public virtual void ReadExtras(byte[] buffer)
{
if (buffer.Length > Header.ExtrasOffset)
{
var format = new byte();
var flags = Converter.ToByte(buffer, Header.ExtrasOffset);
Converter.SetBit(ref format, 0, Converter.GetBit(flags, 0));
Converter.SetBit(ref format, 1, Converter.GetBit(flags, 1));
Converter.SetBit(ref format, 2, Converter.GetBit(flags, 2));
Converter.SetBit(ref format, 3, Converter.GetBit(flags, 3));
var compression = new byte();
Converter.SetBit(ref compression, 4, Converter.GetBit(flags, 4));
Converter.SetBit(ref compression, 5, Converter.GetBit(flags, 5));
Converter.SetBit(ref compression, 6, Converter.GetBit(flags, 6));
var typeCode = (TypeCode)(Converter.ToUInt16(buffer, 26) & 0xff);
Format = (DataFormat)format;
Compression = (Compression)compression;
Flags.DataFormat = Format;
Flags.Compression = Compression;
Flags.TypeCode = typeCode;
Expires = Converter.ToUInt32(buffer, 25);
}
}
public virtual byte[] CreateExtras()
{
var extras = new byte[8];
var format = (byte)GetFormat();
const byte compression = (byte)Compression.None;
Converter.SetBit(ref extras[0], 0, Converter.GetBit(format, 0));
Converter.SetBit(ref extras[0], 1, Converter.GetBit(format, 1));
Converter.SetBit(ref extras[0], 2, Converter.GetBit(format, 2));
Converter.SetBit(ref extras[0], 3, Converter.GetBit(format, 3));
Converter.SetBit(ref extras[0], 4, false);
Converter.SetBit(ref extras[0], 5, Converter.GetBit(compression, 0));
Converter.SetBit(ref extras[0], 6, Converter.GetBit(compression, 1));
Converter.SetBit(ref extras[0], 7, Converter.GetBit(compression, 2));
var typeCode = (ushort)Type.GetTypeCode(typeof(T));
Converter.FromUInt16(typeCode, extras, 2);
Converter.FromUInt32(Expires, extras, 4);
Format = (DataFormat)format;
Compression = compression;
Flags.DataFormat = Format;
Flags.Compression = Compression;
Flags.TypeCode = (TypeCode)typeCode;
return(extras);
}