/* Public domain */

#ifndef __CRC_H__
#define __CRC_H__

#if THINK_C

extern const unsigned short crc16_table[];
extern const unsigned long crc32_table[];

#define UpdateCRC(b, c) (crc16_table[(((unsigned short)c >> 8) & 0xff) ^ \
  (unsigned short)(b)] ^ ((unsigned short)c << 8))
#define UpdateCRC32(b, c) (crc32_table[((unsigned long)c ^ \
  (unsigned short)(b)) & 0xff] ^ (unsigned long)((unsigned long)c >> 8))

#else

unsigned short UpdateCRC(unsigned char b, unsigned short crc);
unsigned long UpdateCRC32(unsigned char b, unsigned long crc);

#endif

#endif /* __CRC_H__ */