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Introduced new compression level settings 

Changed position of parameter TargetLength
dev
Yann Collet 2016-02-13 02:07:24 +01:00
parent 82f4d7da03
commit 23e8aee224
4 changed files with 103 additions and 120 deletions
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196
lib/zstd_compress.c
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@ -74,6 +74,7 @@ size_t ZSTD_compressBound(size_t srcSize) { return FSE_compressBound(srcSize) +
/*-*************************************
* Sequence storage
***************************************/
/** ZSTD_resetFreqs() : for opt variants */
static void ZSTD_resetFreqs(seqStore_t* ssPtr)
{
unsigned u;
@ -99,8 +100,6 @@ static void ZSTD_resetSeqStore(seqStore_t* ssPtr)
ssPtr->litLength = ssPtr->litLengthStart;
ssPtr->matchLength = ssPtr->matchLengthStart;
ssPtr->dumps = ssPtr->dumpsStart;
ZSTD_resetFreqs(ssPtr);
}
@ -2261,122 +2260,109 @@ size_t ZSTD_compress(void* dst, size_t maxDstSize, const void* src, size_t srcSi
/*-===== Pre-defined compression levels =====-*/
#define ZSTD_MAX_CLEVEL 25
#define ZSTD_MAX_CLEVEL 21
unsigned ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; }
static const ZSTD_parameters ZSTD_defaultParameters[4][ZSTD_MAX_CLEVEL+1] = {
{ /* "default" */
/* SL, W, C, H, S, L, strat */
{ 0, 0, 18, 12, 12, 1, 4, ZSTD_fast }, /* level 0 - never used */
{ 0, 0, 19, 13, 14, 1, 7, ZSTD_fast }, /* level 1 */
{ 0, 0, 19, 15, 16, 1, 6, ZSTD_fast }, /* level 2 */
{ 0, 0, 20, 18, 20, 1, 6, ZSTD_fast }, /* level 3 */
{ 0, 0, 21, 19, 21, 1, 6, ZSTD_fast }, /* level 4 */
{ 0, 0, 20, 14, 18, 3, 5, ZSTD_greedy }, /* level 5 */
{ 0, 0, 20, 18, 19, 3, 5, ZSTD_greedy }, /* level 6 */
{ 0, 0, 21, 17, 20, 3, 5, ZSTD_lazy }, /* level 7 */
{ 0, 0, 21, 19, 20, 3, 5, ZSTD_lazy }, /* level 8 */
{ 0, 0, 21, 20, 20, 3, 5, ZSTD_lazy2 }, /* level 9 */
{ 0, 0, 21, 19, 21, 4, 5, ZSTD_lazy2 }, /* level 10 */
{ 0, 0, 22, 20, 22, 4, 5, ZSTD_lazy2 }, /* level 11 */ // 42498419
{ 0, 0, 22, 20, 22, 5, 5, ZSTD_lazy2 }, /* level 12 */
{ 0, 0, 22, 21, 22, 5, 5, ZSTD_lazy2 }, /* level 13 */
{ 0, 0, 22, 22, 23, 5, 5, ZSTD_lazy2 }, /* level 14 */
{ 0, 0, 23, 23, 23, 5, 5, ZSTD_lazy2 }, /* level 15 */
{ 0, 0, 23, 21, 22, 5, 5, ZSTD_btlazy2 }, /* level 16 */ // 42113689
{ 0, 0, 23, 24, 23, 4, 5, ZSTD_btlazy2 }, /* level 17 */
{ 0, 0, 25, 24, 23, 5, 5, ZSTD_btlazy2 }, /* level 18 */
{ 0, 0, 25, 26, 23, 5, 5, ZSTD_btlazy2 }, /* level 19 */
{ 0, 12, 22, 20, 21, 3, 5, ZSTD_opt }, /* level 20 */
{ 0, 16, 23, 21, 22, 4, 4, ZSTD_opt }, /* level 21 */
{ 0, 32, 25, 25, 24, 5, 4, ZSTD_opt_bt }, /* level 22 */
{ 0, 64, 25, 26, 24, 6, 4, ZSTD_opt_bt }, /* level 23 */
{ 0,128, 26, 26, 25, 8, 4, ZSTD_opt_bt }, /* level 24 */
{ 0,256, 26, 27, 25, 10, 4, ZSTD_opt_bt }, /* level 25 */
/* l, W, C, H, S, L, SL, strat */
{ 0, 0, 0, 0, 0, 0, 0, ZSTD_fast }, /* level 0 - never used */
{ 0, 19, 13, 14, 1, 7, 4, ZSTD_fast }, /* level 1 */
{ 0, 19, 15, 16, 1, 6, 4, ZSTD_fast }, /* level 2 */
{ 0, 20, 18, 20, 1, 6, 4, ZSTD_fast }, /* level 3 */
{ 0, 21, 19, 21, 1, 6, 4, ZSTD_fast }, /* level 4 */
{ 0, 20, 14, 18, 3, 5, 4, ZSTD_greedy }, /* level 5 */
{ 0, 20, 18, 19, 3, 5, 4, ZSTD_greedy }, /* level 6 */
{ 0, 21, 17, 20, 3, 5, 4, ZSTD_lazy }, /* level 7 */
{ 0, 21, 19, 20, 3, 5, 4, ZSTD_lazy }, /* level 8 */
{ 0, 21, 20, 20, 3, 5, 4, ZSTD_lazy2 }, /* level 9 */
{ 0, 21, 19, 21, 4, 5, 4, ZSTD_lazy2 }, /* level 10 */
{ 0, 22, 20, 22, 4, 5, 4, ZSTD_lazy2 }, /* level 11 */
{ 0, 22, 20, 22, 5, 5, 4, ZSTD_lazy2 }, /* level 12 */
{ 0, 22, 21, 22, 5, 5, 4, ZSTD_lazy2 }, /* level 13 */
{ 0, 22, 22, 23, 5, 5, 4, ZSTD_lazy2 }, /* level 14 */
{ 0, 23, 23, 23, 5, 5, 4, ZSTD_lazy2 }, /* level 15 */
{ 0, 23, 21, 22, 5, 5, 4, ZSTD_btlazy2 }, /* level 16 */
{ 0, 23, 24, 23, 4, 5, 4, ZSTD_btlazy2 }, /* level 17 */
{ 0, 24, 25, 24, 4, 4, 24, ZSTD_opt_bt }, /* level 18 */
{ 0, 25, 25, 24, 5, 4, 40, ZSTD_opt_bt }, /* level 19 */
{ 0, 26, 26, 25, 8, 4,256, ZSTD_opt_bt }, /* level 20 */
{ 0, 26, 27, 25, 10, 4,256, ZSTD_opt_bt }, /* level 21 */
},
{ /* for srcSize <= 256 KB */
/* SL, W, C, H, S, L, strat */
{ 0, 0, 18, 13, 14, 1, 7, ZSTD_fast }, /* level 0 - never used */
{ 0, 0, 18, 14, 15, 1, 6, ZSTD_fast }, /* level 1 */
{ 0, 0, 18, 14, 15, 1, 5, ZSTD_fast }, /* level 2 */
{ 0, 0, 18, 12, 15, 3, 4, ZSTD_greedy }, /* level 3 */
{ 0, 0, 18, 13, 15, 4, 4, ZSTD_greedy }, /* level 4 */
{ 0, 0, 18, 14, 15, 5, 4, ZSTD_greedy }, /* level 5 */
{ 0, 0, 18, 13, 15, 4, 4, ZSTD_lazy }, /* level 6 */
{ 0, 0, 18, 14, 16, 5, 4, ZSTD_lazy }, /* level 7 */
{ 0, 0, 18, 15, 16, 6, 4, ZSTD_lazy }, /* level 8 */
{ 0, 0, 18, 15, 15, 7, 4, ZSTD_lazy }, /* level 9 */
{ 0, 0, 18, 16, 16, 7, 4, ZSTD_lazy }, /* level 10 */
{ 0, 0, 18, 16, 16, 8, 4, ZSTD_lazy }, /* level 11 */
{ 0, 0, 18, 17, 16, 8, 4, ZSTD_lazy }, /* level 12 */
{ 0, 0, 18, 17, 16, 9, 4, ZSTD_lazy }, /* level 13 */
{ 0, 0, 18, 18, 16, 9, 4, ZSTD_lazy }, /* level 14 */
{ 0, 0, 18, 17, 17, 9, 4, ZSTD_lazy2 }, /* level 15 */
{ 0, 0, 18, 18, 18, 9, 4, ZSTD_lazy2 }, /* level 16 */
{ 0, 0, 18, 18, 18, 10, 4, ZSTD_lazy2 }, /* level 17 */
{ 0, 0, 18, 18, 18, 11, 4, ZSTD_lazy2 }, /* level 18 */
{ 0, 0, 18, 18, 18, 12, 4, ZSTD_lazy2 }, /* level 19 */
{ 0, 0, 18, 18, 18, 13, 4, ZSTD_lazy2 }, /* level 20 */
{ 0, 0, 18, 18, 18, 10, 4, ZSTD_lazy2 }, /* level ??? */
{ 0, 0, 18, 18, 18, 11, 4, ZSTD_lazy2 }, /* level ??? */
{ 0, 0, 18, 18, 18, 12, 4, ZSTD_lazy2 }, /* level ??? */
{ 0, 0, 18, 18, 18, 13, 4, ZSTD_lazy2 }, /* level ??? */
{ 0, 18, 13, 14, 1, 7, 4, ZSTD_fast }, /* level 0 - never used */
{ 0, 18, 14, 15, 1, 6, 4, ZSTD_fast }, /* level 1 */
{ 0, 18, 14, 15, 1, 5, 4, ZSTD_fast }, /* level 2 */
{ 0, 18, 12, 15, 3, 4, 4, ZSTD_greedy }, /* level 3 */
{ 0, 18, 13, 15, 4, 4, 4, ZSTD_greedy }, /* level 4 */
{ 0, 18, 14, 15, 5, 4, 4, ZSTD_greedy }, /* level 5 */
{ 0, 18, 13, 15, 4, 4, 4, ZSTD_lazy }, /* level 6 */
{ 0, 18, 14, 16, 5, 4, 4, ZSTD_lazy }, /* level 7 */
{ 0, 18, 15, 16, 6, 4, 4, ZSTD_lazy }, /* level 8 */
{ 0, 18, 15, 15, 7, 4, 4, ZSTD_lazy }, /* level 9 */
{ 0, 18, 16, 16, 7, 4, 4, ZSTD_lazy }, /* level 10 */
{ 0, 18, 16, 16, 8, 4, 4, ZSTD_lazy }, /* level 11 */
{ 0, 18, 17, 16, 8, 4, 4, ZSTD_lazy }, /* level 12 */
{ 0, 18, 17, 16, 9, 4, 4, ZSTD_lazy }, /* level 13 */
{ 0, 18, 18, 16, 9, 4, 4, ZSTD_lazy }, /* level 14 */
{ 0, 18, 17, 17, 9, 4, 4, ZSTD_lazy2 }, /* level 15 */
{ 0, 18, 18, 18, 9, 4, 4, ZSTD_lazy2 }, /* level 16 */
{ 0, 18, 18, 18, 10, 4, 4, ZSTD_lazy2 }, /* level 17 */
{ 0, 18, 18, 18, 11, 4, 4, ZSTD_lazy2 }, /* level 18 */
{ 0, 18, 18, 18, 12, 4, 4, ZSTD_lazy2 }, /* level 19 */
{ 0, 18, 18, 18, 13, 4, 4, ZSTD_lazy2 }, /* level 20 */
{ 0, 18, 18, 18, 10, 4, 4, ZSTD_lazy2 }, /* level ??? */
},
{ /* for srcSize <= 128 KB */
/* W, C, H, S, L, strat */
{ 0, 0, 17, 12, 12, 1, 4, ZSTD_fast }, /* level 0 - never used */
{ 0, 0, 17, 12, 13, 1, 6, ZSTD_fast }, /* level 1 */
{ 0, 0, 17, 14, 16, 1, 5, ZSTD_fast }, /* level 2 */
{ 0, 0, 17, 15, 17, 1, 5, ZSTD_fast }, /* level 3 */
{ 0, 0, 17, 13, 15, 2, 4, ZSTD_greedy }, /* level 4 */
{ 0, 0, 17, 15, 17, 3, 4, ZSTD_greedy }, /* level 5 */
{ 0, 0, 17, 14, 17, 3, 4, ZSTD_lazy }, /* level 6 */
{ 0, 0, 17, 16, 17, 4, 4, ZSTD_lazy }, /* level 7 */
{ 0, 0, 17, 16, 17, 4, 4, ZSTD_lazy2 }, /* level 8 */
{ 0, 0, 17, 17, 16, 5, 4, ZSTD_lazy2 }, /* level 9 */
{ 0, 0, 17, 17, 16, 6, 4, ZSTD_lazy2 }, /* level 10 */
{ 0, 0, 17, 17, 16, 7, 4, ZSTD_lazy2 }, /* level 11 */
{ 0, 0, 17, 17, 16, 8, 4, ZSTD_lazy2 }, /* level 12 */
{ 0, 0, 17, 18, 16, 4, 4, ZSTD_btlazy2 }, /* level 13 */
{ 0, 0, 17, 18, 16, 5, 4, ZSTD_btlazy2 }, /* level 14 */
{ 0, 0, 17, 18, 16, 6, 4, ZSTD_btlazy2 }, /* level 15 */
{ 0, 0, 17, 18, 16, 7, 4, ZSTD_btlazy2 }, /* level 16 */
{ 0, 0, 17, 18, 16, 8, 4, ZSTD_btlazy2 }, /* level 17 */
{ 0, 0, 17, 18, 16, 9, 4, ZSTD_btlazy2 }, /* level 18 */
{ 0, 0, 17, 18, 16, 10, 4, ZSTD_btlazy2 }, /* level 19 */
{ 0, 0, 17, 18, 18, 12, 4, ZSTD_btlazy2 }, /* level 20 */
{ 0, 0, 17, 18, 16, 8, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 0, 17, 18, 16, 9, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 0, 17, 18, 16, 10, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 0, 17, 18, 18, 12, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 17, 12, 12, 1, 4, 4, ZSTD_fast }, /* level 0 - never used */
{ 0, 17, 12, 13, 1, 6, 4, ZSTD_fast }, /* level 1 */
{ 0, 17, 14, 16, 1, 5, 4, ZSTD_fast }, /* level 2 */
{ 0, 17, 15, 17, 1, 5, 4, ZSTD_fast }, /* level 3 */
{ 0, 17, 13, 15, 2, 4, 4, ZSTD_greedy }, /* level 4 */
{ 0, 17, 15, 17, 3, 4, 4, ZSTD_greedy }, /* level 5 */
{ 0, 17, 14, 17, 3, 4, 4, ZSTD_lazy }, /* level 6 */
{ 0, 17, 16, 17, 4, 4, 4, ZSTD_lazy }, /* level 7 */
{ 0, 17, 16, 17, 4, 4, 4, ZSTD_lazy2 }, /* level 8 */
{ 0, 17, 17, 16, 5, 4, 4, ZSTD_lazy2 }, /* level 9 */
{ 0, 17, 17, 16, 6, 4, 4, ZSTD_lazy2 }, /* level 10 */
{ 0, 17, 17, 16, 5, 4, 8, ZSTD_opt }, /* level 11 */
{ 0, 17, 17, 16, 6, 4,12, ZSTD_opt }, /* level 12 */
{ 0, 17, 18, 16, 4, 4, 4, ZSTD_btlazy2 }, /* level 13 */
{ 0, 17, 18, 16, 5, 4, 4, ZSTD_btlazy2 }, /* level 14 */
{ 0, 17, 18, 16, 6, 4, 4, ZSTD_btlazy2 }, /* level 15 */
{ 0, 17, 17, 16, 7, 4,16, ZSTD_opt }, /* level 16 */
{ 0, 17, 18, 16, 5, 4,20, ZSTD_opt_bt }, /* level 17 */
{ 0, 17, 18, 16, 6, 4,32, ZSTD_opt_bt }, /* level 18 */
{ 0, 17, 18, 16, 7, 4,64, ZSTD_opt_bt }, /* level 19 */
{ 0, 17, 18, 17, 9, 4,128, ZSTD_opt_bt }, /* level 20 */
{ 0, 17, 18, 17, 12, 4,256, ZSTD_opt_bt }, /* level ??? */
},
{ /* for srcSize <= 16 KB */
/* W, C, H, S, L, strat */
{ 0, 0, 0, 0, 0, 0, 0, ZSTD_fast }, /* level 0 - never used */
{ 0, 0, 14, 14, 14, 1, 4, ZSTD_fast }, /* level 1 */
{ 0, 0, 14, 14, 16, 1, 4, ZSTD_fast }, /* level 2 */
{ 0, 0, 14, 14, 14, 5, 4, ZSTD_greedy }, /* level 3 */
{ 0, 0, 14, 14, 14, 8, 4, ZSTD_greedy }, /* level 4 */
{ 0, 0, 14, 11, 14, 6, 4, ZSTD_lazy }, /* level 5 */
{ 0, 0, 14, 14, 13, 6, 5, ZSTD_lazy }, /* level 6 */
{ 0, 0, 14, 14, 14, 7, 6, ZSTD_lazy }, /* level 7 */
{ 0, 0, 14, 14, 14, 8, 4, ZSTD_lazy }, /* level 8 */
{ 0, 0, 14, 14, 15, 9, 4, ZSTD_lazy }, /* level 9 */
{ 0, 0, 14, 14, 15, 10, 4, ZSTD_lazy }, /* level 10 */
{ 0, 0, 14, 15, 15, 6, 4, ZSTD_btlazy2 }, /* level 11 */
{ 0, 0, 14, 15, 15, 7, 4, ZSTD_btlazy2 }, /* level 12 */
{ 0, 0, 14, 15, 15, 8, 4, ZSTD_btlazy2 }, /* level 13 */
{ 0, 0, 14, 15, 15, 9, 4, ZSTD_btlazy2 }, /* level 14 */
{ 0, 0, 14, 15, 15, 10, 4, ZSTD_btlazy2 }, /* level 15 */
{ 0, 0, 14, 15, 15, 11, 4, ZSTD_btlazy2 }, /* level 16 */
{ 0, 0, 14, 15, 15, 12, 4, ZSTD_btlazy2 }, /* level 17 */
{ 0, 0, 14, 15, 15, 13, 4, ZSTD_btlazy2 }, /* level 18 */
{ 0, 0, 14, 15, 15, 14, 4, ZSTD_btlazy2 }, /* level 19 */
{ 0, 0, 14, 15, 15, 15, 4, ZSTD_btlazy2 }, /* level 20 */
{ 0, 0, 14, 15, 15, 12, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 0, 14, 15, 15, 13, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 0, 14, 15, 15, 14, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 0, 14, 15, 15, 15, 4, ZSTD_btlazy2 }, /* level ??? */
{ 0, 0, 0, 0, 0, 0, 4, ZSTD_fast }, /* level 0 - never used */
{ 0, 14, 14, 14, 1, 4, 4, ZSTD_fast }, /* level 1 */
{ 0, 14, 14, 16, 1, 4, 4, ZSTD_fast }, /* level 2 */
{ 0, 14, 14, 14, 5, 4, 4, ZSTD_greedy }, /* level 3 */
{ 0, 14, 14, 14, 8, 4, 4, ZSTD_greedy }, /* level 4 */
{ 0, 14, 11, 14, 6, 4, 4, ZSTD_lazy }, /* level 5 */
{ 0, 14, 14, 13, 6, 5, 4, ZSTD_lazy }, /* level 6 */
{ 0, 14, 14, 14, 7, 6, 4, ZSTD_lazy }, /* level 7 */
{ 0, 14, 14, 14, 8, 4, 4, ZSTD_lazy }, /* level 8 */
{ 0, 14, 14, 15, 9, 4, 4, ZSTD_lazy }, /* level 9 */
{ 0, 14, 14, 15, 10, 4, 4, ZSTD_lazy }, /* level 10 */
{ 0, 14, 15, 15, 6, 4, 4, ZSTD_btlazy2 }, /* level 11 */
{ 0, 14, 15, 15, 7, 4, 4, ZSTD_btlazy2 }, /* level 12 */
{ 0, 14, 15, 15, 8, 4, 4, ZSTD_btlazy2 }, /* level 13 */
{ 0, 14, 15, 15, 9, 4, 4, ZSTD_btlazy2 }, /* level 14 */
{ 0, 14, 15, 15, 10, 4, 4, ZSTD_btlazy2 }, /* level 15 */
{ 0, 14, 15, 15, 11, 4, 4, ZSTD_btlazy2 }, /* level 16 */
{ 0, 14, 15, 15, 12, 4, 4, ZSTD_btlazy2 }, /* level 17 */
{ 0, 14, 15, 15, 13, 4, 4, ZSTD_btlazy2 }, /* level 18 */
{ 0, 14, 15, 15, 14, 4, 4, ZSTD_btlazy2 }, /* level 19 */
{ 0, 14, 15, 15, 15, 4, 4, ZSTD_btlazy2 }, /* level 20 */
{ 0, 14, 15, 15, 12, 4, 4, ZSTD_btlazy2 }, /* level ??? */
},
};

21
lib/zstd_opt.h
View File

@ -446,6 +446,7 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
/* init */
ZSTD_resetSeqStore(seqStorePtr);
ZSTD_resetFreqs(seqStorePtr);
if ((ip-base) < REPCODE_STARTVALUE) ip = base + REPCODE_STARTVALUE;
/* Match Loop */
@ -514,13 +515,9 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
mlen++;
} }
if (last_pos < MINMATCH) {
// ip += ((ip-anchor) >> g_searchStrength) + 1; /* jump faster over incompressible sections */
ip++; continue;
}
if (last_pos < MINMATCH) { ip++; continue; }
// check further positions
/* check further positions */
for (skip_num = 0, cur = 1; cur <= last_pos; cur++) {
size_t cur_rep;
inr = ip + cur;
@ -607,7 +604,7 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
ZSTD_LOG_PARSER("%d: Found REP mlen=%d off=%d price=%d litlen=%d price[%d]=%d\n", (int)(inr-base), mlen, 0, price, litlen, cur - litlen, opt[cur - litlen].price);
do {
if (cur + mlen > last_pos || price <= opt[cur + mlen].price) // || ((price == opt[cur + mlen].price) && (opt[cur].mlen == 1) && (cur != litlen))) // at equal price prefer REP instead of MATCH
if (cur + mlen > last_pos || price <= opt[cur + mlen].price)
SET_PRICE(cur + mlen, mlen, 0, litlen, price);
mlen--;
} while (mlen >= MINMATCH);
@ -665,7 +662,7 @@ void ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
// printf("%d: start=%d best_mlen=%d best_off=%d cur=%d\n", (int)(ip - base), (int)(start - ip), (int)best_mlen, (int)best_off, cur);
/* store sequence */
_storeSequence: // cur, last_pos, best_mlen, best_off have to be set
_storeSequence: /* cur, last_pos, best_mlen, best_off have to be set */
for (u = 1; u <= last_pos; u++)
ZSTD_LOG_PARSER("%d: price[%d/%d]=%d off=%d mlen=%d litlen=%d rep=%d rep2=%d\n", (int)(ip-base+u), u, last_pos, opt[u].price, opt[u].off, opt[u].mlen, opt[u].litlen, opt[u].rep, opt[u].rep2);
ZSTD_LOG_PARSER("%d: cur=%d/%d best_mlen=%d best_off=%d rep=%d\n", (int)(ip-base+cur), (int)cur, (int)last_pos, (int)best_mlen, (int)best_off, opt[cur].rep);
@ -681,8 +678,7 @@ _storeSequence: // cur, last_pos, best_mlen, best_off have to be set
opt[cur].off = best_off;
best_mlen = mlen;
best_off = offset;
if (mlen > cur)
break;
if (mlen > cur) break;
cur -= mlen;
}
@ -736,7 +732,7 @@ _storeSequence: // cur, last_pos, best_mlen, best_off have to be set
ZSTD_updatePrice(seqStorePtr, litLength, anchor, offset, mlen-MINMATCH);
ZSTD_storeSeq(seqStorePtr, litLength, anchor, offset, mlen-MINMATCH);
anchor = ip = ip + mlen;
}
} /* for (cur=0; cur < last_pos; ) */
/* check immediate repcode */
while ( (anchor <= ilimit)
@ -751,7 +747,7 @@ _storeSequence: // cur, last_pos, best_mlen, best_off have to be set
ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, best_mlen);
anchor += best_mlen+MINMATCH;
ip = anchor;
continue; // faster when present ... (?)
continue; /* faster when present ... (?) */
} }
{ /* Last Literals */
@ -798,6 +794,7 @@ void ZSTD_compressBlock_opt_extDict_generic(ZSTD_CCtx* ctx,
/* init */
ZSTD_resetSeqStore(seqStorePtr);
ZSTD_resetFreqs(seqStorePtr);
if ((ip - prefixStart) < REPCODE_STARTVALUE) ip += REPCODE_STARTVALUE;
/* Match Loop */

4
lib/zstd_static.h
View File

@ -71,12 +71,12 @@ typedef enum { ZSTD_fast, ZSTD_greedy, ZSTD_lazy, ZSTD_lazy2, ZSTD_btlazy2, ZSTD
typedef struct
{
U64 srcSize; /* optional : tells how much bytes are present in the frame. Use 0 if not known. */
U32 targetLength; /* acceptable match size for optimal parser (only) : larger == more compression, slower */
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 hashLog; /* dispatch table : larger == faster, more memory */
U32 searchLog; /* nb of searches : larger == more compression, slower */
U32 searchLength; /* size of matches : larger == faster decompression, sometimes less compression */
U32 searchLength; /* match length searched : larger == faster decompression, sometimes less compression */
U32 targetLength; /* acceptable match size for optimal parser (only) : larger == more compression, slower */
ZSTD_strategy strategy;
} ZSTD_parameters;

2
programs/paramgrill.c
View File

@ -433,7 +433,7 @@ static void BMK_printWinners2(FILE* f, const winnerInfo_t* winners, size_t srcSi
unsigned cLevel;
fprintf(f, "\n /* Proposed configurations : */ \n");
fprintf(f, " /* l, W, C, H, S, L, strat */ \n");
fprintf(f, " /* l, W, C, H, S, L, T, strat */ \n");
for (cLevel=0; cLevel <= ZSTD_maxCLevel(); cLevel++)
BMK_printWinner(f, cLevel, winners[cLevel].result, winners[cLevel].params, srcSize);