ObjFW  Diff

		@throw [OFOutOfRangeException exception];

	commentLength = [_fileComment cStringLengthWithEncoding: encoding];
	if (commentLength > UINT16_MAX)
		@throw [OFOutOfRangeException exception];

	fileNameLength = [_fileName cStringLengthWithEncoding: encoding];
	if (fileNameLength > UINT8_MAX - 1)
		@throw [OFOutOfRangeException exception];

	directoryNameLength =
	    [_directoryName cStringLengthWithEncoding: encoding];
	if (directoryNameLength > UINT8_MAX - 1)
		@throw [OFOutOfRangeException exception];

	[data addItems: "\xDC\xA7\xC4\xFD" count: 4];
	/* Header type */
	[data addItem: "\x02"];
	[data addItem: &_compressionMethod];

	/*
	 * CRC16 is filled when writing the next header, as the CRC needs to
	 * include the next header offset.
	 */
	[data increaseCountBy: 2];

	/* Include \0 */
	if (fileNameLength > 0)
		fileNameLength++;
	if (directoryNameLength > 0)
		directoryNameLength++;

	tmp8 = (uint8_t)fileNameLength;
	[data addItem: &tmp8];
	tmp8 = (uint8_t)directoryNameLength;
	[data addItem: &tmp8];

	[data addItems: [_fileName cStringWithEncoding: encoding]
		 count: fileNameLength];