CoinPresolveSubst.hpp

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/* $Id: CoinPresolveSubst.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 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

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