CoinPresolveSubst.hpp

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/* $Id: CoinPresolveSubst.hpp 1562 2012-11-24 00:36:15Z lou $ */
// 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 CoinPresolveSubst_H
#define CoinPresolveSubst_H

#define SUBST_ROW       21

#include "CoinPresolveMatrix.hpp"

class subst_constraint_action : public CoinPresolveAction {
private:
  subst_constraint_action();
  subst_constraint_action(const subst_constraint_action& rhs);
  subst_constraint_action& operator=(const subst_constraint_action& rhs);

  struct action {
    double *rlos;
    double *rups;

    double *coeffxs;
    int *rows;
    
    int *ninrowxs;
    int *rowcolsxs;
    double *rowelsxs;

    const double *costsx;
    int col;
    int rowy;

    int nincol;
  };

  const int nactions_;
  // actions_ is owned by the class and must be deleted at destruction
  const action *const actions_;

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

 public:
  const char *name() const;

  static const CoinPresolveAction *presolve(CoinPresolveMatrix * prob,
                                            const int *implied_free,
                                            const int * which,
                                            int numberFree,
                                            const CoinPresolveAction *next,
                                            int fill_level);
  static const CoinPresolveAction *presolveX(CoinPresolveMatrix * prob,
                                  const CoinPresolveAction *next,
                                  int fillLevel);

  void postsolve(CoinPostsolveMatrix *prob) const;

  virtual ~subst_constraint_action();
};





/*static*/ void implied_bounds(const double *els,
                           const double *clo, const double *cup,
                           const int *hcol,
                           CoinBigIndex krs, CoinBigIndex kre,
                           double *maxupp, double *maxdownp,
                           int jcol,
                           double rlo, double rup,
                           double *iclb, double *icub);
#endif