Category : Alternate Operating Systems - Quarterdeck DesqView, CP/M, etc
Archive   : PCCAPP.ZIP
Filename : DATASINK.H

/*
* This file is part of the Choices Operating System
* Developed by: The TAPESTRY Parallel Computing Laboratory
* University of Illinois at Urbana-Champaign
* Department of Computer Science
* 1304 W. Springfield Ave.
* Urbana, IL 61801
*
* Copyright (c) 1987, 1988, 1989, 1990, 1991
* The University of Illinois Board of Trustees.
* All Rights Reserved.
* CONFIDENTIAL INFORMATION. Distribution restricted under license agreement.
*
* Author: Vincent F. Russo ([email protected])
* Contributing Author: Gary M. Johnston ([email protected])
* Contributing Author: Bjorn A. Helgaas ([email protected])
* Project Manager and Principal Investigator: Roy Campbell ([email protected])
*
* Funded by: NSF TAPESTRY Grant No. 1-5-30035, NASA ICLASS Grant
* No. 1-5-25469 and No. NSG1471 and AT&T Metronet Grant No. 1-5-37411.
*/
/*
* DataSink.h: definition of an outputstream-like object
*/

#ifndef DataSink_h
#define DataSink_h
#ifdef __GNUG__
#pragma once
#pragma interface
#endif

#include "FormatAssists.h"
class Object;


/*
* An OutputStream-like object that *should* compile away to nothing.
* An instance of this is used for a debugging sink when DEBUG is not
* defined.
*/
class DataSink {
int dummyToShutUpCfront;
public:
DataSink & operator << ( const char * );
DataSink & operator << ( int );
DataSink & operator << ( unsigned int );
DataSink & operator << ( Object * );
DataSink & operator << ( Object & );
DataSink & operator << ( ProxiableObjectRef & );
DataSink & operator << ( ProxiableObjectStar & );
DataSink & operator << ( char );
void printf( const char * f,
const formatArgs & a1 = *(formatArgs *)0,
const formatArgs & a2 = *(formatArgs *)0,
const formatArgs & a3 = *(formatArgs *)0,
const formatArgs & a4 = *(formatArgs *)0 );
};

extern DataSink BlackHole; // this is defined in FormatAssists.cc


inline DataSink & DataSink::operator << ( const char * ) { return( *this ); }
inline DataSink & DataSink::operator << ( int ) { return( *this ); }
inline DataSink & DataSink::operator << ( unsigned int ) { return( *this ); }
inline DataSink & DataSink::operator << ( Object * ) { return( *this ); }
inline DataSink & DataSink::operator << ( Object & ) { return( *this ); }
inline DataSink & DataSink::operator << ( ProxiableObjectRef & )
{ return( *this ); }
inline DataSink & DataSink::operator << ( ProxiableObjectStar & )
{ return( *this ); }
inline DataSink & DataSink::operator << ( char ) { return( *this ); }

inline DataSink & operator << ( DataSink & ds, asHex & ) { return( ds ); }
inline DataSink & operator << ( DataSink & ds, asAddress & ) { return( ds ); }
inline DataSink & operator << ( DataSink & ds, asOctal & ) { return( ds ); }
inline DataSink & operator << ( DataSink & ds, asBits & ) { return( ds ); }
inline DataSink & operator << ( DataSink & ds, Flush & ) { return( ds ); }

inline void DataSink::printf( const char *, const formatArgs & ,
const formatArgs & , const formatArgs & , const formatArgs & ) { }

#endif /* DataSink_h */