bin2hex golf

hexgolf.c

int main(int a, char *v[]) {
	sscanf(v[1], "%x", &a);
	void *fi=fopen(v[2], "r"), *fo=fopen(v[3], "w");
	for (unsigned char s=a/256+a, c[32], n; n=fread(c, 1, 32, fi); a+=n, s=a/256+a) {
		fprintf(fo, ":%02X%04X00", n, a);
		for (int i=0; i<n; s+=c[i++]+1) fprintf(fo, "%02X", c[i]);
		fprintf(fo, "%02X\n", (256-s)&255);
	}
	fputs(":00000001FF\n", fo);
}