public override void WriteToPhysical(byte[] buffer, int offset, bool expandStreams)
{
// Write scalar header
byte header = (byte)(IsNil ? 0 : 1);
header |= (byte)(IsNative ? 2 : 0);
header |= (byte)(expandStreams ? 4 : 0);
buffer[offset] = header;
offset++;
if (!IsNil)
{
if (IsNative)
{
if (DataType.IsCompound)
{
_writeValue.WriteToPhysical(buffer, offset, expandStreams);
_writeValue.Dispose();
_writeValue = null;
}
else
{
Streams.IConveyor conveyor = Manager.GetConveyor(DataType);
if (conveyor.IsStreaming)
{
_writeStream.Position = 0;
_writeStream.Read(buffer, offset, (int)_writeStream.Length);
_writeStream.Close();
}
else
{
conveyor.Write(Value, buffer, offset);
}
}
}
else
{
if (expandStreams)
{
_writeStream.Position = 0;
_writeStream.Read(buffer, offset, (int)_writeStream.Length);
_writeStream.Close();
}
else
{
((StreamID)Value).Write(buffer, offset);
}
}
}
}
public override object InternalExecute(Program program, object[] arguments)
{
IDataValue tempValue = arguments[0] as IDataValue;
if (tempValue == null)
{
tempValue = DataValue.FromNative(program.ValueManager, arguments[0]);
}
if (tempValue.IsPhysicalStreaming)
{
using (Stream stream = tempValue.OpenStream())
{
return((int)CRC32Utility.GetCRC32(stream));
}
}
else
{
byte[] physical = new byte[tempValue.GetPhysicalSize(true)];
tempValue.WriteToPhysical(physical, 0, true);
return((int)CRC32Utility.GetCRC32(physical));
}
}