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crc: fix signed overflow

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This fixes a signed overflow from i << 24 when i == 255 by
making i unsigned.  The result of the shift is already
assigned to an variable of unsigned type.

Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 8b19ae0761)

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Mans Rullgard 2011-10-08 01:59:51 +01:00 committed by Reinhard Tartler
parent 48f9a80072
commit 5e3ba60e6f
1 changed files with 1 additions and 1 deletions
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2
libavutil/crc.c
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@ -57,7 +57,7 @@ static AVCRC av_crc_table[AV_CRC_MAX][257];
* @return <0 on failure * @return <0 on failure
*/ */
int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){ int av_crc_init(AVCRC *ctx, int le, int bits, uint32_t poly, int ctx_size){
int i, j; unsigned i, j;
uint32_t c; uint32_t c;
if (bits < 8 || bits > 32 || poly >= (1LL<<bits)) if (bits < 8 || bits > 32 || poly >= (1LL<<bits))