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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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programs/zbufftest.c
+15 -8
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@@ -324,22 +324,29 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
sampleSize = (size_t)1 << sampleSizeLog;
sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
XXH64_update(&crc64, srcBuffer+sampleStart, sampleSize);
memcpy(copyBuffer+totalTestSize, srcBuffer+sampleStart, sampleSize);
readSize = sampleSize;
genSize = cBufferSize - cSize;
/* random size output buffer */
sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
sampleSize = (size_t)1 << sampleSizeLog;
sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
genSize = MIN (cBufferSize - cSize, sampleSize);
errorCode = ZBUFF_compressContinue(zc, cBuffer+cSize, &genSize, srcBuffer+sampleStart, &readSize);
CHECK (ZBUFF_isError(errorCode), "compression error : %s", ZBUFF_getErrorName(errorCode));
CHECK (readSize != sampleSize, "compression test condition not respected : input should be fully consumed")
XXH64_update(&crc64, srcBuffer+sampleStart, readSize);
memcpy(copyBuffer+totalTestSize, srcBuffer+sampleStart, readSize);
cSize += genSize;
totalTestSize += sampleSize;
totalTestSize += readSize;
if ((FUZ_rand(&lseed) & 15) == 0)
{
/* add a few random flushes operations, to mess around */
genSize = cBufferSize - cSize;
sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
sampleSize = (size_t)1 << sampleSizeLog;
sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
genSize = MIN (cBufferSize - cSize, sampleSize);
errorCode = ZBUFF_compressFlush(zc, cBuffer+cSize, &genSize);
CHECK (ZBUFF_isError(errorCode), "flush error : %s", ZBUFF_getErrorName(errorCode));
cSize += genSize;