agb.c

/* Albion Gold Boost for DOS */

#include <stdio.h>
#include <fcntl.h>
#include <io.h>
#include <sys/types.h>

int main(int argc, char *argv[]) {

	int fd;
	char buf[4];
	unsigned short gold;
	char found;

	if (argc < 2) {
	    printf("agb <filename>\n");
	    return 1;
	}

	fd = open(argv[1], O_RDWR);
	
	if (fd == -1) {
		printf("error: failed to open file\n");
		return 1;
	}

	found = 0;
	while (!eof(fd)) {
	    	read(fd, buf, 4);
		if (buf[0] == 'X' && buf[1] == 'L' && buf[2] == 'D' && buf[3] == '0') {
			found = 1;
			break;
		}
	}

	if (!found) {
	    printf("error: unable to locate xld record.\n");
	    close(fd);
	    return 1;
	}

	lseek(fd, 245, SEEK_CUR);
	lseek(fd, 15, SEEK_CUR);

	read(fd, &gold, sizeof(gold));
	lseek(fd, -1 * sizeof(gold), SEEK_CUR);

	printf("Tom has %d gold. Increasing by 100.\n", gold / 10);
	gold += 1000;
	write(fd, &gold, sizeof(gold));

	close(fd);

	return 0;
}