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Avoid Undefined Behavior in Match Ptr Calculation

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W. Felix Handte
2018-05-23 17:53:03 -04:00
parent a44ab3b475
commit 9c92223468
1 changed files with 3 additions and 3 deletions
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lib/compress/zstd_fast.c
+3 -3
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@@ -99,10 +99,10 @@ size_t ZSTD_compressBlock_fast_generic(
U32 const matchIndex = hashTable[h]; U32 const matchIndex = hashTable[h];
const BYTE* match = base + matchIndex; const BYTE* match = base + matchIndex;
const U32 repIndex = current + 1 - offset_1; const U32 repIndex = current + 1 - offset_1;
const BYTE* repBase = (dictMode == ZSTD_dictMatchState const BYTE* repMatch = (dictMode == ZSTD_dictMatchState
&& repIndex < prefixLowestIndex) ? && repIndex < prefixLowestIndex) ?
dictBase - dictIndexDelta : base; dictBase + (repIndex - dictIndexDelta) :
const BYTE* repMatch = repBase + repIndex; base + repIndex;
hashTable[h] = current; /* update hash table */ hashTable[h] = current; /* update hash table */
if (dictMode == ZSTD_dictMatchState if (dictMode == ZSTD_dictMatchState