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author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2006-04-11 19:09:16 -0400 |
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committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2006-04-11 19:09:16 -0400 |
commit | 72212c137c574b564723327af751c4054c7cfca6 (patch) | |
tree | 13be2da9d4be695002d6ea9c396660c986e5fa5c /crc32.h |
Initial commit
Diffstat (limited to 'crc32.h')
-rw-r--r-- | crc32.h | 21 |
1 files changed, 21 insertions, 0 deletions
@@ -0,0 +1,21 @@ +#ifndef CRC32_H +#define CRC32_H + +/* $Id: crc32.h,v 1.6 2005/11/07 11:15:09 gleixner Exp $ */ + +#include <stdint.h> + +extern const uint32_t crc32_table[256]; + +/* Return a 32-bit CRC of the contents of the buffer. */ + +static inline uint32_t +crc32(uint32_t val, const void *ss, int len) +{ + const unsigned char *s = ss; + while (--len >= 0) + val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8); + return val; +} + +#endif |