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

introduced strategy btultra2

Browse Source 
note : not yet applied on any compression level
This commit is contained in:
Yann Collet
2018-12-06 13:38:09 -08:00
parent 0c404a48f0
commit e9448cdf4c
3 changed files with 109 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/compress/zstd_compress.c
+59 -42
View File
@@ -269,7 +269,7 @@ ZSTD_bounds ZSTD_cParam_getBounds(ZSTD_cParameter param)
case ZSTD_c_compressionStrategy:
bounds.lowerBound = (int)ZSTD_fast;
bounds.upperBound = (int)ZSTD_btultra; /* note : how to ensure at compile time that this is the highest value strategy ? */
bounds.upperBound = (int)ZSTD_btultra2; /* note : how to ensure at compile time that this is the highest value strategy ? */
return bounds;
case ZSTD_c_contentSizeFlag:
@@ -364,9 +364,21 @@ ZSTD_bounds ZSTD_cParam_getBounds(ZSTD_cParameter param)
}
}
#define CLAMPCHECK(val,min,max) { \
if (((val)<(min)) | ((val)>(max))) { \
return ERROR(parameter_outOfBound); \
/* ZSTD_cParam_withinBounds:
* @return 1 if value is within cParam bounds,
* 0 otherwise */
static int ZSTD_cParam_withinBounds(ZSTD_cParameter cParam, int value)
{
ZSTD_bounds const bounds = ZSTD_cParam_getBounds(cParam);
if (ZSTD_isError(bounds.error)) return 0;
if (value < bounds.lowerBound) return 0;
if (value > bounds.upperBound) return 0;
return 1;
}
#define CLAMPCHECK(cParam, val) { \
if (!ZSTD_cParam_withinBounds(cParam,val)) { \
return ERROR(parameter_outOfBound); \
} }
@@ -493,31 +505,31 @@ size_t ZSTD_CCtxParam_setParameter(ZSTD_CCtx_params* CCtxParams,
case ZSTD_c_windowLog :
if (value!=0) /* 0 => use default */
CLAMPCHECK(value, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX);
CLAMPCHECK(ZSTD_c_windowLog, value);
CCtxParams->cParams.windowLog = value;
return CCtxParams->cParams.windowLog;
case ZSTD_c_hashLog :
if (value!=0) /* 0 => use default */
CLAMPCHECK(value, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX);
CLAMPCHECK(ZSTD_c_hashLog, value);
CCtxParams->cParams.hashLog = value;
return CCtxParams->cParams.hashLog;
case ZSTD_c_chainLog :
if (value!=0) /* 0 => use default */
CLAMPCHECK(value, ZSTD_CHAINLOG_MIN, ZSTD_CHAINLOG_MAX);
CLAMPCHECK(ZSTD_c_chainLog, value);
CCtxParams->cParams.chainLog = value;
return CCtxParams->cParams.chainLog;
case ZSTD_c_searchLog :
if (value!=0) /* 0 => use default */
CLAMPCHECK(value, ZSTD_SEARCHLOG_MIN, ZSTD_SEARCHLOG_MAX);
CLAMPCHECK(ZSTD_c_searchLog, value);
CCtxParams->cParams.searchLog = value;
return value;
case ZSTD_c_minMatch :
if (value!=0) /* 0 => use default */
CLAMPCHECK(value, ZSTD_MINMATCH_MIN, ZSTD_MINMATCH_MAX);
CLAMPCHECK(ZSTD_c_minMatch, value);
CCtxParams->cParams.minMatch = value;
return CCtxParams->cParams.minMatch;
@@ -528,7 +540,7 @@ size_t ZSTD_CCtxParam_setParameter(ZSTD_CCtx_params* CCtxParams,
case ZSTD_c_compressionStrategy :
if (value!=0) /* 0 => use default */
CLAMPCHECK(value, (int)ZSTD_fast, (int)ZSTD_btultra);
CLAMPCHECK(ZSTD_c_compressionStrategy, value);
CCtxParams->cParams.strategy = (ZSTD_strategy)value;
return (size_t)CCtxParams->cParams.strategy;
@@ -554,7 +566,7 @@ size_t ZSTD_CCtxParam_setParameter(ZSTD_CCtx_params* CCtxParams,
case ZSTD_c_forceAttachDict : {
const ZSTD_dictAttachPref_e pref = (ZSTD_dictAttachPref_e)value;
CLAMPCHECK(pref, ZSTD_dictDefaultAttach, ZSTD_dictForceCopy);
CLAMPCHECK(ZSTD_c_forceAttachDict, pref);
CCtxParams->attachDictPref = pref;
return CCtxParams->attachDictPref;
}
@@ -594,19 +606,19 @@ size_t ZSTD_CCtxParam_setParameter(ZSTD_CCtx_params* CCtxParams,
case ZSTD_c_ldmHashLog :
if (value!=0) /* 0 ==> auto */
CLAMPCHECK(value, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX);
CLAMPCHECK(ZSTD_c_ldmHashLog, value);
CCtxParams->ldmParams.hashLog = value;
return CCtxParams->ldmParams.hashLog;
case ZSTD_c_ldmMinMatch :
if (value!=0) /* 0 ==> default */
CLAMPCHECK(value, ZSTD_LDM_MINMATCH_MIN, ZSTD_LDM_MINMATCH_MAX);
CLAMPCHECK(ZSTD_c_ldmMinMatch, value);
CCtxParams->ldmParams.minMatchLength = value;
return CCtxParams->ldmParams.minMatchLength;
case ZSTD_c_ldmBucketSizeLog :
if (value!=0) /* 0 ==> default */
CLAMPCHECK(value, ZSTD_LDM_BUCKETSIZELOG_MIN, ZSTD_LDM_BUCKETSIZELOG_MAX);
CLAMPCHECK(ZSTD_c_ldmBucketSizeLog, value);
CCtxParams->ldmParams.bucketSizeLog = value;
return CCtxParams->ldmParams.bucketSizeLog;
@@ -832,16 +844,15 @@ size_t ZSTD_CCtx_reset(ZSTD_CCtx* cctx, ZSTD_ResetDirective reset)
@return : 0, or an error code if one value is beyond authorized range */
size_t ZSTD_checkCParams(ZSTD_compressionParameters cParams)
{
CLAMPCHECK(cParams.windowLog, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX);
CLAMPCHECK(cParams.chainLog, ZSTD_CHAINLOG_MIN, ZSTD_CHAINLOG_MAX);
CLAMPCHECK(cParams.hashLog, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX);
CLAMPCHECK(cParams.searchLog, ZSTD_SEARCHLOG_MIN, ZSTD_SEARCHLOG_MAX);
CLAMPCHECK(cParams.minMatch, ZSTD_MINMATCH_MIN, ZSTD_MINMATCH_MAX);
CLAMPCHECK(ZSTD_c_windowLog, cParams.windowLog);
CLAMPCHECK(ZSTD_c_chainLog, cParams.chainLog);
CLAMPCHECK(ZSTD_c_hashLog, cParams.hashLog);
CLAMPCHECK(ZSTD_c_searchLog, cParams.searchLog);
CLAMPCHECK(ZSTD_c_minMatch, cParams.minMatch);
ZSTD_STATIC_ASSERT(ZSTD_TARGETLENGTH_MIN == 0);
if (cParams.targetLength > ZSTD_TARGETLENGTH_MAX)
return ERROR(parameter_outOfBound);
if ((U32)(cParams.strategy) > (U32)ZSTD_btultra)
return ERROR(parameter_unsupported);
CLAMPCHECK(ZSTD_c_compressionStrategy, cParams.strategy);
return 0;
}
@@ -851,19 +862,20 @@ size_t ZSTD_checkCParams(ZSTD_compressionParameters cParams)
static ZSTD_compressionParameters
ZSTD_clampCParams(ZSTD_compressionParameters cParams)
{
# define CLAMP(val,min,max) { \
if (val<min) val=min; \
else if (val>max) val=max; \
# define CLAMP(cParam, val) { \
ZSTD_bounds const bounds = ZSTD_cParam_getBounds(cParam); \
if (val<bounds.lowerBound) val=bounds.lowerBound; \
else if (val>bounds.upperBound) val=bounds.upperBound; \
}
CLAMP(cParams.windowLog, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX);
CLAMP(cParams.chainLog, ZSTD_CHAINLOG_MIN, ZSTD_CHAINLOG_MAX);
CLAMP(cParams.hashLog, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX);
CLAMP(cParams.searchLog, ZSTD_SEARCHLOG_MIN, ZSTD_SEARCHLOG_MAX);
CLAMP(cParams.minMatch, ZSTD_MINMATCH_MIN, ZSTD_MINMATCH_MAX);
CLAMP(ZSTD_c_windowLog, cParams.windowLog);
CLAMP(ZSTD_c_chainLog, cParams.chainLog);
CLAMP(ZSTD_c_hashLog, cParams.hashLog);
CLAMP(ZSTD_c_searchLog, cParams.searchLog);
CLAMP(ZSTD_c_minMatch, cParams.minMatch);
ZSTD_STATIC_ASSERT(ZSTD_TARGETLENGTH_MIN == 0);
if (cParams.targetLength > ZSTD_TARGETLENGTH_MAX)
cParams.targetLength = ZSTD_TARGETLENGTH_MAX;
CLAMP(cParams.strategy, ZSTD_fast, ZSTD_btultra);
CLAMP(ZSTD_c_compressionStrategy, cParams.strategy);
return cParams;
}
@@ -951,8 +963,7 @@ ZSTD_sizeof_matchState(const ZSTD_compressionParameters* const cParams,
size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32);
size_t const optPotentialSpace = ((MaxML+1) + (MaxLL+1) + (MaxOff+1) + (1<<Litbits)) * sizeof(U32)
+ (ZSTD_OPT_NUM+1) * (sizeof(ZSTD_match_t)+sizeof(ZSTD_optimal_t));
size_t const optSpace = (forCCtx && ((cParams->strategy == ZSTD_btopt) ||
(cParams->strategy == ZSTD_btultra)))
size_t const optSpace = (forCCtx && (cParams->strategy >= ZSTD_btopt))
? optPotentialSpace
: 0;
DEBUGLOG(4, "chainSize: %u - hSize: %u - h3Size: %u",
@@ -1253,7 +1264,7 @@ ZSTD_reset_matchState(ZSTD_matchState_t* ms,
ZSTD_invalidateMatchState(ms);
/* opt parser space */
if (forCCtx && ((cParams->strategy == ZSTD_btopt) | (cParams->strategy == ZSTD_btultra))) {
if (forCCtx && (cParams->strategy >= ZSTD_btopt)) {
DEBUGLOG(4, "reserving optimal parser space");
ms->opt.litFreq = (U32*)ptr;
ms->opt.litLengthFreq = ms->opt.litFreq + (1<<Litbits);
@@ -1465,16 +1476,17 @@ void ZSTD_invalidateRepCodes(ZSTD_CCtx* cctx) {
* dictionary tables into the working context is faster than using them
* in-place.
*/
static const size_t attachDictSizeCutoffs[(unsigned)ZSTD_btultra+1] = {
8 KB, /* unused */
8 KB, /* ZSTD_fast */
static const size_t attachDictSizeCutoffs[(unsigned)ZSTD_btultra2+1] = {
8 KB, /* unused */
8 KB, /* ZSTD_fast */
16 KB, /* ZSTD_dfast */
32 KB, /* ZSTD_greedy */
32 KB, /* ZSTD_lazy */
32 KB, /* ZSTD_lazy2 */
32 KB, /* ZSTD_btlazy2 */
32 KB, /* ZSTD_btopt */
8 KB /* ZSTD_btultra */
8 KB, /* ZSTD_btultra */
8 KB /* ZSTD_btultra2 */
};
static int ZSTD_shouldAttachDict(const ZSTD_CDict* cdict,
@@ -1829,7 +1841,9 @@ static size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t dstCapacity, cons
* note : use same formula for both situations */
static size_t ZSTD_minGain(size_t srcSize, ZSTD_strategy strat)
{
U32 const minlog = (strat==ZSTD_btultra) ? 7 : 6;
U32 const minlog = (U32)strat - 1;
ZSTD_STATIC_ASSERT(ZSTD_btopt == 7);
assert(strat >= ZSTD_btopt);
return (srcSize >> minlog) + 2;
}
@@ -2536,7 +2550,7 @@ ZSTD_compressSequences(seqStore_t* seqStorePtr,
* assumption : strat is a valid strategy */
ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_dictMode_e dictMode)
{
static const ZSTD_blockCompressor blockCompressor[3][(unsigned)ZSTD_btultra+1] = {
static const ZSTD_blockCompressor blockCompressor[3][(unsigned)ZSTD_btultra2+1] = {
{ ZSTD_compressBlock_fast /* default for 0 */,
ZSTD_compressBlock_fast,
ZSTD_compressBlock_doubleFast,
@@ -2545,6 +2559,7 @@ ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_dictMo
ZSTD_compressBlock_lazy2,
ZSTD_compressBlock_btlazy2,
ZSTD_compressBlock_btopt,
ZSTD_compressBlock_btultra,
ZSTD_compressBlock_btultra },
{ ZSTD_compressBlock_fast_extDict /* default for 0 */,
ZSTD_compressBlock_fast_extDict,
@@ -2554,6 +2569,7 @@ ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_dictMo
ZSTD_compressBlock_lazy2_extDict,
ZSTD_compressBlock_btlazy2_extDict,
ZSTD_compressBlock_btopt_extDict,
ZSTD_compressBlock_btultra_extDict,
ZSTD_compressBlock_btultra_extDict },
{ ZSTD_compressBlock_fast_dictMatchState /* default for 0 */,
ZSTD_compressBlock_fast_dictMatchState,
@@ -2563,14 +2579,14 @@ ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_dictMo
ZSTD_compressBlock_lazy2_dictMatchState,
ZSTD_compressBlock_btlazy2_dictMatchState,
ZSTD_compressBlock_btopt_dictMatchState,
ZSTD_compressBlock_btultra_dictMatchState,
ZSTD_compressBlock_btultra_dictMatchState }
};
ZSTD_blockCompressor selectedCompressor;
ZSTD_STATIC_ASSERT((unsigned)ZSTD_fast == 1);
assert((U32)strat >= (U32)ZSTD_fast);
assert((U32)strat <= (U32)ZSTD_btultra);
selectedCompressor = blockCompressor[(int)dictMode][(U32)strat];
assert(ZSTD_cParam_withinBounds(ZSTD_c_compressionStrategy, strat));
selectedCompressor = blockCompressor[(int)dictMode][(int)strat];
assert(selectedCompressor != NULL);
return selectedCompressor;
}
@@ -2967,6 +2983,7 @@ static size_t ZSTD_loadDictionaryContent(ZSTD_matchState_t* ms,
case ZSTD_btlazy2: /* we want the dictionary table fully sorted */
case ZSTD_btopt:
case ZSTD_btultra:
case ZSTD_btultra2:
if (srcSize >= HASH_READ_SIZE)
ZSTD_updateTree(ms, iend-HASH_READ_SIZE, iend);
break;