From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001 From: James <> Date: Wed, 4 Nov 2015 11:49:21 +0000 Subject: trunk-47381 --- package/system/mtd/src/crc32.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 package/system/mtd/src/crc32.h (limited to 'package/system/mtd/src/crc32.h') diff --git a/package/system/mtd/src/crc32.h b/package/system/mtd/src/crc32.h new file mode 100644 index 0000000..68f8ee4 --- /dev/null +++ b/package/system/mtd/src/crc32.h @@ -0,0 +1,26 @@ +#ifndef CRC32_H +#define CRC32_H + +#include + +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; +} + +static inline unsigned int crc32buf(char *buf, size_t len) +{ + return crc32(0xFFFFFFFF, buf, len); +} + + + +#endif -- cgit v1.2.3