ObjFW  Check-in [b10933a514]

 *
 * @brief A class which represents an entry of a tar archive.
 */
@interface OFTarArchiveEntry: OFStream
{
	OFStream *_stream;
	bool _atEndOfStream;
	OFString *_name;
	OFString *_fileName;
	uint32_t _mode;
	uint64_t _size, _toRead;
	OFDate *_modificationDate;
	of_tar_archive_entry_type_t _type;
	OFString *_targetName;
	OFString *_targetFileName;
}

/*!
 * The name of the entry.
 * The file name of the entry.
 */
@property (readonly, copy) OFString *name;
@property (readonly, copy) OFString *fileName;

/*!
 * The mode of the entry.
 */
@property (readonly) uint32_t mode;

/*!

 * The type of the archive entry.
 *
 * See @ref of_tar_archive_entry_type_t.
 */
@property (readonly) of_tar_archive_entry_type_t type;

/*!
 * The name of the target (for a hard link or symbolic link).
 * The file name of the target (for a hard link or symbolic link).
 */
@property (readonly, copy) OFString *targetName;
@property (readonly, copy) OFString *targetFileName;
@end

OF_ASSUME_NONNULL_END

	if (value > max)
		@throw [OFOutOfRangeException exception];

	return value;
}

@implementation OFTarArchiveEntry
@synthesize name = _name, mode = _mode, size = _size;
@synthesize fileName = _fileName, mode = _mode, size = _size;
@synthesize modificationDate = _modificationDate, type = _type;
@synthesize targetName = _targetName;
@synthesize targetFileName = _targetFileName;

- (instancetype)OF_initWithHeader: (char[512])header
			   stream: (OFStream*)stream
{
	self = [super init];

	@try {
		void *pool = objc_autoreleasePoolPush();

		_stream = [stream retain];

		_name = [stringFromBuffer(header, 100) copy];
		_fileName = [stringFromBuffer(header, 100) copy];
		_mode = (uint32_t)octalValueFromBuffer(
		    header + 100, 8, UINT32_MAX);
		_size = _toRead = (size_t)octalValueFromBuffer(
		    header + 124, 12, UINT64_MAX);
		_modificationDate = [[OFDate alloc]
		    initWithTimeIntervalSince1970:
		    (of_time_interval_t)octalValueFromBuffer(
		    header + 136, 12, UINTMAX_MAX)];
		_type = header[156];
		_targetName = [stringFromBuffer(header + 157, 100) copy];
		_targetFileName = [stringFromBuffer(header + 157, 100) copy];

		if (_type == '\0')
			_type = OF_TAR_ARCHIVE_ENTRY_TYPE_FILE;

		objc_autoreleasePoolPop(pool);
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[_stream release];
	[_name release];
	[_fileName release];
	[_modificationDate release];
	[_targetName release];
	[_targetFileName release];

	[super dealloc];
}

- (size_t)lowlevelReadIntoBuffer: (void*)buffer
			  length: (size_t)length
{
	size_t ret;

	if (_atEndOfStream)
		@throw [OFReadFailedException exceptionWithObject: self
						  requestedLength: length];

	if ((uint64_t)length > _toRead)
		length = (size_t)_toRead;

	ret = [_stream readIntoBuffer: buffer
			       length: length];

	_toRead -= ret;

	if (ret == 0)
		_atEndOfStream = true;

	_toRead -= ret;

	return ret;
}

- (bool)lowlevelIsAtEndOfStream
{
	return _atEndOfStream;