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zbuff properly supports small dst buffers

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Yann Collet
2015-11-27 14:07:36 +01:00
parent 944042ab7d
commit 31d1806a77
4 changed files with 51 additions and 43 deletions
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lib/zstd_buffered.c
+4 -3
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@@ -204,11 +204,12 @@ static size_t ZBUFF_compressContinue_generic(ZBUFF_CCtx* zbc,
void* cDst;
size_t cSize;
size_t iSize = zbc->inBuffPos - zbc->inToCompress;
if ((size_t)(oend-op) > ZSTD_compressBound(iSize))
size_t oSize = oend-op;
if (oSize >= ZSTD_compressBound(iSize))
cDst = op; /* compress directly into output buffer (avoid flush stage) */
else
cDst = zbc->outBuff;
cSize = ZSTD_compressContinue(zbc->zc, cDst, oend-op, zbc->inBuff + zbc->inToCompress, iSize);
cDst = zbc->outBuff, oSize = zbc->outBuffSize;
cSize = ZSTD_compressContinue(zbc->zc, cDst, oSize, zbc->inBuff + zbc->inToCompress, iSize);
if (ZSTD_isError(cSize)) return cSize;
/* prepare next block */
zbc->inBuffTarget = zbc->inBuffPos + zbc->blockSize;