diff options
Diffstat (limited to 'package/mtd/src/crc32.h')
| -rw-r--r-- | package/mtd/src/crc32.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/package/mtd/src/crc32.h b/package/mtd/src/crc32.h new file mode 100644 index 0000000000..ee3145bc15 --- /dev/null +++ b/package/mtd/src/crc32.h @@ -0,0 +1,19 @@ +#ifndef CRC32_H +#define CRC32_H + +#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 |