public WindowReader(Stream patch, Header header)
{
this.header = header;
vcdReader = new VcdReader(patch);
lastWindowLength = 0;
lastWindowOffset = 0;
}
private Header ReadHeader()
{
Header header = new Header();
HeaderFields fields = (HeaderFields)vcdReader.ReadByte();
if (fields.Contains(HeaderFields.NotSupported))
throw new FormatException("unrecognized header indicator bits set");
header.SecondaryCompressor = SecondaryCompressor.None;
if (fields.Contains(HeaderFields.SecondaryCompression))
throw new NotSupportedException("unavailable secondary compressor");
if (fields.Contains(HeaderFields.CodeTable))
throw new NotSupportedException("compressed code table not implemented");
if (fields.Contains(HeaderFields.ApplicationData))
header.ApplicationData = ReadApplicationData();
return header;
}