ZSTD_compressBlock_fast_extDict_generic

函数名称：ZSTD_compressBlock_fast_extDict_generic

函数原型：static void ZSTD_compressBlock_fast_extDict_generic(ZSTD_CCtx *ctx, const void *src, size_t srcSize, const U32 mls)

返回类型：void

参数：

类型	参数	名称
ZSTD_CCtx *	ctx
const void *	src
size_t	srcSize
const U32	mls

1118

hashTable等于hashTable

1119

hBits等于hashLog

1120

seqStorePtr等于seqStore的地址

1121

base等于base

1122

dictBase等于dictBase

1123

istart等于src

1124

ip等于istart

1125

anchor等于istart

1126

lowestIndex等于lowLimit

1127

dictStart等于dictBase加lowestIndex

1128

dictLimit等于dictLimit

1129

lowPrefixPtr等于base加dictLimit

1130

dictEnd等于dictBase加dictLimit

1131

iend等于istart加srcSize

1132

ilimit等于iend减8

1133

offset_1等于rep[0], offset_2等于rep[1]

1136

当ip小于ilimit 循环

1137

h等于ZSTD_hashPtr(ip, hBits, mls)

1138

matchIndex等于hashTable[h]

1139

matchBase等于如果matchIndex小于dictLimit则dictBase否则base

1140

match等于matchBase加matchIndex

1141

curr等于ip减base

1142

repIndex等于curr加1减offset_1

1143

repBase等于如果repIndex小于dictLimit则dictBase否则base

1144

repMatch等于repBase加repIndex

1146

hashTable[h]等于curr

1148

如果dictLimit减1减repIndex大于等于3按位与repIndex大于lowestIndex且ZSTD_read32(repMatch)恒等于ZSTD_read32(ip + 1)则

1150

repMatchEnd等于如果repIndex小于dictLimit则dictEnd否则iend

1151

mLength等于ZSTD_count_2segments() :* can count match length with `ip` & `match` in 2 different segments.* convention : on reaching mEnd, match count continue starting from iStart加EQUAL_READ32

1152

ip自加

1153

! ZSTD_storeSeq() :Store a sequence (literal length, literals, offset code and match length code) into seqStore_t.`offsetCode` : distance to match, or 0 == repCode.`matchCode` : matchLength - MINMATCH

1154

否则

1155

如果matchIndex小于lowestIndex或ZSTD_read32(match)不等于ZSTD_read32(ip)则

1156

ip加等于ip减anchor右移control skip over incompressible data 位的值加1

1157

继续下一循环

1160

matchEnd等于如果matchIndex小于dictLimit则dictEnd否则iend

1161

lowMatchPtr等于如果matchIndex小于dictLimit则dictStart否则lowPrefixPtr

1163

mLength等于ZSTD_count_2segments() :* can count match length with `ip` & `match` in 2 different segments.* convention : on reaching mEnd, match count continue starting from iStart加EQUAL_READ32

1164

当ip大于anchor按位与match大于lowMatchPtr且ip[ - 1]恒等于match[ - 1]循环

1165

ip自减

1166

match自减

1167

mLength自加

1169

offset等于curr减matchIndex

1170

offset_2等于offset_1

1171

offset_1等于offset

1172

! ZSTD_storeSeq() :Store a sequence (literal length, literals, offset code and match length code) into seqStore_t.`offsetCode` : distance to match, or 0 == repCode.`matchCode` : matchLength - MINMATCH

1177

ip加等于mLength

1178

anchor等于ip

1180

如果ip小于等于ilimit则

1182

hashTable[ZSTD_hashPtr(base + curr + 2, hBits, mls)]等于curr加2

1183

hashTable[ZSTD_hashPtr(ip - 2, hBits, mls)]等于ip减2减base

1185

当ip小于等于ilimit 循环

1186

curr2等于ip减base

1187

repIndex2等于curr2减offset_2

1188

repMatch2等于如果repIndex2小于dictLimit则dictBase加repIndex2否则base加repIndex2

1189

如果dictLimit减1减repIndex2大于等于3按位与repIndex2大于lowestIndex且ZSTD_read32(repMatch2)恒等于ZSTD_read32(ip)则

1191

repEnd2等于如果repIndex2小于dictLimit则dictEnd否则iend

1192

repLength2等于ZSTD_count_2segments() :* can count match length with `ip` & `match` in 2 different segments.* convention : on reaching mEnd, match count continue starting from iStart加EQUAL_READ32

1194

tmpOffset等于offset_2

1195

offset_2等于offset_1

1196

offset_1等于tmpOffset

1197

! ZSTD_storeSeq() :Store a sequence (literal length, literals, offset code and match length code) into seqStore_t.`offsetCode` : distance to match, or 0 == repCode.`matchCode` : matchLength - MINMATCH

1198

hashTable[ZSTD_hashPtr(ip, hBits, mls)]等于curr2

1199

ip加等于repLength2

1200

anchor等于ip

1201

继续下一循环

1203

1209

repToConfirm[0]等于offset_1

1210

repToConfirm[1]等于offset_2

1214

lastLLSize等于iend减anchor

1215

内存复制(lit, anchor, lastLLSize)

1216

lit加等于lastLLSize

**调用者**
名称	描述
ZSTD_compressBlock_fast_extDict

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码