ObjFW  Diff

	memcpy(buffer, [string UTF8String], UTF8StringLength);

	for (size_t i = UTF8StringLength; i < length; i++)
		buffer[i] = '\0';
}

@implementation OFTarArchive: OFObject
+ (instancetype)archiveWithStream: (OFStream *)stream
+ (instancetype)archiveWithStream: (OF_KINDOF(OFStream *))stream
			     mode: (OFString *)mode
{
	return [[[self alloc] initWithStream: stream
					mode: mode] autorelease];
}

#ifdef OF_HAVE_FILES
+ (instancetype)archiveWithPath: (OFString *)path
			   mode: (OFString *)mode
{
	return [[[self alloc] initWithPath: path
				      mode: mode] autorelease];
}
#endif

- initWithStream: (OFStream *)stream
- initWithStream: (OF_KINDOF(OFStream *))stream
	    mode: (OFString *)mode
{
	self = [super init];

	@try {
		_stream = [stream retain];

				uint32_t u32[1024 / sizeof(uint32_t)];
			} buffer;
			bool empty = true;

			if (![_stream isKindOfClass: [OFSeekableStream class]])
				@throw [OFInvalidArgumentException exception];

			[(OFSeekableStream *)stream seekToOffset: -1024
							  whence: SEEK_END];
			[stream seekToOffset: -1024
				      whence: SEEK_END];
			[stream readIntoBuffer: buffer.c
				   exactLength: 1024];

			for (size_t i = 0; i < 1024 / sizeof(uint32_t); i++)
				if (buffer.u32[i] != 0)
					empty = false;

			if (!empty)
				@throw [OFInvalidFormatException exception];

			[(OFSeekableStream *)stream seekToOffset: -1024
							  whence: SEEK_END];
			[stream seekToOffset: -1024
				      whence: SEEK_END];
		}
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;