ddidderr/zstd-rs
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

minor decompression speed gains

Browse Source
This commit is contained in:
Yann Collet
2016-07-30 03:20:47 +02:00
parent 70a9ff4af3
commit 3c6b808870
2 changed files with 8 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/decompress/zstd_decompress.c
+5 -5
View File
@@ -583,7 +583,7 @@ typedef struct {
FSE_DState_t stateLL;
FSE_DState_t stateOffb;
FSE_DState_t stateML;
size_t prevOffset[ZSTD_REP_NUM];
U32 prevOffset[ZSTD_REP_NUM];
} seqState_t;
@@ -629,7 +629,7 @@ static seq_t ZSTD_decodeSequence(seqState_t* seqState)
if (ofCode <= 1) {
if ((llCode == 0) & (offset <= 1)) offset = 1-offset;
if (offset) {
size_t const temp = seqState->prevOffset[offset];
U32 const temp = seqState->prevOffset[offset];
if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1];
seqState->prevOffset[1] = seqState->prevOffset[0];
seqState->prevOffset[0] = offset = temp;
@@ -639,7 +639,7 @@ static seq_t ZSTD_decodeSequence(seqState_t* seqState)
} else {
seqState->prevOffset[2] = seqState->prevOffset[1];
seqState->prevOffset[1] = seqState->prevOffset[0];
seqState->prevOffset[0] = offset;
seqState->prevOffset[0] = (U32)offset;
}
seq.offset = offset;
}
@@ -763,7 +763,7 @@ static size_t ZSTD_decompressSequences(
if (nbSeq) {
seqState_t seqState;
dctx->fseEntropy = 1;
{ U32 i; for (i=0; i<ZSTD_REP_NUM; i++) seqState.prevOffset[i] = dctx->rep[i]; }
memcpy(seqState.prevOffset, dctx->rep, sizeof(seqState.prevOffset));
{ size_t const errorCode = BIT_initDStream(&(seqState.DStream), ip, iend-ip);
if (ERR_isError(errorCode)) return ERROR(corruption_detected); }
FSE_initDState(&(seqState.stateLL), &(seqState.DStream), DTableLL);
@@ -781,7 +781,7 @@ static size_t ZSTD_decompressSequences(
/* check if reached exact end */
if (nbSeq) return ERROR(corruption_detected);
/* save reps for next block */
{ U32 i; for (i=0; i<ZSTD_REP_NUM; i++) dctx->rep[i] = (U32)(seqState.prevOffset[i]); }
memcpy(dctx->rep, seqState.prevOffset, sizeof(seqState.prevOffset));
}
/* last literal segment */