AuroraMiddleware/zstd
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Merge pull request #267 from inikep/dev08

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fixed ZSTD_compressBlock_opt_extDict_generic
This commit is contained in:
Yann Collet 2016-07-31 22:00:16 +02:00 committed by GitHub
commit c55eb18c11
1 changed files with 2 additions and 2 deletions
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4
lib/compress/zstd_opt.h
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@ -753,7 +753,7 @@ void ZSTD_compressBlock_opt_extDict_generic(ZSTD_CCtx* ctx,
const U32 repIndex = (U32)(current - rep[i]);
const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
const BYTE* const repMatch = repBase + repIndex;
if ((rep[i]<(U32)(ip-prefixStart))
if ( (rep[i] <= current)
&& (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex>lowestIndex)) /* intentional overflow */
&& (MEM_readMINMATCH(ip, minMatch) == MEM_readMINMATCH(repMatch, minMatch)) ) {
/* repcode detected we should take it */
@ -856,7 +856,7 @@ void ZSTD_compressBlock_opt_extDict_generic(ZSTD_CCtx* ctx,
const U32 repIndex = (U32)(current+cur - opt[cur].rep[i]);
const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
const BYTE* const repMatch = repBase + repIndex;
if ((opt[cur].rep[i]<(U32)(ip-prefixStart))
if ( (opt[cur].rep[i] <= current+cur)
&& (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex>lowestIndex)) /* intentional overflow */
&& (MEM_readMINMATCH(inr, minMatch) == MEM_readMINMATCH(repMatch, minMatch)) ) {
/* repcode detected */