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[FSE] Add division by zero test

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This commit is contained in:
Nick Terrell
2018-07-30 12:57:11 -07:00
parent 9889bca530
commit b9faaa1dc3
1 changed files with 19 additions and 0 deletions
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19
tests/fuzzer.c
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@ -27,6 +27,7 @@
#include <string.h> /* strcmp */
#include <assert.h>
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_compressContinue, ZSTD_compressBlock */
#include "fse.h"
#include "zstd.h" /* ZSTD_VERSION_STRING */
#include "zstd_errors.h" /* ZSTD_getErrorCode */
#include "zstdmt_compress.h"
@ -1423,6 +1424,24 @@ static int basicUnitTests(U32 seed, double compressibility)
}
DISPLAYLEVEL(3, "OK \n");
DISPLAYLEVEL(3, "test%3i : testing FSE_normalizeCount() PR#1255: ", testNb++);
{
short norm[32];
unsigned count[32];
unsigned const tableLog = 5;
size_t const nbSeq = 32;
unsigned const maxSymbolValue = 31;
size_t i;
for (i = 0; i < 32; ++i)
count[i] = 1;
/* Calling FSE_normalizeCount() on a uniform distribution should not
* cause a division by zero.
*/
FSE_normalizeCount(norm, tableLog, count, nbSeq, maxSymbolValue);
}
DISPLAYLEVEL(3, "OK \n");
_end:
free(CNBuffer);
free(compressedBuffer);