#ifndef CRC_H
#define CRC_H
#include <stddef.h>

#if __STDC_VERSION__ >= 199901
#include <stdint.h>
typedef uint_least32_t crc32_t;
typedef uint_least16_t crc16_t;
#else
/* don't have C99? */
typedef unsigned short crc16_t;
typedef unsigned crc32_t;
#endif

/* ANSI X3.66 residual */
#define CRC32_RESIDUE 0xdebb20e3UL
#define CRC16_RESIDUE 0xf0b8U

crc32_t crc32_calc(const void *ptr, size_t cnt, crc32_t crc);
crc16_t crc16_calc(const void *ptr, size_t cnt, crc16_t crc);
#endif