Function acl_strrncmp

lib_acl/src/stdlib/string/acl_strcasecmp.c:93–130

}

int acl_strrncmp(const char *s1, const char *s2, size_t n)
{
	if (n != 0) {
		const unsigned char *us1, *us2;

		if (*s1 == 0) {
			if (*s2 == 0)
				return (0);
			return (-(*s2));
		}
		if (*s2 == 0) {
			if (*s1 == 0)
				return (0);
			return (-(*s1));
		}

		us1 = (const unsigned char *) s1 + strlen(s1) - 1;
		us2 = (const unsigned char *) s2 + strlen(s2) - 1;

		do {
			if (*us1 != *us2)
				return (*us1 - *us2);
			if (us1 == (const unsigned char*) s1) {
				if (us2 == (const unsigned char*) s2 || n == 1)
					break;
				return (-(*--us2));
			}
			if (us2 == (const unsigned char*) s2) {
				if (us1 == (const unsigned char*) s1 || n == 1)
					break;
				return (-(*--us1));
			}
			us1--;
			us2--;
		} while (--n != 0);
	}
	return (0);
}