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fixed: tree not updated after finding very long rep matches

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inikep
2016-08-10 15:00:30 +02:00
parent 7132fb15ba
commit 98e08cbe34
1 changed files with 5 additions and 0 deletions
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lib/compress/zstd_compress.c
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@@ -2205,8 +2205,13 @@ static ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, int
static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc, void* dst, size_t dstCapacity, const void* src, size_t srcSize) static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc, void* dst, size_t dstCapacity, const void* src, size_t srcSize)
{ {
ZSTD_blockCompressor const blockCompressor = ZSTD_selectBlockCompressor(zc->params.cParams.strategy, zc->lowLimit < zc->dictLimit); ZSTD_blockCompressor const blockCompressor = ZSTD_selectBlockCompressor(zc->params.cParams.strategy, zc->lowLimit < zc->dictLimit);
const BYTE* const base = zc->base;
const BYTE* const istart = (const BYTE*)src;
const U32 current = (U32)(istart-base);
if (srcSize < MIN_CBLOCK_SIZE+ZSTD_blockHeaderSize+1) return 0; /* don't even attempt compression below a certain srcSize */ if (srcSize < MIN_CBLOCK_SIZE+ZSTD_blockHeaderSize+1) return 0; /* don't even attempt compression below a certain srcSize */
ZSTD_resetSeqStore(&(zc->seqStore)); ZSTD_resetSeqStore(&(zc->seqStore));
if (current > zc->nextToUpdate + 384)
zc->nextToUpdate = current - MIN(192, (U32)(current - zc->nextToUpdate - 384)); /* update tree not updated after finding very long rep matches */
blockCompressor(zc, src, srcSize); blockCompressor(zc, src, srcSize);
return ZSTD_compressSequences(zc, dst, dstCapacity, srcSize); return ZSTD_compressSequences(zc, dst, dstCapacity, srcSize);
} }