ObjFW  Diff

			table = startTable;
			tableSize = middleTableSize;
		} else {
			table = middleTable;
			tableSize = middleTableSize;
		}

		cLen = _OFUTF8StringDecode(_s->cString + i,
		    _s->cStringLength - i, &c);

		if (cLen <= 0 || c > 0x10FFFF) {
			OFFreeMemory(unicodeString);
			@throw [OFInvalidEncodingException exception];
		}

	}

	j = 0;

	for (i = 0; i < unicodeLen; i++) {
		size_t d;

		if ((d = _OFUTF8StringEncode(unicodeString[i],
		    newCString + j)) == 0) {
			OFFreeMemory(unicodeString);
			OFFreeMemory(newCString);
			@throw [OFInvalidEncodingException exception];
		}
		j += d;
	}

{
	char buffer[4];
	OFUnichar c;
	size_t lenNew;
	ssize_t lenOld;

	if (_s->isUTF8)
		idx = _OFUTF8StringIndexToPosition(_s->cString, idx,
		    _s->cStringLength);

	if (idx >= _s->cStringLength)
		@throw [OFOutOfRangeException exception];

	/* Shortcut if old and new character both are ASCII */
	if (character < 0x80 && !(_s->cString[idx] & 0x80)) {
		_s->hasHash = false;
		_s->cString[idx] = character;
		return;
	}

	if ((lenNew = _OFUTF8StringEncode(character, buffer)) == 0)
		@throw [OFInvalidEncodingException exception];

	if ((lenOld = _OFUTF8StringDecode(_s->cString + idx,
	    _s->cStringLength - idx, &c)) <= 0)
		@throw [OFInvalidEncodingException exception];

	_s->hasHash = false;

	if (lenNew == (size_t)lenOld)
		memcpy(_s->cString + idx, buffer, lenNew);

	if (UTF8StringLength >= 3 &&
	    memcmp(UTF8String, "\xEF\xBB\xBF", 3) == 0) {
		UTF8String += 3;
		UTF8StringLength -= 3;
	}

	switch (_OFUTF8StringCheck(UTF8String, UTF8StringLength, &length)) {
	case 1:
		_s->isUTF8 = true;
		break;
	case -1:
		@throw [OFInvalidEncodingException exception];
	}

	if (UTF8StringLength >= 3 &&
	    memcmp(UTF8String, "\xEF\xBB\xBF", 3) == 0) {
		UTF8String += 3;
		UTF8StringLength -= 3;
	}

	switch (_OFUTF8StringCheck(UTF8String, UTF8StringLength, &length)) {
	case 1:
		_s->isUTF8 = true;
		break;
	case -1:
		@throw [OFInvalidEncodingException exception];
	}

	char *tmp = OFAllocMemory((length * 4) + 1, 1);

	@try {
		size_t j = 0;
		bool isUTF8 = false;

		for (size_t i = 0; i < length; i++) {
			size_t len = _OFUTF8StringEncode(characters[i],
			    tmp + j);

			if (len == 0)
				@throw [OFInvalidEncodingException exception];

			if (len > 1)
				isUTF8 = true;

{
	char *UTF8String;
	int UTF8StringLength;

	if (format == nil)
		@throw [OFInvalidArgumentException exception];

	if ((UTF8StringLength = _OFVASPrintF(&UTF8String, format.UTF8String,
	    arguments)) == -1)
		@throw [OFInvalidFormatException exception];

	@try {
		[self appendUTF8String: UTF8String length: UTF8StringLength];
	} @finally {
		free(UTF8String);
	}
}

- (void)insertString: (OFString *)string atIndex: (size_t)idx
{
	size_t newCStringLength;

	if (idx > _s->length)
		@throw [OFOutOfRangeException exception];

	if (_s->isUTF8)
		idx = _OFUTF8StringIndexToPosition(_s->cString, idx,
		    _s->cStringLength);

	newCStringLength = _s->cStringLength + string.UTF8StringLength;
	_s->hasHash = false;
	_s->cString = OFResizeMemory(_s->cString, newCStringLength + 1, 1);

	memmove(_s->cString + idx + string.UTF8StringLength,

	size_t start = range.location;
	size_t end = range.location + range.length;

	if (range.length > SIZE_MAX - range.location || end > _s->length)
		@throw [OFOutOfRangeException exception];

	if (_s->isUTF8) {
		start = _OFUTF8StringIndexToPosition(_s->cString, start,
		    _s->cStringLength);
		end = _OFUTF8StringIndexToPosition(_s->cString, end,
		    _s->cStringLength);
	}

	memmove(_s->cString + start, _s->cString + end,
	    _s->cStringLength - end);
	_s->hasHash = false;
	_s->length -= range.length;

	if (range.length > SIZE_MAX - range.location || end > _s->length)
		@throw [OFOutOfRangeException exception];

	newLength = _s->length - range.length + replacement.length;

	if (_s->isUTF8) {
		start = _OFUTF8StringIndexToPosition(_s->cString, start,
		    _s->cStringLength);
		end = _OFUTF8StringIndexToPosition(_s->cString, end,
		    _s->cStringLength);
	}

	newCStringLength = _s->cStringLength - (end - start) +
	    replacement.UTF8StringLength;
	_s->hasHash = false;

		@throw [OFInvalidArgumentException exception];

	if (range.length > SIZE_MAX - range.location ||
	    range.location + range.length > self.length)
		@throw [OFOutOfRangeException exception];

	if (_s->isUTF8) {
		range.location = _OFUTF8StringIndexToPosition(_s->cString,
		    range.location, _s->cStringLength);
		range.length = _OFUTF8StringIndexToPosition(
		    _s->cString + range.location, range.length,
		    _s->cStringLength - range.location);
	}

	if (string.UTF8StringLength > range.length)
		return;