ClpDualRowSteepest.hpp

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/* $Id$ */
// 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 ClpDualRowSteepest_H
#define ClpDualRowSteepest_H
 
#include "ClpDualRowPivot.hpp"
class CoinIndexedVector;
 
//#############################################################################
 
class ClpDualRowSteepest : public ClpDualRowPivot {
 
public:
 
 
  virtual int pivotRow();
 
  virtual double updateWeights(CoinIndexedVector *input,
    CoinIndexedVector *spare,
    CoinIndexedVector *spare2,
    CoinIndexedVector *updatedColumn);
 
  virtual void updatePrimalSolution(CoinIndexedVector *input,
    double theta,
    double &changeInObjective);
 
  virtual void saveWeights(ClpSimplex *model, int mode);
  void passInSavedWeights(const CoinIndexedVector *saved);
  inline CoinIndexedVector *savedWeights()
  {
    return savedWeights_;
  }
  virtual void unrollWeights();
  virtual void clearArrays();
  virtual bool looksOptimal() const;
  virtual void maximumPivotsChanged();
 
  enum Persistence {
    normal = 0x00, // create (if necessary) and destroy
    keep = 0x01 // create (if necessary) and leave
  };
 
 
 
  ClpDualRowSteepest(int mode = 3);
 
  ClpDualRowSteepest(const ClpDualRowSteepest &);
 
  ClpDualRowSteepest &operator=(const ClpDualRowSteepest &rhs);
 
  void fill(const ClpDualRowSteepest &rhs);
 
  virtual ~ClpDualRowSteepest();
 
  virtual ClpDualRowPivot *clone(bool copyData = true) const;
 
 
  inline int mode() const
  {
    return mode_;
  }
  inline void setMode(int mode)
  {
    mode_ = mode;
  }
  inline void setPersistence(Persistence life)
  {
    persistence_ = life;
  }
  inline Persistence persistence() const
  {
    return persistence_;
  }
 
  //---------------------------------------------------------------------------
 
protected:
 
  int state_;
  int mode_;
  Persistence persistence_;
  double *weights_;
  CoinIndexedVector *infeasible_;
  CoinIndexedVector *alternateWeights_;
  CoinIndexedVector *savedWeights_;
  int *dubiousWeights_;
};
 
#endif
 
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