OsiSimplexInterface.hpp

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

#include <string>
#include <vector>

#include "CoinMessageHandler.hpp"
#include "CoinPackedVectorBase.hpp"

#include "OsiSolverParameters.hpp"

class CoinPackedMatrix;
class CoinWarmStart;

//#############################################################################

class OsiSimplexInterface  {
   friend void OsiSimplexInterfaceCommonUnitTest(
      const OsiSolverInterface* emptySi,
      const std::string & mpsDir);

public:


  virtual void enableSimplexInterface(bool doingPrimal) {};

  virtual void disableSimplexInterface() {};

  virtual bool basisIsAvailable() = 0;

  virtual void getBasisStatus(int* cstat, int* rstat) = 0;

  virtual int setBasisStatus(const int* cstat, const int* rstat) = 0;

  virtual int pivot(int colIn, int colOut, int outStatus) = 0;

  virtual int primalPivotResult(int colIn, int sign, 
                                int& colOut, int& outStatus, 
                                double& t, CoinPackedVector* dx) = 0;

  virtual int dualPivotResult(int& colIn, int& sign, 
                              int colOut, int outStatus, 
                              double& t, CoinPackedVector* dx) = 0;

  virtual void getReducedGradient(double* columnReducedCosts, 
                                  double * duals,
                                  const double * c) = 0;

  virtual void setObjectiveAndRefresh(double* c) = 0;

  virtual void getBInvARow(int row, double* z) = 0;

  virtual void getBInvRow(int row, double* z) = 0;

  virtual void getBInvACol(int col, double* vec) = 0;

  virtual void getBInvCol(int col, double* vec) = 0;

  virtual void getBasics(int* index) = 0;




    OsiSimplexInterface(); 
    
    OsiSimplexInterface(const OsiSimplexInterface & rhs);
  
    OsiSimplexInterface & operator=(const OsiSimplexInterface& rhs);
  
    virtual ~OsiSimplexInterface();

  //---------------------------------------------------------------------------

private:


};

//#############################################################################
void
OsiSimplexInterfaceCommonUnitTest(
   const OsiSolverInterface* emptySi,
   const std::string & mpsDir);

#endif

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