CoinPresolveForcing.hpp

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/* $Id: CoinPresolveForcing.hpp 1498 2011-11-02 15:25:35Z mjs $ */
// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).

#ifndef CoinPresolveForcing_H
#define CoinPresolveForcing_H

#include "CoinPresolveMatrix.hpp"

#define IMPLIED_BOUND   7

class forcing_constraint_action : public CoinPresolveAction {
  forcing_constraint_action();
  forcing_constraint_action(const forcing_constraint_action& rhs);
  forcing_constraint_action& operator=(const forcing_constraint_action& rhs);
public:
  struct action {
    const int *rowcols;
    const double *bounds;
    int row;
    int nlo;
    int nup;
  };
private:
  const int nactions_;
  // actions_ is owned by the class and must be deleted at destruction
  const action *const actions_;

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

  const char *name() const;

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

  void postsolve(CoinPostsolveMatrix *prob) const;

  virtual ~forcing_constraint_action();
};

#endif