mirror of
https://github.com/Xevion/easy7zip.git
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Update lz4 to version 1.9.1
This commit is contained in:
Tino Reichardt
246
C/lz4/lz4hc.h
246
C/lz4/lz4hc.h
@@ -54,7 +54,7 @@ extern "C" {
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* Block Compression
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**************************************/
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/*! LZ4_compress_HC() :
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* Compress data from `src` into `dst`, using the more powerful but slower "HC" algorithm.
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* Compress data from `src` into `dst`, using the powerful but slower "HC" algorithm.
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* `dst` must be already allocated.
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* Compression is guaranteed to succeed if `dstCapacity >= LZ4_compressBound(srcSize)` (see "lz4.h")
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* Max supported `srcSize` value is LZ4_MAX_INPUT_SIZE (see "lz4.h")
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@@ -77,7 +77,21 @@ LZ4LIB_API int LZ4_compress_HC (const char* src, char* dst, int srcSize, int dst
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* Memory segment must be aligned on 8-bytes boundaries (which a normal malloc() should do properly).
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*/
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LZ4LIB_API int LZ4_sizeofStateHC(void);
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LZ4LIB_API int LZ4_compress_HC_extStateHC(void* state, const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel);
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LZ4LIB_API int LZ4_compress_HC_extStateHC(void* stateHC, const char* src, char* dst, int srcSize, int maxDstSize, int compressionLevel);
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/*! LZ4_compress_HC_destSize() : v1.9.0+
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* Will compress as much data as possible from `src`
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* to fit into `targetDstSize` budget.
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* Result is provided in 2 parts :
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* @return : the number of bytes written into 'dst' (necessarily <= targetDstSize)
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* or 0 if compression fails.
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* `srcSizePtr` : on success, *srcSizePtr is updated to indicate how much bytes were read from `src`
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*/
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LZ4LIB_API int LZ4_compress_HC_destSize(void* stateHC,
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const char* src, char* dst,
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int* srcSizePtr, int targetDstSize,
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int compressionLevel);
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/*-************************************
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@@ -89,46 +103,92 @@ LZ4LIB_API int LZ4_compress_HC_extStateHC(void* state, const char* src, char* ds
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/*! LZ4_createStreamHC() and LZ4_freeStreamHC() :
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* These functions create and release memory for LZ4 HC streaming state.
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* Newly created states are automatically initialized.
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* Existing states can be re-used several times, using LZ4_resetStreamHC().
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* These methods are API and ABI stable, they can be used in combination with a DLL.
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* A same state can be used multiple times consecutively,
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* starting with LZ4_resetStreamHC_fast() to start a new stream of blocks.
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*/
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LZ4LIB_API LZ4_streamHC_t* LZ4_createStreamHC(void);
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LZ4LIB_API int LZ4_freeStreamHC (LZ4_streamHC_t* streamHCPtr);
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LZ4LIB_API void LZ4_resetStreamHC (LZ4_streamHC_t* streamHCPtr, int compressionLevel);
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/*
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These functions compress data in successive blocks of any size,
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using previous blocks as dictionary, to improve compression ratio.
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One key assumption is that previous blocks (up to 64 KB) remain read-accessible while compressing next blocks.
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There is an exception for ring buffers, which can be smaller than 64 KB.
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Ring-buffer scenario is automatically detected and handled within LZ4_compress_HC_continue().
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Before starting compression, state must be allocated and properly initialized.
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LZ4_createStreamHC() does both, though compression level is set to LZ4HC_CLEVEL_DEFAULT.
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Selecting the compression level can be done with LZ4_resetStreamHC_fast() (starts a new stream)
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or LZ4_setCompressionLevel() (anytime, between blocks in the same stream) (experimental).
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LZ4_resetStreamHC_fast() only works on states which have been properly initialized at least once,
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which is automatically the case when state is created using LZ4_createStreamHC().
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After reset, a first "fictional block" can be designated as initial dictionary,
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using LZ4_loadDictHC() (Optional).
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Invoke LZ4_compress_HC_continue() to compress each successive block.
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The number of blocks is unlimited.
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Previous input blocks, including initial dictionary when present,
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must remain accessible and unmodified during compression.
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It's allowed to update compression level anytime between blocks,
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using LZ4_setCompressionLevel() (experimental).
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'dst' buffer should be sized to handle worst case scenarios
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(see LZ4_compressBound(), it ensures compression success).
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In case of failure, the API does not guarantee recovery,
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so the state _must_ be reset.
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To ensure compression success
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whenever `dst` buffer size cannot be made >= LZ4_compressBound(),
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consider using LZ4_compress_HC_continue_destSize().
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Whenever previous input blocks can't be preserved unmodified in-place during compression of next blocks,
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it's possible to copy the last blocks into a more stable memory space, using LZ4_saveDictHC().
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Return value of LZ4_saveDictHC() is the size of dictionary effectively saved into 'safeBuffer' (<= 64 KB)
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After completing a streaming compression,
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it's possible to start a new stream of blocks, using the same LZ4_streamHC_t state,
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just by resetting it, using LZ4_resetStreamHC_fast().
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*/
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LZ4LIB_API void LZ4_resetStreamHC_fast(LZ4_streamHC_t* streamHCPtr, int compressionLevel); /* v1.9.0+ */
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LZ4LIB_API int LZ4_loadDictHC (LZ4_streamHC_t* streamHCPtr, const char* dictionary, int dictSize);
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LZ4LIB_API int LZ4_compress_HC_continue (LZ4_streamHC_t* streamHCPtr, const char* src, char* dst, int srcSize, int maxDstSize);
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LZ4LIB_API int LZ4_compress_HC_continue (LZ4_streamHC_t* streamHCPtr,
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const char* src, char* dst,
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int srcSize, int maxDstSize);
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/*! LZ4_compress_HC_continue_destSize() : v1.9.0+
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* Similar to LZ4_compress_HC_continue(),
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* but will read as much data as possible from `src`
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* to fit into `targetDstSize` budget.
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* Result is provided into 2 parts :
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* @return : the number of bytes written into 'dst' (necessarily <= targetDstSize)
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* or 0 if compression fails.
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* `srcSizePtr` : on success, *srcSizePtr will be updated to indicate how much bytes were read from `src`.
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* Note that this function may not consume the entire input.
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*/
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LZ4LIB_API int LZ4_compress_HC_continue_destSize(LZ4_streamHC_t* LZ4_streamHCPtr,
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const char* src, char* dst,
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int* srcSizePtr, int targetDstSize);
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LZ4LIB_API int LZ4_saveDictHC (LZ4_streamHC_t* streamHCPtr, char* safeBuffer, int maxDictSize);
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/*
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These functions compress data in successive blocks of any size, using previous blocks as dictionary.
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One key assumption is that previous blocks (up to 64 KB) remain read-accessible while compressing next blocks.
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There is an exception for ring buffers, which can be smaller than 64 KB.
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Ring buffers scenario is automatically detected and handled by LZ4_compress_HC_continue().
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Before starting compression, state must be properly initialized, using LZ4_resetStreamHC().
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A first "fictional block" can then be designated as initial dictionary, using LZ4_loadDictHC() (Optional).
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Then, use LZ4_compress_HC_continue() to compress each successive block.
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Previous memory blocks (including initial dictionary when present) must remain accessible and unmodified during compression.
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'dst' buffer should be sized to handle worst case scenarios (see LZ4_compressBound()), to ensure operation success.
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Because in case of failure, the API does not guarantee context recovery, and context will have to be reset.
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If `dst` buffer budget cannot be >= LZ4_compressBound(), consider using LZ4_compress_HC_continue_destSize() instead.
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If, for any reason, previous data block can't be preserved unmodified in memory for next compression block,
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you can save it to a more stable memory space, using LZ4_saveDictHC().
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Return value of LZ4_saveDictHC() is the size of dictionary effectively saved into 'safeBuffer'.
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*/
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/*-**************************************************************
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/*^**********************************************
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* !!!!!! STATIC LINKING ONLY !!!!!!
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***********************************************/
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/*-******************************************************************
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* PRIVATE DEFINITIONS :
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* Do not use these definitions.
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* They are exposed to allow static allocation of `LZ4_streamHC_t`.
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* Using these definitions makes the code vulnerable to potential API break when upgrading LZ4
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****************************************************************/
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* Do not use these definitions directly.
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* They are merely exposed to allow static allocation of `LZ4_streamHC_t`.
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* Declare an `LZ4_streamHC_t` directly, rather than any type below.
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* Even then, only do so in the context of static linking, as definitions may change between versions.
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********************************************************************/
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#define LZ4HC_DICTIONARY_LOGSIZE 16
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#define LZ4HC_MAXD (1<<LZ4HC_DICTIONARY_LOGSIZE)
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#define LZ4HC_MAXD_MASK (LZ4HC_MAXD - 1)
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@@ -153,7 +213,9 @@ struct LZ4HC_CCtx_internal
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uint32_t lowLimit; /* below that point, no more dict */
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uint32_t nextToUpdate; /* index from which to continue dictionary update */
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short compressionLevel;
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short favorDecSpeed;
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int8_t favorDecSpeed; /* favor decompression speed if this flag set,
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otherwise, favor compression ratio */
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int8_t dirty; /* stream has to be fully reset if this flag is set */
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const LZ4HC_CCtx_internal* dictCtx;
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};
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@@ -171,26 +233,43 @@ struct LZ4HC_CCtx_internal
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unsigned int lowLimit; /* below that point, no more dict */
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unsigned int nextToUpdate; /* index from which to continue dictionary update */
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short compressionLevel;
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short favorDecSpeed;
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char favorDecSpeed; /* favor decompression speed if this flag set,
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otherwise, favor compression ratio */
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char dirty; /* stream has to be fully reset if this flag is set */
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const LZ4HC_CCtx_internal* dictCtx;
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};
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#endif
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#define LZ4_STREAMHCSIZE (4*LZ4HC_HASHTABLESIZE + 2*LZ4HC_MAXD + 56) /* 262200 */
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/* Do not use these definitions directly !
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* Declare or allocate an LZ4_streamHC_t instead.
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*/
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#define LZ4_STREAMHCSIZE (4*LZ4HC_HASHTABLESIZE + 2*LZ4HC_MAXD + 56 + ((sizeof(void*)==16) ? 56 : 0) /* AS400*/ ) /* 262200 or 262256*/
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#define LZ4_STREAMHCSIZE_SIZET (LZ4_STREAMHCSIZE / sizeof(size_t))
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union LZ4_streamHC_u {
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size_t table[LZ4_STREAMHCSIZE_SIZET];
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LZ4HC_CCtx_internal internal_donotuse;
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}; /* previously typedef'd to LZ4_streamHC_t */
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/*
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LZ4_streamHC_t :
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This structure allows static allocation of LZ4 HC streaming state.
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State must be initialized using LZ4_resetStreamHC() before first use.
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}; /* previously typedef'd to LZ4_streamHC_t */
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Static allocation shall only be used in combination with static linking.
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When invoking LZ4 from a DLL, use create/free functions instead, which are API and ABI stable.
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*/
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/* LZ4_streamHC_t :
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* This structure allows static allocation of LZ4 HC streaming state.
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* This can be used to allocate statically, on state, or as part of a larger structure.
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*
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* Such state **must** be initialized using LZ4_initStreamHC() before first use.
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*
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* Note that invoking LZ4_initStreamHC() is not required when
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* the state was created using LZ4_createStreamHC() (which is recommended).
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* Using the normal builder, a newly created state is automatically initialized.
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*
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* Static allocation shall only be used in combination with static linking.
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*/
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/* LZ4_initStreamHC() : v1.9.0+
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* Required before first use of a statically allocated LZ4_streamHC_t.
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* Before v1.9.0 : use LZ4_resetStreamHC() instead
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*/
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LZ4LIB_API LZ4_streamHC_t* LZ4_initStreamHC (void* buffer, size_t size);
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/*-************************************
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@@ -201,11 +280,11 @@ union LZ4_streamHC_u {
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/* deprecated compression functions */
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LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC (const char* source, char* dest, int inputSize);
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LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize);
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LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC2 (const char* source, char* dest, int inputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC2_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC2 (const char* source, char* dest, int inputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC() instead") LZ4LIB_API int LZ4_compressHC2_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC_withStateHC (void* state, const char* source, char* dest, int inputSize);
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LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
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LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC2_withStateHC (void* state, const char* source, char* dest, int inputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC2_withStateHC (void* state, const char* source, char* dest, int inputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC_extStateHC() instead") LZ4LIB_API int LZ4_compressHC2_limitedOutput_withStateHC(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize);
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LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC_limitedOutput_continue (LZ4_streamHC_t* LZ4_streamHCPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
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@@ -221,10 +300,21 @@ LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_comp
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LZ4_DEPRECATED("use LZ4_createStreamHC() instead") LZ4LIB_API void* LZ4_createHC (const char* inputBuffer);
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LZ4_DEPRECATED("use LZ4_saveDictHC() instead") LZ4LIB_API char* LZ4_slideInputBufferHC (void* LZ4HC_Data);
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LZ4_DEPRECATED("use LZ4_freeStreamHC() instead") LZ4LIB_API int LZ4_freeHC (void* LZ4HC_Data);
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LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_compress_HC_continue() instead") LZ4LIB_API int LZ4_compressHC2_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
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LZ4_DEPRECATED("use LZ4_createStreamHC() instead") LZ4LIB_API int LZ4_sizeofStreamStateHC(void);
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LZ4_DEPRECATED("use LZ4_resetStreamHC() instead") LZ4LIB_API int LZ4_resetStreamStateHC(void* state, char* inputBuffer);
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LZ4_DEPRECATED("use LZ4_initStreamHC() instead") LZ4LIB_API int LZ4_resetStreamStateHC(void* state, char* inputBuffer);
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/* LZ4_resetStreamHC() is now replaced by LZ4_initStreamHC().
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* The intention is to emphasize the difference with LZ4_resetStreamHC_fast(),
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* which is now the recommended function to start a new stream of blocks,
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* but cannot be used to initialize a memory segment containing arbitrary garbage data.
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*
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* It is recommended to switch to LZ4_initStreamHC().
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* LZ4_resetStreamHC() will generate deprecation warnings in a future version.
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*/
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LZ4LIB_API void LZ4_resetStreamHC (LZ4_streamHC_t* streamHCPtr, int compressionLevel);
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#if defined (__cplusplus)
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@@ -250,44 +340,22 @@ LZ4_DEPRECATED("use LZ4_resetStreamHC() instead") LZ4LIB_API int LZ4_resetStr
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extern "C" {
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#endif
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/*! LZ4_compress_HC_destSize() : v1.8.0 (experimental)
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* Will try to compress as much data from `src` as possible
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* that can fit into `targetDstSize` budget.
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* Result is provided in 2 parts :
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* @return : the number of bytes written into 'dst'
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* or 0 if compression fails.
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* `srcSizePtr` : value will be updated to indicate how much bytes were read from `src`
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/*! LZ4_setCompressionLevel() : v1.8.0+ (experimental)
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* It's possible to change compression level
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* between successive invocations of LZ4_compress_HC_continue*()
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* for dynamic adaptation.
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*/
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int LZ4_compress_HC_destSize(void* LZ4HC_Data,
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const char* src, char* dst,
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int* srcSizePtr, int targetDstSize,
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int compressionLevel);
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LZ4LIB_STATIC_API void LZ4_setCompressionLevel(
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LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
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/*! LZ4_compress_HC_continue_destSize() : v1.8.0 (experimental)
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* Similar as LZ4_compress_HC_continue(),
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* but will read a variable nb of bytes from `src`
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* to fit into `targetDstSize` budget.
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* Result is provided in 2 parts :
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* @return : the number of bytes written into 'dst'
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* or 0 if compression fails.
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* `srcSizePtr` : value will be updated to indicate how much bytes were read from `src`.
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/*! LZ4_favorDecompressionSpeed() : v1.8.2+ (experimental)
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* Opt. Parser will favor decompression speed over compression ratio.
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* Only applicable to levels >= LZ4HC_CLEVEL_OPT_MIN.
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*/
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int LZ4_compress_HC_continue_destSize(LZ4_streamHC_t* LZ4_streamHCPtr,
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const char* src, char* dst,
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int* srcSizePtr, int targetDstSize);
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LZ4LIB_STATIC_API void LZ4_favorDecompressionSpeed(
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LZ4_streamHC_t* LZ4_streamHCPtr, int favor);
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/*! LZ4_setCompressionLevel() : v1.8.0 (experimental)
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* It's possible to change compression level between 2 invocations of LZ4_compress_HC_continue*()
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*/
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void LZ4_setCompressionLevel(LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
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/*! LZ4_favorDecompressionSpeed() : v1.8.2 (experimental)
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* Parser will select decisions favoring decompression over compression ratio.
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* Only work at highest compression settings (level >= LZ4HC_CLEVEL_OPT_MIN)
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*/
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void LZ4_favorDecompressionSpeed(LZ4_streamHC_t* LZ4_streamHCPtr, int favor);
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/*! LZ4_resetStreamHC_fast() :
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/*! LZ4_resetStreamHC_fast() : v1.9.0+
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* When an LZ4_streamHC_t is known to be in a internally coherent state,
|
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* it can often be prepared for a new compression with almost no work, only
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* sometimes falling back to the full, expensive reset that is always required
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@@ -304,8 +372,14 @@ void LZ4_favorDecompressionSpeed(LZ4_streamHC_t* LZ4_streamHCPtr, int favor);
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* - the stream was in an indeterminate state and was used in a compression
|
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* call that fully reset the state (LZ4_compress_HC_extStateHC()) and that
|
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* returned success
|
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*
|
||||
* Note:
|
||||
* A stream that was last used in a compression call that returned an error
|
||||
* may be passed to this function. However, it will be fully reset, which will
|
||||
* clear any existing history and settings from the context.
|
||||
*/
|
||||
void LZ4_resetStreamHC_fast(LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
|
||||
LZ4LIB_STATIC_API void LZ4_resetStreamHC_fast(
|
||||
LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLevel);
|
||||
|
||||
/*! LZ4_compress_HC_extStateHC_fastReset() :
|
||||
* A variant of LZ4_compress_HC_extStateHC().
|
||||
@@ -318,7 +392,11 @@ void LZ4_resetStreamHC_fast(LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLeve
|
||||
* LZ4_resetStreamHC_fast() while LZ4_compress_HC_extStateHC() starts with a
|
||||
* call to LZ4_resetStreamHC().
|
||||
*/
|
||||
int LZ4_compress_HC_extStateHC_fastReset (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int compressionLevel);
|
||||
LZ4LIB_STATIC_API int LZ4_compress_HC_extStateHC_fastReset (
|
||||
void* state,
|
||||
const char* src, char* dst,
|
||||
int srcSize, int dstCapacity,
|
||||
int compressionLevel);
|
||||
|
||||
/*! LZ4_attach_HC_dictionary() :
|
||||
* This is an experimental API that allows for the efficient use of a
|
||||
@@ -345,7 +423,9 @@ int LZ4_compress_HC_extStateHC_fastReset (void* state, const char* src, char* ds
|
||||
* stream (and source buffer) must remain in-place / accessible / unchanged
|
||||
* through the lifetime of the stream session.
|
||||
*/
|
||||
LZ4LIB_API void LZ4_attach_HC_dictionary(LZ4_streamHC_t *working_stream, const LZ4_streamHC_t *dictionary_stream);
|
||||
LZ4LIB_STATIC_API void LZ4_attach_HC_dictionary(
|
||||
LZ4_streamHC_t *working_stream,
|
||||
const LZ4_streamHC_t *dictionary_stream);
|
||||
|
||||
#if defined (__cplusplus)
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user