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Fix invalid use of dictionary offcode table

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Fixes #888.
This commit is contained in:
Nick Terrell
2017-10-13 12:47:03 -07:00
parent df6b844b4a
commit 24ac2dbd2a
1 changed files with 6 additions and 0 deletions
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lib/compress/zstd_compress.c
+6
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@@ -1536,6 +1536,12 @@ MEM_STATIC size_t ZSTD_compressSequences(seqStore_t* seqStorePtr,
int const uncompressibleError = (cSize == ERROR(dstSize_tooSmall)) && (srcSize <= dstCapacity); int const uncompressibleError = (cSize == ERROR(dstSize_tooSmall)) && (srcSize <= dstCapacity);
if (ZSTD_isError(cSize) && !uncompressibleError) if (ZSTD_isError(cSize) && !uncompressibleError)
return cSize; return cSize;
/* We check that dictionaries have offset codes available for the first
* block. After the first block, the offcode table might not have large
* enough codes to represent the offsets in the data.
*/
if (entropy->offcode_repeatMode == FSE_repeat_valid)
entropy->offcode_repeatMode = FSE_repeat_check;
/* Check compressibility */ /* Check compressibility */
{ size_t const minGain = ZSTD_minGain(srcSize); /* note : fixed formula, maybe should depend on compression level, or strategy */ { size_t const minGain = ZSTD_minGain(srcSize); /* note : fixed formula, maybe should depend on compression level, or strategy */