX_HPP + +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_KQUEUE || EFSW_PLATFORM == EFSW_PLATFORM_FSEVENTS + +#include +#include +#include +#include +#include + +namespace efsw { + +class FileWatcherKqueue; +class WatcherKqueue; + +typedef struct kevent KEvent; + +/// type for a map from WatchID to WatcherKqueue pointer +typedef std::map WatchMap; + +class WatcherKqueue : public Watcher { + public: + WatcherKqueue( WatchID watchid, const std::string& dirname, FileWatchListener* listener, + bool recursive, FileWatcherKqueue* watcher, WatcherKqueue* parent = NULL ); + + virtual ~WatcherKqueue(); + + void addFile( const std::string& name, bool emitEvents = true ); + + void removeFile( const std::string& name, bool emitEvents = true ); + + // called when the directory is actually changed + // means a file has been added or removed + // rescans the watched directory adding/removing files and sending notices + void rescan(); + + void handleAction( const std::string& filename, efsw::Action action, + const std::string& oldFilename = "" ); + + void handleFolderAction( std::string filename, efsw::Action action, + const std::string& oldFilename = "" ); + + void addAll(); + + void removeAll(); + + WatchID watchingDirectory( std::string dir ); + + void watch() override; + + WatchID addWatch( const std::string& directory, FileWatchListener* watcher, bool recursive, + WatcherKqueue* parent ); + + void removeWatch( WatchID watchid ); + + bool initOK(); + + int lastErrno(); + + protected: + WatchMap mWatches; + int mLastWatchID; + + // index 0 is always the directory + std::vector mChangeList; + size_t mChangeListCount; + DirectorySnapshot mDirSnap; + + /// The descriptor for the kqueue + int mKqueue; + + FileWatcherKqueue* mWatcher; + + WatcherKqueue* mParent; + + bool mInitOK; + int mErrno; + + bool pathInWatches( const std::string& path ); + + bool pathInParent( const std::string& path ); + + Watcher* findWatcher( const std::string path ); + + void moveDirectory( std::string oldPath, std::string newPath, bool emitEvents = true ); + + void sendDirChanged(); +}; + +} // namespace efsw + +#endif + +#endif diff --git a/src/efsw/WatcherWin32.cpp b/src/efsw/WatcherWin32.cpp new file mode 100644 index 0000000..d8d47aa --- /dev/null +++ b/src/efsw/WatcherWin32.cpp @@ -0,0 +1,268 @@ +#include +#include +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +#include + +namespace efsw { + +struct EFSW_FILE_NOTIFY_EXTENDED_INFORMATION_EX { + DWORD NextEntryOffset; + DWORD Action; + LARGE_INTEGER CreationTime; + LARGE_INTEGER LastModificationTime; + LARGE_INTEGER LastChangeTime; + LARGE_INTEGER LastAccessTime; + LARGE_INTEGER AllocatedLength; + LARGE_INTEGER FileSize; + DWORD FileAttributes; + DWORD ReparsePointTag; + LARGE_INTEGER FileId; + LARGE_INTEGER ParentFileId; + DWORD FileNameLength; + WCHAR FileName[1]; +}; + +typedef EFSW_FILE_NOTIFY_EXTENDED_INFORMATION_EX* EFSW_PFILE_NOTIFY_EXTENDED_INFORMATION_EX; + +typedef BOOL( WINAPI* EFSW_LPREADDIRECTORYCHANGESEXW )( HANDLE hDirectory, LPVOID lpBuffer, + DWORD nBufferLength, BOOL bWatchSubtree, + DWORD dwNotifyFilter, LPDWORD lpBytesReturned, + LPOVERLAPPED lpOverlapped, LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine, + DWORD ReadDirectoryNotifyInformationClass ); + +static EFSW_LPREADDIRECTORYCHANGESEXW pReadDirectoryChangesExW = NULL; + +#define EFSW_ReadDirectoryNotifyExtendedInformation 2 + +static void initReadDirectoryChangesEx() { + static bool hasInit = false; + if ( !hasInit ) { + hasInit = true; + + HMODULE hModule = GetModuleHandleW( L"Kernel32.dll" ); + if ( !hModule ) + return; + + pReadDirectoryChangesExW = + (EFSW_LPREADDIRECTORYCHANGESEXW)GetProcAddress( hModule, "ReadDirectoryChangesExW" ); + } +} + +void WatchCallbackOld( WatcherWin32* pWatch ) { + PFILE_NOTIFY_INFORMATION pNotify; + size_t offset = 0; + do { + bool skip = false; + + pNotify = (PFILE_NOTIFY_INFORMATION)&pWatch->Buffer[offset]; + offset += pNotify->NextEntryOffset; + int count = + WideCharToMultiByte( CP_UTF8, 0, pNotify->FileName, + pNotify->FileNameLength / sizeof( WCHAR ), NULL, 0, NULL, NULL ); + if ( count == 0 ) + continue; + + std::string nfile( count, '\0' ); + + count = WideCharToMultiByte( CP_UTF8, 0, pNotify->FileName, + pNotify->FileNameLength / sizeof( WCHAR ), &nfile[0], count, + NULL, NULL ); + + if ( FILE_ACTION_MODIFIED == pNotify->Action ) { + FileInfo fifile( std::string( pWatch->DirName ) + nfile ); + + if ( pWatch->LastModifiedEvent.file.ModificationTime == fifile.ModificationTime && + pWatch->LastModifiedEvent.file.Size == fifile.Size && + pWatch->LastModifiedEvent.fileName == nfile ) { + skip = true; + } + + pWatch->LastModifiedEvent.fileName = nfile; + pWatch->LastModifiedEvent.file = fifile; + } + + if ( !skip ) { + pWatch->Watch->handleAction( pWatch, nfile, pNotify->Action ); + } + } while ( pNotify->NextEntryOffset != 0 ); +} + +void WatchCallbackEx( WatcherWin32* pWatch ) { + EFSW_PFILE_NOTIFY_EXTENDED_INFORMATION_EX pNotify; + size_t offset = 0; + do { + bool skip = false; + + pNotify = (EFSW_PFILE_NOTIFY_EXTENDED_INFORMATION_EX)&pWatch->Buffer[offset]; + offset += pNotify->NextEntryOffset; + int count = + WideCharToMultiByte( CP_UTF8, 0, pNotify->FileName, + pNotify->FileNameLength / sizeof( WCHAR ), NULL, 0, NULL, NULL ); + if ( count == 0 ) + continue; + + std::string nfile( count, '\0' ); + + count = WideCharToMultiByte( CP_UTF8, 0, pNotify->FileName, + pNotify->FileNameLength / sizeof( WCHAR ), &nfile[0], count, + NULL, NULL ); + + if ( FILE_ACTION_MODIFIED == pNotify->Action ) { + FileInfo fifile( std::string( pWatch->DirName ) + nfile ); + + if ( pWatch->LastModifiedEvent.file.ModificationTime == fifile.ModificationTime && + pWatch->LastModifiedEvent.file.Size == fifile.Size && + pWatch->LastModifiedEvent.fileName == nfile ) { + skip = true; + } + + pWatch->LastModifiedEvent.fileName = nfile; + pWatch->LastModifiedEvent.file = fifile; + } else if ( FILE_ACTION_RENAMED_OLD_NAME == pNotify->Action ) { + pWatch->OldFiles.emplace_back( nfile, pNotify->FileId ); + skip = true; + } else if ( FILE_ACTION_RENAMED_NEW_NAME == pNotify->Action ) { + std::string oldFile; + LARGE_INTEGER oldFileId{}; + + for ( auto it = pWatch->OldFiles.begin(); it != pWatch->OldFiles.end(); ++it ) { + if ( it->second.QuadPart == pNotify->FileId.QuadPart ) { + oldFile = it->first; + oldFileId = it->second; + it = pWatch->OldFiles.erase( it ); + break; + } + } + + if ( oldFile.empty() ) { + pWatch->Watch->handleAction( pWatch, nfile, FILE_ACTION_ADDED ); + skip = true; + } else { + pWatch->Watch->handleAction( pWatch, oldFile, FILE_ACTION_RENAMED_OLD_NAME ); + } + } + + if ( !skip ) { + pWatch->Watch->handleAction( pWatch, nfile, pNotify->Action ); + } + } while ( pNotify->NextEntryOffset != 0 ); +} + +/// Unpacks events and passes them to a user defined callback. +void CALLBACK WatchCallback( DWORD dwNumberOfBytesTransfered, LPOVERLAPPED lpOverlapped ) { + if ( NULL == lpOverlapped ) { + return; + } + + WatcherStructWin32* tWatch = (WatcherStructWin32*)lpOverlapped; + WatcherWin32* pWatch = tWatch->Watch; + + if ( dwNumberOfBytesTransfered == 0 ) { + if ( nullptr != pWatch && !pWatch->StopNow ) { + /// Missed file actions due to buffer overflowed + std::string dir = pWatch->DirName; + FileSystem::dirRemoveSlashAtEnd( dir ); + pWatch->Listener->handleMissedFileActions( pWatch->ID, dir ); + RefreshWatch( tWatch ); + } else { + return; + } + } + + // Fork watch depending on the Windows API supported + if ( pWatch->Extended ) { + WatchCallbackEx( pWatch ); + } else { + WatchCallbackOld( pWatch ); + } + + if ( !pWatch->StopNow ) { + RefreshWatch( tWatch ); + } +} + +/// Refreshes the directory monitoring. +RefreshResult RefreshWatch( WatcherStructWin32* pWatch ) { + initReadDirectoryChangesEx(); + + bool bRet = false; + RefreshResult ret = RefreshResult::Failed; + pWatch->Watch->Extended = false; + + if ( pReadDirectoryChangesExW ) { + bRet = pReadDirectoryChangesExW( pWatch->Watch->DirHandle, pWatch->Watch->Buffer.data(), + (DWORD)pWatch->Watch->Buffer.size(), pWatch->Watch->Recursive, + pWatch->Watch->NotifyFilter, NULL, &pWatch->Overlapped, + NULL, EFSW_ReadDirectoryNotifyExtendedInformation ) != 0; + if ( bRet ) { + ret = RefreshResult::SucessEx; + pWatch->Watch->Extended = true; + } + } + + if ( !bRet ) { + bRet = ReadDirectoryChangesW( pWatch->Watch->DirHandle, pWatch->Watch->Buffer.data(), + (DWORD)pWatch->Watch->Buffer.size(), pWatch->Watch->Recursive, + pWatch->Watch->NotifyFilter, NULL, &pWatch->Overlapped, + NULL ) != 0; + + if ( bRet ) + ret = RefreshResult::Success; + } + + if ( !bRet ) { + std::string error = std::to_string( GetLastError() ); + Errors::Log::createLastError( Errors::WatcherFailed, error ); + } + + return ret; +} + +/// Stops monitoring a directory. +void DestroyWatch( WatcherStructWin32* pWatch ) { + if ( pWatch ) { + WatcherWin32* tWatch = pWatch->Watch; + tWatch->StopNow = true; + CancelIoEx( pWatch->Watch->DirHandle, &pWatch->Overlapped ); + CloseHandle( pWatch->Watch->DirHandle ); + efSAFE_DELETE_ARRAY( pWatch->Watch->DirName ); + efSAFE_DELETE( pWatch->Watch ); + efSAFE_DELETE( pWatch ); + } +} + +/// Starts monitoring a directory. +WatcherStructWin32* CreateWatch( LPCWSTR szDirectory, bool recursive, + DWORD bufferSize, DWORD notifyFilter, HANDLE iocp ) { + WatcherStructWin32* tWatch = new WatcherStructWin32(); + WatcherWin32* pWatch = new WatcherWin32(bufferSize); + if (tWatch) + tWatch->Watch = pWatch; + + pWatch->DirHandle = CreateFileW( + szDirectory, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, + OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, NULL ); + + if ( pWatch->DirHandle != INVALID_HANDLE_VALUE && + CreateIoCompletionPort( pWatch->DirHandle, iocp, 0, 1 ) ) { + pWatch->NotifyFilter = notifyFilter; + pWatch->Recursive = recursive; + + if ( RefreshResult::Failed != RefreshWatch( tWatch ) ) { + return tWatch; + } + } + + CloseHandle( pWatch->DirHandle ); + efSAFE_DELETE( pWatch->Watch ); + efSAFE_DELETE( tWatch ); + return NULL; +} + +} // namespace efsw + +#endif diff --git a/src/efsw/WatcherWin32.hpp b/src/efsw/WatcherWin32.hpp new file mode 100644 index 0000000..ea1e8e4 --- /dev/null +++ b/src/efsw/WatcherWin32.hpp @@ -0,0 +1,79 @@ +#ifndef EFSW_WATCHERWIN32_HPP +#define EFSW_WATCHERWIN32_HPP + +#include +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +#include + +#ifdef EFSW_COMPILER_MSVC +#pragma comment( lib, "comctl32.lib" ) +#pragma comment( lib, "user32.lib" ) +#pragma comment( lib, "ole32.lib" ) + +// disable secure warnings +#pragma warning( disable : 4996 ) +#endif + +namespace efsw { + +class WatcherWin32; + +enum RefreshResult { Failed, Success, SucessEx }; + +/// Internal watch data +struct WatcherStructWin32 { + OVERLAPPED Overlapped; + WatcherWin32* Watch; +}; + +struct sLastModifiedEvent { + FileInfo file; + std::string fileName; +}; + +RefreshResult RefreshWatch( WatcherStructWin32* pWatch ); + +void CALLBACK WatchCallback( DWORD dwNumberOfBytesTransfered, LPOVERLAPPED lpOverlapped ); + +void DestroyWatch( WatcherStructWin32* pWatch ); + +WatcherStructWin32* CreateWatch( LPCWSTR szDirectory, bool recursive, + DWORD bufferSize, DWORD notifyFilter, HANDLE iocp ); + +class WatcherWin32 : public Watcher { + public: + WatcherWin32(DWORD dwBufferSize) : + Struct( NULL ), + DirHandle( NULL ), + Buffer(), + lParam( 0 ), + NotifyFilter( 0 ), + StopNow( false ), + Extended( false ), + Watch( NULL ), + DirName( NULL ) { + Buffer.resize(dwBufferSize); + } + + WatcherStructWin32* Struct; + HANDLE DirHandle; + std::vector Buffer; + LPARAM lParam; + DWORD NotifyFilter; + bool StopNow; + bool Extended; + FileWatcherImpl* Watch; + char* DirName; + sLastModifiedEvent LastModifiedEvent; + std::vector> OldFiles; +}; + +} // namespace efsw + +#endif + +#endif diff --git a/src/efsw/base.hpp b/src/efsw/base.hpp new file mode 100644 index 0000000..43abc4f --- /dev/null +++ b/src/efsw/base.hpp @@ -0,0 +1,129 @@ +#ifndef EFSW_BASE +#define EFSW_BASE + +#include +#include + +namespace efsw { + +typedef SOPHIST_int8 Int8; +typedef SOPHIST_uint8 Uint8; +typedef SOPHIST_int16 Int16; +typedef SOPHIST_uint16 Uint16; +typedef SOPHIST_int32 Int32; +typedef SOPHIST_uint32 Uint32; +typedef SOPHIST_int64 Int64; +typedef SOPHIST_uint64 Uint64; + +#define EFSW_OS_WIN 1 +#define EFSW_OS_LINUX 2 +#define EFSW_OS_MACOSX 3 +#define EFSW_OS_BSD 4 +#define EFSW_OS_SOLARIS 5 +#define EFSW_OS_HAIKU 6 +#define EFSW_OS_ANDROID 7 +#define EFSW_OS_IOS 8 + +#define EFSW_PLATFORM_WIN32 1 +#define EFSW_PLATFORM_INOTIFY 2 +#define EFSW_PLATFORM_KQUEUE 3 +#define EFSW_PLATFORM_FSEVENTS 4 +#define EFSW_PLATFORM_GENERIC 5 + +#if defined( _WIN32 ) +/// Any Windows platform +#define EFSW_OS EFSW_OS_WIN +#define EFSW_PLATFORM EFSW_PLATFORM_WIN32 + +#if ( defined( _MSCVER ) || defined( _MSC_VER ) ) +#define EFSW_COMPILER_MSVC +#endif + +/// Force windows target version above or equal to Windows Server 2008 or Windows Vista +#if _WIN32_WINNT < 0x600 +#undef _WIN32_WINNT +#define _WIN32_WINNT 0x600 +#endif +#elif defined( __FreeBSD__ ) || defined( __OpenBSD__ ) || defined( __NetBSD__ ) || \ + defined( __DragonFly__ ) +#define EFSW_OS EFSW_OS_BSD +#define EFSW_PLATFORM EFSW_PLATFORM_KQUEUE + +#elif defined( __APPLE_CC__ ) || defined( __APPLE__ ) +#include + +#if defined( __IPHONE__ ) || ( defined( TARGET_OS_IPHONE ) && TARGET_OS_IPHONE ) || \ + ( defined( TARGET_IPHONE_SIMULATOR ) && TARGET_IPHONE_SIMULATOR ) +#define EFSW_OS EFSW_OS_IOS +#define EFSW_PLATFORM EFSW_PLATFORM_KQUEUE +#else +#define EFSW_OS EFSW_OS_MACOSX + +#if defined( EFSW_FSEVENTS_NOT_SUPPORTED ) +#define EFSW_PLATFORM EFSW_PLATFORM_KQUEUE +#else +#define EFSW_PLATFORM EFSW_PLATFORM_FSEVENTS +#endif +#endif + +#elif defined( __linux__ ) +/// This includes Linux and Android +#ifndef EFSW_KQUEUE +#define EFSW_PLATFORM EFSW_PLATFORM_INOTIFY +#else +/// This is for testing libkqueue, sadly it doesnt work +#define EFSW_PLATFORM EFSW_PLATFORM_KQUEUE +#endif + +#if defined( __ANDROID__ ) || defined( ANDROID ) +#define EFSW_OS EFSW_OS_ANDROID +#else +#define EFSW_OS EFSW_OS_LINUX +#endif + +#else +#if defined( __SVR4 ) +#define EFSW_OS EFSW_OS_SOLARIS +#elif defined( __HAIKU__ ) || defined( __BEOS__ ) +#define EFSW_OS EFSW_OS_HAIKU +#endif + +/// Everything else +#define EFSW_PLATFORM EFSW_PLATFORM_GENERIC +#endif + +#if EFSW_PLATFORM != EFSW_PLATFORM_WIN32 +#define EFSW_PLATFORM_POSIX +#endif + +#if 1 == SOPHIST_pointer64 +#define EFSW_64BIT +#else +#define EFSW_32BIT +#endif + +#if defined( arm ) || defined( __arm__ ) +#define EFSW_ARM +#endif + +#define efCOMMA , + +#define efSAFE_DELETE( p ) \ + { \ + if ( p ) { \ + delete ( p ); \ + ( p ) = NULL; \ + } \ + } +#define efSAFE_DELETE_ARRAY( p ) \ + { \ + if ( p ) { \ + delete[] ( p ); \ + ( p ) = NULL; \ + } \ + } +#define efARRAY_SIZE( __array ) ( sizeof( __array ) / sizeof( __array[0] ) ) + +} // namespace efsw + +#endif diff --git a/src/efsw/inotify-nosys.h b/src/efsw/inotify-nosys.h new file mode 100644 index 0000000..be1e627 --- /dev/null +++ b/src/efsw/inotify-nosys.h @@ -0,0 +1,164 @@ +#ifndef _LINUX_INOTIFY_H +#define _LINUX_INOTIFY_H + +#include +#include +#include + +/* + * struct inotify_event - structure read from the inotify device for each event + * + * When you are watching a directory, you will receive the filename for events + * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd. + */ +struct inotify_event { + int wd; /* watch descriptor */ + uint32_t mask; /* watch mask */ + uint32_t cookie; /* cookie to synchronize two events */ + uint32_t len; /* length (including nulls) of name */ + char name __flexarr; /* stub for possible name */ +}; + +/* the following are legal, implemented events that user-space can watch for */ +#define IN_ACCESS 0x00000001 /* File was accessed */ +#define IN_MODIFY 0x00000002 /* File was modified */ +#define IN_ATTRIB 0x00000004 /* Metadata changed */ +#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */ +#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */ +#define IN_OPEN 0x00000020 /* File was opened */ +#define IN_MOVED_FROM 0x00000040 /* File was moved from X */ +#define IN_MOVED_TO 0x00000080 /* File was moved to Y */ +#define IN_CREATE 0x00000100 /* Subfile was created */ +#define IN_DELETE 0x00000200 /* Subfile was deleted */ +#define IN_DELETE_SELF 0x00000400 /* Self was deleted */ +#define IN_MOVE_SELF 0x00000800 /* Self was moved */ + +/* the following are legal events. they are sent as needed to any watch */ +#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */ +#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ +#define IN_IGNORED 0x00008000 /* File was ignored */ + +/* helper events */ +#define IN_CLOSE (IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */ +#define IN_MOVE (IN_MOVED_FROM | IN_MOVED_TO) /* moves */ + +/* special flags */ +#define IN_ONLYDIR 0x01000000 /* only watch the path if it is a directory */ +#define IN_DONT_FOLLOW 0x02000000 /* don't follow a sym link */ +#define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */ +#define IN_ISDIR 0x40000000 /* event occurred against dir */ +#define IN_ONESHOT 0x80000000 /* only send event once */ + +/* + * All of the events - we build the list by hand so that we can add flags in + * the future and not break backward compatibility. Apps will get only the + * events that they originally wanted. Be sure to add new events here! + */ +#define IN_ALL_EVENTS (IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \ + IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \ + IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \ + IN_MOVE_SELF) + +#if defined (__alpha__) +# define __NR_inotify_init 444 +# define __NR_inotify_add_watch 445 +# define __NR_inotify_rm_watch 446 + +#elif defined (__arm__) +# define __NR_inotify_init (__NR_SYSCALL_BASE+316) +# define __NR_inotify_add_watch (__NR_SYSCALL_BASE+317) +# define __NR_inotify_rm_watch (__NR_SYSCALL_BASE+318) + +#elif defined (__aarch64__) +# define __NR_inotify_init 1043 +# define __NR_inotify_add_watch 27 +# define __NR_inotify_rm_watch 28 + +#elif defined (__frv__) +# define __NR_inotify_init 291 +# define __NR_inotify_add_watch 292 +# define __NR_inotify_rm_watch 293 + +#elif defined(__i386__) +# define __NR_inotify_init 291 +# define __NR_inotify_add_watch 292 +# define __NR_inotify_rm_watch 293 + +#elif defined (__ia64__) +# define __NR_inotify_init 1277 +# define __NR_inotify_add_watch 1278 +# define __NR_inotify_rm_watch 1279 + +#elif defined (__mips__) +# if _MIPS_SIM == _MIPS_SIM_ABI32 +# define __NR_inotify_init (__NR_Linux + 284) +# define __NR_inotify_add_watch (__NR_Linux + 285) +# define __NR_inotify_rm_watch (__NR_Linux + 286) +# endif +# if _MIPS_SIM == _MIPS_SIM_ABI64 +# define __NR_inotify_init (__NR_Linux + 243) +# define __NR_inotify_add_watch (__NR_Linux + 243) +# define __NR_inotify_rm_watch (__NR_Linux + 243) +# endif +# if _MIPS_SIM == _MIPS_SIM_NABI32 +# define __NR_inotify_init (__NR_Linux + 247) +# define __NR_inotify_add_watch (__NR_Linux + 248) +# define __NR_inotify_rm_watch (__NR_Linux + 249) +# endif + +#elif defined(__parisc__) +# define __NR_inotify_init (__NR_Linux + 269) +# define __NR_inotify_add_watch (__NR_Linux + 270) +# define __NR_inotify_rm_watch (__NR_Linux + 271) + +#elif defined(__powerpc__) || defined(__powerpc64__) +# define __NR_inotify_init 275 +# define __NR_inotify_add_watch 276 +# define __NR_inotify_rm_watch 277 + +#elif defined (__s390__) +# define __NR_inotify_init 284 +# define __NR_inotify_add_watch 285 +# define __NR_inotify_rm_watch 286 + +#elif defined (__sh__) +# define __NR_inotify_init 290 +# define __NR_inotify_add_watch 291 +# define __NR_inotify_rm_watch 292 + +#elif defined (__sh64__) +# define __NR_inotify_init 318 +# define __NR_inotify_add_watch 319 +# define __NR_inotify_rm_watch 320 + +#elif defined (__sparc__) || defined (__sparc64__) +# define __NR_inotify_init 151 +# define __NR_inotify_add_watch 152 +# define __NR_inotify_rm_watch 156 + +#elif defined(__x86_64__) +# define __NR_inotify_init 253 +# define __NR_inotify_add_watch 254 +# define __NR_inotify_rm_watch 255 + +#else +# error "Unsupported architecture!" +#endif + +static inline int inotify_init (void) +{ + return syscall (__NR_inotify_init); +} + +static inline int inotify_add_watch (int fd, const char *name, uint32_t mask) +{ + return syscall (__NR_inotify_add_watch, fd, name, mask); +} + +static inline int inotify_rm_watch (int fd, uint32_t wd) +{ + return syscall (__NR_inotify_rm_watch, fd, wd); +} + + +#endif /* _LINUX_INOTIFY_H */ diff --git a/src/efsw/platform/platformimpl.hpp b/src/efsw/platform/platformimpl.hpp new file mode 100644 index 0000000..f494241 --- /dev/null +++ b/src/efsw/platform/platformimpl.hpp @@ -0,0 +1,16 @@ +#ifndef EFSW_PLATFORMIMPL_HPP +#define EFSW_PLATFORMIMPL_HPP + +#include + +#if defined( EFSW_PLATFORM_POSIX ) +#include +#include +#elif EFSW_PLATFORM == EFSW_PLATFORM_WIN32 +#include +#include +#else +#error Thread, Mutex, and System not implemented for this platform. +#endif + +#endif diff --git a/src/efsw/platform/posix/FileSystemImpl.cpp b/src/efsw/platform/posix/FileSystemImpl.cpp new file mode 100644 index 0000000..92eeb47 --- /dev/null +++ b/src/efsw/platform/posix/FileSystemImpl.cpp @@ -0,0 +1,251 @@ +#include + +#if defined( EFSW_PLATFORM_POSIX ) + +#include +#include +#include +#include +#include + +#ifndef _DARWIN_FEATURE_64_BIT_INODE +#define _DARWIN_FEATURE_64_BIT_INODE +#endif + +#ifndef _FILE_OFFSET_BITS +#define _FILE_OFFSET_BITS 64 +#endif + +#include +#include +#include + +#if EFSW_OS == EFSW_OS_LINUX || EFSW_OS == EFSW_OS_SOLARIS || EFSW_OS == EFSW_OS_ANDROID +#include +#elif EFSW_OS == EFSW_OS_MACOSX || EFSW_OS == EFSW_OS_BSD || EFSW_OS == EFSW_OS_IOS +#include +#include +#endif + +/** Remote file systems codes */ +#define S_MAGIC_AFS 0x5346414F +#define S_MAGIC_AUFS 0x61756673 +#define S_MAGIC_CEPH 0x00C36400 +#define S_MAGIC_CIFS 0xFF534D42 +#define S_MAGIC_CODA 0x73757245 +#define S_MAGIC_FHGFS 0x19830326 +#define S_MAGIC_FUSEBLK 0x65735546 +#define S_MAGIC_FUSECTL 0x65735543 +#define S_MAGIC_GFS 0x01161970 +#define S_MAGIC_GPFS 0x47504653 +#define S_MAGIC_KAFS 0x6B414653 +#define S_MAGIC_LUSTRE 0x0BD00BD0 +#define S_MAGIC_NCP 0x564C +#define S_MAGIC_NFS 0x6969 +#define S_MAGIC_NFSD 0x6E667364 +#define S_MAGIC_OCFS2 0x7461636F +#define S_MAGIC_PANFS 0xAAD7AAEA +#define S_MAGIC_PIPEFS 0x50495045 +#define S_MAGIC_SMB 0x517B +#define S_MAGIC_SNFS 0xBEEFDEAD +#define S_MAGIC_VMHGFS 0xBACBACBC +#define S_MAGIC_VXFS 0xA501FCF5 + +#if EFSW_OS == EFSW_OS_LINUX +#include +#include +#endif + +namespace efsw { namespace Platform { + +#if EFSW_OS == EFSW_OS_LINUX + +std::string findMountPoint( std::string file ) { + std::string cwd = FileSystem::getCurrentWorkingDirectory(); + struct stat last_stat; + struct stat file_stat; + + stat( file.c_str(), &file_stat ); + + std::string mp; + + if ( efsw::FileSystem::isDirectory( file ) ) { + last_stat = file_stat; + + if ( !FileSystem::changeWorkingDirectory( file ) ) + return ""; + } else { + std::string dir = efsw::FileSystem::pathRemoveFileName( file ); + + if ( !FileSystem::changeWorkingDirectory( dir ) ) + return ""; + + if ( stat( ".", &last_stat ) < 0 ) + return ""; + } + + while ( true ) { + struct stat st; + + if ( stat( "..", &st ) < 0 ) + goto done; + + if ( st.st_dev != last_stat.st_dev || st.st_ino == last_stat.st_ino ) + break; + + if ( !FileSystem::changeWorkingDirectory( ".." ) ) { + goto done; + } + + last_stat = st; + } + + /* Finally reached a mount point, see what it's called. */ + mp = FileSystem::getCurrentWorkingDirectory(); + +done: + FileSystem::changeWorkingDirectory( cwd ); + + return mp; +} + +std::string findDevicePath( const std::string& directory ) { + struct mntent* ent; + FILE* aFile; + + aFile = setmntent( "/proc/mounts", "r" ); + + if ( aFile == NULL ) + return ""; + + while ( NULL != ( ent = getmntent( aFile ) ) ) { + std::string dirName( ent->mnt_dir ); + + if ( dirName == directory ) { + std::string fsName( ent->mnt_fsname ); + + endmntent( aFile ); + + return fsName; + } + } + + endmntent( aFile ); + + return ""; +} + +bool isLocalFUSEDirectory( std::string directory ) { + efsw::FileSystem::dirRemoveSlashAtEnd( directory ); + + directory = findMountPoint( directory ); + + if ( !directory.empty() ) { + std::string devicePath = findDevicePath( directory ); + + return !devicePath.empty(); + } + + return false; +} + +#endif + +bool FileSystem::changeWorkingDirectory( const std::string& path ) { + return -1 != chdir( path.c_str() ); +} + +std::string FileSystem::getCurrentWorkingDirectory() { + char dir[PATH_MAX + 1]; + char* result = getcwd( dir, PATH_MAX + 1 ); + return result != NULL ? std::string( result ) : std::string(); +} + +FileInfoMap FileSystem::filesInfoFromPath( const std::string& path ) { + FileInfoMap files; + + DIR* dp; + struct dirent* dirp; + + if ( ( dp = opendir( path.c_str() ) ) == NULL ) + return files; + + while ( ( dirp = readdir( dp ) ) != NULL ) { + if ( strcmp( dirp->d_name, ".." ) != 0 && strcmp( dirp->d_name, "." ) != 0 ) { + std::string name( dirp->d_name ); + std::string fpath( path + name ); + + files[name] = FileInfo( fpath ); + } + } + + closedir( dp ); + + return files; +} + +char FileSystem::getOSSlash() { + return '/'; +} + +bool FileSystem::isDirectory( const std::string& path ) { + struct stat st; + int res = stat( path.c_str(), &st ); + + if ( 0 == res ) { + return static_cast( S_ISDIR( st.st_mode ) ); + } + + return false; +} + +bool FileSystem::isRemoteFS( const std::string& directory ) { +#if EFSW_OS == EFSW_OS_LINUX || EFSW_OS == EFSW_OS_MACOSX || EFSW_OS == EFSW_OS_BSD || \ + EFSW_OS == EFSW_OS_SOLARIS || EFSW_OS == EFSW_OS_ANDROID || EFSW_OS == EFSW_OS_IOS + struct statfs statfsbuf; + + statfs( directory.c_str(), &statfsbuf ); + + switch ( statfsbuf.f_type | 0UL ) { + case S_MAGIC_FUSEBLK: /* 0x65735546 remote */ + { +#if EFSW_OS == EFSW_OS_LINUX + return !isLocalFUSEDirectory( directory ); +#endif + } + case S_MAGIC_AFS: /* 0x5346414F remote */ + case S_MAGIC_AUFS: /* 0x61756673 remote */ + case S_MAGIC_CEPH: /* 0x00C36400 remote */ + case S_MAGIC_CIFS: /* 0xFF534D42 remote */ + case S_MAGIC_CODA: /* 0x73757245 remote */ + case S_MAGIC_FHGFS: /* 0x19830326 remote */ + case S_MAGIC_FUSECTL: /* 0x65735543 remote */ + case S_MAGIC_GFS: /* 0x01161970 remote */ + case S_MAGIC_GPFS: /* 0x47504653 remote */ + case S_MAGIC_KAFS: /* 0x6B414653 remote */ + case S_MAGIC_LUSTRE: /* 0x0BD00BD0 remote */ + case S_MAGIC_NCP: /* 0x564C remote */ + case S_MAGIC_NFS: /* 0x6969 remote */ + case S_MAGIC_NFSD: /* 0x6E667364 remote */ + case S_MAGIC_OCFS2: /* 0x7461636F remote */ + case S_MAGIC_PANFS: /* 0xAAD7AAEA remote */ + case S_MAGIC_PIPEFS: /* 0x50495045 remote */ + case S_MAGIC_SMB: /* 0x517B remote */ + case S_MAGIC_SNFS: /* 0xBEEFDEAD remote */ + case S_MAGIC_VMHGFS: /* 0xBACBACBC remote */ + case S_MAGIC_VXFS: /* 0xA501FCF5 remote */ + { + return true; + } + default: { + return false; + } + } +#endif + + return false; +} + +}} // namespace efsw::Platform + +#endif diff --git a/src/efsw/platform/posix/FileSystemImpl.hpp b/src/efsw/platform/posix/FileSystemImpl.hpp new file mode 100644 index 0000000..0bfba76 --- /dev/null +++ b/src/efsw/platform/posix/FileSystemImpl.hpp @@ -0,0 +1,30 @@ +#ifndef EFSW_FILESYSTEMIMPLPOSIX_HPP +#define EFSW_FILESYSTEMIMPLPOSIX_HPP + +#include +#include + +#if defined( EFSW_PLATFORM_POSIX ) + +namespace efsw { namespace Platform { + +class FileSystem { + public: + static FileInfoMap filesInfoFromPath( const std::string& path ); + + static char getOSSlash(); + + static bool isDirectory( const std::string& path ); + + static bool isRemoteFS( const std::string& directory ); + + static bool changeWorkingDirectory( const std::string& path ); + + static std::string getCurrentWorkingDirectory(); +}; + +}} // namespace efsw::Platform + +#endif + +#endif diff --git a/src/efsw/platform/posix/SystemImpl.cpp b/src/efsw/platform/posix/SystemImpl.cpp new file mode 100644 index 0000000..37d4120 --- /dev/null +++ b/src/efsw/platform/posix/SystemImpl.cpp @@ -0,0 +1,168 @@ +#include + +#if defined( EFSW_PLATFORM_POSIX ) + +#include +#include +#include +#include +#include + +#include +#include + +#if EFSW_OS == EFSW_OS_MACOSX +#include +#elif EFSW_OS == EFSW_OS_LINUX || EFSW_OS == EFSW_OS_ANDROID +#include +#include +#elif EFSW_OS == EFSW_OS_HAIKU +#include +#include +#elif EFSW_OS == EFSW_OS_SOLARIS +#include +#elif EFSW_OS == EFSW_OS_BSD +#include +#endif + +namespace efsw { namespace Platform { + +void System::sleep( const unsigned long& ms ) { + // usleep( static_cast( ms * 1000 ) ); + + // usleep is not reliable enough (it might block the + // whole process instead of just the current thread) + // so we must use pthread_cond_timedwait instead + + // this implementation is inspired from Qt + // and taken from SFML + + unsigned long long usecs = ms * 1000; + + // get the current time + timeval tv; + gettimeofday( &tv, NULL ); + + // construct the time limit (current time + time to wait) + timespec ti; + ti.tv_nsec = ( tv.tv_usec + ( usecs % 1000000 ) ) * 1000; + ti.tv_sec = tv.tv_sec + ( usecs / 1000000 ) + ( ti.tv_nsec / 1000000000 ); + ti.tv_nsec %= 1000000000; + + // create a mutex and thread condition + pthread_mutex_t mutex; + pthread_mutex_init( &mutex, 0 ); + pthread_cond_t condition; + pthread_cond_init( &condition, 0 ); + + // wait... + pthread_mutex_lock( &mutex ); + pthread_cond_timedwait( &condition, &mutex, &ti ); + pthread_mutex_unlock( &mutex ); + + // destroy the mutex and condition + pthread_cond_destroy( &condition ); +} + +std::string System::getProcessPath() { +#if EFSW_OS == EFSW_OS_MACOSX + char exe_file[FILENAME_MAX + 1]; + + CFBundleRef mainBundle = CFBundleGetMainBundle(); + + if ( mainBundle ) { + CFURLRef mainURL = CFBundleCopyBundleURL( mainBundle ); + + if ( mainURL ) { + int ok = CFURLGetFileSystemRepresentation( mainURL, ( Boolean ) true, (UInt8*)exe_file, + FILENAME_MAX ); + + if ( ok ) { + return std::string( exe_file ) + "/"; + } + } + } + + return "./"; +#elif EFSW_OS == EFSW_OS_LINUX + char exe_file[FILENAME_MAX + 1]; + + int size; + + size = readlink( "/proc/self/exe", exe_file, FILENAME_MAX ); + + if ( size < 0 ) { + return std::string( "./" ); + } else { + exe_file[size] = '\0'; + return std::string( dirname( exe_file ) ) + "/"; + } + +#elif EFSW_OS == EFSW_OS_BSD + int mib[4]; + mib[0] = CTL_KERN; + mib[1] = KERN_PROC; + mib[2] = KERN_PROC_PATHNAME; + mib[3] = -1; + char buf[1024]; + size_t cb = sizeof( buf ); + sysctl( mib, 4, buf, &cb, NULL, 0 ); + + return FileSystem::pathRemoveFileName( std::string( buf ) ); + +#elif EFSW_OS == EFSW_OS_SOLARIS + return FileSystem::pathRemoveFileName( std::string( getexecname() ) ); + +#elif EFSW_OS == EFSW_OS_HAIKU + image_info info; + int32 cookie = 0; + + while ( B_OK == get_next_image_info( 0, &cookie, &info ) ) { + if ( info.type == B_APP_IMAGE ) + break; + } + + return FileSystem::pathRemoveFileName( std::string( info.name ) ); + +#elif EFSW_OS == EFSW_OS_ANDROID + return "/sdcard/"; + +#else +#warning getProcessPath() not implemented on this platform. ( will return "./" ) + return "./"; + +#endif +} + +void System::maxFD() { + static bool maxed = false; + + if ( !maxed ) { + struct rlimit limit; + getrlimit( RLIMIT_NOFILE, &limit ); + limit.rlim_cur = limit.rlim_max; + setrlimit( RLIMIT_NOFILE, &limit ); + + getrlimit( RLIMIT_NOFILE, &limit ); + + efDEBUG( "File descriptor limit %ld\n", limit.rlim_cur ); + + maxed = true; + } +} + +Uint64 System::getMaxFD() { + static rlim_t max_fd = 0; + + if ( max_fd == 0 ) { + struct rlimit limit; + getrlimit( RLIMIT_NOFILE, &limit ); + max_fd = limit.rlim_cur; + } + + return max_fd; +} + +}} // namespace efsw::Platform + +#endif diff --git a/src/efsw/platform/posix/SystemImpl.hpp b/src/efsw/platform/posix/SystemImpl.hpp new file mode 100644 index 0000000..9322b06 --- /dev/null +++ b/src/efsw/platform/posix/SystemImpl.hpp @@ -0,0 +1,25 @@ +#ifndef EFSW_SYSTEMIMPLPOSIX_HPP +#define EFSW_SYSTEMIMPLPOSIX_HPP + +#include + +#if defined( EFSW_PLATFORM_POSIX ) + +namespace efsw { namespace Platform { + +class System { + public: + static void sleep( const unsigned long& ms ); + + static std::string getProcessPath(); + + static void maxFD(); + + static Uint64 getMaxFD(); +}; + +}} // namespace efsw::Platform + +#endif + +#endif diff --git a/src/efsw/platform/win/FileSystemImpl.cpp b/src/efsw/platform/win/FileSystemImpl.cpp new file mode 100644 index 0000000..2b87513 --- /dev/null +++ b/src/efsw/platform/win/FileSystemImpl.cpp @@ -0,0 +1,111 @@ +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +#include +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#include + +#ifndef EFSW_COMPILER_MSVC +#include +#else +#include +#endif + +namespace efsw { namespace Platform { + +bool FileSystem::changeWorkingDirectory( const std::string& path ) { + int res; +#ifdef EFSW_COMPILER_MSVC +#ifdef UNICODE + res = _wchdir( String::fromUtf8( path.c_str() ).toWideString().c_str() ); +#else + res = _chdir( String::fromUtf8( path.c_str() ).toAnsiString().c_str() ); +#endif +#else + res = chdir( path.c_str() ); +#endif + return -1 != res; +} + +std::string FileSystem::getCurrentWorkingDirectory() { +#ifdef EFSW_COMPILER_MSVC +#if defined( UNICODE ) && !defined( EFSW_NO_WIDECHAR ) + wchar_t dir[_MAX_PATH]; + return ( 0 != GetCurrentDirectoryW( _MAX_PATH, dir ) ) ? String( dir ).toUtf8() : std::string(); +#else + char dir[_MAX_PATH]; + return ( 0 != GetCurrentDirectory( _MAX_PATH, dir ) ) ? String( dir, std::locale() ).toUtf8() + : std::string(); +#endif +#else + char dir[PATH_MAX + 1]; + getcwd( dir, PATH_MAX + 1 ); + return std::string( dir ); +#endif +} + +FileInfoMap FileSystem::filesInfoFromPath( const std::string& path ) { + FileInfoMap files; + + String tpath( path ); + + if ( tpath[tpath.size() - 1] == '/' || tpath[tpath.size() - 1] == '\\' ) { + tpath += "*"; + } else { + tpath += "\\*"; + } + + WIN32_FIND_DATAW findFileData; + HANDLE hFind = FindFirstFileW( (LPCWSTR)tpath.toWideString().c_str(), &findFileData ); + + if ( hFind != INVALID_HANDLE_VALUE ) { + std::string name( String( findFileData.cFileName ).toUtf8() ); + std::string fpath( path + name ); + + if ( name != "." && name != ".." ) { + files[name] = FileInfo( fpath ); + } + + while ( FindNextFileW( hFind, &findFileData ) ) { + name = String( findFileData.cFileName ).toUtf8(); + fpath = path + name; + + if ( name != "." && name != ".." ) { + files[name] = FileInfo( fpath ); + } + } + + FindClose( hFind ); + } + + return files; +} + +char FileSystem::getOSSlash() { + return '\\'; +} + +bool FileSystem::isDirectory( const std::string& path ) { + DWORD attrs = GetFileAttributesW( String( path ).toWideString().c_str() ); + return attrs != INVALID_FILE_ATTRIBUTES && ( attrs & FILE_ATTRIBUTE_DIRECTORY ) != 0; +} + +bool FileSystem::isRemoteFS( const std::string& directory ) { + if ( ( directory[0] == '\\' || directory[0] == '/' ) && + ( directory[1] == '\\' || directory[1] == '/' ) ) { + return true; + } + + if ( directory.size() >= 3 ) { + return 4 == GetDriveTypeA( directory.substr( 0, 3 ).c_str() ); + } + + return false; +} + +}} // namespace efsw::Platform + +#endif diff --git a/src/efsw/platform/win/FileSystemImpl.hpp b/src/efsw/platform/win/FileSystemImpl.hpp new file mode 100644 index 0000000..e952efc --- /dev/null +++ b/src/efsw/platform/win/FileSystemImpl.hpp @@ -0,0 +1,31 @@ +#ifndef EFSW_FILESYSTEMIMPLWIN_HPP +#define EFSW_FILESYSTEMIMPLWIN_HPP + +#include +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +namespace efsw { namespace Platform { + +class FileSystem { + public: + static FileInfoMap filesInfoFromPath( const std::string& path ); + + static char getOSSlash(); + + static bool isDirectory( const std::string& path ); + + static bool isRemoteFS( const std::string& directory ); + + static bool changeWorkingDirectory( const std::string& path ); + + static std::string getCurrentWorkingDirectory(); +}; + +}} // namespace efsw::Platform + +#endif + +#endif diff --git a/src/efsw/platform/win/SystemImpl.cpp b/src/efsw/platform/win/SystemImpl.cpp new file mode 100644 index 0000000..d1f2b21 --- /dev/null +++ b/src/efsw/platform/win/SystemImpl.cpp @@ -0,0 +1,46 @@ +#include +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#include +#include + +namespace efsw { namespace Platform { + +void System::sleep( const unsigned long& ms ) { + ::Sleep( ms ); +} + +std::string System::getProcessPath() { + // Get path to executable: + WCHAR szDrive[_MAX_DRIVE]; + WCHAR szDir[_MAX_DIR]; + WCHAR szFilename[_MAX_DIR]; + WCHAR szExt[_MAX_DIR]; + std::wstring dllName( _MAX_DIR, 0 ); + + GetModuleFileNameW( 0, &dllName[0], _MAX_PATH ); + +#ifdef EFSW_COMPILER_MSVC + _wsplitpath_s( dllName.c_str(), szDrive, _MAX_DRIVE, szDir, _MAX_DIR, szFilename, _MAX_DIR, + szExt, _MAX_DIR ); +#else + _wsplitpath( dllName.c_str(), szDrive, szDir, szFilename, szExt ); +#endif + + return String( szDrive ).toUtf8() + String( szDir ).toUtf8(); +} + +void System::maxFD() {} + +Uint64 System::getMaxFD() { // Number of ReadDirectory per thread + return 60; +} + +}} // namespace efsw::Platform + +#endif diff --git a/src/efsw/platform/win/SystemImpl.hpp b/src/efsw/platform/win/SystemImpl.hpp new file mode 100644 index 0000000..99b4867 --- /dev/null +++ b/src/efsw/platform/win/SystemImpl.hpp @@ -0,0 +1,25 @@ +#ifndef EFSW_SYSTEMIMPLWIN_HPP +#define EFSW_SYSTEMIMPLWIN_HPP + +#include + +#if EFSW_PLATFORM == EFSW_PLATFORM_WIN32 + +namespace efsw { namespace Platform { + +class System { + public: + static void sleep( const unsigned long& ms ); + + static std::string getProcessPath(); + + static void maxFD(); + + static Uint64 getMaxFD(); +}; + +}} // namespace efsw::Platform + +#endif + +#endif diff --git a/src/efsw/sophist.h b/src/efsw/sophist.h new file mode 100644 index 0000000..82e5c36 --- /dev/null +++ b/src/efsw/sophist.h @@ -0,0 +1,147 @@ +/* sophist.h - 0.3 - public domain - Sean Barrett 2010 +** Knowledge drawn from Brian Hook's posh.h and http://predef.sourceforge.net +** Sophist provides portable types; you typedef/#define them to your own names +** +** defines: +** - SOPHIST_endian - either SOPHIST_little_endian or SOPHIST_big_endian +** - SOPHIST_has_64 - either 0 or 1; if 0, int64 types aren't defined +** - SOPHIST_pointer64 - either 0 or 1; if 1, pointer is 64-bit +** +** - SOPHIST_intptr, SOPHIST_uintptr - integer same size as pointer +** - SOPHIST_int8, SOPHIST_uint8, SOPHIST_int16, SOPHIST_uint16 +** - SOPHIST_int32, SOPHIST_uint32, SOPHIST_int64, SOPHIST_uint64 +** - SOPHIST_int64_constant(number) - macros for creating 64-bit +** - SOPHIST_uint64_constant(number) integer constants +** - SOPHIST_printf_format64 - string for printf format for int64 +*/ + +#ifndef __INCLUDE_SOPHIST_H__ +#define __INCLUDE_SOPHIST_H__ + +#define SOPHIST_compiletime_assert(name,val) \ + typedef int SOPHIST__assert##name[(val) ? 1 : -1] + +/* define a couple synthetic rules to make code more readable */ +#if (defined(__sparc__) || defined(__sparc)) && \ + (defined(__arch64__) || defined(__sparcv9) || defined(__sparc_v9__)) + #define SOPHIST_sparc64 +#endif + +#if (defined(linux) || defined(__linux__)) && \ + (defined(__alpha)||defined(__alpha__)||defined(__x86_64__)||defined(_M_X64)) + #define SOPHIST_linux64 +#endif + +/* basic types */ +typedef signed char SOPHIST_int8; +typedef unsigned char SOPHIST_uint8; + +typedef signed short SOPHIST_int16; +typedef unsigned short SOPHIST_uint16; + +#ifdef __palmos__ + typedef signed long SOPHIST_int32; + typedef unsigned long SOPHIST_uint32; +#else + typedef signed int SOPHIST_int32; + typedef unsigned int SOPHIST_uint32; +#endif + +#ifndef SOPHIST_NO_64 + #if defined(_MSC_VER) || defined(__WATCOMC__) || defined(__BORLANDC__) \ + || (defined(__alpha) && defined(__DECC)) + + typedef signed __int64 SOPHIST_int64; + typedef unsigned __int64 SOPHIST_uint64; + #define SOPHIST_has_64 1 + #define SOPHIST_int64_constant(x) (x##i64) + #define SOPHIST_uint64_constant(x) (x##ui64) + #define SOPHIST_printf_format64 "I64" + + #elif defined(__LP64__) || defined(__powerpc64__) || defined(SOPHIST_sparc64) + + typedef signed long SOPHIST_int64; + typedef unsigned long SOPHIST_uint64; + + #define SOPHIST_has_64 1 + #define SOPHIST_int64_constant(x) ((SOPHIST_int64) x) + #define SOPHIST_uint64_constant(x) ((SOPHIST_uint64) x) + #define SOPHIST_printf_format64 "l" + + #elif defined(_LONG_LONG) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) \ + || defined(__GNUC__) || defined(__MWERKS__) || defined(__APPLE_CC__) \ + || defined(sgi) || defined (__sgi) || defined(__sgi__) \ + || defined(_CRAYC) + + typedef signed long long SOPHIST_int64; + typedef unsigned long long SOPHIST_uint64; + + #define SOPHIST_has_64 1 + #define SOPHIST_int64_constant(x) (x##LL) + #define SOPHIST_uint64_constant(x) (x##ULL) + #define SOPHIST_printf_format64 "ll" + #endif +#endif + +#ifndef SOPHIST_has_64 +#define SOPHIST_has_64 0 +#endif + +SOPHIST_compiletime_assert( int8 , sizeof(SOPHIST_int8 ) == 1); +SOPHIST_compiletime_assert(uint16, sizeof(SOPHIST_int16) == 2); +SOPHIST_compiletime_assert( int32, sizeof(SOPHIST_int32 ) == 4); +SOPHIST_compiletime_assert(uint32, sizeof(SOPHIST_uint32) == 4); + +#if SOPHIST_has_64 + SOPHIST_compiletime_assert( int64, sizeof(SOPHIST_int64 ) == 8); + SOPHIST_compiletime_assert(uint64, sizeof(SOPHIST_uint64) == 8); +#endif + +/* determine whether pointers are 64-bit */ + +#if defined(SOPHIST_linux64) || defined(SOPHIST_sparc64) \ + || defined(__osf__) || (defined(_WIN64) && !defined(_XBOX)) \ + || defined(__64BIT__) \ + || defined(__LP64) || defined(__LP64__) || defined(_LP64) \ + || defined(_ADDR64) || defined(_CRAYC) \ + + #define SOPHIST_pointer64 1 + + SOPHIST_compiletime_assert(pointer64, sizeof(void*) == 8); + + typedef SOPHIST_int64 SOPHIST_intptr; + typedef SOPHIST_uint64 SOPHIST_uintptr; +#else + + #define SOPHIST_pointer64 0 + + SOPHIST_compiletime_assert(pointer64, sizeof(void*) <= 4); + + /* do we care about pointers that are only 16-bit? */ + typedef SOPHIST_int32 SOPHIST_intptr; + typedef SOPHIST_uint32 SOPHIST_uintptr; + +#endif + +SOPHIST_compiletime_assert(intptr, sizeof(SOPHIST_intptr) == sizeof(char *)); + +/* enumerate known little endian cases; fallback to big-endian */ + +#define SOPHIST_little_endian 1 +#define SOPHIST_big_endian 2 + +#if defined(__386__) || defined(i386) || defined(__i386__) \ + || defined(__X86) || defined(_M_IX86) \ + || defined(_M_X64) || defined(__x86_64__) \ + || defined(alpha) || defined(__alpha) || defined(__alpha__) \ + || defined(_M_ALPHA) \ + || defined(ARM) || defined(_ARM) || defined(__arm__) \ + || defined(WIN32) || defined(_WIN32) || defined(__WIN32__) \ + || defined(_WIN32_WCE) || defined(__NT__) \ + || defined(__MIPSEL__) + #define SOPHIST_endian SOPHIST_little_endian +#else + #define SOPHIST_endian SOPHIST_big_endian +#endif + +#endif /* __INCLUDE_SOPHIST_H__ */ diff --git a/src/joomer-efsw-file-monitoring.cpp b/src/joomer-efsw-file-monitoring.cpp new file mode 100644 index 0000000..0cc57db --- /dev/null +++ b/src/joomer-efsw-file-monitoring.cpp @@ -0,0 +1,222 @@ +#define STB_IMAGE_IMPLEMENTATION +#define STB_IMAGE_WRITE_IMPLEMENTATION + +#include +#include +#include +#include +#include +#include +#include "stb_image.h" +#include "stb_image_write.h" + +//void flip_image_horizontally(unsigned char* data, int width, int height, int channels); +void flip_image_vertically(unsigned char* data, int width, int height, int channels); + +bool STOP = false; + +void sigend( int ) { + std::cout << std::endl << "Bye bye" << std::endl; + STOP = true; +} + +/// Processes a file action +class UpdateListener : public efsw::FileWatchListener { + public: + UpdateListener() {} + + std::string getActionName( efsw::Action action ) { + switch ( action ) { + case efsw::Actions::Add: + + return "Add"; + case efsw::Actions::Modified: + return "Modified"; + case efsw::Actions::Delete: + return "Delete"; + case efsw::Actions::Moved: + return "Moved"; + default: + return "Bad Action"; + } + } + + void handleFileAction( efsw::WatchID watchid, const std::string& dir, + const std::string& filename, efsw::Action action, + std::string oldFilename = "" ) override { + std::cout << "Watch ID " << watchid << " DIR (" + << dir + ") FILE (" + + ( oldFilename.empty() ? "" : "from file " + oldFilename + " to " ) + + filename + ") has event " + << getActionName( action ) << std::endl; + + // Check if a file was added (dropped) + /*if (action == efsw::Actions::Add) { + int width, height, channels; + // Reconstruct the full path + std::string fullPath = dir + filename; + + // Add this delay + efsw::System::sleep(500); + + std::cout << "File dropped: " << filename << std::endl; + std::cout << "Full path: " << fullPath << std::endl; + unsigned char* image_data = stbi_load(fullPath.c_str(), &width, &height, &channels, 0); + if (image_data) + { + std::cout << "DEBUG: Image loaded successfully. Flipping..." << std::endl; + flip_image_vertically(image_data, width, height, channels); + // --- Save the flipped image to a new temporary file --- + std::string flipped_filename = "flipped_" + filename; + stbi_write_jpg(flipped_filename.c_str(), width, height, channels, image_data, 100); // Quality 100 + stbi_image_free(image_data); + + STOP = true; + } + else + { + // This will tell you if the path was wrong or the file was locked + std::cout << "DEBUG: stbi_load failed for: " << fullPath << std::endl; + std::cout << "Reason: " << stbi_failure_reason() << std::endl; + } + }*/ + if (action == efsw::Actions::Add || action == efsw::Actions::Modified) { + // 1. Ignore the event if it's a file WE created + if (filename.find("flipped_") == 0) { + return; + } + + std::string fullPath = dir + filename; + + int width, height, channels; + // Try to load + unsigned char* image_data = stbi_load(fullPath.c_str(), &width, &height, &channels, 0); + + // If it fails because the file is still being written, wait and try one more time + if (!image_data) { + efsw::System::sleep(300); + image_data = stbi_load(fullPath.c_str(), &width, &height, &channels, 0); + } + + if (image_data) { + std::cout << "Successfully loaded " << filename << " (" << width << "x" << height << ")" << std::endl; + flip_image_vertically(image_data, width, height, channels); + std::string flipped_filename = dir + "flipped_" + filename; + stbi_write_jpg(flipped_filename.c_str(), width, height, channels, image_data, 100); + stbi_image_free(image_data); + STOP = true; + } + } + } +}; + +efsw::WatchID handleWatchID( efsw::WatchID watchid ) { + switch ( watchid ) { + case efsw::Errors::FileNotFound: + case efsw::Errors::FileRepeated: + case efsw::Errors::FileOutOfScope: + case efsw::Errors::FileRemote: + case efsw::Errors::WatcherFailed: + case efsw::Errors::Unspecified: { + std::cout << efsw::Errors::Log::getLastErrorLog().c_str() << std::endl; + break; + } + default: { + std::cout << "Added WatchID: " << watchid << std::endl; + } + } + + return watchid; +} + +void flip_image_vertically(unsigned char* data, int width, int height, int channels) { + // ... (your vertical flip implementation from before) + int row_stride = width * channels; + unsigned char* temp_row = new unsigned char [row_stride]; + for (int y = 0; y < height / 2; ++y) { + unsigned char* top_row = data + y * row_stride; + unsigned char* bottom_row = data + (height - 1 - y) * row_stride; + std::memcpy(temp_row, top_row, row_stride); + std::memcpy(top_row, bottom_row, row_stride); + std::memcpy(bottom_row, temp_row, row_stride); + } + delete[] temp_row; +} + +int main( int argc, char** argv ) { + signal( SIGABRT, sigend ); + signal( SIGINT, sigend ); + signal( SIGTERM, sigend ); + + std::cout << "Press ^C to exit demo" << std::endl; + + bool commonTest = true; + bool useGeneric = false; + std::string path; + + if ( argc >= 2 ) { + path = std::string( argv[1] ); + + if ( efsw::FileSystem::isDirectory( path ) ) { + commonTest = false; + } + + if ( argc >= 3 ) { + if ( std::string( argv[2] ) == "true" ) { + useGeneric = true; + } + } + } + + UpdateListener* ul = new UpdateListener(); + + /// create the file watcher object + efsw::FileWatcher fileWatcher( useGeneric ); + + fileWatcher.followSymlinks( false ); + fileWatcher.allowOutOfScopeLinks( false ); + + if ( commonTest ) { + std::string CurPath( efsw::System::getProcessPath() ); + + std::cout << "CurPath: " << CurPath.c_str() << std::endl; + + /// starts watching + fileWatcher.watch(); + + /// add a watch to the system + handleWatchID( fileWatcher.addWatch( CurPath + "test", ul, true ) ); + + /// adds another watch after started watching... + efsw::System::sleep( 100 ); + + efsw::WatchID watchID = + handleWatchID( fileWatcher.addWatch( CurPath + "test2", ul, true ) ); + + /// delete the watch + if ( watchID > 0 ) { + efsw::System::sleep( 1000 ); + fileWatcher.removeWatch( watchID ); + } + } else { + if ( fileWatcher.addWatch( path, ul, true ) > 0 ) { + fileWatcher.watch(); + + std::cout << "Watching directory: " << path.c_str() << std::endl; + + if ( useGeneric ) { + std::cout << "Using generic backend watcher" << std::endl; + } + } else { + std::cout << "Error trying to watch directory: " << path.c_str() << std::endl; + std::cout << efsw::Errors::Log::getLastErrorLog().c_str() << std::endl; + } + } + + while ( !STOP ) { + efsw::System::sleep( 100 ); + } + + return 0; +} + diff --git a/src/stb_image.h b/src/stb_image.h new file mode 100644 index 0000000..9eedabe --- /dev/null +++ b/src/stb_image.h @@ -0,0 +1,7988 @@ +/* stb_image - v2.30 - public domain image loader - http://nothings.org/stb + no warranty implied; use at your own risk + + Do this: + #define STB_IMAGE_IMPLEMENTATION + before you include this file in *one* C or C++ file to create the implementation. + + // i.e. it should look like this: + #include ... + #include ... + #include ... + #define STB_IMAGE_IMPLEMENTATION + #include "stb_image.h" + + You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. + And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free + + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) + PNG 1/2/4/8/16-bit-per-channel + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE + PSD (composited view only, no extra channels, 8/16 bit-per-channel) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + PNM (PPM and PGM binary only) + + Animated GIF still needs a proper API, but here's one way to do it: + http://gist.github.com/urraka/685d9a6340b26b830d49 + + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) + + Full documentation under "DOCUMENTATION" below. + + +LICENSE + + See end of file for license information. + +RECENT REVISION HISTORY: + + 2.30 (2024-05-31) avoid erroneous gcc warning + 2.29 (2023-05-xx) optimizations + 2.28 (2023-01-29) many error fixes, security errors, just tons of stuff + 2.27 (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes + 2.26 (2020-07-13) many minor fixes + 2.25 (2020-02-02) fix warnings + 2.24 (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically + 2.23 (2019-08-11) fix clang static analysis warning + 2.22 (2019-03-04) gif fixes, fix warnings + 2.21 (2019-02-25) fix typo in comment + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings + 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes + 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 + RGB-format JPEG; remove white matting in PSD; + allocate large structures on the stack; + correct channel count for PNG & BMP + 2.10 (2016-01-22) avoid warning introduced in 2.09 + 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED + + See end of file for full revision history. + + + ============================ Contributors ========================= + + Image formats Extensions, features + Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) + Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) + Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) + Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) + Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) + Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) + Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) + github:urraka (animated gif) Junggon Kim (PNM comments) + Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) + socks-the-fox (16-bit PNG) + Jeremy Sawicki (handle all ImageNet JPGs) + Optimizations & bugfixes Mikhail Morozov (1-bit BMP) + Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) + Arseny Kapoulkine Simon Breuss (16-bit PNM) + John-Mark Allen + Carmelo J Fdez-Aguera + + Bug & warning fixes + Marc LeBlanc David Woo Guillaume George Martins Mozeiko + Christpher Lloyd Jerry Jansson Joseph Thomson Blazej Dariusz Roszkowski + Phil Jordan Dave Moore Roy Eltham + Hayaki Saito Nathan Reed Won Chun + Luke Graham Johan Duparc Nick Verigakis the Horde3D community + Thomas Ruf Ronny Chevalier github:rlyeh + Janez Zemva John Bartholomew Michal Cichon github:romigrou + Jonathan Blow Ken Hamada Tero Hanninen github:svdijk + Eugene Golushkov Laurent Gomila Cort Stratton github:snagar + Aruelien Pocheville Sergio Gonzalez Thibault Reuille github:Zelex + Cass Everitt Ryamond Barbiero github:grim210 + Paul Du Bois Engin Manap Aldo Culquicondor github:sammyhw + Philipp Wiesemann Dale Weiler Oriol Ferrer Mesia github:phprus + Josh Tobin Neil Bickford Matthew Gregan github:poppolopoppo + Julian Raschke Gregory Mullen Christian Floisand github:darealshinji + Baldur Karlsson Kevin Schmidt JR Smith github:Michaelangel007 + Brad Weinberger Matvey Cherevko github:mosra + Luca Sas Alexander Veselov Zack Middleton [reserved] + Ryan C. Gordon [reserved] [reserved] + DO NOT ADD YOUR NAME HERE + + Jacko Dirks + + To add your name to the credits, pick a random blank space in the middle and fill it. + 80% of merge conflicts on stb PRs are due to people adding their name at the end + of the credits. +*/ + +#ifndef STBI_INCLUDE_STB_IMAGE_H +#define STBI_INCLUDE_STB_IMAGE_H + +// DOCUMENTATION +// +// Limitations: +// - no 12-bit-per-channel JPEG +// - no JPEGs with arithmetic coding +// - GIF always returns *comp=4 +// +// Basic usage (see HDR discussion below for HDR usage): +// int x,y,n; +// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); +// // ... process data if not NULL ... +// // ... x = width, y = height, n = # 8-bit components per pixel ... +// // ... replace '0' with '1'..'4' to force that many components per pixel +// // ... but 'n' will always be the number that it would have been if you said 0 +// stbi_image_free(data); +// +// Standard parameters: +// int *x -- outputs image width in pixels +// int *y -- outputs image height in pixels +// int *channels_in_file -- outputs # of image components in image file +// int desired_channels -- if non-zero, # of image components requested in result +// +// The return value from an image loader is an 'unsigned char *' which points +// to the pixel data, or NULL on an allocation failure or if the image is +// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, +// with each pixel consisting of N interleaved 8-bit components; the first +// pixel pointed to is top-left-most in the image. There is no padding between +// image scanlines or between pixels, regardless of format. The number of +// components N is 'desired_channels' if desired_channels is non-zero, or +// *channels_in_file otherwise. If desired_channels is non-zero, +// *channels_in_file has the number of components that _would_ have been +// output otherwise. E.g. if you set desired_channels to 4, you will always +// get RGBA output, but you can check *channels_in_file to see if it's trivially +// opaque because e.g. there were only 3 channels in the source image. +// +// An output image with N components has the following components interleaved +// in this order in each pixel: +// +// N=#comp components +// 1 grey +// 2 grey, alpha +// 3 red, green, blue +// 4 red, green, blue, alpha +// +// If image loading fails for any reason, the return value will be NULL, +// and *x, *y, *channels_in_file will be unchanged. The function +// stbi_failure_reason() can be queried for an extremely brief, end-user +// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS +// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly +// more user-friendly ones. +// +// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. +// +// To query the width, height and component count of an image without having to +// decode the full file, you can use the stbi_info family of functions: +// +// int x,y,n,ok; +// ok = stbi_info(filename, &x, &y, &n); +// // returns ok=1 and sets x, y, n if image is a supported format, +// // 0 otherwise. +// +// Note that stb_image pervasively uses ints in its public API for sizes, +// including sizes of memory buffers. This is now part of the API and thus +// hard to change without causing breakage. As a result, the various image +// loaders all have certain limits on image size; these differ somewhat +// by format but generally boil down to either just under 2GB or just under +// 1GB. When the decoded image would be larger than this, stb_image decoding +// will fail. +// +// Additionally, stb_image will reject image files that have any of their +// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS, +// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit, +// the only way to have an image with such dimensions load correctly +// is for it to have a rather extreme aspect ratio. Either way, the +// assumption here is that such larger images are likely to be malformed +// or malicious. If you do need to load an image with individual dimensions +// larger than that, and it still fits in the overall size limit, you can +// #define STBI_MAX_DIMENSIONS on your own to be something larger. +// +// =========================================================================== +// +// UNICODE: +// +// If compiling for Windows and you wish to use Unicode filenames, compile +// with +// #define STBI_WINDOWS_UTF8 +// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert +// Windows wchar_t filenames to utf8. +// +// =========================================================================== +// +// Philosophy +// +// stb libraries are designed with the following priorities: +// +// 1. easy to use +// 2. easy to maintain +// 3. good performance +// +// Sometimes I let "good performance" creep up in priority over "easy to maintain", +// and for best performance I may provide less-easy-to-use APIs that give higher +// performance, in addition to the easy-to-use ones. Nevertheless, it's important +// to keep in mind that from the standpoint of you, a client of this library, +// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. +// +// Some secondary priorities arise directly from the first two, some of which +// provide more explicit reasons why performance can't be emphasized. +// +// - Portable ("ease of use") +// - Small source code footprint ("easy to maintain") +// - No dependencies ("ease of use") +// +// =========================================================================== +// +// I/O callbacks +// +// I/O callbacks allow you to read from arbitrary sources, like packaged +// files or some other source. Data read from callbacks are processed +// through a small internal buffer (currently 128 bytes) to try to reduce +// overhead. +// +// The three functions you must define are "read" (reads some bytes of data), +// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). +// +// =========================================================================== +// +// SIMD support +// +// The JPEG decoder will try to automatically use SIMD kernels on x86 when +// supported by the compiler. For ARM Neon support, you must explicitly +// request it. +// +// (The old do-it-yourself SIMD API is no longer supported in the current +// code.) +// +// On x86, SSE2 will automatically be used when available based on a run-time +// test; if not, the generic C versions are used as a fall-back. On ARM targets, +// the typical path is to have separate builds for NEON and non-NEON devices +// (at least this is true for iOS and Android). Therefore, the NEON support is +// toggled by a build flag: define STBI_NEON to get NEON loops. +// +// If for some reason you do not want to use any of SIMD code, or if +// you have issues compiling it, you can disable it entirely by +// defining STBI_NO_SIMD. +// +// =========================================================================== +// +// HDR image support (disable by defining STBI_NO_HDR) +// +// stb_image supports loading HDR images in general, and currently the Radiance +// .HDR file format specifically. You can still load any file through the existing +// interface; if you attempt to load an HDR file, it will be automatically remapped +// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; +// both of these constants can be reconfigured through this interface: +// +// stbi_hdr_to_ldr_gamma(2.2f); +// stbi_hdr_to_ldr_scale(1.0f); +// +// (note, do not use _inverse_ constants; stbi_image will invert them +// appropriately). +// +// Additionally, there is a new, parallel interface for loading files as +// (linear) floats to preserve the full dynamic range: +// +// float *data = stbi_loadf(filename, &x, &y, &n, 0); +// +// If you load LDR images through this interface, those images will +// be promoted to floating point values, run through the inverse of +// constants corresponding to the above: +// +// stbi_ldr_to_hdr_scale(1.0f); +// stbi_ldr_to_hdr_gamma(2.2f); +// +// Finally, given a filename (or an open file or memory block--see header +// file for details) containing image data, you can query for the "most +// appropriate" interface to use (that is, whether the image is HDR or +// not), using: +// +// stbi_is_hdr(char *filename); +// +// =========================================================================== +// +// iPhone PNG support: +// +// We optionally support converting iPhone-formatted PNGs (which store +// premultiplied BGRA) back to RGB, even though they're internally encoded +// differently. To enable this conversion, call +// stbi_convert_iphone_png_to_rgb(1). +// +// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per +// pixel to remove any premultiplied alpha *only* if the image file explicitly +// says there's premultiplied data (currently only happens in iPhone images, +// and only if iPhone convert-to-rgb processing is on). +// +// =========================================================================== +// +// ADDITIONAL CONFIGURATION +// +// - You can suppress implementation of any of the decoders to reduce +// your code footprint by #defining one or more of the following +// symbols before creating the implementation. +// +// STBI_NO_JPEG +// STBI_NO_PNG +// STBI_NO_BMP +// STBI_NO_PSD +// STBI_NO_TGA +// STBI_NO_GIF +// STBI_NO_HDR +// STBI_NO_PIC +// STBI_NO_PNM (.ppm and .pgm) +// +// - You can request *only* certain decoders and suppress all other ones +// (this will be more forward-compatible, as addition of new decoders +// doesn't require you to disable them explicitly): +// +// STBI_ONLY_JPEG +// STBI_ONLY_PNG +// STBI_ONLY_BMP +// STBI_ONLY_PSD +// STBI_ONLY_TGA +// STBI_ONLY_GIF +// STBI_ONLY_HDR +// STBI_ONLY_PIC +// STBI_ONLY_PNM (.ppm and .pgm) +// +// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still +// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB +// +// - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater +// than that size (in either width or height) without further processing. +// This is to let programs in the wild set an upper bound to prevent +// denial-of-service attacks on untrusted data, as one could generate a +// valid image of gigantic dimensions and force stb_image to allocate a +// huge block of memory and spend disproportionate time decoding it. By +// default this is set to (1 << 24), which is 16777216, but that's still +// very big. + +#ifndef STBI_NO_STDIO +#include +#endif // STBI_NO_STDIO + +#define STBI_VERSION 1 + +enum +{ + STBI_default = 0, // only used for desired_channels + + STBI_grey = 1, + STBI_grey_alpha = 2, + STBI_rgb = 3, + STBI_rgb_alpha = 4 +}; + +#include +typedef unsigned char stbi_uc; +typedef unsigned short stbi_us; + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef STBIDEF +#ifdef STB_IMAGE_STATIC +#define STBIDEF static +#else +#define STBIDEF extern +#endif +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// PRIMARY API - works on images of any type +// + +// +// load image by filename, open file, or memory buffer +// + +typedef struct +{ + int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read + void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative + int (*eof) (void *user); // returns nonzero if we are at end of file/data +} stbi_io_callbacks; + +//////////////////////////////////// +// +// 8-bits-per-channel interface +// + +STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); +// for stbi_load_from_file, file pointer is left pointing immediately after image +#endif + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp); +#endif + +#ifdef STBI_WINDOWS_UTF8 +STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); +#endif + +//////////////////////////////////// +// +// 16-bits-per-channel interface +// + +STBIDEF stbi_us *stbi_load_16_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_us *stbi_load_16 (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); +STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); +#endif + +//////////////////////////////////// +// +// float-per-channel interface +// +#ifndef STBI_NO_LINEAR + STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels); + STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels); + + #ifndef STBI_NO_STDIO + STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels); + STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels); + #endif +#endif + +#ifndef STBI_NO_HDR + STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); + STBIDEF void stbi_hdr_to_ldr_scale(float scale); +#endif // STBI_NO_HDR + +#ifndef STBI_NO_LINEAR + STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); + STBIDEF void stbi_ldr_to_hdr_scale(float scale); +#endif // STBI_NO_LINEAR + +// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr (char const *filename); +STBIDEF int stbi_is_hdr_from_file(FILE *f); +#endif // STBI_NO_STDIO + + +// get a VERY brief reason for failure +// on most compilers (and ALL modern mainstream compilers) this is threadsafe +STBIDEF const char *stbi_failure_reason (void); + +// free the loaded image -- this is just free() +STBIDEF void stbi_image_free (void *retval_from_stbi_load); + +// get image dimensions & components without fully decoding +STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len); +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user); + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp); +STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); +STBIDEF int stbi_is_16_bit (char const *filename); +STBIDEF int stbi_is_16_bit_from_file(FILE *f); +#endif + + + +// for image formats that explicitly notate that they have premultiplied alpha, +// we just return the colors as stored in the file. set this flag to force +// unpremultiplication. results are undefined if the unpremultiply overflow. +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); + +// indicate whether we should process iphone images back to canonical format, +// or just pass them through "as-is" +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); + +// flip the image vertically, so the first pixel in the output array is the bottom left +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); + +// as above, but only applies to images loaded on the thread that calls the function +// this function is only available if your compiler supports thread-local variables; +// calling it will fail to link if your compiler doesn't +STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply); +STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert); +STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip); + +// ZLIB client - used by PNG, available for other purposes + +STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen); +STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header); +STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen); +STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + +STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen); +STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + + +#ifdef __cplusplus +} +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // STBI_INCLUDE_STB_IMAGE_H + +#ifdef STB_IMAGE_IMPLEMENTATION + +#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ + || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ + || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ + || defined(STBI_ONLY_ZLIB) + #ifndef STBI_ONLY_JPEG + #define STBI_NO_JPEG + #endif + #ifndef STBI_ONLY_PNG + #define STBI_NO_PNG + #endif + #ifndef STBI_ONLY_BMP + #define STBI_NO_BMP + #endif + #ifndef STBI_ONLY_PSD + #define STBI_NO_PSD + #endif + #ifndef STBI_ONLY_TGA + #define STBI_NO_TGA + #endif + #ifndef STBI_ONLY_GIF + #define STBI_NO_GIF + #endif + #ifndef STBI_ONLY_HDR + #define STBI_NO_HDR + #endif + #ifndef STBI_ONLY_PIC + #define STBI_NO_PIC + #endif + #ifndef STBI_ONLY_PNM + #define STBI_NO_PNM + #endif +#endif + +#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) +#define STBI_NO_ZLIB +#endif + + +#include +#include // ptrdiff_t on osx +#include +#include +#include + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +#include // ldexp, pow +#endif + +#ifndef STBI_NO_STDIO +#include +#endif + +#ifndef STBI_ASSERT +#include +#define STBI_ASSERT(x) assert(x) +#endif + +#ifdef __cplusplus +#define STBI_EXTERN extern "C" +#else +#define STBI_EXTERN extern +#endif + + +#ifndef _MSC_VER + #ifdef __cplusplus + #define stbi_inline inline + #else + #define stbi_inline + #endif +#else + #define stbi_inline __forceinline +#endif + +#ifndef STBI_NO_THREAD_LOCALS + #if defined(__cplusplus) && __cplusplus >= 201103L + #define STBI_THREAD_LOCAL thread_local + #elif defined(__GNUC__) && __GNUC__ < 5 + #define STBI_THREAD_LOCAL __thread + #elif defined(_MSC_VER) + #define STBI_THREAD_LOCAL __declspec(thread) + #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__) + #define STBI_THREAD_LOCAL _Thread_local + #endif + + #ifndef STBI_THREAD_LOCAL + #if defined(__GNUC__) + #define STBI_THREAD_LOCAL __thread + #endif + #endif +#endif + +#if defined(_MSC_VER) || defined(__SYMBIAN32__) +typedef unsigned short stbi__uint16; +typedef signed short stbi__int16; +typedef unsigned int stbi__uint32; +typedef signed int stbi__int32; +#else +#include +typedef uint16_t stbi__uint16; +typedef int16_t stbi__int16; +typedef uint32_t stbi__uint32; +typedef int32_t stbi__int32; +#endif + +// should produce compiler error if size is wrong +typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; + +#ifdef _MSC_VER +#define STBI_NOTUSED(v) (void)(v) +#else +#define STBI_NOTUSED(v) (void)sizeof(v) +#endif + +#ifdef _MSC_VER +#define STBI_HAS_LROTL +#endif + +#ifdef STBI_HAS_LROTL + #define stbi_lrot(x,y) _lrotl(x,y) +#else + #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (-(y) & 31))) +#endif + +#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) +// ok +#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." +#endif + +#ifndef STBI_MALLOC +#define STBI_MALLOC(sz) malloc(sz) +#define STBI_REALLOC(p,newsz) realloc(p,newsz) +#define STBI_FREE(p) free(p) +#endif + +#ifndef STBI_REALLOC_SIZED +#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) +#endif + +// x86/x64 detection +#if defined(__x86_64__) || defined(_M_X64) +#define STBI__X64_TARGET +#elif defined(__i386) || defined(_M_IX86) +#define STBI__X86_TARGET +#endif + +#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) +// gcc doesn't support sse2 intrinsics unless you compile with -msse2, +// which in turn means it gets to use SSE2 everywhere. This is unfortunate, +// but previous attempts to provide the SSE2 functions with runtime +// detection caused numerous issues. The way architecture extensions are +// exposed in GCC/Clang is, sadly, not really suited for one-file libs. +// New behavior: if compiled with -msse2, we use SSE2 without any +// detection; if not, we don't use it at all. +#define STBI_NO_SIMD +#endif + +#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) +// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET +// +// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the +// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. +// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not +// simultaneously enabling "-mstackrealign". +// +// See https://github.com/nothings/stb/issues/81 for more information. +// +// So default to no SSE2 on 32-bit MinGW. If you've read this far and added +// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. +#define STBI_NO_SIMD +#endif + +#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) +#define STBI_SSE2 +#include + +#ifdef _MSC_VER + +#if _MSC_VER >= 1400 // not VC6 +#include // __cpuid +static int stbi__cpuid3(void) +{ + int info[4]; + __cpuid(info,1); + return info[3]; +} +#else +static int stbi__cpuid3(void) +{ + int res; + __asm { + mov eax,1 + cpuid + mov res,edx + } + return res; +} +#endif + +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) +{ + int info3 = stbi__cpuid3(); + return ((info3 >> 26) & 1) != 0; +} +#endif + +#else // assume GCC-style if not VC++ +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) + +#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2) +static int stbi__sse2_available(void) +{ + // If we're even attempting to compile this on GCC/Clang, that means + // -msse2 is on, which means the compiler is allowed to use SSE2 + // instructions at will, and so are we. + return 1; +} +#endif + +#endif +#endif + +// ARM NEON +#if defined(STBI_NO_SIMD) && defined(STBI_NEON) +#undef STBI_NEON +#endif + +#ifdef STBI_NEON +#include +#ifdef _MSC_VER +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name +#else +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) +#endif +#endif + +#ifndef STBI_SIMD_ALIGN +#define STBI_SIMD_ALIGN(type, name) type name +#endif + +#ifndef STBI_MAX_DIMENSIONS +#define STBI_MAX_DIMENSIONS (1 << 24) +#endif + +/////////////////////////////////////////////// +// +// stbi__context struct and start_xxx functions + +// stbi__context structure is our basic context used by all images, so it +// contains all the IO context, plus some basic image information +typedef struct +{ + stbi__uint32 img_x, img_y; + int img_n, img_out_n; + + stbi_io_callbacks io; + void *io_user_data; + + int read_from_callbacks; + int buflen; + stbi_uc buffer_start[128]; + int callback_already_read; + + stbi_uc *img_buffer, *img_buffer_end; + stbi_uc *img_buffer_original, *img_buffer_original_end; +} stbi__context; + + +static void stbi__refill_buffer(stbi__context *s); + +// initialize a memory-decode context +static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len) +{ + s->io.read = NULL; + s->read_from_callbacks = 0; + s->callback_already_read = 0; + s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer; + s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len; +} + +// initialize a callback-based context +static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user) +{ + s->io = *c; + s->io_user_data = user; + s->buflen = sizeof(s->buffer_start); + s->read_from_callbacks = 1; + s->callback_already_read = 0; + s->img_buffer = s->img_buffer_original = s->buffer_start; + stbi__refill_buffer(s); + s->img_buffer_original_end = s->img_buffer_end; +} + +#ifndef STBI_NO_STDIO + +static int stbi__stdio_read(void *user, char *data, int size) +{ + return (int) fread(data,1,size,(FILE*) user); +} + +static void stbi__stdio_skip(void *user, int n) +{ + int ch; + fseek((FILE*) user, n, SEEK_CUR); + ch = fgetc((FILE*) user); /* have to read a byte to reset feof()'s flag */ + if (ch != EOF) { + ungetc(ch, (FILE *) user); /* push byte back onto stream if valid. */ + } +} + +static int stbi__stdio_eof(void *user) +{ + return feof((FILE*) user) || ferror((FILE *) user); +} + +static stbi_io_callbacks stbi__stdio_callbacks = +{ + stbi__stdio_read, + stbi__stdio_skip, + stbi__stdio_eof, +}; + +static void stbi__start_file(stbi__context *s, FILE *f) +{ + stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f); +} + +//static void stop_file(stbi__context *s) { } + +#endif // !STBI_NO_STDIO + +static void stbi__rewind(stbi__context *s) +{ + // conceptually rewind SHOULD rewind to the beginning of the stream, + // but we just rewind to the beginning of the initial buffer, because + // we only use it after doing 'test', which only ever looks at at most 92 bytes + s->img_buffer = s->img_buffer_original; + s->img_buffer_end = s->img_buffer_original_end; +} + +enum +{ + STBI_ORDER_RGB, + STBI_ORDER_BGR +}; + +typedef struct +{ + int bits_per_channel; + int num_channels; + int channel_order; +} stbi__result_info; + +#ifndef STBI_NO_JPEG +static int stbi__jpeg_test(stbi__context *s); +static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PNG +static int stbi__png_test(stbi__context *s); +static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp); +static int stbi__png_is16(stbi__context *s); +#endif + +#ifndef STBI_NO_BMP +static int stbi__bmp_test(stbi__context *s); +static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_TGA +static int stbi__tga_test(stbi__context *s); +static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context *s); +static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc); +static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp); +static int stbi__psd_is16(stbi__context *s); +#endif + +#ifndef STBI_NO_HDR +static int stbi__hdr_test(stbi__context *s); +static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_test(stbi__context *s); +static void *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_GIF +static int stbi__gif_test(stbi__context *s); +static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp); +static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PNM +static int stbi__pnm_test(stbi__context *s); +static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri); +static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp); +static int stbi__pnm_is16(stbi__context *s); +#endif + +static +#ifdef STBI_THREAD_LOCAL +STBI_THREAD_LOCAL +#endif +const char *stbi__g_failure_reason; + +STBIDEF const char *stbi_failure_reason(void) +{ + return stbi__g_failure_reason; +} + +#ifndef STBI_NO_FAILURE_STRINGS +static int stbi__err(const char *str) +{ + stbi__g_failure_reason = str; + return 0; +} +#endif + +static void *stbi__malloc(size_t size) +{ + return STBI_MALLOC(size); +} + +// stb_image uses ints pervasively, including for offset calculations. +// therefore the largest decoded image size we can support with the +// current code, even on 64-bit targets, is INT_MAX. this is not a +// significant limitation for the intended use case. +// +// we do, however, need to make sure our size calculations don't +// overflow. hence a few helper functions for size calculations that +// multiply integers together, making sure that they're non-negative +// and no overflow occurs. + +// return 1 if the sum is valid, 0 on overflow. +// negative terms are considered invalid. +static int stbi__addsizes_valid(int a, int b) +{ + if (b < 0) return 0; + // now 0 <= b <= INT_MAX, hence also + // 0 <= INT_MAX - b <= INTMAX. + // And "a + b <= INT_MAX" (which might overflow) is the + // same as a <= INT_MAX - b (no overflow) + return a <= INT_MAX - b; +} + +// returns 1 if the product is valid, 0 on overflow. +// negative factors are considered invalid. +static int stbi__mul2sizes_valid(int a, int b) +{ + if (a < 0 || b < 0) return 0; + if (b == 0) return 1; // mul-by-0 is always safe + // portable way to check for no overflows in a*b + return a <= INT_MAX/b; +} + +#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) +// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow +static int stbi__mad2sizes_valid(int a, int b, int add) +{ + return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add); +} +#endif + +// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow +static int stbi__mad3sizes_valid(int a, int b, int c, int add) +{ + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && + stbi__addsizes_valid(a*b*c, add); +} + +// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) +static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) +{ + return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) && + stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add); +} +#endif + +#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR) +// mallocs with size overflow checking +static void *stbi__malloc_mad2(int a, int b, int add) +{ + if (!stbi__mad2sizes_valid(a, b, add)) return NULL; + return stbi__malloc(a*b + add); +} +#endif + +static void *stbi__malloc_mad3(int a, int b, int c, int add) +{ + if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL; + return stbi__malloc(a*b*c + add); +} + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM) +static void *stbi__malloc_mad4(int a, int b, int c, int d, int add) +{ + if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; + return stbi__malloc(a*b*c*d + add); +} +#endif + +// returns 1 if the sum of two signed ints is valid (between -2^31 and 2^31-1 inclusive), 0 on overflow. +static int stbi__addints_valid(int a, int b) +{ + if ((a >= 0) != (b >= 0)) return 1; // a and b have different signs, so no overflow + if (a < 0 && b < 0) return a >= INT_MIN - b; // same as a + b >= INT_MIN; INT_MIN - b cannot overflow since b < 0. + return a <= INT_MAX - b; +} + +// returns 1 if the product of two ints fits in a signed short, 0 on overflow. +static int stbi__mul2shorts_valid(int a, int b) +{ + if (b == 0 || b == -1) return 1; // multiplication by 0 is always 0; check for -1 so SHRT_MIN/b doesn't overflow + if ((a >= 0) == (b >= 0)) return a <= SHRT_MAX/b; // product is positive, so similar to mul2sizes_valid + if (b < 0) return a <= SHRT_MIN / b; // same as a * b >= SHRT_MIN + return a >= SHRT_MIN / b; +} + +// stbi__err - error +// stbi__errpf - error returning pointer to float +// stbi__errpuc - error returning pointer to unsigned char + +#ifdef STBI_NO_FAILURE_STRINGS + #define stbi__err(x,y) 0 +#elif defined(STBI_FAILURE_USERMSG) + #define stbi__err(x,y) stbi__err(y) +#else + #define stbi__err(x,y) stbi__err(x) +#endif + +#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) +#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) + +STBIDEF void stbi_image_free(void *retval_from_stbi_load) +{ + STBI_FREE(retval_from_stbi_load); +} + +#ifndef STBI_NO_LINEAR +static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp); +#endif + +#ifndef STBI_NO_HDR +static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp); +#endif + +static int stbi__vertically_flip_on_load_global = 0; + +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) +{ + stbi__vertically_flip_on_load_global = flag_true_if_should_flip; +} + +#ifndef STBI_THREAD_LOCAL +#define stbi__vertically_flip_on_load stbi__vertically_flip_on_load_global +#else +static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set; + +STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip) +{ + stbi__vertically_flip_on_load_local = flag_true_if_should_flip; + stbi__vertically_flip_on_load_set = 1; +} + +#define stbi__vertically_flip_on_load (stbi__vertically_flip_on_load_set \ + ? stbi__vertically_flip_on_load_local \ + : stbi__vertically_flip_on_load_global) +#endif // STBI_THREAD_LOCAL + +static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) +{ + memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields + ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed + ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order + ri->num_channels = 0; + + // test the formats with a very explicit header first (at least a FOURCC + // or distinctive magic number first) + #ifndef STBI_NO_PNG + if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_BMP + if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_GIF + if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PSD + if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc); + #else + STBI_NOTUSED(bpc); + #endif + #ifndef STBI_NO_PIC + if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri); + #endif + + // then the formats that can end up attempting to load with just 1 or 2 + // bytes matching expectations; these are prone to false positives, so + // try them later + #ifndef STBI_NO_JPEG + if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri); + #endif + #ifndef STBI_NO_PNM + if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri); + #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri); + return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif + + #ifndef STBI_NO_TGA + // test tga last because it's a crappy test! + if (stbi__tga_test(s)) + return stbi__tga_load(s,x,y,comp,req_comp, ri); + #endif + + return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); +} + +static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels) +{ + int i; + int img_len = w * h * channels; + stbi_uc *reduced; + + reduced = (stbi_uc *) stbi__malloc(img_len); + if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling + + STBI_FREE(orig); + return reduced; +} + +static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels) +{ + int i; + int img_len = w * h * channels; + stbi__uint16 *enlarged; + + enlarged = (stbi__uint16 *) stbi__malloc(img_len*2); + if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); + + for (i = 0; i < img_len; ++i) + enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff + + STBI_FREE(orig); + return enlarged; +} + +static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel) +{ + int row; + size_t bytes_per_row = (size_t)w * bytes_per_pixel; + stbi_uc temp[2048]; + stbi_uc *bytes = (stbi_uc *)image; + + for (row = 0; row < (h>>1); row++) { + stbi_uc *row0 = bytes + row*bytes_per_row; + stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row; + // swap row0 with row1 + size_t bytes_left = bytes_per_row; + while (bytes_left) { + size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); + memcpy(temp, row0, bytes_copy); + memcpy(row0, row1, bytes_copy); + memcpy(row1, temp, bytes_copy); + row0 += bytes_copy; + row1 += bytes_copy; + bytes_left -= bytes_copy; + } + } +} + +#ifndef STBI_NO_GIF +static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel) +{ + int slice; + int slice_size = w * h * bytes_per_pixel; + + stbi_uc *bytes = (stbi_uc *)image; + for (slice = 0; slice < z; ++slice) { + stbi__vertical_flip(bytes, w, h, bytes_per_pixel); + bytes += slice_size; + } +} +#endif + +static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi__result_info ri; + void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); + + if (result == NULL) + return NULL; + + // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. + STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); + + if (ri.bits_per_channel != 8) { + result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 8; + } + + // @TODO: move stbi__convert_format to here + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); + } + + return (unsigned char *) result; +} + +static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi__result_info ri; + void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); + + if (result == NULL) + return NULL; + + // it is the responsibility of the loaders to make sure we get either 8 or 16 bit. + STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16); + + if (ri.bits_per_channel != 16) { + result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp); + ri.bits_per_channel = 16; + } + + // @TODO: move stbi__convert_format16 to here + // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision + + if (stbi__vertically_flip_on_load) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); + } + + return (stbi__uint16 *) result; +} + +#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR) +static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp) +{ + if (stbi__vertically_flip_on_load && result != NULL) { + int channels = req_comp ? req_comp : *comp; + stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); + } +} +#endif + +#ifndef STBI_NO_STDIO + +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) +STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); +STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); +#endif + +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) +STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) +{ + return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL); +} +#endif + +static FILE *stbi__fopen(char const *filename, char const *mode) +{ + FILE *f; +#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename))) + return 0; + + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode))) + return 0; + +#if defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != _wfopen_s(&f, wFilename, wMode)) + f = 0; +#else + f = _wfopen(wFilename, wMode); +#endif + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != fopen_s(&f, filename, mode)) + f=0; +#else + f = fopen(filename, mode); +#endif + return f; +} + + +STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + unsigned char *result; + if (!f) return stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *result; + stbi__context s; + stbi__start_file(&s,f); + result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi__uint16 *result; + stbi__context s; + stbi__start_file(&s,f); + result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} + +STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + stbi__uint16 *result; + if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file_16(f,x,y,comp,req_comp); + fclose(f); + return result; +} + + +#endif //!STBI_NO_STDIO + +STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); +} + +STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user); + return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels); +} + +STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); +} + +STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_GIF +STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp) +{ + unsigned char *result; + stbi__context s; + stbi__start_mem(&s,buffer,len); + + result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); + if (stbi__vertically_flip_on_load) { + stbi__vertical_flip_slices( result, *x, *y, *z, *comp ); + } + + return result; +} +#endif + +#ifndef STBI_NO_LINEAR +static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + stbi__result_info ri; + float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri); + if (hdr_data) + stbi__float_postprocess(hdr_data,x,y,comp,req_comp); + return hdr_data; + } + #endif + data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); + if (data) + return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); +} + +STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} + +STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_STDIO +STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + float *result; + FILE *f = stbi__fopen(filename, "rb"); + if (!f) return stbi__errpf("can't fopen", "Unable to open file"); + result = stbi_loadf_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_file(&s,f); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} +#endif // !STBI_NO_STDIO + +#endif // !STBI_NO_LINEAR + +// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is +// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always +// reports false! + +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) +{ + #ifndef STBI_NO_HDR + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__hdr_test(&s); + #else + STBI_NOTUSED(buffer); + STBI_NOTUSED(len); + return 0; + #endif +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr (char const *filename) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result=0; + if (f) { + result = stbi_is_hdr_from_file(f); + fclose(f); + } + return result; +} + +STBIDEF int stbi_is_hdr_from_file(FILE *f) +{ + #ifndef STBI_NO_HDR + long pos = ftell(f); + int res; + stbi__context s; + stbi__start_file(&s,f); + res = stbi__hdr_test(&s); + fseek(f, pos, SEEK_SET); + return res; + #else + STBI_NOTUSED(f); + return 0; + #endif +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user) +{ + #ifndef STBI_NO_HDR + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__hdr_test(&s); + #else + STBI_NOTUSED(clbk); + STBI_NOTUSED(user); + return 0; + #endif +} + +#ifndef STBI_NO_LINEAR +static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f; + +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } +STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } +#endif + +static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f; + +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; } +STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; } + + +////////////////////////////////////////////////////////////////////////////// +// +// Common code used by all image loaders +// + +enum +{ + STBI__SCAN_load=0, + STBI__SCAN_type, + STBI__SCAN_header +}; + +static void stbi__refill_buffer(stbi__context *s) +{ + int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen); + s->callback_already_read += (int) (s->img_buffer - s->img_buffer_original); + if (n == 0) { + // at end of file, treat same as if from memory, but need to handle case + // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file + s->read_from_callbacks = 0; + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start+1; + *s->img_buffer = 0; + } else { + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + n; + } +} + +stbi_inline static stbi_uc stbi__get8(stbi__context *s) +{ + if (s->img_buffer < s->img_buffer_end) + return *s->img_buffer++; + if (s->read_from_callbacks) { + stbi__refill_buffer(s); + return *s->img_buffer++; + } + return 0; +} + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +stbi_inline static int stbi__at_eof(stbi__context *s) +{ + if (s->io.read) { + if (!(s->io.eof)(s->io_user_data)) return 0; + // if feof() is true, check if buffer = end + // special case: we've only got the special 0 character at the end + if (s->read_from_callbacks == 0) return 1; + } + + return s->img_buffer >= s->img_buffer_end; +} +#endif + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) +// nothing +#else +static void stbi__skip(stbi__context *s, int n) +{ + if (n == 0) return; // already there! + if (n < 0) { + s->img_buffer = s->img_buffer_end; + return; + } + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + s->img_buffer = s->img_buffer_end; + (s->io.skip)(s->io_user_data, n - blen); + return; + } + } + s->img_buffer += n; +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM) +// nothing +#else +static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n) +{ + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + int res, count; + + memcpy(buffer, s->img_buffer, blen); + + count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen); + res = (count == (n-blen)); + s->img_buffer = s->img_buffer_end; + return res; + } + } + + if (s->img_buffer+n <= s->img_buffer_end) { + memcpy(buffer, s->img_buffer, n); + s->img_buffer += n; + return 1; + } else + return 0; +} +#endif + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) +// nothing +#else +static int stbi__get16be(stbi__context *s) +{ + int z = stbi__get8(s); + return (z << 8) + stbi__get8(s); +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC) +// nothing +#else +static stbi__uint32 stbi__get32be(stbi__context *s) +{ + stbi__uint32 z = stbi__get16be(s); + return (z << 16) + stbi__get16be(s); +} +#endif + +#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) +// nothing +#else +static int stbi__get16le(stbi__context *s) +{ + int z = stbi__get8(s); + return z + (stbi__get8(s) << 8); +} +#endif + +#ifndef STBI_NO_BMP +static stbi__uint32 stbi__get32le(stbi__context *s) +{ + stbi__uint32 z = stbi__get16le(s); + z += (stbi__uint32)stbi__get16le(s) << 16; + return z; +} +#endif + +#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings + +#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +////////////////////////////////////////////////////////////////////////////// +// +// generic converter from built-in img_n to req_comp +// individual types do this automatically as much as possible (e.g. jpeg +// does all cases internally since it needs to colorspace convert anyway, +// and it never has alpha, so very few cases ). png can automatically +// interleave an alpha=255 channel, but falls back to this for other cases +// +// assume data buffer is malloced, so malloc a new one and free that one +// only failure mode is malloc failing + +static stbi_uc stbi__compute_y(int r, int g, int b) +{ + return (stbi_uc) (((r*77) + (g*150) + (29*b)) >> 8); +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM) +// nothing +#else +static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y) +{ + int i,j; + unsigned char *good; + + if (req_comp == img_n) return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0); + if (good == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); + } + + for (j=0; j < (int) y; ++j) { + unsigned char *src = data + j * x * img_n ; + unsigned char *dest = good + j * x * req_comp; + + #define STBI__COMBO(a,b) ((a)*8+(b)) + #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255; } break; + STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255; } break; + STBI__CASE(2,1) { dest[0]=src[0]; } break; + STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; + STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255; } break; + STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; + STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255; } break; + STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break; + STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break; + STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; + default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return stbi__errpuc("unsupported", "Unsupported format conversion"); + } + #undef STBI__CASE + } + + STBI_FREE(data); + return good; +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) +// nothing +#else +static stbi__uint16 stbi__compute_y_16(int r, int g, int b) +{ + return (stbi__uint16) (((r*77) + (g*150) + (29*b)) >> 8); +} +#endif + +#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) +// nothing +#else +static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y) +{ + int i,j; + stbi__uint16 *good; + + if (req_comp == img_n) return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2); + if (good == NULL) { + STBI_FREE(data); + return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory"); + } + + for (j=0; j < (int) y; ++j) { + stbi__uint16 *src = data + j * x * img_n ; + stbi__uint16 *dest = good + j * x * req_comp; + + #define STBI__COMBO(a,b) ((a)*8+(b)) + #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (STBI__COMBO(img_n, req_comp)) { + STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff; } break; + STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff; } break; + STBI__CASE(2,1) { dest[0]=src[0]; } break; + STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break; + STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break; + STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff; } break; + STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; + STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break; + STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break; + STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break; + STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break; + default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion"); + } + #undef STBI__CASE + } + + STBI_FREE(data); + return good; +} +#endif + +#ifndef STBI_NO_LINEAR +static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp) +{ + int i,k,n; + float *output; + if (!data) return NULL; + output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0); + if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale); + } + } + if (n < comp) { + for (i=0; i < x*y; ++i) { + output[i*comp + n] = data[i*comp + n]/255.0f; + } + } + STBI_FREE(data); + return output; +} +#endif + +#ifndef STBI_NO_HDR +#define stbi__float2int(x) ((int) (x)) +static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp) +{ + int i,k,n; + stbi_uc *output; + if (!data) return NULL; + output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0); + if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi_uc) stbi__float2int(z); + } + if (k < comp) { + float z = data[i*comp+k] * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi_uc) stbi__float2int(z); + } + } + STBI_FREE(data); + return output; +} +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// "baseline" JPEG/JFIF decoder +// +// simple implementation +// - doesn't support delayed output of y-dimension +// - simple interface (only one output format: 8-bit interleaved RGB) +// - doesn't try to recover corrupt jpegs +// - doesn't allow partial loading, loading multiple at once +// - still fast on x86 (copying globals into locals doesn't help x86) +// - allocates lots of intermediate memory (full size of all components) +// - non-interleaved case requires this anyway +// - allows good upsampling (see next) +// high-quality +// - upsampled channels are bilinearly interpolated, even across blocks +// - quality integer IDCT derived from IJG's 'slow' +// performance +// - fast huffman; reasonable integer IDCT +// - some SIMD kernels for common paths on targets with SSE2/NEON +// - uses a lot of intermediate memory, could cache poorly + +#ifndef STBI_NO_JPEG + +// huffman decoding acceleration +#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache + +typedef struct +{ + stbi_uc fast[1 << FAST_BITS]; + // weirdly, repacking this into AoS is a 10% speed loss, instead of a win + stbi__uint16 code[256]; + stbi_uc values[256]; + stbi_uc size[257]; + unsigned int maxcode[18]; + int delta[17]; // old 'firstsymbol' - old 'firstcode' +} stbi__huffman; + +typedef struct +{ + stbi__context *s; + stbi__huffman huff_dc[4]; + stbi__huffman huff_ac[4]; + stbi__uint16 dequant[4][64]; + stbi__int16 fast_ac[4][1 << FAST_BITS]; + +// sizes for components, interleaved MCUs + int img_h_max, img_v_max; + int img_mcu_x, img_mcu_y; + int img_mcu_w, img_mcu_h; + +// definition of jpeg image component + struct + { + int id; + int h,v; + int tq; + int hd,ha; + int dc_pred; + + int x,y,w2,h2; + stbi_uc *data; + void *raw_data, *raw_coeff; + stbi_uc *linebuf; + short *coeff; // progressive only + int coeff_w, coeff_h; // number of 8x8 coefficient blocks + } img_comp[4]; + + stbi__uint32 code_buffer; // jpeg entropy-coded buffer + int code_bits; // number of valid bits + unsigned char marker; // marker seen while filling entropy buffer + int nomore; // flag if we saw a marker so must stop + + int progressive; + int spec_start; + int spec_end; + int succ_high; + int succ_low; + int eob_run; + int jfif; + int app14_color_transform; // Adobe APP14 tag + int rgb; + + int scan_n, order[4]; + int restart_interval, todo; + +// kernels + void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]); + void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step); + stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs); +} stbi__jpeg; + +static int stbi__build_huffman(stbi__huffman *h, int *count) +{ + int i,j,k=0; + unsigned int code; + // build size list for each symbol (from JPEG spec) + for (i=0; i < 16; ++i) { + for (j=0; j < count[i]; ++j) { + h->size[k++] = (stbi_uc) (i+1); + if(k >= 257) return stbi__err("bad size list","Corrupt JPEG"); + } + } + h->size[k] = 0; + + // compute actual symbols (from jpeg spec) + code = 0; + k = 0; + for(j=1; j <= 16; ++j) { + // compute delta to add to code to compute symbol id + h->delta[j] = k - code; + if (h->size[k] == j) { + while (h->size[k] == j) + h->code[k++] = (stbi__uint16) (code++); + if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG"); + } + // compute largest code + 1 for this size, preshifted as needed later + h->maxcode[j] = code << (16-j); + code <<= 1; + } + h->maxcode[j] = 0xffffffff; + + // build non-spec acceleration table; 255 is flag for not-accelerated + memset(h->fast, 255, 1 << FAST_BITS); + for (i=0; i < k; ++i) { + int s = h->size[i]; + if (s <= FAST_BITS) { + int c = h->code[i] << (FAST_BITS-s); + int m = 1 << (FAST_BITS-s); + for (j=0; j < m; ++j) { + h->fast[c+j] = (stbi_uc) i; + } + } + } + return 1; +} + +// build a table that decodes both magnitude and value of small ACs in +// one go. +static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h) +{ + int i; + for (i=0; i < (1 << FAST_BITS); ++i) { + stbi_uc fast = h->fast[i]; + fast_ac[i] = 0; + if (fast < 255) { + int rs = h->values[fast]; + int run = (rs >> 4) & 15; + int magbits = rs & 15; + int len = h->size[fast]; + + if (magbits && len + magbits <= FAST_BITS) { + // magnitude code followed by receive_extend code + int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); + int m = 1 << (magbits - 1); + if (k < m) k += (~0U << magbits) + 1; + // if the result is small enough, we can fit it in fast_ac table + if (k >= -128 && k <= 127) + fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits)); + } + } + } +} + +static void stbi__grow_buffer_unsafe(stbi__jpeg *j) +{ + do { + unsigned int b = j->nomore ? 0 : stbi__get8(j->s); + if (b == 0xff) { + int c = stbi__get8(j->s); + while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes + if (c != 0) { + j->marker = (unsigned char) c; + j->nomore = 1; + return; + } + } + j->code_buffer |= b << (24 - j->code_bits); + j->code_bits += 8; + } while (j->code_bits <= 24); +} + +// (1 << n) - 1 +static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; + +// decode a jpeg huffman value from the bitstream +stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h) +{ + unsigned int temp; + int c,k; + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + + // look at the top FAST_BITS and determine what symbol ID it is, + // if the code is <= FAST_BITS + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + k = h->fast[c]; + if (k < 255) { + int s = h->size[k]; + if (s > j->code_bits) + return -1; + j->code_buffer <<= s; + j->code_bits -= s; + return h->values[k]; + } + + // naive test is to shift the code_buffer down so k bits are + // valid, then test against maxcode. To speed this up, we've + // preshifted maxcode left so that it has (16-k) 0s at the + // end; in other words, regardless of the number of bits, it + // wants to be compared against something shifted to have 16; + // that way we don't need to shift inside the loop. + temp = j->code_buffer >> 16; + for (k=FAST_BITS+1 ; ; ++k) + if (temp < h->maxcode[k]) + break; + if (k == 17) { + // error! code not found + j->code_bits -= 16; + return -1; + } + + if (k > j->code_bits) + return -1; + + // convert the huffman code to the symbol id + c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; + if(c < 0 || c >= 256) // symbol id out of bounds! + return -1; + STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); + + // convert the id to a symbol + j->code_bits -= k; + j->code_buffer <<= k; + return h->values[c]; +} + +// bias[n] = (-1<code_bits < n) stbi__grow_buffer_unsafe(j); + if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing + + sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative) + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k + (stbi__jbias[n] & (sgn - 1)); +} + +// get some unsigned bits +stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n) +{ + unsigned int k; + if (j->code_bits < n) stbi__grow_buffer_unsafe(j); + if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k; +} + +stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j) +{ + unsigned int k; + if (j->code_bits < 1) stbi__grow_buffer_unsafe(j); + if (j->code_bits < 1) return 0; // ran out of bits from stream, return 0s intead of continuing + k = j->code_buffer; + j->code_buffer <<= 1; + --j->code_bits; + return k & 0x80000000; +} + +// given a value that's at position X in the zigzag stream, +// where does it appear in the 8x8 matrix coded as row-major? +static const stbi_uc stbi__jpeg_dezigzag[64+15] = +{ + 0, 1, 8, 16, 9, 2, 3, 10, + 17, 24, 32, 25, 18, 11, 4, 5, + 12, 19, 26, 33, 40, 48, 41, 34, + 27, 20, 13, 6, 7, 14, 21, 28, + 35, 42, 49, 56, 57, 50, 43, 36, + 29, 22, 15, 23, 30, 37, 44, 51, + 58, 59, 52, 45, 38, 31, 39, 46, + 53, 60, 61, 54, 47, 55, 62, 63, + // let corrupt input sample past end + 63, 63, 63, 63, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63 +}; + +// decode one 64-entry block-- +static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant) +{ + int diff,dc,k; + int t; + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0 || t > 15) return stbi__err("bad huffman code","Corrupt JPEG"); + + // 0 all the ac values now so we can do it 32-bits at a time + memset(data,0,64*sizeof(data[0])); + + diff = t ? stbi__extend_receive(j, t) : 0; + if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta","Corrupt JPEG"); + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + if (!stbi__mul2shorts_valid(dc, dequant[0])) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + data[0] = (short) (dc * dequant[0]); + + // decode AC components, see JPEG spec + k = 1; + do { + unsigned int zig; + int c,r,s; + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available"); + j->code_buffer <<= s; + j->code_bits -= s; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) ((r >> 8) * dequant[zig]); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (rs != 0xf0) break; // end block + k += 16; + } else { + k += r; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]); + } + } + } while (k < 64); + return 1; +} + +static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b) +{ + int diff,dc; + int t; + if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + + if (j->succ_high == 0) { + // first scan for DC coefficient, must be first + memset(data,0,64*sizeof(data[0])); // 0 all the ac values now + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0 || t > 15) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + diff = t ? stbi__extend_receive(j, t) : 0; + + if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta", "Corrupt JPEG"); + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + if (!stbi__mul2shorts_valid(dc, 1 << j->succ_low)) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + data[0] = (short) (dc * (1 << j->succ_low)); + } else { + // refinement scan for DC coefficient + if (stbi__jpeg_get_bit(j)) + data[0] += (short) (1 << j->succ_low); + } + return 1; +} + +// @OPTIMIZE: store non-zigzagged during the decode passes, +// and only de-zigzag when dequantizing +static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac) +{ + int k; + if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->succ_high == 0) { + int shift = j->succ_low; + + if (j->eob_run) { + --j->eob_run; + return 1; + } + + k = j->spec_start; + do { + unsigned int zig; + int c,r,s; + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available"); + j->code_buffer <<= s; + j->code_bits -= s; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) ((r >> 8) * (1 << shift)); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r); + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + --j->eob_run; + break; + } + k += 16; + } else { + k += r; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) (stbi__extend_receive(j,s) * (1 << shift)); + } + } + } while (k <= j->spec_end); + } else { + // refinement scan for these AC coefficients + + short bit = (short) (1 << j->succ_low); + + if (j->eob_run) { + --j->eob_run; + for (k = j->spec_start; k <= j->spec_end; ++k) { + short *p = &data[stbi__jpeg_dezigzag[k]]; + if (*p != 0) + if (stbi__jpeg_get_bit(j)) + if ((*p & bit)==0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } + } else { + k = j->spec_start; + do { + int r,s; + int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r) - 1; + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + r = 64; // force end of block + } else { + // r=15 s=0 should write 16 0s, so we just do + // a run of 15 0s and then write s (which is 0), + // so we don't have to do anything special here + } + } else { + if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG"); + // sign bit + if (stbi__jpeg_get_bit(j)) + s = bit; + else + s = -bit; + } + + // advance by r + while (k <= j->spec_end) { + short *p = &data[stbi__jpeg_dezigzag[k++]]; + if (*p != 0) { + if (stbi__jpeg_get_bit(j)) + if ((*p & bit)==0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } else { + if (r == 0) { + *p = (short) s; + break; + } + --r; + } + } + } while (k <= j->spec_end); + } + } + return 1; +} + +// take a -128..127 value and stbi__clamp it and convert to 0..255 +stbi_inline static stbi_uc stbi__clamp(int x) +{ + // trick to use a single test to catch both cases + if ((unsigned int) x > 255) { + if (x < 0) return 0; + if (x > 255) return 255; + } + return (stbi_uc) x; +} + +#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5))) +#define stbi__fsh(x) ((x) * 4096) + +// derived from jidctint -- DCT_ISLOW +#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ + int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ + p2 = s2; \ + p3 = s6; \ + p1 = (p2+p3) * stbi__f2f(0.5411961f); \ + t2 = p1 + p3*stbi__f2f(-1.847759065f); \ + t3 = p1 + p2*stbi__f2f( 0.765366865f); \ + p2 = s0; \ + p3 = s4; \ + t0 = stbi__fsh(p2+p3); \ + t1 = stbi__fsh(p2-p3); \ + x0 = t0+t3; \ + x3 = t0-t3; \ + x1 = t1+t2; \ + x2 = t1-t2; \ + t0 = s7; \ + t1 = s5; \ + t2 = s3; \ + t3 = s1; \ + p3 = t0+t2; \ + p4 = t1+t3; \ + p1 = t0+t3; \ + p2 = t1+t2; \ + p5 = (p3+p4)*stbi__f2f( 1.175875602f); \ + t0 = t0*stbi__f2f( 0.298631336f); \ + t1 = t1*stbi__f2f( 2.053119869f); \ + t2 = t2*stbi__f2f( 3.072711026f); \ + t3 = t3*stbi__f2f( 1.501321110f); \ + p1 = p5 + p1*stbi__f2f(-0.899976223f); \ + p2 = p5 + p2*stbi__f2f(-2.562915447f); \ + p3 = p3*stbi__f2f(-1.961570560f); \ + p4 = p4*stbi__f2f(-0.390180644f); \ + t3 += p1+p4; \ + t2 += p2+p3; \ + t1 += p2+p4; \ + t0 += p1+p3; + +static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64]) +{ + int i,val[64],*v=val; + stbi_uc *o; + short *d = data; + + // columns + for (i=0; i < 8; ++i,++d, ++v) { + // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing + if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0 + && d[40]==0 && d[48]==0 && d[56]==0) { + // no shortcut 0 seconds + // (1|2|3|4|5|6|7)==0 0 seconds + // all separate -0.047 seconds + // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds + int dcterm = d[0]*4; + v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; + } else { + STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56]) + // constants scaled things up by 1<<12; let's bring them back + // down, but keep 2 extra bits of precision + x0 += 512; x1 += 512; x2 += 512; x3 += 512; + v[ 0] = (x0+t3) >> 10; + v[56] = (x0-t3) >> 10; + v[ 8] = (x1+t2) >> 10; + v[48] = (x1-t2) >> 10; + v[16] = (x2+t1) >> 10; + v[40] = (x2-t1) >> 10; + v[24] = (x3+t0) >> 10; + v[32] = (x3-t0) >> 10; + } + } + + for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) { + // no fast case since the first 1D IDCT spread components out + STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7]) + // constants scaled things up by 1<<12, plus we had 1<<2 from first + // loop, plus horizontal and vertical each scale by sqrt(8) so together + // we've got an extra 1<<3, so 1<<17 total we need to remove. + // so we want to round that, which means adding 0.5 * 1<<17, + // aka 65536. Also, we'll end up with -128 to 127 that we want + // to encode as 0..255 by adding 128, so we'll add that before the shift + x0 += 65536 + (128<<17); + x1 += 65536 + (128<<17); + x2 += 65536 + (128<<17); + x3 += 65536 + (128<<17); + // tried computing the shifts into temps, or'ing the temps to see + // if any were out of range, but that was slower + o[0] = stbi__clamp((x0+t3) >> 17); + o[7] = stbi__clamp((x0-t3) >> 17); + o[1] = stbi__clamp((x1+t2) >> 17); + o[6] = stbi__clamp((x1-t2) >> 17); + o[2] = stbi__clamp((x2+t1) >> 17); + o[5] = stbi__clamp((x2-t1) >> 17); + o[3] = stbi__clamp((x3+t0) >> 17); + o[4] = stbi__clamp((x3-t0) >> 17); + } +} + +#ifdef STBI_SSE2 +// sse2 integer IDCT. not the fastest possible implementation but it +// produces bit-identical results to the generic C version so it's +// fully "transparent". +static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) +{ + // This is constructed to match our regular (generic) integer IDCT exactly. + __m128i row0, row1, row2, row3, row4, row5, row6, row7; + __m128i tmp; + + // dot product constant: even elems=x, odd elems=y + #define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y)) + + // out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) + // out(1) = c1[even]*x + c1[odd]*y + #define dct_rot(out0,out1, x,y,c0,c1) \ + __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \ + __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \ + __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ + __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ + __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ + __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) + + // out = in << 12 (in 16-bit, out 32-bit) + #define dct_widen(out, in) \ + __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ + __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) + + // wide add + #define dct_wadd(out, a, b) \ + __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_add_epi32(a##_h, b##_h) + + // wide sub + #define dct_wsub(out, a, b) \ + __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) + + // butterfly a/b, add bias, then shift by "s" and pack + #define dct_bfly32o(out0, out1, a,b,bias,s) \ + { \ + __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ + __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ + dct_wadd(sum, abiased, b); \ + dct_wsub(dif, abiased, b); \ + out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ + out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ + } + + // 8-bit interleave step (for transposes) + #define dct_interleave8(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi8(a, b); \ + b = _mm_unpackhi_epi8(tmp, b) + + // 16-bit interleave step (for transposes) + #define dct_interleave16(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi16(a, b); \ + b = _mm_unpackhi_epi16(tmp, b) + + #define dct_pass(bias,shift) \ + { \ + /* even part */ \ + dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \ + __m128i sum04 = _mm_add_epi16(row0, row4); \ + __m128i dif04 = _mm_sub_epi16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \ + dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \ + __m128i sum17 = _mm_add_epi16(row1, row7); \ + __m128i sum35 = _mm_add_epi16(row3, row5); \ + dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \ + dct_wadd(x4, y0o, y4o); \ + dct_wadd(x5, y1o, y5o); \ + dct_wadd(x6, y2o, y5o); \ + dct_wadd(x7, y3o, y4o); \ + dct_bfly32o(row0,row7, x0,x7,bias,shift); \ + dct_bfly32o(row1,row6, x1,x6,bias,shift); \ + dct_bfly32o(row2,row5, x2,x5,bias,shift); \ + dct_bfly32o(row3,row4, x3,x4,bias,shift); \ + } + + __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); + __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f)); + __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); + __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); + __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f)); + __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f)); + __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f)); + __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f)); + + // rounding biases in column/row passes, see stbi__idct_block for explanation. + __m128i bias_0 = _mm_set1_epi32(512); + __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17)); + + // load + row0 = _mm_load_si128((const __m128i *) (data + 0*8)); + row1 = _mm_load_si128((const __m128i *) (data + 1*8)); + row2 = _mm_load_si128((const __m128i *) (data + 2*8)); + row3 = _mm_load_si128((const __m128i *) (data + 3*8)); + row4 = _mm_load_si128((const __m128i *) (data + 4*8)); + row5 = _mm_load_si128((const __m128i *) (data + 5*8)); + row6 = _mm_load_si128((const __m128i *) (data + 6*8)); + row7 = _mm_load_si128((const __m128i *) (data + 7*8)); + + // column pass + dct_pass(bias_0, 10); + + { + // 16bit 8x8 transpose pass 1 + dct_interleave16(row0, row4); + dct_interleave16(row1, row5); + dct_interleave16(row2, row6); + dct_interleave16(row3, row7); + + // transpose pass 2 + dct_interleave16(row0, row2); + dct_interleave16(row1, row3); + dct_interleave16(row4, row6); + dct_interleave16(row5, row7); + + // transpose pass 3 + dct_interleave16(row0, row1); + dct_interleave16(row2, row3); + dct_interleave16(row4, row5); + dct_interleave16(row6, row7); + } + + // row pass + dct_pass(bias_1, 17); + + { + // pack + __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 + __m128i p1 = _mm_packus_epi16(row2, row3); + __m128i p2 = _mm_packus_epi16(row4, row5); + __m128i p3 = _mm_packus_epi16(row6, row7); + + // 8bit 8x8 transpose pass 1 + dct_interleave8(p0, p2); // a0e0a1e1... + dct_interleave8(p1, p3); // c0g0c1g1... + + // transpose pass 2 + dct_interleave8(p0, p1); // a0c0e0g0... + dct_interleave8(p2, p3); // b0d0f0h0... + + // transpose pass 3 + dct_interleave8(p0, p2); // a0b0c0d0... + dct_interleave8(p1, p3); // a4b4c4d4... + + // store + _mm_storel_epi64((__m128i *) out, p0); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p2); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p1); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p3); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e)); + } + +#undef dct_const +#undef dct_rot +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_interleave8 +#undef dct_interleave16 +#undef dct_pass +} + +#endif // STBI_SSE2 + +#ifdef STBI_NEON + +// NEON integer IDCT. should produce bit-identical +// results to the generic C version. +static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) +{ + int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; + + int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); + int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); + int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f)); + int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f)); + int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); + int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); + int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); + int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); + int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f)); + int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f)); + int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f)); + int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f)); + +#define dct_long_mul(out, inq, coeff) \ + int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) + +#define dct_long_mac(out, acc, inq, coeff) \ + int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) + +#define dct_widen(out, inq) \ + int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ + int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) + +// wide add +#define dct_wadd(out, a, b) \ + int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vaddq_s32(a##_h, b##_h) + +// wide sub +#define dct_wsub(out, a, b) \ + int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vsubq_s32(a##_h, b##_h) + +// butterfly a/b, then shift using "shiftop" by "s" and pack +#define dct_bfly32o(out0,out1, a,b,shiftop,s) \ + { \ + dct_wadd(sum, a, b); \ + dct_wsub(dif, a, b); \ + out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ + out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ + } + +#define dct_pass(shiftop, shift) \ + { \ + /* even part */ \ + int16x8_t sum26 = vaddq_s16(row2, row6); \ + dct_long_mul(p1e, sum26, rot0_0); \ + dct_long_mac(t2e, p1e, row6, rot0_1); \ + dct_long_mac(t3e, p1e, row2, rot0_2); \ + int16x8_t sum04 = vaddq_s16(row0, row4); \ + int16x8_t dif04 = vsubq_s16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + int16x8_t sum15 = vaddq_s16(row1, row5); \ + int16x8_t sum17 = vaddq_s16(row1, row7); \ + int16x8_t sum35 = vaddq_s16(row3, row5); \ + int16x8_t sum37 = vaddq_s16(row3, row7); \ + int16x8_t sumodd = vaddq_s16(sum17, sum35); \ + dct_long_mul(p5o, sumodd, rot1_0); \ + dct_long_mac(p1o, p5o, sum17, rot1_1); \ + dct_long_mac(p2o, p5o, sum35, rot1_2); \ + dct_long_mul(p3o, sum37, rot2_0); \ + dct_long_mul(p4o, sum15, rot2_1); \ + dct_wadd(sump13o, p1o, p3o); \ + dct_wadd(sump24o, p2o, p4o); \ + dct_wadd(sump23o, p2o, p3o); \ + dct_wadd(sump14o, p1o, p4o); \ + dct_long_mac(x4, sump13o, row7, rot3_0); \ + dct_long_mac(x5, sump24o, row5, rot3_1); \ + dct_long_mac(x6, sump23o, row3, rot3_2); \ + dct_long_mac(x7, sump14o, row1, rot3_3); \ + dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \ + dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \ + dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \ + dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \ + } + + // load + row0 = vld1q_s16(data + 0*8); + row1 = vld1q_s16(data + 1*8); + row2 = vld1q_s16(data + 2*8); + row3 = vld1q_s16(data + 3*8); + row4 = vld1q_s16(data + 4*8); + row5 = vld1q_s16(data + 5*8); + row6 = vld1q_s16(data + 6*8); + row7 = vld1q_s16(data + 7*8); + + // add DC bias + row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); + + // column pass + dct_pass(vrshrn_n_s32, 10); + + // 16bit 8x8 transpose + { +// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. +// whether compilers actually get this is another story, sadly. +#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; } +#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); } +#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); } + + // pass 1 + dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 + dct_trn16(row2, row3); + dct_trn16(row4, row5); + dct_trn16(row6, row7); + + // pass 2 + dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 + dct_trn32(row1, row3); + dct_trn32(row4, row6); + dct_trn32(row5, row7); + + // pass 3 + dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 + dct_trn64(row1, row5); + dct_trn64(row2, row6); + dct_trn64(row3, row7); + +#undef dct_trn16 +#undef dct_trn32 +#undef dct_trn64 + } + + // row pass + // vrshrn_n_s32 only supports shifts up to 16, we need + // 17. so do a non-rounding shift of 16 first then follow + // up with a rounding shift by 1. + dct_pass(vshrn_n_s32, 16); + + { + // pack and round + uint8x8_t p0 = vqrshrun_n_s16(row0, 1); + uint8x8_t p1 = vqrshrun_n_s16(row1, 1); + uint8x8_t p2 = vqrshrun_n_s16(row2, 1); + uint8x8_t p3 = vqrshrun_n_s16(row3, 1); + uint8x8_t p4 = vqrshrun_n_s16(row4, 1); + uint8x8_t p5 = vqrshrun_n_s16(row5, 1); + uint8x8_t p6 = vqrshrun_n_s16(row6, 1); + uint8x8_t p7 = vqrshrun_n_s16(row7, 1); + + // again, these can translate into one instruction, but often don't. +#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; } +#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); } +#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); } + + // sadly can't use interleaved stores here since we only write + // 8 bytes to each scan line! + + // 8x8 8-bit transpose pass 1 + dct_trn8_8(p0, p1); + dct_trn8_8(p2, p3); + dct_trn8_8(p4, p5); + dct_trn8_8(p6, p7); + + // pass 2 + dct_trn8_16(p0, p2); + dct_trn8_16(p1, p3); + dct_trn8_16(p4, p6); + dct_trn8_16(p5, p7); + + // pass 3 + dct_trn8_32(p0, p4); + dct_trn8_32(p1, p5); + dct_trn8_32(p2, p6); + dct_trn8_32(p3, p7); + + // store + vst1_u8(out, p0); out += out_stride; + vst1_u8(out, p1); out += out_stride; + vst1_u8(out, p2); out += out_stride; + vst1_u8(out, p3); out += out_stride; + vst1_u8(out, p4); out += out_stride; + vst1_u8(out, p5); out += out_stride; + vst1_u8(out, p6); out += out_stride; + vst1_u8(out, p7); + +#undef dct_trn8_8 +#undef dct_trn8_16 +#undef dct_trn8_32 + } + +#undef dct_long_mul +#undef dct_long_mac +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_pass +} + +#endif // STBI_NEON + +#define STBI__MARKER_none 0xff +// if there's a pending marker from the entropy stream, return that +// otherwise, fetch from the stream and get a marker. if there's no +// marker, return 0xff, which is never a valid marker value +static stbi_uc stbi__get_marker(stbi__jpeg *j) +{ + stbi_uc x; + if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; } + x = stbi__get8(j->s); + if (x != 0xff) return STBI__MARKER_none; + while (x == 0xff) + x = stbi__get8(j->s); // consume repeated 0xff fill bytes + return x; +} + +// in each scan, we'll have scan_n components, and the order +// of the components is specified by order[] +#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) + +// after a restart interval, stbi__jpeg_reset the entropy decoder and +// the dc prediction +static void stbi__jpeg_reset(stbi__jpeg *j) +{ + j->code_bits = 0; + j->code_buffer = 0; + j->nomore = 0; + j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; + j->marker = STBI__MARKER_none; + j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; + j->eob_run = 0; + // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, + // since we don't even allow 1<<30 pixels +} + +static int stbi__parse_entropy_coded_data(stbi__jpeg *z) +{ + stbi__jpeg_reset(z); + if (!z->progressive) { + if (z->scan_n == 1) { + int i,j; + STBI_SIMD_ALIGN(short, data[64]); + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + // if it's NOT a restart, then just bail, so we get corrupt data + // rather than no data + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i,j,k,x,y; + STBI_SIMD_ALIGN(short, data[64]); + for (j=0; j < z->img_mcu_y; ++j) { + for (i=0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k=0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y=0; y < z->img_comp[n].v; ++y) { + for (x=0; x < z->img_comp[n].h; ++x) { + int x2 = (i*z->img_comp[n].h + x)*8; + int y2 = (j*z->img_comp[n].v + y)*8; + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data); + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } else { + if (z->scan_n == 1) { + int i,j; + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + if (z->spec_start == 0) { + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } else { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) + return 0; + } + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i,j,k,x,y; + for (j=0; j < z->img_mcu_y; ++j) { + for (i=0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k=0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y=0; y < z->img_comp[n].v; ++y) { + for (x=0; x < z->img_comp[n].h; ++x) { + int x2 = (i*z->img_comp[n].h + x); + int y2 = (j*z->img_comp[n].v + y); + short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } +} + +static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant) +{ + int i; + for (i=0; i < 64; ++i) + data[i] *= dequant[i]; +} + +static void stbi__jpeg_finish(stbi__jpeg *z) +{ + if (z->progressive) { + // dequantize and idct the data + int i,j,n; + for (n=0; n < z->s->img_n; ++n) { + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); + } + } + } + } +} + +static int stbi__process_marker(stbi__jpeg *z, int m) +{ + int L; + switch (m) { + case STBI__MARKER_none: // no marker found + return stbi__err("expected marker","Corrupt JPEG"); + + case 0xDD: // DRI - specify restart interval + if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG"); + z->restart_interval = stbi__get16be(z->s); + return 1; + + case 0xDB: // DQT - define quantization table + L = stbi__get16be(z->s)-2; + while (L > 0) { + int q = stbi__get8(z->s); + int p = q >> 4, sixteen = (p != 0); + int t = q & 15,i; + if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG"); + if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG"); + + for (i=0; i < 64; ++i) + z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); + L -= (sixteen ? 129 : 65); + } + return L==0; + + case 0xC4: // DHT - define huffman table + L = stbi__get16be(z->s)-2; + while (L > 0) { + stbi_uc *v; + int sizes[16],i,n=0; + int q = stbi__get8(z->s); + int tc = q >> 4; + int th = q & 15; + if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG"); + for (i=0; i < 16; ++i) { + sizes[i] = stbi__get8(z->s); + n += sizes[i]; + } + if(n > 256) return stbi__err("bad DHT header","Corrupt JPEG"); // Loop over i < n would write past end of values! + L -= 17; + if (tc == 0) { + if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0; + v = z->huff_dc[th].values; + } else { + if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0; + v = z->huff_ac[th].values; + } + for (i=0; i < n; ++i) + v[i] = stbi__get8(z->s); + if (tc != 0) + stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); + L -= n; + } + return L==0; + } + + // check for comment block or APP blocks + if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { + L = stbi__get16be(z->s); + if (L < 2) { + if (m == 0xFE) + return stbi__err("bad COM len","Corrupt JPEG"); + else + return stbi__err("bad APP len","Corrupt JPEG"); + } + L -= 2; + + if (m == 0xE0 && L >= 5) { // JFIF APP0 segment + static const unsigned char tag[5] = {'J','F','I','F','\0'}; + int ok = 1; + int i; + for (i=0; i < 5; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 5; + if (ok) + z->jfif = 1; + } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment + static const unsigned char tag[6] = {'A','d','o','b','e','\0'}; + int ok = 1; + int i; + for (i=0; i < 6; ++i) + if (stbi__get8(z->s) != tag[i]) + ok = 0; + L -= 6; + if (ok) { + stbi__get8(z->s); // version + stbi__get16be(z->s); // flags0 + stbi__get16be(z->s); // flags1 + z->app14_color_transform = stbi__get8(z->s); // color transform + L -= 6; + } + } + + stbi__skip(z->s, L); + return 1; + } + + return stbi__err("unknown marker","Corrupt JPEG"); +} + +// after we see SOS +static int stbi__process_scan_header(stbi__jpeg *z) +{ + int i; + int Ls = stbi__get16be(z->s); + z->scan_n = stbi__get8(z->s); + if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG"); + if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG"); + for (i=0; i < z->scan_n; ++i) { + int id = stbi__get8(z->s), which; + int q = stbi__get8(z->s); + for (which = 0; which < z->s->img_n; ++which) + if (z->img_comp[which].id == id) + break; + if (which == z->s->img_n) return 0; // no match + z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG"); + z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG"); + z->order[i] = which; + } + + { + int aa; + z->spec_start = stbi__get8(z->s); + z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 + aa = stbi__get8(z->s); + z->succ_high = (aa >> 4); + z->succ_low = (aa & 15); + if (z->progressive) { + if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) + return stbi__err("bad SOS", "Corrupt JPEG"); + } else { + if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG"); + if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG"); + z->spec_end = 63; + } + } + + return 1; +} + +static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why) +{ + int i; + for (i=0; i < ncomp; ++i) { + if (z->img_comp[i].raw_data) { + STBI_FREE(z->img_comp[i].raw_data); + z->img_comp[i].raw_data = NULL; + z->img_comp[i].data = NULL; + } + if (z->img_comp[i].raw_coeff) { + STBI_FREE(z->img_comp[i].raw_coeff); + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].coeff = 0; + } + if (z->img_comp[i].linebuf) { + STBI_FREE(z->img_comp[i].linebuf); + z->img_comp[i].linebuf = NULL; + } + } + return why; +} + +static int stbi__process_frame_header(stbi__jpeg *z, int scan) +{ + stbi__context *s = z->s; + int Lf,p,i,q, h_max=1,v_max=1,c; + Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG + p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline + s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG + s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires + if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); + c = stbi__get8(s); + if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG"); + s->img_n = c; + for (i=0; i < c; ++i) { + z->img_comp[i].data = NULL; + z->img_comp[i].linebuf = NULL; + } + + if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG"); + + z->rgb = 0; + for (i=0; i < s->img_n; ++i) { + static const unsigned char rgb[3] = { 'R', 'G', 'B' }; + z->img_comp[i].id = stbi__get8(s); + if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) + ++z->rgb; + q = stbi__get8(s); + z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG"); + z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG"); + z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG"); + } + + if (scan != STBI__SCAN_load) return 1; + + if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode"); + + for (i=0; i < s->img_n; ++i) { + if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; + if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; + } + + // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios + // and I've never seen a non-corrupted JPEG file actually use them + for (i=0; i < s->img_n; ++i) { + if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG"); + if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG"); + } + + // compute interleaved mcu info + z->img_h_max = h_max; + z->img_v_max = v_max; + z->img_mcu_w = h_max * 8; + z->img_mcu_h = v_max * 8; + // these sizes can't be more than 17 bits + z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w; + z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h; + + for (i=0; i < s->img_n; ++i) { + // number of effective pixels (e.g. for non-interleaved MCU) + z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max; + z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max; + // to simplify generation, we'll allocate enough memory to decode + // the bogus oversized data from using interleaved MCUs and their + // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't + // discard the extra data until colorspace conversion + // + // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) + // so these muls can't overflow with 32-bit ints (which we require) + z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; + z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; + z->img_comp[i].coeff = 0; + z->img_comp[i].raw_coeff = 0; + z->img_comp[i].linebuf = NULL; + z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); + if (z->img_comp[i].raw_data == NULL) + return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); + // align blocks for idct using mmx/sse + z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15); + if (z->progressive) { + // w2, h2 are multiples of 8 (see above) + z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; + z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; + z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); + if (z->img_comp[i].raw_coeff == NULL) + return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory")); + z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15); + } + } + + return 1; +} + +// use comparisons since in some cases we handle more than one case (e.g. SOF) +#define stbi__DNL(x) ((x) == 0xdc) +#define stbi__SOI(x) ((x) == 0xd8) +#define stbi__EOI(x) ((x) == 0xd9) +#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) +#define stbi__SOS(x) ((x) == 0xda) + +#define stbi__SOF_progressive(x) ((x) == 0xc2) + +static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan) +{ + int m; + z->jfif = 0; + z->app14_color_transform = -1; // valid values are 0,1,2 + z->marker = STBI__MARKER_none; // initialize cached marker to empty + m = stbi__get_marker(z); + if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG"); + if (scan == STBI__SCAN_type) return 1; + m = stbi__get_marker(z); + while (!stbi__SOF(m)) { + if (!stbi__process_marker(z,m)) return 0; + m = stbi__get_marker(z); + while (m == STBI__MARKER_none) { + // some files have extra padding after their blocks, so ok, we'll scan + if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG"); + m = stbi__get_marker(z); + } + } + z->progressive = stbi__SOF_progressive(m); + if (!stbi__process_frame_header(z, scan)) return 0; + return 1; +} + +static stbi_uc stbi__skip_jpeg_junk_at_end(stbi__jpeg *j) +{ + // some JPEGs have junk at end, skip over it but if we find what looks + // like a valid marker, resume there + while (!stbi__at_eof(j->s)) { + stbi_uc x = stbi__get8(j->s); + while (x == 0xff) { // might be a marker + if (stbi__at_eof(j->s)) return STBI__MARKER_none; + x = stbi__get8(j->s); + if (x != 0x00 && x != 0xff) { + // not a stuffed zero or lead-in to another marker, looks + // like an actual marker, return it + return x; + } + // stuffed zero has x=0 now which ends the loop, meaning we go + // back to regular scan loop. + // repeated 0xff keeps trying to read the next byte of the marker. + } + } + return STBI__MARKER_none; +} + +// decode image to YCbCr format +static int stbi__decode_jpeg_image(stbi__jpeg *j) +{ + int m; + for (m = 0; m < 4; m++) { + j->img_comp[m].raw_data = NULL; + j->img_comp[m].raw_coeff = NULL; + } + j->restart_interval = 0; + if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0; + m = stbi__get_marker(j); + while (!stbi__EOI(m)) { + if (stbi__SOS(m)) { + if (!stbi__process_scan_header(j)) return 0; + if (!stbi__parse_entropy_coded_data(j)) return 0; + if (j->marker == STBI__MARKER_none ) { + j->marker = stbi__skip_jpeg_junk_at_end(j); + // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 + } + m = stbi__get_marker(j); + if (STBI__RESTART(m)) + m = stbi__get_marker(j); + } else if (stbi__DNL(m)) { + int Ld = stbi__get16be(j->s); + stbi__uint32 NL = stbi__get16be(j->s); + if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG"); + if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG"); + m = stbi__get_marker(j); + } else { + if (!stbi__process_marker(j, m)) return 1; + m = stbi__get_marker(j); + } + } + if (j->progressive) + stbi__jpeg_finish(j); + return 1; +} + +// static jfif-centered resampling (across block boundaries) + +typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1, + int w, int hs); + +#define stbi__div4(x) ((stbi_uc) ((x) >> 2)) + +static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + STBI_NOTUSED(out); + STBI_NOTUSED(in_far); + STBI_NOTUSED(w); + STBI_NOTUSED(hs); + return in_near; +} + +static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate two samples vertically for every one in input + int i; + STBI_NOTUSED(hs); + for (i=0; i < w; ++i) + out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2); + return out; +} + +static stbi_uc* stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate two samples horizontally for every one in input + int i; + stbi_uc *input = in_near; + + if (w == 1) { + // if only one sample, can't do any interpolation + out[0] = out[1] = input[0]; + return out; + } + + out[0] = input[0]; + out[1] = stbi__div4(input[0]*3 + input[1] + 2); + for (i=1; i < w-1; ++i) { + int n = 3*input[i]+2; + out[i*2+0] = stbi__div4(n+input[i-1]); + out[i*2+1] = stbi__div4(n+input[i+1]); + } + out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2); + out[i*2+1] = input[w-1]; + + STBI_NOTUSED(in_far); + STBI_NOTUSED(hs); + + return out; +} + +#define stbi__div16(x) ((stbi_uc) ((x) >> 4)) + +static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate 2x2 samples for every one in input + int i,t0,t1; + if (w == 1) { + out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3*in_near[0] + in_far[0]; + out[0] = stbi__div4(t1+2); + for (i=1; i < w; ++i) { + t0 = t1; + t1 = 3*in_near[i]+in_far[i]; + out[i*2-1] = stbi__div16(3*t0 + t1 + 8); + out[i*2 ] = stbi__div16(3*t1 + t0 + 8); + } + out[w*2-1] = stbi__div4(t1+2); + + STBI_NOTUSED(hs); + + return out; +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate 2x2 samples for every one in input + int i=0,t0,t1; + + if (w == 1) { + out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3*in_near[0] + in_far[0]; + // process groups of 8 pixels for as long as we can. + // note we can't handle the last pixel in a row in this loop + // because we need to handle the filter boundary conditions. + for (; i < ((w-1) & ~7); i += 8) { +#if defined(STBI_SSE2) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + __m128i zero = _mm_setzero_si128(); + __m128i farb = _mm_loadl_epi64((__m128i *) (in_far + i)); + __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i)); + __m128i farw = _mm_unpacklo_epi8(farb, zero); + __m128i nearw = _mm_unpacklo_epi8(nearb, zero); + __m128i diff = _mm_sub_epi16(farw, nearw); + __m128i nears = _mm_slli_epi16(nearw, 2); + __m128i curr = _mm_add_epi16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + __m128i prv0 = _mm_slli_si128(curr, 2); + __m128i nxt0 = _mm_srli_si128(curr, 2); + __m128i prev = _mm_insert_epi16(prv0, t1, 0); + __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + __m128i bias = _mm_set1_epi16(8); + __m128i curs = _mm_slli_epi16(curr, 2); + __m128i prvd = _mm_sub_epi16(prev, curr); + __m128i nxtd = _mm_sub_epi16(next, curr); + __m128i curb = _mm_add_epi16(curs, bias); + __m128i even = _mm_add_epi16(prvd, curb); + __m128i odd = _mm_add_epi16(nxtd, curb); + + // interleave even and odd pixels, then undo scaling. + __m128i int0 = _mm_unpacklo_epi16(even, odd); + __m128i int1 = _mm_unpackhi_epi16(even, odd); + __m128i de0 = _mm_srli_epi16(int0, 4); + __m128i de1 = _mm_srli_epi16(int1, 4); + + // pack and write output + __m128i outv = _mm_packus_epi16(de0, de1); + _mm_storeu_si128((__m128i *) (out + i*2), outv); +#elif defined(STBI_NEON) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + uint8x8_t farb = vld1_u8(in_far + i); + uint8x8_t nearb = vld1_u8(in_near + i); + int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); + int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); + int16x8_t curr = vaddq_s16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + int16x8_t prv0 = vextq_s16(curr, curr, 7); + int16x8_t nxt0 = vextq_s16(curr, curr, 1); + int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); + int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + int16x8_t curs = vshlq_n_s16(curr, 2); + int16x8_t prvd = vsubq_s16(prev, curr); + int16x8_t nxtd = vsubq_s16(next, curr); + int16x8_t even = vaddq_s16(curs, prvd); + int16x8_t odd = vaddq_s16(curs, nxtd); + + // undo scaling and round, then store with even/odd phases interleaved + uint8x8x2_t o; + o.val[0] = vqrshrun_n_s16(even, 4); + o.val[1] = vqrshrun_n_s16(odd, 4); + vst2_u8(out + i*2, o); +#endif + + // "previous" value for next iter + t1 = 3*in_near[i+7] + in_far[i+7]; + } + + t0 = t1; + t1 = 3*in_near[i] + in_far[i]; + out[i*2] = stbi__div16(3*t1 + t0 + 8); + + for (++i; i < w; ++i) { + t0 = t1; + t1 = 3*in_near[i]+in_far[i]; + out[i*2-1] = stbi__div16(3*t0 + t1 + 8); + out[i*2 ] = stbi__div16(3*t1 + t0 + 8); + } + out[w*2-1] = stbi__div4(t1+2); + + STBI_NOTUSED(hs); + + return out; +} +#endif + +static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // resample with nearest-neighbor + int i,j; + STBI_NOTUSED(in_far); + for (i=0; i < w; ++i) + for (j=0; j < hs; ++j) + out[i*hs+j] = in_near[i]; + return out; +} + +// this is a reduced-precision calculation of YCbCr-to-RGB introduced +// to make sure the code produces the same results in both SIMD and scalar +#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) +static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) +{ + int i; + for (i=0; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1<<19); // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr* stbi__float2fixed(1.40200f); + g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb* stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step) +{ + int i = 0; + +#ifdef STBI_SSE2 + // step == 3 is pretty ugly on the final interleave, and i'm not convinced + // it's useful in practice (you wouldn't use it for textures, for example). + // so just accelerate step == 4 case. + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + __m128i signflip = _mm_set1_epi8(-0x80); + __m128i cr_const0 = _mm_set1_epi16( (short) ( 1.40200f*4096.0f+0.5f)); + __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f)); + __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f)); + __m128i cb_const1 = _mm_set1_epi16( (short) ( 1.77200f*4096.0f+0.5f)); + __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128); + __m128i xw = _mm_set1_epi16(255); // alpha channel + + for (; i+7 < count; i += 8) { + // load + __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i)); + __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i)); + __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i)); + __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 + __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 + + // unpack to short (and left-shift cr, cb by 8) + __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); + __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); + __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); + + // color transform + __m128i yws = _mm_srli_epi16(yw, 4); + __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); + __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); + __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); + __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); + __m128i rws = _mm_add_epi16(cr0, yws); + __m128i gwt = _mm_add_epi16(cb0, yws); + __m128i bws = _mm_add_epi16(yws, cb1); + __m128i gws = _mm_add_epi16(gwt, cr1); + + // descale + __m128i rw = _mm_srai_epi16(rws, 4); + __m128i bw = _mm_srai_epi16(bws, 4); + __m128i gw = _mm_srai_epi16(gws, 4); + + // back to byte, set up for transpose + __m128i brb = _mm_packus_epi16(rw, bw); + __m128i gxb = _mm_packus_epi16(gw, xw); + + // transpose to interleave channels + __m128i t0 = _mm_unpacklo_epi8(brb, gxb); + __m128i t1 = _mm_unpackhi_epi8(brb, gxb); + __m128i o0 = _mm_unpacklo_epi16(t0, t1); + __m128i o1 = _mm_unpackhi_epi16(t0, t1); + + // store + _mm_storeu_si128((__m128i *) (out + 0), o0); + _mm_storeu_si128((__m128i *) (out + 16), o1); + out += 32; + } + } +#endif + +#ifdef STBI_NEON + // in this version, step=3 support would be easy to add. but is there demand? + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + uint8x8_t signflip = vdup_n_u8(0x80); + int16x8_t cr_const0 = vdupq_n_s16( (short) ( 1.40200f*4096.0f+0.5f)); + int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f)); + int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f)); + int16x8_t cb_const1 = vdupq_n_s16( (short) ( 1.77200f*4096.0f+0.5f)); + + for (; i+7 < count; i += 8) { + // load + uint8x8_t y_bytes = vld1_u8(y + i); + uint8x8_t cr_bytes = vld1_u8(pcr + i); + uint8x8_t cb_bytes = vld1_u8(pcb + i); + int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); + int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); + + // expand to s16 + int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); + int16x8_t crw = vshll_n_s8(cr_biased, 7); + int16x8_t cbw = vshll_n_s8(cb_biased, 7); + + // color transform + int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); + int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); + int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); + int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); + int16x8_t rws = vaddq_s16(yws, cr0); + int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); + int16x8_t bws = vaddq_s16(yws, cb1); + + // undo scaling, round, convert to byte + uint8x8x4_t o; + o.val[0] = vqrshrun_n_s16(rws, 4); + o.val[1] = vqrshrun_n_s16(gws, 4); + o.val[2] = vqrshrun_n_s16(bws, 4); + o.val[3] = vdup_n_u8(255); + + // store, interleaving r/g/b/a + vst4_u8(out, o); + out += 8*4; + } + } +#endif + + for (; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1<<19); // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr* stbi__float2fixed(1.40200f); + g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb* stbi__float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} +#endif + +// set up the kernels +static void stbi__setup_jpeg(stbi__jpeg *j) +{ + j->idct_block_kernel = stbi__idct_block; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; + +#ifdef STBI_SSE2 + if (stbi__sse2_available()) { + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; + } +#endif + +#ifdef STBI_NEON + j->idct_block_kernel = stbi__idct_simd; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; +#endif +} + +// clean up the temporary component buffers +static void stbi__cleanup_jpeg(stbi__jpeg *j) +{ + stbi__free_jpeg_components(j, j->s->img_n, 0); +} + +typedef struct +{ + resample_row_func resample; + stbi_uc *line0,*line1; + int hs,vs; // expansion factor in each axis + int w_lores; // horizontal pixels pre-expansion + int ystep; // how far through vertical expansion we are + int ypos; // which pre-expansion row we're on +} stbi__resample; + +// fast 0..255 * 0..255 => 0..255 rounded multiplication +static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) +{ + unsigned int t = x*y + 128; + return (stbi_uc) ((t + (t >>8)) >> 8); +} + +static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp) +{ + int n, decode_n, is_rgb; + z->s->img_n = 0; // make stbi__cleanup_jpeg safe + + // validate req_comp + if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); + + // load a jpeg image from whichever source, but leave in YCbCr format + if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } + + // determine actual number of components to generate + n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; + + is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); + + if (z->s->img_n == 3 && n < 3 && !is_rgb) + decode_n = 1; + else + decode_n = z->s->img_n; + + // nothing to do if no components requested; check this now to avoid + // accessing uninitialized coutput[0] later + if (decode_n <= 0) { stbi__cleanup_jpeg(z); return NULL; } + + // resample and color-convert + { + int k; + unsigned int i,j; + stbi_uc *output; + stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL }; + + stbi__resample res_comp[4]; + + for (k=0; k < decode_n; ++k) { + stbi__resample *r = &res_comp[k]; + + // allocate line buffer big enough for upsampling off the edges + // with upsample factor of 4 + z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3); + if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } + + r->hs = z->img_h_max / z->img_comp[k].h; + r->vs = z->img_v_max / z->img_comp[k].v; + r->ystep = r->vs >> 1; + r->w_lores = (z->s->img_x + r->hs-1) / r->hs; + r->ypos = 0; + r->line0 = r->line1 = z->img_comp[k].data; + + if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; + else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2; + else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2; + else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel; + else r->resample = stbi__resample_row_generic; + } + + // can't error after this so, this is safe + output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); + if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } + + // now go ahead and resample + for (j=0; j < z->s->img_y; ++j) { + stbi_uc *out = output + n * z->s->img_x * j; + for (k=0; k < decode_n; ++k) { + stbi__resample *r = &res_comp[k]; + int y_bot = r->ystep >= (r->vs >> 1); + coutput[k] = r->resample(z->img_comp[k].linebuf, + y_bot ? r->line1 : r->line0, + y_bot ? r->line0 : r->line1, + r->w_lores, r->hs); + if (++r->ystep >= r->vs) { + r->ystep = 0; + r->line0 = r->line1; + if (++r->ypos < z->img_comp[k].y) + r->line1 += z->img_comp[k].w2; + } + } + if (n >= 3) { + stbi_uc *y = coutput[0]; + if (z->s->img_n == 3) { + if (is_rgb) { + for (i=0; i < z->s->img_x; ++i) { + out[0] = y[i]; + out[1] = coutput[1][i]; + out[2] = coutput[2][i]; + out[3] = 255; + out += n; + } + } else { + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else if (z->s->img_n == 4) { + if (z->app14_color_transform == 0) { // CMYK + for (i=0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(coutput[0][i], m); + out[1] = stbi__blinn_8x8(coutput[1][i], m); + out[2] = stbi__blinn_8x8(coutput[2][i], m); + out[3] = 255; + out += n; + } + } else if (z->app14_color_transform == 2) { // YCCK + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + for (i=0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + out[0] = stbi__blinn_8x8(255 - out[0], m); + out[1] = stbi__blinn_8x8(255 - out[1], m); + out[2] = stbi__blinn_8x8(255 - out[2], m); + out += n; + } + } else { // YCbCr + alpha? Ignore the fourth channel for now + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } + } else + for (i=0; i < z->s->img_x; ++i) { + out[0] = out[1] = out[2] = y[i]; + out[3] = 255; // not used if n==3 + out += n; + } + } else { + if (is_rgb) { + if (n == 1) + for (i=0; i < z->s->img_x; ++i) + *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + else { + for (i=0; i < z->s->img_x; ++i, out += 2) { + out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); + out[1] = 255; + } + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 0) { + for (i=0; i < z->s->img_x; ++i) { + stbi_uc m = coutput[3][i]; + stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); + stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); + stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); + out[0] = stbi__compute_y(r, g, b); + out[1] = 255; + out += n; + } + } else if (z->s->img_n == 4 && z->app14_color_transform == 2) { + for (i=0; i < z->s->img_x; ++i) { + out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); + out[1] = 255; + out += n; + } + } else { + stbi_uc *y = coutput[0]; + if (n == 1) + for (i=0; i < z->s->img_x; ++i) out[i] = y[i]; + else + for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; } + } + } + } + stbi__cleanup_jpeg(z); + *out_x = z->s->img_x; + *out_y = z->s->img_y; + if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output + return output; + } +} + +static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + unsigned char* result; + stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg)); + if (!j) return stbi__errpuc("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + STBI_NOTUSED(ri); + j->s = s; + stbi__setup_jpeg(j); + result = load_jpeg_image(j, x,y,comp,req_comp); + STBI_FREE(j); + return result; +} + +static int stbi__jpeg_test(stbi__context *s) +{ + int r; + stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); + if (!j) return stbi__err("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + j->s = s; + stbi__setup_jpeg(j); + r = stbi__decode_jpeg_header(j, STBI__SCAN_type); + stbi__rewind(s); + STBI_FREE(j); + return r; +} + +static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp) +{ + if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { + stbi__rewind( j->s ); + return 0; + } + if (x) *x = j->s->img_x; + if (y) *y = j->s->img_y; + if (comp) *comp = j->s->img_n >= 3 ? 3 : 1; + return 1; +} + +static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp) +{ + int result; + stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg))); + if (!j) return stbi__err("outofmem", "Out of memory"); + memset(j, 0, sizeof(stbi__jpeg)); + j->s = s; + result = stbi__jpeg_info_raw(j, x, y, comp); + STBI_FREE(j); + return result; +} +#endif + +// public domain zlib decode v0.2 Sean Barrett 2006-11-18 +// simple implementation +// - all input must be provided in an upfront buffer +// - all output is written to a single output buffer (can malloc/realloc) +// performance +// - fast huffman + +#ifndef STBI_NO_ZLIB + +// fast-way is faster to check than jpeg huffman, but slow way is slower +#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables +#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) +#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet + +// zlib-style huffman encoding +// (jpegs packs from left, zlib from right, so can't share code) +typedef struct +{ + stbi__uint16 fast[1 << STBI__ZFAST_BITS]; + stbi__uint16 firstcode[16]; + int maxcode[17]; + stbi__uint16 firstsymbol[16]; + stbi_uc size[STBI__ZNSYMS]; + stbi__uint16 value[STBI__ZNSYMS]; +} stbi__zhuffman; + +stbi_inline static int stbi__bitreverse16(int n) +{ + n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); + n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); + n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); + n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); + return n; +} + +stbi_inline static int stbi__bit_reverse(int v, int bits) +{ + STBI_ASSERT(bits <= 16); + // to bit reverse n bits, reverse 16 and shift + // e.g. 11 bits, bit reverse and shift away 5 + return stbi__bitreverse16(v) >> (16-bits); +} + +static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num) +{ + int i,k=0; + int code, next_code[16], sizes[17]; + + // DEFLATE spec for generating codes + memset(sizes, 0, sizeof(sizes)); + memset(z->fast, 0, sizeof(z->fast)); + for (i=0; i < num; ++i) + ++sizes[sizelist[i]]; + sizes[0] = 0; + for (i=1; i < 16; ++i) + if (sizes[i] > (1 << i)) + return stbi__err("bad sizes", "Corrupt PNG"); + code = 0; + for (i=1; i < 16; ++i) { + next_code[i] = code; + z->firstcode[i] = (stbi__uint16) code; + z->firstsymbol[i] = (stbi__uint16) k; + code = (code + sizes[i]); + if (sizes[i]) + if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG"); + z->maxcode[i] = code << (16-i); // preshift for inner loop + code <<= 1; + k += sizes[i]; + } + z->maxcode[16] = 0x10000; // sentinel + for (i=0; i < num; ++i) { + int s = sizelist[i]; + if (s) { + int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; + stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i); + z->size [c] = (stbi_uc ) s; + z->value[c] = (stbi__uint16) i; + if (s <= STBI__ZFAST_BITS) { + int j = stbi__bit_reverse(next_code[s],s); + while (j < (1 << STBI__ZFAST_BITS)) { + z->fast[j] = fastv; + j += (1 << s); + } + } + ++next_code[s]; + } + } + return 1; +} + +// zlib-from-memory implementation for PNG reading +// because PNG allows splitting the zlib stream arbitrarily, +// and it's annoying structurally to have PNG call ZLIB call PNG, +// we require PNG read all the IDATs and combine them into a single +// memory buffer + +typedef struct +{ + stbi_uc *zbuffer, *zbuffer_end; + int num_bits; + int hit_zeof_once; + stbi__uint32 code_buffer; + + char *zout; + char *zout_start; + char *zout_end; + int z_expandable; + + stbi__zhuffman z_length, z_distance; +} stbi__zbuf; + +stbi_inline static int stbi__zeof(stbi__zbuf *z) +{ + return (z->zbuffer >= z->zbuffer_end); +} + +stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z) +{ + return stbi__zeof(z) ? 0 : *z->zbuffer++; +} + +static void stbi__fill_bits(stbi__zbuf *z) +{ + do { + if (z->code_buffer >= (1U << z->num_bits)) { + z->zbuffer = z->zbuffer_end; /* treat this as EOF so we fail. */ + return; + } + z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits; + z->num_bits += 8; + } while (z->num_bits <= 24); +} + +stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n) +{ + unsigned int k; + if (z->num_bits < n) stbi__fill_bits(z); + k = z->code_buffer & ((1 << n) - 1); + z->code_buffer >>= n; + z->num_bits -= n; + return k; +} + +static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z) +{ + int b,s,k; + // not resolved by fast table, so compute it the slow way + // use jpeg approach, which requires MSbits at top + k = stbi__bit_reverse(a->code_buffer, 16); + for (s=STBI__ZFAST_BITS+1; ; ++s) + if (k < z->maxcode[s]) + break; + if (s >= 16) return -1; // invalid code! + // code size is s, so: + b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s]; + if (b >= STBI__ZNSYMS) return -1; // some data was corrupt somewhere! + if (z->size[b] != s) return -1; // was originally an assert, but report failure instead. + a->code_buffer >>= s; + a->num_bits -= s; + return z->value[b]; +} + +stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z) +{ + int b,s; + if (a->num_bits < 16) { + if (stbi__zeof(a)) { + if (!a->hit_zeof_once) { + // This is the first time we hit eof, insert 16 extra padding btis + // to allow us to keep going; if we actually consume any of them + // though, that is invalid data. This is caught later. + a->hit_zeof_once = 1; + a->num_bits += 16; // add 16 implicit zero bits + } else { + // We already inserted our extra 16 padding bits and are again + // out, this stream is actually prematurely terminated. + return -1; + } + } else { + stbi__fill_bits(a); + } + } + b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; + if (b) { + s = b >> 9; + a->code_buffer >>= s; + a->num_bits -= s; + return b & 511; + } + return stbi__zhuffman_decode_slowpath(a, z); +} + +static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room for n bytes +{ + char *q; + unsigned int cur, limit, old_limit; + z->zout = zout; + if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG"); + cur = (unsigned int) (z->zout - z->zout_start); + limit = old_limit = (unsigned) (z->zout_end - z->zout_start); + if (UINT_MAX - cur < (unsigned) n) return stbi__err("outofmem", "Out of memory"); + while (cur + n > limit) { + if(limit > UINT_MAX / 2) return stbi__err("outofmem", "Out of memory"); + limit *= 2; + } + q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); + STBI_NOTUSED(old_limit); + if (q == NULL) return stbi__err("outofmem", "Out of memory"); + z->zout_start = q; + z->zout = q + cur; + z->zout_end = q + limit; + return 1; +} + +static const int stbi__zlength_base[31] = { + 3,4,5,6,7,8,9,10,11,13, + 15,17,19,23,27,31,35,43,51,59, + 67,83,99,115,131,163,195,227,258,0,0 }; + +static const int stbi__zlength_extra[31]= +{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; + +static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, +257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0}; + +static const int stbi__zdist_extra[32] = +{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}; + +static int stbi__parse_huffman_block(stbi__zbuf *a) +{ + char *zout = a->zout; + for(;;) { + int z = stbi__zhuffman_decode(a, &a->z_length); + if (z < 256) { + if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes + if (zout >= a->zout_end) { + if (!stbi__zexpand(a, zout, 1)) return 0; + zout = a->zout; + } + *zout++ = (char) z; + } else { + stbi_uc *p; + int len,dist; + if (z == 256) { + a->zout = zout; + if (a->hit_zeof_once && a->num_bits < 16) { + // The first time we hit zeof, we inserted 16 extra zero bits into our bit + // buffer so the decoder can just do its speculative decoding. But if we + // actually consumed any of those bits (which is the case when num_bits < 16), + // the stream actually read past the end so it is malformed. + return stbi__err("unexpected end","Corrupt PNG"); + } + return 1; + } + if (z >= 286) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, length codes 286 and 287 must not appear in compressed data + z -= 257; + len = stbi__zlength_base[z]; + if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]); + z = stbi__zhuffman_decode(a, &a->z_distance); + if (z < 0 || z >= 30) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, distance codes 30 and 31 must not appear in compressed data + dist = stbi__zdist_base[z]; + if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]); + if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG"); + if (len > a->zout_end - zout) { + if (!stbi__zexpand(a, zout, len)) return 0; + zout = a->zout; + } + p = (stbi_uc *) (zout - dist); + if (dist == 1) { // run of one byte; common in images. + stbi_uc v = *p; + if (len) { do *zout++ = v; while (--len); } + } else { + if (len) { do *zout++ = *p++; while (--len); } + } + } + } +} + +static int stbi__compute_huffman_codes(stbi__zbuf *a) +{ + static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; + stbi__zhuffman z_codelength; + stbi_uc lencodes[286+32+137];//padding for maximum single op + stbi_uc codelength_sizes[19]; + int i,n; + + int hlit = stbi__zreceive(a,5) + 257; + int hdist = stbi__zreceive(a,5) + 1; + int hclen = stbi__zreceive(a,4) + 4; + int ntot = hlit + hdist; + + memset(codelength_sizes, 0, sizeof(codelength_sizes)); + for (i=0; i < hclen; ++i) { + int s = stbi__zreceive(a,3); + codelength_sizes[length_dezigzag[i]] = (stbi_uc) s; + } + if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; + + n = 0; + while (n < ntot) { + int c = stbi__zhuffman_decode(a, &z_codelength); + if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); + if (c < 16) + lencodes[n++] = (stbi_uc) c; + else { + stbi_uc fill = 0; + if (c == 16) { + c = stbi__zreceive(a,2)+3; + if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); + fill = lencodes[n-1]; + } else if (c == 17) { + c = stbi__zreceive(a,3)+3; + } else if (c == 18) { + c = stbi__zreceive(a,7)+11; + } else { + return stbi__err("bad codelengths", "Corrupt PNG"); + } + if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG"); + memset(lencodes+n, fill, c); + n += c; + } + } + if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG"); + if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0; + return 1; +} + +static int stbi__parse_uncompressed_block(stbi__zbuf *a) +{ + stbi_uc header[4]; + int len,nlen,k; + if (a->num_bits & 7) + stbi__zreceive(a, a->num_bits & 7); // discard + // drain the bit-packed data into header + k = 0; + while (a->num_bits > 0) { + header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check + a->code_buffer >>= 8; + a->num_bits -= 8; + } + if (a->num_bits < 0) return stbi__err("zlib corrupt","Corrupt PNG"); + // now fill header the normal way + while (k < 4) + header[k++] = stbi__zget8(a); + len = header[1] * 256 + header[0]; + nlen = header[3] * 256 + header[2]; + if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG"); + if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG"); + if (a->zout + len > a->zout_end) + if (!stbi__zexpand(a, a->zout, len)) return 0; + memcpy(a->zout, a->zbuffer, len); + a->zbuffer += len; + a->zout += len; + return 1; +} + +static int stbi__parse_zlib_header(stbi__zbuf *a) +{ + int cmf = stbi__zget8(a); + int cm = cmf & 15; + /* int cinfo = cmf >> 4; */ + int flg = stbi__zget8(a); + if (stbi__zeof(a)) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec + if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec + if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png + if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png + // window = 1 << (8 + cinfo)... but who cares, we fully buffer output + return 1; +} + +static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] = +{ + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, + 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8 +}; +static const stbi_uc stbi__zdefault_distance[32] = +{ + 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5 +}; +/* +Init algorithm: +{ + int i; // use <= to match clearly with spec + for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; + for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; + for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; + for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; + + for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; +} +*/ + +static int stbi__parse_zlib(stbi__zbuf *a, int parse_header) +{ + int final, type; + if (parse_header) + if (!stbi__parse_zlib_header(a)) return 0; + a->num_bits = 0; + a->code_buffer = 0; + a->hit_zeof_once = 0; + do { + final = stbi__zreceive(a,1); + type = stbi__zreceive(a,2); + if (type == 0) { + if (!stbi__parse_uncompressed_block(a)) return 0; + } else if (type == 3) { + return 0; + } else { + if (type == 1) { + // use fixed code lengths + if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , STBI__ZNSYMS)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; + } else { + if (!stbi__compute_huffman_codes(a)) return 0; + } + if (!stbi__parse_huffman_block(a)) return 0; + } + } while (!final); + return 1; +} + +static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header) +{ + a->zout_start = obuf; + a->zout = obuf; + a->zout_end = obuf + olen; + a->z_expandable = exp; + + return stbi__parse_zlib(a, parse_header); +} + +STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(initial_size); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen) +{ + return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); +} + +STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(initial_size); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen) +{ + stbi__zbuf a; + a.zbuffer = (stbi_uc *) ibuffer; + a.zbuffer_end = (stbi_uc *) ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) + return (int) (a.zout - a.zout_start); + else + return -1; +} + +STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(16384); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer+len; + if (stbi__do_zlib(&a, p, 16384, 1, 0)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen) +{ + stbi__zbuf a; + a.zbuffer = (stbi_uc *) ibuffer; + a.zbuffer_end = (stbi_uc *) ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) + return (int) (a.zout - a.zout_start); + else + return -1; +} +#endif + +// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 +// simple implementation +// - only 8-bit samples +// - no CRC checking +// - allocates lots of intermediate memory +// - avoids problem of streaming data between subsystems +// - avoids explicit window management +// performance +// - uses stb_zlib, a PD zlib implementation with fast huffman decoding + +#ifndef STBI_NO_PNG +typedef struct +{ + stbi__uint32 length; + stbi__uint32 type; +} stbi__pngchunk; + +static stbi__pngchunk stbi__get_chunk_header(stbi__context *s) +{ + stbi__pngchunk c; + c.length = stbi__get32be(s); + c.type = stbi__get32be(s); + return c; +} + +static int stbi__check_png_header(stbi__context *s) +{ + static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; + int i; + for (i=0; i < 8; ++i) + if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG"); + return 1; +} + +typedef struct +{ + stbi__context *s; + stbi_uc *idata, *expanded, *out; + int depth; +} stbi__png; + + +enum { + STBI__F_none=0, + STBI__F_sub=1, + STBI__F_up=2, + STBI__F_avg=3, + STBI__F_paeth=4, + // synthetic filter used for first scanline to avoid needing a dummy row of 0s + STBI__F_avg_first +}; + +static stbi_uc first_row_filter[5] = +{ + STBI__F_none, + STBI__F_sub, + STBI__F_none, + STBI__F_avg_first, + STBI__F_sub // Paeth with b=c=0 turns out to be equivalent to sub +}; + +static int stbi__paeth(int a, int b, int c) +{ + // This formulation looks very different from the reference in the PNG spec, but is + // actually equivalent and has favorable data dependencies and admits straightforward + // generation of branch-free code, which helps performance significantly. + int thresh = c*3 - (a + b); + int lo = a < b ? a : b; + int hi = a < b ? b : a; + int t0 = (hi <= thresh) ? lo : c; + int t1 = (thresh <= lo) ? hi : t0; + return t1; +} + +static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; + +// adds an extra all-255 alpha channel +// dest == src is legal +// img_n must be 1 or 3 +static void stbi__create_png_alpha_expand8(stbi_uc *dest, stbi_uc *src, stbi__uint32 x, int img_n) +{ + int i; + // must process data backwards since we allow dest==src + if (img_n == 1) { + for (i=x-1; i >= 0; --i) { + dest[i*2+1] = 255; + dest[i*2+0] = src[i]; + } + } else { + STBI_ASSERT(img_n == 3); + for (i=x-1; i >= 0; --i) { + dest[i*4+3] = 255; + dest[i*4+2] = src[i*3+2]; + dest[i*4+1] = src[i*3+1]; + dest[i*4+0] = src[i*3+0]; + } + } +} + +// create the png data from post-deflated data +static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) +{ + int bytes = (depth == 16 ? 2 : 1); + stbi__context *s = a->s; + stbi__uint32 i,j,stride = x*out_n*bytes; + stbi__uint32 img_len, img_width_bytes; + stbi_uc *filter_buf; + int all_ok = 1; + int k; + int img_n = s->img_n; // copy it into a local for later + + int output_bytes = out_n*bytes; + int filter_bytes = img_n*bytes; + int width = x; + + STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1); + a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into + if (!a->out) return stbi__err("outofmem", "Out of memory"); + + // note: error exits here don't need to clean up a->out individually, + // stbi__do_png always does on error. + if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG"); + img_width_bytes = (((img_n * x * depth) + 7) >> 3); + if (!stbi__mad2sizes_valid(img_width_bytes, y, img_width_bytes)) return stbi__err("too large", "Corrupt PNG"); + img_len = (img_width_bytes + 1) * y; + + // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, + // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), + // so just check for raw_len < img_len always. + if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG"); + + // Allocate two scan lines worth of filter workspace buffer. + filter_buf = (stbi_uc *) stbi__malloc_mad2(img_width_bytes, 2, 0); + if (!filter_buf) return stbi__err("outofmem", "Out of memory"); + + // Filtering for low-bit-depth images + if (depth < 8) { + filter_bytes = 1; + width = img_width_bytes; + } + + for (j=0; j < y; ++j) { + // cur/prior filter buffers alternate + stbi_uc *cur = filter_buf + (j & 1)*img_width_bytes; + stbi_uc *prior = filter_buf + (~j & 1)*img_width_bytes; + stbi_uc *dest = a->out + stride*j; + int nk = width * filter_bytes; + int filter = *raw++; + + // check filter type + if (filter > 4) { + all_ok = stbi__err("invalid filter","Corrupt PNG"); + break; + } + + // if first row, use special filter that doesn't sample previous row + if (j == 0) filter = first_row_filter[filter]; + + // perform actual filtering + switch (filter) { + case STBI__F_none: + memcpy(cur, raw, nk); + break; + case STBI__F_sub: + memcpy(cur, raw, filter_bytes); + for (k = filter_bytes; k < nk; ++k) + cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); + break; + case STBI__F_up: + for (k = 0; k < nk; ++k) + cur[k] = STBI__BYTECAST(raw[k] + prior[k]); + break; + case STBI__F_avg: + for (k = 0; k < filter_bytes; ++k) + cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); + for (k = filter_bytes; k < nk; ++k) + cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); + break; + case STBI__F_paeth: + for (k = 0; k < filter_bytes; ++k) + cur[k] = STBI__BYTECAST(raw[k] + prior[k]); // prior[k] == stbi__paeth(0,prior[k],0) + for (k = filter_bytes; k < nk; ++k) + cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes], prior[k], prior[k-filter_bytes])); + break; + case STBI__F_avg_first: + memcpy(cur, raw, filter_bytes); + for (k = filter_bytes; k < nk; ++k) + cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); + break; + } + + raw += nk; + + // expand decoded bits in cur to dest, also adding an extra alpha channel if desired + if (depth < 8) { + stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range + stbi_uc *in = cur; + stbi_uc *out = dest; + stbi_uc inb = 0; + stbi__uint32 nsmp = x*img_n; + + // expand bits to bytes first + if (depth == 4) { + for (i=0; i < nsmp; ++i) { + if ((i & 1) == 0) inb = *in++; + *out++ = scale * (inb >> 4); + inb <<= 4; + } + } else if (depth == 2) { + for (i=0; i < nsmp; ++i) { + if ((i & 3) == 0) inb = *in++; + *out++ = scale * (inb >> 6); + inb <<= 2; + } + } else { + STBI_ASSERT(depth == 1); + for (i=0; i < nsmp; ++i) { + if ((i & 7) == 0) inb = *in++; + *out++ = scale * (inb >> 7); + inb <<= 1; + } + } + + // insert alpha=255 values if desired + if (img_n != out_n) + stbi__create_png_alpha_expand8(dest, dest, x, img_n); + } else if (depth == 8) { + if (img_n == out_n) + memcpy(dest, cur, x*img_n); + else + stbi__create_png_alpha_expand8(dest, cur, x, img_n); + } else if (depth == 16) { + // convert the image data from big-endian to platform-native + stbi__uint16 *dest16 = (stbi__uint16*)dest; + stbi__uint32 nsmp = x*img_n; + + if (img_n == out_n) { + for (i = 0; i < nsmp; ++i, ++dest16, cur += 2) + *dest16 = (cur[0] << 8) | cur[1]; + } else { + STBI_ASSERT(img_n+1 == out_n); + if (img_n == 1) { + for (i = 0; i < x; ++i, dest16 += 2, cur += 2) { + dest16[0] = (cur[0] << 8) | cur[1]; + dest16[1] = 0xffff; + } + } else { + STBI_ASSERT(img_n == 3); + for (i = 0; i < x; ++i, dest16 += 4, cur += 6) { + dest16[0] = (cur[0] << 8) | cur[1]; + dest16[1] = (cur[2] << 8) | cur[3]; + dest16[2] = (cur[4] << 8) | cur[5]; + dest16[3] = 0xffff; + } + } + } + } + } + + STBI_FREE(filter_buf); + if (!all_ok) return 0; + + return 1; +} + +static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) +{ + int bytes = (depth == 16 ? 2 : 1); + int out_bytes = out_n * bytes; + stbi_uc *final; + int p; + if (!interlaced) + return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); + + // de-interlacing + final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); + if (!final) return stbi__err("outofmem", "Out of memory"); + for (p=0; p < 7; ++p) { + int xorig[] = { 0,4,0,2,0,1,0 }; + int yorig[] = { 0,0,4,0,2,0,1 }; + int xspc[] = { 8,8,4,4,2,2,1 }; + int yspc[] = { 8,8,8,4,4,2,2 }; + int i,j,x,y; + // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 + x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p]; + y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p]; + if (x && y) { + stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; + if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { + STBI_FREE(final); + return 0; + } + for (j=0; j < y; ++j) { + for (i=0; i < x; ++i) { + int out_y = j*yspc[p]+yorig[p]; + int out_x = i*xspc[p]+xorig[p]; + memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes, + a->out + (j*x+i)*out_bytes, out_bytes); + } + } + STBI_FREE(a->out); + image_data += img_len; + image_data_len -= img_len; + } + } + a->out = final; + + return 1; +} + +static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc *p = z->out; + + // compute color-based transparency, assuming we've + // already got 255 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i=0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 255); + p += 2; + } + } else { + for (i=0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi__uint16 *p = (stbi__uint16*) z->out; + + // compute color-based transparency, assuming we've + // already got 65535 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i = 0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 65535); + p += 2; + } + } else { + for (i = 0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n) +{ + stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; + stbi_uc *p, *temp_out, *orig = a->out; + + p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0); + if (p == NULL) return stbi__err("outofmem", "Out of memory"); + + // between here and free(out) below, exitting would leak + temp_out = p; + + if (pal_img_n == 3) { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p += 3; + } + } else { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p[3] = palette[n+3]; + p += 4; + } + } + STBI_FREE(a->out); + a->out = temp_out; + + STBI_NOTUSED(len); + + return 1; +} + +static int stbi__unpremultiply_on_load_global = 0; +static int stbi__de_iphone_flag_global = 0; + +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) +{ + stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) +{ + stbi__de_iphone_flag_global = flag_true_if_should_convert; +} + +#ifndef STBI_THREAD_LOCAL +#define stbi__unpremultiply_on_load stbi__unpremultiply_on_load_global +#define stbi__de_iphone_flag stbi__de_iphone_flag_global +#else +static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set; +static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set; + +STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply) +{ + stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply; + stbi__unpremultiply_on_load_set = 1; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert) +{ + stbi__de_iphone_flag_local = flag_true_if_should_convert; + stbi__de_iphone_flag_set = 1; +} + +#define stbi__unpremultiply_on_load (stbi__unpremultiply_on_load_set \ + ? stbi__unpremultiply_on_load_local \ + : stbi__unpremultiply_on_load_global) +#define stbi__de_iphone_flag (stbi__de_iphone_flag_set \ + ? stbi__de_iphone_flag_local \ + : stbi__de_iphone_flag_global) +#endif // STBI_THREAD_LOCAL + +static void stbi__de_iphone(stbi__png *z) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc *p = z->out; + + if (s->img_out_n == 3) { // convert bgr to rgb + for (i=0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 3; + } + } else { + STBI_ASSERT(s->img_out_n == 4); + if (stbi__unpremultiply_on_load) { + // convert bgr to rgb and unpremultiply + for (i=0; i < pixel_count; ++i) { + stbi_uc a = p[3]; + stbi_uc t = p[0]; + if (a) { + stbi_uc half = a / 2; + p[0] = (p[2] * 255 + half) / a; + p[1] = (p[1] * 255 + half) / a; + p[2] = ( t * 255 + half) / a; + } else { + p[0] = p[2]; + p[2] = t; + } + p += 4; + } + } else { + // convert bgr to rgb + for (i=0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 4; + } + } + } +} + +#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d)) + +static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) +{ + stbi_uc palette[1024], pal_img_n=0; + stbi_uc has_trans=0, tc[3]={0}; + stbi__uint16 tc16[3]; + stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0; + int first=1,k,interlace=0, color=0, is_iphone=0; + stbi__context *s = z->s; + + z->expanded = NULL; + z->idata = NULL; + z->out = NULL; + + if (!stbi__check_png_header(s)) return 0; + + if (scan == STBI__SCAN_type) return 1; + + for (;;) { + stbi__pngchunk c = stbi__get_chunk_header(s); + switch (c.type) { + case STBI__PNG_TYPE('C','g','B','I'): + is_iphone = 1; + stbi__skip(s, c.length); + break; + case STBI__PNG_TYPE('I','H','D','R'): { + int comp,filter; + if (!first) return stbi__err("multiple IHDR","Corrupt PNG"); + first = 0; + if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG"); + s->img_x = stbi__get32be(s); + s->img_y = stbi__get32be(s); + if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); + z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only"); + color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG"); + if (color == 3 && z->depth == 16) return stbi__err("bad ctype","Corrupt PNG"); + if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG"); + comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG"); + filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG"); + interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG"); + if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG"); + if (!pal_img_n) { + s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); + if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); + } else { + // if paletted, then pal_n is our final components, and + // img_n is # components to decompress/filter. + s->img_n = 1; + if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG"); + } + // even with SCAN_header, have to scan to see if we have a tRNS + break; + } + + case STBI__PNG_TYPE('P','L','T','E'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG"); + pal_len = c.length / 3; + if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG"); + for (i=0; i < pal_len; ++i) { + palette[i*4+0] = stbi__get8(s); + palette[i*4+1] = stbi__get8(s); + palette[i*4+2] = stbi__get8(s); + palette[i*4+3] = 255; + } + break; + } + + case STBI__PNG_TYPE('t','R','N','S'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG"); + if (pal_img_n) { + if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; } + if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG"); + if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG"); + pal_img_n = 4; + for (i=0; i < c.length; ++i) + palette[i*4+3] = stbi__get8(s); + } else { + if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG"); + if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG"); + has_trans = 1; + // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now. + if (scan == STBI__SCAN_header) { ++s->img_n; return 1; } + if (z->depth == 16) { + for (k = 0; k < s->img_n && k < 3; ++k) // extra loop test to suppress false GCC warning + tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is + } else { + for (k = 0; k < s->img_n && k < 3; ++k) + tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger + } + } + break; + } + + case STBI__PNG_TYPE('I','D','A','T'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG"); + if (scan == STBI__SCAN_header) { + // header scan definitely stops at first IDAT + if (pal_img_n) + s->img_n = pal_img_n; + return 1; + } + if (c.length > (1u << 30)) return stbi__err("IDAT size limit", "IDAT section larger than 2^30 bytes"); + if ((int)(ioff + c.length) < (int)ioff) return 0; + if (ioff + c.length > idata_limit) { + stbi__uint32 idata_limit_old = idata_limit; + stbi_uc *p; + if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; + while (ioff + c.length > idata_limit) + idata_limit *= 2; + STBI_NOTUSED(idata_limit_old); + p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); + z->idata = p; + } + if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG"); + ioff += c.length; + break; + } + + case STBI__PNG_TYPE('I','E','N','D'): { + stbi__uint32 raw_len, bpl; + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (scan != STBI__SCAN_load) return 1; + if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG"); + // initial guess for decoded data size to avoid unnecessary reallocs + bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component + raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; + z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone); + if (z->expanded == NULL) return 0; // zlib should set error + STBI_FREE(z->idata); z->idata = NULL; + if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans) + s->img_out_n = s->img_n+1; + else + s->img_out_n = s->img_n; + if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0; + if (has_trans) { + if (z->depth == 16) { + if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0; + } else { + if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; + } + } + if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) + stbi__de_iphone(z); + if (pal_img_n) { + // pal_img_n == 3 or 4 + s->img_n = pal_img_n; // record the actual colors we had + s->img_out_n = pal_img_n; + if (req_comp >= 3) s->img_out_n = req_comp; + if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) + return 0; + } else if (has_trans) { + // non-paletted image with tRNS -> source image has (constant) alpha + ++s->img_n; + } + STBI_FREE(z->expanded); z->expanded = NULL; + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + return 1; + } + + default: + // if critical, fail + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if ((c.type & (1 << 29)) == 0) { + #ifndef STBI_NO_FAILURE_STRINGS + // not threadsafe + static char invalid_chunk[] = "XXXX PNG chunk not known"; + invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); + invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); + invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); + invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); + #endif + return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); + } + stbi__skip(s, c.length); + break; + } + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + } +} + +static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri) +{ + void *result=NULL; + if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); + if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { + if (p->depth <= 8) + ri->bits_per_channel = 8; + else if (p->depth == 16) + ri->bits_per_channel = 16; + else + return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth"); + result = p->out; + p->out = NULL; + if (req_comp && req_comp != p->s->img_out_n) { + if (ri->bits_per_channel == 8) + result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + else + result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + p->s->img_out_n = req_comp; + if (result == NULL) return result; + } + *x = p->s->img_x; + *y = p->s->img_y; + if (n) *n = p->s->img_n; + } + STBI_FREE(p->out); p->out = NULL; + STBI_FREE(p->expanded); p->expanded = NULL; + STBI_FREE(p->idata); p->idata = NULL; + + return result; +} + +static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi__png p; + p.s = s; + return stbi__do_png(&p, x,y,comp,req_comp, ri); +} + +static int stbi__png_test(stbi__context *s) +{ + int r; + r = stbi__check_png_header(s); + stbi__rewind(s); + return r; +} + +static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp) +{ + if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { + stbi__rewind( p->s ); + return 0; + } + if (x) *x = p->s->img_x; + if (y) *y = p->s->img_y; + if (comp) *comp = p->s->img_n; + return 1; +} + +static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp) +{ + stbi__png p; + p.s = s; + return stbi__png_info_raw(&p, x, y, comp); +} + +static int stbi__png_is16(stbi__context *s) +{ + stbi__png p; + p.s = s; + if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) + return 0; + if (p.depth != 16) { + stbi__rewind(p.s); + return 0; + } + return 1; +} +#endif + +// Microsoft/Windows BMP image + +#ifndef STBI_NO_BMP +static int stbi__bmp_test_raw(stbi__context *s) +{ + int r; + int sz; + if (stbi__get8(s) != 'B') return 0; + if (stbi__get8(s) != 'M') return 0; + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + stbi__get32le(s); // discard data offset + sz = stbi__get32le(s); + r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); + return r; +} + +static int stbi__bmp_test(stbi__context *s) +{ + int r = stbi__bmp_test_raw(s); + stbi__rewind(s); + return r; +} + + +// returns 0..31 for the highest set bit +static int stbi__high_bit(unsigned int z) +{ + int n=0; + if (z == 0) return -1; + if (z >= 0x10000) { n += 16; z >>= 16; } + if (z >= 0x00100) { n += 8; z >>= 8; } + if (z >= 0x00010) { n += 4; z >>= 4; } + if (z >= 0x00004) { n += 2; z >>= 2; } + if (z >= 0x00002) { n += 1;/* >>= 1;*/ } + return n; +} + +static int stbi__bitcount(unsigned int a) +{ + a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 + a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 + a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits + a = (a + (a >> 8)); // max 16 per 8 bits + a = (a + (a >> 16)); // max 32 per 8 bits + return a & 0xff; +} + +// extract an arbitrarily-aligned N-bit value (N=bits) +// from v, and then make it 8-bits long and fractionally +// extend it to full full range. +static int stbi__shiftsigned(unsigned int v, int shift, int bits) +{ + static unsigned int mul_table[9] = { + 0, + 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/, + 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/, + }; + static unsigned int shift_table[9] = { + 0, 0,0,1,0,2,4,6,0, + }; + if (shift < 0) + v <<= -shift; + else + v >>= shift; + STBI_ASSERT(v < 256); + v >>= (8-bits); + STBI_ASSERT(bits >= 0 && bits <= 8); + return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits]; +} + +typedef struct +{ + int bpp, offset, hsz; + unsigned int mr,mg,mb,ma, all_a; + int extra_read; +} stbi__bmp_data; + +static int stbi__bmp_set_mask_defaults(stbi__bmp_data *info, int compress) +{ + // BI_BITFIELDS specifies masks explicitly, don't override + if (compress == 3) + return 1; + + if (compress == 0) { + if (info->bpp == 16) { + info->mr = 31u << 10; + info->mg = 31u << 5; + info->mb = 31u << 0; + } else if (info->bpp == 32) { + info->mr = 0xffu << 16; + info->mg = 0xffu << 8; + info->mb = 0xffu << 0; + info->ma = 0xffu << 24; + info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 + } else { + // otherwise, use defaults, which is all-0 + info->mr = info->mg = info->mb = info->ma = 0; + } + return 1; + } + return 0; // error +} + +static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) +{ + int hsz; + if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + info->offset = stbi__get32le(s); + info->hsz = hsz = stbi__get32le(s); + info->mr = info->mg = info->mb = info->ma = 0; + info->extra_read = 14; + + if (info->offset < 0) return stbi__errpuc("bad BMP", "bad BMP"); + + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = stbi__get16le(s); + s->img_y = stbi__get16le(s); + } else { + s->img_x = stbi__get32le(s); + s->img_y = stbi__get32le(s); + } + if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); + info->bpp = stbi__get16le(s); + if (hsz != 12) { + int compress = stbi__get32le(s); + if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); + if (compress >= 4) return stbi__errpuc("BMP JPEG/PNG", "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes + if (compress == 3 && info->bpp != 16 && info->bpp != 32) return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel + stbi__get32le(s); // discard sizeof + stbi__get32le(s); // discard hres + stbi__get32le(s); // discard vres + stbi__get32le(s); // discard colorsused + stbi__get32le(s); // discard max important + if (hsz == 40 || hsz == 56) { + if (hsz == 56) { + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + } + if (info->bpp == 16 || info->bpp == 32) { + if (compress == 0) { + stbi__bmp_set_mask_defaults(info, compress); + } else if (compress == 3) { + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->extra_read += 12; + // not documented, but generated by photoshop and handled by mspaint + if (info->mr == info->mg && info->mg == info->mb) { + // ?!?!? + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else { + // V4/V5 header + int i; + if (hsz != 108 && hsz != 124) + return stbi__errpuc("bad BMP", "bad BMP"); + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->ma = stbi__get32le(s); + if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs + stbi__bmp_set_mask_defaults(info, compress); + stbi__get32le(s); // discard color space + for (i=0; i < 12; ++i) + stbi__get32le(s); // discard color space parameters + if (hsz == 124) { + stbi__get32le(s); // discard rendering intent + stbi__get32le(s); // discard offset of profile data + stbi__get32le(s); // discard size of profile data + stbi__get32le(s); // discard reserved + } + } + } + return (void *) 1; +} + + +static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi_uc *out; + unsigned int mr=0,mg=0,mb=0,ma=0, all_a; + stbi_uc pal[256][4]; + int psize=0,i,j,width; + int flip_vertically, pad, target; + stbi__bmp_data info; + STBI_NOTUSED(ri); + + info.all_a = 255; + if (stbi__bmp_parse_header(s, &info) == NULL) + return NULL; // error code already set + + flip_vertically = ((int) s->img_y) > 0; + s->img_y = abs((int) s->img_y); + + if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + + mr = info.mr; + mg = info.mg; + mb = info.mb; + ma = info.ma; + all_a = info.all_a; + + if (info.hsz == 12) { + if (info.bpp < 24) + psize = (info.offset - info.extra_read - 24) / 3; + } else { + if (info.bpp < 16) + psize = (info.offset - info.extra_read - info.hsz) >> 2; + } + if (psize == 0) { + // accept some number of extra bytes after the header, but if the offset points either to before + // the header ends or implies a large amount of extra data, reject the file as malformed + int bytes_read_so_far = s->callback_already_read + (int)(s->img_buffer - s->img_buffer_original); + int header_limit = 1024; // max we actually read is below 256 bytes currently. + int extra_data_limit = 256*4; // what ordinarily goes here is a palette; 256 entries*4 bytes is its max size. + if (bytes_read_so_far <= 0 || bytes_read_so_far > header_limit) { + return stbi__errpuc("bad header", "Corrupt BMP"); + } + // we established that bytes_read_so_far is positive and sensible. + // the first half of this test rejects offsets that are either too small positives, or + // negative, and guarantees that info.offset >= bytes_read_so_far > 0. this in turn + // ensures the number computed in the second half of the test can't overflow. + if (info.offset < bytes_read_so_far || info.offset - bytes_read_so_far > extra_data_limit) { + return stbi__errpuc("bad offset", "Corrupt BMP"); + } else { + stbi__skip(s, info.offset - bytes_read_so_far); + } + } + + if (info.bpp == 24 && ma == 0xff000000) + s->img_n = 3; + else + s->img_n = ma ? 4 : 3; + if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 + target = req_comp; + else + target = s->img_n; // if they want monochrome, we'll post-convert + + // sanity-check size + if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) + return stbi__errpuc("too large", "Corrupt BMP"); + + out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + if (info.bpp < 16) { + int z=0; + if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } + for (i=0; i < psize; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + if (info.hsz != 12) stbi__get8(s); + pal[i][3] = 255; + } + stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); + if (info.bpp == 1) width = (s->img_x + 7) >> 3; + else if (info.bpp == 4) width = (s->img_x + 1) >> 1; + else if (info.bpp == 8) width = s->img_x; + else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } + pad = (-width)&3; + if (info.bpp == 1) { + for (j=0; j < (int) s->img_y; ++j) { + int bit_offset = 7, v = stbi__get8(s); + for (i=0; i < (int) s->img_x; ++i) { + int color = (v>>bit_offset)&0x1; + out[z++] = pal[color][0]; + out[z++] = pal[color][1]; + out[z++] = pal[color][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; + if((--bit_offset) < 0) { + bit_offset = 7; + v = stbi__get8(s); + } + } + stbi__skip(s, pad); + } + } else { + for (j=0; j < (int) s->img_y; ++j) { + for (i=0; i < (int) s->img_x; i += 2) { + int v=stbi__get8(s),v2=0; + if (info.bpp == 4) { + v2 = v & 15; + v >>= 4; + } + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; + v = (info.bpp == 8) ? stbi__get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + } + stbi__skip(s, pad); + } + } + } else { + int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; + int z = 0; + int easy=0; + stbi__skip(s, info.offset - info.extra_read - info.hsz); + if (info.bpp == 24) width = 3 * s->img_x; + else if (info.bpp == 16) width = 2*s->img_x; + else /* bpp = 32 and pad = 0 */ width=0; + pad = (-width) & 3; + if (info.bpp == 24) { + easy = 1; + } else if (info.bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } + if (!easy) { + if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } + // right shift amt to put high bit in position #7 + rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr); + gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg); + bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb); + ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma); + if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } + } + for (j=0; j < (int) s->img_y; ++j) { + if (easy) { + for (i=0; i < (int) s->img_x; ++i) { + unsigned char a; + out[z+2] = stbi__get8(s); + out[z+1] = stbi__get8(s); + out[z+0] = stbi__get8(s); + z += 3; + a = (easy == 2 ? stbi__get8(s) : 255); + all_a |= a; + if (target == 4) out[z++] = a; + } + } else { + int bpp = info.bpp; + for (i=0; i < (int) s->img_x; ++i) { + stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s)); + unsigned int a; + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); + a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); + all_a |= a; + if (target == 4) out[z++] = STBI__BYTECAST(a); + } + } + stbi__skip(s, pad); + } + } + + // if alpha channel is all 0s, replace with all 255s + if (target == 4 && all_a == 0) + for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4) + out[i] = 255; + + if (flip_vertically) { + stbi_uc t; + for (j=0; j < (int) s->img_y>>1; ++j) { + stbi_uc *p1 = out + j *s->img_x*target; + stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target; + for (i=0; i < (int) s->img_x*target; ++i) { + t = p1[i]; p1[i] = p2[i]; p2[i] = t; + } + } + } + + if (req_comp && req_comp != target) { + out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + + *x = s->img_x; + *y = s->img_y; + if (comp) *comp = s->img_n; + return out; +} +#endif + +// Targa Truevision - TGA +// by Jonathan Dummer +#ifndef STBI_NO_TGA +// returns STBI_rgb or whatever, 0 on error +static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) +{ + // only RGB or RGBA (incl. 16bit) or grey allowed + if (is_rgb16) *is_rgb16 = 0; + switch(bits_per_pixel) { + case 8: return STBI_grey; + case 16: if(is_grey) return STBI_grey_alpha; + // fallthrough + case 15: if(is_rgb16) *is_rgb16 = 1; + return STBI_rgb; + case 24: // fallthrough + case 32: return bits_per_pixel/8; + default: return 0; + } +} + +static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp) +{ + int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; + int sz, tga_colormap_type; + stbi__get8(s); // discard Offset + tga_colormap_type = stbi__get8(s); // colormap type + if( tga_colormap_type > 1 ) { + stbi__rewind(s); + return 0; // only RGB or indexed allowed + } + tga_image_type = stbi__get8(s); // image type + if ( tga_colormap_type == 1 ) { // colormapped (paletted) image + if (tga_image_type != 1 && tga_image_type != 9) { + stbi__rewind(s); + return 0; + } + stbi__skip(s,4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) { + stbi__rewind(s); + return 0; + } + stbi__skip(s,4); // skip image x and y origin + tga_colormap_bpp = sz; + } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE + if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) { + stbi__rewind(s); + return 0; // only RGB or grey allowed, +/- RLE + } + stbi__skip(s,9); // skip colormap specification and image x/y origin + tga_colormap_bpp = 0; + } + tga_w = stbi__get16le(s); + if( tga_w < 1 ) { + stbi__rewind(s); + return 0; // test width + } + tga_h = stbi__get16le(s); + if( tga_h < 1 ) { + stbi__rewind(s); + return 0; // test height + } + tga_bits_per_pixel = stbi__get8(s); // bits per pixel + stbi__get8(s); // ignore alpha bits + if (tga_colormap_bpp != 0) { + if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { + // when using a colormap, tga_bits_per_pixel is the size of the indexes + // I don't think anything but 8 or 16bit indexes makes sense + stbi__rewind(s); + return 0; + } + tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); + } else { + tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); + } + if(!tga_comp) { + stbi__rewind(s); + return 0; + } + if (x) *x = tga_w; + if (y) *y = tga_h; + if (comp) *comp = tga_comp; + return 1; // seems to have passed everything +} + +static int stbi__tga_test(stbi__context *s) +{ + int res = 0; + int sz, tga_color_type; + stbi__get8(s); // discard Offset + tga_color_type = stbi__get8(s); // color type + if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed + sz = stbi__get8(s); // image type + if ( tga_color_type == 1 ) { // colormapped (paletted) image + if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 + stbi__skip(s,4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; + stbi__skip(s,4); // skip image x and y origin + } else { // "normal" image w/o colormap + if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE + stbi__skip(s,9); // skip colormap specification and image x/y origin + } + if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width + if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height + sz = stbi__get8(s); // bits per pixel + if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; + + res = 1; // if we got this far, everything's good and we can return 1 instead of 0 + +errorEnd: + stbi__rewind(s); + return res; +} + +// read 16bit value and convert to 24bit RGB +static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out) +{ + stbi__uint16 px = (stbi__uint16)stbi__get16le(s); + stbi__uint16 fiveBitMask = 31; + // we have 3 channels with 5bits each + int r = (px >> 10) & fiveBitMask; + int g = (px >> 5) & fiveBitMask; + int b = px & fiveBitMask; + // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later + out[0] = (stbi_uc)((r * 255)/31); + out[1] = (stbi_uc)((g * 255)/31); + out[2] = (stbi_uc)((b * 255)/31); + + // some people claim that the most significant bit might be used for alpha + // (possibly if an alpha-bit is set in the "image descriptor byte") + // but that only made 16bit test images completely translucent.. + // so let's treat all 15 and 16bit TGAs as RGB with no alpha. +} + +static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + // read in the TGA header stuff + int tga_offset = stbi__get8(s); + int tga_indexed = stbi__get8(s); + int tga_image_type = stbi__get8(s); + int tga_is_RLE = 0; + int tga_palette_start = stbi__get16le(s); + int tga_palette_len = stbi__get16le(s); + int tga_palette_bits = stbi__get8(s); + int tga_x_origin = stbi__get16le(s); + int tga_y_origin = stbi__get16le(s); + int tga_width = stbi__get16le(s); + int tga_height = stbi__get16le(s); + int tga_bits_per_pixel = stbi__get8(s); + int tga_comp, tga_rgb16=0; + int tga_inverted = stbi__get8(s); + // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) + // image data + unsigned char *tga_data; + unsigned char *tga_palette = NULL; + int i, j; + unsigned char raw_data[4] = {0}; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; + STBI_NOTUSED(ri); + STBI_NOTUSED(tga_x_origin); // @TODO + STBI_NOTUSED(tga_y_origin); // @TODO + + if (tga_height > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + if (tga_width > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + + // do a tiny bit of precessing + if ( tga_image_type >= 8 ) + { + tga_image_type -= 8; + tga_is_RLE = 1; + } + tga_inverted = 1 - ((tga_inverted >> 5) & 1); + + // If I'm paletted, then I'll use the number of bits from the palette + if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); + else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); + + if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency + return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); + + // tga info + *x = tga_width; + *y = tga_height; + if (comp) *comp = tga_comp; + + if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) + return stbi__errpuc("too large", "Corrupt TGA"); + + tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); + if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); + + // skip to the data's starting position (offset usually = 0) + stbi__skip(s, tga_offset ); + + if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) { + for (i=0; i < tga_height; ++i) { + int row = tga_inverted ? tga_height -i - 1 : i; + stbi_uc *tga_row = tga_data + row*tga_width*tga_comp; + stbi__getn(s, tga_row, tga_width * tga_comp); + } + } else { + // do I need to load a palette? + if ( tga_indexed) + { + if (tga_palette_len == 0) { /* you have to have at least one entry! */ + STBI_FREE(tga_data); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + + // any data to skip? (offset usually = 0) + stbi__skip(s, tga_palette_start ); + // load the palette + tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); + if (!tga_palette) { + STBI_FREE(tga_data); + return stbi__errpuc("outofmem", "Out of memory"); + } + if (tga_rgb16) { + stbi_uc *pal_entry = tga_palette; + STBI_ASSERT(tga_comp == STBI_rgb); + for (i=0; i < tga_palette_len; ++i) { + stbi__tga_read_rgb16(s, pal_entry); + pal_entry += tga_comp; + } + } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { + STBI_FREE(tga_data); + STBI_FREE(tga_palette); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + } + // load the data + for (i=0; i < tga_width * tga_height; ++i) + { + // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? + if ( tga_is_RLE ) + { + if ( RLE_count == 0 ) + { + // yep, get the next byte as a RLE command + int RLE_cmd = stbi__get8(s); + RLE_count = 1 + (RLE_cmd & 127); + RLE_repeating = RLE_cmd >> 7; + read_next_pixel = 1; + } else if ( !RLE_repeating ) + { + read_next_pixel = 1; + } + } else + { + read_next_pixel = 1; + } + // OK, if I need to read a pixel, do it now + if ( read_next_pixel ) + { + // load however much data we did have + if ( tga_indexed ) + { + // read in index, then perform the lookup + int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); + if ( pal_idx >= tga_palette_len ) { + // invalid index + pal_idx = 0; + } + pal_idx *= tga_comp; + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = tga_palette[pal_idx+j]; + } + } else if(tga_rgb16) { + STBI_ASSERT(tga_comp == STBI_rgb); + stbi__tga_read_rgb16(s, raw_data); + } else { + // read in the data raw + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = stbi__get8(s); + } + } + // clear the reading flag for the next pixel + read_next_pixel = 0; + } // end of reading a pixel + + // copy data + for (j = 0; j < tga_comp; ++j) + tga_data[i*tga_comp+j] = raw_data[j]; + + // in case we're in RLE mode, keep counting down + --RLE_count; + } + // do I need to invert the image? + if ( tga_inverted ) + { + for (j = 0; j*2 < tga_height; ++j) + { + int index1 = j * tga_width * tga_comp; + int index2 = (tga_height - 1 - j) * tga_width * tga_comp; + for (i = tga_width * tga_comp; i > 0; --i) + { + unsigned char temp = tga_data[index1]; + tga_data[index1] = tga_data[index2]; + tga_data[index2] = temp; + ++index1; + ++index2; + } + } + } + // clear my palette, if I had one + if ( tga_palette != NULL ) + { + STBI_FREE( tga_palette ); + } + } + + // swap RGB - if the source data was RGB16, it already is in the right order + if (tga_comp >= 3 && !tga_rgb16) + { + unsigned char* tga_pixel = tga_data; + for (i=0; i < tga_width * tga_height; ++i) + { + unsigned char temp = tga_pixel[0]; + tga_pixel[0] = tga_pixel[2]; + tga_pixel[2] = temp; + tga_pixel += tga_comp; + } + } + + // convert to target component count + if (req_comp && req_comp != tga_comp) + tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); + + // the things I do to get rid of an error message, and yet keep + // Microsoft's C compilers happy... [8^( + tga_palette_start = tga_palette_len = tga_palette_bits = + tga_x_origin = tga_y_origin = 0; + STBI_NOTUSED(tga_palette_start); + // OK, done + return tga_data; +} +#endif + +// ************************************************************************************************* +// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context *s) +{ + int r = (stbi__get32be(s) == 0x38425053); + stbi__rewind(s); + return r; +} + +static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount) +{ + int count, nleft, len; + + count = 0; + while ((nleft = pixelCount - count) > 0) { + len = stbi__get8(s); + if (len == 128) { + // No-op. + } else if (len < 128) { + // Copy next len+1 bytes literally. + len++; + if (len > nleft) return 0; // corrupt data + count += len; + while (len) { + *p = stbi__get8(s); + p += 4; + len--; + } + } else if (len > 128) { + stbi_uc val; + // Next -len+1 bytes in the dest are replicated from next source byte. + // (Interpret len as a negative 8-bit int.) + len = 257 - len; + if (len > nleft) return 0; // corrupt data + val = stbi__get8(s); + count += len; + while (len) { + *p = val; + p += 4; + len--; + } + } + } + + return 1; +} + +static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc) +{ + int pixelCount; + int channelCount, compression; + int channel, i; + int bitdepth; + int w,h; + stbi_uc *out; + STBI_NOTUSED(ri); + + // Check identifier + if (stbi__get32be(s) != 0x38425053) // "8BPS" + return stbi__errpuc("not PSD", "Corrupt PSD image"); + + // Check file type version. + if (stbi__get16be(s) != 1) + return stbi__errpuc("wrong version", "Unsupported version of PSD image"); + + // Skip 6 reserved bytes. + stbi__skip(s, 6 ); + + // Read the number of channels (R, G, B, A, etc). + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) + return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); + + // Read the rows and columns of the image. + h = stbi__get32be(s); + w = stbi__get32be(s); + + if (h > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + if (w > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + + // Make sure the depth is 8 bits. + bitdepth = stbi__get16be(s); + if (bitdepth != 8 && bitdepth != 16) + return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); + + // Make sure the color mode is RGB. + // Valid options are: + // 0: Bitmap + // 1: Grayscale + // 2: Indexed color + // 3: RGB color + // 4: CMYK color + // 7: Multichannel + // 8: Duotone + // 9: Lab color + if (stbi__get16be(s) != 3) + return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); + + // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) + stbi__skip(s,stbi__get32be(s) ); + + // Skip the image resources. (resolution, pen tool paths, etc) + stbi__skip(s, stbi__get32be(s) ); + + // Skip the reserved data. + stbi__skip(s, stbi__get32be(s) ); + + // Find out if the data is compressed. + // Known values: + // 0: no compression + // 1: RLE compressed + compression = stbi__get16be(s); + if (compression > 1) + return stbi__errpuc("bad compression", "PSD has an unknown compression format"); + + // Check size + if (!stbi__mad3sizes_valid(4, w, h, 0)) + return stbi__errpuc("too large", "Corrupt PSD"); + + // Create the destination image. + + if (!compression && bitdepth == 16 && bpc == 16) { + out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0); + ri->bits_per_channel = 16; + } else + out = (stbi_uc *) stbi__malloc(4 * w*h); + + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + pixelCount = w*h; + + // Initialize the data to zero. + //memset( out, 0, pixelCount * 4 ); + + // Finally, the image data. + if (compression) { + // RLE as used by .PSD and .TIFF + // Loop until you get the number of unpacked bytes you are expecting: + // Read the next source byte into n. + // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. + // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. + // Else if n is 128, noop. + // Endloop + + // The RLE-compressed data is preceded by a 2-byte data count for each row in the data, + // which we're going to just skip. + stbi__skip(s, h * channelCount * 2 ); + + // Read the RLE data by channel. + for (channel = 0; channel < 4; channel++) { + stbi_uc *p; + + p = out+channel; + if (channel >= channelCount) { + // Fill this channel with default data. + for (i = 0; i < pixelCount; i++, p += 4) + *p = (channel == 3 ? 255 : 0); + } else { + // Read the RLE data. + if (!stbi__psd_decode_rle(s, p, pixelCount)) { + STBI_FREE(out); + return stbi__errpuc("corrupt", "bad RLE data"); + } + } + } + + } else { + // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) + // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. + + // Read the data by channel. + for (channel = 0; channel < 4; channel++) { + if (channel >= channelCount) { + // Fill this channel with default data. + if (bitdepth == 16 && bpc == 16) { + stbi__uint16 *q = ((stbi__uint16 *) out) + channel; + stbi__uint16 val = channel == 3 ? 65535 : 0; + for (i = 0; i < pixelCount; i++, q += 4) + *q = val; + } else { + stbi_uc *p = out+channel; + stbi_uc val = channel == 3 ? 255 : 0; + for (i = 0; i < pixelCount; i++, p += 4) + *p = val; + } + } else { + if (ri->bits_per_channel == 16) { // output bpc + stbi__uint16 *q = ((stbi__uint16 *) out) + channel; + for (i = 0; i < pixelCount; i++, q += 4) + *q = (stbi__uint16) stbi__get16be(s); + } else { + stbi_uc *p = out+channel; + if (bitdepth == 16) { // input bpc + for (i = 0; i < pixelCount; i++, p += 4) + *p = (stbi_uc) (stbi__get16be(s) >> 8); + } else { + for (i = 0; i < pixelCount; i++, p += 4) + *p = stbi__get8(s); + } + } + } + } + } + + // remove weird white matte from PSD + if (channelCount >= 4) { + if (ri->bits_per_channel == 16) { + for (i=0; i < w*h; ++i) { + stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i; + if (pixel[3] != 0 && pixel[3] != 65535) { + float a = pixel[3] / 65535.0f; + float ra = 1.0f / a; + float inv_a = 65535.0f * (1 - ra); + pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a); + pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a); + pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a); + } + } + } else { + for (i=0; i < w*h; ++i) { + unsigned char *pixel = out + 4*i; + if (pixel[3] != 0 && pixel[3] != 255) { + float a = pixel[3] / 255.0f; + float ra = 1.0f / a; + float inv_a = 255.0f * (1 - ra); + pixel[0] = (unsigned char) (pixel[0]*ra + inv_a); + pixel[1] = (unsigned char) (pixel[1]*ra + inv_a); + pixel[2] = (unsigned char) (pixel[2]*ra + inv_a); + } + } + } + } + + // convert to desired output format + if (req_comp && req_comp != 4) { + if (ri->bits_per_channel == 16) + out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h); + else + out = stbi__convert_format(out, 4, req_comp, w, h); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + + if (comp) *comp = 4; + *y = h; + *x = w; + + return out; +} +#endif + +// ************************************************************************************************* +// Softimage PIC loader +// by Tom Seddon +// +// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format +// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ + +#ifndef STBI_NO_PIC +static int stbi__pic_is4(stbi__context *s,const char *str) +{ + int i; + for (i=0; i<4; ++i) + if (stbi__get8(s) != (stbi_uc)str[i]) + return 0; + + return 1; +} + +static int stbi__pic_test_core(stbi__context *s) +{ + int i; + + if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) + return 0; + + for(i=0;i<84;++i) + stbi__get8(s); + + if (!stbi__pic_is4(s,"PICT")) + return 0; + + return 1; +} + +typedef struct +{ + stbi_uc size,type,channel; +} stbi__pic_packet; + +static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest) +{ + int mask=0x80, i; + + for (i=0; i<4; ++i, mask>>=1) { + if (channel & mask) { + if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short"); + dest[i]=stbi__get8(s); + } + } + + return dest; +} + +static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src) +{ + int mask=0x80,i; + + for (i=0;i<4; ++i, mask>>=1) + if (channel&mask) + dest[i]=src[i]; +} + +static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result) +{ + int act_comp=0,num_packets=0,y,chained; + stbi__pic_packet packets[10]; + + // this will (should...) cater for even some bizarre stuff like having data + // for the same channel in multiple packets. + do { + stbi__pic_packet *packet; + + if (num_packets==sizeof(packets)/sizeof(packets[0])) + return stbi__errpuc("bad format","too many packets"); + + packet = &packets[num_packets++]; + + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + + act_comp |= packet->channel; + + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)"); + if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp"); + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? + + for(y=0; ytype) { + default: + return stbi__errpuc("bad format","packet has bad compression type"); + + case 0: {//uncompressed + int x; + + for(x=0;xchannel,dest)) + return 0; + break; + } + + case 1://Pure RLE + { + int left=width, i; + + while (left>0) { + stbi_uc count,value[4]; + + count=stbi__get8(s); + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)"); + + if (count > left) + count = (stbi_uc) left; + + if (!stbi__readval(s,packet->channel,value)) return 0; + + for(i=0; ichannel,dest,value); + left -= count; + } + } + break; + + case 2: {//Mixed RLE + int left=width; + while (left>0) { + int count = stbi__get8(s), i; + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)"); + + if (count >= 128) { // Repeated + stbi_uc value[4]; + + if (count==128) + count = stbi__get16be(s); + else + count -= 127; + if (count > left) + return stbi__errpuc("bad file","scanline overrun"); + + if (!stbi__readval(s,packet->channel,value)) + return 0; + + for(i=0;ichannel,dest,value); + } else { // Raw + ++count; + if (count>left) return stbi__errpuc("bad file","scanline overrun"); + + for(i=0;ichannel,dest)) + return 0; + } + left-=count; + } + break; + } + } + } + } + + return result; +} + +static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri) +{ + stbi_uc *result; + int i, x,y, internal_comp; + STBI_NOTUSED(ri); + + if (!comp) comp = &internal_comp; + + for (i=0; i<92; ++i) + stbi__get8(s); + + x = stbi__get16be(s); + y = stbi__get16be(s); + + if (y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + if (x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)"); + if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode"); + + stbi__get32be(s); //skip `ratio' + stbi__get16be(s); //skip `fields' + stbi__get16be(s); //skip `pad' + + // intermediate buffer is RGBA + result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0); + if (!result) return stbi__errpuc("outofmem", "Out of memory"); + memset(result, 0xff, x*y*4); + + if (!stbi__pic_load_core(s,x,y,comp, result)) { + STBI_FREE(result); + result=0; + } + *px = x; + *py = y; + if (req_comp == 0) req_comp = *comp; + result=stbi__convert_format(result,4,req_comp,x,y); + + return result; +} + +static int stbi__pic_test(stbi__context *s) +{ + int r = stbi__pic_test_core(s); + stbi__rewind(s); + return r; +} +#endif + +// ************************************************************************************************* +// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb + +#ifndef STBI_NO_GIF +typedef struct +{ + stbi__int16 prefix; + stbi_uc first; + stbi_uc suffix; +} stbi__gif_lzw; + +typedef struct +{ + int w,h; + stbi_uc *out; // output buffer (always 4 components) + stbi_uc *background; // The current "background" as far as a gif is concerned + stbi_uc *history; + int flags, bgindex, ratio, transparent, eflags; + stbi_uc pal[256][4]; + stbi_uc lpal[256][4]; + stbi__gif_lzw codes[8192]; + stbi_uc *color_table; + int parse, step; + int lflags; + int start_x, start_y; + int max_x, max_y; + int cur_x, cur_y; + int line_size; + int delay; +} stbi__gif; + +static int stbi__gif_test_raw(stbi__context *s) +{ + int sz; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0; + sz = stbi__get8(s); + if (sz != '9' && sz != '7') return 0; + if (stbi__get8(s) != 'a') return 0; + return 1; +} + +static int stbi__gif_test(stbi__context *s) +{ + int r = stbi__gif_test_raw(s); + stbi__rewind(s); + return r; +} + +static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp) +{ + int i; + for (i=0; i < num_entries; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + pal[i][3] = transp == i ? 0 : 255; + } +} + +static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info) +{ + stbi_uc version; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') + return stbi__err("not GIF", "Corrupt GIF"); + + version = stbi__get8(s); + if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF"); + if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF"); + + stbi__g_failure_reason = ""; + g->w = stbi__get16le(s); + g->h = stbi__get16le(s); + g->flags = stbi__get8(s); + g->bgindex = stbi__get8(s); + g->ratio = stbi__get8(s); + g->transparent = -1; + + if (g->w > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); + if (g->h > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)"); + + if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments + + if (is_info) return 1; + + if (g->flags & 0x80) + stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1); + + return 1; +} + +static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp) +{ + stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif)); + if (!g) return stbi__err("outofmem", "Out of memory"); + if (!stbi__gif_header(s, g, comp, 1)) { + STBI_FREE(g); + stbi__rewind( s ); + return 0; + } + if (x) *x = g->w; + if (y) *y = g->h; + STBI_FREE(g); + return 1; +} + +static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) +{ + stbi_uc *p, *c; + int idx; + + // recurse to decode the prefixes, since the linked-list is backwards, + // and working backwards through an interleaved image would be nasty + if (g->codes[code].prefix >= 0) + stbi__out_gif_code(g, g->codes[code].prefix); + + if (g->cur_y >= g->max_y) return; + + idx = g->cur_x + g->cur_y; + p = &g->out[idx]; + g->history[idx / 4] = 1; + + c = &g->color_table[g->codes[code].suffix * 4]; + if (c[3] > 128) { // don't render transparent pixels; + p[0] = c[2]; + p[1] = c[1]; + p[2] = c[0]; + p[3] = c[3]; + } + g->cur_x += 4; + + if (g->cur_x >= g->max_x) { + g->cur_x = g->start_x; + g->cur_y += g->step; + + while (g->cur_y >= g->max_y && g->parse > 0) { + g->step = (1 << g->parse) * g->line_size; + g->cur_y = g->start_y + (g->step >> 1); + --g->parse; + } + } +} + +static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) +{ + stbi_uc lzw_cs; + stbi__int32 len, init_code; + stbi__uint32 first; + stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; + stbi__gif_lzw *p; + + lzw_cs = stbi__get8(s); + if (lzw_cs > 12) return NULL; + clear = 1 << lzw_cs; + first = 1; + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + bits = 0; + valid_bits = 0; + for (init_code = 0; init_code < clear; init_code++) { + g->codes[init_code].prefix = -1; + g->codes[init_code].first = (stbi_uc) init_code; + g->codes[init_code].suffix = (stbi_uc) init_code; + } + + // support no starting clear code + avail = clear+2; + oldcode = -1; + + len = 0; + for(;;) { + if (valid_bits < codesize) { + if (len == 0) { + len = stbi__get8(s); // start new block + if (len == 0) + return g->out; + } + --len; + bits |= (stbi__int32) stbi__get8(s) << valid_bits; + valid_bits += 8; + } else { + stbi__int32 code = bits & codemask; + bits >>= codesize; + valid_bits -= codesize; + // @OPTIMIZE: is there some way we can accelerate the non-clear path? + if (code == clear) { // clear code + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + avail = clear + 2; + oldcode = -1; + first = 0; + } else if (code == clear + 1) { // end of stream code + stbi__skip(s, len); + while ((len = stbi__get8(s)) > 0) + stbi__skip(s,len); + return g->out; + } else if (code <= avail) { + if (first) { + return stbi__errpuc("no clear code", "Corrupt GIF"); + } + + if (oldcode >= 0) { + p = &g->codes[avail++]; + if (avail > 8192) { + return stbi__errpuc("too many codes", "Corrupt GIF"); + } + + p->prefix = (stbi__int16) oldcode; + p->first = g->codes[oldcode].first; + p->suffix = (code == avail) ? p->first : g->codes[code].first; + } else if (code == avail) + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + + stbi__out_gif_code(g, (stbi__uint16) code); + + if ((avail & codemask) == 0 && avail <= 0x0FFF) { + codesize++; + codemask = (1 << codesize) - 1; + } + + oldcode = code; + } else { + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + } + } + } +} + +// this function is designed to support animated gifs, although stb_image doesn't support it +// two back is the image from two frames ago, used for a very specific disposal format +static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back) +{ + int dispose; + int first_frame; + int pi; + int pcount; + STBI_NOTUSED(req_comp); + + // on first frame, any non-written pixels get the background colour (non-transparent) + first_frame = 0; + if (g->out == 0) { + if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header + if (!stbi__mad3sizes_valid(4, g->w, g->h, 0)) + return stbi__errpuc("too large", "GIF image is too large"); + pcount = g->w * g->h; + g->out = (stbi_uc *) stbi__malloc(4 * pcount); + g->background = (stbi_uc *) stbi__malloc(4 * pcount); + g->history = (stbi_uc *) stbi__malloc(pcount); + if (!g->out || !g->background || !g->history) + return stbi__errpuc("outofmem", "Out of memory"); + + // image is treated as "transparent" at the start - ie, nothing overwrites the current background; + // background colour is only used for pixels that are not rendered first frame, after that "background" + // color refers to the color that was there the previous frame. + memset(g->out, 0x00, 4 * pcount); + memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent) + memset(g->history, 0x00, pcount); // pixels that were affected previous frame + first_frame = 1; + } else { + // second frame - how do we dispose of the previous one? + dispose = (g->eflags & 0x1C) >> 2; + pcount = g->w * g->h; + + if ((dispose == 3) && (two_back == 0)) { + dispose = 2; // if I don't have an image to revert back to, default to the old background + } + + if (dispose == 3) { // use previous graphic + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 ); + } + } + } else if (dispose == 2) { + // restore what was changed last frame to background before that frame; + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi]) { + memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 ); + } + } + } else { + // This is a non-disposal case eithe way, so just + // leave the pixels as is, and they will become the new background + // 1: do not dispose + // 0: not specified. + } + + // background is what out is after the undoing of the previou frame; + memcpy( g->background, g->out, 4 * g->w * g->h ); + } + + // clear my history; + memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame + + for (;;) { + int tag = stbi__get8(s); + switch (tag) { + case 0x2C: /* Image Descriptor */ + { + stbi__int32 x, y, w, h; + stbi_uc *o; + + x = stbi__get16le(s); + y = stbi__get16le(s); + w = stbi__get16le(s); + h = stbi__get16le(s); + if (((x + w) > (g->w)) || ((y + h) > (g->h))) + return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); + + g->line_size = g->w * 4; + g->start_x = x * 4; + g->start_y = y * g->line_size; + g->max_x = g->start_x + w * 4; + g->max_y = g->start_y + h * g->line_size; + g->cur_x = g->start_x; + g->cur_y = g->start_y; + + // if the width of the specified rectangle is 0, that means + // we may not see *any* pixels or the image is malformed; + // to make sure this is caught, move the current y down to + // max_y (which is what out_gif_code checks). + if (w == 0) + g->cur_y = g->max_y; + + g->lflags = stbi__get8(s); + + if (g->lflags & 0x40) { + g->step = 8 * g->line_size; // first interlaced spacing + g->parse = 3; + } else { + g->step = g->line_size; + g->parse = 0; + } + + if (g->lflags & 0x80) { + stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); + g->color_table = (stbi_uc *) g->lpal; + } else if (g->flags & 0x80) { + g->color_table = (stbi_uc *) g->pal; + } else + return stbi__errpuc("missing color table", "Corrupt GIF"); + + o = stbi__process_gif_raster(s, g); + if (!o) return NULL; + + // if this was the first frame, + pcount = g->w * g->h; + if (first_frame && (g->bgindex > 0)) { + // if first frame, any pixel not drawn to gets the background color + for (pi = 0; pi < pcount; ++pi) { + if (g->history[pi] == 0) { + g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; + memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 ); + } + } + } + + return o; + } + + case 0x21: // Comment Extension. + { + int len; + int ext = stbi__get8(s); + if (ext == 0xF9) { // Graphic Control Extension. + len = stbi__get8(s); + if (len == 4) { + g->eflags = stbi__get8(s); + g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. + + // unset old transparent + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 255; + } + if (g->eflags & 0x01) { + g->transparent = stbi__get8(s); + if (g->transparent >= 0) { + g->pal[g->transparent][3] = 0; + } + } else { + // don't need transparent + stbi__skip(s, 1); + g->transparent = -1; + } + } else { + stbi__skip(s, len); + break; + } + } + while ((len = stbi__get8(s)) != 0) { + stbi__skip(s, len); + } + break; + } + + case 0x3B: // gif stream termination code + return (stbi_uc *) s; // using '1' causes warning on some compilers + + default: + return stbi__errpuc("unknown code", "Corrupt GIF"); + } + } +} + +static void *stbi__load_gif_main_outofmem(stbi__gif *g, stbi_uc *out, int **delays) +{ + STBI_FREE(g->out); + STBI_FREE(g->history); + STBI_FREE(g->background); + + if (out) STBI_FREE(out); + if (delays && *delays) STBI_FREE(*delays); + return stbi__errpuc("outofmem", "Out of memory"); +} + +static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp) +{ + if (stbi__gif_test(s)) { + int layers = 0; + stbi_uc *u = 0; + stbi_uc *out = 0; + stbi_uc *two_back = 0; + stbi__gif g; + int stride; + int out_size = 0; + int delays_size = 0; + + STBI_NOTUSED(out_size); + STBI_NOTUSED(delays_size); + + memset(&g, 0, sizeof(g)); + if (delays) { + *delays = 0; + } + + do { + u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); + if (u == (stbi_uc *) s) u = 0; // end of animated gif marker + + if (u) { + *x = g.w; + *y = g.h; + ++layers; + stride = g.w * g.h * 4; + + if (out) { + void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride ); + if (!tmp) + return stbi__load_gif_main_outofmem(&g, out, delays); + else { + out = (stbi_uc*) tmp; + out_size = layers * stride; + } + + if (delays) { + int *new_delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers ); + if (!new_delays) + return stbi__load_gif_main_outofmem(&g, out, delays); + *delays = new_delays; + delays_size = layers * sizeof(int); + } + } else { + out = (stbi_uc*)stbi__malloc( layers * stride ); + if (!out) + return stbi__load_gif_main_outofmem(&g, out, delays); + out_size = layers * stride; + if (delays) { + *delays = (int*) stbi__malloc( layers * sizeof(int) ); + if (!*delays) + return stbi__load_gif_main_outofmem(&g, out, delays); + delays_size = layers * sizeof(int); + } + } + memcpy( out + ((layers - 1) * stride), u, stride ); + if (layers >= 2) { + two_back = out - 2 * stride; + } + + if (delays) { + (*delays)[layers - 1U] = g.delay; + } + } + } while (u != 0); + + // free temp buffer; + STBI_FREE(g.out); + STBI_FREE(g.history); + STBI_FREE(g.background); + + // do the final conversion after loading everything; + if (req_comp && req_comp != 4) + out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); + + *z = layers; + return out; + } else { + return stbi__errpuc("not GIF", "Image was not as a gif type."); + } +} + +static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi_uc *u = 0; + stbi__gif g; + memset(&g, 0, sizeof(g)); + STBI_NOTUSED(ri); + + u = stbi__gif_load_next(s, &g, comp, req_comp, 0); + if (u == (stbi_uc *) s) u = 0; // end of animated gif marker + if (u) { + *x = g.w; + *y = g.h; + + // moved conversion to after successful load so that the same + // can be done for multiple frames. + if (req_comp && req_comp != 4) + u = stbi__convert_format(u, 4, req_comp, g.w, g.h); + } else if (g.out) { + // if there was an error and we allocated an image buffer, free it! + STBI_FREE(g.out); + } + + // free buffers needed for multiple frame loading; + STBI_FREE(g.history); + STBI_FREE(g.background); + + return u; +} + +static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp) +{ + return stbi__gif_info_raw(s,x,y,comp); +} +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR loader +// originally by Nicolas Schulz +#ifndef STBI_NO_HDR +static int stbi__hdr_test_core(stbi__context *s, const char *signature) +{ + int i; + for (i=0; signature[i]; ++i) + if (stbi__get8(s) != signature[i]) + return 0; + stbi__rewind(s); + return 1; +} + +static int stbi__hdr_test(stbi__context* s) +{ + int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); + stbi__rewind(s); + if(!r) { + r = stbi__hdr_test_core(s, "#?RGBE\n"); + stbi__rewind(s); + } + return r; +} + +#define STBI__HDR_BUFLEN 1024 +static char *stbi__hdr_gettoken(stbi__context *z, char *buffer) +{ + int len=0; + char c = '\0'; + + c = (char) stbi__get8(z); + + while (!stbi__at_eof(z) && c != '\n') { + buffer[len++] = c; + if (len == STBI__HDR_BUFLEN-1) { + // flush to end of line + while (!stbi__at_eof(z) && stbi__get8(z) != '\n') + ; + break; + } + c = (char) stbi__get8(z); + } + + buffer[len] = 0; + return buffer; +} + +static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp) +{ + if ( input[3] != 0 ) { + float f1; + // Exponent + f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8)); + if (req_comp <= 2) + output[0] = (input[0] + input[1] + input[2]) * f1 / 3; + else { + output[0] = input[0] * f1; + output[1] = input[1] * f1; + output[2] = input[2] * f1; + } + if (req_comp == 2) output[1] = 1; + if (req_comp == 4) output[3] = 1; + } else { + switch (req_comp) { + case 4: output[3] = 1; /* fallthrough */ + case 3: output[0] = output[1] = output[2] = 0; + break; + case 2: output[1] = 1; /* fallthrough */ + case 1: output[0] = 0; + break; + } + } +} + +static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + char buffer[STBI__HDR_BUFLEN]; + char *token; + int valid = 0; + int width, height; + stbi_uc *scanline; + float *hdr_data; + int len; + unsigned char count, value; + int i, j, k, c1,c2, z; + const char *headerToken; + STBI_NOTUSED(ri); + + // Check identifier + headerToken = stbi__hdr_gettoken(s,buffer); + if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) + return stbi__errpf("not HDR", "Corrupt HDR image"); + + // Parse header + for(;;) { + token = stbi__hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = stbi__hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = (int) strtol(token, NULL, 10); + + if (height > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)"); + if (width > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)"); + + *x = width; + *y = height; + + if (comp) *comp = 3; + if (req_comp == 0) req_comp = 3; + + if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) + return stbi__errpf("too large", "HDR image is too large"); + + // Read data + hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); + if (!hdr_data) + return stbi__errpf("outofmem", "Out of memory"); + + // Load image data + // image data is stored as some number of sca + if ( width < 8 || width >= 32768) { + // Read flat data + for (j=0; j < height; ++j) { + for (i=0; i < width; ++i) { + stbi_uc rgbe[4]; + main_decode_loop: + stbi__getn(s, rgbe, 4); + stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); + } + } + } else { + // Read RLE-encoded data + scanline = NULL; + + for (j = 0; j < height; ++j) { + c1 = stbi__get8(s); + c2 = stbi__get8(s); + len = stbi__get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + stbi_uc rgbe[4]; + rgbe[0] = (stbi_uc) c1; + rgbe[1] = (stbi_uc) c2; + rgbe[2] = (stbi_uc) len; + rgbe[3] = (stbi_uc) stbi__get8(s); + stbi__hdr_convert(hdr_data, rgbe, req_comp); + i = 1; + j = 0; + STBI_FREE(scanline); + goto main_decode_loop; // yes, this makes no sense + } + len <<= 8; + len |= stbi__get8(s); + if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } + if (scanline == NULL) { + scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0); + if (!scanline) { + STBI_FREE(hdr_data); + return stbi__errpf("outofmem", "Out of memory"); + } + } + + for (k = 0; k < 4; ++k) { + int nleft; + i = 0; + while ((nleft = width - i) > 0) { + count = stbi__get8(s); + if (count > 128) { + // Run + value = stbi__get8(s); + count -= 128; + if ((count == 0) || (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + if ((count == 0) || (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = stbi__get8(s); + } + } + } + for (i=0; i < width; ++i) + stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); + } + if (scanline) + STBI_FREE(scanline); + } + + return hdr_data; +} + +static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp) +{ + char buffer[STBI__HDR_BUFLEN]; + char *token; + int valid = 0; + int dummy; + + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + + if (stbi__hdr_test(s) == 0) { + stbi__rewind( s ); + return 0; + } + + for(;;) { + token = stbi__hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) { + stbi__rewind( s ); + return 0; + } + token = stbi__hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) { + stbi__rewind( s ); + return 0; + } + token += 3; + *y = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) { + stbi__rewind( s ); + return 0; + } + token += 3; + *x = (int) strtol(token, NULL, 10); + *comp = 3; + return 1; +} +#endif // STBI_NO_HDR + +#ifndef STBI_NO_BMP +static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp) +{ + void *p; + stbi__bmp_data info; + + info.all_a = 255; + p = stbi__bmp_parse_header(s, &info); + if (p == NULL) { + stbi__rewind( s ); + return 0; + } + if (x) *x = s->img_x; + if (y) *y = s->img_y; + if (comp) { + if (info.bpp == 24 && info.ma == 0xff000000) + *comp = 3; + else + *comp = info.ma ? 4 : 3; + } + return 1; +} +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) +{ + int channelCount, dummy, depth; + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind( s ); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind( s ); + return 0; + } + *y = stbi__get32be(s); + *x = stbi__get32be(s); + depth = stbi__get16be(s); + if (depth != 8 && depth != 16) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 3) { + stbi__rewind( s ); + return 0; + } + *comp = 4; + return 1; +} + +static int stbi__psd_is16(stbi__context *s) +{ + int channelCount, depth; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind( s ); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind( s ); + return 0; + } + STBI_NOTUSED(stbi__get32be(s)); + STBI_NOTUSED(stbi__get32be(s)); + depth = stbi__get16be(s); + if (depth != 16) { + stbi__rewind( s ); + return 0; + } + return 1; +} +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp) +{ + int act_comp=0,num_packets=0,chained,dummy; + stbi__pic_packet packets[10]; + + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + + if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) { + stbi__rewind(s); + return 0; + } + + stbi__skip(s, 88); + + *x = stbi__get16be(s); + *y = stbi__get16be(s); + if (stbi__at_eof(s)) { + stbi__rewind( s); + return 0; + } + if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) { + stbi__rewind( s ); + return 0; + } + + stbi__skip(s, 8); + + do { + stbi__pic_packet *packet; + + if (num_packets==sizeof(packets)/sizeof(packets[0])) + return 0; + + packet = &packets[num_packets++]; + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + act_comp |= packet->channel; + + if (stbi__at_eof(s)) { + stbi__rewind( s ); + return 0; + } + if (packet->size != 8) { + stbi__rewind( s ); + return 0; + } + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); + + return 1; +} +#endif + +// ************************************************************************************************* +// Portable Gray Map and Portable Pixel Map loader +// by Ken Miller +// +// PGM: http://netpbm.sourceforge.net/doc/pgm.html +// PPM: http://netpbm.sourceforge.net/doc/ppm.html +// +// Known limitations: +// Does not support comments in the header section +// Does not support ASCII image data (formats P2 and P3) + +#ifndef STBI_NO_PNM + +static int stbi__pnm_test(stbi__context *s) +{ + char p, t; + p = (char) stbi__get8(s); + t = (char) stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind( s ); + return 0; + } + return 1; +} + +static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri) +{ + stbi_uc *out; + STBI_NOTUSED(ri); + + ri->bits_per_channel = stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n); + if (ri->bits_per_channel == 0) + return 0; + + if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)"); + + *x = s->img_x; + *y = s->img_y; + if (comp) *comp = s->img_n; + + if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0)) + return stbi__errpuc("too large", "PNM too large"); + + out = (stbi_uc *) stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + if (!stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8))) { + STBI_FREE(out); + return stbi__errpuc("bad PNM", "PNM file truncated"); + } + + if (req_comp && req_comp != s->img_n) { + if (ri->bits_per_channel == 16) { + out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, s->img_n, req_comp, s->img_x, s->img_y); + } else { + out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); + } + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + return out; +} + +static int stbi__pnm_isspace(char c) +{ + return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; +} + +static void stbi__pnm_skip_whitespace(stbi__context *s, char *c) +{ + for (;;) { + while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) + *c = (char) stbi__get8(s); + + if (stbi__at_eof(s) || *c != '#') + break; + + while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' ) + *c = (char) stbi__get8(s); + } +} + +static int stbi__pnm_isdigit(char c) +{ + return c >= '0' && c <= '9'; +} + +static int stbi__pnm_getinteger(stbi__context *s, char *c) +{ + int value = 0; + + while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { + value = value*10 + (*c - '0'); + *c = (char) stbi__get8(s); + if((value > 214748364) || (value == 214748364 && *c > '7')) + return stbi__err("integer parse overflow", "Parsing an integer in the PPM header overflowed a 32-bit int"); + } + + return value; +} + +static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp) +{ + int maxv, dummy; + char c, p, t; + + if (!x) x = &dummy; + if (!y) y = &dummy; + if (!comp) comp = &dummy; + + stbi__rewind(s); + + // Get identifier + p = (char) stbi__get8(s); + t = (char) stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind(s); + return 0; + } + + *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm + + c = (char) stbi__get8(s); + stbi__pnm_skip_whitespace(s, &c); + + *x = stbi__pnm_getinteger(s, &c); // read width + if(*x == 0) + return stbi__err("invalid width", "PPM image header had zero or overflowing width"); + stbi__pnm_skip_whitespace(s, &c); + + *y = stbi__pnm_getinteger(s, &c); // read height + if (*y == 0) + return stbi__err("invalid width", "PPM image header had zero or overflowing width"); + stbi__pnm_skip_whitespace(s, &c); + + maxv = stbi__pnm_getinteger(s, &c); // read max value + if (maxv > 65535) + return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images"); + else if (maxv > 255) + return 16; + else + return 8; +} + +static int stbi__pnm_is16(stbi__context *s) +{ + if (stbi__pnm_info(s, NULL, NULL, NULL) == 16) + return 1; + return 0; +} +#endif + +static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) +{ + #ifndef STBI_NO_JPEG + if (stbi__jpeg_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PNG + if (stbi__png_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_GIF + if (stbi__gif_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_BMP + if (stbi__bmp_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PSD + if (stbi__psd_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PIC + if (stbi__pic_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PNM + if (stbi__pnm_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_info(s, x, y, comp)) return 1; + #endif + + // test tga last because it's a crappy test! + #ifndef STBI_NO_TGA + if (stbi__tga_info(s, x, y, comp)) + return 1; + #endif + return stbi__err("unknown image type", "Image not of any known type, or corrupt"); +} + +static int stbi__is_16_main(stbi__context *s) +{ + #ifndef STBI_NO_PNG + if (stbi__png_is16(s)) return 1; + #endif + + #ifndef STBI_NO_PSD + if (stbi__psd_is16(s)) return 1; + #endif + + #ifndef STBI_NO_PNM + if (stbi__pnm_is16(s)) return 1; + #endif + return 0; +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result; + if (!f) return stbi__err("can't fopen", "Unable to open file"); + result = stbi_info_from_file(f, x, y, comp); + fclose(f); + return result; +} + +STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) +{ + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__info_main(&s,x,y,comp); + fseek(f,pos,SEEK_SET); + return r; +} + +STBIDEF int stbi_is_16_bit(char const *filename) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result; + if (!f) return stbi__err("can't fopen", "Unable to open file"); + result = stbi_is_16_bit_from_file(f); + fclose(f); + return result; +} + +STBIDEF int stbi_is_16_bit_from_file(FILE *f) +{ + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__is_16_main(&s); + fseek(f,pos,SEEK_SET); + return r; +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__info_main(&s,x,y,comp); +} + +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); + return stbi__info_main(&s,x,y,comp); +} + +STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__is_16_main(&s); +} + +STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); + return stbi__is_16_main(&s); +} + +#endif // STB_IMAGE_IMPLEMENTATION + +/* + revision history: + 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs + 2.19 (2018-02-11) fix warning + 2.18 (2018-01-30) fix warnings + 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug + 1-bit BMP + *_is_16_bit api + avoid warnings + 2.16 (2017-07-23) all functions have 16-bit variants; + STBI_NO_STDIO works again; + compilation fixes; + fix rounding in unpremultiply; + optimize vertical flip; + disable raw_len validation; + documentation fixes + 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; + warning fixes; disable run-time SSE detection on gcc; + uniform handling of optional "return" values; + thread-safe initialization of zlib tables + 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs + 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now + 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes + 2.11 (2016-04-02) allocate large structures on the stack + remove white matting for transparent PSD + fix reported channel count for PNG & BMP + re-enable SSE2 in non-gcc 64-bit + support RGB-formatted JPEG + read 16-bit PNGs (only as 8-bit) + 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED + 2.09 (2016-01-16) allow comments in PNM files + 16-bit-per-pixel TGA (not bit-per-component) + info() for TGA could break due to .hdr handling + info() for BMP to shares code instead of sloppy parse + can use STBI_REALLOC_SIZED if allocator doesn't support realloc + code cleanup + 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA + 2.07 (2015-09-13) fix compiler warnings + partial animated GIF support + limited 16-bpc PSD support + #ifdef unused functions + bug with < 92 byte PIC,PNM,HDR,TGA + 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value + 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning + 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit + 2.03 (2015-04-12) extra corruption checking (mmozeiko) + stbi_set_flip_vertically_on_load (nguillemot) + fix NEON support; fix mingw support + 2.02 (2015-01-19) fix incorrect assert, fix warning + 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 + 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG + 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) + progressive JPEG (stb) + PGM/PPM support (Ken Miller) + STBI_MALLOC,STBI_REALLOC,STBI_FREE + GIF bugfix -- seemingly never worked + STBI_NO_*, STBI_ONLY_* + 1.48 (2014-12-14) fix incorrectly-named assert() + 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) + optimize PNG (ryg) + fix bug in interlaced PNG with user-specified channel count (stb) + 1.46 (2014-08-26) + fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG + 1.45 (2014-08-16) + fix MSVC-ARM internal compiler error by wrapping malloc + 1.44 (2014-08-07) + various warning fixes from Ronny Chevalier + 1.43 (2014-07-15) + fix MSVC-only compiler problem in code changed in 1.42 + 1.42 (2014-07-09) + don't define _CRT_SECURE_NO_WARNINGS (affects user code) + fixes to stbi__cleanup_jpeg path + added STBI_ASSERT to avoid requiring assert.h + 1.41 (2014-06-25) + fix search&replace from 1.36 that messed up comments/error messages + 1.40 (2014-06-22) + fix gcc struct-initialization warning + 1.39 (2014-06-15) + fix to TGA optimization when req_comp != number of components in TGA; + fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) + add support for BMP version 5 (more ignored fields) + 1.38 (2014-06-06) + suppress MSVC warnings on integer casts truncating values + fix accidental rename of 'skip' field of I/O + 1.37 (2014-06-04) + remove duplicate typedef + 1.36 (2014-06-03) + convert to header file single-file library + if de-iphone isn't set, load iphone images color-swapped instead of returning NULL + 1.35 (2014-05-27) + various warnings + fix broken STBI_SIMD path + fix bug where stbi_load_from_file no longer left file pointer in correct place + fix broken non-easy path for 32-bit BMP (possibly never used) + TGA optimization by Arseny Kapoulkine + 1.34 (unknown) + use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case + 1.33 (2011-07-14) + make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements + 1.32 (2011-07-13) + support for "info" function for all supported filetypes (SpartanJ) + 1.31 (2011-06-20) + a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) + added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) + removed deprecated format-specific test/load functions + removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway + error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) + fix inefficiency in decoding 32-bit BMP (David Woo) + 1.29 (2010-08-16) + various warning fixes from Aurelien Pocheville + 1.28 (2010-08-01) + fix bug in GIF palette transparency (SpartanJ) + 1.27 (2010-08-01) + cast-to-stbi_uc to fix warnings + 1.26 (2010-07-24) + fix bug in file buffering for PNG reported by SpartanJ + 1.25 (2010-07-17) + refix trans_data warning (Won Chun) + 1.24 (2010-07-12) + perf improvements reading from files on platforms with lock-heavy fgetc() + minor perf improvements for jpeg + deprecated type-specific functions so we'll get feedback if they're needed + attempt to fix trans_data warning (Won Chun) + 1.23 fixed bug in iPhone support + 1.22 (2010-07-10) + removed image *writing* support + stbi_info support from Jetro Lauha + GIF support from Jean-Marc Lienher + iPhone PNG-extensions from James Brown + warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) + 1.21 fix use of 'stbi_uc' in header (reported by jon blow) + 1.20 added support for Softimage PIC, by Tom Seddon + 1.19 bug in interlaced PNG corruption check (found by ryg) + 1.18 (2008-08-02) + fix a threading bug (local mutable static) + 1.17 support interlaced PNG + 1.16 major bugfix - stbi__convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug + header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant + 0.50 (2006-11-19) + first released version +*/ + + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ diff --git a/src/stb_image_write.h b/src/stb_image_write.h new file mode 100644 index 0000000..e4b32ed --- /dev/null +++ b/src/stb_image_write.h @@ -0,0 +1,1724 @@ +/* stb_image_write - v1.16 - public domain - http://nothings.org/stb + writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 + no warranty implied; use at your own risk + + Before #including, + + #define STB_IMAGE_WRITE_IMPLEMENTATION + + in the file that you want to have the implementation. + + Will probably not work correctly with strict-aliasing optimizations. + +ABOUT: + + This header file is a library for writing images to C stdio or a callback. + + The PNG output is not optimal; it is 20-50% larger than the file + written by a decent optimizing implementation; though providing a custom + zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that. + This library is designed for source code compactness and simplicity, + not optimal image file size or run-time performance. + +BUILDING: + + You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h. + You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace + malloc,realloc,free. + You can #define STBIW_MEMMOVE() to replace memmove() + You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function + for PNG compression (instead of the builtin one), it must have the following signature: + unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality); + The returned data will be freed with STBIW_FREE() (free() by default), + so it must be heap allocated with STBIW_MALLOC() (malloc() by default), + +UNICODE: + + If compiling for Windows and you wish to use Unicode filenames, compile + with + #define STBIW_WINDOWS_UTF8 + and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert + Windows wchar_t filenames to utf8. + +USAGE: + + There are five functions, one for each image file format: + + int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); + int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality); + int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); + + void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically + + There are also five equivalent functions that use an arbitrary write function. You are + expected to open/close your file-equivalent before and after calling these: + + int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); + int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); + int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); + int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); + int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); + + where the callback is: + void stbi_write_func(void *context, void *data, int size); + + You can configure it with these global variables: + int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE + int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression + int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode + + + You can define STBI_WRITE_NO_STDIO to disable the file variant of these + functions, so the library will not use stdio.h at all. However, this will + also disable HDR writing, because it requires stdio for formatted output. + + Each function returns 0 on failure and non-0 on success. + + The functions create an image file defined by the parameters. The image + is a rectangle of pixels stored from left-to-right, top-to-bottom. + Each pixel contains 'comp' channels of data stored interleaved with 8-bits + per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is + monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall. + The *data pointer points to the first byte of the top-left-most pixel. + For PNG, "stride_in_bytes" is the distance in bytes from the first byte of + a row of pixels to the first byte of the next row of pixels. + + PNG creates output files with the same number of components as the input. + The BMP format expands Y to RGB in the file format and does not + output alpha. + + PNG supports writing rectangles of data even when the bytes storing rows of + data are not consecutive in memory (e.g. sub-rectangles of a larger image), + by supplying the stride between the beginning of adjacent rows. The other + formats do not. (Thus you cannot write a native-format BMP through the BMP + writer, both because it is in BGR order and because it may have padding + at the end of the line.) + + PNG allows you to set the deflate compression level by setting the global + variable 'stbi_write_png_compression_level' (it defaults to 8). + + HDR expects linear float data. Since the format is always 32-bit rgb(e) + data, alpha (if provided) is discarded, and for monochrome data it is + replicated across all three channels. + + TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed + data, set the global variable 'stbi_write_tga_with_rle' to 0. + + JPEG does ignore alpha channels in input data; quality is between 1 and 100. + Higher quality looks better but results in a bigger image. + JPEG baseline (no JPEG progressive). + +CREDITS: + + + Sean Barrett - PNG/BMP/TGA + Baldur Karlsson - HDR + Jean-Sebastien Guay - TGA monochrome + Tim Kelsey - misc enhancements + Alan Hickman - TGA RLE + Emmanuel Julien - initial file IO callback implementation + Jon Olick - original jo_jpeg.cpp code + Daniel Gibson - integrate JPEG, allow external zlib + Aarni Koskela - allow choosing PNG filter + + bugfixes: + github:Chribba + Guillaume Chereau + github:jry2 + github:romigrou + Sergio Gonzalez + Jonas Karlsson + Filip Wasil + Thatcher Ulrich + github:poppolopoppo + Patrick Boettcher + github:xeekworx + Cap Petschulat + Simon Rodriguez + Ivan Tikhonov + github:ignotion + Adam Schackart + Andrew Kensler + +LICENSE + + See end of file for license information. + +*/ + +#ifndef INCLUDE_STB_IMAGE_WRITE_H +#define INCLUDE_STB_IMAGE_WRITE_H + +#include + +// if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline' +#ifndef STBIWDEF +#ifdef STB_IMAGE_WRITE_STATIC +#define STBIWDEF static +#else +#ifdef __cplusplus +#define STBIWDEF extern "C" +#else +#define STBIWDEF extern +#endif +#endif +#endif + +#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations +STBIWDEF int stbi_write_tga_with_rle; +STBIWDEF int stbi_write_png_compression_level; +STBIWDEF int stbi_write_force_png_filter; +#endif + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); +STBIWDEF int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); +STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality); + +#ifdef STBIW_WINDOWS_UTF8 +STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); +#endif +#endif + +typedef void stbi_write_func(void *context, void *data, int size); + +STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); +STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); +STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); +STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); + +STBIWDEF void stbi_flip_vertically_on_write(int flip_boolean); + +#endif//INCLUDE_STB_IMAGE_WRITE_H + +#ifdef STB_IMAGE_WRITE_IMPLEMENTATION + +#ifdef _WIN32 + #ifndef _CRT_SECURE_NO_WARNINGS + #define _CRT_SECURE_NO_WARNINGS + #endif + #ifndef _CRT_NONSTDC_NO_DEPRECATE + #define _CRT_NONSTDC_NO_DEPRECATE + #endif +#endif + +#ifndef STBI_WRITE_NO_STDIO +#include +#endif // STBI_WRITE_NO_STDIO + +#include +#include +#include +#include + +#if defined(STBIW_MALLOC) && defined(STBIW_FREE) && (defined(STBIW_REALLOC) || defined(STBIW_REALLOC_SIZED)) +// ok +#elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) && !defined(STBIW_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." +#endif + +#ifndef STBIW_MALLOC +#define STBIW_MALLOC(sz) malloc(sz) +#define STBIW_REALLOC(p,newsz) realloc(p,newsz) +#define STBIW_FREE(p) free(p) +#endif + +#ifndef STBIW_REALLOC_SIZED +#define STBIW_REALLOC_SIZED(p,oldsz,newsz) STBIW_REALLOC(p,newsz) +#endif + + +#ifndef STBIW_MEMMOVE +#define STBIW_MEMMOVE(a,b,sz) memmove(a,b,sz) +#endif + + +#ifndef STBIW_ASSERT +#include +#define STBIW_ASSERT(x) assert(x) +#endif + +#define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff) + +#ifdef STB_IMAGE_WRITE_STATIC +static int stbi_write_png_compression_level = 8; +static int stbi_write_tga_with_rle = 1; +static int stbi_write_force_png_filter = -1; +#else +int stbi_write_png_compression_level = 8; +int stbi_write_tga_with_rle = 1; +int stbi_write_force_png_filter = -1; +#endif + +static int stbi__flip_vertically_on_write = 0; + +STBIWDEF void stbi_flip_vertically_on_write(int flag) +{ + stbi__flip_vertically_on_write = flag; +} + +typedef struct +{ + stbi_write_func *func; + void *context; + unsigned char buffer[64]; + int buf_used; +} stbi__write_context; + +// initialize a callback-based context +static void stbi__start_write_callbacks(stbi__write_context *s, stbi_write_func *c, void *context) +{ + s->func = c; + s->context = context; +} + +#ifndef STBI_WRITE_NO_STDIO + +static void stbi__stdio_write(void *context, void *data, int size) +{ + fwrite(data,1,size,(FILE*) context); +} + +#if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8) +#ifdef __cplusplus +#define STBIW_EXTERN extern "C" +#else +#define STBIW_EXTERN extern +#endif +STBIW_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); +STBIW_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); + +STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) +{ + return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL); +} +#endif + +static FILE *stbiw__fopen(char const *filename, char const *mode) +{ + FILE *f; +#if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename))) + return 0; + + if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode))) + return 0; + +#if defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != _wfopen_s(&f, wFilename, wMode)) + f = 0; +#else + f = _wfopen(wFilename, wMode); +#endif + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != fopen_s(&f, filename, mode)) + f=0; +#else + f = fopen(filename, mode); +#endif + return f; +} + +static int stbi__start_write_file(stbi__write_context *s, const char *filename) +{ + FILE *f = stbiw__fopen(filename, "wb"); + stbi__start_write_callbacks(s, stbi__stdio_write, (void *) f); + return f != NULL; +} + +static void stbi__end_write_file(stbi__write_context *s) +{ + fclose((FILE *)s->context); +} + +#endif // !STBI_WRITE_NO_STDIO + +typedef unsigned int stbiw_uint32; +typedef int stb_image_write_test[sizeof(stbiw_uint32)==4 ? 1 : -1]; + +static void stbiw__writefv(stbi__write_context *s, const char *fmt, va_list v) +{ + while (*fmt) { + switch (*fmt++) { + case ' ': break; + case '1': { unsigned char x = STBIW_UCHAR(va_arg(v, int)); + s->func(s->context,&x,1); + break; } + case '2': { int x = va_arg(v,int); + unsigned char b[2]; + b[0] = STBIW_UCHAR(x); + b[1] = STBIW_UCHAR(x>>8); + s->func(s->context,b,2); + break; } + case '4': { stbiw_uint32 x = va_arg(v,int); + unsigned char b[4]; + b[0]=STBIW_UCHAR(x); + b[1]=STBIW_UCHAR(x>>8); + b[2]=STBIW_UCHAR(x>>16); + b[3]=STBIW_UCHAR(x>>24); + s->func(s->context,b,4); + break; } + default: + STBIW_ASSERT(0); + return; + } + } +} + +static void stbiw__writef(stbi__write_context *s, const char *fmt, ...) +{ + va_list v; + va_start(v, fmt); + stbiw__writefv(s, fmt, v); + va_end(v); +} + +static void stbiw__write_flush(stbi__write_context *s) +{ + if (s->buf_used) { + s->func(s->context, &s->buffer, s->buf_used); + s->buf_used = 0; + } +} + +static void stbiw__putc(stbi__write_context *s, unsigned char c) +{ + s->func(s->context, &c, 1); +} + +static void stbiw__write1(stbi__write_context *s, unsigned char a) +{ + if ((size_t)s->buf_used + 1 > sizeof(s->buffer)) + stbiw__write_flush(s); + s->buffer[s->buf_used++] = a; +} + +static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c) +{ + int n; + if ((size_t)s->buf_used + 3 > sizeof(s->buffer)) + stbiw__write_flush(s); + n = s->buf_used; + s->buf_used = n+3; + s->buffer[n+0] = a; + s->buffer[n+1] = b; + s->buffer[n+2] = c; +} + +static void stbiw__write_pixel(stbi__write_context *s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char *d) +{ + unsigned char bg[3] = { 255, 0, 255}, px[3]; + int k; + + if (write_alpha < 0) + stbiw__write1(s, d[comp - 1]); + + switch (comp) { + case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case + case 1: + if (expand_mono) + stbiw__write3(s, d[0], d[0], d[0]); // monochrome bmp + else + stbiw__write1(s, d[0]); // monochrome TGA + break; + case 4: + if (!write_alpha) { + // composite against pink background + for (k = 0; k < 3; ++k) + px[k] = bg[k] + ((d[k] - bg[k]) * d[3]) / 255; + stbiw__write3(s, px[1 - rgb_dir], px[1], px[1 + rgb_dir]); + break; + } + /* FALLTHROUGH */ + case 3: + stbiw__write3(s, d[1 - rgb_dir], d[1], d[1 + rgb_dir]); + break; + } + if (write_alpha > 0) + stbiw__write1(s, d[comp - 1]); +} + +static void stbiw__write_pixels(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad, int expand_mono) +{ + stbiw_uint32 zero = 0; + int i,j, j_end; + + if (y <= 0) + return; + + if (stbi__flip_vertically_on_write) + vdir *= -1; + + if (vdir < 0) { + j_end = -1; j = y-1; + } else { + j_end = y; j = 0; + } + + for (; j != j_end; j += vdir) { + for (i=0; i < x; ++i) { + unsigned char *d = (unsigned char *) data + (j*x+i)*comp; + stbiw__write_pixel(s, rgb_dir, comp, write_alpha, expand_mono, d); + } + stbiw__write_flush(s); + s->func(s->context, &zero, scanline_pad); + } +} + +static int stbiw__outfile(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void *data, int alpha, int pad, const char *fmt, ...) +{ + if (y < 0 || x < 0) { + return 0; + } else { + va_list v; + va_start(v, fmt); + stbiw__writefv(s, fmt, v); + va_end(v); + stbiw__write_pixels(s,rgb_dir,vdir,x,y,comp,data,alpha,pad, expand_mono); + return 1; + } +} + +static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data) +{ + if (comp != 4) { + // write RGB bitmap + int pad = (-x*3) & 3; + return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad, + "11 4 22 4" "4 44 22 444444", + 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header + 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header + } else { + // RGBA bitmaps need a v4 header + // use BI_BITFIELDS mode with 32bpp and alpha mask + // (straight BI_RGB with alpha mask doesn't work in most readers) + return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *)data,1,0, + "11 4 22 4" "4 44 22 444444 4444 4 444 444 444 444", + 'B', 'M', 14+108+x*y*4, 0, 0, 14+108, // file header + 108, x,y, 1,32, 3,0,0,0,0,0, 0xff0000,0xff00,0xff,0xff000000u, 0, 0,0,0, 0,0,0, 0,0,0, 0,0,0); // bitmap V4 header + } +} + +STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_bmp_core(&s, x, y, comp, data); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data) +{ + stbi__write_context s = { 0 }; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_bmp_core(&s, x, y, comp, data); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif //!STBI_WRITE_NO_STDIO + +static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, void *data) +{ + int has_alpha = (comp == 2 || comp == 4); + int colorbytes = has_alpha ? comp-1 : comp; + int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 + + if (y < 0 || x < 0) + return 0; + + if (!stbi_write_tga_with_rle) { + return stbiw__outfile(s, -1, -1, x, y, comp, 0, (void *) data, has_alpha, 0, + "111 221 2222 11", 0, 0, format, 0, 0, 0, 0, 0, x, y, (colorbytes + has_alpha) * 8, has_alpha * 8); + } else { + int i,j,k; + int jend, jdir; + + stbiw__writef(s, "111 221 2222 11", 0,0,format+8, 0,0,0, 0,0,x,y, (colorbytes + has_alpha) * 8, has_alpha * 8); + + if (stbi__flip_vertically_on_write) { + j = 0; + jend = y; + jdir = 1; + } else { + j = y-1; + jend = -1; + jdir = -1; + } + for (; j != jend; j += jdir) { + unsigned char *row = (unsigned char *) data + j * x * comp; + int len; + + for (i = 0; i < x; i += len) { + unsigned char *begin = row + i * comp; + int diff = 1; + len = 1; + + if (i < x - 1) { + ++len; + diff = memcmp(begin, row + (i + 1) * comp, comp); + if (diff) { + const unsigned char *prev = begin; + for (k = i + 2; k < x && len < 128; ++k) { + if (memcmp(prev, row + k * comp, comp)) { + prev += comp; + ++len; + } else { + --len; + break; + } + } + } else { + for (k = i + 2; k < x && len < 128; ++k) { + if (!memcmp(begin, row + k * comp, comp)) { + ++len; + } else { + break; + } + } + } + } + + if (diff) { + unsigned char header = STBIW_UCHAR(len - 1); + stbiw__write1(s, header); + for (k = 0; k < len; ++k) { + stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin + k * comp); + } + } else { + unsigned char header = STBIW_UCHAR(len - 129); + stbiw__write1(s, header); + stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin); + } + } + } + stbiw__write_flush(s); + } + return 1; +} + +STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_tga_core(&s, x, y, comp, (void *) data); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data) +{ + stbi__write_context s = { 0 }; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_tga_core(&s, x, y, comp, (void *) data); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR writer +// by Baldur Karlsson + +#define stbiw__max(a, b) ((a) > (b) ? (a) : (b)) + +#ifndef STBI_WRITE_NO_STDIO + +static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear) +{ + int exponent; + float maxcomp = stbiw__max(linear[0], stbiw__max(linear[1], linear[2])); + + if (maxcomp < 1e-32f) { + rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; + } else { + float normalize = (float) frexp(maxcomp, &exponent) * 256.0f/maxcomp; + + rgbe[0] = (unsigned char)(linear[0] * normalize); + rgbe[1] = (unsigned char)(linear[1] * normalize); + rgbe[2] = (unsigned char)(linear[2] * normalize); + rgbe[3] = (unsigned char)(exponent + 128); + } +} + +static void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte) +{ + unsigned char lengthbyte = STBIW_UCHAR(length+128); + STBIW_ASSERT(length+128 <= 255); + s->func(s->context, &lengthbyte, 1); + s->func(s->context, &databyte, 1); +} + +static void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data) +{ + unsigned char lengthbyte = STBIW_UCHAR(length); + STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code + s->func(s->context, &lengthbyte, 1); + s->func(s->context, data, length); +} + +static void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline) +{ + unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; + unsigned char rgbe[4]; + float linear[3]; + int x; + + scanlineheader[2] = (width&0xff00)>>8; + scanlineheader[3] = (width&0x00ff); + + /* skip RLE for images too small or large */ + if (width < 8 || width >= 32768) { + for (x=0; x < width; x++) { + switch (ncomp) { + case 4: /* fallthrough */ + case 3: linear[2] = scanline[x*ncomp + 2]; + linear[1] = scanline[x*ncomp + 1]; + linear[0] = scanline[x*ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; + break; + } + stbiw__linear_to_rgbe(rgbe, linear); + s->func(s->context, rgbe, 4); + } + } else { + int c,r; + /* encode into scratch buffer */ + for (x=0; x < width; x++) { + switch(ncomp) { + case 4: /* fallthrough */ + case 3: linear[2] = scanline[x*ncomp + 2]; + linear[1] = scanline[x*ncomp + 1]; + linear[0] = scanline[x*ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; + break; + } + stbiw__linear_to_rgbe(rgbe, linear); + scratch[x + width*0] = rgbe[0]; + scratch[x + width*1] = rgbe[1]; + scratch[x + width*2] = rgbe[2]; + scratch[x + width*3] = rgbe[3]; + } + + s->func(s->context, scanlineheader, 4); + + /* RLE each component separately */ + for (c=0; c < 4; c++) { + unsigned char *comp = &scratch[width*c]; + + x = 0; + while (x < width) { + // find first run + r = x; + while (r+2 < width) { + if (comp[r] == comp[r+1] && comp[r] == comp[r+2]) + break; + ++r; + } + if (r+2 >= width) + r = width; + // dump up to first run + while (x < r) { + int len = r-x; + if (len > 128) len = 128; + stbiw__write_dump_data(s, len, &comp[x]); + x += len; + } + // if there's a run, output it + if (r+2 < width) { // same test as what we break out of in search loop, so only true if we break'd + // find next byte after run + while (r < width && comp[r] == comp[x]) + ++r; + // output run up to r + while (x < r) { + int len = r-x; + if (len > 127) len = 127; + stbiw__write_run_data(s, len, comp[x]); + x += len; + } + } + } + } + } +} + +static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, float *data) +{ + if (y <= 0 || x <= 0 || data == NULL) + return 0; + else { + // Each component is stored separately. Allocate scratch space for full output scanline. + unsigned char *scratch = (unsigned char *) STBIW_MALLOC(x*4); + int i, len; + char buffer[128]; + char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; + s->func(s->context, header, sizeof(header)-1); + +#ifdef __STDC_LIB_EXT1__ + len = sprintf_s(buffer, sizeof(buffer), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); +#else + len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); +#endif + s->func(s->context, buffer, len); + + for(i=0; i < y; i++) + stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*x*(stbi__flip_vertically_on_write ? y-1-i : i)); + STBIW_FREE(scratch); + return 1; + } +} + +STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_hdr_core(&s, x, y, comp, (float *) data); +} + +STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data) +{ + stbi__write_context s = { 0 }; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_hdr_core(&s, x, y, comp, (float *) data); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif // STBI_WRITE_NO_STDIO + + +////////////////////////////////////////////////////////////////////////////// +// +// PNG writer +// + +#ifndef STBIW_ZLIB_COMPRESS +// stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() +#define stbiw__sbraw(a) ((int *) (void *) (a) - 2) +#define stbiw__sbm(a) stbiw__sbraw(a)[0] +#define stbiw__sbn(a) stbiw__sbraw(a)[1] + +#define stbiw__sbneedgrow(a,n) ((a)==0 || stbiw__sbn(a)+n >= stbiw__sbm(a)) +#define stbiw__sbmaybegrow(a,n) (stbiw__sbneedgrow(a,(n)) ? stbiw__sbgrow(a,n) : 0) +#define stbiw__sbgrow(a,n) stbiw__sbgrowf((void **) &(a), (n), sizeof(*(a))) + +#define stbiw__sbpush(a, v) (stbiw__sbmaybegrow(a,1), (a)[stbiw__sbn(a)++] = (v)) +#define stbiw__sbcount(a) ((a) ? stbiw__sbn(a) : 0) +#define stbiw__sbfree(a) ((a) ? STBIW_FREE(stbiw__sbraw(a)),0 : 0) + +static void *stbiw__sbgrowf(void **arr, int increment, int itemsize) +{ + int m = *arr ? 2*stbiw__sbm(*arr)+increment : increment+1; + void *p = STBIW_REALLOC_SIZED(*arr ? stbiw__sbraw(*arr) : 0, *arr ? (stbiw__sbm(*arr)*itemsize + sizeof(int)*2) : 0, itemsize * m + sizeof(int)*2); + STBIW_ASSERT(p); + if (p) { + if (!*arr) ((int *) p)[1] = 0; + *arr = (void *) ((int *) p + 2); + stbiw__sbm(*arr) = m; + } + return *arr; +} + +static unsigned char *stbiw__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount) +{ + while (*bitcount >= 8) { + stbiw__sbpush(data, STBIW_UCHAR(*bitbuffer)); + *bitbuffer >>= 8; + *bitcount -= 8; + } + return data; +} + +static int stbiw__zlib_bitrev(int code, int codebits) +{ + int res=0; + while (codebits--) { + res = (res << 1) | (code & 1); + code >>= 1; + } + return res; +} + +static unsigned int stbiw__zlib_countm(unsigned char *a, unsigned char *b, int limit) +{ + int i; + for (i=0; i < limit && i < 258; ++i) + if (a[i] != b[i]) break; + return i; +} + +static unsigned int stbiw__zhash(unsigned char *data) +{ + stbiw_uint32 hash = data[0] + (data[1] << 8) + (data[2] << 16); + hash ^= hash << 3; + hash += hash >> 5; + hash ^= hash << 4; + hash += hash >> 17; + hash ^= hash << 25; + hash += hash >> 6; + return hash; +} + +#define stbiw__zlib_flush() (out = stbiw__zlib_flushf(out, &bitbuf, &bitcount)) +#define stbiw__zlib_add(code,codebits) \ + (bitbuf |= (code) << bitcount, bitcount += (codebits), stbiw__zlib_flush()) +#define stbiw__zlib_huffa(b,c) stbiw__zlib_add(stbiw__zlib_bitrev(b,c),c) +// default huffman tables +#define stbiw__zlib_huff1(n) stbiw__zlib_huffa(0x30 + (n), 8) +#define stbiw__zlib_huff2(n) stbiw__zlib_huffa(0x190 + (n)-144, 9) +#define stbiw__zlib_huff3(n) stbiw__zlib_huffa(0 + (n)-256,7) +#define stbiw__zlib_huff4(n) stbiw__zlib_huffa(0xc0 + (n)-280,8) +#define stbiw__zlib_huff(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : (n) <= 255 ? stbiw__zlib_huff2(n) : (n) <= 279 ? stbiw__zlib_huff3(n) : stbiw__zlib_huff4(n)) +#define stbiw__zlib_huffb(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : stbiw__zlib_huff2(n)) + +#define stbiw__ZHASH 16384 + +#endif // STBIW_ZLIB_COMPRESS + +STBIWDEF unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality) +{ +#ifdef STBIW_ZLIB_COMPRESS + // user provided a zlib compress implementation, use that + return STBIW_ZLIB_COMPRESS(data, data_len, out_len, quality); +#else // use builtin + static unsigned short lengthc[] = { 3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258, 259 }; + static unsigned char lengtheb[]= { 0,0,0,0,0,0,0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 }; + static unsigned short distc[] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577, 32768 }; + static unsigned char disteb[] = { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13 }; + unsigned int bitbuf=0; + int i,j, bitcount=0; + unsigned char *out = NULL; + unsigned char ***hash_table = (unsigned char***) STBIW_MALLOC(stbiw__ZHASH * sizeof(unsigned char**)); + if (hash_table == NULL) + return NULL; + if (quality < 5) quality = 5; + + stbiw__sbpush(out, 0x78); // DEFLATE 32K window + stbiw__sbpush(out, 0x5e); // FLEVEL = 1 + stbiw__zlib_add(1,1); // BFINAL = 1 + stbiw__zlib_add(1,2); // BTYPE = 1 -- fixed huffman + + for (i=0; i < stbiw__ZHASH; ++i) + hash_table[i] = NULL; + + i=0; + while (i < data_len-3) { + // hash next 3 bytes of data to be compressed + int h = stbiw__zhash(data+i)&(stbiw__ZHASH-1), best=3; + unsigned char *bestloc = 0; + unsigned char **hlist = hash_table[h]; + int n = stbiw__sbcount(hlist); + for (j=0; j < n; ++j) { + if (hlist[j]-data > i-32768) { // if entry lies within window + int d = stbiw__zlib_countm(hlist[j], data+i, data_len-i); + if (d >= best) { best=d; bestloc=hlist[j]; } + } + } + // when hash table entry is too long, delete half the entries + if (hash_table[h] && stbiw__sbn(hash_table[h]) == 2*quality) { + STBIW_MEMMOVE(hash_table[h], hash_table[h]+quality, sizeof(hash_table[h][0])*quality); + stbiw__sbn(hash_table[h]) = quality; + } + stbiw__sbpush(hash_table[h],data+i); + + if (bestloc) { + // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal + h = stbiw__zhash(data+i+1)&(stbiw__ZHASH-1); + hlist = hash_table[h]; + n = stbiw__sbcount(hlist); + for (j=0; j < n; ++j) { + if (hlist[j]-data > i-32767) { + int e = stbiw__zlib_countm(hlist[j], data+i+1, data_len-i-1); + if (e > best) { // if next match is better, bail on current match + bestloc = NULL; + break; + } + } + } + } + + if (bestloc) { + int d = (int) (data+i - bestloc); // distance back + STBIW_ASSERT(d <= 32767 && best <= 258); + for (j=0; best > lengthc[j+1]-1; ++j); + stbiw__zlib_huff(j+257); + if (lengtheb[j]) stbiw__zlib_add(best - lengthc[j], lengtheb[j]); + for (j=0; d > distc[j+1]-1; ++j); + stbiw__zlib_add(stbiw__zlib_bitrev(j,5),5); + if (disteb[j]) stbiw__zlib_add(d - distc[j], disteb[j]); + i += best; + } else { + stbiw__zlib_huffb(data[i]); + ++i; + } + } + // write out final bytes + for (;i < data_len; ++i) + stbiw__zlib_huffb(data[i]); + stbiw__zlib_huff(256); // end of block + // pad with 0 bits to byte boundary + while (bitcount) + stbiw__zlib_add(0,1); + + for (i=0; i < stbiw__ZHASH; ++i) + (void) stbiw__sbfree(hash_table[i]); + STBIW_FREE(hash_table); + + // store uncompressed instead if compression was worse + if (stbiw__sbn(out) > data_len + 2 + ((data_len+32766)/32767)*5) { + stbiw__sbn(out) = 2; // truncate to DEFLATE 32K window and FLEVEL = 1 + for (j = 0; j < data_len;) { + int blocklen = data_len - j; + if (blocklen > 32767) blocklen = 32767; + stbiw__sbpush(out, data_len - j == blocklen); // BFINAL = ?, BTYPE = 0 -- no compression + stbiw__sbpush(out, STBIW_UCHAR(blocklen)); // LEN + stbiw__sbpush(out, STBIW_UCHAR(blocklen >> 8)); + stbiw__sbpush(out, STBIW_UCHAR(~blocklen)); // NLEN + stbiw__sbpush(out, STBIW_UCHAR(~blocklen >> 8)); + memcpy(out+stbiw__sbn(out), data+j, blocklen); + stbiw__sbn(out) += blocklen; + j += blocklen; + } + } + + { + // compute adler32 on input + unsigned int s1=1, s2=0; + int blocklen = (int) (data_len % 5552); + j=0; + while (j < data_len) { + for (i=0; i < blocklen; ++i) { s1 += data[j+i]; s2 += s1; } + s1 %= 65521; s2 %= 65521; + j += blocklen; + blocklen = 5552; + } + stbiw__sbpush(out, STBIW_UCHAR(s2 >> 8)); + stbiw__sbpush(out, STBIW_UCHAR(s2)); + stbiw__sbpush(out, STBIW_UCHAR(s1 >> 8)); + stbiw__sbpush(out, STBIW_UCHAR(s1)); + } + *out_len = stbiw__sbn(out); + // make returned pointer freeable + STBIW_MEMMOVE(stbiw__sbraw(out), out, *out_len); + return (unsigned char *) stbiw__sbraw(out); +#endif // STBIW_ZLIB_COMPRESS +} + +static unsigned int stbiw__crc32(unsigned char *buffer, int len) +{ +#ifdef STBIW_CRC32 + return STBIW_CRC32(buffer, len); +#else + static unsigned int crc_table[256] = + { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, + 0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, + 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, + 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, + 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, + 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, + 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, + 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, + 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, + 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, + 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, + 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, + 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, + 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, + 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, + 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, + 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, + 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, + 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, + 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, + 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, + 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, + 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, + 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, + 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, + 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, + 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, + 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D + }; + + unsigned int crc = ~0u; + int i; + for (i=0; i < len; ++i) + crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)]; + return ~crc; +#endif +} + +#define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4) +#define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v)); +#define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3]) + +static void stbiw__wpcrc(unsigned char **data, int len) +{ + unsigned int crc = stbiw__crc32(*data - len - 4, len+4); + stbiw__wp32(*data, crc); +} + +static unsigned char stbiw__paeth(int a, int b, int c) +{ + int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c); + if (pa <= pb && pa <= pc) return STBIW_UCHAR(a); + if (pb <= pc) return STBIW_UCHAR(b); + return STBIW_UCHAR(c); +} + +// @OPTIMIZE: provide an option that always forces left-predict or paeth predict +static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int width, int height, int y, int n, int filter_type, signed char *line_buffer) +{ + static int mapping[] = { 0,1,2,3,4 }; + static int firstmap[] = { 0,1,0,5,6 }; + int *mymap = (y != 0) ? mapping : firstmap; + int i; + int type = mymap[filter_type]; + unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y); + int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; + + if (type==0) { + memcpy(line_buffer, z, width*n); + return; + } + + // first loop isn't optimized since it's just one pixel + for (i = 0; i < n; ++i) { + switch (type) { + case 1: line_buffer[i] = z[i]; break; + case 2: line_buffer[i] = z[i] - z[i-signed_stride]; break; + case 3: line_buffer[i] = z[i] - (z[i-signed_stride]>>1); break; + case 4: line_buffer[i] = (signed char) (z[i] - stbiw__paeth(0,z[i-signed_stride],0)); break; + case 5: line_buffer[i] = z[i]; break; + case 6: line_buffer[i] = z[i]; break; + } + } + switch (type) { + case 1: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-n]; break; + case 2: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-signed_stride]; break; + case 3: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - ((z[i-n] + z[i-signed_stride])>>1); break; + case 4: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], z[i-signed_stride], z[i-signed_stride-n]); break; + case 5: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - (z[i-n]>>1); break; + case 6: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], 0,0); break; + } +} + +STBIWDEF unsigned char *stbi_write_png_to_mem(const unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len) +{ + int force_filter = stbi_write_force_png_filter; + int ctype[5] = { -1, 0, 4, 2, 6 }; + unsigned char sig[8] = { 137,80,78,71,13,10,26,10 }; + unsigned char *out,*o, *filt, *zlib; + signed char *line_buffer; + int j,zlen; + + if (stride_bytes == 0) + stride_bytes = x * n; + + if (force_filter >= 5) { + force_filter = -1; + } + + filt = (unsigned char *) STBIW_MALLOC((x*n+1) * y); if (!filt) return 0; + line_buffer = (signed char *) STBIW_MALLOC(x * n); if (!line_buffer) { STBIW_FREE(filt); return 0; } + for (j=0; j < y; ++j) { + int filter_type; + if (force_filter > -1) { + filter_type = force_filter; + stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, force_filter, line_buffer); + } else { // Estimate the best filter by running through all of them: + int best_filter = 0, best_filter_val = 0x7fffffff, est, i; + for (filter_type = 0; filter_type < 5; filter_type++) { + stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, filter_type, line_buffer); + + // Estimate the entropy of the line using this filter; the less, the better. + est = 0; + for (i = 0; i < x*n; ++i) { + est += abs((signed char) line_buffer[i]); + } + if (est < best_filter_val) { + best_filter_val = est; + best_filter = filter_type; + } + } + if (filter_type != best_filter) { // If the last iteration already got us the best filter, don't redo it + stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, best_filter, line_buffer); + filter_type = best_filter; + } + } + // when we get here, filter_type contains the filter type, and line_buffer contains the data + filt[j*(x*n+1)] = (unsigned char) filter_type; + STBIW_MEMMOVE(filt+j*(x*n+1)+1, line_buffer, x*n); + } + STBIW_FREE(line_buffer); + zlib = stbi_zlib_compress(filt, y*( x*n+1), &zlen, stbi_write_png_compression_level); + STBIW_FREE(filt); + if (!zlib) return 0; + + // each tag requires 12 bytes of overhead + out = (unsigned char *) STBIW_MALLOC(8 + 12+13 + 12+zlen + 12); + if (!out) return 0; + *out_len = 8 + 12+13 + 12+zlen + 12; + + o=out; + STBIW_MEMMOVE(o,sig,8); o+= 8; + stbiw__wp32(o, 13); // header length + stbiw__wptag(o, "IHDR"); + stbiw__wp32(o, x); + stbiw__wp32(o, y); + *o++ = 8; + *o++ = STBIW_UCHAR(ctype[n]); + *o++ = 0; + *o++ = 0; + *o++ = 0; + stbiw__wpcrc(&o,13); + + stbiw__wp32(o, zlen); + stbiw__wptag(o, "IDAT"); + STBIW_MEMMOVE(o, zlib, zlen); + o += zlen; + STBIW_FREE(zlib); + stbiw__wpcrc(&o, zlen); + + stbiw__wp32(o,0); + stbiw__wptag(o, "IEND"); + stbiw__wpcrc(&o,0); + + STBIW_ASSERT(o == out + *out_len); + + return out; +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes) +{ + FILE *f; + int len; + unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); + if (png == NULL) return 0; + + f = stbiw__fopen(filename, "wb"); + if (!f) { STBIW_FREE(png); return 0; } + fwrite(png, 1, len, f); + fclose(f); + STBIW_FREE(png); + return 1; +} +#endif + +STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes) +{ + int len; + unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); + if (png == NULL) return 0; + func(context, png, len); + STBIW_FREE(png); + return 1; +} + + +/* *************************************************************************** + * + * JPEG writer + * + * This is based on Jon Olick's jo_jpeg.cpp: + * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html + */ + +static const unsigned char stbiw__jpg_ZigZag[] = { 0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18, + 24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63 }; + +static void stbiw__jpg_writeBits(stbi__write_context *s, int *bitBufP, int *bitCntP, const unsigned short *bs) { + int bitBuf = *bitBufP, bitCnt = *bitCntP; + bitCnt += bs[1]; + bitBuf |= bs[0] << (24 - bitCnt); + while(bitCnt >= 8) { + unsigned char c = (bitBuf >> 16) & 255; + stbiw__putc(s, c); + if(c == 255) { + stbiw__putc(s, 0); + } + bitBuf <<= 8; + bitCnt -= 8; + } + *bitBufP = bitBuf; + *bitCntP = bitCnt; +} + +static void stbiw__jpg_DCT(float *d0p, float *d1p, float *d2p, float *d3p, float *d4p, float *d5p, float *d6p, float *d7p) { + float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; + float z1, z2, z3, z4, z5, z11, z13; + + float tmp0 = d0 + d7; + float tmp7 = d0 - d7; + float tmp1 = d1 + d6; + float tmp6 = d1 - d6; + float tmp2 = d2 + d5; + float tmp5 = d2 - d5; + float tmp3 = d3 + d4; + float tmp4 = d3 - d4; + + // Even part + float tmp10 = tmp0 + tmp3; // phase 2 + float tmp13 = tmp0 - tmp3; + float tmp11 = tmp1 + tmp2; + float tmp12 = tmp1 - tmp2; + + d0 = tmp10 + tmp11; // phase 3 + d4 = tmp10 - tmp11; + + z1 = (tmp12 + tmp13) * 0.707106781f; // c4 + d2 = tmp13 + z1; // phase 5 + d6 = tmp13 - z1; + + // Odd part + tmp10 = tmp4 + tmp5; // phase 2 + tmp11 = tmp5 + tmp6; + tmp12 = tmp6 + tmp7; + + // The rotator is modified from fig 4-8 to avoid extra negations. + z5 = (tmp10 - tmp12) * 0.382683433f; // c6 + z2 = tmp10 * 0.541196100f + z5; // c2-c6 + z4 = tmp12 * 1.306562965f + z5; // c2+c6 + z3 = tmp11 * 0.707106781f; // c4 + + z11 = tmp7 + z3; // phase 5 + z13 = tmp7 - z3; + + *d5p = z13 + z2; // phase 6 + *d3p = z13 - z2; + *d1p = z11 + z4; + *d7p = z11 - z4; + + *d0p = d0; *d2p = d2; *d4p = d4; *d6p = d6; +} + +static void stbiw__jpg_calcBits(int val, unsigned short bits[2]) { + int tmp1 = val < 0 ? -val : val; + val = val < 0 ? val-1 : val; + bits[1] = 1; + while(tmp1 >>= 1) { + ++bits[1]; + } + bits[0] = val & ((1<0)&&(DU[end0pos]==0); --end0pos) { + } + // end0pos = first element in reverse order !=0 + if(end0pos == 0) { + stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); + return DU[0]; + } + for(i = 1; i <= end0pos; ++i) { + int startpos = i; + int nrzeroes; + unsigned short bits[2]; + for (; DU[i]==0 && i<=end0pos; ++i) { + } + nrzeroes = i-startpos; + if ( nrzeroes >= 16 ) { + int lng = nrzeroes>>4; + int nrmarker; + for (nrmarker=1; nrmarker <= lng; ++nrmarker) + stbiw__jpg_writeBits(s, bitBuf, bitCnt, M16zeroes); + nrzeroes &= 15; + } + stbiw__jpg_calcBits(DU[i], bits); + stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTAC[(nrzeroes<<4)+bits[1]]); + stbiw__jpg_writeBits(s, bitBuf, bitCnt, bits); + } + if(end0pos != 63) { + stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); + } + return DU[0]; +} + +static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, int comp, const void* data, int quality) { + // Constants that don't pollute global namespace + static const unsigned char std_dc_luminance_nrcodes[] = {0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0}; + static const unsigned char std_dc_luminance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; + static const unsigned char std_ac_luminance_nrcodes[] = {0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d}; + static const unsigned char std_ac_luminance_values[] = { + 0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08, + 0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28, + 0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59, + 0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89, + 0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6, + 0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2, + 0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa + }; + static const unsigned char std_dc_chrominance_nrcodes[] = {0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0}; + static const unsigned char std_dc_chrominance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; + static const unsigned char std_ac_chrominance_nrcodes[] = {0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77}; + static const unsigned char std_ac_chrominance_values[] = { + 0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91, + 0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26, + 0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58, + 0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87, + 0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4, + 0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda, + 0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa + }; + // Huffman tables + static const unsigned short YDC_HT[256][2] = { {0,2},{2,3},{3,3},{4,3},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}}; + static const unsigned short UVDC_HT[256][2] = { {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9},{1022,10},{2046,11}}; + static const unsigned short YAC_HT[256][2] = { + {10,4},{0,2},{1,2},{4,3},{11,4},{26,5},{120,7},{248,8},{1014,10},{65410,16},{65411,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {12,4},{27,5},{121,7},{502,9},{2038,11},{65412,16},{65413,16},{65414,16},{65415,16},{65416,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {28,5},{249,8},{1015,10},{4084,12},{65417,16},{65418,16},{65419,16},{65420,16},{65421,16},{65422,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {58,6},{503,9},{4085,12},{65423,16},{65424,16},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {59,6},{1016,10},{65430,16},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {122,7},{2039,11},{65438,16},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {123,7},{4086,12},{65446,16},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {250,8},{4087,12},{65454,16},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {504,9},{32704,15},{65462,16},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {505,9},{65470,16},{65471,16},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {506,9},{65479,16},{65480,16},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1017,10},{65488,16},{65489,16},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1018,10},{65497,16},{65498,16},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2040,11},{65506,16},{65507,16},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {65515,16},{65516,16},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2041,11},{65525,16},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} + }; + static const unsigned short UVAC_HT[256][2] = { + {0,2},{1,2},{4,3},{10,4},{24,5},{25,5},{56,6},{120,7},{500,9},{1014,10},{4084,12},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {11,4},{57,6},{246,8},{501,9},{2038,11},{4085,12},{65416,16},{65417,16},{65418,16},{65419,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {26,5},{247,8},{1015,10},{4086,12},{32706,15},{65420,16},{65421,16},{65422,16},{65423,16},{65424,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {27,5},{248,8},{1016,10},{4087,12},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{65430,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {58,6},{502,9},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{65438,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {59,6},{1017,10},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{65446,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {121,7},{2039,11},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{65454,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {122,7},{2040,11},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{65462,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {249,8},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{65470,16},{65471,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {503,9},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{65479,16},{65480,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {504,9},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{65488,16},{65489,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {505,9},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{65497,16},{65498,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {506,9},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{65506,16},{65507,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2041,11},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{65515,16},{65516,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {16352,14},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{65525,16},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1018,10},{32707,15},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} + }; + static const int YQT[] = {16,11,10,16,24,40,51,61,12,12,14,19,26,58,60,55,14,13,16,24,40,57,69,56,14,17,22,29,51,87,80,62,18,22, + 37,56,68,109,103,77,24,35,55,64,81,104,113,92,49,64,78,87,103,121,120,101,72,92,95,98,112,100,103,99}; + static const int UVQT[] = {17,18,24,47,99,99,99,99,18,21,26,66,99,99,99,99,24,26,56,99,99,99,99,99,47,66,99,99,99,99,99,99, + 99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99}; + static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f, + 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f }; + + int row, col, i, k, subsample; + float fdtbl_Y[64], fdtbl_UV[64]; + unsigned char YTable[64], UVTable[64]; + + if(!data || !width || !height || comp > 4 || comp < 1) { + return 0; + } + + quality = quality ? quality : 90; + subsample = quality <= 90 ? 1 : 0; + quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; + quality = quality < 50 ? 5000 / quality : 200 - quality * 2; + + for(i = 0; i < 64; ++i) { + int uvti, yti = (YQT[i]*quality+50)/100; + YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (yti < 1 ? 1 : yti > 255 ? 255 : yti); + uvti = (UVQT[i]*quality+50)/100; + UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (uvti < 1 ? 1 : uvti > 255 ? 255 : uvti); + } + + for(row = 0, k = 0; row < 8; ++row) { + for(col = 0; col < 8; ++col, ++k) { + fdtbl_Y[k] = 1 / (YTable [stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); + fdtbl_UV[k] = 1 / (UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); + } + } + + // Write Headers + { + static const unsigned char head0[] = { 0xFF,0xD8,0xFF,0xE0,0,0x10,'J','F','I','F',0,1,1,0,0,1,0,1,0,0,0xFF,0xDB,0,0x84,0 }; + static const unsigned char head2[] = { 0xFF,0xDA,0,0xC,3,1,0,2,0x11,3,0x11,0,0x3F,0 }; + const unsigned char head1[] = { 0xFF,0xC0,0,0x11,8,(unsigned char)(height>>8),STBIW_UCHAR(height),(unsigned char)(width>>8),STBIW_UCHAR(width), + 3,1,(unsigned char)(subsample?0x22:0x11),0,2,0x11,1,3,0x11,1,0xFF,0xC4,0x01,0xA2,0 }; + s->func(s->context, (void*)head0, sizeof(head0)); + s->func(s->context, (void*)YTable, sizeof(YTable)); + stbiw__putc(s, 1); + s->func(s->context, UVTable, sizeof(UVTable)); + s->func(s->context, (void*)head1, sizeof(head1)); + s->func(s->context, (void*)(std_dc_luminance_nrcodes+1), sizeof(std_dc_luminance_nrcodes)-1); + s->func(s->context, (void*)std_dc_luminance_values, sizeof(std_dc_luminance_values)); + stbiw__putc(s, 0x10); // HTYACinfo + s->func(s->context, (void*)(std_ac_luminance_nrcodes+1), sizeof(std_ac_luminance_nrcodes)-1); + s->func(s->context, (void*)std_ac_luminance_values, sizeof(std_ac_luminance_values)); + stbiw__putc(s, 1); // HTUDCinfo + s->func(s->context, (void*)(std_dc_chrominance_nrcodes+1), sizeof(std_dc_chrominance_nrcodes)-1); + s->func(s->context, (void*)std_dc_chrominance_values, sizeof(std_dc_chrominance_values)); + stbiw__putc(s, 0x11); // HTUACinfo + s->func(s->context, (void*)(std_ac_chrominance_nrcodes+1), sizeof(std_ac_chrominance_nrcodes)-1); + s->func(s->context, (void*)std_ac_chrominance_values, sizeof(std_ac_chrominance_values)); + s->func(s->context, (void*)head2, sizeof(head2)); + } + + // Encode 8x8 macroblocks + { + static const unsigned short fillBits[] = {0x7F, 7}; + int DCY=0, DCU=0, DCV=0; + int bitBuf=0, bitCnt=0; + // comp == 2 is grey+alpha (alpha is ignored) + int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; + const unsigned char *dataR = (const unsigned char *)data; + const unsigned char *dataG = dataR + ofsG; + const unsigned char *dataB = dataR + ofsB; + int x, y, pos; + if(subsample) { + for(y = 0; y < height; y += 16) { + for(x = 0; x < width; x += 16) { + float Y[256], U[256], V[256]; + for(row = y, pos = 0; row < y+16; ++row) { + // row >= height => use last input row + int clamped_row = (row < height) ? row : height - 1; + int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp; + for(col = x; col < x+16; ++col, ++pos) { + // if col >= width => use pixel from last input column + int p = base_p + ((col < width) ? col : (width-1))*comp; + float r = dataR[p], g = dataG[p], b = dataB[p]; + Y[pos]= +0.29900f*r + 0.58700f*g + 0.11400f*b - 128; + U[pos]= -0.16874f*r - 0.33126f*g + 0.50000f*b; + V[pos]= +0.50000f*r - 0.41869f*g - 0.08131f*b; + } + } + DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+0, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); + DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+8, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); + DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+128, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); + DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+136, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); + + // subsample U,V + { + float subU[64], subV[64]; + int yy, xx; + for(yy = 0, pos = 0; yy < 8; ++yy) { + for(xx = 0; xx < 8; ++xx, ++pos) { + int j = yy*32+xx*2; + subU[pos] = (U[j+0] + U[j+1] + U[j+16] + U[j+17]) * 0.25f; + subV[pos] = (V[j+0] + V[j+1] + V[j+16] + V[j+17]) * 0.25f; + } + } + DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, subU, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT); + DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, subV, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT); + } + } + } + } else { + for(y = 0; y < height; y += 8) { + for(x = 0; x < width; x += 8) { + float Y[64], U[64], V[64]; + for(row = y, pos = 0; row < y+8; ++row) { + // row >= height => use last input row + int clamped_row = (row < height) ? row : height - 1; + int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp; + for(col = x; col < x+8; ++col, ++pos) { + // if col >= width => use pixel from last input column + int p = base_p + ((col < width) ? col : (width-1))*comp; + float r = dataR[p], g = dataG[p], b = dataB[p]; + Y[pos]= +0.29900f*r + 0.58700f*g + 0.11400f*b - 128; + U[pos]= -0.16874f*r - 0.33126f*g + 0.50000f*b; + V[pos]= +0.50000f*r - 0.41869f*g - 0.08131f*b; + } + } + + DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y, 8, fdtbl_Y, DCY, YDC_HT, YAC_HT); + DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, U, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT); + DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, V, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT); + } + } + } + + // Do the bit alignment of the EOI marker + stbiw__jpg_writeBits(s, &bitBuf, &bitCnt, fillBits); + } + + // EOI + stbiw__putc(s, 0xFF); + stbiw__putc(s, 0xD9); + + return 1; +} + +STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality) +{ + stbi__write_context s = { 0 }; + stbi__start_write_callbacks(&s, func, context); + return stbi_write_jpg_core(&s, x, y, comp, (void *) data, quality); +} + + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality) +{ + stbi__write_context s = { 0 }; + if (stbi__start_write_file(&s,filename)) { + int r = stbi_write_jpg_core(&s, x, y, comp, data, quality); + stbi__end_write_file(&s); + return r; + } else + return 0; +} +#endif + +#endif // STB_IMAGE_WRITE_IMPLEMENTATION + +/* Revision history + 1.16 (2021-07-11) + make Deflate code emit uncompressed blocks when it would otherwise expand + support writing BMPs with alpha channel + 1.15 (2020-07-13) unknown + 1.14 (2020-02-02) updated JPEG writer to downsample chroma channels + 1.13 + 1.12 + 1.11 (2019-08-11) + + 1.10 (2019-02-07) + support utf8 filenames in Windows; fix warnings and platform ifdefs + 1.09 (2018-02-11) + fix typo in zlib quality API, improve STB_I_W_STATIC in C++ + 1.08 (2018-01-29) + add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter + 1.07 (2017-07-24) + doc fix + 1.06 (2017-07-23) + writing JPEG (using Jon Olick's code) + 1.05 ??? + 1.04 (2017-03-03) + monochrome BMP expansion + 1.03 ??? + 1.02 (2016-04-02) + avoid allocating large structures on the stack + 1.01 (2016-01-16) + STBIW_REALLOC_SIZED: support allocators with no realloc support + avoid race-condition in crc initialization + minor compile issues + 1.00 (2015-09-14) + installable file IO function + 0.99 (2015-09-13) + warning fixes; TGA rle support + 0.98 (2015-04-08) + added STBIW_MALLOC, STBIW_ASSERT etc + 0.97 (2015-01-18) + fixed HDR asserts, rewrote HDR rle logic + 0.96 (2015-01-17) + add HDR output + fix monochrome BMP + 0.95 (2014-08-17) + add monochrome TGA output + 0.94 (2014-05-31) + rename private functions to avoid conflicts with stb_image.h + 0.93 (2014-05-27) + warning fixes + 0.92 (2010-08-01) + casts to unsigned char to fix warnings + 0.91 (2010-07-17) + first public release + 0.90 first internal release +*/ + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ diff --git a/src/test/efsw-test.c b/src/test/efsw-test.c new file mode 100644 index 0000000..143f35f --- /dev/null +++ b/src/test/efsw-test.c @@ -0,0 +1,164 @@ +#include + +#include +#include +#include +#include +#include +#include + +#ifdef _WIN32 +#include +#else +#include +#endif + +const char PATH_SEPARATOR = +#ifdef _WIN32 + '\\'; +#else + '/'; +#endif + +bool STOP = false; + +void sigend( int sig ) { + printf( "Bye bye" ); + STOP = true; +} + +void sleepMsecs( int msecs ) { +#ifdef _WIN32 + Sleep( msecs ); +#else + sleep( msecs ); +#endif +} + +const char* getActionName( enum efsw_action action ) { + switch ( action ) { + case EFSW_ADD: + return "Add"; + case EFSW_MODIFIED: + return "Modified"; + case EFSW_DELETE: + return "Delete"; + case EFSW_MOVED: + return "Moved"; + default: + return "Bad Action"; + } +} + +void handleFileAction( efsw_watcher watcher, efsw_watchid watchid, const char* dir, + const char* filename, enum efsw_action action, const char* oldFilename, + void* param ) { + if ( strlen( oldFilename ) == 0 ) { + printf( "Watch ID %ld DIR (%s) FILE (%s) has event %s\n", watchid, dir, filename, + getActionName( action ) ); + } else { + printf( "Watch ID %ld DIR (%s) FILE (from file %s to %s) has event %s\n", watchid, dir, + oldFilename, filename, getActionName( action ) ); + } +} + +efsw_watchid handleWatchID( efsw_watchid watchid ) { + switch ( watchid ) { + case EFSW_NOTFOUND: + case EFSW_REPEATED: + case EFSW_OUTOFSCOPE: + case EFSW_REMOTE: + case EFSW_WATCHER_FAILED: + case EFSW_UNSPECIFIED: { + printf( "%s\n", efsw_getlasterror() ); + break; + } + default: { + printf( "Added WatchID: %ld\n", watchid ); + } + } + + return watchid; +} + +int main( int argc, char** argv ) { + signal( SIGABRT, sigend ); + signal( SIGINT, sigend ); + signal( SIGTERM, sigend ); + + printf( "Press ^C to exit demo\n" ); + + bool commonTest = true; + bool useGeneric = false; + char* path = 0; + + if ( argc >= 2 ) { + path = argv[1]; + + struct stat s; + if ( stat( path, &s ) == 0 && ( s.st_mode & S_IFDIR ) == S_IFDIR ) { + commonTest = false; + } + + if ( argc >= 3 ) { + if ( strcmp( argv[2], "true" ) == 0 ) { + useGeneric = true; + } + } + } + + /// create the file watcher object + efsw_watcher fileWatcher = efsw_create( useGeneric ); + efsw_follow_symlinks( fileWatcher, false ); + efsw_allow_outofscopelinks( fileWatcher, false ); + + if ( commonTest ) { + char cwd[256]; + getcwd( cwd, sizeof( cwd ) ); + printf( "CurPath: %s\n", cwd ); + + /// starts watching + efsw_watch( fileWatcher ); + + /// add a watch to the system + char path1[512]; + snprintf( path1, sizeof( path1 ), "%s%ctest", cwd, PATH_SEPARATOR ); + handleWatchID( efsw_addwatch_withoptions( fileWatcher, path1, handleFileAction, true, 0, 0, + 0, NULL ) ); + + /// adds another watch after started watching... + sleepMsecs( 100 ); + + char path2[512]; + snprintf( path2, sizeof( path2 ), "%s%ctest2", cwd, PATH_SEPARATOR ); + efsw_watchid watchID = handleWatchID( efsw_addwatch_withoptions( + fileWatcher, path2, handleFileAction, true, 0, 0, 0, NULL ) ); + + /// delete the watch + if ( watchID > 0 ) { + sleepMsecs( 1000 ); + efsw_removewatch_byid( fileWatcher, watchID ); + } + } else { + if ( efsw_addwatch( fileWatcher, path, handleFileAction, true, 0 ) > 0 ) { + efsw_watch( fileWatcher ); + + printf( "Watching directory: %s\n", path ); + + if ( useGeneric ) { + printf( "Using generic backend watcher\n" ); + } + } else { + printf( "Error trying to watch directory: %s\n", path ); + printf( "%s\n", efsw_getlasterror() ); + } + } + + while ( !STOP ) { + sleepMsecs( 100 ); + } + + efsw_release( fileWatcher ); + + return 0; +} diff --git a/src/test/efsw-test.cpp b/src/test/efsw-test.cpp new file mode 100644 index 0000000..04e2774 --- /dev/null +++ b/src/test/efsw-test.cpp @@ -0,0 +1,139 @@ +#include +#include +#include +#include +#include + +bool STOP = false; + +void sigend( int ) { + std::cout << std::endl << "Bye bye" << std::endl; + STOP = true; +} + +/// Processes a file action +class UpdateListener : public efsw::FileWatchListener { + public: + UpdateListener() {} + + std::string getActionName( efsw::Action action ) { + switch ( action ) { + case efsw::Actions::Add: + return "Add"; + case efsw::Actions::Modified: + return "Modified"; + case efsw::Actions::Delete: + return "Delete"; + case efsw::Actions::Moved: + return "Moved"; + default: + return "Bad Action"; + } + } + + void handleFileAction( efsw::WatchID watchid, const std::string& dir, + const std::string& filename, efsw::Action action, + std::string oldFilename = "" ) override { + std::cout << "Watch ID " << watchid << " DIR (" + << dir + ") FILE (" + + ( oldFilename.empty() ? "" : "from file " + oldFilename + " to " ) + + filename + ") has event " + << getActionName( action ) << std::endl; + } +}; + +efsw::WatchID handleWatchID( efsw::WatchID watchid ) { + switch ( watchid ) { + case efsw::Errors::FileNotFound: + case efsw::Errors::FileRepeated: + case efsw::Errors::FileOutOfScope: + case efsw::Errors::FileRemote: + case efsw::Errors::WatcherFailed: + case efsw::Errors::Unspecified: { + std::cout << efsw::Errors::Log::getLastErrorLog().c_str() << std::endl; + break; + } + default: { + std::cout << "Added WatchID: " << watchid << std::endl; + } + } + + return watchid; +} + +int main( int argc, char** argv ) { + signal( SIGABRT, sigend ); + signal( SIGINT, sigend ); + signal( SIGTERM, sigend ); + + std::cout << "Press ^C to exit demo" << std::endl; + + bool commonTest = true; + bool useGeneric = false; + std::string path; + + if ( argc >= 2 ) { + path = std::string( argv[1] ); + + if ( efsw::FileSystem::isDirectory( path ) ) { + commonTest = false; + } + + if ( argc >= 3 ) { + if ( std::string( argv[2] ) == "true" ) { + useGeneric = true; + } + } + } + + UpdateListener* ul = new UpdateListener(); + + /// create the file watcher object + efsw::FileWatcher fileWatcher( useGeneric ); + + fileWatcher.followSymlinks( false ); + fileWatcher.allowOutOfScopeLinks( false ); + + if ( commonTest ) { + std::string CurPath( efsw::System::getProcessPath() ); + + std::cout << "CurPath: " << CurPath.c_str() << std::endl; + + /// starts watching + fileWatcher.watch(); + + /// add a watch to the system + handleWatchID( fileWatcher.addWatch( CurPath + "test", ul, true ) ); + + /// adds another watch after started watching... + efsw::System::sleep( 100 ); + + efsw::WatchID watchID = + handleWatchID( fileWatcher.addWatch( CurPath + "test2", ul, true ) ); + + /// delete the watch + if ( watchID > 0 ) { + efsw::System::sleep( 1000 ); + fileWatcher.removeWatch( watchID ); + } + } else { + if ( fileWatcher.addWatch( path, ul, true ) > 0 ) { + fileWatcher.watch(); + + std::cout << "Watching directory: " << path.c_str() << std::endl; + + if ( useGeneric ) { + std::cout << "Using generic backend watcher" << std::endl; + } + } else { + std::cout << "Error trying to watch directory: " << path.c_str() << std::endl; + std::cout << efsw::Errors::Log::getLastErrorLog().c_str() << std::endl; + } + } + + while ( !STOP ) { + efsw::System::sleep( 100 ); + } + + return 0; +}