private long ReadBlocksInfoAndDirectory(EndianBinaryReader varReader)
{
byte[] blocksInfoBytes;
if (HeaderInfo.version >= 7)
{
varReader.AlignStream(16);
}
if ((HeaderInfo.flags & (int)ArchiveFlags.kArchiveBlocksInfoAtTheEnd) != 0)
{
var tempPosition = varReader.Position;
{
varReader.Position = varReader.BaseStream.Length - HeaderInfo.compressedBlocksInfoSize;
blocksInfoBytes = varReader.ReadBytes((int)HeaderInfo.compressedBlocksInfoSize);
}
varReader.Position = tempPosition;
}
else //0x40 kArchiveBlocksAndDirectoryInfoCombined
{
blocksInfoBytes = varReader.ReadBytes((int)HeaderInfo.compressedBlocksInfoSize);
}
var blocksInfoCompressedStream = new MemoryStream(blocksInfoBytes);
MemoryStream blocksInfoUncompresseddStream;
switch (HeaderInfo.GetBlocksInfoCompressionType())
{
default: //None
{
blocksInfoUncompresseddStream = blocksInfoCompressedStream;
break;
}
case Compression.CompressionType.kCompressionLzma:
{
blocksInfoUncompresseddStream = new MemoryStream((int)(HeaderInfo.uncompressedBlocksInfoSize));
SevenZipHelper.StreamDecompress(blocksInfoCompressedStream, blocksInfoUncompresseddStream, HeaderInfo.compressedBlocksInfoSize, HeaderInfo.uncompressedBlocksInfoSize);
blocksInfoUncompresseddStream.Position = 0;
blocksInfoCompressedStream.Close();
break;
}
case Compression.CompressionType.kCompressionLz4:
case Compression.CompressionType.kCompressionLz4HC:
{
var uncompressedBytes = new byte[HeaderInfo.uncompressedBlocksInfoSize];
using (var decoder = new Lz4DecoderStream(blocksInfoCompressedStream))
{
decoder.Read(uncompressedBytes, 0, uncompressedBytes.Length);
}
blocksInfoUncompresseddStream = new MemoryStream(uncompressedBytes);
break;
}
}
using (var blocksInfoReader = new EndianBinaryReader(blocksInfoUncompresseddStream))
{
var uncompressedDataHash = blocksInfoReader.ReadBytes(16);
var blocksInfoCount = blocksInfoReader.ReadInt32();
BlocksInfo = new List <StorageBlock>(blocksInfoCount);
for (int i = 0; i < blocksInfoCount; i++)
{
var tempBlock = new StorageBlock().Parse(blocksInfoReader);
BlocksInfo.Add(tempBlock);
}
var nodesCount = blocksInfoReader.ReadInt32();
DirectoryInfo = new List <Node>(nodesCount);
for (int i = 0; i < nodesCount; i++)
{
var tempDirInfo = new Node().Parse(blocksInfoReader);
DirectoryInfo.Add(tempDirInfo);
}
}
return(varReader.Position);
}
