зеркало из https://github.com/mozilla/gecko-dev.git
Bug 1398021 - Update lz4 to version 1.8.0. r=froydnj
This commit is contained in:
Ryan VanderMeulen
Родитель
92447ea729
Коммит
909ebdebd8
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@ -36,7 +36,8 @@ LZ4::compress(const char* aSource, size_t aInputSize, char* aDest)
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{
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CheckedInt<int> inputSizeChecked = aInputSize;
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MOZ_ASSERT(inputSizeChecked.isValid());
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return LZ4_compress(aSource, aDest, inputSizeChecked.value());
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return LZ4_compress_default(aSource, aDest, inputSizeChecked.value(),
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LZ4_compressBound(inputSizeChecked.value()));
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}
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size_t
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@ -47,8 +48,8 @@ LZ4::compressLimitedOutput(const char* aSource, size_t aInputSize, char* aDest,
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MOZ_ASSERT(inputSizeChecked.isValid());
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CheckedInt<int> maxOutputSizeChecked = aMaxOutputSize;
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MOZ_ASSERT(maxOutputSizeChecked.isValid());
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return LZ4_compress_limitedOutput(aSource, aDest, inputSizeChecked.value(),
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maxOutputSizeChecked.value());
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return LZ4_compress_default(aSource, aDest, inputSizeChecked.value(),
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maxOutputSizeChecked.value());
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}
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bool
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1613
mfbt/lz4.c
1613
mfbt/lz4.c
Разница между файлами не показана из-за своего большого размера
Загрузить разницу
533
mfbt/lz4.h
533
mfbt/lz4.h
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@ -1,7 +1,8 @@
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/*
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LZ4 - Fast LZ compression algorithm
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Header File
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Copyright (C) 2011-2014, Yann Collet.
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* LZ4 - Fast LZ compression algorithm
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* Header File
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* Copyright (C) 2011-2017, Yann Collet.
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BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
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Redistribution and use in source and binary forms, with or without
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@ -28,247 +29,433 @@
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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You can contact the author at :
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- LZ4 source repository : http://code.google.com/p/lz4/
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- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
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- LZ4 homepage : http://www.lz4.org
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- LZ4 source repository : https://github.com/lz4/lz4
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*/
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#pragma once
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#if defined (__cplusplus)
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extern "C" {
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#endif
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#ifndef LZ4_H_2983827168210
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#define LZ4_H_2983827168210
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/**************************************
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Version
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**************************************/
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#define LZ4_VERSION_MAJOR 1 /* for major interface/format changes */
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#define LZ4_VERSION_MINOR 2 /* for minor interface/format changes */
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/* --- Dependency --- */
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#include <stddef.h> /* size_t */
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/**
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Introduction
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LZ4 is lossless compression algorithm, providing compression speed at 400 MB/s per core,
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scalable with multi-cores CPU. It features an extremely fast decoder, with speed in
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multiple GB/s per core, typically reaching RAM speed limits on multi-core systems.
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The LZ4 compression library provides in-memory compression and decompression functions.
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Compression can be done in:
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- a single step (described as Simple Functions)
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- a single step, reusing a context (described in Advanced Functions)
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- unbounded multiple steps (described as Streaming compression)
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lz4.h provides block compression functions. It gives full buffer control to user.
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Decompressing an lz4-compressed block also requires metadata (such as compressed size).
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Each application is free to encode such metadata in whichever way it wants.
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An additional format, called LZ4 frame specification (doc/lz4_Frame_format.md),
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take care of encoding standard metadata alongside LZ4-compressed blocks.
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If your application requires interoperability, it's recommended to use it.
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A library is provided to take care of it, see lz4frame.h.
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*/
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/*^***************************************************************
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* Export parameters
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*****************************************************************/
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/*
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* LZ4_DLL_EXPORT :
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* Enable exporting of functions when building a Windows DLL
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* LZ4LIB_API :
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* Control library symbols visibility.
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*/
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#if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
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# define LZ4LIB_API __declspec(dllexport)
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#elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
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# define LZ4LIB_API __declspec(dllimport) /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/
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#elif defined(__GNUC__) && (__GNUC__ >= 4)
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# define LZ4LIB_API __attribute__ ((__visibility__ ("default")))
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#else
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# define LZ4LIB_API
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#endif
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/*------ Version ------*/
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#define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */
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#define LZ4_VERSION_MINOR 8 /* for new (non-breaking) interface capabilities */
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#define LZ4_VERSION_RELEASE 0 /* for tweaks, bug-fixes, or development */
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#define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
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/**************************************
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Tuning parameter
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#define LZ4_LIB_VERSION LZ4_VERSION_MAJOR.LZ4_VERSION_MINOR.LZ4_VERSION_RELEASE
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#define LZ4_QUOTE(str) #str
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#define LZ4_EXPAND_AND_QUOTE(str) LZ4_QUOTE(str)
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#define LZ4_VERSION_STRING LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)
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LZ4LIB_API int LZ4_versionNumber (void); /**< library version number; to be used when checking dll version */
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LZ4LIB_API const char* LZ4_versionString (void); /**< library version string; to be used when checking dll version */
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/*-************************************
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* Tuning parameter
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**************************************/
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/*
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/*!
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* LZ4_MEMORY_USAGE :
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* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
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* Increasing memory usage improves compression ratio
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* Reduced memory usage can improve speed, due to cache effect
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* Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
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*/
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#define LZ4_MEMORY_USAGE 14
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#ifndef LZ4_MEMORY_USAGE
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# define LZ4_MEMORY_USAGE 14
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#endif
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/**************************************
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Simple Functions
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/*-************************************
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* Simple Functions
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**************************************/
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/*! LZ4_compress_default() :
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Compresses 'sourceSize' bytes from buffer 'source'
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into already allocated 'dest' buffer of size 'maxDestSize'.
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Compression is guaranteed to succeed if 'maxDestSize' >= LZ4_compressBound(sourceSize).
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It also runs faster, so it's a recommended setting.
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If the function cannot compress 'source' into a more limited 'dest' budget,
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compression stops *immediately*, and the function result is zero.
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As a consequence, 'dest' content is not valid.
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This function never writes outside 'dest' buffer, nor read outside 'source' buffer.
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sourceSize : Max supported value is LZ4_MAX_INPUT_VALUE
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maxDestSize : full or partial size of buffer 'dest' (which must be already allocated)
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return : the number of bytes written into buffer 'dest' (necessarily <= maxOutputSize)
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or 0 if compression fails */
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LZ4LIB_API int LZ4_compress_default(const char* source, char* dest, int sourceSize, int maxDestSize);
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int LZ4_compress (const char* source, char* dest, int inputSize);
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int LZ4_decompress_safe (const char* source, char* dest, int compressedSize, int maxOutputSize);
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/*
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LZ4_compress() :
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Compresses 'inputSize' bytes from 'source' into 'dest'.
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Destination buffer must be already allocated,
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and must be sized to handle worst cases situations (input data not compressible)
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Worst case size evaluation is provided by function LZ4_compressBound()
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inputSize : Max supported value is LZ4_MAX_INPUT_VALUE
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return : the number of bytes written in buffer dest
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or 0 if the compression fails
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LZ4_decompress_safe() :
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compressedSize : is obviously the source size
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maxOutputSize : is the size of the destination buffer, which must be already allocated.
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return : the number of bytes decoded in the destination buffer (necessarily <= maxOutputSize)
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If the destination buffer is not large enough, decoding will stop and output an error code (<0).
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/*! LZ4_decompress_safe() :
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compressedSize : is the precise full size of the compressed block.
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maxDecompressedSize : is the size of destination buffer, which must be already allocated.
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return : the number of bytes decompressed into destination buffer (necessarily <= maxDecompressedSize)
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If destination buffer is not large enough, decoding will stop and output an error code (<0).
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If the source stream is detected malformed, the function will stop decoding and return a negative result.
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This function is protected against buffer overflow exploits :
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it never writes outside of output buffer, and never reads outside of input buffer.
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Therefore, it is protected against malicious data packets.
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This function is protected against buffer overflow exploits, including malicious data packets.
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It never writes outside output buffer, nor reads outside input buffer.
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*/
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LZ4LIB_API int LZ4_decompress_safe (const char* source, char* dest, int compressedSize, int maxDecompressedSize);
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/*
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Note :
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Should you prefer to explicitly allocate compression-table memory using your own allocation method,
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use the streaming functions provided below, simply reset the memory area between each call to LZ4_compress_continue()
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*/
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/**************************************
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Advanced Functions
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/*-************************************
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* Advanced Functions
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**************************************/
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#define LZ4_MAX_INPUT_SIZE 0x7E000000 /* 2 113 929 216 bytes */
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#define LZ4_COMPRESSBOUND(isize) ((unsigned int)(isize) > (unsigned int)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
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#define LZ4_COMPRESSBOUND(isize) ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
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/*
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/*!
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LZ4_compressBound() :
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Provides the maximum size that LZ4 may output in a "worst case" scenario (input data not compressible)
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primarily useful for memory allocation of output buffer.
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macro is also provided when result needs to be evaluated at compilation (such as stack memory allocation).
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isize : is the input size. Max supported value is LZ4_MAX_INPUT_SIZE
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return : maximum output size in a "worst case" scenario
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or 0, if input size is too large ( > LZ4_MAX_INPUT_SIZE)
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Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible)
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This function is primarily useful for memory allocation purposes (destination buffer size).
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Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example).
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Note that LZ4_compress_default() compress faster when dest buffer size is >= LZ4_compressBound(srcSize)
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inputSize : max supported value is LZ4_MAX_INPUT_SIZE
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return : maximum output size in a "worst case" scenario
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or 0, if input size is too large ( > LZ4_MAX_INPUT_SIZE)
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*/
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int LZ4_compressBound(int isize);
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LZ4LIB_API int LZ4_compressBound(int inputSize);
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/*
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LZ4_compress_limitedOutput() :
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Compress 'inputSize' bytes from 'source' into an output buffer 'dest' of maximum size 'maxOutputSize'.
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If it cannot achieve it, compression will stop, and result of the function will be zero.
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This function never writes outside of provided output buffer.
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inputSize : Max supported value is LZ4_MAX_INPUT_VALUE
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maxOutputSize : is the size of the destination buffer (which must be already allocated)
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return : the number of bytes written in buffer 'dest'
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or 0 if the compression fails
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/*!
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LZ4_compress_fast() :
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Same as LZ4_compress_default(), but allows to select an "acceleration" factor.
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The larger the acceleration value, the faster the algorithm, but also the lesser the compression.
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It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed.
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An acceleration value of "1" is the same as regular LZ4_compress_default()
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Values <= 0 will be replaced by ACCELERATION_DEFAULT (see lz4.c), which is 1.
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*/
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int LZ4_compress_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize);
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LZ4LIB_API int LZ4_compress_fast (const char* source, char* dest, int sourceSize, int maxDestSize, int acceleration);
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/*
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/*!
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LZ4_compress_fast_extState() :
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Same compression function, just using an externally allocated memory space to store compression state.
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Use LZ4_sizeofState() to know how much memory must be allocated,
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and allocate it on 8-bytes boundaries (using malloc() typically).
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Then, provide it as 'void* state' to compression function.
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*/
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LZ4LIB_API int LZ4_sizeofState(void);
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LZ4LIB_API int LZ4_compress_fast_extState (void* state, const char* source, char* dest, int inputSize, int maxDestSize, int acceleration);
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/*!
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LZ4_compress_destSize() :
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Reverse the logic, by compressing as much data as possible from 'source' buffer
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into already allocated buffer 'dest' of size 'targetDestSize'.
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This function either compresses the entire 'source' content into 'dest' if it's large enough,
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or fill 'dest' buffer completely with as much data as possible from 'source'.
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*sourceSizePtr : will be modified to indicate how many bytes where read from 'source' to fill 'dest'.
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New value is necessarily <= old value.
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return : Nb bytes written into 'dest' (necessarily <= targetDestSize)
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or 0 if compression fails
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*/
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LZ4LIB_API int LZ4_compress_destSize (const char* source, char* dest, int* sourceSizePtr, int targetDestSize);
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/*!
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LZ4_decompress_fast() :
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originalSize : is the original and therefore uncompressed size
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return : the number of bytes read from the source buffer (in other words, the compressed size)
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If the source stream is malformed, the function will stop decoding and return a negative result.
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If the source stream is detected malformed, the function will stop decoding and return a negative result.
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Destination buffer must be already allocated. Its size must be a minimum of 'originalSize' bytes.
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note : This function is a bit faster than LZ4_decompress_safe()
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It provides fast decompression and fully respect memory boundaries for properly formed compressed data.
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It does not provide full protection against intentionnally modified data stream.
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Use this function in a trusted environment (data to decode comes from a trusted source).
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note : This function fully respect memory boundaries for properly formed compressed data.
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It is a bit faster than LZ4_decompress_safe().
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However, it does not provide any protection against intentionally modified data stream (malicious input).
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Use this function in trusted environment only (data to decode comes from a trusted source).
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*/
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int LZ4_decompress_fast (const char* source, char* dest, int originalSize);
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LZ4LIB_API int LZ4_decompress_fast (const char* source, char* dest, int originalSize);
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/*
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/*!
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LZ4_decompress_safe_partial() :
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This function decompress a compressed block of size 'compressedSize' at position 'source'
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into output buffer 'dest' of size 'maxOutputSize'.
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into destination buffer 'dest' of size 'maxDecompressedSize'.
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The function tries to stop decompressing operation as soon as 'targetOutputSize' has been reached,
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reducing decompression time.
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return : the number of bytes decoded in the destination buffer (necessarily <= maxOutputSize)
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return : the number of bytes decoded in the destination buffer (necessarily <= maxDecompressedSize)
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Note : this number can be < 'targetOutputSize' should the compressed block to decode be smaller.
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Always control how many bytes were decoded.
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If the source stream is detected malformed, the function will stop decoding and return a negative result.
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This function never writes outside of output buffer, and never reads outside of input buffer. It is therefore protected against malicious data packets
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*/
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int LZ4_decompress_safe_partial (const char* source, char* dest, int compressedSize, int targetOutputSize, int maxOutputSize);
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LZ4LIB_API int LZ4_decompress_safe_partial (const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize);
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/***********************************************
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Experimental Streaming Compression Functions
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/*-*********************************************
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* Streaming Compression Functions
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***********************************************/
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typedef union LZ4_stream_u LZ4_stream_t; /* incomplete type (defined later) */
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#define LZ4_STREAMSIZE_U32 ((1 << (LZ4_MEMORY_USAGE-2)) + 8)
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#define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U32 * sizeof(unsigned int))
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/*
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* LZ4_stream_t
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* information structure to track an LZ4 stream.
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* important : set this structure content to zero before first use !
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/*! LZ4_createStream() and LZ4_freeStream() :
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* LZ4_createStream() will allocate and initialize an `LZ4_stream_t` structure.
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* LZ4_freeStream() releases its memory.
|
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*/
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typedef struct { unsigned int table[LZ4_STREAMSIZE_U32]; } LZ4_stream_t;
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LZ4LIB_API LZ4_stream_t* LZ4_createStream(void);
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LZ4LIB_API int LZ4_freeStream (LZ4_stream_t* streamPtr);
|
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|
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/*
|
||||
* If you prefer dynamic allocation methods,
|
||||
* LZ4_createStream
|
||||
* provides a pointer (void*) towards an initialized LZ4_stream_t structure.
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* LZ4_free just frees it.
|
||||
/*! LZ4_resetStream() :
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* An LZ4_stream_t structure can be allocated once and re-used multiple times.
|
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* Use this function to init an allocated `LZ4_stream_t` structure and start a new compression.
|
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*/
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void* LZ4_createStream();
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int LZ4_free (void* LZ4_stream);
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LZ4LIB_API void LZ4_resetStream (LZ4_stream_t* streamPtr);
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/*
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* LZ4_loadDict
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* Use this function to load a static dictionary into LZ4_stream.
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* Any previous data will be forgotten, only 'dictionary' will remain in memory.
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* Loading a size of 0 is allowed (same effect as init).
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* Return : 1 if OK, 0 if error
|
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/*! LZ4_loadDict() :
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* Use this function to load a static dictionary into LZ4_stream.
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* Any previous data will be forgotten, only 'dictionary' will remain in memory.
|
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* Loading a size of 0 is allowed.
|
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* Return : dictionary size, in bytes (necessarily <= 64 KB)
|
||||
*/
|
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int LZ4_loadDict (void* LZ4_stream, const char* dictionary, int dictSize);
|
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LZ4LIB_API int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
|
||||
|
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/*
|
||||
* LZ4_compress_continue
|
||||
* Compress data block 'source', using blocks compressed before as dictionary to improve compression ratio
|
||||
* Previous data blocks are assumed to still be present at their previous location.
|
||||
/*! LZ4_compress_fast_continue() :
|
||||
* Compress buffer content 'src', using data from previously compressed blocks as dictionary to improve compression ratio.
|
||||
* Important : Previous data blocks are assumed to remain present and unmodified !
|
||||
* 'dst' buffer must be already allocated.
|
||||
* If dstCapacity >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
|
||||
* If not, and if compressed data cannot fit into 'dst' buffer size, compression stops, and function @return==0.
|
||||
* After an error, the stream status is invalid, it can only be reset or freed.
|
||||
*/
|
||||
int LZ4_compress_continue (void* LZ4_stream, const char* source, char* dest, int inputSize);
|
||||
LZ4LIB_API int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
|
||||
|
||||
/*
|
||||
* LZ4_compress_limitedOutput_continue
|
||||
* Same as before, but also specify a maximum target compressed size (maxOutputSize)
|
||||
* If objective cannot be met, compression exits, and returns a zero.
|
||||
/*! LZ4_saveDict() :
|
||||
* If previously compressed data block is not guaranteed to remain available at its current memory location,
|
||||
* save it into a safer place (char* safeBuffer).
|
||||
* Note : it's not necessary to call LZ4_loadDict() after LZ4_saveDict(), dictionary is immediately usable.
|
||||
* @return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error.
|
||||
*/
|
||||
int LZ4_compress_limitedOutput_continue (void* LZ4_stream, const char* source, char* dest, int inputSize, int maxOutputSize);
|
||||
|
||||
/*
|
||||
* LZ4_saveDict
|
||||
* If previously compressed data block is not guaranteed to remain at its previous memory location
|
||||
* save it into a safe place (char* safeBuffer)
|
||||
* Note : you don't need to call LZ4_loadDict() afterwards,
|
||||
* dictionary is immediately usable, you can therefore call again LZ4_compress_continue()
|
||||
* Return : 1 if OK, 0 if error
|
||||
* Note : any dictSize > 64 KB will be interpreted as 64KB.
|
||||
*/
|
||||
int LZ4_saveDict (void* LZ4_stream, char* safeBuffer, int dictSize);
|
||||
LZ4LIB_API int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int dictSize);
|
||||
|
||||
|
||||
/************************************************
|
||||
Experimental Streaming Decompression Functions
|
||||
/*-**********************************************
|
||||
* Streaming Decompression Functions
|
||||
* Bufferless synchronous API
|
||||
************************************************/
|
||||
typedef union LZ4_streamDecode_u LZ4_streamDecode_t; /* incomplete type (defined later) */
|
||||
|
||||
#define LZ4_STREAMDECODESIZE_U32 4
|
||||
#define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U32 * sizeof(unsigned int))
|
||||
/*
|
||||
* LZ4_streamDecode_t
|
||||
/*! LZ4_createStreamDecode() and LZ4_freeStreamDecode() :
|
||||
* creation / destruction of streaming decompression tracking structure */
|
||||
LZ4LIB_API LZ4_streamDecode_t* LZ4_createStreamDecode(void);
|
||||
LZ4LIB_API int LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
|
||||
|
||||
/*! LZ4_setStreamDecode() :
|
||||
* Use this function to instruct where to find the dictionary.
|
||||
* Setting a size of 0 is allowed (same effect as reset).
|
||||
* @return : 1 if OK, 0 if error
|
||||
*/
|
||||
LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
|
||||
|
||||
/*! LZ4_decompress_*_continue() :
|
||||
* These decoding functions allow decompression of multiple blocks in "streaming" mode.
|
||||
* Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB)
|
||||
* In the case of a ring buffers, decoding buffer must be either :
|
||||
* - Exactly same size as encoding buffer, with same update rule (block boundaries at same positions)
|
||||
* In which case, the decoding & encoding ring buffer can have any size, including very small ones ( < 64 KB).
|
||||
* - Larger than encoding buffer, by a minimum of maxBlockSize more bytes.
|
||||
* maxBlockSize is implementation dependent. It's the maximum size you intend to compress into a single block.
|
||||
* In which case, encoding and decoding buffers do not need to be synchronized,
|
||||
* and encoding ring buffer can have any size, including small ones ( < 64 KB).
|
||||
* - _At least_ 64 KB + 8 bytes + maxBlockSize.
|
||||
* In which case, encoding and decoding buffers do not need to be synchronized,
|
||||
* and encoding ring buffer can have any size, including larger than decoding buffer.
|
||||
* Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer,
|
||||
* and indicate where it is saved using LZ4_setStreamDecode()
|
||||
*/
|
||||
LZ4LIB_API int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxDecompressedSize);
|
||||
LZ4LIB_API int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int originalSize);
|
||||
|
||||
|
||||
/*! LZ4_decompress_*_usingDict() :
|
||||
* These decoding functions work the same as
|
||||
* a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue()
|
||||
* They are stand-alone, and don't need an LZ4_streamDecode_t structure.
|
||||
*/
|
||||
LZ4LIB_API int LZ4_decompress_safe_usingDict (const char* source, char* dest, int compressedSize, int maxDecompressedSize, const char* dictStart, int dictSize);
|
||||
LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* source, char* dest, int originalSize, const char* dictStart, int dictSize);
|
||||
|
||||
|
||||
/*^**********************************************
|
||||
* !!!!!! STATIC LINKING ONLY !!!!!!
|
||||
***********************************************/
|
||||
/*-************************************
|
||||
* Private definitions
|
||||
**************************************
|
||||
* Do not use these definitions.
|
||||
* They are exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
|
||||
* Using these definitions will expose code to API and/or ABI break in future versions of the library.
|
||||
**************************************/
|
||||
#define LZ4_HASHLOG (LZ4_MEMORY_USAGE-2)
|
||||
#define LZ4_HASHTABLESIZE (1 << LZ4_MEMORY_USAGE)
|
||||
#define LZ4_HASH_SIZE_U32 (1 << LZ4_HASHLOG) /* required as macro for static allocation */
|
||||
|
||||
#if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
|
||||
#include <stdint.h>
|
||||
|
||||
typedef struct {
|
||||
uint32_t hashTable[LZ4_HASH_SIZE_U32];
|
||||
uint32_t currentOffset;
|
||||
uint32_t initCheck;
|
||||
const uint8_t* dictionary;
|
||||
uint8_t* bufferStart; /* obsolete, used for slideInputBuffer */
|
||||
uint32_t dictSize;
|
||||
} LZ4_stream_t_internal;
|
||||
|
||||
typedef struct {
|
||||
const uint8_t* externalDict;
|
||||
size_t extDictSize;
|
||||
const uint8_t* prefixEnd;
|
||||
size_t prefixSize;
|
||||
} LZ4_streamDecode_t_internal;
|
||||
|
||||
#else
|
||||
|
||||
typedef struct {
|
||||
unsigned int hashTable[LZ4_HASH_SIZE_U32];
|
||||
unsigned int currentOffset;
|
||||
unsigned int initCheck;
|
||||
const unsigned char* dictionary;
|
||||
unsigned char* bufferStart; /* obsolete, used for slideInputBuffer */
|
||||
unsigned int dictSize;
|
||||
} LZ4_stream_t_internal;
|
||||
|
||||
typedef struct {
|
||||
const unsigned char* externalDict;
|
||||
size_t extDictSize;
|
||||
const unsigned char* prefixEnd;
|
||||
size_t prefixSize;
|
||||
} LZ4_streamDecode_t_internal;
|
||||
|
||||
#endif
|
||||
|
||||
/*!
|
||||
* LZ4_stream_t :
|
||||
* information structure to track an LZ4 stream.
|
||||
* important : set this structure content to zero before first use !
|
||||
* init this structure before first use.
|
||||
* note : only use in association with static linking !
|
||||
* this definition is not API/ABI safe,
|
||||
* it may change in a future version !
|
||||
*/
|
||||
typedef struct { unsigned int table[LZ4_STREAMDECODESIZE_U32]; } LZ4_streamDecode_t;
|
||||
#define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
|
||||
#define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(unsigned long long))
|
||||
union LZ4_stream_u {
|
||||
unsigned long long table[LZ4_STREAMSIZE_U64];
|
||||
LZ4_stream_t_internal internal_donotuse;
|
||||
} ; /* previously typedef'd to LZ4_stream_t */
|
||||
|
||||
/*
|
||||
* If you prefer dynamic allocation methods,
|
||||
* LZ4_createStreamDecode()
|
||||
* provides a pointer (void*) towards an initialized LZ4_streamDecode_t structure.
|
||||
* LZ4_free just frees it.
|
||||
|
||||
/*!
|
||||
* LZ4_streamDecode_t :
|
||||
* information structure to track an LZ4 stream during decompression.
|
||||
* init this structure using LZ4_setStreamDecode (or memset()) before first use
|
||||
* note : only use in association with static linking !
|
||||
* this definition is not API/ABI safe,
|
||||
* and may change in a future version !
|
||||
*/
|
||||
void* LZ4_createStreamDecode();
|
||||
int LZ4_free (void* LZ4_stream); /* yes, it's the same one as for compression */
|
||||
|
||||
/*
|
||||
*_continue() :
|
||||
These decoding functions allow decompression of multiple blocks in "streaming" mode.
|
||||
Previously decoded blocks must still be available at the memory position where they were decoded.
|
||||
If it's not possible, save the relevant part of decoded data into a safe buffer,
|
||||
and indicate where it stands using LZ4_setDictDecode()
|
||||
*/
|
||||
int LZ4_decompress_safe_continue (void* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxOutputSize);
|
||||
int LZ4_decompress_fast_continue (void* LZ4_streamDecode, const char* source, char* dest, int originalSize);
|
||||
|
||||
/*
|
||||
* LZ4_setDictDecode
|
||||
* Use this function to instruct where to find the dictionary.
|
||||
* This function can be used to specify a static dictionary,
|
||||
* or to instruct where to find some previously decoded data saved into a different memory space.
|
||||
* Setting a size of 0 is allowed (same effect as no dictionary).
|
||||
* Return : 1 if OK, 0 if error
|
||||
*/
|
||||
int LZ4_setDictDecode (void* LZ4_streamDecode, const char* dictionary, int dictSize);
|
||||
#define LZ4_STREAMDECODESIZE_U64 4
|
||||
#define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
|
||||
union LZ4_streamDecode_u {
|
||||
unsigned long long table[LZ4_STREAMDECODESIZE_U64];
|
||||
LZ4_streamDecode_t_internal internal_donotuse;
|
||||
} ; /* previously typedef'd to LZ4_streamDecode_t */
|
||||
|
||||
|
||||
/*
|
||||
Advanced decoding functions :
|
||||
*_usingDict() :
|
||||
These decoding functions work the same as
|
||||
a combination of LZ4_setDictDecode() followed by LZ4_decompress_x_continue()
|
||||
all together into a single function call.
|
||||
It doesn't use nor update an LZ4_streamDecode_t structure.
|
||||
*/
|
||||
int LZ4_decompress_safe_usingDict (const char* source, char* dest, int compressedSize, int maxOutputSize, const char* dictStart, int dictSize);
|
||||
int LZ4_decompress_fast_usingDict (const char* source, char* dest, int originalSize, const char* dictStart, int dictSize);
|
||||
/*-************************************
|
||||
* Obsolete Functions
|
||||
**************************************/
|
||||
|
||||
/*! Deprecation warnings
|
||||
Should deprecation warnings be a problem,
|
||||
it is generally possible to disable them,
|
||||
typically with -Wno-deprecated-declarations for gcc
|
||||
or _CRT_SECURE_NO_WARNINGS in Visual.
|
||||
Otherwise, it's also possible to define LZ4_DISABLE_DEPRECATE_WARNINGS */
|
||||
#ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
|
||||
# define LZ4_DEPRECATED(message) /* disable deprecation warnings */
|
||||
#else
|
||||
# define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
|
||||
# if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */
|
||||
# define LZ4_DEPRECATED(message) [[deprecated(message)]]
|
||||
# elif (LZ4_GCC_VERSION >= 405) || defined(__clang__)
|
||||
# define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
|
||||
# elif (LZ4_GCC_VERSION >= 301)
|
||||
# define LZ4_DEPRECATED(message) __attribute__((deprecated))
|
||||
# elif defined(_MSC_VER)
|
||||
# define LZ4_DEPRECATED(message) __declspec(deprecated(message))
|
||||
# else
|
||||
# pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
|
||||
# define LZ4_DEPRECATED(message)
|
||||
# endif
|
||||
#endif /* LZ4_DISABLE_DEPRECATE_WARNINGS */
|
||||
|
||||
/* Obsolete compression functions */
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress (const char* source, char* dest, int sourceSize);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress_limitedOutput (const char* source, char* dest, int sourceSize, int maxOutputSize);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_withState (void* state, const char* source, char* dest, int inputSize);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") int LZ4_compress_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
|
||||
|
||||
/* Obsolete decompression functions */
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_fast() instead") int LZ4_uncompress (const char* source, char* dest, int outputSize);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_safe() instead") int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize);
|
||||
|
||||
/* Obsolete streaming functions; use new streaming interface whenever possible */
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_createStream() instead") void* LZ4_create (char* inputBuffer);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_createStream() instead") int LZ4_sizeofStreamState(void);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_resetStream() instead") int LZ4_resetStreamState(void* state, char* inputBuffer);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_saveDict() instead") char* LZ4_slideInputBuffer (void* state);
|
||||
|
||||
/* Obsolete streaming decoding functions */
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_safe_usingDict() instead") int LZ4_decompress_safe_withPrefix64k (const char* src, char* dst, int compressedSize, int maxDstSize);
|
||||
LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
|
||||
|
||||
#endif /* LZ4_H_2983827168210 */
|
||||
|
||||
|
||||
#if defined (__cplusplus)
|
||||
|
|
|
|||
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