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added additional condition so large offsets into the dictionary are not generated past windowSize

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Paul Cruz
2017-06-23 15:54:51 -07:00
parent 2085375816
commit 3a295a91f8
1 changed files with 2 additions and 1 deletions
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tests/decodecorpus.c
+2 -1
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@@ -675,11 +675,12 @@ static U32 generateSequences(U32* seed, frame_t* frame, seqStore_t* seqStore,
do { do {
if (RAND(seed) & 7) { if (RAND(seed) & 7) {
/* do a normal offset */ /* do a normal offset */
U32 const dataDecompressed = (U32)((BYTE*)srcPtr-(BYTE*)frame->srcStart);
offset = (RAND(seed) % offset = (RAND(seed) %
MIN(frame->header.windowSize, MIN(frame->header.windowSize,
(size_t)((BYTE*)srcPtr - (BYTE*)frame->srcStart))) + (size_t)((BYTE*)srcPtr - (BYTE*)frame->srcStart))) +
1; 1;
if (info.useDict && (RAND(seed) & 1) && i + 1 != numSequences) { if (info.useDict && (RAND(seed) & 1) && i + 1 != numSequences && dataDecompressed < frame->header.windowSize) {
/* need to occasionally generate offsets that go past the start */ /* need to occasionally generate offsets that go past the start */
/* including i+1 != numSequences because the last sequences has to adhere to predetermined contentSize */ /* including i+1 != numSequences because the last sequences has to adhere to predetermined contentSize */
U32 lenPastStart = (RAND(seed) % info.dictContentSize) + 1; U32 lenPastStart = (RAND(seed) % info.dictContentSize) + 1;