static char *readString(ut8 *p, int off, int len) {
	if (off < 0 || off >= len) {
		return NULL;
	}
	return r_str_ndup ((const char *)p + off, len - off);
}
static char *readString(ut8 *p, int off, int len) {
	if (off < 0 || off >= len) {
		return NULL;
	}
	return r_str_ndup ((const char *)p + off, len - off);
}