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changed contentLog -> chainLog

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This commit is contained in:
Yann Collet 2016-04-04 13:49:18 +02:00
parent 1005fc1276
commit 8a57b928ba
4 changed files with 38 additions and 38 deletions
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50
lib/zstd_compress.c
View File

@ -107,7 +107,7 @@ struct ZSTD_CCtx_s
seqStore_t seqStore; /* sequences storage ptrs */
U32* hashTable;
U32* hashTable3;
U32* contentTable;
U32* chainTable;
HUF_CElt* hufTable;
U32 flagStaticTables;
FSE_CTable offcodeCTable [FSE_CTABLE_SIZE_U32(OffFSELog, MaxOff)];
@ -142,7 +142,7 @@ const seqStore_t* ZSTD_getSeqStore(const ZSTD_CCtx* ctx) /* hidden interface *
size_t ZSTD_checkCParams(ZSTD_compressionParameters cParams)
{
CLAMPCHECK(cParams.windowLog, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX);
CLAMPCHECK(cParams.contentLog, ZSTD_CONTENTLOG_MIN, ZSTD_CONTENTLOG_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);
{ U32 const searchLengthMin = (cParams.strategy == ZSTD_btopt) ? ZSTD_SEARCHLENGTH_MIN : ZSTD_SEARCHLENGTH_MIN+1;
@ -162,8 +162,8 @@ size_t ZSTD_checkCParams_advanced(ZSTD_compressionParameters cParams, U64 srcSiz
{
if (srcSize > (1ULL << ZSTD_WINDOWLOG_MIN)) return ZSTD_checkCParams(cParams);
if (cParams.windowLog < ZSTD_WINDOWLOG_ABSOLUTEMIN) return ERROR(compressionParameter_unsupported);
if (srcSize <= (1ULL << cParams.windowLog)) cParams.windowLog = ZSTD_WINDOWLOG_MIN; /* fake value - temporary work around */
if (srcSize <= (1ULL << cParams.contentLog)) cParams.contentLog = ZSTD_CONTENTLOG_MIN; /* fake value - temporary work around */
if (srcSize <= (1ULL << cParams.windowLog)) cParams.windowLog = ZSTD_WINDOWLOG_MIN; /* fake value - temporary work around */
if (srcSize <= (1ULL << cParams.chainLog)) cParams.chainLog = ZSTD_CHAINLOG_MIN; /* fake value - temporary work around */
if ((srcSize <= (1ULL << cParams.hashLog)) && ((U32)cParams.strategy < (U32)ZSTD_btlazy2)) cParams.hashLog = ZSTD_HASHLOG_MIN; /* fake value - temporary work around */
return ZSTD_checkCParams(cParams);
}
@ -188,8 +188,8 @@ void ZSTD_adjustCParams(ZSTD_compressionParameters* params, U64 srcSize, size_t
} }
if (params->hashLog > params->windowLog) params->hashLog = params->windowLog;
{ U32 const btPlus = (params->strategy == ZSTD_btlazy2) || (params->strategy == ZSTD_btopt);
U32 const maxContentLog = params->windowLog+btPlus;
if (params->contentLog > maxContentLog) params->contentLog = maxContentLog; } /* <= ZSTD_CONTENTLOG_MAX */
U32 const maxChainLog = params->windowLog+btPlus;
if (params->chainLog > maxChainLog) params->chainLog = maxChainLog; } /* <= ZSTD_CHAINLOG_MAX */
if (params->windowLog < ZSTD_WINDOWLOG_ABSOLUTEMIN) params->windowLog = ZSTD_WINDOWLOG_ABSOLUTEMIN; /* required for frame header */
if ((params->hashLog < ZSTD_HASHLOG_MIN) && ((U32)params->strategy >= (U32)ZSTD_btlazy2)) params->hashLog = ZSTD_HASHLOG_MIN; /* required to ensure collision resistance in bt */
@ -217,10 +217,10 @@ static size_t ZSTD_resetCCtx_advanced (ZSTD_CCtx* zc,
const U32 divider = (params.cParams.searchLength==3) ? 3 : 4;
const size_t maxNbSeq = blockSize / divider;
const size_t tokenSpace = blockSize + 11*maxNbSeq;
const size_t contentSize = (params.cParams.strategy == ZSTD_fast) ? 0 : (1 << params.cParams.contentLog);
const size_t chainSize = (params.cParams.strategy == ZSTD_fast) ? 0 : (1 << params.cParams.chainLog);
const size_t hSize = 1 << params.cParams.hashLog;
const size_t h3Size = (params.cParams.searchLength==3) ? (1 << HASHLOG3) : 0;
const size_t tableSpace = (contentSize + hSize + h3Size) * sizeof(U32);
const size_t tableSpace = (chainSize + hSize + h3Size) * sizeof(U32);
/* Check if workSpace is large enough, alloc a new one if needed */
{ size_t const optSpace = ((MaxML+1) + (MaxLL+1) + (1<<Offbits) + (1<<Litbits))*sizeof(U32)
@ -237,8 +237,8 @@ static size_t ZSTD_resetCCtx_advanced (ZSTD_CCtx* zc,
memset(zc->workSpace, 0, tableSpace ); /* reset only tables */
zc->hashTable3 = (U32*)(zc->workSpace);
zc->hashTable = zc->hashTable3 + h3Size;
zc->contentTable = zc->hashTable + hSize;
zc->seqStore.buffer = zc->contentTable + contentSize;
zc->chainTable = zc->hashTable + hSize;
zc->seqStore.buffer = zc->chainTable + chainSize;
zc->hufTable = (HUF_CElt*)zc->seqStore.buffer;
zc->flagStaticTables = 0;
zc->seqStore.buffer = ((U32*)(zc->seqStore.buffer)) + 256;
@ -289,10 +289,10 @@ size_t ZSTD_copyCCtx(ZSTD_CCtx* dstCCtx, const ZSTD_CCtx* srcCCtx)
ZSTD_resetCCtx_advanced(dstCCtx, srcCCtx->params);
/* copy tables */
{ const size_t contentSize = (srcCCtx->params.cParams.strategy == ZSTD_fast) ? 0 : (1 << srcCCtx->params.cParams.contentLog);
{ const size_t chaineSize = (srcCCtx->params.cParams.strategy == ZSTD_fast) ? 0 : (1 << srcCCtx->params.cParams.chainLog);
const size_t hSize = 1 << srcCCtx->params.cParams.hashLog;
const size_t h3Size = (srcCCtx->params.cParams.searchLength == 3) ? (1 << HASHLOG3) : 0;
const size_t tableSpace = (contentSize + hSize + h3Size) * sizeof(U32);
const size_t tableSpace = (chaineSize + hSize + h3Size) * sizeof(U32);
memcpy(dstCCtx->workSpace, srcCCtx->workSpace, tableSpace);
}
@ -341,8 +341,8 @@ static void ZSTD_reduceIndex (ZSTD_CCtx* zc, const U32 reducerValue)
{ const U32 hSize = 1 << zc->params.cParams.hashLog;
ZSTD_reduceTable(zc->hashTable, hSize, reducerValue); }
{ const U32 contentSize = (zc->params.cParams.strategy == ZSTD_fast) ? 0 : (1 << zc->params.cParams.contentLog);
ZSTD_reduceTable(zc->contentTable, contentSize, reducerValue); }
{ const U32 chainSize = (zc->params.cParams.strategy == ZSTD_fast) ? 0 : (1 << zc->params.cParams.chainLog);
ZSTD_reduceTable(zc->chainTable, chainSize, reducerValue); }
{ const U32 h3Size = (zc->params.cParams.searchLength == 3) ? (1 << HASHLOG3) : 0;
ZSTD_reduceTable(zc->hashTable3, h3Size, reducerValue); }
@ -1257,8 +1257,8 @@ static U32 ZSTD_insertBt1(ZSTD_CCtx* zc, const BYTE* const ip, const U32 mls, co
U32* const hashTable = zc->hashTable;
const U32 hashLog = zc->params.cParams.hashLog;
const size_t h = ZSTD_hashPtr(ip, hashLog, mls);
U32* const bt = zc->contentTable;
const U32 btLog = zc->params.cParams.contentLog - 1;
U32* const bt = zc->chainTable;
const U32 btLog = zc->params.cParams.chainLog - 1;
const U32 btMask= (1 << btLog) - 1;
U32 matchIndex = hashTable[h];
size_t commonLengthSmaller=0, commonLengthLarger=0;
@ -1359,8 +1359,8 @@ static size_t ZSTD_insertBtAndFindBestMatch (
U32* const hashTable = zc->hashTable;
const U32 hashLog = zc->params.cParams.hashLog;
const size_t h = ZSTD_hashPtr(ip, hashLog, mls);
U32* const bt = zc->contentTable;
const U32 btLog = zc->params.cParams.contentLog - 1;
U32* const bt = zc->chainTable;
const U32 btLog = zc->params.cParams.chainLog - 1;
const U32 btMask= (1 << btLog) - 1;
U32 matchIndex = hashTable[h];
size_t commonLengthSmaller=0, commonLengthLarger=0;
@ -1520,8 +1520,8 @@ U32 ZSTD_insertAndFindFirstIndex (ZSTD_CCtx* zc, const BYTE* ip, U32 mls)
{
U32* const hashTable = zc->hashTable;
const U32 hashLog = zc->params.cParams.hashLog;
U32* const chainTable = zc->contentTable;
const U32 chainMask = (1 << zc->params.cParams.contentLog) - 1;
U32* const chainTable = zc->chainTable;
const U32 chainMask = (1 << zc->params.cParams.chainLog) - 1;
const BYTE* const base = zc->base;
const U32 target = (U32)(ip - base);
U32 idx = zc->nextToUpdate;
@ -1545,8 +1545,8 @@ size_t ZSTD_HcFindBestMatch_generic (
size_t* offsetPtr,
const U32 maxNbAttempts, const U32 mls, const U32 extDict)
{
U32* const chainTable = zc->contentTable;
const U32 chainSize = (1 << zc->params.cParams.contentLog);
U32* const chainTable = zc->chainTable;
const U32 chainSize = (1 << zc->params.cParams.chainLog);
const U32 chainMask = chainSize-1;
const BYTE* const base = zc->base;
const BYTE* const dictBase = zc->dictBase;
@ -2084,8 +2084,8 @@ static size_t ZSTD_compressContinue_internal (ZSTD_CCtx* zc,
/* preemptive overflow correction */
if (zc->lowLimit > (1<<30)) {
U32 const btplus = (zc->params.cParams.strategy == ZSTD_btlazy2) || (zc->params.cParams.strategy == ZSTD_btopt);
U32 const contentMask = (1 << (zc->params.cParams.contentLog - btplus)) - 1;
U32 const newLowLimit = zc->lowLimit & contentMask; /* preserve position % contentSize */
U32 const chainMask = (1 << (zc->params.cParams.chainLog - btplus)) - 1;
U32 const newLowLimit = zc->lowLimit & chainMask; /* preserve position % chainSize */
U32 const correction = zc->lowLimit - newLowLimit;
ZSTD_reduceIndex(zc, correction);
zc->base += correction;
@ -2536,7 +2536,7 @@ ZSTD_compressionParameters ZSTD_getCParams(int compressionLevel, U64 srcSize, si
cp = ZSTD_defaultCParameters[tableID][compressionLevel];
if (MEM_32bits()) { /* auto-correction, for 32-bits mode */
if (cp.windowLog > ZSTD_WINDOWLOG_MAX) cp.windowLog = ZSTD_WINDOWLOG_MAX;
if (cp.contentLog > ZSTD_CONTENTLOG_MAX) cp.contentLog = ZSTD_CONTENTLOG_MAX;
if (cp.chainLog > ZSTD_CHAINLOG_MAX) cp.chainLog = ZSTD_CHAINLOG_MAX;
if (cp.hashLog > ZSTD_HASHLOG_MAX) cp.hashLog = ZSTD_HASHLOG_MAX;
}
return cp;

4
lib/zstd_opt.h
View File

@ -222,8 +222,8 @@ static U32 ZSTD_insertBtAndGetAllMatches (
const size_t h = ZSTD_hashPtr(ip, hashLog, mls);
U32* const hashTable = zc->hashTable;
U32 matchIndex = hashTable[h];
U32* const bt = zc->contentTable;
const U32 btLog = zc->params.cParams.contentLog - 1;
U32* const bt = zc->chainTable;
const U32 btLog = zc->params.cParams.chainLog - 1;
const U32 btMask= (1U << btLog) - 1;
size_t commonLengthSmaller=0, commonLengthLarger=0;
const BYTE* const dictBase = zc->dictBase;

6
lib/zstd_static.h
View File

@ -59,8 +59,8 @@ extern "C" {
***************************************/
#define ZSTD_WINDOWLOG_MAX (MEM_32bits() ? 25 : 27)
#define ZSTD_WINDOWLOG_MIN 18
#define ZSTD_CONTENTLOG_MAX (ZSTD_WINDOWLOG_MAX+1)
#define ZSTD_CONTENTLOG_MIN 4
#define ZSTD_CHAINLOG_MAX (ZSTD_WINDOWLOG_MAX+1)
#define ZSTD_CHAINLOG_MIN 4
#define ZSTD_HASHLOG_MAX ZSTD_WINDOWLOG_MAX
#define ZSTD_HASHLOG_MIN 12
#define ZSTD_SEARCHLOG_MAX (ZSTD_WINDOWLOG_MAX-1)
@ -75,7 +75,7 @@ typedef enum { ZSTD_fast, ZSTD_greedy, ZSTD_lazy, ZSTD_lazy2, ZSTD_btlazy2, ZSTD
typedef struct {
U32 windowLog; /* largest match distance : larger == more compression, more memory needed during decompression */
U32 contentLog; /* full search segment : larger == more compression, slower, more memory (useless for fast) */
U32 chainLog; /* fully searched segment : larger == more compression, slower, more memory (useless for fast) */
U32 hashLog; /* dispatch table : larger == faster, more memory */
U32 searchLog; /* nb of searches : larger == more compression, slower */
U32 searchLength; /* match length searched : larger == faster decompression, sometimes less compression */

16
programs/paramgrill.c
View File

@ -262,7 +262,7 @@ static size_t BMK_benchParam(BMK_result_t* resultPtr,
void* const resultBuffer = malloc(srcSize);
ZSTD_parameters params;
U32 Wlog = cParams.windowLog;
U32 Clog = cParams.contentLog;
U32 Clog = cParams.chainLog;
U32 Hlog = cParams.hashLog;
U32 Slog = cParams.searchLog;
U32 Slength = cParams.searchLength;
@ -415,7 +415,7 @@ static void BMK_printWinner(FILE* f, U32 cLevel, BMK_result_t result, ZSTD_compr
{
DISPLAY("\r%79s\r", "");
fprintf(f," {%3u,%3u,%3u,%3u,%3u,%3u, %s }, ",
params.windowLog, params.contentLog, params.hashLog, params.searchLog, params.searchLength,
params.windowLog, params.chainLog, params.hashLog, params.searchLog, params.searchLength,
params.targetLength, g_stratName[(U32)(params.strategy)]);
fprintf(f,
"/* level %2u */ /* R:%5.3f at %5.1f MB/s - %5.1f MB/s */\n",
@ -549,7 +549,7 @@ static ZSTD_compressionParameters* sanitizeParams(ZSTD_compressionParameters par
{
g_params = params;
if (params.strategy == ZSTD_fast)
g_params.contentLog = 0, g_params.searchLog = 0;
g_params.chainLog = 0, g_params.searchLog = 0;
if (params.strategy != ZSTD_btopt )
g_params.targetLength = 0;
return &g_params;
@ -568,9 +568,9 @@ static void paramVariation(ZSTD_compressionParameters* ptr)
switch(changeID)
{
case 0:
p.contentLog++; break;
p.chainLog++; break;
case 1:
p.contentLog--; break;
p.chainLog--; break;
case 2:
p.hashLog++; break;
case 3:
@ -651,7 +651,7 @@ static void potentialRandomParams(ZSTD_compressionParameters* p, U32 inverseChan
if (!chance)
while (!validated) {
/* totally random entry */
p->contentLog = FUZ_rand(&g_rand) % (ZSTD_CONTENTLOG_MAX+1 - ZSTD_CONTENTLOG_MIN) + ZSTD_CONTENTLOG_MIN;
p->chainLog = FUZ_rand(&g_rand) % (ZSTD_CHAINLOG_MAX+1 - ZSTD_CHAINLOG_MIN) + ZSTD_CHAINLOG_MIN;
p->hashLog = FUZ_rand(&g_rand) % (ZSTD_HASHLOG_MAX+1 - ZSTD_HASHLOG_MIN) + ZSTD_HASHLOG_MIN;
p->searchLog = FUZ_rand(&g_rand) % (ZSTD_SEARCHLOG_MAX+1 - ZSTD_SEARCHLOG_MIN) + ZSTD_SEARCHLOG_MIN;
p->windowLog = FUZ_rand(&g_rand) % (ZSTD_WINDOWLOG_MAX+1 - ZSTD_WINDOWLOG_MIN) + ZSTD_WINDOWLOG_MIN;
@ -1048,10 +1048,10 @@ int main(int argc, char** argv)
g_params.windowLog *= 10, g_params.windowLog += *argument++ - '0';
continue;
case 'c':
g_params.contentLog = 0;
g_params.chainLog = 0;
argument++;
while ((*argument>= '0') && (*argument<='9'))
g_params.contentLog *= 10, g_params.contentLog += *argument++ - '0';
g_params.chainLog *= 10, g_params.chainLog += *argument++ - '0';
continue;
case 'h':
g_params.hashLog = 0;