ObjFW  Diff

{
	uint16_t mode;

	if (extension.count != 3)
		@throw [OFInvalidFormatException exception];

	memcpy(&mode, (char *)extension.items + 1, 2);
	mode = OFFromLittleEndian16(mode);

	[entry->_mode release];
	entry->_mode = nil;

	entry->_mode = [[OFNumber alloc] initWithUnsignedShort: mode];
}

static void
parseGIDUIDExtension(OFLHAArchiveEntry *entry, OFData *extension,
    OFStringEncoding encoding)
{
	uint16_t UID, GID;

	if (extension.count != 5)
		@throw [OFInvalidFormatException exception];

	memcpy(&GID, (char *)extension.items + 1, 2);
	GID = OFFromLittleEndian16(GID);

	memcpy(&UID, (char *)extension.items + 3, 2);
	UID = OFFromLittleEndian16(UID);

	[entry->_GID release];
	entry->_GID = nil;

	[entry->_UID release];
	entry->_UID = nil;

{
	uint32_t modificationDate;

	if (extension.count != 5)
		@throw [OFInvalidFormatException exception];

	memcpy(&modificationDate, (char *)extension.items + 1, 4);
	modificationDate = OFFromLittleEndian32(modificationDate);

	[entry->_modificationDate release];
	entry->_modificationDate = nil;

	entry->_modificationDate = [[OFDate alloc]
	    initWithTimeIntervalSince1970: modificationDate];
}

		_compressionMethod = [[OFString alloc]
		    initWithCString: header + 2
			   encoding: OFStringEncodingASCII
			     length: 5];

		memcpy(&_compressedSize, header + 7, 4);
		_compressedSize = OFFromLittleEndian32(_compressedSize);

		memcpy(&_uncompressedSize, header + 11, 4);
		_uncompressedSize = OFFromLittleEndian32(_uncompressedSize);

		memcpy(&date, header + 15, 4);
		date = OFFromLittleEndian32(date);

		_headerLevel = header[20];
		_extensions = [[OFMutableArray alloc] init];

		switch (_headerLevel) {
		case 0:
		case 1:;

	/* Length. Filled in after we're done. */
	[data increaseCountBy: 2];

	[data addItems: [_compressionMethod
			    cStringWithEncoding: OFStringEncodingASCII]
		 count: 5];

	tmp32 = OFToLittleEndian32(_compressedSize);
	[data addItems: &tmp32 count: sizeof(tmp32)];

	tmp32 = OFToLittleEndian32(_uncompressedSize);
	[data addItems: &tmp32 count: sizeof(tmp32)];

	tmp32 = OFToLittleEndian32((uint32_t)_date.timeIntervalSince1970);
	[data addItems: &tmp32 count: sizeof(tmp32)];

	/* Reserved */
	[data increaseCountBy: 1];

	/* Header level */
	[data addItem: "\x02"];

	/* CRC16 */
	tmp16 = OFToLittleEndian16(_CRC16);
	[data addItems: &tmp16 count: sizeof(tmp16)];

	/* Operating system identifier */
	[data addItem: "U"];

	/* Common header. Contains CRC16, which is written at the end. */
	tmp16 = OFToLittleEndian16(5);
	[data addItems: &tmp16 count: sizeof(tmp16)];
	[data addItem: "\x00"];
	[data increaseCountBy: 2];

	tmp16 = OFToLittleEndian16((uint16_t)fileNameLength + 3);
	[data addItems: &tmp16 count: sizeof(tmp16)];
	[data addItem: "\x01"];
	[data addItems: fileName count: fileNameLength];

	if (directoryNameLength > 0) {
		tmp16 = OFToLittleEndian16((uint16_t)directoryNameLength + 3);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItem: "\x02"];
		[data addItems: directoryName count: directoryNameLength];
	}

	if (_fileComment != nil) {
		size_t fileCommentLength =
		    [_fileComment cStringLengthWithEncoding: encoding];

		if (fileCommentLength > UINT16_MAX - 3)
			@throw [OFOutOfRangeException exception];

		tmp16 = OFToLittleEndian16((uint16_t)fileCommentLength + 3);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItem: "\x3F"];
		[data addItems: [_fileComment cStringWithEncoding: encoding]
			 count: fileCommentLength];
	}

	if (_mode != nil) {
		tmp16 = OFToLittleEndian16(5);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItem: "\x50"];

		tmp16 = OFToLittleEndian16(_mode.unsignedShortValue);
		[data addItems: &tmp16 count: sizeof(tmp16)];
	}

	if (_UID != nil || _GID != nil) {
		if (_UID == nil || _GID == nil)
			@throw [OFInvalidArgumentException exception];

		tmp16 = OFToLittleEndian16(7);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItem: "\x51"];

		tmp16 = OFToLittleEndian16(_GID.unsignedShortValue);
		[data addItems: &tmp16 count: sizeof(tmp16)];

		tmp16 = OFToLittleEndian16(_UID.unsignedShortValue);
		[data addItems: &tmp16 count: sizeof(tmp16)];
	}

	if (_group != nil) {
		size_t groupLength =
		    [_group cStringLengthWithEncoding: encoding];

		if (groupLength > UINT16_MAX - 3)
			@throw [OFOutOfRangeException exception];

		tmp16 = OFToLittleEndian16((uint16_t)groupLength + 3);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItem: "\x52"];
		[data addItems: [_group cStringWithEncoding: encoding]
			 count: groupLength];
	}

	if (_owner != nil) {
		size_t ownerLength =
		    [_owner cStringLengthWithEncoding: encoding];

		if (ownerLength > UINT16_MAX - 3)
			@throw [OFOutOfRangeException exception];

		tmp16 = OFToLittleEndian16((uint16_t)ownerLength + 3);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItem: "\x53"];
		[data addItems: [_owner cStringWithEncoding: encoding]
			 count: ownerLength];
	}

	if (_modificationDate != nil) {
		tmp16 = OFToLittleEndian16(7);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItem: "\x54"];

		tmp32 = OFToLittleEndian32(
		    (uint32_t)_modificationDate.timeIntervalSince1970);
		[data addItems: &tmp32 count: sizeof(tmp32)];
	}

	for (OFData *extension in _extensions) {
		size_t extensionLength = extension.count;

		if (extension.itemSize != 1)
			@throw [OFInvalidArgumentException exception];

		if (extensionLength > UINT16_MAX - 2)
			@throw [OFOutOfRangeException exception];

		tmp16 = OFToLittleEndian16((uint16_t)extensionLength + 2);
		[data addItems: &tmp16 count: sizeof(tmp16)];
		[data addItems: extension.items count: extension.count];
	}

	/* Zero-length extension to terminate */
	[data increaseCountBy: 2];

	headerSize = data.count;

	if (headerSize > UINT16_MAX)
		@throw [OFOutOfRangeException exception];

	/* Now fill in the size and CRC16 for the entire header */
	tmp16 = OFToLittleEndian16(headerSize);
	memcpy([data mutableItemAtIndex: 0], &tmp16, sizeof(tmp16));

	tmp16 = of_crc16(0, data.items, data.count);
	tmp16 = OFToLittleEndian16(tmp16);
	memcpy([data mutableItemAtIndex: 27], &tmp16, sizeof(tmp16));

	[stream writeData: data];

	objc_autoreleasePoolPop(pool);
}