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# /home/coin/SVN-release/Bcps-0.91.0/Cgl/src/CglLandP/CglLandPUtils.hpp

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    00001 // Copyright (C) 2005-2008, Pierre Bonami and others.  All Rights Reserved.
    00002 // Author:   Pierre Bonami
    00003 //           LIF
    00004 //           CNRS, Aix-Marseille Universites
    00005 // Date:     02/23/08
    00006 //---------------------------------------------------------------------------
    00007
    00008
    00009 #ifndef CglLandPUtils_H
    00010 #define CglLandPUtils_H
    00011 #include "CglLandPTabRow.hpp"
    00012
    00013 class OsiRowCut;
    00014 class OsiCuts;
    00015 #include <vector>
    00016
    00017 namespace LAP {
    00019 double normCoef(TabRow &row, int ncols, const int * nonBasics);
    00021 void scale(OsiRowCut &cut);
    00023 void scale(OsiRowCut &cut, double norma);
    00025 void modularizeRow(TabRow & row, const bool * integerVar);
    00026
    00027
    00029 inline double intersectionCutCoef(double alpha_i, double beta)
    00030 {
    00031     if (alpha_i>0) return alpha_i* (1 - beta);
    00032     else return -alpha_i * beta;// (1 - beta);
    00033 }
    00034
    00036 inline double modularizedCoef(double alpha, double beta)
    00037 {
    00038     double f_i = alpha - floor(alpha);
    00039     if (f_i <= beta)
    00040         return f_i;
    00041     else
    00042         return f_i - 1;
    00043 }
    00044
    00046 inline bool int_val(double value, double tol)
    00047 {
    00048     return fabs( floor( value + 0.5 ) - value ) < tol;
    00049 }
    00050
    00051
    00053 struct Cuts {
    00054     Cuts():  numberCuts_(0), cuts_(0){
    00055     }
    00057     int insertAll(OsiCuts & cs, CoinRelFltEq eq);
    00059     ~Cuts() {}
    00061     OsiRowCut * rowCut(unsigned int i) {
    00062         return cuts_[i];
    00063     }
    00065     const OsiRowCut * rowCut(unsigned int i) const {
    00066         return cuts_[i];
    00067     }
    00069     void insert(int i, OsiRowCut * cut);
    00071     int numberCuts() {
    00072         return numberCuts_;
    00073     }
    00075     void resize(unsigned int i) {
    00076         cuts_.resize(i, (OsiRowCut *) NULL);
    00077     }
    00078 private:
    00080     int numberCuts_;
    00082     std::vector<OsiRowCut *> cuts_;
    00083 };
    00084
    00085 }
    00086 #endif
    00087