/*
**  CRC.H - header file for SNIPPETS CRC and checksum functions
 * http://web.archive.org/web/20080303093609/http://c.snippets.org/snip_lister.php?fname=crc.h
*/

#ifndef CRC__H
#define CRC__H

#include <stdlib.h>           /* For size_t                 */
#include "sniptype.h"         /* For BYTE, WORD, DWORD      */

/*
**  File: ARCCRC16.C
*/

void init_crc_table(void);
WORD crc_calc(WORD crc, char* buf, unsigned nbytes);
void do_file(char* fn);

/*
**  File: CRC-16.C
*/

WORD crc16(char* data_p, WORD length);

/*
**  File: CRC-16F.C
*/

WORD updcrc(WORD icrc, BYTE* icp, size_t icnt);

/*
**  File: CRC_32.C
*/

#define UPDC32(octet, crc) (crc_32_tab[((crc)\
     ^ ((BYTE)octet)) & 0xff] ^ ((crc) >> 8))

DWORD updateCRC32(unsigned char ch, DWORD crc);
Boolean_T crc32file(char* name, DWORD* crc, long* charcnt);
DWORD crc32buf(char* buf, size_t len);

/*
**  File: CHECKSUM.C
*/

unsigned checksum(void* buffer, size_t len, unsigned int seed);

/*
**  File: CHECKEXE.C
*/

void checkexe(char* fname);


#endif /* CRC__H */