mercurial-scm/hg: contrib/python-zstandard/zstd/compress/zstd

annotate contrib/python-zstandard/zstd/compress/zstd_opt.c @ 42070:675775c33ab6

zstandard: vendor python-zstandard 0.11 The upstream source distribution from PyPI was extracted. Unwanted files were removed. The clang-format ignore list was updated to reflect the new source of files. The project contains a vendored copy of zstandard 1.3.8. The old version was 1.3.6. This should result in some minor performance wins. test-check-py3-compat.t was updated to reflect now-passing tests on Python 3.8. Some HTTP tests were updated to reflect new zstd compression output. # no-check-commit because 3rd party code has different style guidelines Differential Revision: https://phab.mercurial-scm.org/D6199

author	Gregory Szorc <gregory.szorc@gmail.com>
date	Thu, 04 Apr 2019 17:34:43 -0700
parents	73fef626dae3
children	69de49c4e39c

rev	line source
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1 /*
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2 * Copyright (c) 2016-present, Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3 * All rights reserved.
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	4 *
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	5 * This source code is licensed under both the BSD-style license (found in the
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	7 * in the COPYING file in the root directory of this source tree).
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	8 * You may select, at your option, one of the above-listed licenses.
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	9 */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	10
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	11 #include "zstd_compress_internal.h"
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	12 #include "hist.h"
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	13 #include "zstd_opt.h"
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	14
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	15
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	16 #define ZSTD_LITFREQ_ADD 2 /* scaling factor for litFreq, so that frequencies adapt faster to new stats */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	17 #define ZSTD_FREQ_DIV 4 /* log factor when using previous stats to init next stats */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	18 #define ZSTD_MAX_PRICE (1<<30)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	19
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	20 #define ZSTD_PREDEF_THRESHOLD 1024 /* if srcSize < ZSTD_PREDEF_THRESHOLD, symbols' cost is assumed static, directly determined by pre-defined distributions */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	21
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	22
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	23 /-************************************
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	24 * Price functions for optimal parser
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	25 ***************************************/
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	26
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	27 #if 0 /* approximation at bit level */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	28 # define BITCOST_ACCURACY 0
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	29 # define BITCOST_MULTIPLIER (1 << BITCOST_ACCURACY)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	30 # define WEIGHT(stat) ((void)opt, ZSTD_bitWeight(stat))
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	31 #elif 0 /* fractional bit accuracy */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	32 # define BITCOST_ACCURACY 8
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	33 # define BITCOST_MULTIPLIER (1 << BITCOST_ACCURACY)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	34 # define WEIGHT(stat,opt) ((void)opt, ZSTD_fracWeight(stat))
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	35 #else /* opt==approx, ultra==accurate */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	36 # define BITCOST_ACCURACY 8
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	37 # define BITCOST_MULTIPLIER (1 << BITCOST_ACCURACY)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	38 # define WEIGHT(stat,opt) (opt ? ZSTD_fracWeight(stat) : ZSTD_bitWeight(stat))
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	39 #endif
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	40
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	41 MEM_STATIC U32 ZSTD_bitWeight(U32 stat)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	42 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	43 return (ZSTD_highbit32(stat+1) * BITCOST_MULTIPLIER);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	44 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	45
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	46 MEM_STATIC U32 ZSTD_fracWeight(U32 rawStat)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	47 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	48 U32 const stat = rawStat + 1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	49 U32 const hb = ZSTD_highbit32(stat);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	50 U32 const BWeight = hb * BITCOST_MULTIPLIER;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	51 U32 const FWeight = (stat << BITCOST_ACCURACY) >> hb;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	52 U32 const weight = BWeight + FWeight;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	53 assert(hb + BITCOST_ACCURACY < 31);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	54 return weight;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	55 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	56
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	57 #if (DEBUGLEVEL>=2)
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	58 /* debugging function,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	59 * @return price in bytes as fractional value
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	60 * for debug messages only */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	61 MEM_STATIC double ZSTD_fCost(U32 price)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	62 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	63 return (double)price / (BITCOST_MULTIPLIER*8);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	64 }
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	65 #endif
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	66
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	67 static void ZSTD_setBasePrices(optState_t* optPtr, int optLevel)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	68 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	69 optPtr->litSumBasePrice = WEIGHT(optPtr->litSum, optLevel);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	70 optPtr->litLengthSumBasePrice = WEIGHT(optPtr->litLengthSum, optLevel);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	71 optPtr->matchLengthSumBasePrice = WEIGHT(optPtr->matchLengthSum, optLevel);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	72 optPtr->offCodeSumBasePrice = WEIGHT(optPtr->offCodeSum, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	73 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	74
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	75
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	76 /* ZSTD_downscaleStat() :
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	77 * reduce all elements in table by a factor 2^(ZSTD_FREQ_DIV+malus)
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	78 * return the resulting sum of elements */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	79 static U32 ZSTD_downscaleStat(unsigned* table, U32 lastEltIndex, int malus)
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	80 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	81 U32 s, sum=0;
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	82 DEBUGLOG(5, "ZSTD_downscaleStat (nbElts=%u)", (unsigned)lastEltIndex+1);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	83 assert(ZSTD_FREQ_DIV+malus > 0 && ZSTD_FREQ_DIV+malus < 31);
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	84 for (s=0; s<lastEltIndex+1; s++) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	85 table[s] = 1 + (table[s] >> (ZSTD_FREQ_DIV+malus));
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	86 sum += table[s];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	87 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	88 return sum;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	89 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	90
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	91 /* ZSTD_rescaleFreqs() :
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	92 * if first block (detected by optPtr->litLengthSum == 0) : init statistics
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	93 * take hints from dictionary if there is one
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	94 * or init from zero, using src for literals stats, or flat 1 for match symbols
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	95 * otherwise downscale existing stats, to be used as seed for next block.
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	96 */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	97 static void
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	98 ZSTD_rescaleFreqs(optState_t* const optPtr,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	99 const BYTE* const src, size_t const srcSize,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	100 int const optLevel)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	101 {
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	102 DEBUGLOG(5, "ZSTD_rescaleFreqs (srcSize=%u)", (unsigned)srcSize);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	103 optPtr->priceType = zop_dynamic;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	104
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	105 if (optPtr->litLengthSum == 0) { /* first block : init */
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	106 if (srcSize <= ZSTD_PREDEF_THRESHOLD) { /* heuristic */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	107 DEBUGLOG(5, "(srcSize <= ZSTD_PREDEF_THRESHOLD) => zop_predef");
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	108 optPtr->priceType = zop_predef;
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	109 }
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	110
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	111 assert(optPtr->symbolCosts != NULL);
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	112 if (optPtr->symbolCosts->huf.repeatMode == HUF_repeat_valid) {
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	113 /* huffman table presumed generated by dictionary */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	114 optPtr->priceType = zop_dynamic;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	115
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	116 assert(optPtr->litFreq != NULL);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	117 optPtr->litSum = 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	118 { unsigned lit;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	119 for (lit=0; lit<=MaxLit; lit++) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	120 U32 const scaleLog = 11; /* scale to 2K */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	121 U32 const bitCost = HUF_getNbBits(optPtr->symbolCosts->huf.CTable, lit);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	122 assert(bitCost <= scaleLog);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	123 optPtr->litFreq[lit] = bitCost ? 1 << (scaleLog-bitCost) : 1 /minimum to calculate cost/;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	124 optPtr->litSum += optPtr->litFreq[lit];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	125 } }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	126
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	127 { unsigned ll;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	128 FSE_CState_t llstate;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	129 FSE_initCState(&llstate, optPtr->symbolCosts->fse.litlengthCTable);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	130 optPtr->litLengthSum = 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	131 for (ll=0; ll<=MaxLL; ll++) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	132 U32 const scaleLog = 10; /* scale to 1K */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	133 U32 const bitCost = FSE_getMaxNbBits(llstate.symbolTT, ll);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	134 assert(bitCost < scaleLog);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	135 optPtr->litLengthFreq[ll] = bitCost ? 1 << (scaleLog-bitCost) : 1 /minimum to calculate cost/;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	136 optPtr->litLengthSum += optPtr->litLengthFreq[ll];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	137 } }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	138
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	139 { unsigned ml;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	140 FSE_CState_t mlstate;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	141 FSE_initCState(&mlstate, optPtr->symbolCosts->fse.matchlengthCTable);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	142 optPtr->matchLengthSum = 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	143 for (ml=0; ml<=MaxML; ml++) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	144 U32 const scaleLog = 10;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	145 U32 const bitCost = FSE_getMaxNbBits(mlstate.symbolTT, ml);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	146 assert(bitCost < scaleLog);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	147 optPtr->matchLengthFreq[ml] = bitCost ? 1 << (scaleLog-bitCost) : 1 /minimum to calculate cost/;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	148 optPtr->matchLengthSum += optPtr->matchLengthFreq[ml];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	149 } }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	150
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	151 { unsigned of;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	152 FSE_CState_t ofstate;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	153 FSE_initCState(&ofstate, optPtr->symbolCosts->fse.offcodeCTable);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	154 optPtr->offCodeSum = 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	155 for (of=0; of<=MaxOff; of++) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	156 U32 const scaleLog = 10;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	157 U32 const bitCost = FSE_getMaxNbBits(ofstate.symbolTT, of);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	158 assert(bitCost < scaleLog);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	159 optPtr->offCodeFreq[of] = bitCost ? 1 << (scaleLog-bitCost) : 1 /minimum to calculate cost/;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	160 optPtr->offCodeSum += optPtr->offCodeFreq[of];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	161 } }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	162
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	163 } else { /* not a dictionary */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	164
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	165 assert(optPtr->litFreq != NULL);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	166 { unsigned lit = MaxLit;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	167 HIST_count_simple(optPtr->litFreq, &lit, src, srcSize); /* use raw first block to init statistics */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	168 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	169 optPtr->litSum = ZSTD_downscaleStat(optPtr->litFreq, MaxLit, 1);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	170
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	171 { unsigned ll;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	172 for (ll=0; ll<=MaxLL; ll++)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	173 optPtr->litLengthFreq[ll] = 1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	174 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	175 optPtr->litLengthSum = MaxLL+1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	176
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	177 { unsigned ml;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	178 for (ml=0; ml<=MaxML; ml++)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	179 optPtr->matchLengthFreq[ml] = 1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	180 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	181 optPtr->matchLengthSum = MaxML+1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	182
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	183 { unsigned of;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	184 for (of=0; of<=MaxOff; of++)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	185 optPtr->offCodeFreq[of] = 1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	186 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	187 optPtr->offCodeSum = MaxOff+1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	188
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	189 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	190
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	191 } else { /* new block : re-use previous statistics, scaled down */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	192
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	193 optPtr->litSum = ZSTD_downscaleStat(optPtr->litFreq, MaxLit, 1);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	194 optPtr->litLengthSum = ZSTD_downscaleStat(optPtr->litLengthFreq, MaxLL, 0);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	195 optPtr->matchLengthSum = ZSTD_downscaleStat(optPtr->matchLengthFreq, MaxML, 0);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	196 optPtr->offCodeSum = ZSTD_downscaleStat(optPtr->offCodeFreq, MaxOff, 0);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	197 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	198
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	199 ZSTD_setBasePrices(optPtr, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	200 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	201
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	202 /* ZSTD_rawLiteralsCost() :
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	203 * price of literals (only) in specified segment (which length can be 0).
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	204 * does not include price of literalLength symbol */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	205 static U32 ZSTD_rawLiteralsCost(const BYTE* const literals, U32 const litLength,
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	206 const optState_t* const optPtr,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	207 int optLevel)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	208 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	209 if (litLength == 0) return 0;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	210 if (optPtr->priceType == zop_predef)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	211 return (litLength6) BITCOST_MULTIPLIER; /* 6 bit per literal - no statistic used */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	212
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	213 /* dynamic statistics */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	214 { U32 price = litLength * optPtr->litSumBasePrice;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	215 U32 u;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	216 for (u=0; u < litLength; u++) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	217 assert(WEIGHT(optPtr->litFreq[literals[u]], optLevel) <= optPtr->litSumBasePrice); /* literal cost should never be negative */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	218 price -= WEIGHT(optPtr->litFreq[literals[u]], optLevel);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	219 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	220 return price;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	221 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	222 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	223
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	224 /* ZSTD_litLengthPrice() :
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	225 * cost of literalLength symbol */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	226 static U32 ZSTD_litLengthPrice(U32 const litLength, const optState_t* const optPtr, int optLevel)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	227 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	228 if (optPtr->priceType == zop_predef) return WEIGHT(litLength, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	229
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	230 /* dynamic statistics */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	231 { U32 const llCode = ZSTD_LLcode(litLength);
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	232 return (LL_bits[llCode] * BITCOST_MULTIPLIER)
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	233 + optPtr->litLengthSumBasePrice
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	234 - WEIGHT(optPtr->litLengthFreq[llCode], optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	235 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	236 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	237
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	238 /* ZSTD_litLengthContribution() :
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	239 * @return ( cost(litlength) - cost(0) )
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	240 * this value can then be added to rawLiteralsCost()
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	241 * to provide a cost which is directly comparable to a match ending at same position */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	242 static int ZSTD_litLengthContribution(U32 const litLength, const optState_t* const optPtr, int optLevel)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	243 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	244 if (optPtr->priceType >= zop_predef) return WEIGHT(litLength, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	245
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	246 /* dynamic statistics */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	247 { U32 const llCode = ZSTD_LLcode(litLength);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	248 int const contribution = (LL_bits[llCode] * BITCOST_MULTIPLIER)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	249 + WEIGHT(optPtr->litLengthFreq[0], optLevel) /* note: log2litLengthSum cancel out */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	250 - WEIGHT(optPtr->litLengthFreq[llCode], optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	251 #if 1
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	252 return contribution;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	253 #else
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	254 return MAX(0, contribution); /* sometimes better, sometimes not ... */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	255 #endif
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	256 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	257 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	258
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	259 /* ZSTD_literalsContribution() :
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	260 * creates a fake cost for the literals part of a sequence
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	261 * which can be compared to the ending cost of a match
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	262 * should a new match start at this position */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	263 static int ZSTD_literalsContribution(const BYTE* const literals, U32 const litLength,
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	264 const optState_t* const optPtr,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	265 int optLevel)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	266 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	267 int const contribution = ZSTD_rawLiteralsCost(literals, litLength, optPtr, optLevel)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	268 + ZSTD_litLengthContribution(litLength, optPtr, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	269 return contribution;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	270 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	271
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	272 /* ZSTD_getMatchPrice() :
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	273 * Provides the cost of the match part (offset + matchLength) of a sequence
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	274 * Must be combined with ZSTD_fullLiteralsCost() to get the full cost of a sequence.
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	275 * optLevel: when <2, favors small offset for decompression speed (improved cache efficiency) */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	276 FORCE_INLINE_TEMPLATE U32
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	277 ZSTD_getMatchPrice(U32 const offset,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	278 U32 const matchLength,
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	279 const optState_t* const optPtr,
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	280 int const optLevel)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	281 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	282 U32 price;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	283 U32 const offCode = ZSTD_highbit32(offset+1);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	284 U32 const mlBase = matchLength - MINMATCH;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	285 assert(matchLength >= MINMATCH);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	286
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	287 if (optPtr->priceType == zop_predef) /* fixed scheme, do not use statistics */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	288 return WEIGHT(mlBase, optLevel) + ((16 + offCode) * BITCOST_MULTIPLIER);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	289
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	290 /* dynamic statistics */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	291 price = (offCode * BITCOST_MULTIPLIER) + (optPtr->offCodeSumBasePrice - WEIGHT(optPtr->offCodeFreq[offCode], optLevel));
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	292 if ((optLevel<2) /static/ && offCode >= 20)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	293 price += (offCode-19)2 BITCOST_MULTIPLIER; /* handicap for long distance offsets, favor decompression speed */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	294
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	295 /* match Length */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	296 { U32 const mlCode = ZSTD_MLcode(mlBase);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	297 price += (ML_bits[mlCode] * BITCOST_MULTIPLIER) + (optPtr->matchLengthSumBasePrice - WEIGHT(optPtr->matchLengthFreq[mlCode], optLevel));
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	298 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	299
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	300 price += BITCOST_MULTIPLIER / 5; /* heuristic : make matches a bit more costly to favor less sequences -> faster decompression speed */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	301
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	302 DEBUGLOG(8, "ZSTD_getMatchPrice(ml:%u) = %u", matchLength, price);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	303 return price;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	304 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	305
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	306 /* ZSTD_updateStats() :
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	307 * assumption : literals + litLengtn <= iend */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	308 static void ZSTD_updateStats(optState_t* const optPtr,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	309 U32 litLength, const BYTE* literals,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	310 U32 offsetCode, U32 matchLength)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	311 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	312 /* literals */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	313 { U32 u;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	314 for (u=0; u < litLength; u++)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	315 optPtr->litFreq[literals[u]] += ZSTD_LITFREQ_ADD;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	316 optPtr->litSum += litLength*ZSTD_LITFREQ_ADD;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	317 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	318
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	319 /* literal Length */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	320 { U32 const llCode = ZSTD_LLcode(litLength);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	321 optPtr->litLengthFreq[llCode]++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	322 optPtr->litLengthSum++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	323 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	324
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	325 /* match offset code (0-2=>repCode; 3+=>offset+2) */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	326 { U32 const offCode = ZSTD_highbit32(offsetCode+1);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	327 assert(offCode <= MaxOff);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	328 optPtr->offCodeFreq[offCode]++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	329 optPtr->offCodeSum++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	330 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	331
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	332 /* match Length */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	333 { U32 const mlBase = matchLength - MINMATCH;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	334 U32 const mlCode = ZSTD_MLcode(mlBase);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	335 optPtr->matchLengthFreq[mlCode]++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	336 optPtr->matchLengthSum++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	337 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	338 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	339
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	340
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	341 /* ZSTD_readMINMATCH() :
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	342 * function safe only for comparisons
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	343 * assumption : memPtr must be at least 4 bytes before end of buffer */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	344 MEM_STATIC U32 ZSTD_readMINMATCH(const void* memPtr, U32 length)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	345 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	346 switch (length)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	347 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	348 default :
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	349 case 4 : return MEM_read32(memPtr);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	350 case 3 : if (MEM_isLittleEndian())
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	351 return MEM_read32(memPtr)<<8;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	352 else
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	353 return MEM_read32(memPtr)>>8;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	354 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	355 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	356
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	357
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	358 /* Update hashTable3 up to ip (excluded)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	359 Assumption : always within prefix (i.e. not within extDict) */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	360 static U32 ZSTD_insertAndFindFirstIndexHash3 (ZSTD_matchState_t* ms, const BYTE* const ip)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	361 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	362 U32* const hashTable3 = ms->hashTable3;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	363 U32 const hashLog3 = ms->hashLog3;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	364 const BYTE* const base = ms->window.base;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	365 U32 idx = ms->nextToUpdate3;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	366 U32 const target = ms->nextToUpdate3 = (U32)(ip - base);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	367 size_t const hash3 = ZSTD_hash3Ptr(ip, hashLog3);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	368 assert(hashLog3 > 0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	369
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	370 while(idx < target) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	371 hashTable3[ZSTD_hash3Ptr(base+idx, hashLog3)] = idx;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	372 idx++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	373 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	374
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	375 return hashTable3[hash3];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	376 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	377
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	378
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	379 /-************************************
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	380 * Binary Tree search
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	381 ***************************************/
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	382 /** ZSTD_insertBt1() : add one or multiple positions to tree.
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	383 * ip : assumed <= iend-8 .
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	384 * @return : nb of positions added */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	385 static U32 ZSTD_insertBt1(
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	386 ZSTD_matchState_t* ms,
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	387 const BYTE* const ip, const BYTE* const iend,
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	388 U32 const mls, const int extDict)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	389 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	390 const ZSTD_compressionParameters* const cParams = &ms->cParams;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	391 U32* const hashTable = ms->hashTable;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	392 U32 const hashLog = cParams->hashLog;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	393 size_t const h = ZSTD_hashPtr(ip, hashLog, mls);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	394 U32* const bt = ms->chainTable;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	395 U32 const btLog = cParams->chainLog - 1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	396 U32 const btMask = (1 << btLog) - 1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	397 U32 matchIndex = hashTable[h];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	398 size_t commonLengthSmaller=0, commonLengthLarger=0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	399 const BYTE* const base = ms->window.base;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	400 const BYTE* const dictBase = ms->window.dictBase;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	401 const U32 dictLimit = ms->window.dictLimit;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	402 const BYTE* const dictEnd = dictBase + dictLimit;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	403 const BYTE* const prefixStart = base + dictLimit;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	404 const BYTE* match;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	405 const U32 current = (U32)(ip-base);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	406 const U32 btLow = btMask >= current ? 0 : current - btMask;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	407 U32* smallerPtr = bt + 2*(current&btMask);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	408 U32* largerPtr = smallerPtr + 1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	409 U32 dummy32; /* to be nullified at the end */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	410 U32 const windowLow = ms->window.lowLimit;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	411 U32 matchEndIdx = current+8+1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	412 size_t bestLength = 8;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	413 U32 nbCompares = 1U << cParams->searchLog;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	414 #ifdef ZSTD_C_PREDICT
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	415 U32 predictedSmall = (bt + 2((current-1)&btMask) + 0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	416 U32 predictedLarge = (bt + 2((current-1)&btMask) + 1);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	417 predictedSmall += (predictedSmall>0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	418 predictedLarge += (predictedLarge>0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	419 #endif /* ZSTD_C_PREDICT */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	420
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	421 DEBUGLOG(8, "ZSTD_insertBt1 (%u)", current);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	422
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	423 assert(ip <= iend-8); /* required for h calculation */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	424 hashTable[h] = current; /* Update Hash Table */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	425
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	426 assert(windowLow > 0);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	427 while (nbCompares-- && (matchIndex >= windowLow)) {
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	428 U32* const nextPtr = bt + 2*(matchIndex & btMask);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	429 size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	430 assert(matchIndex < current);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	431
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	432 #ifdef ZSTD_C_PREDICT /* note : can create issues when hlog small <= 11 */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	433 const U32* predictPtr = bt + 2((matchIndex-1) & btMask); / written this way, as bt is a roll buffer */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	434 if (matchIndex == predictedSmall) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	435 /* no need to check length, result known */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	436 *smallerPtr = matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	437 if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	438 smallerPtr = nextPtr+1; /* new "smaller" => larger of match */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	439 matchIndex = nextPtr[1]; /* new matchIndex larger than previous (closer to current) */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	440 predictedSmall = predictPtr[1] + (predictPtr[1]>0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	441 continue;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	442 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	443 if (matchIndex == predictedLarge) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	444 *largerPtr = matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	445 if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	446 largerPtr = nextPtr;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	447 matchIndex = nextPtr[0];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	448 predictedLarge = predictPtr[0] + (predictPtr[0]>0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	449 continue;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	450 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	451 #endif
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	452
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	453 if (!extDict \|\| (matchIndex+matchLength >= dictLimit)) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	454 assert(matchIndex+matchLength >= dictLimit); /* might be wrong if actually extDict */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	455 match = base + matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	456 matchLength += ZSTD_count(ip+matchLength, match+matchLength, iend);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	457 } else {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	458 match = dictBase + matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	459 matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	460 if (matchIndex+matchLength >= dictLimit)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	461 match = base + matchIndex; /* to prepare for next usage of match[matchLength] */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	462 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	463
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	464 if (matchLength > bestLength) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	465 bestLength = matchLength;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	466 if (matchLength > matchEndIdx - matchIndex)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	467 matchEndIdx = matchIndex + (U32)matchLength;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	468 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	469
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	470 if (ip+matchLength == iend) { /* equal : no way to know if inf or sup */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	471 break; /* drop , to guarantee consistency ; miss a bit of compression, but other solutions can corrupt tree */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	472 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	473
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	474 if (match[matchLength] < ip[matchLength]) { /* necessarily within buffer */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	475 /* match is smaller than current */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	476 smallerPtr = matchIndex; / update smaller idx */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	477 commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	478 if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop searching */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	479 smallerPtr = nextPtr+1; /* new "candidate" => larger than match, which was smaller than target */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	480 matchIndex = nextPtr[1]; /* new matchIndex, larger than previous and closer to current */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	481 } else {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	482 /* match is larger than current */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	483 *largerPtr = matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	484 commonLengthLarger = matchLength;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	485 if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop searching */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	486 largerPtr = nextPtr;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	487 matchIndex = nextPtr[0];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	488 } }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	489
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	490 smallerPtr = largerPtr = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	491 if (bestLength > 384) return MIN(192, (U32)(bestLength - 384)); /* speed optimization */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	492 assert(matchEndIdx > current + 8);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	493 return matchEndIdx - (current + 8);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	494 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	495
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	496 FORCE_INLINE_TEMPLATE
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	497 void ZSTD_updateTree_internal(
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	498 ZSTD_matchState_t* ms,
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	499 const BYTE* const ip, const BYTE* const iend,
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	500 const U32 mls, const ZSTD_dictMode_e dictMode)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	501 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	502 const BYTE* const base = ms->window.base;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	503 U32 const target = (U32)(ip - base);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	504 U32 idx = ms->nextToUpdate;
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	505 DEBUGLOG(6, "ZSTD_updateTree_internal, from %u to %u (dictMode:%u)",
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	506 idx, target, dictMode);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	507
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	508 while(idx < target)
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	509 idx += ZSTD_insertBt1(ms, base+idx, iend, mls, dictMode == ZSTD_extDict);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	510 ms->nextToUpdate = target;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	511 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	512
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	513 void ZSTD_updateTree(ZSTD_matchState_t* ms, const BYTE* ip, const BYTE* iend) {
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	514 ZSTD_updateTree_internal(ms, ip, iend, ms->cParams.minMatch, ZSTD_noDict);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	515 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	516
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	517 FORCE_INLINE_TEMPLATE
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	518 U32 ZSTD_insertBtAndGetAllMatches (
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	519 ZSTD_matchState_t* ms,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	520 const BYTE* const ip, const BYTE* const iLimit, const ZSTD_dictMode_e dictMode,
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	521 U32 rep[ZSTD_REP_NUM],
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	522 U32 const ll0, /* tells if associated literal length is 0 or not. This value must be 0 or 1 */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	523 ZSTD_match_t* matches,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	524 const U32 lengthToBeat,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	525 U32 const mls /* template */)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	526 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	527 const ZSTD_compressionParameters* const cParams = &ms->cParams;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	528 U32 const sufficient_len = MIN(cParams->targetLength, ZSTD_OPT_NUM -1);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	529 const BYTE* const base = ms->window.base;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	530 U32 const current = (U32)(ip-base);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	531 U32 const hashLog = cParams->hashLog;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	532 U32 const minMatch = (mls==3) ? 3 : 4;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	533 U32* const hashTable = ms->hashTable;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	534 size_t const h = ZSTD_hashPtr(ip, hashLog, mls);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	535 U32 matchIndex = hashTable[h];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	536 U32* const bt = ms->chainTable;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	537 U32 const btLog = cParams->chainLog - 1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	538 U32 const btMask= (1U << btLog) - 1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	539 size_t commonLengthSmaller=0, commonLengthLarger=0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	540 const BYTE* const dictBase = ms->window.dictBase;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	541 U32 const dictLimit = ms->window.dictLimit;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	542 const BYTE* const dictEnd = dictBase + dictLimit;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	543 const BYTE* const prefixStart = base + dictLimit;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	544 U32 const btLow = btMask >= current ? 0 : current - btMask;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	545 U32 const windowLow = ms->window.lowLimit;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	546 U32 const matchLow = windowLow ? windowLow : 1;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	547 U32* smallerPtr = bt + 2*(current&btMask);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	548 U32* largerPtr = bt + 2*(current&btMask) + 1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	549 U32 matchEndIdx = current+8+1; /* farthest referenced position of any match => detects repetitive patterns */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	550 U32 dummy32; /* to be nullified at the end */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	551 U32 mnum = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	552 U32 nbCompares = 1U << cParams->searchLog;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	553
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	554 const ZSTD_matchState_t* dms = dictMode == ZSTD_dictMatchState ? ms->dictMatchState : NULL;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	555 const ZSTD_compressionParameters* const dmsCParams =
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	556 dictMode == ZSTD_dictMatchState ? &dms->cParams : NULL;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	557 const BYTE* const dmsBase = dictMode == ZSTD_dictMatchState ? dms->window.base : NULL;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	558 const BYTE* const dmsEnd = dictMode == ZSTD_dictMatchState ? dms->window.nextSrc : NULL;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	559 U32 const dmsHighLimit = dictMode == ZSTD_dictMatchState ? (U32)(dmsEnd - dmsBase) : 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	560 U32 const dmsLowLimit = dictMode == ZSTD_dictMatchState ? dms->window.lowLimit : 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	561 U32 const dmsIndexDelta = dictMode == ZSTD_dictMatchState ? windowLow - dmsHighLimit : 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	562 U32 const dmsHashLog = dictMode == ZSTD_dictMatchState ? dmsCParams->hashLog : hashLog;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	563 U32 const dmsBtLog = dictMode == ZSTD_dictMatchState ? dmsCParams->chainLog - 1 : btLog;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	564 U32 const dmsBtMask = dictMode == ZSTD_dictMatchState ? (1U << dmsBtLog) - 1 : 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	565 U32 const dmsBtLow = dictMode == ZSTD_dictMatchState && dmsBtMask < dmsHighLimit - dmsLowLimit ? dmsHighLimit - dmsBtMask : dmsLowLimit;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	566
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	567 size_t bestLength = lengthToBeat-1;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	568 DEBUGLOG(8, "ZSTD_insertBtAndGetAllMatches: current=%u", current);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	569
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	570 /* check repCode */
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	571 assert(ll0 <= 1); /* necessarily 1 or 0 */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	572 { U32 const lastR = ZSTD_REP_NUM + ll0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	573 U32 repCode;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	574 for (repCode = ll0; repCode < lastR; repCode++) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	575 U32 const repOffset = (repCode==ZSTD_REP_NUM) ? (rep[0] - 1) : rep[repCode];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	576 U32 const repIndex = current - repOffset;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	577 U32 repLen = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	578 assert(current >= dictLimit);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	579 if (repOffset-1 /* intentional overflow, discards 0 and -1 / < current-dictLimit) { / equivalent to `current > repIndex >= dictLimit` */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	580 if (ZSTD_readMINMATCH(ip, minMatch) == ZSTD_readMINMATCH(ip - repOffset, minMatch)) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	581 repLen = (U32)ZSTD_count(ip+minMatch, ip+minMatch-repOffset, iLimit) + minMatch;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	582 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	583 } else { /* repIndex < dictLimit \|\| repIndex >= current */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	584 const BYTE* const repMatch = dictMode == ZSTD_dictMatchState ?
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	585 dmsBase + repIndex - dmsIndexDelta :
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	586 dictBase + repIndex;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	587 assert(current >= windowLow);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	588 if ( dictMode == ZSTD_extDict
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	589 && ( ((repOffset-1) /intentional overflow/ < current - windowLow) /* equivalent to `current > repIndex >= windowLow` */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	590 & (((U32)((dictLimit-1) - repIndex) >= 3) ) /* intentional overflow : do not test positions overlapping 2 memory segments */)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	591 && (ZSTD_readMINMATCH(ip, minMatch) == ZSTD_readMINMATCH(repMatch, minMatch)) ) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	592 repLen = (U32)ZSTD_count_2segments(ip+minMatch, repMatch+minMatch, iLimit, dictEnd, prefixStart) + minMatch;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	593 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	594 if (dictMode == ZSTD_dictMatchState
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	595 && ( ((repOffset-1) /intentional overflow/ < current - (dmsLowLimit + dmsIndexDelta)) /* equivalent to `current > repIndex >= dmsLowLimit` */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	596 & ((U32)((dictLimit-1) - repIndex) >= 3) ) /* intentional overflow : do not test positions overlapping 2 memory segments */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	597 && (ZSTD_readMINMATCH(ip, minMatch) == ZSTD_readMINMATCH(repMatch, minMatch)) ) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	598 repLen = (U32)ZSTD_count_2segments(ip+minMatch, repMatch+minMatch, iLimit, dmsEnd, prefixStart) + minMatch;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	599 } }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	600 /* save longer solution */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	601 if (repLen > bestLength) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	602 DEBUGLOG(8, "found repCode %u (ll0:%u, offset:%u) of length %u",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	603 repCode, ll0, repOffset, repLen);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	604 bestLength = repLen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	605 matches[mnum].off = repCode - ll0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	606 matches[mnum].len = (U32)repLen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	607 mnum++;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	608 if ( (repLen > sufficient_len)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	609 \| (ip+repLen == iLimit) ) { /* best possible */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	610 return mnum;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	611 } } } }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	612
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	613 /* HC3 match finder */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	614 if ((mls == 3) /static/ && (bestLength < mls)) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	615 U32 const matchIndex3 = ZSTD_insertAndFindFirstIndexHash3(ms, ip);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	616 if ((matchIndex3 >= matchLow)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	617 & (current - matchIndex3 < (1<<18)) /heuristic : longer distance likely too expensive/ ) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	618 size_t mlen;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	619 if ((dictMode == ZSTD_noDict) /static/ \|\| (dictMode == ZSTD_dictMatchState) /static/ \|\| (matchIndex3 >= dictLimit)) {
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	620 const BYTE* const match = base + matchIndex3;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	621 mlen = ZSTD_count(ip, match, iLimit);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	622 } else {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	623 const BYTE* const match = dictBase + matchIndex3;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	624 mlen = ZSTD_count_2segments(ip, match, iLimit, dictEnd, prefixStart);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	625 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	626
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	627 /* save best solution */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	628 if (mlen >= mls /* == 3 > bestLength */) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	629 DEBUGLOG(8, "found small match with hlog3, of length %u",
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	630 (U32)mlen);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	631 bestLength = mlen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	632 assert(current > matchIndex3);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	633 assert(mnum==0); /* no prior solution */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	634 matches[0].off = (current - matchIndex3) + ZSTD_REP_MOVE;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	635 matches[0].len = (U32)mlen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	636 mnum = 1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	637 if ( (mlen > sufficient_len) \|
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	638 (ip+mlen == iLimit) ) { /* best possible length */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	639 ms->nextToUpdate = current+1; /* skip insertion */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	640 return 1;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	641 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	642 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	643 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	644 /* no dictMatchState lookup: dicts don't have a populated HC3 table */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	645 }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	646
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	647 hashTable[h] = current; /* Update Hash Table */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	648
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	649 while (nbCompares-- && (matchIndex >= matchLow)) {
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	650 U32* const nextPtr = bt + 2*(matchIndex & btMask);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	651 size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	652 const BYTE* match;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	653 assert(current > matchIndex);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	654
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	655 if ((dictMode == ZSTD_noDict) \|\| (dictMode == ZSTD_dictMatchState) \|\| (matchIndex+matchLength >= dictLimit)) {
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	656 assert(matchIndex+matchLength >= dictLimit); /* ensure the condition is correct when !extDict */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	657 match = base + matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	658 matchLength += ZSTD_count(ip+matchLength, match+matchLength, iLimit);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	659 } else {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	660 match = dictBase + matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	661 matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iLimit, dictEnd, prefixStart);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	662 if (matchIndex+matchLength >= dictLimit)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	663 match = base + matchIndex; /* prepare for match[matchLength] */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	664 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	665
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	666 if (matchLength > bestLength) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	667 DEBUGLOG(8, "found match of length %u at distance %u (offCode=%u)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	668 (U32)matchLength, current - matchIndex, current - matchIndex + ZSTD_REP_MOVE);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	669 assert(matchEndIdx > matchIndex);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	670 if (matchLength > matchEndIdx - matchIndex)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	671 matchEndIdx = matchIndex + (U32)matchLength;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	672 bestLength = matchLength;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	673 matches[mnum].off = (current - matchIndex) + ZSTD_REP_MOVE;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	674 matches[mnum].len = (U32)matchLength;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	675 mnum++;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	676 if ( (matchLength > ZSTD_OPT_NUM)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	677 \| (ip+matchLength == iLimit) /* equal : no way to know if inf or sup */) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	678 if (dictMode == ZSTD_dictMatchState) nbCompares = 0; /* break should also skip searching dms */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	679 break; /* drop, to preserve bt consistency (miss a little bit of compression) */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	680 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	681 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	682
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	683 if (match[matchLength] < ip[matchLength]) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	684 /* match smaller than current */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	685 smallerPtr = matchIndex; / update smaller idx */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	686 commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	687 if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	688 smallerPtr = nextPtr+1; /* new candidate => larger than match, which was smaller than current */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	689 matchIndex = nextPtr[1]; /* new matchIndex, larger than previous, closer to current */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	690 } else {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	691 *largerPtr = matchIndex;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	692 commonLengthLarger = matchLength;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	693 if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	694 largerPtr = nextPtr;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	695 matchIndex = nextPtr[0];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	696 } }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	697
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	698 smallerPtr = largerPtr = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	699
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	700 if (dictMode == ZSTD_dictMatchState && nbCompares) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	701 size_t const dmsH = ZSTD_hashPtr(ip, dmsHashLog, mls);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	702 U32 dictMatchIndex = dms->hashTable[dmsH];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	703 const U32* const dmsBt = dms->chainTable;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	704 commonLengthSmaller = commonLengthLarger = 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	705 while (nbCompares-- && (dictMatchIndex > dmsLowLimit)) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	706 const U32* const nextPtr = dmsBt + 2*(dictMatchIndex & dmsBtMask);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	707 size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	708 const BYTE* match = dmsBase + dictMatchIndex;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	709 matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iLimit, dmsEnd, prefixStart);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	710 if (dictMatchIndex+matchLength >= dmsHighLimit)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	711 match = base + dictMatchIndex + dmsIndexDelta; /* to prepare for next usage of match[matchLength] */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	712
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	713 if (matchLength > bestLength) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	714 matchIndex = dictMatchIndex + dmsIndexDelta;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	715 DEBUGLOG(8, "found dms match of length %u at distance %u (offCode=%u)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	716 (U32)matchLength, current - matchIndex, current - matchIndex + ZSTD_REP_MOVE);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	717 if (matchLength > matchEndIdx - matchIndex)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	718 matchEndIdx = matchIndex + (U32)matchLength;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	719 bestLength = matchLength;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	720 matches[mnum].off = (current - matchIndex) + ZSTD_REP_MOVE;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	721 matches[mnum].len = (U32)matchLength;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	722 mnum++;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	723 if ( (matchLength > ZSTD_OPT_NUM)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	724 \| (ip+matchLength == iLimit) /* equal : no way to know if inf or sup */) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	725 break; /* drop, to guarantee consistency (miss a little bit of compression) */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	726 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	727 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	728
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	729 if (dictMatchIndex <= dmsBtLow) { break; } /* beyond tree size, stop the search */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	730 if (match[matchLength] < ip[matchLength]) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	731 commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	732 dictMatchIndex = nextPtr[1]; /* new matchIndex larger than previous (closer to current) */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	733 } else {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	734 /* match is larger than current */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	735 commonLengthLarger = matchLength;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	736 dictMatchIndex = nextPtr[0];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	737 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	738 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	739 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	740
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	741 assert(matchEndIdx > current+8);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	742 ms->nextToUpdate = matchEndIdx - 8; /* skip repetitive patterns */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	743 return mnum;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	744 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	745
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	746
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	747 FORCE_INLINE_TEMPLATE U32 ZSTD_BtGetAllMatches (
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	748 ZSTD_matchState_t* ms,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	749 const BYTE* ip, const BYTE* const iHighLimit, const ZSTD_dictMode_e dictMode,
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	750 U32 rep[ZSTD_REP_NUM], U32 const ll0,
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	751 ZSTD_match_t* matches, U32 const lengthToBeat)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	752 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	753 const ZSTD_compressionParameters* const cParams = &ms->cParams;
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	754 U32 const matchLengthSearch = cParams->minMatch;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	755 DEBUGLOG(8, "ZSTD_BtGetAllMatches");
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	756 if (ip < ms->window.base + ms->nextToUpdate) return 0; /* skipped area */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	757 ZSTD_updateTree_internal(ms, ip, iHighLimit, matchLengthSearch, dictMode);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	758 switch(matchLengthSearch)
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	759 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	760 case 3 : return ZSTD_insertBtAndGetAllMatches(ms, ip, iHighLimit, dictMode, rep, ll0, matches, lengthToBeat, 3);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	761 default :
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	762 case 4 : return ZSTD_insertBtAndGetAllMatches(ms, ip, iHighLimit, dictMode, rep, ll0, matches, lengthToBeat, 4);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	763 case 5 : return ZSTD_insertBtAndGetAllMatches(ms, ip, iHighLimit, dictMode, rep, ll0, matches, lengthToBeat, 5);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	764 case 7 :
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	765 case 6 : return ZSTD_insertBtAndGetAllMatches(ms, ip, iHighLimit, dictMode, rep, ll0, matches, lengthToBeat, 6);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	766 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	767 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	768
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	769
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	770 /-******************************
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	771 * Optimal parser
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	772 *********************************/
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	773 typedef struct repcodes_s {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	774 U32 rep[3];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	775 } repcodes_t;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	776
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	777 static repcodes_t ZSTD_updateRep(U32 const rep[3], U32 const offset, U32 const ll0)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	778 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	779 repcodes_t newReps;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	780 if (offset >= ZSTD_REP_NUM) { /* full offset */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	781 newReps.rep[2] = rep[1];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	782 newReps.rep[1] = rep[0];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	783 newReps.rep[0] = offset - ZSTD_REP_MOVE;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	784 } else { /* repcode */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	785 U32 const repCode = offset + ll0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	786 if (repCode > 0) { /* note : if repCode==0, no change */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	787 U32 const currentOffset = (repCode==ZSTD_REP_NUM) ? (rep[0] - 1) : rep[repCode];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	788 newReps.rep[2] = (repCode >= 2) ? rep[1] : rep[2];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	789 newReps.rep[1] = rep[0];
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	790 newReps.rep[0] = currentOffset;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	791 } else { /* repCode == 0 */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	792 memcpy(&newReps, rep, sizeof(newReps));
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	793 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	794 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	795 return newReps;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	796 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	797
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	798
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	799 static U32 ZSTD_totalLen(ZSTD_optimal_t sol)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	800 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	801 return sol.litlen + sol.mlen;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	802 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	803
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	804 #if 0 /* debug */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	805
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	806 static void
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	807 listStats(const U32* table, int lastEltID)
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	808 {
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	809 int const nbElts = lastEltID + 1;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	810 int enb;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	811 for (enb=0; enb < nbElts; enb++) {
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	812 (void)table;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	813 //RAWLOG(2, "%3i:%3i, ", enb, table[enb]);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	814 RAWLOG(2, "%4i,", table[enb]);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	815 }
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	816 RAWLOG(2, " \n");
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	817 }
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	818
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	819 #endif
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	820
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	821 FORCE_INLINE_TEMPLATE size_t
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	822 ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	823 seqStore_t* seqStore,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	824 U32 rep[ZSTD_REP_NUM],
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	825 const void* src, size_t srcSize,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	826 const int optLevel,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	827 const ZSTD_dictMode_e dictMode)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	828 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	829 optState_t* const optStatePtr = &ms->opt;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	830 const BYTE* const istart = (const BYTE*)src;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	831 const BYTE* ip = istart;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	832 const BYTE* anchor = istart;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	833 const BYTE* const iend = istart + srcSize;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	834 const BYTE* const ilimit = iend - 8;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	835 const BYTE* const base = ms->window.base;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	836 const BYTE* const prefixStart = base + ms->window.dictLimit;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	837 const ZSTD_compressionParameters* const cParams = &ms->cParams;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	838
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	839 U32 const sufficient_len = MIN(cParams->targetLength, ZSTD_OPT_NUM -1);
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	840 U32 const minMatch = (cParams->minMatch == 3) ? 3 : 4;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	841
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	842 ZSTD_optimal_t* const opt = optStatePtr->priceTable;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	843 ZSTD_match_t* const matches = optStatePtr->matchTable;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	844 ZSTD_optimal_t lastSequence;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	845
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	846 /* init */
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	847 DEBUGLOG(5, "ZSTD_compressBlock_opt_generic: current=%u, prefix=%u, nextToUpdate=%u",
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	848 (U32)(ip - base), ms->window.dictLimit, ms->nextToUpdate);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	849 assert(optLevel <= 2);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	850 ms->nextToUpdate3 = ms->nextToUpdate;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	851 ZSTD_rescaleFreqs(optStatePtr, (const BYTE*)src, srcSize, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	852 ip += (ip==prefixStart);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	853
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	854 /* Match Loop */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	855 while (ip < ilimit) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	856 U32 cur, last_pos = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	857
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	858 /* find first match */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	859 { U32 const litlen = (U32)(ip - anchor);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	860 U32 const ll0 = !litlen;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	861 U32 const nbMatches = ZSTD_BtGetAllMatches(ms, ip, iend, dictMode, rep, ll0, matches, minMatch);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	862 if (!nbMatches) { ip++; continue; }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	863
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	864 /* initialize opt[0] */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	865 { U32 i ; for (i=0; i<ZSTD_REP_NUM; i++) opt[0].rep[i] = rep[i]; }
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	866 opt[0].mlen = 0; /* means is_a_literal */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	867 opt[0].litlen = litlen;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	868 opt[0].price = ZSTD_literalsContribution(anchor, litlen, optStatePtr, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	869
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	870 /* large match -> immediate encoding */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	871 { U32 const maxML = matches[nbMatches-1].len;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	872 U32 const maxOffset = matches[nbMatches-1].off;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	873 DEBUGLOG(6, "found %u matches of maxLength=%u and maxOffCode=%u at cPos=%u => start new serie",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	874 nbMatches, maxML, maxOffset, (U32)(ip-prefixStart));
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	875
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	876 if (maxML > sufficient_len) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	877 lastSequence.litlen = litlen;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	878 lastSequence.mlen = maxML;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	879 lastSequence.off = maxOffset;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	880 DEBUGLOG(6, "large match (%u>%u), immediate encoding",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	881 maxML, sufficient_len);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	882 cur = 0;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	883 last_pos = ZSTD_totalLen(lastSequence);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	884 goto _shortestPath;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	885 } }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	886
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	887 /* set prices for first matches starting position == 0 */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	888 { U32 const literalsPrice = opt[0].price + ZSTD_litLengthPrice(0, optStatePtr, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	889 U32 pos;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	890 U32 matchNb;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	891 for (pos = 1; pos < minMatch; pos++) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	892 opt[pos].price = ZSTD_MAX_PRICE; /* mlen, litlen and price will be fixed during forward scanning */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	893 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	894 for (matchNb = 0; matchNb < nbMatches; matchNb++) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	895 U32 const offset = matches[matchNb].off;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	896 U32 const end = matches[matchNb].len;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	897 repcodes_t const repHistory = ZSTD_updateRep(rep, offset, ll0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	898 for ( ; pos <= end ; pos++ ) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	899 U32 const matchPrice = ZSTD_getMatchPrice(offset, pos, optStatePtr, optLevel);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	900 U32 const sequencePrice = literalsPrice + matchPrice;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	901 DEBUGLOG(7, "rPos:%u => set initial price : %.2f",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	902 pos, ZSTD_fCost(sequencePrice));
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	903 opt[pos].mlen = pos;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	904 opt[pos].off = offset;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	905 opt[pos].litlen = litlen;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	906 opt[pos].price = sequencePrice;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	907 ZSTD_STATIC_ASSERT(sizeof(opt[pos].rep) == sizeof(repHistory));
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	908 memcpy(opt[pos].rep, &repHistory, sizeof(repHistory));
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	909 } }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	910 last_pos = pos-1;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	911 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	912 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	913
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	914 /* check further positions */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	915 for (cur = 1; cur <= last_pos; cur++) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	916 const BYTE* const inr = ip + cur;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	917 assert(cur < ZSTD_OPT_NUM);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	918 DEBUGLOG(7, "cPos:%zi==rPos:%u", inr-istart, cur)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	919
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	920 /* Fix current position with one literal if cheaper */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	921 { U32 const litlen = (opt[cur-1].mlen == 0) ? opt[cur-1].litlen + 1 : 1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	922 int const price = opt[cur-1].price
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	923 + ZSTD_rawLiteralsCost(ip+cur-1, 1, optStatePtr, optLevel)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	924 + ZSTD_litLengthPrice(litlen, optStatePtr, optLevel)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	925 - ZSTD_litLengthPrice(litlen-1, optStatePtr, optLevel);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	926 assert(price < 1000000000); /* overflow check */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	927 if (price <= opt[cur].price) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	928 DEBUGLOG(7, "cPos:%zi==rPos:%u : better price (%.2f<=%.2f) using literal (ll==%u) (hist:%u,%u,%u)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	929 inr-istart, cur, ZSTD_fCost(price), ZSTD_fCost(opt[cur].price), litlen,
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	930 opt[cur-1].rep[0], opt[cur-1].rep[1], opt[cur-1].rep[2]);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	931 opt[cur].mlen = 0;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	932 opt[cur].off = 0;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	933 opt[cur].litlen = litlen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	934 opt[cur].price = price;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	935 memcpy(opt[cur].rep, opt[cur-1].rep, sizeof(opt[cur].rep));
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	936 } else {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	937 DEBUGLOG(7, "cPos:%zi==rPos:%u : literal would cost more (%.2f>%.2f) (hist:%u,%u,%u)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	938 inr-istart, cur, ZSTD_fCost(price), ZSTD_fCost(opt[cur].price),
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	939 opt[cur].rep[0], opt[cur].rep[1], opt[cur].rep[2]);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	940 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	941 }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	942
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	943 /* last match must start at a minimum distance of 8 from oend */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	944 if (inr > ilimit) continue;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	945
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	946 if (cur == last_pos) break;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	947
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	948 if ( (optLevel==0) /static_test/
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	949 && (opt[cur+1].price <= opt[cur].price + (BITCOST_MULTIPLIER/2)) ) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	950 DEBUGLOG(7, "move to next rPos:%u : price is <=", cur+1);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	951 continue; /* skip unpromising positions; about ~+6% speed, -0.01 ratio */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	952 }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	953
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	954 { U32 const ll0 = (opt[cur].mlen != 0);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	955 U32 const litlen = (opt[cur].mlen == 0) ? opt[cur].litlen : 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	956 U32 const previousPrice = opt[cur].price;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	957 U32 const basePrice = previousPrice + ZSTD_litLengthPrice(0, optStatePtr, optLevel);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	958 U32 const nbMatches = ZSTD_BtGetAllMatches(ms, inr, iend, dictMode, opt[cur].rep, ll0, matches, minMatch);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	959 U32 matchNb;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	960 if (!nbMatches) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	961 DEBUGLOG(7, "rPos:%u : no match found", cur);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	962 continue;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	963 }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	964
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	965 { U32 const maxML = matches[nbMatches-1].len;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	966 DEBUGLOG(7, "cPos:%zi==rPos:%u, found %u matches, of maxLength=%u",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	967 inr-istart, cur, nbMatches, maxML);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	968
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	969 if ( (maxML > sufficient_len)
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	970 \|\| (cur + maxML >= ZSTD_OPT_NUM) ) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	971 lastSequence.mlen = maxML;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	972 lastSequence.off = matches[nbMatches-1].off;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	973 lastSequence.litlen = litlen;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	974 cur -= (opt[cur].mlen==0) ? opt[cur].litlen : 0; /* last sequence is actually only literals, fix cur to last match - note : may underflow, in which case, it's first sequence, and it's okay */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	975 last_pos = cur + ZSTD_totalLen(lastSequence);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	976 if (cur > ZSTD_OPT_NUM) cur = 0; /* underflow => first match */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	977 goto _shortestPath;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	978 } }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	979
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	980 /* set prices using matches found at position == cur */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	981 for (matchNb = 0; matchNb < nbMatches; matchNb++) {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	982 U32 const offset = matches[matchNb].off;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	983 repcodes_t const repHistory = ZSTD_updateRep(opt[cur].rep, offset, ll0);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	984 U32 const lastML = matches[matchNb].len;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	985 U32 const startML = (matchNb>0) ? matches[matchNb-1].len+1 : minMatch;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	986 U32 mlen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	987
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	988 DEBUGLOG(7, "testing match %u => offCode=%4u, mlen=%2u, llen=%2u",
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	989 matchNb, matches[matchNb].off, lastML, litlen);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	990
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	991 for (mlen = lastML; mlen >= startML; mlen--) { /* scan downward */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	992 U32 const pos = cur + mlen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	993 int const price = basePrice + ZSTD_getMatchPrice(offset, mlen, optStatePtr, optLevel);
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	994
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	995 if ((pos > last_pos) \|\| (price < opt[pos].price)) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	996 DEBUGLOG(7, "rPos:%u (ml=%2u) => new better price (%.2f<%.2f)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	997 pos, mlen, ZSTD_fCost(price), ZSTD_fCost(opt[pos].price));
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	998 while (last_pos < pos) { opt[last_pos+1].price = ZSTD_MAX_PRICE; last_pos++; } /* fill empty positions */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	999 opt[pos].mlen = mlen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1000 opt[pos].off = offset;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1001 opt[pos].litlen = litlen;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1002 opt[pos].price = price;
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1003 ZSTD_STATIC_ASSERT(sizeof(opt[pos].rep) == sizeof(repHistory));
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1004 memcpy(opt[pos].rep, &repHistory, sizeof(repHistory));
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1005 } else {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1006 DEBUGLOG(7, "rPos:%u (ml=%2u) => new price is worse (%.2f>=%.2f)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1007 pos, mlen, ZSTD_fCost(price), ZSTD_fCost(opt[pos].price));
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1008 if (optLevel==0) break; /* early update abort; gets ~+10% speed for about -0.01 ratio loss */
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1009 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1010 } } }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1011 } /* for (cur = 1; cur <= last_pos; cur++) */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1012
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1013 lastSequence = opt[last_pos];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1014 cur = last_pos > ZSTD_totalLen(lastSequence) ? last_pos - ZSTD_totalLen(lastSequence) : 0; /* single sequence, and it starts before `ip` */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1015 assert(cur < ZSTD_OPT_NUM); /* control overflow*/
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1016
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1017 _shortestPath: /* cur, last_pos, best_mlen, best_off have to be set */
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1018 assert(opt[0].mlen == 0);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1019
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1020 { U32 const storeEnd = cur + 1;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1021 U32 storeStart = storeEnd;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1022 U32 seqPos = cur;
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1023
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1024 DEBUGLOG(6, "start reverse traversal (last_pos:%u, cur:%u)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1025 last_pos, cur); (void)last_pos;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1026 assert(storeEnd < ZSTD_OPT_NUM);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1027 DEBUGLOG(6, "last sequence copied into pos=%u (llen=%u,mlen=%u,ofc=%u)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1028 storeEnd, lastSequence.litlen, lastSequence.mlen, lastSequence.off);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1029 opt[storeEnd] = lastSequence;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1030 while (seqPos > 0) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1031 U32 const backDist = ZSTD_totalLen(opt[seqPos]);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1032 storeStart--;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1033 DEBUGLOG(6, "sequence from rPos=%u copied into pos=%u (llen=%u,mlen=%u,ofc=%u)",
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1034 seqPos, storeStart, opt[seqPos].litlen, opt[seqPos].mlen, opt[seqPos].off);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1035 opt[storeStart] = opt[seqPos];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1036 seqPos = (seqPos > backDist) ? seqPos - backDist : 0;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1037 }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1038
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1039 /* save sequences */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1040 DEBUGLOG(6, "sending selected sequences into seqStore")
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1041 { U32 storePos;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1042 for (storePos=storeStart; storePos <= storeEnd; storePos++) {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1043 U32 const llen = opt[storePos].litlen;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1044 U32 const mlen = opt[storePos].mlen;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1045 U32 const offCode = opt[storePos].off;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1046 U32 const advance = llen + mlen;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1047 DEBUGLOG(6, "considering seq starting at %zi, llen=%u, mlen=%u",
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1048 anchor - istart, (unsigned)llen, (unsigned)mlen);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1049
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1050 if (mlen==0) { /* only literals => must be last "sequence", actually starting a new stream of sequences */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1051 assert(storePos == storeEnd); /* must be last sequence */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1052 ip = anchor + llen; /* last "sequence" is a bunch of literals => don't progress anchor */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1053 continue; /* will finish */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1054 }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1055
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1056 /* repcodes update : like ZSTD_updateRep(), but update in place */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1057 if (offCode >= ZSTD_REP_NUM) { /* full offset */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1058 rep[2] = rep[1];
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1059 rep[1] = rep[0];
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1060 rep[0] = offCode - ZSTD_REP_MOVE;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1061 } else { /* repcode */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1062 U32 const repCode = offCode + (llen==0);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1063 if (repCode) { /* note : if repCode==0, no change */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1064 U32 const currentOffset = (repCode==ZSTD_REP_NUM) ? (rep[0] - 1) : rep[repCode];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1065 if (repCode >= 2) rep[2] = rep[1];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1066 rep[1] = rep[0];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1067 rep[0] = currentOffset;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1068 } }
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1069
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1070 assert(anchor + llen <= iend);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1071 ZSTD_updateStats(optStatePtr, llen, anchor, offCode, mlen);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1072 ZSTD_storeSeq(seqStore, llen, anchor, offCode, mlen-MINMATCH);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1073 anchor += advance;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1074 ip = anchor;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1075 } }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1076 ZSTD_setBasePrices(optStatePtr, optLevel);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1077 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1078
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1079 } /* while (ip < ilimit) */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1080
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1081 /* Return the last literals size */
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1082 return iend - anchor;
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1083 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1084
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1085
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1086 size_t ZSTD_compressBlock_btopt(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1087 ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1088 const void* src, size_t srcSize)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1089 {
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1090 DEBUGLOG(5, "ZSTD_compressBlock_btopt");
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1091 return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 0 /optLevel/, ZSTD_noDict);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1092 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1093
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1094
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1095 /* used in 2-pass strategy */
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1096 static U32 ZSTD_upscaleStat(unsigned* table, U32 lastEltIndex, int bonus)
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1097 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1098 U32 s, sum=0;
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1099 assert(ZSTD_FREQ_DIV+bonus >= 0);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1100 for (s=0; s<lastEltIndex+1; s++) {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1101 table[s] <<= ZSTD_FREQ_DIV+bonus;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1102 table[s]--;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1103 sum += table[s];
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1104 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1105 return sum;
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1106 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1107
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1108 /* used in 2-pass strategy */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1109 MEM_STATIC void ZSTD_upscaleStats(optState_t* optPtr)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1110 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1111 optPtr->litSum = ZSTD_upscaleStat(optPtr->litFreq, MaxLit, 0);
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1112 optPtr->litLengthSum = ZSTD_upscaleStat(optPtr->litLengthFreq, MaxLL, 0);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1113 optPtr->matchLengthSum = ZSTD_upscaleStat(optPtr->matchLengthFreq, MaxML, 0);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1114 optPtr->offCodeSum = ZSTD_upscaleStat(optPtr->offCodeFreq, MaxOff, 0);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1115 }
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1116
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1117 /* ZSTD_initStats_ultra():
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1118 * make a first compression pass, just to seed stats with more accurate starting values.
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1119 * only works on first block, with no dictionary and no ldm.
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1120 * this function cannot error, hence its constract must be respected.
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1121 */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1122 static void
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1123 ZSTD_initStats_ultra(ZSTD_matchState_t* ms,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1124 seqStore_t* seqStore,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1125 U32 rep[ZSTD_REP_NUM],
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1126 const void* src, size_t srcSize)
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1127 {
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1128 U32 tmpRep[ZSTD_REP_NUM]; /* updated rep codes will sink here */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1129 memcpy(tmpRep, rep, sizeof(tmpRep));
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1130
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1131 DEBUGLOG(4, "ZSTD_initStats_ultra (srcSize=%zu)", srcSize);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1132 assert(ms->opt.litLengthSum == 0); /* first block */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1133 assert(seqStore->sequences == seqStore->sequencesStart); /* no ldm */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1134 assert(ms->window.dictLimit == ms->window.lowLimit); /* no dictionary */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1135 assert(ms->window.dictLimit - ms->nextToUpdate <= 1); /* no prefix (note: intentional overflow, defined as 2-complement) */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1136
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1137 ZSTD_compressBlock_opt_generic(ms, seqStore, tmpRep, src, srcSize, 2 /optLevel/, ZSTD_noDict); /* generate stats into ms->opt*/
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1138
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1139 /* invalidate first scan from history */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1140 ZSTD_resetSeqStore(seqStore);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1141 ms->window.base -= srcSize;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1142 ms->window.dictLimit += (U32)srcSize;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1143 ms->window.lowLimit = ms->window.dictLimit;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1144 ms->nextToUpdate = ms->window.dictLimit;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1145 ms->nextToUpdate3 = ms->window.dictLimit;
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1146
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1147 /* re-inforce weight of collected statistics */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1148 ZSTD_upscaleStats(&ms->opt);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1149 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1150
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1151 size_t ZSTD_compressBlock_btultra(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1152 ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1153 const void* src, size_t srcSize)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1154 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1155 DEBUGLOG(5, "ZSTD_compressBlock_btultra (srcSize=%zu)", srcSize);
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1156 return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 2 /optLevel/, ZSTD_noDict);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1157 }
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1158
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1159 size_t ZSTD_compressBlock_btultra2(
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1160 ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1161 const void* src, size_t srcSize)
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1162 {
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1163 U32 const current = (U32)((const BYTE*)src - ms->window.base);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1164 DEBUGLOG(5, "ZSTD_compressBlock_btultra2 (srcSize=%zu)", srcSize);
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1165
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1166 /* 2-pass strategy:
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1167 * this strategy makes a first pass over first block to collect statistics
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1168 * and seed next round's statistics with it.
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1169 * After 1st pass, function forgets everything, and starts a new block.
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1170 * Consequently, this can only work if no data has been previously loaded in tables,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1171 * aka, no dictionary, no prefix, no ldm preprocessing.
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1172 * The compression ratio gain is generally small (~0.5% on first block),
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1173 * the cost is 2x cpu time on first block. */
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1174 assert(srcSize <= ZSTD_BLOCKSIZE_MAX);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1175 if ( (ms->opt.litLengthSum==0) /* first block */
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1176 && (seqStore->sequences == seqStore->sequencesStart) /* no ldm */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1177 && (ms->window.dictLimit == ms->window.lowLimit) /* no dictionary */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1178 && (current == ms->window.dictLimit) /* start of frame, nothing already loaded nor skipped */
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1179 && (srcSize > ZSTD_PREDEF_THRESHOLD)
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1180 ) {
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1181 ZSTD_initStats_ultra(ms, seqStore, rep, src, srcSize);
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1182 }
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1183
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1184 return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 2 /optLevel/, ZSTD_noDict);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1185 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1186
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1187 size_t ZSTD_compressBlock_btopt_dictMatchState(
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1188 ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1189 const void* src, size_t srcSize)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1190 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1191 return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 0 /optLevel/, ZSTD_dictMatchState);
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1192 }
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1193
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1194 size_t ZSTD_compressBlock_btultra_dictMatchState(
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1195 ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1196 const void* src, size_t srcSize)
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1197 {
73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1198 return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 2 /optLevel/, ZSTD_dictMatchState);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1199 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1200
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1201 size_t ZSTD_compressBlock_btopt_extDict(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1202 ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1203 const void* src, size_t srcSize)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1204 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1205 return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 0 /optLevel/, ZSTD_extDict);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1206 }
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1207
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1208 size_t ZSTD_compressBlock_btultra_extDict(
b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1209 ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1210 const void* src, size_t srcSize)
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1211 {
40121 73fef626dae3 zstandard: vendor python-zstandard 0.10.1 Gregory Szorc <gregory.szorc@gmail.com> parents: 37495 diff changeset	1212 return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 2 /optLevel/, ZSTD_extDict);
37495 b1fb341d8a61 zstandard: vendor python-zstandard 0.9.0 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1213 }
42070 675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1214
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1215 /* note : no btultra2 variant for extDict nor dictMatchState,
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1216 * because btultra2 is not meant to work with dictionaries
675775c33ab6 zstandard: vendor python-zstandard 0.11 Gregory Szorc <gregory.szorc@gmail.com> parents: 40121 diff changeset	1217 * and is only specific for the first block (no prefix) */

Mercurial > public > mercurial-scm > hg

annotate contrib/python-zstandard/zstd/compress/zstd_opt.c @ 42070:675775c33ab6