public static void CopyTo(BinaryReader reader, Stream outStream)
{
// This implementation uses a BinaryReader without any Seek operation
// so it can be used with an archive stream
var header = SinHeader.Read(reader);
var dataHeader = MmcfBlock.Read(reader);
var orderedBlocks = dataHeader.DataBlocks.OrderBy(b => b.DataOffset).ToList();
var dummy = reader.ReadInt64BE(); // ??
var pos = 0L;
var firstOffset = orderedBlocks.FirstOrDefault()?.DataOffset ?? 0L;
if (firstOffset > pos)
{
reader.ReadBytes((int)firstOffset); // ??
pos = firstOffset;
}
var totalSize = orderedBlocks.Max(b => b.FileOffset + b.FileLen);
foreach (var block in orderedBlocks)
{
if (pos != block.DataOffset)
{
throw new Exception("Unexpected");
}
var data = reader.ReadBytes((int)block.DataLen);
pos += block.DataLen;
if (block is AddrBlock)
{
// fall through
}
else if (block is LZ4Block lz4Block)
{
var uncompData = new byte[lz4Block.UncompDataLen];
LZ4Codec.Decode(data, uncompData);
data = uncompData;
}
else
{
throw new NotImplementedException();
}
FileInfoBase.ReportProgress(outStream.Length, totalSize);
outStream.Seek(block.FileOffset, SeekOrigin.Begin);
outStream.Write(data, 0, data.Length);
}
}
public BlockImgStream(Stream inStream, TransferList transferList)
{
outStream = TempFileStream.Create();
long total = transferList.TotalBlocks * TransferList.BLOCKSIZE;
var done = 0L;
foreach (var entry in transferList.Entries)
{
done += entry.Perform(inStream, outStream) * TransferList.BLOCKSIZE;
FileInfoBase.ReportProgress(done, total);
}
}
public TarEntryViewModel(TarFileInfo parent, TarArchiveEntry e)
{
this.parent = parent;
Name = e.Key;
getStream = new Lazy <Stream>(delegate
{
using (var srcStream = e.OpenEntryStream())
{
if (Name.EndsWith(".img.lz4"))
{
return(Lz4FileInfo.DecodeLz4(srcStream));
}
return(TempFileStream.CreateFrom(srcStream, done => FileInfoBase.ReportProgress(done, e.Size)));
}
});
}
public ZipEntryViewModel(ZipFileInfo parent, ZipArchiveEntry e)
{
this.parent = parent;
totalSize = e.Size;
Name = e.Key;
getStream = new Lazy <Stream>(delegate
{
var transferList = parent.GetTransferList();
using (var srcStream = e.OpenEntryStream())
{
if (Name.EndsWith(".new.dat"))
{
return(new BlockImgStream(srcStream, transferList));
}
if (Name.EndsWith(".new.dat.br"))
{
return(new BlockImgStream(
new BrotliStream(srcStream, CompressionMode.Decompress), transferList));
}
return(TempFileStream.CreateFrom(srcStream, done => FileInfoBase.ReportProgress(done, totalSize)));
}
});
}
