hex to int :D

frog.c

int stli(char *c) {
	int ret = 0;
	while (*c != 0) {
		ret = ret << 4;
		if(*c >= '1' && *c <= '9') {
			ret += *c - 48;
		}
		if(*c >= 'a' && *c <= 'f') {
			ret += *c - 87;
		}
		c++;
	}
	return ret;
}