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# /home/coin/SVN-release/Osi-0.98.1/CoinUtils/src/CoinDenseFactorization.hpp

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    00001 // Copyright (C) 2008, International Business Machines
    00002 // Corporation and others.  All Rights Reserved.
    00003
    00004 /*
    00005    Authors
    00006
    00007    John Forrest
    00008
    00009  */
    00010 #ifndef CoinDenseFactorization_H
    00011 #define CoinDenseFactorization_H
    00012
    00013 #include <iostream>
    00014 #include <string>
    00015 #include <cassert>
    00016 #include "CoinFinite.hpp"
    00017 #include "CoinIndexedVector.hpp"
    00018 class CoinPackedMatrix;
    00028 class CoinDenseFactorization {
    00029    friend void CoinDenseFactorizationUnitTest( const std::string & mpsDir );
    00030
    00031 public:
    00032
    00035
    00036   CoinDenseFactorization (  );
    00038   CoinDenseFactorization ( const CoinDenseFactorization &other);
    00039
    00041   ~CoinDenseFactorization (  );
    00043   CoinDenseFactorization & operator = ( const CoinDenseFactorization & other );
    00045
    00048
    00049   void getAreas ( int numberRows,
    00050                   int numberColumns,
    00051                   CoinBigIndex maximumL,
    00052                   CoinBigIndex maximumU );
    00053
    00055   void preProcess ( );
    00061   int factor ( );
    00063   void postProcess(const int * sequence, int * pivotVariable);
    00065   void makeNonSingular(int * sequence, int numberColumns);
    00067
    00070
    00071   inline int status (  ) const {
    00072     return status_;
    00073   }
    00075   inline void setStatus (  int value)
    00076   {  status_=value;  }
    00078   inline int pivots (  ) const {
    00079     return numberPivots_;
    00080   }
    00082   inline int numberRows (  ) const {
    00083     return numberRows_;
    00084   }
    00086   inline int numberColumns (  ) const {
    00087     return numberColumns_;
    00088   }
    00090   inline int numberElements (  ) const {
    00091     return numberRows_*(numberColumns_+numberPivots_);
    00092   }
    00094   inline int numberGoodColumns (  ) const {
    00095     return numberGoodU_;
    00096   }
    00098   inline void relaxAccuracyCheck(double value)
    00099   { relaxCheck_ = value;}
    00100   inline double getAccuracyCheck() const
    00101   { return relaxCheck_;}
    00103   inline int maximumPivots (  ) const {
    00104     return maximumPivots_ ;
    00105   }
    00106   void maximumPivots (  int value );
    00107
    00109   inline double pivotTolerance (  ) const {
    00110     return pivotTolerance_ ;
    00111   }
    00112   void pivotTolerance (  double value );
    00114   inline double zeroTolerance (  ) const {
    00115     return zeroTolerance_ ;
    00116   }
    00117   inline void zeroTolerance (  double value )
    00118   { zeroTolerance_ = value;}
    00120   inline double slackValue (  ) const {
    00121     return slackValue_ ;
    00122   }
    00123   void slackValue (  double value );
    00125   double maximumCoefficient() const;
    00127
    00130
    00138   int replaceColumn ( CoinIndexedVector * regionSparse,
    00139                       int pivotRow,
    00140                       double pivotCheck ,
    00141                       bool checkBeforeModifying=false);
    00143
    00153   inline int updateColumnFT ( CoinIndexedVector * regionSparse,
    00154                        CoinIndexedVector * regionSparse2)
    00155   { return updateColumn(regionSparse,regionSparse2);}
    00158   int updateColumn ( CoinIndexedVector * regionSparse,
    00159                      CoinIndexedVector * regionSparse2,
    00160                      bool noPermute=false) const;
    00165   int updateColumnTranspose ( CoinIndexedVector * regionSparse,
    00166                               CoinIndexedVector * regionSparse2) const;
    00168
    00169
    00173
    00174   inline void clearArrays()
    00175   { gutsOfDestructor();}
    00177   inline double * elements() const
    00178   { return elements_;}
    00180   inline int * indices() const
    00181   { return (int *) (elements_+numberRows_*numberRows_);}
    00183   inline CoinBigIndex * starts() const
    00184   { return (CoinBigIndex *) pivotRow_;}
    00186   inline int * pivotRow() const
    00187   { return pivotRow_;}
    00189   inline int * permute() const
    00190   { return pivotRow_;}
    00192   inline int * permuteBack() const
    00193   { return pivotRow_+numberRows_;}
    00195   inline double * workArea() const
    00196   { return workArea_;}
    00198   inline int * intWorkArea() const
    00199   { return (int *) workArea_;}
    00201
    00203   void gutsOfDestructor();
    00205   void gutsOfInitialize();
    00207   void gutsOfCopy(const CoinDenseFactorization &other);
    00208
    00210 protected:
    00213   int checkPivot(double saveFromU, double oldPivot) const;
    00215 protected:
    00216
    00219
    00220   double pivotTolerance_;
    00222   double zeroTolerance_;
    00224   double slackValue_;
    00226   double relaxCheck_;
    00228   int numberRows_;
    00230   int numberColumns_;
    00232   int maximumRows_;
    00234   CoinBigIndex maximumSpace_;
    00236   int numberGoodU_;
    00238   int maximumPivots_;
    00240   int numberPivots_;
    00242   CoinBigIndex factorElements_;
    00244   int * pivotRow_;
    00246   int status_;
    00251   double * elements_;
    00253   double * workArea_;
    00255 };
    00256 #endif