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fix #1241

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Ensure that first input position is valid for a match
even during first usage of context
by starting reference at 1
(avoiding the problematic 0).
This commit is contained in:
cyan4973
2018-07-17 18:52:57 +02:00
parent abc02e08ff
commit 9597b438e9
2 changed files with 23 additions and 0 deletions
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tests/fuzzer.c
+20
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@@ -411,6 +411,26 @@ static int basicUnitTests(U32 seed, double compressibility)
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3d : re-using a CCtx should compress the same : ", testNb++);
{ int i;
for (i=0; i<20; i++)
((char*)CNBuffer)[i] = i; /* ensure no match during initial section */
memcpy((char*)CNBuffer + 20, CNBuffer, 10); /* create one match, starting from beginning of sample, which is the difficult case (see #1241) */
for (i=1; i<=19; i++) {
ZSTD_CCtx* const cctx = ZSTD_createCCtx();
size_t size1, size2;
DISPLAYLEVEL(5, "l%i ", i);
size1 = ZSTD_compressCCtx(cctx, compressedBuffer, compressedBufferSize, CNBuffer, 30, i);
CHECK_Z(size1);
size2 = ZSTD_compressCCtx(cctx, compressedBuffer, compressedBufferSize, CNBuffer, 30, i);
CHECK_Z(size2);
CHECK_EQ(size1, size2);
ZSTD_freeCCtx(cctx);
}
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3d : ZSTD_CCtx_getParameter() : ", testNb++);
{ ZSTD_CCtx* const cctx = ZSTD_createCCtx();
ZSTD_outBuffer out = {NULL, 0, 0};