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fixed strict aliasing issue

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tuned threshold
This commit is contained in:
Yann Collet 2018-02-09 13:10:32 -08:00
parent 64ee732694
commit 426944c3e3
1 changed files with 6 additions and 5 deletions
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11
lib/decompress/zstd_decompress.c
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@ -1394,10 +1394,11 @@ static size_t ZSTD_decompressSequencesLong(
static unsigned static unsigned
ZSTD_shareLongOffsets(const FSE_DTable* offTable) ZSTD_getLongOffsetsShare(const FSE_DTable* offTable)
{ {
U32 const tableLog = ((const FSE_DTableHeader*)offTable)[0].tableLog; const void* ptr = offTable;
const FSE_decode_t* table = (const FSE_decode_t*)(offTable + 1); U32 const tableLog = ((const FSE_DTableHeader*)ptr)[0].tableLog;
const FSE_decode_t* table = ((const FSE_decode_t*)ptr) + 1;
U32 const max = 1 << tableLog; U32 const max = 1 << tableLog;
U32 u, total = 0; U32 u, total = 0;
@ -1442,8 +1443,8 @@ static size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
srcSize -= seqHSize; srcSize -= seqHSize;
if (dctx->fParams.windowSize > (1<<24)) { if (dctx->fParams.windowSize > (1<<24)) {
U32 const shareLongOffsets = ZSTD_shareLongOffsets(dctx->entropy.OFTable); U32 const shareLongOffsets = ZSTD_getLongOffsetsShare(dctx->entropy.OFTable);
U32 const minShare = MEM_64bits() ? 12 : 20; U32 const minShare = MEM_64bits() ? 5 : 13;
if (shareLongOffsets >= minShare) if (shareLongOffsets >= minShare)
return ZSTD_decompressSequencesLong(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset); return ZSTD_decompressSequencesLong(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset);
} }