ObjFW  Diff

	while (i < length) {
		of_unichar_t c;
		size_t cLen;

		cLen = of_string_utf8_to_unicode(string + i, length - i, &c);

		if (cLen == 0 || c > 0x10FFFF) {
		if (cLen == 0 || c > 0x10FFFF)
			free(ret);
			@throw [OFInvalidEncodingException newWithClass: isa];
		}

		ret[j++] = c;
		i += cLen;
	}

	ret[j] = 0;