ObjFW  Diff

@interface OFZIPArchive_FileStream: OFStream
{
	OFStream *_stream;
	OFFile *_file;
	OFZIPArchive_LocalFileHeader *_localFileHeader;
	bool _hasDataDescriptor;
	uint64_t _size;
	uint32_t _CRC32;
	bool _atEndOfStream;
}

- initWithArchiveFile: (OFString*)path
	       offset: (off_t)offset
      localFileHeader: (OFZIPArchive_LocalFileHeader*)localFileHeader;

{
	void *pool = objc_autoreleasePoolPush();
	size_t i;

	if ((off_t)_centralDirectoryOffset != _centralDirectoryOffset)
		@throw [OFOutOfRangeException exception];

	[_file seekToOffset: (off_t)_centralDirectoryOffset
		     whence: SEEK_SET];

	_entries = [[OFMutableArray alloc] init];
	_pathToEntryMap = [[OFMutableDictionary alloc] init];

	for (i = 0; i < _centralDirectoryEntries; i++) {
		OFZIPArchiveEntry *entry = [[[OFZIPArchiveEntry alloc]

							       mode: @"rb"];
	}

	offset = [entry OF_localFileHeaderOffset];
	if ((off_t)offset != offset)
		@throw [OFOutOfRangeException exception];

	[_file seekToOffset: (off_t)offset
		     whence: SEEK_SET];
	localFileHeader = [[[OFZIPArchive_LocalFileHeader alloc]
	    initWithFile: _file] autorelease];

	if (![localFileHeader matchesEntry: entry])
		@throw [OFInvalidFormatException exception];

			if (~_CRC32 != _localFileHeader->_CRC32)
				@throw [OFChecksumFailedException exception];

			return 0;
		}

		min = (length < _size ? length : (size_t)_size);
		ret = [_stream readIntoBuffer: buffer
				       length: min];
		_size -= ret;
	}

	_CRC32 = crc32(_CRC32, buffer, ret);

	return ret;
}
@end