/* crc.c; do crc calculation. */

#include <stdio.h>
#include "hexbin.h"
#include "crc.h"
#include "../util/masks.h"
#include "globals.h"

#include <stdlib.h>

uint32_t crc;

#ifdef HQX
void 
comp_q_crc (register unsigned int c)
{
    unsigned char cc = c;

    crc = binhex_updcrc(crc, &cc, 1);
}

void 
comp_q_crc_n (register unsigned char *s, register unsigned char *e)
{
    crc = binhex_updcrc(crc, s, e - s);
}
#endif /* HQX */

void 
verify_crc (uint32_t calc_crc, uint32_t file_crc)
{
    calc_crc &= WORDMASK;
    file_crc &= WORDMASK;

    if(calc_crc != file_crc) {
        (void)fprintf(stderr, "CRC mismatch: got 0x%04x, need 0x%04x\n",
		file_crc, calc_crc);
#ifdef SCAN
	do_error("hexbin: CRC error");
#endif /* SCAN */
	exit(1);
    }
}