package/mtd/src/crc32.h

   1 #ifndef CRC32_H
   2 #define CRC32_H
   3
   4 #include <stdint.h>
   5
   6 extern const uint32_t crc32_table[256];
   7
   8 /* Return a 32-bit CRC of the contents of the buffer. */
   9
  10 static inline uint32_t
  11 crc32(uint32_t val, const void *ss, int len)
  12 {
  13         const unsigned char *s = ss;
  14         while (--len >= 0)
  15                 val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
  16         return val;
  17 }
  18
  19 static inline unsigned int crc32buf(char *buf, size_t len)
  20 {
  21         return crc32(0xFFFFFFFF, buf, len);
  22 }
  23
  24
  25
  26 #endif