LimitedWarning.hh

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//STARTHEADER
// $Id: LimitedWarning.hh 699 2007-06-04 20:20:42Z salam $
//
// Copyright (c) 2005-2006, Matteo Cacciari and Gavin Salam
//
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// This file is part of FastJet.
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#ifndef __FASTJET_LIMITEDWARNING_HH__
#define __FASTJET_LIMITEDWARNING_HH__

#include<iostream>
#include<string>

class LimitedWarning {
public:
  
  LimitedWarning() : _max_warn(_max_warn_default), _n_warn_so_far(0) {}

  LimitedWarning(int max_warn) : _max_warn(max_warn), _n_warn_so_far(0) {}

  void warn(const std::string & warning, std::ostream & ostr = std::cerr) {
    if (_n_warn_so_far < _max_warn) {
      ostr << "WARNING: ";
      ostr << warning;
      _n_warn_so_far++;
      if (_n_warn_so_far == _max_warn) ostr << " (LAST SUCH WARNING)";
      ostr << std::endl;
    }
  }

private:
  int _max_warn, _n_warn_so_far;
  static const int _max_warn_default = 5;
  
};

#endif // __FASTJET_LIMITEDWARNING_HH__