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

annotate contrib/python-zstandard/zstd/compress/zstd_compress.c @ 30822:b54a2984cdd4

zstd: vendor python-zstandard 0.6.0 Commit 63c68d6f5fc8de4afd9bde81b13b537beb4e47e8 from https://github.com/indygreg/python-zstandard is imported without modifications (other than removing unwanted files). This includes minor performance and feature improvements. It also changes the vendored zstd library from 1.1.1 to 1.1.2. # no-check-commit

author	Gregory Szorc <gregory.szorc@gmail.com>
date	Sat, 14 Jan 2017 19:41:43 -0800
parents	2e484bdea8c4
children	c32454d69b85

rev	line source
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1 /**
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2 * Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3 * All rights reserved.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	4 *
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	5 * This source code is licensed under the BSD-style license found in the
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	6 * LICENSE file in the root directory of this source tree. An additional grant
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	7 * of patent rights can be found in the PATENTS file in the same directory.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	8 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	9
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	10
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	11 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	12 * Dependencies
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	13 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	14 #include <string.h> /* memset */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	15 #include "mem.h"
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	16 #define XXH_STATIC_LINKING_ONLY /* XXH64_state_t */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	17 #include "xxhash.h" /* XXH_reset, update, digest */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	18 #define FSE_STATIC_LINKING_ONLY /* FSE_encodeSymbol */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	19 #include "fse.h"
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	20 #define HUF_STATIC_LINKING_ONLY
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	21 #include "huf.h"
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	22 #include "zstd_internal.h" /* includes zstd.h */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	23
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	24
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	25 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	26 * Constants
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	27 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	28 static const U32 g_searchStrength = 8; /* control skip over incompressible data */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	29 #define HASH_READ_SIZE 8
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	30 typedef enum { ZSTDcs_created=0, ZSTDcs_init, ZSTDcs_ongoing, ZSTDcs_ending } ZSTD_compressionStage_e;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	31
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	32
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	33 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	34 * Helper functions
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	35 ***************************************/
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	36 #define ZSTD_STATIC_ASSERT(c) { enum { ZSTD_static_assert = 1/(int)(!!(c)) }; }
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	37 size_t ZSTD_compressBound(size_t srcSize) { return FSE_compressBound(srcSize) + 12; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	38
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	39
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	40 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	41 * Sequence storage
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	42 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	43 static void ZSTD_resetSeqStore(seqStore_t* ssPtr)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	44 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	45 ssPtr->lit = ssPtr->litStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	46 ssPtr->sequences = ssPtr->sequencesStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	47 ssPtr->longLengthID = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	48 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	49
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	50
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	51 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	52 * Context memory management
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	53 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	54 struct ZSTD_CCtx_s
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	55 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	56 const BYTE* nextSrc; /* next block here to continue on current prefix */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	57 const BYTE* base; /* All regular indexes relative to this position */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	58 const BYTE* dictBase; /* extDict indexes relative to this position */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	59 U32 dictLimit; /* below that point, need extDict */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	60 U32 lowLimit; /* below that point, no more data */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	61 U32 nextToUpdate; /* index from which to continue dictionary update */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	62 U32 nextToUpdate3; /* index from which to continue dictionary update */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	63 U32 hashLog3; /* dispatch table : larger == faster, more memory */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	64 U32 loadedDictEnd;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	65 ZSTD_compressionStage_e stage;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	66 U32 rep[ZSTD_REP_NUM];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	67 U32 savedRep[ZSTD_REP_NUM];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	68 U32 dictID;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	69 ZSTD_parameters params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	70 void* workSpace;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	71 size_t workSpaceSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	72 size_t blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	73 U64 frameContentSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	74 XXH64_state_t xxhState;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	75 ZSTD_customMem customMem;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	76
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	77 seqStore_t seqStore; /* sequences storage ptrs */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	78 U32* hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	79 U32* hashTable3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	80 U32* chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	81 HUF_CElt* hufTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	82 U32 flagStaticTables;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	83 FSE_CTable offcodeCTable [FSE_CTABLE_SIZE_U32(OffFSELog, MaxOff)];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	84 FSE_CTable matchlengthCTable[FSE_CTABLE_SIZE_U32(MLFSELog, MaxML)];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	85 FSE_CTable litlengthCTable [FSE_CTABLE_SIZE_U32(LLFSELog, MaxLL)];
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	86 unsigned tmpCounters[1024];
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	87 };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	88
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	89 ZSTD_CCtx* ZSTD_createCCtx(void)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	90 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	91 return ZSTD_createCCtx_advanced(defaultCustomMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	92 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	93
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	94 ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	95 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	96 ZSTD_CCtx* cctx;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	97
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	98 if (!customMem.customAlloc && !customMem.customFree) customMem = defaultCustomMem;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	99 if (!customMem.customAlloc \|\| !customMem.customFree) return NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	100
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	101 cctx = (ZSTD_CCtx*) ZSTD_malloc(sizeof(ZSTD_CCtx), customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	102 if (!cctx) return NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	103 memset(cctx, 0, sizeof(ZSTD_CCtx));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	104 memcpy(&(cctx->customMem), &customMem, sizeof(customMem));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	105 return cctx;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	106 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	107
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	108 size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	109 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	110 if (cctx==NULL) return 0; /* support free on NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	111 ZSTD_free(cctx->workSpace, cctx->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	112 ZSTD_free(cctx, cctx->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	113 return 0; /* reserved as a potential error code in the future */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	114 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	115
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	116 size_t ZSTD_sizeof_CCtx(const ZSTD_CCtx* cctx)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	117 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	118 if (cctx==NULL) return 0; /* support sizeof on NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	119 return sizeof(*cctx) + cctx->workSpaceSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	120 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	121
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	122 const seqStore_t* ZSTD_getSeqStore(const ZSTD_CCtx* ctx) /* hidden interface */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	123 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	124 return &(ctx->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	125 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	126
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	127 static ZSTD_parameters ZSTD_getParamsFromCCtx(const ZSTD_CCtx* cctx)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	128 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	129 return cctx->params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	130 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	131
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	132
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	133 /** ZSTD_checkParams() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	134 ensure param values remain within authorized range.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	135 @return : 0, or an error code if one value is beyond authorized range */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	136 size_t ZSTD_checkCParams(ZSTD_compressionParameters cParams)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	137 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	138 # define CLAMPCHECK(val,min,max) { if ((val<min) \| (val>max)) return ERROR(compressionParameter_unsupported); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	139 CLAMPCHECK(cParams.windowLog, ZSTD_WINDOWLOG_MIN, ZSTD_WINDOWLOG_MAX);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	140 CLAMPCHECK(cParams.chainLog, ZSTD_CHAINLOG_MIN, ZSTD_CHAINLOG_MAX);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	141 CLAMPCHECK(cParams.hashLog, ZSTD_HASHLOG_MIN, ZSTD_HASHLOG_MAX);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	142 CLAMPCHECK(cParams.searchLog, ZSTD_SEARCHLOG_MIN, ZSTD_SEARCHLOG_MAX);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	143 { U32 const searchLengthMin = ((cParams.strategy == ZSTD_fast) \| (cParams.strategy == ZSTD_greedy)) ? ZSTD_SEARCHLENGTH_MIN+1 : ZSTD_SEARCHLENGTH_MIN;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	144 U32 const searchLengthMax = (cParams.strategy == ZSTD_fast) ? ZSTD_SEARCHLENGTH_MAX : ZSTD_SEARCHLENGTH_MAX-1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	145 CLAMPCHECK(cParams.searchLength, searchLengthMin, searchLengthMax); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	146 CLAMPCHECK(cParams.targetLength, ZSTD_TARGETLENGTH_MIN, ZSTD_TARGETLENGTH_MAX);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	147 if ((U32)(cParams.strategy) > (U32)ZSTD_btopt2) return ERROR(compressionParameter_unsupported);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	148 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	149 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	150
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	151
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	152 /** ZSTD_cycleLog() :
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	153 * condition for correct operation : hashLog > 1 */
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	154 static U32 ZSTD_cycleLog(U32 hashLog, ZSTD_strategy strat)
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	155 {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	156 U32 const btScale = ((U32)strat >= (U32)ZSTD_btlazy2);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	157 return hashLog - btScale;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	158 }
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	159
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	160 /** ZSTD_adjustCParams() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	161 optimize `cPar` for a given input (`srcSize` and `dictSize`).
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	162 mostly downsizing to reduce memory consumption and initialization.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	163 Both `srcSize` and `dictSize` are optional (use 0 if unknown),
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	164 but if both are 0, no optimization can be done.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	165 Note : cPar is considered validated at this stage. Use ZSTD_checkParams() to ensure that. */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	166 ZSTD_compressionParameters ZSTD_adjustCParams(ZSTD_compressionParameters cPar, unsigned long long srcSize, size_t dictSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	167 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	168 if (srcSize+dictSize == 0) return cPar; /* no size information available : no adjustment */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	169
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	170 /* resize params, to use less memory when necessary */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	171 { U32 const minSrcSize = (srcSize==0) ? 500 : 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	172 U64 const rSize = srcSize + dictSize + minSrcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	173 if (rSize < ((U64)1<<ZSTD_WINDOWLOG_MAX)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	174 U32 const srcLog = MAX(ZSTD_HASHLOG_MIN, ZSTD_highbit32((U32)(rSize)-1) + 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	175 if (cPar.windowLog > srcLog) cPar.windowLog = srcLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	176 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	177 if (cPar.hashLog > cPar.windowLog) cPar.hashLog = cPar.windowLog;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	178 { U32 const cycleLog = ZSTD_cycleLog(cPar.chainLog, cPar.strategy);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	179 if (cycleLog > cPar.windowLog) cPar.chainLog -= (cycleLog - cPar.windowLog);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	180 }
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	181
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	182 if (cPar.windowLog < ZSTD_WINDOWLOG_ABSOLUTEMIN) cPar.windowLog = ZSTD_WINDOWLOG_ABSOLUTEMIN; /* required for frame header */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	183
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	184 return cPar;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	185 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	186
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	187
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	188 size_t ZSTD_estimateCCtxSize(ZSTD_compressionParameters cParams)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	189 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	190 size_t const blockSize = MIN(ZSTD_BLOCKSIZE_ABSOLUTEMAX, (size_t)1 << cParams.windowLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	191 U32 const divider = (cParams.searchLength==3) ? 3 : 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	192 size_t const maxNbSeq = blockSize / divider;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	193 size_t const tokenSpace = blockSize + 11*maxNbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	194
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	195 size_t const chainSize = (cParams.strategy == ZSTD_fast) ? 0 : (1 << cParams.chainLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	196 size_t const hSize = ((size_t)1) << cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	197 U32 const hashLog3 = (cParams.searchLength>3) ? 0 : MIN(ZSTD_HASHLOG3_MAX, cParams.windowLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	198 size_t const h3Size = ((size_t)1) << hashLog3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	199 size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	200
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	201 size_t const optSpace = ((MaxML+1) + (MaxLL+1) + (MaxOff+1) + (1<<Litbits))*sizeof(U32)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	202 + (ZSTD_OPT_NUM+1)*(sizeof(ZSTD_match_t) + sizeof(ZSTD_optimal_t));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	203 size_t const neededSpace = tableSpace + (256sizeof(U32)) / huffTable */ + tokenSpace
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	204 + (((cParams.strategy == ZSTD_btopt) \|\| (cParams.strategy == ZSTD_btopt2)) ? optSpace : 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	205
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	206 return sizeof(ZSTD_CCtx) + neededSpace;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	207 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	208
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	209
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	210 static U32 ZSTD_equivalentParams(ZSTD_parameters param1, ZSTD_parameters param2)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	211 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	212 return (param1.cParams.hashLog == param2.cParams.hashLog)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	213 & (param1.cParams.chainLog == param2.cParams.chainLog)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	214 & (param1.cParams.strategy == param2.cParams.strategy)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	215 & ((param1.cParams.searchLength==3) == (param2.cParams.searchLength==3));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	216 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	217
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	218 /*! ZSTD_continueCCtx() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	219 reuse CCtx without reset (note : requires no dictionary) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	220 static size_t ZSTD_continueCCtx(ZSTD_CCtx* cctx, ZSTD_parameters params, U64 frameContentSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	221 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	222 U32 const end = (U32)(cctx->nextSrc - cctx->base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	223 cctx->params = params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	224 cctx->frameContentSize = frameContentSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	225 cctx->lowLimit = end;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	226 cctx->dictLimit = end;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	227 cctx->nextToUpdate = end+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	228 cctx->stage = ZSTDcs_init;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	229 cctx->dictID = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	230 cctx->loadedDictEnd = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	231 { int i; for (i=0; i<ZSTD_REP_NUM; i++) cctx->rep[i] = repStartValue[i]; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	232 cctx->seqStore.litLengthSum = 0; /* force reset of btopt stats */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	233 XXH64_reset(&cctx->xxhState, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	234 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	235 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	236
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	237 typedef enum { ZSTDcrp_continue, ZSTDcrp_noMemset, ZSTDcrp_fullReset } ZSTD_compResetPolicy_e;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	238
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	239 /*! ZSTD_resetCCtx_advanced() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	240 note : 'params' must be validated */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	241 static size_t ZSTD_resetCCtx_advanced (ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	242 ZSTD_parameters params, U64 frameContentSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	243 ZSTD_compResetPolicy_e const crp)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	244 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	245 if (crp == ZSTDcrp_continue)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	246 if (ZSTD_equivalentParams(params, zc->params))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	247 return ZSTD_continueCCtx(zc, params, frameContentSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	248
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	249 { size_t const blockSize = MIN(ZSTD_BLOCKSIZE_ABSOLUTEMAX, (size_t)1 << params.cParams.windowLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	250 U32 const divider = (params.cParams.searchLength==3) ? 3 : 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	251 size_t const maxNbSeq = blockSize / divider;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	252 size_t const tokenSpace = blockSize + 11*maxNbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	253 size_t const chainSize = (params.cParams.strategy == ZSTD_fast) ? 0 : (1 << params.cParams.chainLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	254 size_t const hSize = ((size_t)1) << params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	255 U32 const hashLog3 = (params.cParams.searchLength>3) ? 0 : MIN(ZSTD_HASHLOG3_MAX, params.cParams.windowLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	256 size_t const h3Size = ((size_t)1) << hashLog3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	257 size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	258 void* ptr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	259
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	260 /* Check if workSpace is large enough, alloc a new one if needed */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	261 { size_t const optSpace = ((MaxML+1) + (MaxLL+1) + (MaxOff+1) + (1<<Litbits))*sizeof(U32)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	262 + (ZSTD_OPT_NUM+1)*(sizeof(ZSTD_match_t) + sizeof(ZSTD_optimal_t));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	263 size_t const neededSpace = tableSpace + (256sizeof(U32)) / huffTable */ + tokenSpace
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	264 + (((params.cParams.strategy == ZSTD_btopt) \|\| (params.cParams.strategy == ZSTD_btopt2)) ? optSpace : 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	265 if (zc->workSpaceSize < neededSpace) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	266 ZSTD_free(zc->workSpace, zc->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	267 zc->workSpace = ZSTD_malloc(neededSpace, zc->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	268 if (zc->workSpace == NULL) return ERROR(memory_allocation);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	269 zc->workSpaceSize = neededSpace;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	270 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	271
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	272 if (crp!=ZSTDcrp_noMemset) memset(zc->workSpace, 0, tableSpace); /* reset tables only */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	273 XXH64_reset(&zc->xxhState, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	274 zc->hashLog3 = hashLog3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	275 zc->hashTable = (U32*)(zc->workSpace);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	276 zc->chainTable = zc->hashTable + hSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	277 zc->hashTable3 = zc->chainTable + chainSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	278 ptr = zc->hashTable3 + h3Size;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	279 zc->hufTable = (HUF_CElt*)ptr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	280 zc->flagStaticTables = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	281 ptr = ((U32)ptr) + 256; / note : HUF_CElt* is incomplete type, size is simulated using U32 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	282
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	283 zc->nextToUpdate = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	284 zc->nextSrc = NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	285 zc->base = NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	286 zc->dictBase = NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	287 zc->dictLimit = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	288 zc->lowLimit = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	289 zc->params = params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	290 zc->blockSize = blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	291 zc->frameContentSize = frameContentSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	292 { int i; for (i=0; i<ZSTD_REP_NUM; i++) zc->rep[i] = repStartValue[i]; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	293
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	294 if ((params.cParams.strategy == ZSTD_btopt) \|\| (params.cParams.strategy == ZSTD_btopt2)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	295 zc->seqStore.litFreq = (U32*)ptr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	296 zc->seqStore.litLengthFreq = zc->seqStore.litFreq + (1<<Litbits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	297 zc->seqStore.matchLengthFreq = zc->seqStore.litLengthFreq + (MaxLL+1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	298 zc->seqStore.offCodeFreq = zc->seqStore.matchLengthFreq + (MaxML+1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	299 ptr = zc->seqStore.offCodeFreq + (MaxOff+1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	300 zc->seqStore.matchTable = (ZSTD_match_t*)ptr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	301 ptr = zc->seqStore.matchTable + ZSTD_OPT_NUM+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	302 zc->seqStore.priceTable = (ZSTD_optimal_t*)ptr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	303 ptr = zc->seqStore.priceTable + ZSTD_OPT_NUM+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	304 zc->seqStore.litLengthSum = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	305 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	306 zc->seqStore.sequencesStart = (seqDef*)ptr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	307 ptr = zc->seqStore.sequencesStart + maxNbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	308 zc->seqStore.llCode = (BYTE*) ptr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	309 zc->seqStore.mlCode = zc->seqStore.llCode + maxNbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	310 zc->seqStore.ofCode = zc->seqStore.mlCode + maxNbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	311 zc->seqStore.litStart = zc->seqStore.ofCode + maxNbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	312
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	313 zc->stage = ZSTDcs_init;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	314 zc->dictID = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	315 zc->loadedDictEnd = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	316
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	317 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	318 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	319 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	320
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	321
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	322 /*! ZSTD_copyCCtx() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	323 * Duplicate an existing context `srcCCtx` into another one `dstCCtx`.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	324 * Only works during stage ZSTDcs_init (i.e. after creation, but before first call to ZSTD_compressContinue()).
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	325 * @return : 0, or an error code */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	326 size_t ZSTD_copyCCtx(ZSTD_CCtx* dstCCtx, const ZSTD_CCtx* srcCCtx, unsigned long long pledgedSrcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	327 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	328 if (srcCCtx->stage!=ZSTDcs_init) return ERROR(stage_wrong);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	329
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	330 memcpy(&dstCCtx->customMem, &srcCCtx->customMem, sizeof(ZSTD_customMem));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	331 ZSTD_resetCCtx_advanced(dstCCtx, srcCCtx->params, pledgedSrcSize, ZSTDcrp_noMemset);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	332
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	333 /* copy tables */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	334 { size_t const chainSize = (srcCCtx->params.cParams.strategy == ZSTD_fast) ? 0 : (1 << srcCCtx->params.cParams.chainLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	335 size_t const hSize = ((size_t)1) << srcCCtx->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	336 size_t const h3Size = (size_t)1 << srcCCtx->hashLog3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	337 size_t const tableSpace = (chainSize + hSize + h3Size) * sizeof(U32);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	338 memcpy(dstCCtx->workSpace, srcCCtx->workSpace, tableSpace);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	339 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	340
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	341 /* copy dictionary offsets */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	342 dstCCtx->nextToUpdate = srcCCtx->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	343 dstCCtx->nextToUpdate3= srcCCtx->nextToUpdate3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	344 dstCCtx->nextSrc = srcCCtx->nextSrc;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	345 dstCCtx->base = srcCCtx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	346 dstCCtx->dictBase = srcCCtx->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	347 dstCCtx->dictLimit = srcCCtx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	348 dstCCtx->lowLimit = srcCCtx->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	349 dstCCtx->loadedDictEnd= srcCCtx->loadedDictEnd;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	350 dstCCtx->dictID = srcCCtx->dictID;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	351
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	352 /* copy entropy tables */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	353 dstCCtx->flagStaticTables = srcCCtx->flagStaticTables;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	354 if (srcCCtx->flagStaticTables) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	355 memcpy(dstCCtx->hufTable, srcCCtx->hufTable, 256*4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	356 memcpy(dstCCtx->litlengthCTable, srcCCtx->litlengthCTable, sizeof(dstCCtx->litlengthCTable));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	357 memcpy(dstCCtx->matchlengthCTable, srcCCtx->matchlengthCTable, sizeof(dstCCtx->matchlengthCTable));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	358 memcpy(dstCCtx->offcodeCTable, srcCCtx->offcodeCTable, sizeof(dstCCtx->offcodeCTable));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	359 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	360
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	361 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	362 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	363
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	364
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	365 /*! ZSTD_reduceTable() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	366 * reduce table indexes by `reducerValue` */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	367 static void ZSTD_reduceTable (U32* const table, U32 const size, U32 const reducerValue)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	368 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	369 U32 u;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	370 for (u=0 ; u < size ; u++) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	371 if (table[u] < reducerValue) table[u] = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	372 else table[u] -= reducerValue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	373 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	374 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	375
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	376 /*! ZSTD_reduceIndex() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	377 * rescale all indexes to avoid future overflow (indexes are U32) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	378 static void ZSTD_reduceIndex (ZSTD_CCtx* zc, const U32 reducerValue)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	379 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	380 { U32 const hSize = 1 << zc->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	381 ZSTD_reduceTable(zc->hashTable, hSize, reducerValue); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	382
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	383 { U32 const chainSize = (zc->params.cParams.strategy == ZSTD_fast) ? 0 : (1 << zc->params.cParams.chainLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	384 ZSTD_reduceTable(zc->chainTable, chainSize, reducerValue); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	385
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	386 { U32 const h3Size = (zc->hashLog3) ? 1 << zc->hashLog3 : 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	387 ZSTD_reduceTable(zc->hashTable3, h3Size, reducerValue); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	388 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	389
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	390
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	391 /-******************************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	392 * Block entropic compression
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	393 *********************************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	394
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	395 /* See doc/zstd_compression_format.md for detailed format description */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	396
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	397 size_t ZSTD_noCompressBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	398 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	399 if (srcSize + ZSTD_blockHeaderSize > dstCapacity) return ERROR(dstSize_tooSmall);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	400 memcpy((BYTE*)dst + ZSTD_blockHeaderSize, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	401 MEM_writeLE24(dst, (U32)(srcSize << 2) + (U32)bt_raw);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	402 return ZSTD_blockHeaderSize+srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	403 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	404
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	405
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	406 static size_t ZSTD_noCompressLiterals (void* dst, size_t dstCapacity, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	407 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	408 BYTE* const ostart = (BYTE* const)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	409 U32 const flSize = 1 + (srcSize>31) + (srcSize>4095);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	410
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	411 if (srcSize + flSize > dstCapacity) return ERROR(dstSize_tooSmall);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	412
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	413 switch(flSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	414 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	415 case 1: /* 2 - 1 - 5 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	416 ostart[0] = (BYTE)((U32)set_basic + (srcSize<<3));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	417 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	418 case 2: /* 2 - 2 - 12 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	419 MEM_writeLE16(ostart, (U16)((U32)set_basic + (1<<2) + (srcSize<<4)));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	420 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	421 default: /note : should not be necessary : flSize is within {1,2,3} /
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	422 case 3: /* 2 - 2 - 20 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	423 MEM_writeLE32(ostart, (U32)((U32)set_basic + (3<<2) + (srcSize<<4)));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	424 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	425 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	426
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	427 memcpy(ostart + flSize, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	428 return srcSize + flSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	429 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	430
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	431 static size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t dstCapacity, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	432 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	433 BYTE* const ostart = (BYTE* const)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	434 U32 const flSize = 1 + (srcSize>31) + (srcSize>4095);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	435
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	436 (void)dstCapacity; /* dstCapacity already guaranteed to be >=4, hence large enough */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	437
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	438 switch(flSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	439 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	440 case 1: /* 2 - 1 - 5 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	441 ostart[0] = (BYTE)((U32)set_rle + (srcSize<<3));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	442 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	443 case 2: /* 2 - 2 - 12 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	444 MEM_writeLE16(ostart, (U16)((U32)set_rle + (1<<2) + (srcSize<<4)));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	445 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	446 default: /note : should not be necessary : flSize is necessarily within {1,2,3} /
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	447 case 3: /* 2 - 2 - 20 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	448 MEM_writeLE32(ostart, (U32)((U32)set_rle + (3<<2) + (srcSize<<4)));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	449 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	450 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	451
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	452 ostart[flSize] = (const BYTE)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	453 return flSize+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	454 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	455
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	456
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	457 static size_t ZSTD_minGain(size_t srcSize) { return (srcSize >> 6) + 2; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	458
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	459 static size_t ZSTD_compressLiterals (ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	460 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	461 const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	462 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	463 size_t const minGain = ZSTD_minGain(srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	464 size_t const lhSize = 3 + (srcSize >= 1 KB) + (srcSize >= 16 KB);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	465 BYTE* const ostart = (BYTE*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	466 U32 singleStream = srcSize < 256;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	467 symbolEncodingType_e hType = set_compressed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	468 size_t cLitSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	469
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	470
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	471 /* small ? don't even attempt compression (speed opt) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	472 # define LITERAL_NOENTROPY 63
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	473 { size_t const minLitSize = zc->flagStaticTables ? 6 : LITERAL_NOENTROPY;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	474 if (srcSize <= minLitSize) return ZSTD_noCompressLiterals(dst, dstCapacity, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	475 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	476
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	477 if (dstCapacity < lhSize+1) return ERROR(dstSize_tooSmall); /* not enough space for compression */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	478 if (zc->flagStaticTables && (lhSize==3)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	479 hType = set_repeat;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	480 singleStream = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	481 cLitSize = HUF_compress1X_usingCTable(ostart+lhSize, dstCapacity-lhSize, src, srcSize, zc->hufTable);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	482 } else {
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	483 cLitSize = singleStream ? HUF_compress1X_wksp(ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 11, zc->tmpCounters, sizeof(zc->tmpCounters))
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	484 : HUF_compress4X_wksp(ostart+lhSize, dstCapacity-lhSize, src, srcSize, 255, 11, zc->tmpCounters, sizeof(zc->tmpCounters));
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	485 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	486
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	487 if ((cLitSize==0) \| (cLitSize >= srcSize - minGain))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	488 return ZSTD_noCompressLiterals(dst, dstCapacity, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	489 if (cLitSize==1)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	490 return ZSTD_compressRleLiteralsBlock(dst, dstCapacity, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	491
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	492 /* Build header */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	493 switch(lhSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	494 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	495 case 3: /* 2 - 2 - 10 - 10 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	496 { U32 const lhc = hType + ((!singleStream) << 2) + ((U32)srcSize<<4) + ((U32)cLitSize<<14);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	497 MEM_writeLE24(ostart, lhc);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	498 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	499 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	500 case 4: /* 2 - 2 - 14 - 14 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	501 { U32 const lhc = hType + (2 << 2) + ((U32)srcSize<<4) + ((U32)cLitSize<<18);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	502 MEM_writeLE32(ostart, lhc);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	503 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	504 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	505 default: /* should not be necessary, lhSize is only {3,4,5} */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	506 case 5: /* 2 - 2 - 18 - 18 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	507 { U32 const lhc = hType + (3 << 2) + ((U32)srcSize<<4) + ((U32)cLitSize<<22);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	508 MEM_writeLE32(ostart, lhc);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	509 ostart[4] = (BYTE)(cLitSize >> 10);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	510 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	511 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	512 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	513 return lhSize+cLitSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	514 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	515
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	516 static const BYTE LL_Code[64] = { 0, 1, 2, 3, 4, 5, 6, 7,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	517 8, 9, 10, 11, 12, 13, 14, 15,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	518 16, 16, 17, 17, 18, 18, 19, 19,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	519 20, 20, 20, 20, 21, 21, 21, 21,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	520 22, 22, 22, 22, 22, 22, 22, 22,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	521 23, 23, 23, 23, 23, 23, 23, 23,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	522 24, 24, 24, 24, 24, 24, 24, 24,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	523 24, 24, 24, 24, 24, 24, 24, 24 };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	524
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	525 static const BYTE ML_Code[128] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	526 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	527 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	528 38, 38, 38, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 39, 39,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	529 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	530 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	531 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	532 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42 };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	533
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	534
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	535 void ZSTD_seqToCodes(const seqStore_t* seqStorePtr)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	536 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	537 BYTE const LL_deltaCode = 19;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	538 BYTE const ML_deltaCode = 36;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	539 const seqDef* const sequences = seqStorePtr->sequencesStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	540 BYTE* const llCodeTable = seqStorePtr->llCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	541 BYTE* const ofCodeTable = seqStorePtr->ofCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	542 BYTE* const mlCodeTable = seqStorePtr->mlCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	543 U32 const nbSeq = (U32)(seqStorePtr->sequences - seqStorePtr->sequencesStart);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	544 U32 u;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	545 for (u=0; u<nbSeq; u++) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	546 U32 const llv = sequences[u].litLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	547 U32 const mlv = sequences[u].matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	548 llCodeTable[u] = (llv> 63) ? (BYTE)ZSTD_highbit32(llv) + LL_deltaCode : LL_Code[llv];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	549 ofCodeTable[u] = (BYTE)ZSTD_highbit32(sequences[u].offset);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	550 mlCodeTable[u] = (mlv>127) ? (BYTE)ZSTD_highbit32(mlv) + ML_deltaCode : ML_Code[mlv];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	551 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	552 if (seqStorePtr->longLengthID==1)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	553 llCodeTable[seqStorePtr->longLengthPos] = MaxLL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	554 if (seqStorePtr->longLengthID==2)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	555 mlCodeTable[seqStorePtr->longLengthPos] = MaxML;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	556 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	557
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	558
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	559 size_t ZSTD_compressSequences(ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	560 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	561 size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	562 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	563 const seqStore_t* seqStorePtr = &(zc->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	564 U32 count[MaxSeq+1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	565 S16 norm[MaxSeq+1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	566 FSE_CTable* CTable_LitLength = zc->litlengthCTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	567 FSE_CTable* CTable_OffsetBits = zc->offcodeCTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	568 FSE_CTable* CTable_MatchLength = zc->matchlengthCTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	569 U32 LLtype, Offtype, MLtype; /* compressed, raw or rle */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	570 const seqDef* const sequences = seqStorePtr->sequencesStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	571 const BYTE* const ofCodeTable = seqStorePtr->ofCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	572 const BYTE* const llCodeTable = seqStorePtr->llCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	573 const BYTE* const mlCodeTable = seqStorePtr->mlCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	574 BYTE* const ostart = (BYTE*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	575 BYTE* const oend = ostart + dstCapacity;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	576 BYTE* op = ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	577 size_t const nbSeq = seqStorePtr->sequences - seqStorePtr->sequencesStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	578 BYTE* seqHead;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	579 BYTE scratchBuffer[1<<MAX(MLFSELog,LLFSELog)];
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	580
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	581 /* Compress literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	582 { const BYTE* const literals = seqStorePtr->litStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	583 size_t const litSize = seqStorePtr->lit - literals;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	584 size_t const cSize = ZSTD_compressLiterals(zc, op, dstCapacity, literals, litSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	585 if (ZSTD_isError(cSize)) return cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	586 op += cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	587 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	588
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	589 /* Sequences Header */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	590 if ((oend-op) < 3 /max nbSeq Size/ + 1 /seqHead /) return ERROR(dstSize_tooSmall);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	591 if (nbSeq < 0x7F) *op++ = (BYTE)nbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	592 else if (nbSeq < LONGNBSEQ) op[0] = (BYTE)((nbSeq>>8) + 0x80), op[1] = (BYTE)nbSeq, op+=2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	593 else op[0]=0xFF, MEM_writeLE16(op+1, (U16)(nbSeq - LONGNBSEQ)), op+=3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	594 if (nbSeq==0) goto _check_compressibility;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	595
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	596 /* seqHead : flags for FSE encoding type */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	597 seqHead = op++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	598
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	599 #define MIN_SEQ_FOR_DYNAMIC_FSE 64
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	600 #define MAX_SEQ_FOR_STATIC_FSE 1000
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	601
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	602 /* convert length/distances into codes */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	603 ZSTD_seqToCodes(seqStorePtr);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	604
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	605 /* CTable for Literal Lengths */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	606 { U32 max = MaxLL;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	607 size_t const mostFrequent = FSE_countFast_wksp(count, &max, llCodeTable, nbSeq, zc->tmpCounters);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	608 if ((mostFrequent == nbSeq) && (nbSeq > 2)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	609 *op++ = llCodeTable[0];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	610 FSE_buildCTable_rle(CTable_LitLength, (BYTE)max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	611 LLtype = set_rle;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	612 } else if ((zc->flagStaticTables) && (nbSeq < MAX_SEQ_FOR_STATIC_FSE)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	613 LLtype = set_repeat;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	614 } else if ((nbSeq < MIN_SEQ_FOR_DYNAMIC_FSE) \|\| (mostFrequent < (nbSeq >> (LL_defaultNormLog-1)))) {
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	615 FSE_buildCTable_wksp(CTable_LitLength, LL_defaultNorm, MaxLL, LL_defaultNormLog, scratchBuffer, sizeof(scratchBuffer));
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	616 LLtype = set_basic;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	617 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	618 size_t nbSeq_1 = nbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	619 const U32 tableLog = FSE_optimalTableLog(LLFSELog, nbSeq, max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	620 if (count[llCodeTable[nbSeq-1]]>1) { count[llCodeTable[nbSeq-1]]--; nbSeq_1--; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	621 FSE_normalizeCount(norm, tableLog, count, nbSeq_1, max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	622 { size_t const NCountSize = FSE_writeNCount(op, oend-op, norm, max, tableLog); /* overflow protected */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	623 if (FSE_isError(NCountSize)) return ERROR(GENERIC);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	624 op += NCountSize; }
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	625 FSE_buildCTable_wksp(CTable_LitLength, norm, max, tableLog, scratchBuffer, sizeof(scratchBuffer));
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	626 LLtype = set_compressed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	627 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	628
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	629 /* CTable for Offsets */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	630 { U32 max = MaxOff;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	631 size_t const mostFrequent = FSE_countFast_wksp(count, &max, ofCodeTable, nbSeq, zc->tmpCounters);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	632 if ((mostFrequent == nbSeq) && (nbSeq > 2)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	633 *op++ = ofCodeTable[0];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	634 FSE_buildCTable_rle(CTable_OffsetBits, (BYTE)max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	635 Offtype = set_rle;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	636 } else if ((zc->flagStaticTables) && (nbSeq < MAX_SEQ_FOR_STATIC_FSE)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	637 Offtype = set_repeat;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	638 } else if ((nbSeq < MIN_SEQ_FOR_DYNAMIC_FSE) \|\| (mostFrequent < (nbSeq >> (OF_defaultNormLog-1)))) {
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	639 FSE_buildCTable_wksp(CTable_OffsetBits, OF_defaultNorm, MaxOff, OF_defaultNormLog, scratchBuffer, sizeof(scratchBuffer));
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	640 Offtype = set_basic;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	641 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	642 size_t nbSeq_1 = nbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	643 const U32 tableLog = FSE_optimalTableLog(OffFSELog, nbSeq, max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	644 if (count[ofCodeTable[nbSeq-1]]>1) { count[ofCodeTable[nbSeq-1]]--; nbSeq_1--; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	645 FSE_normalizeCount(norm, tableLog, count, nbSeq_1, max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	646 { size_t const NCountSize = FSE_writeNCount(op, oend-op, norm, max, tableLog); /* overflow protected */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	647 if (FSE_isError(NCountSize)) return ERROR(GENERIC);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	648 op += NCountSize; }
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	649 FSE_buildCTable_wksp(CTable_OffsetBits, norm, max, tableLog, scratchBuffer, sizeof(scratchBuffer));
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	650 Offtype = set_compressed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	651 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	652
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	653 /* CTable for MatchLengths */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	654 { U32 max = MaxML;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	655 size_t const mostFrequent = FSE_countFast_wksp(count, &max, mlCodeTable, nbSeq, zc->tmpCounters);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	656 if ((mostFrequent == nbSeq) && (nbSeq > 2)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	657 op++ = mlCodeTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	658 FSE_buildCTable_rle(CTable_MatchLength, (BYTE)max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	659 MLtype = set_rle;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	660 } else if ((zc->flagStaticTables) && (nbSeq < MAX_SEQ_FOR_STATIC_FSE)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	661 MLtype = set_repeat;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	662 } else if ((nbSeq < MIN_SEQ_FOR_DYNAMIC_FSE) \|\| (mostFrequent < (nbSeq >> (ML_defaultNormLog-1)))) {
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	663 FSE_buildCTable_wksp(CTable_MatchLength, ML_defaultNorm, MaxML, ML_defaultNormLog, scratchBuffer, sizeof(scratchBuffer));
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	664 MLtype = set_basic;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	665 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	666 size_t nbSeq_1 = nbSeq;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	667 const U32 tableLog = FSE_optimalTableLog(MLFSELog, nbSeq, max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	668 if (count[mlCodeTable[nbSeq-1]]>1) { count[mlCodeTable[nbSeq-1]]--; nbSeq_1--; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	669 FSE_normalizeCount(norm, tableLog, count, nbSeq_1, max);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	670 { size_t const NCountSize = FSE_writeNCount(op, oend-op, norm, max, tableLog); /* overflow protected */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	671 if (FSE_isError(NCountSize)) return ERROR(GENERIC);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	672 op += NCountSize; }
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	673 FSE_buildCTable_wksp(CTable_MatchLength, norm, max, tableLog, scratchBuffer, sizeof(scratchBuffer));
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	674 MLtype = set_compressed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	675 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	676
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	677 *seqHead = (BYTE)((LLtype<<6) + (Offtype<<4) + (MLtype<<2));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	678 zc->flagStaticTables = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	679
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	680 /* Encoding Sequences */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	681 { BIT_CStream_t blockStream;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	682 FSE_CState_t stateMatchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	683 FSE_CState_t stateOffsetBits;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	684 FSE_CState_t stateLitLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	685
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	686 CHECK_E(BIT_initCStream(&blockStream, op, oend-op), dstSize_tooSmall); /* not enough space remaining */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	687
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	688 /* first symbols */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	689 FSE_initCState2(&stateMatchLength, CTable_MatchLength, mlCodeTable[nbSeq-1]);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	690 FSE_initCState2(&stateOffsetBits, CTable_OffsetBits, ofCodeTable[nbSeq-1]);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	691 FSE_initCState2(&stateLitLength, CTable_LitLength, llCodeTable[nbSeq-1]);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	692 BIT_addBits(&blockStream, sequences[nbSeq-1].litLength, LL_bits[llCodeTable[nbSeq-1]]);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	693 if (MEM_32bits()) BIT_flushBits(&blockStream);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	694 BIT_addBits(&blockStream, sequences[nbSeq-1].matchLength, ML_bits[mlCodeTable[nbSeq-1]]);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	695 if (MEM_32bits()) BIT_flushBits(&blockStream);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	696 BIT_addBits(&blockStream, sequences[nbSeq-1].offset, ofCodeTable[nbSeq-1]);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	697 BIT_flushBits(&blockStream);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	698
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	699 { size_t n;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	700 for (n=nbSeq-2 ; n<nbSeq ; n--) { /* intentional underflow */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	701 BYTE const llCode = llCodeTable[n];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	702 BYTE const ofCode = ofCodeTable[n];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	703 BYTE const mlCode = mlCodeTable[n];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	704 U32 const llBits = LL_bits[llCode];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	705 U32 const ofBits = ofCode; /* 32b/ / 64b*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	706 U32 const mlBits = ML_bits[mlCode];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	707 /* (7)/ / (7)*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	708 FSE_encodeSymbol(&blockStream, &stateOffsetBits, ofCode); /* 15 / / 15 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	709 FSE_encodeSymbol(&blockStream, &stateMatchLength, mlCode); /* 24 / / 24 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	710 if (MEM_32bits()) BIT_flushBits(&blockStream); /* (7)*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	711 FSE_encodeSymbol(&blockStream, &stateLitLength, llCode); /* 16 / / 33 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	712 if (MEM_32bits() \|\| (ofBits+mlBits+llBits >= 64-7-(LLFSELog+MLFSELog+OffFSELog)))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	713 BIT_flushBits(&blockStream); /* (7)*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	714 BIT_addBits(&blockStream, sequences[n].litLength, llBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	715 if (MEM_32bits() && ((llBits+mlBits)>24)) BIT_flushBits(&blockStream);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	716 BIT_addBits(&blockStream, sequences[n].matchLength, mlBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	717 if (MEM_32bits()) BIT_flushBits(&blockStream); /* (7)*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	718 BIT_addBits(&blockStream, sequences[n].offset, ofBits); /* 31 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	719 BIT_flushBits(&blockStream); /* (7)*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	720 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	721
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	722 FSE_flushCState(&blockStream, &stateMatchLength);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	723 FSE_flushCState(&blockStream, &stateOffsetBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	724 FSE_flushCState(&blockStream, &stateLitLength);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	725
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	726 { size_t const streamSize = BIT_closeCStream(&blockStream);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	727 if (streamSize==0) return ERROR(dstSize_tooSmall); /* not enough space */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	728 op += streamSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	729 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	730
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	731 /* check compressibility */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	732 _check_compressibility:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	733 { size_t const minGain = ZSTD_minGain(srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	734 size_t const maxCSize = srcSize - minGain;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	735 if ((size_t)(op-ostart) >= maxCSize) return 0; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	736
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	737 /* confirm repcodes */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	738 { int i; for (i=0; i<ZSTD_REP_NUM; i++) zc->rep[i] = zc->savedRep[i]; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	739
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	740 return op - ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	741 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	742
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	743
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	744 /*! ZSTD_storeSeq() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	745 Store a sequence (literal length, literals, offset code and match length code) into seqStore_t.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	746 `offsetCode` : distance to match, or 0 == repCode.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	747 `matchCode` : matchLength - MINMATCH
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	748 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	749 MEM_STATIC void ZSTD_storeSeq(seqStore_t* seqStorePtr, size_t litLength, const void* literals, U32 offsetCode, size_t matchCode)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	750 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	751 #if 0 /* for debug */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	752 static const BYTE* g_start = NULL;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	753 const U32 pos = (U32)((const BYTE*)literals - g_start);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	754 if (g_start==NULL) g_start = (const BYTE*)literals;
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	755 //if ((pos > 1) && (pos < 50000))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	756 printf("Cpos %6u :%5u literals & match %3u bytes at distance %6u \n",
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	757 pos, (U32)litLength, (U32)matchCode+MINMATCH, (U32)offsetCode);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	758 #endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	759 /* copy Literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	760 ZSTD_wildcopy(seqStorePtr->lit, literals, litLength);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	761 seqStorePtr->lit += litLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	762
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	763 /* literal Length */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	764 if (litLength>0xFFFF) { seqStorePtr->longLengthID = 1; seqStorePtr->longLengthPos = (U32)(seqStorePtr->sequences - seqStorePtr->sequencesStart); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	765 seqStorePtr->sequences[0].litLength = (U16)litLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	766
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	767 /* match offset */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	768 seqStorePtr->sequences[0].offset = offsetCode + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	769
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	770 /* match Length */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	771 if (matchCode>0xFFFF) { seqStorePtr->longLengthID = 2; seqStorePtr->longLengthPos = (U32)(seqStorePtr->sequences - seqStorePtr->sequencesStart); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	772 seqStorePtr->sequences[0].matchLength = (U16)matchCode;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	773
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	774 seqStorePtr->sequences++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	775 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	776
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	777
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	778 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	779 * Match length counter
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	780 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	781 static unsigned ZSTD_NbCommonBytes (register size_t val)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	782 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	783 if (MEM_isLittleEndian()) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	784 if (MEM_64bits()) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	785 # if defined(_MSC_VER) && defined(_WIN64)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	786 unsigned long r = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	787 _BitScanForward64( &r, (U64)val );
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	788 return (unsigned)(r>>3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	789 # elif defined(__GNUC__) && (__GNUC__ >= 3)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	790 return (__builtin_ctzll((U64)val) >> 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	791 # else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	792 static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	793 return DeBruijnBytePos[((U64)((val & -(long long)val) * 0x0218A392CDABBD3FULL)) >> 58];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	794 # endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	795 } else { /* 32 bits */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	796 # if defined(_MSC_VER)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	797 unsigned long r=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	798 _BitScanForward( &r, (U32)val );
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	799 return (unsigned)(r>>3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	800 # elif defined(__GNUC__) && (__GNUC__ >= 3)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	801 return (__builtin_ctz((U32)val) >> 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	802 # else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	803 static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	804 return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	805 # endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	806 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	807 } else { /* Big Endian CPU */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	808 if (MEM_64bits()) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	809 # if defined(_MSC_VER) && defined(_WIN64)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	810 unsigned long r = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	811 _BitScanReverse64( &r, val );
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	812 return (unsigned)(r>>3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	813 # elif defined(__GNUC__) && (__GNUC__ >= 3)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	814 return (__builtin_clzll(val) >> 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	815 # else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	816 unsigned r;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	817 const unsigned n32 = sizeof(size_t)4; / calculate this way due to compiler complaining in 32-bits mode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	818 if (!(val>>n32)) { r=4; } else { r=0; val>>=n32; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	819 if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	820 r += (!val);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	821 return r;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	822 # endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	823 } else { /* 32 bits */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	824 # if defined(_MSC_VER)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	825 unsigned long r = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	826 _BitScanReverse( &r, (unsigned long)val );
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	827 return (unsigned)(r>>3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	828 # elif defined(__GNUC__) && (__GNUC__ >= 3)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	829 return (__builtin_clz((U32)val) >> 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	830 # else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	831 unsigned r;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	832 if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	833 r += (!val);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	834 return r;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	835 # endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	836 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	837 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	838
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	839
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	840 static size_t ZSTD_count(const BYTE* pIn, const BYTE* pMatch, const BYTE* const pInLimit)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	841 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	842 const BYTE* const pStart = pIn;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	843 const BYTE* const pInLoopLimit = pInLimit - (sizeof(size_t)-1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	844
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	845 while (pIn < pInLoopLimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	846 size_t const diff = MEM_readST(pMatch) ^ MEM_readST(pIn);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	847 if (!diff) { pIn+=sizeof(size_t); pMatch+=sizeof(size_t); continue; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	848 pIn += ZSTD_NbCommonBytes(diff);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	849 return (size_t)(pIn - pStart);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	850 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	851 if (MEM_64bits()) if ((pIn<(pInLimit-3)) && (MEM_read32(pMatch) == MEM_read32(pIn))) { pIn+=4; pMatch+=4; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	852 if ((pIn<(pInLimit-1)) && (MEM_read16(pMatch) == MEM_read16(pIn))) { pIn+=2; pMatch+=2; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	853 if ((pIn<pInLimit) && (pMatch == pIn)) pIn++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	854 return (size_t)(pIn - pStart);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	855 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	856
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	857 /** ZSTD_count_2segments() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	858 * can count match length with `ip` & `match` in 2 different segments.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	859 * convention : on reaching mEnd, match count continue starting from iStart
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	860 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	861 static size_t ZSTD_count_2segments(const BYTE* ip, const BYTE* match, const BYTE* iEnd, const BYTE* mEnd, const BYTE* iStart)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	862 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	863 const BYTE* const vEnd = MIN( ip + (mEnd - match), iEnd);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	864 size_t const matchLength = ZSTD_count(ip, match, vEnd);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	865 if (match + matchLength != mEnd) return matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	866 return matchLength + ZSTD_count(ip+matchLength, iStart, iEnd);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	867 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	868
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	869
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	870 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	871 * Hashes
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	872 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	873 static const U32 prime3bytes = 506832829U;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	874 static U32 ZSTD_hash3(U32 u, U32 h) { return ((u << (32-24)) * prime3bytes) >> (32-h) ; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	875 MEM_STATIC size_t ZSTD_hash3Ptr(const void* ptr, U32 h) { return ZSTD_hash3(MEM_readLE32(ptr), h); } /* only in zstd_opt.h */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	876
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	877 static const U32 prime4bytes = 2654435761U;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	878 static U32 ZSTD_hash4(U32 u, U32 h) { return (u * prime4bytes) >> (32-h) ; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	879 static size_t ZSTD_hash4Ptr(const void* ptr, U32 h) { return ZSTD_hash4(MEM_read32(ptr), h); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	880
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	881 static const U64 prime5bytes = 889523592379ULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	882 static size_t ZSTD_hash5(U64 u, U32 h) { return (size_t)(((u << (64-40)) * prime5bytes) >> (64-h)) ; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	883 static size_t ZSTD_hash5Ptr(const void* p, U32 h) { return ZSTD_hash5(MEM_readLE64(p), h); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	884
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	885 static const U64 prime6bytes = 227718039650203ULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	886 static size_t ZSTD_hash6(U64 u, U32 h) { return (size_t)(((u << (64-48)) * prime6bytes) >> (64-h)) ; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	887 static size_t ZSTD_hash6Ptr(const void* p, U32 h) { return ZSTD_hash6(MEM_readLE64(p), h); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	888
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	889 static const U64 prime7bytes = 58295818150454627ULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	890 static size_t ZSTD_hash7(U64 u, U32 h) { return (size_t)(((u << (64-56)) * prime7bytes) >> (64-h)) ; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	891 static size_t ZSTD_hash7Ptr(const void* p, U32 h) { return ZSTD_hash7(MEM_readLE64(p), h); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	892
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	893 static const U64 prime8bytes = 0xCF1BBCDCB7A56463ULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	894 static size_t ZSTD_hash8(U64 u, U32 h) { return (size_t)(((u) * prime8bytes) >> (64-h)) ; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	895 static size_t ZSTD_hash8Ptr(const void* p, U32 h) { return ZSTD_hash8(MEM_readLE64(p), h); }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	896
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	897 static size_t ZSTD_hashPtr(const void* p, U32 hBits, U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	898 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	899 switch(mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	900 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	901 default:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	902 case 4: return ZSTD_hash4Ptr(p, hBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	903 case 5: return ZSTD_hash5Ptr(p, hBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	904 case 6: return ZSTD_hash6Ptr(p, hBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	905 case 7: return ZSTD_hash7Ptr(p, hBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	906 case 8: return ZSTD_hash8Ptr(p, hBits);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	907 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	908 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	909
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	910
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	911 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	912 * Fast Scan
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	913 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	914 static void ZSTD_fillHashTable (ZSTD_CCtx* zc, const void* end, const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	915 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	916 U32* const hashTable = zc->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	917 U32 const hBits = zc->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	918 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	919 const BYTE* ip = base + zc->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	920 const BYTE* const iend = ((const BYTE*)end) - HASH_READ_SIZE;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	921 const size_t fastHashFillStep = 3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	922
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	923 while(ip <= iend) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	924 hashTable[ZSTD_hashPtr(ip, hBits, mls)] = (U32)(ip - base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	925 ip += fastHashFillStep;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	926 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	927 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	928
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	929
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	930 FORCE_INLINE
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	931 void ZSTD_compressBlock_fast_generic(ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	932 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	933 const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	934 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	935 U32* const hashTable = cctx->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	936 U32 const hBits = cctx->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	937 seqStore_t* seqStorePtr = &(cctx->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	938 const BYTE* const base = cctx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	939 const BYTE* const istart = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	940 const BYTE* ip = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	941 const BYTE* anchor = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	942 const U32 lowestIndex = cctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	943 const BYTE* const lowest = base + lowestIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	944 const BYTE* const iend = istart + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	945 const BYTE* const ilimit = iend - HASH_READ_SIZE;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	946 U32 offset_1=cctx->rep[0], offset_2=cctx->rep[1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	947 U32 offsetSaved = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	948
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	949 /* init */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	950 ip += (ip==lowest);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	951 { U32 const maxRep = (U32)(ip-lowest);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	952 if (offset_2 > maxRep) offsetSaved = offset_2, offset_2 = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	953 if (offset_1 > maxRep) offsetSaved = offset_1, offset_1 = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	954 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	955
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	956 /* Main Search Loop */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	957 while (ip < ilimit) { /* < instead of <=, because repcode check at (ip+1) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	958 size_t mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	959 size_t const h = ZSTD_hashPtr(ip, hBits, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	960 U32 const current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	961 U32 const matchIndex = hashTable[h];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	962 const BYTE* match = base + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	963 hashTable[h] = current; /* update hash table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	964
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	965 if ((offset_1 > 0) & (MEM_read32(ip+1-offset_1) == MEM_read32(ip+1))) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	966 mLength = ZSTD_count(ip+1+4, ip+1+4-offset_1, iend) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	967 ip++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	968 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, 0, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	969 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	970 U32 offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	971 if ( (matchIndex <= lowestIndex) \|\| (MEM_read32(match) != MEM_read32(ip)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	972 ip += ((ip-anchor) >> g_searchStrength) + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	973 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	974 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	975 mLength = ZSTD_count(ip+4, match+4, iend) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	976 offset = (U32)(ip-match);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	977 while (((ip>anchor) & (match>lowest)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	978 offset_2 = offset_1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	979 offset_1 = offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	980
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	981 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	982 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	983
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	984 /* match found */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	985 ip += mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	986 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	987
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	988 if (ip <= ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	989 /* Fill Table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	990 hashTable[ZSTD_hashPtr(base+current+2, hBits, mls)] = current+2; /* here because current+2 could be > iend-8 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	991 hashTable[ZSTD_hashPtr(ip-2, hBits, mls)] = (U32)(ip-2-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	992 /* check immediate repcode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	993 while ( (ip <= ilimit)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	994 && ( (offset_2>0)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	995 & (MEM_read32(ip) == MEM_read32(ip - offset_2)) )) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	996 /* store sequence */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	997 size_t const rLength = ZSTD_count(ip+4, ip+4-offset_2, iend) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	998 { U32 const tmpOff = offset_2; offset_2 = offset_1; offset_1 = tmpOff; } /* swap offset_2 <=> offset_1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	999 hashTable[ZSTD_hashPtr(ip, hBits, mls)] = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1000 ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, rLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1001 ip += rLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1002 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1003 continue; /* faster when present ... (?) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1004 } } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1005
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1006 /* save reps for next block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1007 cctx->savedRep[0] = offset_1 ? offset_1 : offsetSaved;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1008 cctx->savedRep[1] = offset_2 ? offset_2 : offsetSaved;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1009
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1010 /* Last Literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1011 { size_t const lastLLSize = iend - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1012 memcpy(seqStorePtr->lit, anchor, lastLLSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1013 seqStorePtr->lit += lastLLSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1014 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1015 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1016
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1017
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1018 static void ZSTD_compressBlock_fast(ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1019 const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1020 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1021 const U32 mls = ctx->params.cParams.searchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1022 switch(mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1023 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1024 default:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1025 case 4 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1026 ZSTD_compressBlock_fast_generic(ctx, src, srcSize, 4); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1027 case 5 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1028 ZSTD_compressBlock_fast_generic(ctx, src, srcSize, 5); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1029 case 6 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1030 ZSTD_compressBlock_fast_generic(ctx, src, srcSize, 6); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1031 case 7 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1032 ZSTD_compressBlock_fast_generic(ctx, src, srcSize, 7); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1033 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1034 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1035
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1036
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1037 static void ZSTD_compressBlock_fast_extDict_generic(ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1038 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1039 const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1040 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1041 U32* hashTable = ctx->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1042 const U32 hBits = ctx->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1043 seqStore_t* seqStorePtr = &(ctx->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1044 const BYTE* const base = ctx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1045 const BYTE* const dictBase = ctx->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1046 const BYTE* const istart = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1047 const BYTE* ip = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1048 const BYTE* anchor = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1049 const U32 lowestIndex = ctx->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1050 const BYTE* const dictStart = dictBase + lowestIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1051 const U32 dictLimit = ctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1052 const BYTE* const lowPrefixPtr = base + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1053 const BYTE* const dictEnd = dictBase + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1054 const BYTE* const iend = istart + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1055 const BYTE* const ilimit = iend - 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1056 U32 offset_1=ctx->rep[0], offset_2=ctx->rep[1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1057
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1058 /* Search Loop */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1059 while (ip < ilimit) { /* < instead of <=, because (ip+1) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1060 const size_t h = ZSTD_hashPtr(ip, hBits, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1061 const U32 matchIndex = hashTable[h];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1062 const BYTE* matchBase = matchIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1063 const BYTE* match = matchBase + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1064 const U32 current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1065 const U32 repIndex = current + 1 - offset_1; /* offset_1 expected <= current +1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1066 const BYTE* repBase = repIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1067 const BYTE* repMatch = repBase + repIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1068 size_t mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1069 hashTable[h] = current; /* update hash table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1070
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1071 if ( (((U32)((dictLimit-1) - repIndex) >= 3) /* intentional underflow */ & (repIndex > lowestIndex))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1072 && (MEM_read32(repMatch) == MEM_read32(ip+1)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1073 const BYTE* repMatchEnd = repIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1074 mLength = ZSTD_count_2segments(ip+1+EQUAL_READ32, repMatch+EQUAL_READ32, iend, repMatchEnd, lowPrefixPtr) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1075 ip++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1076 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, 0, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1077 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1078 if ( (matchIndex < lowestIndex) \|\|
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1079 (MEM_read32(match) != MEM_read32(ip)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1080 ip += ((ip-anchor) >> g_searchStrength) + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1081 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1082 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1083 { const BYTE* matchEnd = matchIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1084 const BYTE* lowMatchPtr = matchIndex < dictLimit ? dictStart : lowPrefixPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1085 U32 offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1086 mLength = ZSTD_count_2segments(ip+EQUAL_READ32, match+EQUAL_READ32, iend, matchEnd, lowPrefixPtr) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1087 while (((ip>anchor) & (match>lowMatchPtr)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1088 offset = current - matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1089 offset_2 = offset_1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1090 offset_1 = offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1091 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1092 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1093
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1094 /* found a match : store it */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1095 ip += mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1096 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1097
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1098 if (ip <= ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1099 /* Fill Table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1100 hashTable[ZSTD_hashPtr(base+current+2, hBits, mls)] = current+2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1101 hashTable[ZSTD_hashPtr(ip-2, hBits, mls)] = (U32)(ip-2-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1102 /* check immediate repcode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1103 while (ip <= ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1104 U32 const current2 = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1105 U32 const repIndex2 = current2 - offset_2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1106 const BYTE* repMatch2 = repIndex2 < dictLimit ? dictBase + repIndex2 : base + repIndex2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1107 if ( (((U32)((dictLimit-1) - repIndex2) >= 3) & (repIndex2 > lowestIndex)) /* intentional overflow */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1108 && (MEM_read32(repMatch2) == MEM_read32(ip)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1109 const BYTE* const repEnd2 = repIndex2 < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1110 size_t repLength2 = ZSTD_count_2segments(ip+EQUAL_READ32, repMatch2+EQUAL_READ32, iend, repEnd2, lowPrefixPtr) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1111 U32 tmpOffset = offset_2; offset_2 = offset_1; offset_1 = tmpOffset; /* swap offset_2 <=> offset_1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1112 ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, repLength2-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1113 hashTable[ZSTD_hashPtr(ip, hBits, mls)] = current2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1114 ip += repLength2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1115 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1116 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1117 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1118 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1119 } } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1120
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1121 /* save reps for next block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1122 ctx->savedRep[0] = offset_1; ctx->savedRep[1] = offset_2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1123
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1124 /* Last Literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1125 { size_t const lastLLSize = iend - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1126 memcpy(seqStorePtr->lit, anchor, lastLLSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1127 seqStorePtr->lit += lastLLSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1128 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1129 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1130
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1131
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1132 static void ZSTD_compressBlock_fast_extDict(ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1133 const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1134 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1135 U32 const mls = ctx->params.cParams.searchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1136 switch(mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1137 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1138 default:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1139 case 4 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1140 ZSTD_compressBlock_fast_extDict_generic(ctx, src, srcSize, 4); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1141 case 5 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1142 ZSTD_compressBlock_fast_extDict_generic(ctx, src, srcSize, 5); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1143 case 6 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1144 ZSTD_compressBlock_fast_extDict_generic(ctx, src, srcSize, 6); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1145 case 7 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1146 ZSTD_compressBlock_fast_extDict_generic(ctx, src, srcSize, 7); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1147 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1148 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1149
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1150
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1151 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1152 * Double Fast
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1153 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1154 static void ZSTD_fillDoubleHashTable (ZSTD_CCtx* cctx, const void* end, const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1155 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1156 U32* const hashLarge = cctx->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1157 U32 const hBitsL = cctx->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1158 U32* const hashSmall = cctx->chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1159 U32 const hBitsS = cctx->params.cParams.chainLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1160 const BYTE* const base = cctx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1161 const BYTE* ip = base + cctx->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1162 const BYTE* const iend = ((const BYTE*)end) - HASH_READ_SIZE;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1163 const size_t fastHashFillStep = 3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1164
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1165 while(ip <= iend) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1166 hashSmall[ZSTD_hashPtr(ip, hBitsS, mls)] = (U32)(ip - base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1167 hashLarge[ZSTD_hashPtr(ip, hBitsL, 8)] = (U32)(ip - base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1168 ip += fastHashFillStep;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1169 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1170 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1171
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1172
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1173 FORCE_INLINE
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1174 void ZSTD_compressBlock_doubleFast_generic(ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1175 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1176 const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1177 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1178 U32* const hashLong = cctx->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1179 const U32 hBitsL = cctx->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1180 U32* const hashSmall = cctx->chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1181 const U32 hBitsS = cctx->params.cParams.chainLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1182 seqStore_t* seqStorePtr = &(cctx->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1183 const BYTE* const base = cctx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1184 const BYTE* const istart = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1185 const BYTE* ip = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1186 const BYTE* anchor = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1187 const U32 lowestIndex = cctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1188 const BYTE* const lowest = base + lowestIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1189 const BYTE* const iend = istart + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1190 const BYTE* const ilimit = iend - HASH_READ_SIZE;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1191 U32 offset_1=cctx->rep[0], offset_2=cctx->rep[1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1192 U32 offsetSaved = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1193
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1194 /* init */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1195 ip += (ip==lowest);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1196 { U32 const maxRep = (U32)(ip-lowest);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1197 if (offset_2 > maxRep) offsetSaved = offset_2, offset_2 = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1198 if (offset_1 > maxRep) offsetSaved = offset_1, offset_1 = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1199 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1200
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1201 /* Main Search Loop */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1202 while (ip < ilimit) { /* < instead of <=, because repcode check at (ip+1) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1203 size_t mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1204 size_t const h2 = ZSTD_hashPtr(ip, hBitsL, 8);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1205 size_t const h = ZSTD_hashPtr(ip, hBitsS, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1206 U32 const current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1207 U32 const matchIndexL = hashLong[h2];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1208 U32 const matchIndexS = hashSmall[h];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1209 const BYTE* matchLong = base + matchIndexL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1210 const BYTE* match = base + matchIndexS;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1211 hashLong[h2] = hashSmall[h] = current; /* update hash tables */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1212
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1213 if ((offset_1 > 0) & (MEM_read32(ip+1-offset_1) == MEM_read32(ip+1))) { /* note : by construction, offset_1 <= current */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1214 mLength = ZSTD_count(ip+1+4, ip+1+4-offset_1, iend) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1215 ip++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1216 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, 0, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1217 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1218 U32 offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1219 if ( (matchIndexL > lowestIndex) && (MEM_read64(matchLong) == MEM_read64(ip)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1220 mLength = ZSTD_count(ip+8, matchLong+8, iend) + 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1221 offset = (U32)(ip-matchLong);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1222 while (((ip>anchor) & (matchLong>lowest)) && (ip[-1] == matchLong[-1])) { ip--; matchLong--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1223 } else if ( (matchIndexS > lowestIndex) && (MEM_read32(match) == MEM_read32(ip)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1224 size_t const h3 = ZSTD_hashPtr(ip+1, hBitsL, 8);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1225 U32 const matchIndex3 = hashLong[h3];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1226 const BYTE* match3 = base + matchIndex3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1227 hashLong[h3] = current + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1228 if ( (matchIndex3 > lowestIndex) && (MEM_read64(match3) == MEM_read64(ip+1)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1229 mLength = ZSTD_count(ip+9, match3+8, iend) + 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1230 ip++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1231 offset = (U32)(ip-match3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1232 while (((ip>anchor) & (match3>lowest)) && (ip[-1] == match3[-1])) { ip--; match3--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1233 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1234 mLength = ZSTD_count(ip+4, match+4, iend) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1235 offset = (U32)(ip-match);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1236 while (((ip>anchor) & (match>lowest)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1237 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1238 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1239 ip += ((ip-anchor) >> g_searchStrength) + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1240 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1241 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1242
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1243 offset_2 = offset_1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1244 offset_1 = offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1245
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1246 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1247 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1248
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1249 /* match found */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1250 ip += mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1251 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1252
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1253 if (ip <= ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1254 /* Fill Table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1255 hashLong[ZSTD_hashPtr(base+current+2, hBitsL, 8)] =
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1256 hashSmall[ZSTD_hashPtr(base+current+2, hBitsS, mls)] = current+2; /* here because current+2 could be > iend-8 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1257 hashLong[ZSTD_hashPtr(ip-2, hBitsL, 8)] =
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1258 hashSmall[ZSTD_hashPtr(ip-2, hBitsS, mls)] = (U32)(ip-2-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1259
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1260 /* check immediate repcode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1261 while ( (ip <= ilimit)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1262 && ( (offset_2>0)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1263 & (MEM_read32(ip) == MEM_read32(ip - offset_2)) )) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1264 /* store sequence */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1265 size_t const rLength = ZSTD_count(ip+4, ip+4-offset_2, iend) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1266 { U32 const tmpOff = offset_2; offset_2 = offset_1; offset_1 = tmpOff; } /* swap offset_2 <=> offset_1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1267 hashSmall[ZSTD_hashPtr(ip, hBitsS, mls)] = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1268 hashLong[ZSTD_hashPtr(ip, hBitsL, 8)] = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1269 ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, rLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1270 ip += rLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1271 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1272 continue; /* faster when present ... (?) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1273 } } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1274
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1275 /* save reps for next block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1276 cctx->savedRep[0] = offset_1 ? offset_1 : offsetSaved;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1277 cctx->savedRep[1] = offset_2 ? offset_2 : offsetSaved;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1278
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1279 /* Last Literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1280 { size_t const lastLLSize = iend - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1281 memcpy(seqStorePtr->lit, anchor, lastLLSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1282 seqStorePtr->lit += lastLLSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1283 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1284 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1285
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1286
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1287 static void ZSTD_compressBlock_doubleFast(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1288 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1289 const U32 mls = ctx->params.cParams.searchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1290 switch(mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1291 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1292 default:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1293 case 4 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1294 ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 4); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1295 case 5 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1296 ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 5); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1297 case 6 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1298 ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 6); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1299 case 7 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1300 ZSTD_compressBlock_doubleFast_generic(ctx, src, srcSize, 7); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1301 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1302 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1303
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1304
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1305 static void ZSTD_compressBlock_doubleFast_extDict_generic(ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1306 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1307 const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1308 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1309 U32* const hashLong = ctx->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1310 U32 const hBitsL = ctx->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1311 U32* const hashSmall = ctx->chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1312 U32 const hBitsS = ctx->params.cParams.chainLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1313 seqStore_t* seqStorePtr = &(ctx->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1314 const BYTE* const base = ctx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1315 const BYTE* const dictBase = ctx->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1316 const BYTE* const istart = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1317 const BYTE* ip = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1318 const BYTE* anchor = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1319 const U32 lowestIndex = ctx->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1320 const BYTE* const dictStart = dictBase + lowestIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1321 const U32 dictLimit = ctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1322 const BYTE* const lowPrefixPtr = base + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1323 const BYTE* const dictEnd = dictBase + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1324 const BYTE* const iend = istart + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1325 const BYTE* const ilimit = iend - 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1326 U32 offset_1=ctx->rep[0], offset_2=ctx->rep[1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1327
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1328 /* Search Loop */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1329 while (ip < ilimit) { /* < instead of <=, because (ip+1) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1330 const size_t hSmall = ZSTD_hashPtr(ip, hBitsS, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1331 const U32 matchIndex = hashSmall[hSmall];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1332 const BYTE* matchBase = matchIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1333 const BYTE* match = matchBase + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1334
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1335 const size_t hLong = ZSTD_hashPtr(ip, hBitsL, 8);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1336 const U32 matchLongIndex = hashLong[hLong];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1337 const BYTE* matchLongBase = matchLongIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1338 const BYTE* matchLong = matchLongBase + matchLongIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1339
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1340 const U32 current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1341 const U32 repIndex = current + 1 - offset_1; /* offset_1 expected <= current +1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1342 const BYTE* repBase = repIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1343 const BYTE* repMatch = repBase + repIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1344 size_t mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1345 hashSmall[hSmall] = hashLong[hLong] = current; /* update hash table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1346
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1347 if ( (((U32)((dictLimit-1) - repIndex) >= 3) /* intentional underflow */ & (repIndex > lowestIndex))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1348 && (MEM_read32(repMatch) == MEM_read32(ip+1)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1349 const BYTE* repMatchEnd = repIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1350 mLength = ZSTD_count_2segments(ip+1+4, repMatch+4, iend, repMatchEnd, lowPrefixPtr) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1351 ip++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1352 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, 0, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1353 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1354 if ((matchLongIndex > lowestIndex) && (MEM_read64(matchLong) == MEM_read64(ip))) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1355 const BYTE* matchEnd = matchLongIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1356 const BYTE* lowMatchPtr = matchLongIndex < dictLimit ? dictStart : lowPrefixPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1357 U32 offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1358 mLength = ZSTD_count_2segments(ip+8, matchLong+8, iend, matchEnd, lowPrefixPtr) + 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1359 offset = current - matchLongIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1360 while (((ip>anchor) & (matchLong>lowMatchPtr)) && (ip[-1] == matchLong[-1])) { ip--; matchLong--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1361 offset_2 = offset_1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1362 offset_1 = offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1363 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1364
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1365 } else if ((matchIndex > lowestIndex) && (MEM_read32(match) == MEM_read32(ip))) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1366 size_t const h3 = ZSTD_hashPtr(ip+1, hBitsL, 8);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1367 U32 const matchIndex3 = hashLong[h3];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1368 const BYTE* const match3Base = matchIndex3 < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1369 const BYTE* match3 = match3Base + matchIndex3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1370 U32 offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1371 hashLong[h3] = current + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1372 if ( (matchIndex3 > lowestIndex) && (MEM_read64(match3) == MEM_read64(ip+1)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1373 const BYTE* matchEnd = matchIndex3 < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1374 const BYTE* lowMatchPtr = matchIndex3 < dictLimit ? dictStart : lowPrefixPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1375 mLength = ZSTD_count_2segments(ip+9, match3+8, iend, matchEnd, lowPrefixPtr) + 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1376 ip++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1377 offset = current+1 - matchIndex3;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1378 while (((ip>anchor) & (match3>lowMatchPtr)) && (ip[-1] == match3[-1])) { ip--; match3--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1379 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1380 const BYTE* matchEnd = matchIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1381 const BYTE* lowMatchPtr = matchIndex < dictLimit ? dictStart : lowPrefixPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1382 mLength = ZSTD_count_2segments(ip+4, match+4, iend, matchEnd, lowPrefixPtr) + 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1383 offset = current - matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1384 while (((ip>anchor) & (match>lowMatchPtr)) && (ip[-1] == match[-1])) { ip--; match--; mLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1385 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1386 offset_2 = offset_1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1387 offset_1 = offset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1388 ZSTD_storeSeq(seqStorePtr, ip-anchor, anchor, offset + ZSTD_REP_MOVE, mLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1389
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1390 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1391 ip += ((ip-anchor) >> g_searchStrength) + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1392 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1393 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1394
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1395 /* found a match : store it */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1396 ip += mLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1397 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1398
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1399 if (ip <= ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1400 /* Fill Table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1401 hashSmall[ZSTD_hashPtr(base+current+2, hBitsS, mls)] = current+2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1402 hashLong[ZSTD_hashPtr(base+current+2, hBitsL, 8)] = current+2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1403 hashSmall[ZSTD_hashPtr(ip-2, hBitsS, mls)] = (U32)(ip-2-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1404 hashLong[ZSTD_hashPtr(ip-2, hBitsL, 8)] = (U32)(ip-2-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1405 /* check immediate repcode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1406 while (ip <= ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1407 U32 const current2 = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1408 U32 const repIndex2 = current2 - offset_2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1409 const BYTE* repMatch2 = repIndex2 < dictLimit ? dictBase + repIndex2 : base + repIndex2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1410 if ( (((U32)((dictLimit-1) - repIndex2) >= 3) & (repIndex2 > lowestIndex)) /* intentional overflow */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1411 && (MEM_read32(repMatch2) == MEM_read32(ip)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1412 const BYTE* const repEnd2 = repIndex2 < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1413 size_t const repLength2 = ZSTD_count_2segments(ip+EQUAL_READ32, repMatch2+EQUAL_READ32, iend, repEnd2, lowPrefixPtr) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1414 U32 tmpOffset = offset_2; offset_2 = offset_1; offset_1 = tmpOffset; /* swap offset_2 <=> offset_1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1415 ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, repLength2-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1416 hashSmall[ZSTD_hashPtr(ip, hBitsS, mls)] = current2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1417 hashLong[ZSTD_hashPtr(ip, hBitsL, 8)] = current2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1418 ip += repLength2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1419 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1420 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1421 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1422 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1423 } } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1424
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1425 /* save reps for next block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1426 ctx->savedRep[0] = offset_1; ctx->savedRep[1] = offset_2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1427
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1428 /* Last Literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1429 { size_t const lastLLSize = iend - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1430 memcpy(seqStorePtr->lit, anchor, lastLLSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1431 seqStorePtr->lit += lastLLSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1432 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1433 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1434
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1435
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1436 static void ZSTD_compressBlock_doubleFast_extDict(ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1437 const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1438 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1439 U32 const mls = ctx->params.cParams.searchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1440 switch(mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1441 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1442 default:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1443 case 4 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1444 ZSTD_compressBlock_doubleFast_extDict_generic(ctx, src, srcSize, 4); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1445 case 5 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1446 ZSTD_compressBlock_doubleFast_extDict_generic(ctx, src, srcSize, 5); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1447 case 6 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1448 ZSTD_compressBlock_doubleFast_extDict_generic(ctx, src, srcSize, 6); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1449 case 7 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1450 ZSTD_compressBlock_doubleFast_extDict_generic(ctx, src, srcSize, 7); return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1451 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1452 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1453
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1454
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1455 /-************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1456 * Binary Tree search
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1457 ***************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1458 /** ZSTD_insertBt1() : add one or multiple positions to tree.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1459 * ip : assumed <= iend-8 .
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1460 * @return : nb of positions added */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1461 static U32 ZSTD_insertBt1(ZSTD_CCtx* zc, const BYTE* const ip, const U32 mls, const BYTE* const iend, U32 nbCompares,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1462 U32 extDict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1463 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1464 U32* const hashTable = zc->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1465 U32 const hashLog = zc->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1466 size_t const h = ZSTD_hashPtr(ip, hashLog, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1467 U32* const bt = zc->chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1468 U32 const btLog = zc->params.cParams.chainLog - 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1469 U32 const btMask = (1 << btLog) - 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1470 U32 matchIndex = hashTable[h];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1471 size_t commonLengthSmaller=0, commonLengthLarger=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1472 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1473 const BYTE* const dictBase = zc->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1474 const U32 dictLimit = zc->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1475 const BYTE* const dictEnd = dictBase + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1476 const BYTE* const prefixStart = base + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1477 const BYTE* match;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1478 const U32 current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1479 const U32 btLow = btMask >= current ? 0 : current - btMask;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1480 U32* smallerPtr = bt + 2*(current&btMask);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1481 U32* largerPtr = smallerPtr + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1482 U32 dummy32; /* to be nullified at the end */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1483 U32 const windowLow = zc->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1484 U32 matchEndIdx = current+8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1485 size_t bestLength = 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1486 #ifdef ZSTD_C_PREDICT
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1487 U32 predictedSmall = (bt + 2((current-1)&btMask) + 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1488 U32 predictedLarge = (bt + 2((current-1)&btMask) + 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1489 predictedSmall += (predictedSmall>0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1490 predictedLarge += (predictedLarge>0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1491 #endif /* ZSTD_C_PREDICT */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1492
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1493 hashTable[h] = current; /* Update Hash Table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1494
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1495 while (nbCompares-- && (matchIndex > windowLow)) {
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	1496 U32* const nextPtr = bt + 2*(matchIndex & btMask);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1497 size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	1498
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1499 #ifdef ZSTD_C_PREDICT /* note : can create issues when hlog small <= 11 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1500 const U32* predictPtr = bt + 2((matchIndex-1) & btMask); / written this way, as bt is a roll buffer */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1501 if (matchIndex == predictedSmall) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1502 /* no need to check length, result known */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1503 *smallerPtr = matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1504 if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1505 smallerPtr = nextPtr+1; /* new "smaller" => larger of match */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1506 matchIndex = nextPtr[1]; /* new matchIndex larger than previous (closer to current) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1507 predictedSmall = predictPtr[1] + (predictPtr[1]>0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1508 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1509 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1510 if (matchIndex == predictedLarge) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1511 *largerPtr = matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1512 if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1513 largerPtr = nextPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1514 matchIndex = nextPtr[0];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1515 predictedLarge = predictPtr[0] + (predictPtr[0]>0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1516 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1517 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1518 #endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1519 if ((!extDict) \|\| (matchIndex+matchLength >= dictLimit)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1520 match = base + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1521 if (match[matchLength] == ip[matchLength])
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1522 matchLength += ZSTD_count(ip+matchLength+1, match+matchLength+1, iend) +1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1523 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1524 match = dictBase + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1525 matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1526 if (matchIndex+matchLength >= dictLimit)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1527 match = base + matchIndex; /* to prepare for next usage of match[matchLength] */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1528 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1529
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1530 if (matchLength > bestLength) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1531 bestLength = matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1532 if (matchLength > matchEndIdx - matchIndex)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1533 matchEndIdx = matchIndex + (U32)matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1534 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1535
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1536 if (ip+matchLength == iend) /* equal : no way to know if inf or sup */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1537 break; /* drop , to guarantee consistency ; miss a bit of compression, but other solutions can corrupt the tree */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1538
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1539 if (match[matchLength] < ip[matchLength]) { /* necessarily within correct buffer */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1540 /* match is smaller than current */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1541 smallerPtr = matchIndex; / update smaller idx */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1542 commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1543 if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1544 smallerPtr = nextPtr+1; /* new "smaller" => larger of match */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1545 matchIndex = nextPtr[1]; /* new matchIndex larger than previous (closer to current) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1546 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1547 /* match is larger than current */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1548 *largerPtr = matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1549 commonLengthLarger = matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1550 if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1551 largerPtr = nextPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1552 matchIndex = nextPtr[0];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1553 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1554
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1555 smallerPtr = largerPtr = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1556 if (bestLength > 384) return MIN(192, (U32)(bestLength - 384)); /* speed optimization */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1557 if (matchEndIdx > current + 8) return matchEndIdx - current - 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1558 return 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1559 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1560
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1561
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1562 static size_t ZSTD_insertBtAndFindBestMatch (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1563 ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1564 const BYTE* const ip, const BYTE* const iend,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1565 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1566 U32 nbCompares, const U32 mls,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1567 U32 extDict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1568 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1569 U32* const hashTable = zc->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1570 U32 const hashLog = zc->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1571 size_t const h = ZSTD_hashPtr(ip, hashLog, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1572 U32* const bt = zc->chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1573 U32 const btLog = zc->params.cParams.chainLog - 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1574 U32 const btMask = (1 << btLog) - 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1575 U32 matchIndex = hashTable[h];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1576 size_t commonLengthSmaller=0, commonLengthLarger=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1577 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1578 const BYTE* const dictBase = zc->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1579 const U32 dictLimit = zc->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1580 const BYTE* const dictEnd = dictBase + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1581 const BYTE* const prefixStart = base + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1582 const U32 current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1583 const U32 btLow = btMask >= current ? 0 : current - btMask;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1584 const U32 windowLow = zc->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1585 U32* smallerPtr = bt + 2*(current&btMask);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1586 U32* largerPtr = bt + 2*(current&btMask) + 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1587 U32 matchEndIdx = current+8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1588 U32 dummy32; /* to be nullified at the end */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1589 size_t bestLength = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1590
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1591 hashTable[h] = current; /* Update Hash Table */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1592
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1593 while (nbCompares-- && (matchIndex > windowLow)) {
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	1594 U32* const nextPtr = bt + 2*(matchIndex & btMask);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1595 size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1596 const BYTE* match;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1597
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1598 if ((!extDict) \|\| (matchIndex+matchLength >= dictLimit)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1599 match = base + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1600 if (match[matchLength] == ip[matchLength])
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1601 matchLength += ZSTD_count(ip+matchLength+1, match+matchLength+1, iend) +1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1602 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1603 match = dictBase + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1604 matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iend, dictEnd, prefixStart);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1605 if (matchIndex+matchLength >= dictLimit)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1606 match = base + matchIndex; /* to prepare for next usage of match[matchLength] */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1607 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1608
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1609 if (matchLength > bestLength) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1610 if (matchLength > matchEndIdx - matchIndex)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1611 matchEndIdx = matchIndex + (U32)matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1612 if ( (4*(int)(matchLength-bestLength)) > (int)(ZSTD_highbit32(current-matchIndex+1) - ZSTD_highbit32((U32)offsetPtr[0]+1)) )
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1613 bestLength = matchLength, *offsetPtr = ZSTD_REP_MOVE + current - matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1614 if (ip+matchLength == iend) /* equal : no way to know if inf or sup */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1615 break; /* drop, to guarantee consistency (miss a little bit of compression) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1616 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1617
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1618 if (match[matchLength] < ip[matchLength]) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1619 /* match is smaller than current */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1620 smallerPtr = matchIndex; / update smaller idx */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1621 commonLengthSmaller = matchLength; /* all smaller will now have at least this guaranteed common length */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1622 if (matchIndex <= btLow) { smallerPtr=&dummy32; break; } /* beyond tree size, stop the search */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1623 smallerPtr = nextPtr+1; /* new "smaller" => larger of match */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1624 matchIndex = nextPtr[1]; /* new matchIndex larger than previous (closer to current) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1625 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1626 /* match is larger than current */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1627 *largerPtr = matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1628 commonLengthLarger = matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1629 if (matchIndex <= btLow) { largerPtr=&dummy32; break; } /* beyond tree size, stop the search */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1630 largerPtr = nextPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1631 matchIndex = nextPtr[0];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1632 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1633
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1634 smallerPtr = largerPtr = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1635
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1636 zc->nextToUpdate = (matchEndIdx > current + 8) ? matchEndIdx - 8 : current+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1637 return bestLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1638 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1639
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1640
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1641 static void ZSTD_updateTree(ZSTD_CCtx* zc, const BYTE* const ip, const BYTE* const iend, const U32 nbCompares, const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1642 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1643 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1644 const U32 target = (U32)(ip - base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1645 U32 idx = zc->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1646
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1647 while(idx < target)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1648 idx += ZSTD_insertBt1(zc, base+idx, mls, iend, nbCompares, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1649 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1650
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1651 /** ZSTD_BtFindBestMatch() : Tree updater, providing best match */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1652 static size_t ZSTD_BtFindBestMatch (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1653 ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1654 const BYTE* const ip, const BYTE* const iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1655 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1656 const U32 maxNbAttempts, const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1657 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1658 if (ip < zc->base + zc->nextToUpdate) return 0; /* skipped area */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1659 ZSTD_updateTree(zc, ip, iLimit, maxNbAttempts, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1660 return ZSTD_insertBtAndFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, mls, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1661 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1662
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1663
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1664 static size_t ZSTD_BtFindBestMatch_selectMLS (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1665 ZSTD_CCtx* zc, /* Index table will be updated */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1666 const BYTE* ip, const BYTE* const iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1667 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1668 const U32 maxNbAttempts, const U32 matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1669 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1670 switch(matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1671 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1672 default :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1673 case 4 : return ZSTD_BtFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1674 case 5 : return ZSTD_BtFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1675 case 6 : return ZSTD_BtFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1676 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1677 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1678
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1679
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1680 static void ZSTD_updateTree_extDict(ZSTD_CCtx* zc, const BYTE* const ip, const BYTE* const iend, const U32 nbCompares, const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1681 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1682 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1683 const U32 target = (U32)(ip - base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1684 U32 idx = zc->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1685
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1686 while (idx < target) idx += ZSTD_insertBt1(zc, base+idx, mls, iend, nbCompares, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1687 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1688
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1689
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1690 /** Tree updater, providing best match */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1691 static size_t ZSTD_BtFindBestMatch_extDict (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1692 ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1693 const BYTE* const ip, const BYTE* const iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1694 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1695 const U32 maxNbAttempts, const U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1696 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1697 if (ip < zc->base + zc->nextToUpdate) return 0; /* skipped area */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1698 ZSTD_updateTree_extDict(zc, ip, iLimit, maxNbAttempts, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1699 return ZSTD_insertBtAndFindBestMatch(zc, ip, iLimit, offsetPtr, maxNbAttempts, mls, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1700 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1701
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1702
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1703 static size_t ZSTD_BtFindBestMatch_selectMLS_extDict (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1704 ZSTD_CCtx* zc, /* Index table will be updated */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1705 const BYTE* ip, const BYTE* const iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1706 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1707 const U32 maxNbAttempts, const U32 matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1708 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1709 switch(matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1710 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1711 default :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1712 case 4 : return ZSTD_BtFindBestMatch_extDict(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1713 case 5 : return ZSTD_BtFindBestMatch_extDict(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1714 case 6 : return ZSTD_BtFindBestMatch_extDict(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1715 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1716 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1717
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1718
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1719
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1720 /* *********************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1721 * Hash Chain
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1722 ***********************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1723 #define NEXT_IN_CHAIN(d, mask) chainTable[(d) & mask]
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1724
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1725 /* Update chains up to ip (excluded)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1726 Assumption : always within prefix (ie. not within extDict) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1727 FORCE_INLINE
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1728 U32 ZSTD_insertAndFindFirstIndex (ZSTD_CCtx* zc, const BYTE* ip, U32 mls)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1729 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1730 U32* const hashTable = zc->hashTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1731 const U32 hashLog = zc->params.cParams.hashLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1732 U32* const chainTable = zc->chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1733 const U32 chainMask = (1 << zc->params.cParams.chainLog) - 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1734 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1735 const U32 target = (U32)(ip - base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1736 U32 idx = zc->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1737
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1738 while(idx < target) { /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1739 size_t const h = ZSTD_hashPtr(base+idx, hashLog, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1740 NEXT_IN_CHAIN(idx, chainMask) = hashTable[h];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1741 hashTable[h] = idx;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1742 idx++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1743 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1744
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1745 zc->nextToUpdate = target;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1746 return hashTable[ZSTD_hashPtr(ip, hashLog, mls)];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1747 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1748
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1749
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1750
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1751 FORCE_INLINE /* inlining is important to hardwire a hot branch (template emulation) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1752 size_t ZSTD_HcFindBestMatch_generic (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1753 ZSTD_CCtx* zc, /* Index table will be updated */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1754 const BYTE* const ip, const BYTE* const iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1755 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1756 const U32 maxNbAttempts, const U32 mls, const U32 extDict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1757 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1758 U32* const chainTable = zc->chainTable;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1759 const U32 chainSize = (1 << zc->params.cParams.chainLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1760 const U32 chainMask = chainSize-1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1761 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1762 const BYTE* const dictBase = zc->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1763 const U32 dictLimit = zc->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1764 const BYTE* const prefixStart = base + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1765 const BYTE* const dictEnd = dictBase + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1766 const U32 lowLimit = zc->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1767 const U32 current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1768 const U32 minChain = current > chainSize ? current - chainSize : 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1769 int nbAttempts=maxNbAttempts;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1770 size_t ml=EQUAL_READ32-1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1771
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1772 /* HC4 match finder */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1773 U32 matchIndex = ZSTD_insertAndFindFirstIndex (zc, ip, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1774
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1775 for ( ; (matchIndex>lowLimit) & (nbAttempts>0) ; nbAttempts--) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1776 const BYTE* match;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1777 size_t currentMl=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1778 if ((!extDict) \|\| matchIndex >= dictLimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1779 match = base + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1780 if (match[ml] == ip[ml]) /* potentially better */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1781 currentMl = ZSTD_count(ip, match, iLimit);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1782 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1783 match = dictBase + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1784 if (MEM_read32(match) == MEM_read32(ip)) /* assumption : matchIndex <= dictLimit-4 (by table construction) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1785 currentMl = ZSTD_count_2segments(ip+EQUAL_READ32, match+EQUAL_READ32, iLimit, dictEnd, prefixStart) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1786 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1787
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1788 /* save best solution */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1789 if (currentMl > ml) { ml = currentMl; offsetPtr = current - matchIndex + ZSTD_REP_MOVE; if (ip+currentMl == iLimit) break; / best possible, and avoid read overflow*/ }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1790
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1791 if (matchIndex <= minChain) break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1792 matchIndex = NEXT_IN_CHAIN(matchIndex, chainMask);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1793 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1794
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1795 return ml;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1796 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1797
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1798
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1799 FORCE_INLINE size_t ZSTD_HcFindBestMatch_selectMLS (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1800 ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1801 const BYTE* ip, const BYTE* const iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1802 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1803 const U32 maxNbAttempts, const U32 matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1804 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1805 switch(matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1806 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1807 default :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1808 case 4 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1809 case 5 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1810 case 6 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1811 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1812 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1813
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1814
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1815 FORCE_INLINE size_t ZSTD_HcFindBestMatch_extDict_selectMLS (
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1816 ZSTD_CCtx* zc,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1817 const BYTE* ip, const BYTE* const iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1818 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1819 const U32 maxNbAttempts, const U32 matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1820 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1821 switch(matchLengthSearch)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1822 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1823 default :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1824 case 4 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 4, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1825 case 5 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 5, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1826 case 6 : return ZSTD_HcFindBestMatch_generic(zc, ip, iLimit, offsetPtr, maxNbAttempts, 6, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1827 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1828 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1829
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1830
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1831 /* *******************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1832 * Common parser - lazy strategy
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1833 *********************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1834 FORCE_INLINE
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1835 void ZSTD_compressBlock_lazy_generic(ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1836 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1837 const U32 searchMethod, const U32 depth)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1838 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1839 seqStore_t* seqStorePtr = &(ctx->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1840 const BYTE* const istart = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1841 const BYTE* ip = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1842 const BYTE* anchor = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1843 const BYTE* const iend = istart + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1844 const BYTE* const ilimit = iend - 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1845 const BYTE* const base = ctx->base + ctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1846
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1847 U32 const maxSearches = 1 << ctx->params.cParams.searchLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1848 U32 const mls = ctx->params.cParams.searchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1849
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1850 typedef size_t (searchMax_f)(ZSTD_CCtx zc, const BYTE* ip, const BYTE* iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1851 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1852 U32 maxNbAttempts, U32 matchLengthSearch);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1853 searchMax_f const searchMax = searchMethod ? ZSTD_BtFindBestMatch_selectMLS : ZSTD_HcFindBestMatch_selectMLS;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1854 U32 offset_1 = ctx->rep[0], offset_2 = ctx->rep[1], savedOffset=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1855
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1856 /* init */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1857 ip += (ip==base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1858 ctx->nextToUpdate3 = ctx->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1859 { U32 const maxRep = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1860 if (offset_2 > maxRep) savedOffset = offset_2, offset_2 = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1861 if (offset_1 > maxRep) savedOffset = offset_1, offset_1 = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1862 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1863
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1864 /* Match Loop */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1865 while (ip < ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1866 size_t matchLength=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1867 size_t offset=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1868 const BYTE* start=ip+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1869
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1870 /* check repCode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1871 if ((offset_1>0) & (MEM_read32(ip+1) == MEM_read32(ip+1 - offset_1))) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1872 /* repcode : we take it */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1873 matchLength = ZSTD_count(ip+1+EQUAL_READ32, ip+1+EQUAL_READ32-offset_1, iend) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1874 if (depth==0) goto _storeSequence;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1875 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1876
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1877 /* first search (depth 0) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1878 { size_t offsetFound = 99999999;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1879 size_t const ml2 = searchMax(ctx, ip, iend, &offsetFound, maxSearches, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1880 if (ml2 > matchLength)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1881 matchLength = ml2, start = ip, offset=offsetFound;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1882 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1883
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1884 if (matchLength < EQUAL_READ32) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1885 ip += ((ip-anchor) >> g_searchStrength) + 1; /* jump faster over incompressible sections */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1886 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1887 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1888
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1889 /* let's try to find a better solution */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1890 if (depth>=1)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1891 while (ip<ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1892 ip ++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1893 if ((offset) && ((offset_1>0) & (MEM_read32(ip) == MEM_read32(ip - offset_1)))) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1894 size_t const mlRep = ZSTD_count(ip+EQUAL_READ32, ip+EQUAL_READ32-offset_1, iend) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1895 int const gain2 = (int)(mlRep * 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1896 int const gain1 = (int)(matchLength*3 - ZSTD_highbit32((U32)offset+1) + 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1897 if ((mlRep >= EQUAL_READ32) && (gain2 > gain1))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1898 matchLength = mlRep, offset = 0, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1899 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1900 { size_t offset2=99999999;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1901 size_t const ml2 = searchMax(ctx, ip, iend, &offset2, maxSearches, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1902 int const gain2 = (int)(ml24 - ZSTD_highbit32((U32)offset2+1)); / raw approx */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1903 int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1904 if ((ml2 >= EQUAL_READ32) && (gain2 > gain1)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1905 matchLength = ml2, offset = offset2, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1906 continue; /* search a better one */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1907 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1908
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1909 /* let's find an even better one */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1910 if ((depth==2) && (ip<ilimit)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1911 ip ++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1912 if ((offset) && ((offset_1>0) & (MEM_read32(ip) == MEM_read32(ip - offset_1)))) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1913 size_t const ml2 = ZSTD_count(ip+EQUAL_READ32, ip+EQUAL_READ32-offset_1, iend) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1914 int const gain2 = (int)(ml2 * 4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1915 int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1916 if ((ml2 >= EQUAL_READ32) && (gain2 > gain1))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1917 matchLength = ml2, offset = 0, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1918 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1919 { size_t offset2=99999999;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1920 size_t const ml2 = searchMax(ctx, ip, iend, &offset2, maxSearches, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1921 int const gain2 = (int)(ml24 - ZSTD_highbit32((U32)offset2+1)); / raw approx */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1922 int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 7);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1923 if ((ml2 >= EQUAL_READ32) && (gain2 > gain1)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1924 matchLength = ml2, offset = offset2, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1925 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1926 } } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1927 break; /* nothing found : store previous solution */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1928 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1929
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1930 /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1931 if (offset) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1932 while ((start>anchor) && (start>base+offset-ZSTD_REP_MOVE) && (start[-1] == start[-1-offset+ZSTD_REP_MOVE])) /* only search for offset within prefix */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1933 { start--; matchLength++; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1934 offset_2 = offset_1; offset_1 = (U32)(offset - ZSTD_REP_MOVE);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1935 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1936
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1937 /* store sequence */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1938 _storeSequence:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1939 { size_t const litLength = start - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1940 ZSTD_storeSeq(seqStorePtr, litLength, anchor, (U32)offset, matchLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1941 anchor = ip = start + matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1942 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1943
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1944 /* check immediate repcode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1945 while ( (ip <= ilimit)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1946 && ((offset_2>0)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1947 & (MEM_read32(ip) == MEM_read32(ip - offset_2)) )) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1948 /* store sequence */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1949 matchLength = ZSTD_count(ip+EQUAL_READ32, ip+EQUAL_READ32-offset_2, iend) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1950 offset = offset_2; offset_2 = offset_1; offset_1 = (U32)offset; /* swap repcodes */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1951 ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, matchLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1952 ip += matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1953 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1954 continue; /* faster when present ... (?) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1955 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1956
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1957 /* Save reps for next block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1958 ctx->savedRep[0] = offset_1 ? offset_1 : savedOffset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1959 ctx->savedRep[1] = offset_2 ? offset_2 : savedOffset;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1960
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1961 /* Last Literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1962 { size_t const lastLLSize = iend - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1963 memcpy(seqStorePtr->lit, anchor, lastLLSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1964 seqStorePtr->lit += lastLLSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1965 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1966 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1967
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1968
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1969 static void ZSTD_compressBlock_btlazy2(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1970 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1971 ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 1, 2);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1972 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1973
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1974 static void ZSTD_compressBlock_lazy2(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1975 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1976 ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 2);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1977 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1978
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1979 static void ZSTD_compressBlock_lazy(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1980 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1981 ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1982 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1983
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1984 static void ZSTD_compressBlock_greedy(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1985 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1986 ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1987 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1988
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1989
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1990 FORCE_INLINE
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1991 void ZSTD_compressBlock_lazy_extDict_generic(ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1992 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1993 const U32 searchMethod, const U32 depth)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1994 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1995 seqStore_t* seqStorePtr = &(ctx->seqStore);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1996 const BYTE* const istart = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1997 const BYTE* ip = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1998 const BYTE* anchor = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	1999 const BYTE* const iend = istart + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2000 const BYTE* const ilimit = iend - 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2001 const BYTE* const base = ctx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2002 const U32 dictLimit = ctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2003 const U32 lowestIndex = ctx->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2004 const BYTE* const prefixStart = base + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2005 const BYTE* const dictBase = ctx->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2006 const BYTE* const dictEnd = dictBase + dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2007 const BYTE* const dictStart = dictBase + ctx->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2008
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2009 const U32 maxSearches = 1 << ctx->params.cParams.searchLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2010 const U32 mls = ctx->params.cParams.searchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2011
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2012 typedef size_t (searchMax_f)(ZSTD_CCtx zc, const BYTE* ip, const BYTE* iLimit,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2013 size_t* offsetPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2014 U32 maxNbAttempts, U32 matchLengthSearch);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2015 searchMax_f searchMax = searchMethod ? ZSTD_BtFindBestMatch_selectMLS_extDict : ZSTD_HcFindBestMatch_extDict_selectMLS;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2016
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2017 U32 offset_1 = ctx->rep[0], offset_2 = ctx->rep[1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2018
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2019 /* init */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2020 ctx->nextToUpdate3 = ctx->nextToUpdate;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2021 ip += (ip == prefixStart);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2022
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2023 /* Match Loop */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2024 while (ip < ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2025 size_t matchLength=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2026 size_t offset=0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2027 const BYTE* start=ip+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2028 U32 current = (U32)(ip-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2029
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2030 /* check repCode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2031 { const U32 repIndex = (U32)(current+1 - offset_1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2032 const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2033 const BYTE* const repMatch = repBase + repIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2034 if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > lowestIndex)) /* intentional overflow */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2035 if (MEM_read32(ip+1) == MEM_read32(repMatch)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2036 /* repcode detected we should take it */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2037 const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2038 matchLength = ZSTD_count_2segments(ip+1+EQUAL_READ32, repMatch+EQUAL_READ32, iend, repEnd, prefixStart) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2039 if (depth==0) goto _storeSequence;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2040 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2041
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2042 /* first search (depth 0) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2043 { size_t offsetFound = 99999999;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2044 size_t const ml2 = searchMax(ctx, ip, iend, &offsetFound, maxSearches, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2045 if (ml2 > matchLength)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2046 matchLength = ml2, start = ip, offset=offsetFound;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2047 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2048
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2049 if (matchLength < EQUAL_READ32) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2050 ip += ((ip-anchor) >> g_searchStrength) + 1; /* jump faster over incompressible sections */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2051 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2052 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2053
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2054 /* let's try to find a better solution */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2055 if (depth>=1)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2056 while (ip<ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2057 ip ++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2058 current++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2059 /* check repCode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2060 if (offset) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2061 const U32 repIndex = (U32)(current - offset_1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2062 const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2063 const BYTE* const repMatch = repBase + repIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2064 if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > lowestIndex)) /* intentional overflow */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2065 if (MEM_read32(ip) == MEM_read32(repMatch)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2066 /* repcode detected */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2067 const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2068 size_t const repLength = ZSTD_count_2segments(ip+EQUAL_READ32, repMatch+EQUAL_READ32, iend, repEnd, prefixStart) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2069 int const gain2 = (int)(repLength * 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2070 int const gain1 = (int)(matchLength*3 - ZSTD_highbit32((U32)offset+1) + 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2071 if ((repLength >= EQUAL_READ32) && (gain2 > gain1))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2072 matchLength = repLength, offset = 0, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2073 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2074
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2075 /* search match, depth 1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2076 { size_t offset2=99999999;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2077 size_t const ml2 = searchMax(ctx, ip, iend, &offset2, maxSearches, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2078 int const gain2 = (int)(ml24 - ZSTD_highbit32((U32)offset2+1)); / raw approx */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2079 int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2080 if ((ml2 >= EQUAL_READ32) && (gain2 > gain1)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2081 matchLength = ml2, offset = offset2, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2082 continue; /* search a better one */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2083 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2084
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2085 /* let's find an even better one */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2086 if ((depth==2) && (ip<ilimit)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2087 ip ++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2088 current++;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2089 /* check repCode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2090 if (offset) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2091 const U32 repIndex = (U32)(current - offset_1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2092 const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2093 const BYTE* const repMatch = repBase + repIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2094 if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > lowestIndex)) /* intentional overflow */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2095 if (MEM_read32(ip) == MEM_read32(repMatch)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2096 /* repcode detected */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2097 const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2098 size_t repLength = ZSTD_count_2segments(ip+EQUAL_READ32, repMatch+EQUAL_READ32, iend, repEnd, prefixStart) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2099 int gain2 = (int)(repLength * 4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2100 int gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2101 if ((repLength >= EQUAL_READ32) && (gain2 > gain1))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2102 matchLength = repLength, offset = 0, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2103 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2104
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2105 /* search match, depth 2 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2106 { size_t offset2=99999999;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2107 size_t const ml2 = searchMax(ctx, ip, iend, &offset2, maxSearches, mls);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2108 int const gain2 = (int)(ml24 - ZSTD_highbit32((U32)offset2+1)); / raw approx */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2109 int const gain1 = (int)(matchLength*4 - ZSTD_highbit32((U32)offset+1) + 7);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2110 if ((ml2 >= EQUAL_READ32) && (gain2 > gain1)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2111 matchLength = ml2, offset = offset2, start = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2112 continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2113 } } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2114 break; /* nothing found : store previous solution */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2115 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2116
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2117 /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2118 if (offset) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2119 U32 const matchIndex = (U32)((start-base) - (offset - ZSTD_REP_MOVE));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2120 const BYTE* match = (matchIndex < dictLimit) ? dictBase + matchIndex : base + matchIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2121 const BYTE* const mStart = (matchIndex < dictLimit) ? dictStart : prefixStart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2122 while ((start>anchor) && (match>mStart) && (start[-1] == match[-1])) { start--; match--; matchLength++; } /* catch up */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2123 offset_2 = offset_1; offset_1 = (U32)(offset - ZSTD_REP_MOVE);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2124 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2125
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2126 /* store sequence */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2127 _storeSequence:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2128 { size_t const litLength = start - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2129 ZSTD_storeSeq(seqStorePtr, litLength, anchor, (U32)offset, matchLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2130 anchor = ip = start + matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2131 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2132
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2133 /* check immediate repcode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2134 while (ip <= ilimit) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2135 const U32 repIndex = (U32)((ip-base) - offset_2);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2136 const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2137 const BYTE* const repMatch = repBase + repIndex;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2138 if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > lowestIndex)) /* intentional overflow */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2139 if (MEM_read32(ip) == MEM_read32(repMatch)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2140 /* repcode detected we should take it */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2141 const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2142 matchLength = ZSTD_count_2segments(ip+EQUAL_READ32, repMatch+EQUAL_READ32, iend, repEnd, prefixStart) + EQUAL_READ32;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2143 offset = offset_2; offset_2 = offset_1; offset_1 = (U32)offset; /* swap offset history */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2144 ZSTD_storeSeq(seqStorePtr, 0, anchor, 0, matchLength-MINMATCH);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2145 ip += matchLength;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2146 anchor = ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2147 continue; /* faster when present ... (?) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2148 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2149 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2150 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2151
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2152 /* Save reps for next block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2153 ctx->savedRep[0] = offset_1; ctx->savedRep[1] = offset_2;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2154
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2155 /* Last Literals */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2156 { size_t const lastLLSize = iend - anchor;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2157 memcpy(seqStorePtr->lit, anchor, lastLLSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2158 seqStorePtr->lit += lastLLSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2159 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2160 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2161
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2162
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2163 void ZSTD_compressBlock_greedy_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2164 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2165 ZSTD_compressBlock_lazy_extDict_generic(ctx, src, srcSize, 0, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2166 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2167
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2168 static void ZSTD_compressBlock_lazy_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2169 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2170 ZSTD_compressBlock_lazy_extDict_generic(ctx, src, srcSize, 0, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2171 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2172
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2173 static void ZSTD_compressBlock_lazy2_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2174 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2175 ZSTD_compressBlock_lazy_extDict_generic(ctx, src, srcSize, 0, 2);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2176 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2177
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2178 static void ZSTD_compressBlock_btlazy2_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2179 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2180 ZSTD_compressBlock_lazy_extDict_generic(ctx, src, srcSize, 1, 2);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2181 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2182
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2183
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2184 /* The optimal parser */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2185 #include "zstd_opt.h"
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2186
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2187 static void ZSTD_compressBlock_btopt(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2188 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2189 #ifdef ZSTD_OPT_H_91842398743
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2190 ZSTD_compressBlock_opt_generic(ctx, src, srcSize, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2191 #else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2192 (void)ctx; (void)src; (void)srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2193 return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2194 #endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2195 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2196
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2197 static void ZSTD_compressBlock_btopt2(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2198 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2199 #ifdef ZSTD_OPT_H_91842398743
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2200 ZSTD_compressBlock_opt_generic(ctx, src, srcSize, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2201 #else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2202 (void)ctx; (void)src; (void)srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2203 return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2204 #endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2205 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2206
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2207 static void ZSTD_compressBlock_btopt_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2208 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2209 #ifdef ZSTD_OPT_H_91842398743
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2210 ZSTD_compressBlock_opt_extDict_generic(ctx, src, srcSize, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2211 #else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2212 (void)ctx; (void)src; (void)srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2213 return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2214 #endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2215 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2216
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2217 static void ZSTD_compressBlock_btopt2_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2218 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2219 #ifdef ZSTD_OPT_H_91842398743
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2220 ZSTD_compressBlock_opt_extDict_generic(ctx, src, srcSize, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2221 #else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2222 (void)ctx; (void)src; (void)srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2223 return;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2224 #endif
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2225 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2226
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2227
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2228 typedef void (ZSTD_blockCompressor) (ZSTD_CCtx ctx, const void* src, size_t srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2229
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2230 static ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, int extDict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2231 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2232 static const ZSTD_blockCompressor blockCompressor[2][8] = {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2233 { ZSTD_compressBlock_fast, ZSTD_compressBlock_doubleFast, ZSTD_compressBlock_greedy, ZSTD_compressBlock_lazy, ZSTD_compressBlock_lazy2, ZSTD_compressBlock_btlazy2, ZSTD_compressBlock_btopt, ZSTD_compressBlock_btopt2 },
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2234 { ZSTD_compressBlock_fast_extDict, ZSTD_compressBlock_doubleFast_extDict, ZSTD_compressBlock_greedy_extDict, ZSTD_compressBlock_lazy_extDict,ZSTD_compressBlock_lazy2_extDict, ZSTD_compressBlock_btlazy2_extDict, ZSTD_compressBlock_btopt_extDict, ZSTD_compressBlock_btopt2_extDict }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2235 };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2236
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2237 return blockCompressor[extDict][(U32)strat];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2238 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2239
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2240
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2241 static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc, void* dst, size_t dstCapacity, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2242 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2243 ZSTD_blockCompressor const blockCompressor = ZSTD_selectBlockCompressor(zc->params.cParams.strategy, zc->lowLimit < zc->dictLimit);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2244 const BYTE* const base = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2245 const BYTE* const istart = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2246 const U32 current = (U32)(istart-base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2247 if (srcSize < MIN_CBLOCK_SIZE+ZSTD_blockHeaderSize+1) return 0; /* don't even attempt compression below a certain srcSize */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2248 ZSTD_resetSeqStore(&(zc->seqStore));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2249 if (current > zc->nextToUpdate + 384)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2250 zc->nextToUpdate = current - MIN(192, (U32)(current - zc->nextToUpdate - 384)); /* update tree not updated after finding very long rep matches */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2251 blockCompressor(zc, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2252 return ZSTD_compressSequences(zc, dst, dstCapacity, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2253 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2254
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2255
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2256 /*! ZSTD_compress_generic() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2257 * Compress a chunk of data into one or multiple blocks.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2258 * All blocks will be terminated, all input will be consumed.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2259 * Function will issue an error if there is not enough `dstCapacity` to hold the compressed content.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2260 * Frame is supposed already started (header already produced)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2261 * @return : compressed size, or an error code
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2262 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2263 static size_t ZSTD_compress_generic (ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2264 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2265 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2266 U32 lastFrameChunk)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2267 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2268 size_t blockSize = cctx->blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2269 size_t remaining = srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2270 const BYTE* ip = (const BYTE*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2271 BYTE* const ostart = (BYTE*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2272 BYTE* op = ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2273 U32 const maxDist = 1 << cctx->params.cParams.windowLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2274
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2275 if (cctx->params.fParams.checksumFlag && srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2276 XXH64_update(&cctx->xxhState, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2277
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2278 while (remaining) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2279 U32 const lastBlock = lastFrameChunk & (blockSize >= remaining);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2280 size_t cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2281
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2282 if (dstCapacity < ZSTD_blockHeaderSize + MIN_CBLOCK_SIZE) return ERROR(dstSize_tooSmall); /* not enough space to store compressed block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2283 if (remaining < blockSize) blockSize = remaining;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2284
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2285 /* preemptive overflow correction */
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2286 if (cctx->lowLimit > (2U<<30)) {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2287 U32 const cycleMask = (1 << ZSTD_cycleLog(cctx->params.cParams.hashLog, cctx->params.cParams.strategy)) - 1;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2288 U32 const current = (U32)(ip - cctx->base);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2289 U32 const newCurrent = (current & cycleMask) + (1 << cctx->params.cParams.windowLog);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2290 U32 const correction = current - newCurrent;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2291 ZSTD_STATIC_ASSERT(ZSTD_WINDOWLOG_MAX_64 <= 30);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2292 ZSTD_reduceIndex(cctx, correction);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2293 cctx->base += correction;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2294 cctx->dictBase += correction;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2295 cctx->lowLimit -= correction;
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2296 cctx->dictLimit -= correction;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2297 if (cctx->nextToUpdate < correction) cctx->nextToUpdate = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2298 else cctx->nextToUpdate -= correction;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2299 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2300
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2301 if ((U32)(ip+blockSize - cctx->base) > cctx->loadedDictEnd + maxDist) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2302 /* enforce maxDist */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2303 U32 const newLowLimit = (U32)(ip+blockSize - cctx->base) - maxDist;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2304 if (cctx->lowLimit < newLowLimit) cctx->lowLimit = newLowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2305 if (cctx->dictLimit < cctx->lowLimit) cctx->dictLimit = cctx->lowLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2306 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2307
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2308 cSize = ZSTD_compressBlock_internal(cctx, op+ZSTD_blockHeaderSize, dstCapacity-ZSTD_blockHeaderSize, ip, blockSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2309 if (ZSTD_isError(cSize)) return cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2310
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2311 if (cSize == 0) { /* block is not compressible */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2312 U32 const cBlockHeader24 = lastBlock + (((U32)bt_raw)<<1) + (U32)(blockSize << 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2313 if (blockSize + ZSTD_blockHeaderSize > dstCapacity) return ERROR(dstSize_tooSmall);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2314 MEM_writeLE32(op, cBlockHeader24); /* no pb, 4th byte will be overwritten */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2315 memcpy(op + ZSTD_blockHeaderSize, ip, blockSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2316 cSize = ZSTD_blockHeaderSize+blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2317 } else {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2318 U32 const cBlockHeader24 = lastBlock + (((U32)bt_compressed)<<1) + (U32)(cSize << 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2319 MEM_writeLE24(op, cBlockHeader24);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2320 cSize += ZSTD_blockHeaderSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2321 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2322
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2323 remaining -= blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2324 dstCapacity -= cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2325 ip += blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2326 op += cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2327 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2328
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2329 if (lastFrameChunk && (op>ostart)) cctx->stage = ZSTDcs_ending;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2330 return op-ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2331 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2332
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2333
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2334 static size_t ZSTD_writeFrameHeader(void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2335 ZSTD_parameters params, U64 pledgedSrcSize, U32 dictID)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2336 { BYTE* const op = (BYTE*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2337 U32 const dictIDSizeCode = (dictID>0) + (dictID>=256) + (dictID>=65536); /* 0-3 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2338 U32 const checksumFlag = params.fParams.checksumFlag>0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2339 U32 const windowSize = 1U << params.cParams.windowLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2340 U32 const singleSegment = params.fParams.contentSizeFlag && (windowSize > (pledgedSrcSize-1));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2341 BYTE const windowLogByte = (BYTE)((params.cParams.windowLog - ZSTD_WINDOWLOG_ABSOLUTEMIN) << 3);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2342 U32 const fcsCode = params.fParams.contentSizeFlag ?
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2343 (pledgedSrcSize>=256) + (pledgedSrcSize>=65536+256) + (pledgedSrcSize>=0xFFFFFFFFU) : /* 0-3 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2344 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2345 BYTE const frameHeaderDecriptionByte = (BYTE)(dictIDSizeCode + (checksumFlag<<2) + (singleSegment<<5) + (fcsCode<<6) );
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2346 size_t pos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2347
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2348 if (dstCapacity < ZSTD_frameHeaderSize_max) return ERROR(dstSize_tooSmall);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2349
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2350 MEM_writeLE32(dst, ZSTD_MAGICNUMBER);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2351 op[4] = frameHeaderDecriptionByte; pos=5;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2352 if (!singleSegment) op[pos++] = windowLogByte;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2353 switch(dictIDSizeCode)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2354 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2355 default: /* impossible */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2356 case 0 : break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2357 case 1 : op[pos] = (BYTE)(dictID); pos++; break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2358 case 2 : MEM_writeLE16(op+pos, (U16)dictID); pos+=2; break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2359 case 3 : MEM_writeLE32(op+pos, dictID); pos+=4; break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2360 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2361 switch(fcsCode)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2362 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2363 default: /* impossible */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2364 case 0 : if (singleSegment) op[pos++] = (BYTE)(pledgedSrcSize); break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2365 case 1 : MEM_writeLE16(op+pos, (U16)(pledgedSrcSize-256)); pos+=2; break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2366 case 2 : MEM_writeLE32(op+pos, (U32)(pledgedSrcSize)); pos+=4; break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2367 case 3 : MEM_writeLE64(op+pos, (U64)(pledgedSrcSize)); pos+=8; break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2368 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2369 return pos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2370 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2371
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2372
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2373 static size_t ZSTD_compressContinue_internal (ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2374 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2375 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2376 U32 frame, U32 lastFrameChunk)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2377 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2378 const BYTE* const ip = (const BYTE*) src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2379 size_t fhSize = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2380
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2381 if (cctx->stage==ZSTDcs_created) return ERROR(stage_wrong); /* missing init (ZSTD_compressBegin) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2382
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2383 if (frame && (cctx->stage==ZSTDcs_init)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2384 fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, cctx->params, cctx->frameContentSize, cctx->dictID);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2385 if (ZSTD_isError(fhSize)) return fhSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2386 dstCapacity -= fhSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2387 dst = (char*)dst + fhSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2388 cctx->stage = ZSTDcs_ongoing;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2389 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2390
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2391 /* Check if blocks follow each other */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2392 if (src != cctx->nextSrc) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2393 /* not contiguous */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2394 ptrdiff_t const delta = cctx->nextSrc - ip;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2395 cctx->lowLimit = cctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2396 cctx->dictLimit = (U32)(cctx->nextSrc - cctx->base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2397 cctx->dictBase = cctx->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2398 cctx->base -= delta;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2399 cctx->nextToUpdate = cctx->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2400 if (cctx->dictLimit - cctx->lowLimit < HASH_READ_SIZE) cctx->lowLimit = cctx->dictLimit; /* too small extDict */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2401 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2402
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2403 /* if input and dictionary overlap : reduce dictionary (area presumed modified by input) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2404 if ((ip+srcSize > cctx->dictBase + cctx->lowLimit) & (ip < cctx->dictBase + cctx->dictLimit)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2405 ptrdiff_t const highInputIdx = (ip + srcSize) - cctx->dictBase;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2406 U32 const lowLimitMax = (highInputIdx > (ptrdiff_t)cctx->dictLimit) ? cctx->dictLimit : (U32)highInputIdx;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2407 cctx->lowLimit = lowLimitMax;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2408 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2409
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2410 cctx->nextSrc = ip + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2411
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2412 { size_t const cSize = frame ?
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2413 ZSTD_compress_generic (cctx, dst, dstCapacity, src, srcSize, lastFrameChunk) :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2414 ZSTD_compressBlock_internal (cctx, dst, dstCapacity, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2415 if (ZSTD_isError(cSize)) return cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2416 return cSize + fhSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2417 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2418 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2419
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2420
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2421 size_t ZSTD_compressContinue (ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2422 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2423 const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2424 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2425 return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 1, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2426 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2427
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2428
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2429 size_t ZSTD_getBlockSizeMax(ZSTD_CCtx* cctx)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2430 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2431 return MIN (ZSTD_BLOCKSIZE_ABSOLUTEMAX, 1 << cctx->params.cParams.windowLog);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2432 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2433
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2434 size_t ZSTD_compressBlock(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2435 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2436 size_t const blockSizeMax = ZSTD_getBlockSizeMax(cctx);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2437 if (srcSize > blockSizeMax) return ERROR(srcSize_wrong);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2438 return ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 0, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2439 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2440
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2441
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2442 static size_t ZSTD_loadDictionaryContent(ZSTD_CCtx* zc, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2443 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2444 const BYTE* const ip = (const BYTE*) src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2445 const BYTE* const iend = ip + srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2446
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2447 /* input becomes current prefix */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2448 zc->lowLimit = zc->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2449 zc->dictLimit = (U32)(zc->nextSrc - zc->base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2450 zc->dictBase = zc->base;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2451 zc->base += ip - zc->nextSrc;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2452 zc->nextToUpdate = zc->dictLimit;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2453 zc->loadedDictEnd = (U32)(iend - zc->base);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2454
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2455 zc->nextSrc = iend;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2456 if (srcSize <= HASH_READ_SIZE) return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2457
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2458 switch(zc->params.cParams.strategy)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2459 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2460 case ZSTD_fast:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2461 ZSTD_fillHashTable (zc, iend, zc->params.cParams.searchLength);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2462 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2463
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2464 case ZSTD_dfast:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2465 ZSTD_fillDoubleHashTable (zc, iend, zc->params.cParams.searchLength);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2466 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2467
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2468 case ZSTD_greedy:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2469 case ZSTD_lazy:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2470 case ZSTD_lazy2:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2471 ZSTD_insertAndFindFirstIndex (zc, iend-HASH_READ_SIZE, zc->params.cParams.searchLength);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2472 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2473
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2474 case ZSTD_btlazy2:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2475 case ZSTD_btopt:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2476 case ZSTD_btopt2:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2477 ZSTD_updateTree(zc, iend-HASH_READ_SIZE, iend, 1 << zc->params.cParams.searchLog, zc->params.cParams.searchLength);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2478 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2479
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2480 default:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2481 return ERROR(GENERIC); /* strategy doesn't exist; impossible */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2482 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2483
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2484 zc->nextToUpdate = zc->loadedDictEnd;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2485 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2486 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2487
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2488
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2489 /* Dictionaries that assign zero probability to symbols that show up causes problems
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2490 when FSE encoding. Refuse dictionaries that assign zero probability to symbols
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2491 that we may encounter during compression.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2492 NOTE: This behavior is not standard and could be improved in the future. */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2493 static size_t ZSTD_checkDictNCount(short* normalizedCounter, unsigned dictMaxSymbolValue, unsigned maxSymbolValue) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2494 U32 s;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2495 if (dictMaxSymbolValue < maxSymbolValue) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2496 for (s = 0; s <= maxSymbolValue; ++s) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2497 if (normalizedCounter[s] == 0) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2498 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2499 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2500 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2501
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2502
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2503 /* Dictionary format :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2504 Magic == ZSTD_DICT_MAGIC (4 bytes)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2505 HUF_writeCTable(256)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2506 FSE_writeNCount(off)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2507 FSE_writeNCount(ml)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2508 FSE_writeNCount(ll)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2509 RepOffsets
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2510 Dictionary content
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2511 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2512 /*! ZSTD_loadDictEntropyStats() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2513 @return : size read from dictionary
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2514 note : magic number supposed already checked */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2515 static size_t ZSTD_loadDictEntropyStats(ZSTD_CCtx* cctx, const void* dict, size_t dictSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2516 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2517 const BYTE* dictPtr = (const BYTE*)dict;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2518 const BYTE* const dictEnd = dictPtr + dictSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2519 short offcodeNCount[MaxOff+1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2520 unsigned offcodeMaxValue = MaxOff;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2521 BYTE scratchBuffer[1<<MAX(MLFSELog,LLFSELog)];
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2522
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2523 { size_t const hufHeaderSize = HUF_readCTable(cctx->hufTable, 255, dict, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2524 if (HUF_isError(hufHeaderSize)) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2525 dictPtr += hufHeaderSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2526 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2527
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2528 { unsigned offcodeLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2529 size_t const offcodeHeaderSize = FSE_readNCount(offcodeNCount, &offcodeMaxValue, &offcodeLog, dictPtr, dictEnd-dictPtr);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2530 if (FSE_isError(offcodeHeaderSize)) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2531 if (offcodeLog > OffFSELog) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2532 /* Defer checking offcodeMaxValue because we need to know the size of the dictionary content */
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2533 CHECK_E (FSE_buildCTable_wksp(cctx->offcodeCTable, offcodeNCount, offcodeMaxValue, offcodeLog, scratchBuffer, sizeof(scratchBuffer)), dictionary_corrupted);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2534 dictPtr += offcodeHeaderSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2535 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2536
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2537 { short matchlengthNCount[MaxML+1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2538 unsigned matchlengthMaxValue = MaxML, matchlengthLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2539 size_t const matchlengthHeaderSize = FSE_readNCount(matchlengthNCount, &matchlengthMaxValue, &matchlengthLog, dictPtr, dictEnd-dictPtr);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2540 if (FSE_isError(matchlengthHeaderSize)) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2541 if (matchlengthLog > MLFSELog) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2542 /* Every match length code must have non-zero probability */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2543 CHECK_F (ZSTD_checkDictNCount(matchlengthNCount, matchlengthMaxValue, MaxML));
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2544 CHECK_E (FSE_buildCTable_wksp(cctx->matchlengthCTable, matchlengthNCount, matchlengthMaxValue, matchlengthLog, scratchBuffer, sizeof(scratchBuffer)), dictionary_corrupted);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2545 dictPtr += matchlengthHeaderSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2546 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2547
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2548 { short litlengthNCount[MaxLL+1];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2549 unsigned litlengthMaxValue = MaxLL, litlengthLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2550 size_t const litlengthHeaderSize = FSE_readNCount(litlengthNCount, &litlengthMaxValue, &litlengthLog, dictPtr, dictEnd-dictPtr);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2551 if (FSE_isError(litlengthHeaderSize)) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2552 if (litlengthLog > LLFSELog) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2553 /* Every literal length code must have non-zero probability */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2554 CHECK_F (ZSTD_checkDictNCount(litlengthNCount, litlengthMaxValue, MaxLL));
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2555 CHECK_E(FSE_buildCTable_wksp(cctx->litlengthCTable, litlengthNCount, litlengthMaxValue, litlengthLog, scratchBuffer, sizeof(scratchBuffer)), dictionary_corrupted);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2556 dictPtr += litlengthHeaderSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2557 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2558
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2559 if (dictPtr+12 > dictEnd) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2560 cctx->rep[0] = MEM_readLE32(dictPtr+0); if (cctx->rep[0] >= dictSize) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2561 cctx->rep[1] = MEM_readLE32(dictPtr+4); if (cctx->rep[1] >= dictSize) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2562 cctx->rep[2] = MEM_readLE32(dictPtr+8); if (cctx->rep[2] >= dictSize) return ERROR(dictionary_corrupted);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2563 dictPtr += 12;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2564
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2565 { U32 offcodeMax = MaxOff;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2566 if ((size_t)(dictEnd - dictPtr) <= ((U32)-1) - 128 KB) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2567 U32 const maxOffset = (U32)(dictEnd - dictPtr) + 128 KB; /* The maximum offset that must be supported */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2568 /* Calculate minimum offset code required to represent maxOffset */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2569 offcodeMax = ZSTD_highbit32(maxOffset);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2570 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2571 /* Every possible supported offset <= dictContentSize + 128 KB must be representable */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2572 CHECK_F (ZSTD_checkDictNCount(offcodeNCount, offcodeMaxValue, MIN(offcodeMax, MaxOff)));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2573 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2574
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2575 cctx->flagStaticTables = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2576 return dictPtr - (const BYTE*)dict;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2577 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2578
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2579 /** ZSTD_compress_insertDictionary() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2580 * @return : 0, or an error code */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2581 static size_t ZSTD_compress_insertDictionary(ZSTD_CCtx* zc, const void* dict, size_t dictSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2582 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2583 if ((dict==NULL) \|\| (dictSize<=8)) return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2584
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2585 /* default : dict is pure content */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2586 if (MEM_readLE32(dict) != ZSTD_DICT_MAGIC) return ZSTD_loadDictionaryContent(zc, dict, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2587 zc->dictID = zc->params.fParams.noDictIDFlag ? 0 : MEM_readLE32((const char*)dict+4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2588
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2589 /* known magic number : dict is parsed for entropy stats and content */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2590 { size_t const loadError = ZSTD_loadDictEntropyStats(zc, (const char)dict+8 / skip dictHeader */, dictSize-8);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2591 size_t const eSize = loadError + 8;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2592 if (ZSTD_isError(loadError)) return loadError;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2593 return ZSTD_loadDictionaryContent(zc, (const char*)dict+eSize, dictSize-eSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2594 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2595 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2596
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2597
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2598 /*! ZSTD_compressBegin_internal() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2599 * @return : 0, or an error code */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2600 static size_t ZSTD_compressBegin_internal(ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2601 const void* dict, size_t dictSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2602 ZSTD_parameters params, U64 pledgedSrcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2603 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2604 ZSTD_compResetPolicy_e const crp = dictSize ? ZSTDcrp_fullReset : ZSTDcrp_continue;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2605 CHECK_F(ZSTD_resetCCtx_advanced(cctx, params, pledgedSrcSize, crp));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2606 return ZSTD_compress_insertDictionary(cctx, dict, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2607 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2608
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2609
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2610 /*! ZSTD_compressBegin_advanced() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2611 * @return : 0, or an error code */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2612 size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2613 const void* dict, size_t dictSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2614 ZSTD_parameters params, unsigned long long pledgedSrcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2615 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2616 /* compression parameters verification and optimization */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2617 CHECK_F(ZSTD_checkCParams(params.cParams));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2618 return ZSTD_compressBegin_internal(cctx, dict, dictSize, params, pledgedSrcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2619 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2620
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2621
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2622 size_t ZSTD_compressBegin_usingDict(ZSTD_CCtx* cctx, const void* dict, size_t dictSize, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2623 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2624 ZSTD_parameters const params = ZSTD_getParams(compressionLevel, 0, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2625 return ZSTD_compressBegin_internal(cctx, dict, dictSize, params, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2626 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2627
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2628
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2629 size_t ZSTD_compressBegin(ZSTD_CCtx* zc, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2630 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2631 return ZSTD_compressBegin_usingDict(zc, NULL, 0, compressionLevel);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2632 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2633
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2634
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2635 /*! ZSTD_writeEpilogue() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2636 * Ends a frame.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2637 * @return : nb of bytes written into dst (or an error code) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2638 static size_t ZSTD_writeEpilogue(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2639 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2640 BYTE* const ostart = (BYTE*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2641 BYTE* op = ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2642 size_t fhSize = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2643
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2644 if (cctx->stage == ZSTDcs_created) return ERROR(stage_wrong); /* init missing */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2645
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2646 /* special case : empty frame */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2647 if (cctx->stage == ZSTDcs_init) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2648 fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, cctx->params, 0, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2649 if (ZSTD_isError(fhSize)) return fhSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2650 dstCapacity -= fhSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2651 op += fhSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2652 cctx->stage = ZSTDcs_ongoing;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2653 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2654
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2655 if (cctx->stage != ZSTDcs_ending) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2656 /* write one last empty block, make it the "last" block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2657 U32 const cBlockHeader24 = 1 /* last block */ + (((U32)bt_raw)<<1) + 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2658 if (dstCapacity<4) return ERROR(dstSize_tooSmall);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2659 MEM_writeLE32(op, cBlockHeader24);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2660 op += ZSTD_blockHeaderSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2661 dstCapacity -= ZSTD_blockHeaderSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2662 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2663
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2664 if (cctx->params.fParams.checksumFlag) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2665 U32 const checksum = (U32) XXH64_digest(&cctx->xxhState);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2666 if (dstCapacity<4) return ERROR(dstSize_tooSmall);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2667 MEM_writeLE32(op, checksum);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2668 op += 4;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2669 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2670
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2671 cctx->stage = ZSTDcs_created; /* return to "created but no init" status */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2672 return op-ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2673 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2674
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2675
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2676 size_t ZSTD_compressEnd (ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2677 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2678 const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2679 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2680 size_t endResult;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2681 size_t const cSize = ZSTD_compressContinue_internal(cctx, dst, dstCapacity, src, srcSize, 1, 1);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2682 if (ZSTD_isError(cSize)) return cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2683 endResult = ZSTD_writeEpilogue(cctx, (char*)dst + cSize, dstCapacity-cSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2684 if (ZSTD_isError(endResult)) return endResult;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2685 return cSize + endResult;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2686 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2687
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2688
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2689 static size_t ZSTD_compress_internal (ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2690 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2691 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2692 const void* dict,size_t dictSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2693 ZSTD_parameters params)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2694 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2695 CHECK_F(ZSTD_compressBegin_internal(cctx, dict, dictSize, params, srcSize));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2696 return ZSTD_compressEnd(cctx, dst, dstCapacity, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2697 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2698
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2699 size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2700 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2701 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2702 const void* dict,size_t dictSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2703 ZSTD_parameters params)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2704 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2705 CHECK_F(ZSTD_checkCParams(params.cParams));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2706 return ZSTD_compress_internal(ctx, dst, dstCapacity, src, srcSize, dict, dictSize, params);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2707 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2708
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2709 size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize, const void* dict, size_t dictSize, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2710 {
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2711 ZSTD_parameters params = ZSTD_getParams(compressionLevel, srcSize, dict ? dictSize : 0);
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2712 params.fParams.contentSizeFlag = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2713 return ZSTD_compress_internal(ctx, dst, dstCapacity, src, srcSize, dict, dictSize, params);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2714 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2715
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2716 size_t ZSTD_compressCCtx (ZSTD_CCtx* ctx, void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2717 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2718 return ZSTD_compress_usingDict(ctx, dst, dstCapacity, src, srcSize, NULL, 0, compressionLevel);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2719 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2720
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2721 size_t ZSTD_compress(void* dst, size_t dstCapacity, const void* src, size_t srcSize, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2722 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2723 size_t result;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2724 ZSTD_CCtx ctxBody;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2725 memset(&ctxBody, 0, sizeof(ctxBody));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2726 memcpy(&ctxBody.customMem, &defaultCustomMem, sizeof(ZSTD_customMem));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2727 result = ZSTD_compressCCtx(&ctxBody, dst, dstCapacity, src, srcSize, compressionLevel);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2728 ZSTD_free(ctxBody.workSpace, defaultCustomMem); /* can't free ctxBody itself, as it's on stack; free only heap content */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2729 return result;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2730 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2731
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2732
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2733 /* ===== Dictionary API ===== */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2734
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2735 struct ZSTD_CDict_s {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2736 void* dictContent;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2737 size_t dictContentSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2738 ZSTD_CCtx* refContext;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2739 }; /* typedef'd tp ZSTD_CDict within "zstd.h" */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2740
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2741 size_t ZSTD_sizeof_CDict(const ZSTD_CDict* cdict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2742 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2743 if (cdict==NULL) return 0; /* support sizeof on NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2744 return ZSTD_sizeof_CCtx(cdict->refContext) + cdict->dictContentSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2745 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2746
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2747 ZSTD_CDict* ZSTD_createCDict_advanced(const void* dict, size_t dictSize, ZSTD_parameters params, ZSTD_customMem customMem)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2748 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2749 if (!customMem.customAlloc && !customMem.customFree) customMem = defaultCustomMem;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2750 if (!customMem.customAlloc \|\| !customMem.customFree) return NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2751
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2752 { ZSTD_CDict* const cdict = (ZSTD_CDict*) ZSTD_malloc(sizeof(ZSTD_CDict), customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2753 void* const dictContent = ZSTD_malloc(dictSize, customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2754 ZSTD_CCtx* const cctx = ZSTD_createCCtx_advanced(customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2755
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2756 if (!dictContent \|\| !cdict \|\| !cctx) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2757 ZSTD_free(dictContent, customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2758 ZSTD_free(cdict, customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2759 ZSTD_free(cctx, customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2760 return NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2761 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2762
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2763 if (dictSize) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2764 memcpy(dictContent, dict, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2765 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2766 { size_t const errorCode = ZSTD_compressBegin_advanced(cctx, dictContent, dictSize, params, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2767 if (ZSTD_isError(errorCode)) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2768 ZSTD_free(dictContent, customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2769 ZSTD_free(cdict, customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2770 ZSTD_free(cctx, customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2771 return NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2772 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2773
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2774 cdict->dictContent = dictContent;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2775 cdict->dictContentSize = dictSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2776 cdict->refContext = cctx;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2777 return cdict;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2778 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2779 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2780
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2781 ZSTD_CDict* ZSTD_createCDict(const void* dict, size_t dictSize, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2782 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2783 ZSTD_customMem const allocator = { NULL, NULL, NULL };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2784 ZSTD_parameters params = ZSTD_getParams(compressionLevel, 0, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2785 params.fParams.contentSizeFlag = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2786 return ZSTD_createCDict_advanced(dict, dictSize, params, allocator);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2787 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2788
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2789 size_t ZSTD_freeCDict(ZSTD_CDict* cdict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2790 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2791 if (cdict==NULL) return 0; /* support free on NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2792 { ZSTD_customMem const cMem = cdict->refContext->customMem;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2793 ZSTD_freeCCtx(cdict->refContext);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2794 ZSTD_free(cdict->dictContent, cMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2795 ZSTD_free(cdict, cMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2796 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2797 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2798 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2799
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2800 static ZSTD_parameters ZSTD_getParamsFromCDict(const ZSTD_CDict* cdict) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2801 return ZSTD_getParamsFromCCtx(cdict->refContext);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2802 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2803
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2804 size_t ZSTD_compressBegin_usingCDict(ZSTD_CCtx* cctx, const ZSTD_CDict* cdict, U64 pledgedSrcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2805 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2806 if (cdict->dictContentSize) CHECK_F(ZSTD_copyCCtx(cctx, cdict->refContext, pledgedSrcSize))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2807 else CHECK_F(ZSTD_compressBegin_advanced(cctx, NULL, 0, cdict->refContext->params, pledgedSrcSize));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2808 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2809 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2810
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2811 /*! ZSTD_compress_usingCDict() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2812 * Compression using a digested Dictionary.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2813 * Faster startup than ZSTD_compress_usingDict(), recommended when same dictionary is used multiple times.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2814 * Note that compression level is decided during dictionary creation */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2815 size_t ZSTD_compress_usingCDict(ZSTD_CCtx* cctx,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2816 void* dst, size_t dstCapacity,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2817 const void* src, size_t srcSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2818 const ZSTD_CDict* cdict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2819 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2820 CHECK_F(ZSTD_compressBegin_usingCDict(cctx, cdict, srcSize));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2821
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2822 if (cdict->refContext->params.fParams.contentSizeFlag==1) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2823 cctx->params.fParams.contentSizeFlag = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2824 cctx->frameContentSize = srcSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2825 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2826
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2827 return ZSTD_compressEnd(cctx, dst, dstCapacity, src, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2828 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2829
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2830
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2831
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2832 /* ******************************************************************
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2833 * Streaming
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2834 ********************************************************************/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2835
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2836 typedef enum { zcss_init, zcss_load, zcss_flush, zcss_final } ZSTD_cStreamStage;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2837
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2838 struct ZSTD_CStream_s {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2839 ZSTD_CCtx* cctx;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2840 ZSTD_CDict* cdictLocal;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2841 const ZSTD_CDict* cdict;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2842 char* inBuff;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2843 size_t inBuffSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2844 size_t inToCompress;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2845 size_t inBuffPos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2846 size_t inBuffTarget;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2847 size_t blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2848 char* outBuff;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2849 size_t outBuffSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2850 size_t outBuffContentSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2851 size_t outBuffFlushedSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2852 ZSTD_cStreamStage stage;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2853 U32 checksum;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2854 U32 frameEnded;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2855 U64 pledgedSrcSize;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2856 U64 inputProcessed;
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2857 ZSTD_parameters params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2858 ZSTD_customMem customMem;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2859 }; /* typedef'd to ZSTD_CStream within "zstd.h" */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2860
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2861 ZSTD_CStream* ZSTD_createCStream(void)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2862 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2863 return ZSTD_createCStream_advanced(defaultCustomMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2864 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2865
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2866 ZSTD_CStream* ZSTD_createCStream_advanced(ZSTD_customMem customMem)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2867 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2868 ZSTD_CStream* zcs;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2869
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2870 if (!customMem.customAlloc && !customMem.customFree) customMem = defaultCustomMem;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2871 if (!customMem.customAlloc \|\| !customMem.customFree) return NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2872
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2873 zcs = (ZSTD_CStream*)ZSTD_malloc(sizeof(ZSTD_CStream), customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2874 if (zcs==NULL) return NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2875 memset(zcs, 0, sizeof(ZSTD_CStream));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2876 memcpy(&zcs->customMem, &customMem, sizeof(ZSTD_customMem));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2877 zcs->cctx = ZSTD_createCCtx_advanced(customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2878 if (zcs->cctx == NULL) { ZSTD_freeCStream(zcs); return NULL; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2879 return zcs;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2880 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2881
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2882 size_t ZSTD_freeCStream(ZSTD_CStream* zcs)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2883 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2884 if (zcs==NULL) return 0; /* support free on NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2885 { ZSTD_customMem const cMem = zcs->customMem;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2886 ZSTD_freeCCtx(zcs->cctx);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2887 ZSTD_freeCDict(zcs->cdictLocal);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2888 ZSTD_free(zcs->inBuff, cMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2889 ZSTD_free(zcs->outBuff, cMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2890 ZSTD_free(zcs, cMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2891 return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2892 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2893 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2894
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2895
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2896 /====== Initialization ======/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2897
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2898 size_t ZSTD_CStreamInSize(void) { return ZSTD_BLOCKSIZE_ABSOLUTEMAX; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2899 size_t ZSTD_CStreamOutSize(void) { return ZSTD_compressBound(ZSTD_BLOCKSIZE_ABSOLUTEMAX) + ZSTD_blockHeaderSize + 4 /* 32-bits hash */ ; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2900
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2901 size_t ZSTD_resetCStream(ZSTD_CStream* zcs, unsigned long long pledgedSrcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2902 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2903 if (zcs->inBuffSize==0) return ERROR(stage_wrong); /* zcs has not been init at least once */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2904
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2905 if (zcs->cdict) CHECK_F(ZSTD_compressBegin_usingCDict(zcs->cctx, zcs->cdict, pledgedSrcSize))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2906 else CHECK_F(ZSTD_compressBegin_advanced(zcs->cctx, NULL, 0, zcs->params, pledgedSrcSize));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2907
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2908 zcs->inToCompress = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2909 zcs->inBuffPos = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2910 zcs->inBuffTarget = zcs->blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2911 zcs->outBuffContentSize = zcs->outBuffFlushedSize = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2912 zcs->stage = zcss_load;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2913 zcs->frameEnded = 0;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2914 zcs->pledgedSrcSize = pledgedSrcSize;
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2915 zcs->inputProcessed = 0;
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2916 return 0; /* ready to go */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2917 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2918
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2919 size_t ZSTD_initCStream_advanced(ZSTD_CStream* zcs,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2920 const void* dict, size_t dictSize,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2921 ZSTD_parameters params, unsigned long long pledgedSrcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2922 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2923 /* allocate buffers */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2924 { size_t const neededInBuffSize = (size_t)1 << params.cParams.windowLog;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2925 if (zcs->inBuffSize < neededInBuffSize) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2926 zcs->inBuffSize = neededInBuffSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2927 ZSTD_free(zcs->inBuff, zcs->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2928 zcs->inBuff = (char*) ZSTD_malloc(neededInBuffSize, zcs->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2929 if (zcs->inBuff == NULL) return ERROR(memory_allocation);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2930 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2931 zcs->blockSize = MIN(ZSTD_BLOCKSIZE_ABSOLUTEMAX, neededInBuffSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2932 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2933 if (zcs->outBuffSize < ZSTD_compressBound(zcs->blockSize)+1) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2934 zcs->outBuffSize = ZSTD_compressBound(zcs->blockSize)+1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2935 ZSTD_free(zcs->outBuff, zcs->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2936 zcs->outBuff = (char*) ZSTD_malloc(zcs->outBuffSize, zcs->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2937 if (zcs->outBuff == NULL) return ERROR(memory_allocation);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2938 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2939
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2940 if (dict) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2941 ZSTD_freeCDict(zcs->cdictLocal);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2942 zcs->cdictLocal = ZSTD_createCDict_advanced(dict, dictSize, params, zcs->customMem);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2943 if (zcs->cdictLocal == NULL) return ERROR(memory_allocation);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2944 zcs->cdict = zcs->cdictLocal;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2945 } else zcs->cdict = NULL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2946
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2947 zcs->checksum = params.fParams.checksumFlag > 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2948 zcs->params = params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2949
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2950 return ZSTD_resetCStream(zcs, pledgedSrcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2951 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2952
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2953 /* note : cdict must outlive compression session */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2954 size_t ZSTD_initCStream_usingCDict(ZSTD_CStream* zcs, const ZSTD_CDict* cdict)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2955 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2956 ZSTD_parameters const params = ZSTD_getParamsFromCDict(cdict);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2957 size_t const initError = ZSTD_initCStream_advanced(zcs, NULL, 0, params, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2958 zcs->cdict = cdict;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2959 return initError;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2960 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2961
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2962 size_t ZSTD_initCStream_usingDict(ZSTD_CStream* zcs, const void* dict, size_t dictSize, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2963 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2964 ZSTD_parameters const params = ZSTD_getParams(compressionLevel, 0, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2965 return ZSTD_initCStream_advanced(zcs, dict, dictSize, params, 0);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2966 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2967
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2968 size_t ZSTD_initCStream_srcSize(ZSTD_CStream* zcs, int compressionLevel, unsigned long long pledgedSrcSize)
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2969 {
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2970 ZSTD_parameters const params = ZSTD_getParams(compressionLevel, pledgedSrcSize, 0);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2971 return ZSTD_initCStream_advanced(zcs, NULL, 0, params, pledgedSrcSize);
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2972 }
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	2973
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2974 size_t ZSTD_initCStream(ZSTD_CStream* zcs, int compressionLevel)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2975 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2976 return ZSTD_initCStream_usingDict(zcs, NULL, 0, compressionLevel);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2977 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2978
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2979 size_t ZSTD_sizeof_CStream(const ZSTD_CStream* zcs)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2980 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2981 if (zcs==NULL) return 0; /* support sizeof on NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2982 return sizeof(zcs) + ZSTD_sizeof_CCtx(zcs->cctx) + ZSTD_sizeof_CDict(zcs->cdictLocal) + zcs->outBuffSize + zcs->inBuffSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2983 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2984
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2985 /====== Compression ======/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2986
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2987 typedef enum { zsf_gather, zsf_flush, zsf_end } ZSTD_flush_e;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2988
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2989 MEM_STATIC size_t ZSTD_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2990 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2991 size_t const length = MIN(dstCapacity, srcSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2992 memcpy(dst, src, length);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2993 return length;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2994 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2995
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2996 static size_t ZSTD_compressStream_generic(ZSTD_CStream* zcs,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2997 void* dst, size_t* dstCapacityPtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2998 const void* src, size_t* srcSizePtr,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	2999 ZSTD_flush_e const flush)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3000 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3001 U32 someMoreWork = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3002 const char* const istart = (const char*)src;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3003 const char* const iend = istart + *srcSizePtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3004 const char* ip = istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3005 char* const ostart = (char*)dst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3006 char* const oend = ostart + *dstCapacityPtr;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3007 char* op = ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3008
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3009 while (someMoreWork) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3010 switch(zcs->stage)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3011 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3012 case zcss_init: return ERROR(init_missing); /* call ZBUFF_compressInit() first ! */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3013
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3014 case zcss_load:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3015 /* complete inBuffer */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3016 { size_t const toLoad = zcs->inBuffTarget - zcs->inBuffPos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3017 size_t const loaded = ZSTD_limitCopy(zcs->inBuff + zcs->inBuffPos, toLoad, ip, iend-ip);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3018 zcs->inBuffPos += loaded;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3019 ip += loaded;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3020 if ( (zcs->inBuffPos==zcs->inToCompress) \|\| (!flush && (toLoad != loaded)) ) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3021 someMoreWork = 0; break; /* not enough input to get a full block : stop there, wait for more */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3022 } }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3023 /* compress current block (note : this stage cannot be stopped in the middle) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3024 { void* cDst;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3025 size_t cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3026 size_t const iSize = zcs->inBuffPos - zcs->inToCompress;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3027 size_t oSize = oend-op;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3028 if (oSize >= ZSTD_compressBound(iSize))
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3029 cDst = op; /* compress directly into output buffer (avoid flush stage) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3030 else
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3031 cDst = zcs->outBuff, oSize = zcs->outBuffSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3032 cSize = (flush == zsf_end) ?
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3033 ZSTD_compressEnd(zcs->cctx, cDst, oSize, zcs->inBuff + zcs->inToCompress, iSize) :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3034 ZSTD_compressContinue(zcs->cctx, cDst, oSize, zcs->inBuff + zcs->inToCompress, iSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3035 if (ZSTD_isError(cSize)) return cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3036 if (flush == zsf_end) zcs->frameEnded = 1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3037 /* prepare next block */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3038 zcs->inBuffTarget = zcs->inBuffPos + zcs->blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3039 if (zcs->inBuffTarget > zcs->inBuffSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3040 zcs->inBuffPos = 0, zcs->inBuffTarget = zcs->blockSize; /* note : inBuffSize >= blockSize */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3041 zcs->inToCompress = zcs->inBuffPos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3042 if (cDst == op) { op += cSize; break; } /* no need to flush */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3043 zcs->outBuffContentSize = cSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3044 zcs->outBuffFlushedSize = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3045 zcs->stage = zcss_flush; /* pass-through to flush stage */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3046 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3047
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3048 case zcss_flush:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3049 { size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3050 size_t const flushed = ZSTD_limitCopy(op, oend-op, zcs->outBuff + zcs->outBuffFlushedSize, toFlush);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3051 op += flushed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3052 zcs->outBuffFlushedSize += flushed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3053 if (toFlush!=flushed) { someMoreWork = 0; break; } /* dst too small to store flushed data : stop there */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3054 zcs->outBuffContentSize = zcs->outBuffFlushedSize = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3055 zcs->stage = zcss_load;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3056 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3057 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3058
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3059 case zcss_final:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3060 someMoreWork = 0; /* do nothing */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3061 break;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3062
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3063 default:
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3064 return ERROR(GENERIC); /* impossible */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3065 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3066 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3067
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3068 *srcSizePtr = ip - istart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3069 *dstCapacityPtr = op - ostart;
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	3070 zcs->inputProcessed += *srcSizePtr;
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3071 if (zcs->frameEnded) return 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3072 { size_t hintInSize = zcs->inBuffTarget - zcs->inBuffPos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3073 if (hintInSize==0) hintInSize = zcs->blockSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3074 return hintInSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3075 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3076 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3077
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3078 size_t ZSTD_compressStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output, ZSTD_inBuffer* input)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3079 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3080 size_t sizeRead = input->size - input->pos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3081 size_t sizeWritten = output->size - output->pos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3082 size_t const result = ZSTD_compressStream_generic(zcs,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3083 (char*)(output->dst) + output->pos, &sizeWritten,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3084 (const char*)(input->src) + input->pos, &sizeRead, zsf_gather);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3085 input->pos += sizeRead;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3086 output->pos += sizeWritten;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3087 return result;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3088 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3089
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3090
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3091 /====== Finalize ======/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3092
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3093 /*! ZSTD_flushStream() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3094 * @return : amount of data remaining to flush */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3095 size_t ZSTD_flushStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3096 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3097 size_t srcSize = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3098 size_t sizeWritten = output->size - output->pos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3099 size_t const result = ZSTD_compressStream_generic(zcs,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3100 (char*)(output->dst) + output->pos, &sizeWritten,
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3101 &srcSize, &srcSize, /* use a valid src address instead of NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3102 zsf_flush);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3103 output->pos += sizeWritten;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3104 if (ZSTD_isError(result)) return result;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3105 return zcs->outBuffContentSize - zcs->outBuffFlushedSize; /* remaining to flush */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3106 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3107
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3108
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3109 size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3110 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3111 BYTE* const ostart = (BYTE*)(output->dst) + output->pos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3112 BYTE* const oend = (BYTE*)(output->dst) + output->size;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3113 BYTE* op = ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3114
30822 b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	3115 if ((zcs->pledgedSrcSize) && (zcs->inputProcessed != zcs->pledgedSrcSize))
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	3116 return ERROR(srcSize_wrong); /* pledgedSrcSize not respected */
b54a2984cdd4 zstd: vendor python-zstandard 0.6.0 Gregory Szorc <gregory.szorc@gmail.com> parents: 30434 diff changeset	3117
30434 2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3118 if (zcs->stage != zcss_final) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3119 /* flush whatever remains */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3120 size_t srcSize = 0;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3121 size_t sizeWritten = output->size - output->pos;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3122 size_t const notEnded = ZSTD_compressStream_generic(zcs, ostart, &sizeWritten, &srcSize, &srcSize, zsf_end); /* use a valid src address instead of NULL */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3123 size_t const remainingToFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3124 op += sizeWritten;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3125 if (remainingToFlush) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3126 output->pos += sizeWritten;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3127 return remainingToFlush + ZSTD_BLOCKHEADERSIZE /* final empty block / + (zcs->checksum 4);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3128 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3129 /* create epilogue */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3130 zcs->stage = zcss_final;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3131 zcs->outBuffContentSize = !notEnded ? 0 :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3132 ZSTD_compressEnd(zcs->cctx, zcs->outBuff, zcs->outBuffSize, NULL, 0); /* write epilogue, including final empty block, into outBuff */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3133 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3134
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3135 /* flush epilogue */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3136 { size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3137 size_t const flushed = ZSTD_limitCopy(op, oend-op, zcs->outBuff + zcs->outBuffFlushedSize, toFlush);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3138 op += flushed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3139 zcs->outBuffFlushedSize += flushed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3140 output->pos += op-ostart;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3141 if (toFlush==flushed) zcs->stage = zcss_init; /* end reached */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3142 return toFlush - flushed;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3143 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3144 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3145
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3146
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3147
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3148 /-===== Pre-defined compression levels =====-/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3149
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3150 #define ZSTD_DEFAULT_CLEVEL 1
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3151 #define ZSTD_MAX_CLEVEL 22
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3152 int ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3153
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3154 static const ZSTD_compressionParameters ZSTD_defaultCParameters[4][ZSTD_MAX_CLEVEL+1] = {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3155 { /* "default" */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3156 /* W, C, H, S, L, TL, strat */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3157 { 18, 12, 12, 1, 7, 16, ZSTD_fast }, /* level 0 - never used */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3158 { 19, 13, 14, 1, 7, 16, ZSTD_fast }, /* level 1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3159 { 19, 15, 16, 1, 6, 16, ZSTD_fast }, /* level 2 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3160 { 20, 16, 17, 1, 5, 16, ZSTD_dfast }, /* level 3.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3161 { 20, 18, 18, 1, 5, 16, ZSTD_dfast }, /* level 4.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3162 { 20, 15, 18, 3, 5, 16, ZSTD_greedy }, /* level 5 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3163 { 21, 16, 19, 2, 5, 16, ZSTD_lazy }, /* level 6 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3164 { 21, 17, 20, 3, 5, 16, ZSTD_lazy }, /* level 7 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3165 { 21, 18, 20, 3, 5, 16, ZSTD_lazy2 }, /* level 8 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3166 { 21, 20, 20, 3, 5, 16, ZSTD_lazy2 }, /* level 9 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3167 { 21, 19, 21, 4, 5, 16, ZSTD_lazy2 }, /* level 10 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3168 { 22, 20, 22, 4, 5, 16, ZSTD_lazy2 }, /* level 11 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3169 { 22, 20, 22, 5, 5, 16, ZSTD_lazy2 }, /* level 12 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3170 { 22, 21, 22, 5, 5, 16, ZSTD_lazy2 }, /* level 13 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3171 { 22, 21, 22, 6, 5, 16, ZSTD_lazy2 }, /* level 14 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3172 { 22, 21, 21, 5, 5, 16, ZSTD_btlazy2 }, /* level 15 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3173 { 23, 22, 22, 5, 5, 16, ZSTD_btlazy2 }, /* level 16 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3174 { 23, 21, 22, 4, 5, 24, ZSTD_btopt }, /* level 17 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3175 { 23, 23, 22, 6, 5, 32, ZSTD_btopt }, /* level 18 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3176 { 23, 23, 22, 6, 3, 48, ZSTD_btopt }, /* level 19 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3177 { 25, 25, 23, 7, 3, 64, ZSTD_btopt2 }, /* level 20 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3178 { 26, 26, 23, 7, 3,256, ZSTD_btopt2 }, /* level 21 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3179 { 27, 27, 25, 9, 3,512, ZSTD_btopt2 }, /* level 22 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3180 },
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3181 { /* for srcSize <= 256 KB */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3182 /* W, C, H, S, L, T, strat */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3183 { 0, 0, 0, 0, 0, 0, ZSTD_fast }, /* level 0 - not used */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3184 { 18, 13, 14, 1, 6, 8, ZSTD_fast }, /* level 1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3185 { 18, 14, 13, 1, 5, 8, ZSTD_dfast }, /* level 2 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3186 { 18, 16, 15, 1, 5, 8, ZSTD_dfast }, /* level 3 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3187 { 18, 15, 17, 1, 5, 8, ZSTD_greedy }, /* level 4.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3188 { 18, 16, 17, 4, 5, 8, ZSTD_greedy }, /* level 5.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3189 { 18, 16, 17, 3, 5, 8, ZSTD_lazy }, /* level 6.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3190 { 18, 17, 17, 4, 4, 8, ZSTD_lazy }, /* level 7 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3191 { 18, 17, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3192 { 18, 17, 17, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3193 { 18, 17, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3194 { 18, 18, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 11.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3195 { 18, 18, 17, 7, 4, 8, ZSTD_lazy2 }, /* level 12.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3196 { 18, 19, 17, 6, 4, 8, ZSTD_btlazy2 }, /* level 13 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3197 { 18, 18, 18, 4, 4, 16, ZSTD_btopt }, /* level 14.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3198 { 18, 18, 18, 4, 3, 16, ZSTD_btopt }, /* level 15.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3199 { 18, 19, 18, 6, 3, 32, ZSTD_btopt }, /* level 16.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3200 { 18, 19, 18, 8, 3, 64, ZSTD_btopt }, /* level 17.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3201 { 18, 19, 18, 9, 3,128, ZSTD_btopt }, /* level 18.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3202 { 18, 19, 18, 10, 3,256, ZSTD_btopt }, /* level 19.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3203 { 18, 19, 18, 11, 3,512, ZSTD_btopt2 }, /* level 20.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3204 { 18, 19, 18, 12, 3,512, ZSTD_btopt2 }, /* level 21.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3205 { 18, 19, 18, 13, 3,512, ZSTD_btopt2 }, /* level 22.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3206 },
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3207 { /* for srcSize <= 128 KB */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3208 /* W, C, H, S, L, T, strat */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3209 { 17, 12, 12, 1, 7, 8, ZSTD_fast }, /* level 0 - not used */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3210 { 17, 12, 13, 1, 6, 8, ZSTD_fast }, /* level 1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3211 { 17, 13, 16, 1, 5, 8, ZSTD_fast }, /* level 2 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3212 { 17, 16, 16, 2, 5, 8, ZSTD_dfast }, /* level 3 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3213 { 17, 13, 15, 3, 4, 8, ZSTD_greedy }, /* level 4 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3214 { 17, 15, 17, 4, 4, 8, ZSTD_greedy }, /* level 5 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3215 { 17, 16, 17, 3, 4, 8, ZSTD_lazy }, /* level 6 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3216 { 17, 15, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 7 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3217 { 17, 17, 17, 4, 4, 8, ZSTD_lazy2 }, /* level 8 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3218 { 17, 17, 17, 5, 4, 8, ZSTD_lazy2 }, /* level 9 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3219 { 17, 17, 17, 6, 4, 8, ZSTD_lazy2 }, /* level 10 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3220 { 17, 17, 17, 7, 4, 8, ZSTD_lazy2 }, /* level 11 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3221 { 17, 17, 17, 8, 4, 8, ZSTD_lazy2 }, /* level 12 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3222 { 17, 18, 17, 6, 4, 8, ZSTD_btlazy2 }, /* level 13.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3223 { 17, 17, 17, 7, 3, 8, ZSTD_btopt }, /* level 14.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3224 { 17, 17, 17, 7, 3, 16, ZSTD_btopt }, /* level 15.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3225 { 17, 18, 17, 7, 3, 32, ZSTD_btopt }, /* level 16.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3226 { 17, 18, 17, 7, 3, 64, ZSTD_btopt }, /* level 17.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3227 { 17, 18, 17, 7, 3,256, ZSTD_btopt }, /* level 18.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3228 { 17, 18, 17, 8, 3,256, ZSTD_btopt }, /* level 19.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3229 { 17, 18, 17, 9, 3,256, ZSTD_btopt2 }, /* level 20.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3230 { 17, 18, 17, 10, 3,256, ZSTD_btopt2 }, /* level 21.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3231 { 17, 18, 17, 11, 3,512, ZSTD_btopt2 }, /* level 22.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3232 },
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3233 { /* for srcSize <= 16 KB */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3234 /* W, C, H, S, L, T, strat */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3235 { 14, 12, 12, 1, 7, 6, ZSTD_fast }, /* level 0 - not used */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3236 { 14, 14, 14, 1, 6, 6, ZSTD_fast }, /* level 1 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3237 { 14, 14, 14, 1, 4, 6, ZSTD_fast }, /* level 2 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3238 { 14, 14, 14, 1, 4, 6, ZSTD_dfast }, /* level 3.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3239 { 14, 14, 14, 4, 4, 6, ZSTD_greedy }, /* level 4.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3240 { 14, 14, 14, 3, 4, 6, ZSTD_lazy }, /* level 5.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3241 { 14, 14, 14, 4, 4, 6, ZSTD_lazy2 }, /* level 6 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3242 { 14, 14, 14, 5, 4, 6, ZSTD_lazy2 }, /* level 7 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3243 { 14, 14, 14, 6, 4, 6, ZSTD_lazy2 }, /* level 8.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3244 { 14, 15, 14, 6, 4, 6, ZSTD_btlazy2 }, /* level 9.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3245 { 14, 15, 14, 3, 3, 6, ZSTD_btopt }, /* level 10.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3246 { 14, 15, 14, 6, 3, 8, ZSTD_btopt }, /* level 11.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3247 { 14, 15, 14, 6, 3, 16, ZSTD_btopt }, /* level 12.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3248 { 14, 15, 14, 6, 3, 24, ZSTD_btopt }, /* level 13.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3249 { 14, 15, 15, 6, 3, 48, ZSTD_btopt }, /* level 14.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3250 { 14, 15, 15, 6, 3, 64, ZSTD_btopt }, /* level 15.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3251 { 14, 15, 15, 6, 3, 96, ZSTD_btopt }, /* level 16.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3252 { 14, 15, 15, 6, 3,128, ZSTD_btopt }, /* level 17.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3253 { 14, 15, 15, 6, 3,256, ZSTD_btopt }, /* level 18.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3254 { 14, 15, 15, 7, 3,256, ZSTD_btopt }, /* level 19.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3255 { 14, 15, 15, 8, 3,256, ZSTD_btopt2 }, /* level 20.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3256 { 14, 15, 15, 9, 3,256, ZSTD_btopt2 }, /* level 21.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3257 { 14, 15, 15, 10, 3,256, ZSTD_btopt2 }, /* level 22.*/
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3258 },
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3259 };
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3260
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3261 /*! ZSTD_getCParams() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3262 * @return ZSTD_compressionParameters structure for a selected compression level, `srcSize` and `dictSize`.
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3263 * Size values are optional, provide 0 if not known or unused */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3264 ZSTD_compressionParameters ZSTD_getCParams(int compressionLevel, unsigned long long srcSize, size_t dictSize)
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3265 {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3266 ZSTD_compressionParameters cp;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3267 size_t const addedSize = srcSize ? 0 : 500;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3268 U64 const rSize = srcSize+dictSize ? srcSize+dictSize+addedSize : (U64)-1;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3269 U32 const tableID = (rSize <= 256 KB) + (rSize <= 128 KB) + (rSize <= 16 KB); /* intentional underflow for srcSizeHint == 0 */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3270 if (compressionLevel <= 0) compressionLevel = ZSTD_DEFAULT_CLEVEL; /* 0 == default; no negative compressionLevel yet */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3271 if (compressionLevel > ZSTD_MAX_CLEVEL) compressionLevel = ZSTD_MAX_CLEVEL;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3272 cp = ZSTD_defaultCParameters[tableID][compressionLevel];
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3273 if (MEM_32bits()) { /* auto-correction, for 32-bits mode */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3274 if (cp.windowLog > ZSTD_WINDOWLOG_MAX) cp.windowLog = ZSTD_WINDOWLOG_MAX;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3275 if (cp.chainLog > ZSTD_CHAINLOG_MAX) cp.chainLog = ZSTD_CHAINLOG_MAX;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3276 if (cp.hashLog > ZSTD_HASHLOG_MAX) cp.hashLog = ZSTD_HASHLOG_MAX;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3277 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3278 cp = ZSTD_adjustCParams(cp, srcSize, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3279 return cp;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3280 }
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3281
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3282 /*! ZSTD_getParams() :
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3283 * same as ZSTD_getCParams(), but @return a `ZSTD_parameters` object (instead of `ZSTD_compressionParameters`).
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3284 * All fields of `ZSTD_frameParameters` are set to default (0) */
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3285 ZSTD_parameters ZSTD_getParams(int compressionLevel, unsigned long long srcSize, size_t dictSize) {
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3286 ZSTD_parameters params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3287 ZSTD_compressionParameters const cParams = ZSTD_getCParams(compressionLevel, srcSize, dictSize);
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3288 memset(&params, 0, sizeof(params));
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3289 params.cParams = cParams;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3290 return params;
2e484bdea8c4 zstd: vendor zstd 1.1.1 Gregory Szorc <gregory.szorc@gmail.com> parents: diff changeset	3291 }

Mercurial > public > mercurial-scm > hg

annotate contrib/python-zstandard/zstd/compress/zstd_compress.c @ 30822:b54a2984cdd4