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# /home/coin/SVN-release/DyLP-1.5.0/Osi/src/OsiPresolve.hpp

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    00001 // Copyright (C) 2003, International Business Machines
    00002 // Corporation and others.  All Rights Reserved.
    00003
    00004 #ifndef OsiPresolve_H
    00005 #define OsiPresolve_H
    00006 #include "OsiSolverInterface.hpp"
    00007
    00008 class CoinPresolveAction;
    00009 #include "CoinPresolveMatrix.hpp"
    00010
    00011
    00061 class OsiPresolve {
    00062 public:
    00064   OsiPresolve();
    00065
    00067   virtual ~OsiPresolve();
    00068
    00089   virtual OsiSolverInterface *presolvedModel(OsiSolverInterface & origModel,
    00090                                              double feasibilityTolerance=0.0,
    00091                                              bool keepIntegers=true,
    00092                                              int numberPasses=5,
    00093                                              const char * prohibited=NULL,
    00094                                              bool doStatus=true,
    00095                                              const char * rowProhibited=NULL);
    00096
    00114   virtual void postsolve(bool updateStatus=true);
    00115
    00117   OsiSolverInterface * model() const;
    00118
    00120   OsiSolverInterface * originalModel() const;
    00121
    00123   void setOriginalModel(OsiSolverInterface *model);
    00124
    00126   const int * originalColumns() const;
    00127
    00129   const int * originalRows() const;
    00130
    00132   inline int getNumRows() const
    00133   { return nrows_;}
    00134
    00136   inline int getNumCols() const
    00137   { return ncols_;}
    00138
    00143   inline void setNonLinearValue(double value)
    00144   { nonLinearValue_ = value;}
    00145   inline double nonLinearValue() const
    00146     { return nonLinearValue_;}
    00156   inline void setPresolveActions(int action)
    00157   { presolveActions_  = (presolveActions_&0xffff0000)|(action&0xffff);}
    00158
    00159 private:
    00164   OsiSolverInterface * originalModel_;
    00165
    00170   OsiSolverInterface * presolvedModel_;
    00171
    00177   double nonLinearValue_;
    00178
    00180   int * originalColumn_;
    00181
    00183   int * originalRow_;
    00184
    00186   const CoinPresolveAction *paction_;
    00187
    00194   int ncols_;
    00195
    00197   int nrows_;
    00198
    00200   CoinBigIndex nelems_;
    00201
    00207   int presolveActions_;
    00209   int numberPasses_;
    00210
    00211 protected:
    00220   virtual const CoinPresolveAction *presolve(CoinPresolveMatrix *prob);
    00221
    00232   virtual void postsolve(CoinPostsolveMatrix &prob);
    00233
    00240   void gutsOfDestroy();
    00241 };
    00242 #endif