ObjFW  Check-in [f01153154d]

	if (string != NULL)
		[self freeMemory: string];

	len = strlen(str);

	switch (of_string_check_utf8(str, len)) {
	case 0:
		is_utf8 = NO;
		break;
	case 1:
		is_utf8 = YES;
		break;
	case -1:
		string = NULL;
		length = 0;
		is_utf8 = NO;

	string[length] = 0;

	return self;
}

- appendString: (OFString*)str
{
	return [self appendCStringWithoutUTF8Checking: [str cString]];
	[self appendCStringWithoutUTF8Checking: [str cString]];

	if (str->is_utf8)
		is_utf8 = YES;

	return self;
}

- appendWithFormat: (OFString*)fmt, ...
{
	id ret;
	va_list args;

	}

	return self;
}

- initWithString: (OFString*)str
{
	Class c;

	self = [super init];

	string = strdup([str cString]);
	string = (char*)[str cString];
	length = [str cStringLength];

	switch (of_string_check_utf8(string, length)) {
		case 1:
			is_utf8 = YES;
			break;
		case -1:
			c = isa;
			[self dealloc];
			@throw [OFInvalidEncodingException newWithClass: c];
	}

	if ((string = strdup(string)) == NULL) {
		c = isa;
		[self dealloc];
		@throw [OFOutOfMemoryException newWithClass: c
						       size: length + 1];
	}

	@try {
		[self addMemoryToPool: string];
	} @catch (OFException *e) {
		/*
		 * We can't use [super dealloc] on OS X here.
		 * Compiler bug? Anyway, [self dealloc] will do here as we

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

	last = 0;
	in_entity = NO;
	ret = [OFMutableString string];
	ret->is_utf8 = is_utf8;

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

			if (len == 2 && !memcmp(entity, "lt", 2))
				[ret appendString: @"<"];
				[ret appendCStringWithoutUTF8Checking: "<"
							       length: 1];
			else if (len == 2 && !memcmp(entity, "gt", 2))
				[ret appendString: @">"];
				[ret appendCStringWithoutUTF8Checking: ">"
							       length: 1];
			else if (len == 4 && !memcmp(entity, "quot", 4))
				[ret appendString: @"\""];
				[ret appendCStringWithoutUTF8Checking: "\""
							       length: 1];
			else if (len == 4 && !memcmp(entity, "apos", 4))
				[ret appendString: @"'"];
				[ret appendCStringWithoutUTF8Checking: "'"
							       length: 1];
			else if (len == 3 && !memcmp(entity, "amp", 3))
				[ret appendString: @"&"];
				[ret appendCStringWithoutUTF8Checking: "&"
							       length: 1];
			else if (entity[0] == '#') {
				OFAutoreleasePool *pool;
				OFString *tmp;

				pool = [[OFAutoreleasePool alloc] init];
				tmp = parse_numeric_entity(entity, len);