FileInputPort
{FileInputPort.Close}:int
{FileInputPort.ContentLength}:int
{FileInputPort.ContentType}:symbol
{FileInputPort.init fname:text bufsize:int=512}
{FileInputPort.InitializeIn handle:int bufsize:int}
{FileInputPort.PeekCh}:int
{FileInputPort.ReadCh}:int
{FileInputPort.ReadText t:text n:int}:int
{FileInputPort.Refill}:void