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// Copyright (C) 2003, International Business Machines
// Corporation and others.  All Rights Reserved.

/* 
   Authors
   
   John Forrest

 */
#ifndef ClpPredictorCorrector_H
#define ClpPredictorCorrector_H

#include "ClpInterior.hpp"

class ClpPredictorCorrector : public ClpInterior {

public:

  int solve();


  //phase  - 0 predictor
  //         1 corrector
  //         2 primal dual
  double findStepLength( int phase);
  double findDirectionVector(const int phase);
  int createSolution();
  //phase 0=as is , 1 = after predictor , 2 after corrector
  double complementarityGap(int & numberComplementarityPairs,int & numberComplementarityItems,
                            const int phase);
  //phase 0=affine , 1 = corrector , 2 = primal-dual
  void setupForSolve(const int phase);
  void solveSystem(double * region1, double * region2,
                   const double * region1In, const double * region2In,
                   const double * saveRegion1, const double * saveRegion2,
                   bool gentleRefine);
  bool checkGoodMove(const bool doCorrector,double & bestNextGap,
                     bool allowIncreasingGap);
  bool checkGoodMove2(double move,double & bestNextGap,
                      bool allowIncreasingGap);
  //returns number fixed
  int updateSolution(double nextGap);
  double affineProduct();
  void debugMove(int phase,double primalStep, double dualStep);

};
#endif

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