CoinPresolveSingleton.hpp

Go to the documentation of this file.

/* $Id: CoinPresolveSingleton.hpp 2083 2019-01-06 19:38:09Z unxusr $ */
// 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 CoinPresolveSingleton_H
#define CoinPresolveSingleton_H
#define SLACK_DOUBLETON 2
#define SLACK_SINGLETON 8

//const int MAX_SLACK_DOUBLETONS        = 1000;

class slack_doubleton_action : public CoinPresolveAction {
  struct action {
    double clo;
    double cup;

    double rlo;
    double rup;

    double coeff;

    int col;
    int row;
  };

  const int nactions_;
  const action *const actions_;

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

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

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

  void postsolve(CoinPostsolveMatrix *prob) const;

  virtual ~slack_doubleton_action() { deleteAction(actions_, action *); }
};
class slack_singleton_action : public CoinPresolveAction {
  struct action {
    double clo;
    double cup;

    double rlo;
    double rup;

    double coeff;

    int col;
    int row;
  };

  const int nactions_;
  const action *const actions_;

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

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

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

  void postsolve(CoinPostsolveMatrix *prob) const;

  virtual ~slack_singleton_action() { deleteAction(actions_, action *); }
};
#endif

/* vi: softtabstop=2 shiftwidth=2 expandtab tabstop=2
*/