public void Begin(Action<ulong, Stream> callback)
{
if (VersionManifest == null)
ReadManifest();
_stream.Seek(0, SeekOrigin.Begin);
using (var filteredStream = DoInputFiltering(_stream))
{
_streamIds.Zip(_streamSizes, (id, size) =>
{
// ReSharper disable once AccessToDisposedClosure
var bounded = new BoundedStream(filteredStream, size);
callback(id, bounded);
});
}
}
public List<FileSystemObject> ReadBaseObjects()
{
if (VersionManifest == null)
ReadManifest();
Debug.Assert(VersionManifest != null);
BaseObjects = new List<FileSystemObject>();
_stream.Seek(_baseObjectsOffset, SeekOrigin.Begin);
using (var boundedStream = new BoundedStream(_stream, _manifestOffset - _baseObjectsOffset))
using (var filteredStream = DoInputFiltering(boundedStream))
BaseObjects.AddRange(
VersionManifest.ArchiveMetadata.EntrySizes
.Select(entrySize => new BoundedStream(filteredStream, entrySize))
.Select(Serializer.Deserialize<FileSystemObject>)
);
return BaseObjects;
}
public VersionManifest ReadManifest()
{
if (_manifestOffset < 0)
{
long start = -8 - 256/8;
_stream.Seek(start, SeekOrigin.End);
var temp = new byte[8];
var bytesRead = _stream.Read(temp, 0, 8);
if (bytesRead != temp.Length)
throw new InvalidDataException();
_manifestSize = BitConverter.ToInt64(temp, 0);
start -= _manifestSize;
_manifestOffset = _stream.Seek(start, SeekOrigin.End);
}
else
_stream.Seek(_manifestOffset, SeekOrigin.Begin);
using (var boundedStream = new BoundedStream(_stream, _manifestSize))
using (var filteredStream = DoInputFiltering(boundedStream, false))
VersionManifest = Serializer.Deserialize<VersionManifest>(filteredStream);
VersionManifest.ArchiveMetadata.EnsureNonNull();
_baseObjectsOffset = _manifestOffset - VersionManifest.ArchiveMetadata.EntriesSizeInArchive;
_streamIds = new List<ulong>(VersionManifest.ArchiveMetadata.StreamIds);
_streamSizes = new List<long>(VersionManifest.ArchiveMetadata.StreamSizes);
return VersionManifest;
}