ObjFW  Check-in [0166740a39]

	size_t i, last;
	BOOL in_entity;
	OFMutableString *ret;

	last = 0;
	in_entity = NO;
	ret = [OFMutableString string];

	switch (of_string_check_utf8(string, length)) {
	case 1:
	((OFString*)ret)->isUTF8 = isUTF8;
		((OFString*)ret)->isUTF8 = YES;
		break;
	case -1:
		@throw [OFInvalidEncodingException newWithClass: isa];
	}

	for (i = 0; i < length; i++) {
		if (!in_entity && string[i] == '&') {
			[ret appendCStringWithoutUTF8Checking: string + last
						    length: i - last];
						       length: i - last];

			last = i + 1;
			in_entity = YES;
		} else if (in_entity && string[i] == ';') {
			char *entity = string + last;
			size_t len = i - last;