/home/coin/SVN-release/CoinAll-1.1.0/CoinUtils/src/CoinPresolveDoubleton.hpp

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// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.

#ifndef CoinPresolveDoubleton_H
#define CoinPresolveDoubleton_H

#define DOUBLETON       5

class doubleton_action : public CoinPresolveAction {
 public:
  struct action {

    double clox;
    double cupx;
    double costx;
    
    double costy;

    double rlo;

    double coeffx;
    double coeffy;

    double *colel;

    int icolx;
    int icoly;
    int row;
    int ncolx;
    int ncoly;
  };

  const int nactions_;
  const action *const actions_;

 private:
  doubleton_action(int nactions,
                      const action *actions,
                      const CoinPresolveAction *next) :
    CoinPresolveAction(next),
    nactions_(nactions), actions_(actions)
{}

 public:
  const char *name() const { return ("doubleton_action"); }

  static const CoinPresolveAction *presolve(CoinPresolveMatrix *,
                                         const CoinPresolveAction *next);
  
  void postsolve(CoinPostsolveMatrix *prob) const;

  ~doubleton_action();
};
#endif

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