pl_nullstreambuf.h

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// -*- C++ -*-

// PLearn (A C++ Machine Learning Library)
// Copyright (C) 2002 Xavier Saint-Mleux <saintmlx@iro.umontreal.ca>
//

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// 
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
// 
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
// 
//  3. The name of the authors may not be used to endorse or promote
//     products derived from this software without specific prior written
//     permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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// This file is part of the PLearn library. For more information on the PLearn
// library, go to the PLearn Web site at www.plearn.org


#ifndef pl_nullstreambuf_INC
#define pl_nullstreambuf_INC

#if __GNUC__ < 3 && !defined(WIN32)
#  include <streambuf.h>
#else
#  include <streambuf>
#endif

namespace PLearn {
using namespace std;

class pl_nullstreambuf : public streambuf
{
private:
#if __GNUC__ < 3 && !defined(WIN32)
  typedef int int_type;
#endif
  static const int_type eof = EOF;

protected:
  virtual int_type underflow() { return pl_nullstreambuf::eof; }

  virtual int_type overflow(int_type meta = pl_nullstreambuf::eof) { return meta; }

public:
  pl_nullstreambuf() :streambuf() {}
};

} // namespace PLearn

#endif //ndef pl_nullstreambuf_INC

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