ddidderr/zstd-rs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

added : ZSTD_compress_usingPreparedCCtx()

Browse Source
This commit is contained in:
Yann Collet
2016-01-30 03:14:15 +01:00
parent 82516192e7
commit fd416f1eaf
4 changed files with 168 additions and 155 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/zstd_static.h
+20 -106
View File
@@ -82,16 +82,16 @@ typedef struct
/* *************************************
* Advanced functions
***************************************/
/** ZSTD_getParams
* return ZSTD_parameters structure for a selected compression level and srcSize.
* srcSizeHint value is optional, select 0 if not known */
/*! ZSTD_getParams
* @return ZSTD_parameters structure for a selected compression level and srcSize.
* @srcSizeHint value is optional, select 0 if not known */
ZSTDLIB_API ZSTD_parameters ZSTD_getParams(int compressionLevel, U64 srcSizeHint);
/** ZSTD_validateParams
/*! ZSTD_validateParams
* correct params value to remain within authorized range */
ZSTDLIB_API void ZSTD_validateParams(ZSTD_parameters* params);
/** ZSTD_compress_usingDict
/*! ZSTD_compress_usingDict
* Same as ZSTD_compressCCtx(), loading a Dictionary content.
* Note : dict can be NULL, in which case, it's equivalent to ZSTD_compressCCtx() */
ZSTDLIB_API size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx,
@@ -100,7 +100,7 @@ ZSTDLIB_API size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx,
const void* dict,size_t dictSize,
int compressionLevel);
/** ZSTD_compress_advanced
/*! ZSTD_compress_advanced
* Same as ZSTD_compress_usingDict(), with fine-tune control of each compression parameter */
ZSTDLIB_API size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
void* dst, size_t maxDstSize,
@@ -108,6 +108,18 @@ ZSTDLIB_API size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
const void* dict,size_t dictSize,
ZSTD_parameters params);
/*! ZSTD_compress_usingPreparedDCtx
* Same as ZSTD_compress_usingDict, but using a reference context preparedCCtx, where dictionary has been loaded.
* It avoids reloading the dictionary each time.
* preparedCCtx must have been properly initialized using ZSTD_compressBegin_usingDict() or ZSTD_compressBegin_advanced()
* Requires 2 contexts : 1 for reference, which will not be modified, and 1 to run the compression operation */
ZSTDLIB_API size_t ZSTD_compress_usingPreparedCCtx(
ZSTD_CCtx* cctx, const ZSTD_CCtx* preparedCCtx,
void* dst, size_t maxDstSize,
const void* src, size_t srcSize);
/*- Advanced Decompression functions -*/
/*! ZSTD_decompress_usingDict
* Same as ZSTD_decompressDCtx, using a Dictionary content as prefix
* Note : dict can be NULL, in which case, it's equivalent to ZSTD_decompressDCtx() */
@@ -117,9 +129,9 @@ ZSTDLIB_API size_t ZSTD_decompress_usingDict(ZSTD_DCtx* dctx,
const void* dict,size_t dictSize);
/*! ZSTD_decompress_usingPreparedDCtx
* Same as ZSTD_decompress_usingDict, but using a reference context preparedDCtx, where dictionary has already been loaded into.
* Same as ZSTD_decompress_usingDict, but using a reference context preparedDCtx, where dictionary has been loaded.
* It avoids reloading the dictionary each time.
* preparedDCtx must have been properly initialized using ZSTD_compressBegin_usingDict().
* preparedDCtx must have been properly initialized using ZSTD_decompressBegin_usingDict().
* Requires 2 contexts : 1 for reference, which will not be modified, and 1 to run the decompression operation */
ZSTDLIB_API size_t ZSTD_decompress_usingPreparedDCtx(
ZSTD_DCtx* dctx, const ZSTD_DCtx* preparedDCtx,
@@ -233,104 +245,6 @@ size_t ZSTD_decompressBlock(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const
***************************************/
#define ZSTD_MAX_CLEVEL 20
ZSTDLIB_API unsigned ZSTD_maxCLevel (void);
static const ZSTD_parameters ZSTD_defaultParameters[4][ZSTD_MAX_CLEVEL+1] = {
{ /* "default" */
/* W, C, H, S, L, strat */
{ 0, 18, 12, 12, 1, 4, ZSTD_fast }, /* level 0 - never used */
{ 0, 19, 13, 14, 1, 7, ZSTD_fast }, /* level 1 */
{ 0, 19, 15, 16, 1, 6, ZSTD_fast }, /* level 2 */
{ 0, 20, 18, 20, 1, 6, ZSTD_fast }, /* level 3 */
{ 0, 21, 19, 21, 1, 6, ZSTD_fast }, /* level 4 */
{ 0, 20, 14, 18, 3, 5, ZSTD_greedy }, /* level 5 */
{ 0, 20, 18, 19, 3, 5, ZSTD_greedy }, /* level 6 */
{ 0, 21, 17, 20, 3, 5, ZSTD_lazy }, /* level 7 */
{ 0, 21, 19, 20, 3, 5, ZSTD_lazy }, /* level 8 */
{ 0, 21, 20, 20, 3, 5, ZSTD_lazy2 }, /* level 9 */
{ 0, 21, 19, 21, 4, 5, ZSTD_lazy2 }, /* level 10 */
{ 0, 22, 20, 22, 4, 5, ZSTD_lazy2 }, /* level 11 */
{ 0, 22, 20, 22, 5, 5, ZSTD_lazy2 }, /* level 12 */
{ 0, 22, 21, 22, 5, 5, ZSTD_lazy2 }, /* level 13 */
{ 0, 22, 22, 23, 5, 5, ZSTD_lazy2 }, /* level 14 */
{ 0, 23, 23, 23, 5, 5, ZSTD_lazy2 }, /* level 15 */
{ 0, 23, 21, 22, 5, 5, ZSTD_btlazy2 }, /* level 16 */
{ 0, 23, 24, 23, 4, 5, ZSTD_btlazy2 }, /* level 17 */
{ 0, 25, 24, 23, 5, 5, ZSTD_btlazy2 }, /* level 18 */
{ 0, 25, 26, 23, 5, 5, ZSTD_btlazy2 }, /* level 19 */
{ 0, 26, 27, 25, 9, 5, ZSTD_btlazy2 }, /* level 20 */
},
{ /* for srcSize <= 256 KB */
/* W, C, H, S, L, strat */
{ 0, 18, 13, 14, 1, 7, ZSTD_fast }, /* level 0 - never used */
{ 0, 18, 14, 15, 1, 6, ZSTD_fast }, /* level 1 */
{ 0, 18, 14, 15, 1, 5, ZSTD_fast }, /* level 2 */
{ 0, 18, 12, 15, 3, 4, ZSTD_greedy }, /* level 3 */
{ 0, 18, 13, 15, 4, 4, ZSTD_greedy }, /* level 4 */
{ 0, 18, 14, 15, 5, 4, ZSTD_greedy }, /* level 5 */
{ 0, 18, 13, 15, 4, 4, ZSTD_lazy }, /* level 6 */
{ 0, 18, 14, 16, 5, 4, ZSTD_lazy }, /* level 7 */
{ 0, 18, 15, 16, 6, 4, ZSTD_lazy }, /* level 8 */
{ 0, 18, 15, 15, 7, 4, ZSTD_lazy }, /* level 9 */
{ 0, 18, 16, 16, 7, 4, ZSTD_lazy }, /* level 10 */
{ 0, 18, 16, 16, 8, 4, ZSTD_lazy }, /* level 11 */
{ 0, 18, 17, 16, 8, 4, ZSTD_lazy }, /* level 12 */
{ 0, 18, 17, 16, 9, 4, ZSTD_lazy }, /* level 13 */
{ 0, 18, 18, 16, 9, 4, ZSTD_lazy }, /* level 14 */
{ 0, 18, 17, 17, 9, 4, ZSTD_lazy2 }, /* level 15 */
{ 0, 18, 18, 18, 9, 4, ZSTD_lazy2 }, /* level 16 */
{ 0, 18, 18, 18, 10, 4, ZSTD_lazy2 }, /* level 17 */
{ 0, 18, 18, 18, 11, 4, ZSTD_lazy2 }, /* level 18 */
{ 0, 18, 18, 18, 12, 4, ZSTD_lazy2 }, /* level 19 */
{ 0, 18, 18, 18, 13, 4, ZSTD_lazy2 }, /* level 20 */
},
{ /* for srcSize <= 128 KB */
/* W, C, H, S, L, strat */
{ 0, 17, 12, 12, 1, 4, ZSTD_fast }, /* level 0 - never used */
{ 0, 17, 12, 13, 1, 6, ZSTD_fast }, /* level 1 */
{ 0, 17, 14, 16, 1, 5, ZSTD_fast }, /* level 2 */
{ 0, 17, 15, 17, 1, 5, ZSTD_fast }, /* level 3 */
{ 0, 17, 13, 15, 2, 4, ZSTD_greedy }, /* level 4 */
{ 0, 17, 15, 17, 3, 4, ZSTD_greedy }, /* level 5 */
{ 0, 17, 14, 17, 3, 4, ZSTD_lazy }, /* level 6 */
{ 0, 17, 16, 17, 4, 4, ZSTD_lazy }, /* level 7 */
{ 0, 17, 16, 17, 4, 4, ZSTD_lazy2 }, /* level 8 */
{ 0, 17, 17, 16, 5, 4, ZSTD_lazy2 }, /* level 9 */
{ 0, 17, 17, 16, 6, 4, ZSTD_lazy2 }, /* level 10 */
{ 0, 17, 17, 16, 7, 4, ZSTD_lazy2 }, /* level 11 */
{ 0, 17, 17, 16, 8, 4, ZSTD_lazy2 }, /* level 12 */
{ 0, 17, 18, 16, 4, 4, ZSTD_btlazy2 }, /* level 13 */
{ 0, 17, 18, 16, 5, 4, ZSTD_btlazy2 }, /* level 14 */
{ 0, 17, 18, 16, 6, 4, ZSTD_btlazy2 }, /* level 15 */
{ 0, 17, 18, 16, 7, 4, ZSTD_btlazy2 }, /* level 16 */
{ 0, 17, 18, 16, 8, 4, ZSTD_btlazy2 }, /* level 17 */
{ 0, 17, 18, 16, 9, 4, ZSTD_btlazy2 }, /* level 18 */
{ 0, 17, 18, 16, 10, 4, ZSTD_btlazy2 }, /* level 19 */
{ 0, 17, 18, 18, 12, 4, ZSTD_btlazy2 }, /* level 20 */
},
{ /* for srcSize <= 16 KB */
/* W, C, H, S, L, strat */
{ 0, 0, 0, 0, 0, 0, ZSTD_fast }, /* level 0 - never used */
{ 0, 14, 14, 14, 1, 4, ZSTD_fast }, /* level 1 */
{ 0, 14, 14, 16, 1, 4, ZSTD_fast }, /* level 2 */
{ 0, 14, 14, 14, 5, 4, ZSTD_greedy }, /* level 3 */
{ 0, 14, 14, 14, 8, 4, ZSTD_greedy }, /* level 4 */
{ 0, 14, 11, 14, 6, 4, ZSTD_lazy }, /* level 5 */
{ 0, 14, 14, 13, 6, 5, ZSTD_lazy }, /* level 6 */
{ 0, 14, 14, 14, 7, 6, ZSTD_lazy }, /* level 7 */
{ 0, 14, 14, 14, 8, 4, ZSTD_lazy }, /* level 8 */
{ 0, 14, 14, 15, 9, 4, ZSTD_lazy }, /* level 9 */
{ 0, 14, 14, 15, 10, 4, ZSTD_lazy }, /* level 10 */
{ 0, 14, 15, 15, 6, 4, ZSTD_btlazy2 }, /* level 11 */
{ 0, 14, 15, 15, 7, 4, ZSTD_btlazy2 }, /* level 12 */
{ 0, 14, 15, 15, 8, 4, ZSTD_btlazy2 }, /* level 13 */
{ 0, 14, 15, 15, 9, 4, ZSTD_btlazy2 }, /* level 14 */
{ 0, 14, 15, 15, 10, 4, ZSTD_btlazy2 }, /* level 15 */
{ 0, 14, 15, 15, 11, 4, ZSTD_btlazy2 }, /* level 16 */
{ 0, 14, 15, 15, 12, 4, ZSTD_btlazy2 }, /* level 17 */
{ 0, 14, 15, 15, 13, 4, ZSTD_btlazy2 }, /* level 18 */
{ 0, 14, 15, 15, 14, 4, ZSTD_btlazy2 }, /* level 19 */
{ 0, 14, 15, 15, 15, 4, ZSTD_btlazy2 }, /* level 20 */
},
};
/* *************************************