private void FillBase(RarHeader baseHeader)
{
HeadCRC = baseHeader.HeadCRC;
HeaderType = baseHeader.HeaderType;
Flags = baseHeader.Flags;
HeaderSize = baseHeader.HeaderSize;
AdditionalSize = baseHeader.AdditionalSize;
ReadBytes = baseHeader.ReadBytes;
}
internal static RarHeader Create(MarkingBinaryReader reader)
{
try
{
RarHeader header = new RarHeader();
reader.Mark();
header.ReadFromReader(reader);
header.ReadBytes += reader.CurrentReadByteCount;
return(header);
}
catch (EndOfStreamException)
{
return(null);
}
}
private RarHeader ReadNextHeader(Stream stream)
{
MarkingBinaryReader reader = new MarkingBinaryReader(stream);
RarHeader header = RarHeader.Create(reader);
if (header == null)
{
return(null);
}
switch (header.HeaderType)
{
case HeaderType.ArchiveHeader:
{
return(header.PromoteHeader <ArchiveHeader>(reader));
}
case HeaderType.MarkHeader:
{
return(header.PromoteHeader <MarkHeader>(reader));
}
case HeaderType.NewSubHeader:
{
FileHeader fh = header.PromoteHeader <FileHeader>(reader);
switch (StreamingMode)
{
case StreamingMode.Seekable:
{
fh.DataStartPosition = reader.BaseStream.Position;
reader.BaseStream.Position += fh.CompressedSize;
}
break;
case StreamingMode.Streaming:
{
//skip the data because it's useless?
reader.BaseStream.Skip(fh.CompressedSize);
}
break;
default:
{
throw new InvalidRarFormatException("Invalid StreamingMode");
}
}
return(fh);
}
case HeaderType.FileHeader:
{
FileHeader fh = header.PromoteHeader <FileHeader>(reader);
switch (StreamingMode)
{
case StreamingMode.Seekable:
{
fh.DataStartPosition = reader.BaseStream.Position;
reader.BaseStream.Position += fh.CompressedSize;
}
break;
case StreamingMode.Streaming:
{
ReadOnlySubStream ms
= new ReadOnlySubStream(reader.BaseStream, fh.CompressedSize);
fh.PackedStream = ms;
}
break;
default:
{
throw new InvalidRarFormatException("Invalid StreamingMode");
}
}
return(fh);
}
case HeaderType.EndArchiveHeader:
{
return(header.PromoteHeader <EndArchiveHeader>(reader));
}
default:
{
throw new InvalidRarFormatException("Invalid Rar Header: " + header.HeaderType.ToString());
}
}
}
