text: //=====================================================
  // File   :  action_matrix_matrix_product.hh
  // Author :  L. Plagne <laurent.plagne@edf.fr)>
  // Copyright (C) EDF R&D,  lun sep 30 14:23:19 CEST 2002
  //=====================================================
  //
  // This program is free software; you can redistribute it and/or
  // modify it under the terms of the GNU General Public License
  // as published by the Free Software Foundation; either version 2
  // of the License, or (at your option) any later version.
  //
  // This program is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU General Public License for more details.
  // You should have received a copy of the GNU General Public License
  // along with this program; if not, write to the Free Software
  // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  //
  #ifndef ACTION_TRISOLVE_MATRIX_PRODUCT
  #define ACTION_TRISOLVE_MATRIX_PRODUCT
  #include "utilities.h"
  #include "STL_interface.hh"
  
  #include "init/init_function.hh"
  #include "init/init_vector.hh"
  #include "init/init_matrix.hh"
  
  using namespace std;
  
  template<class Interface>
  class Action_trisolve_matrix {
  
  public :
  
    // Ctor
  
    Action_trisolve_matrix( int size ):_size(size)
    {
      MESSAGE("Action_trisolve_matrix Ctor");
  
      // STL matrix and vector initialization
  
      init_matrix<pseudo_random>(A_stl,_size);
      init_matrix<pseudo_random>(B_stl,_size);
      init_matrix<null_function>(X_stl,_size);
      init_matrix<null_function>(resu_stl,_size);
  
      for (int j=0; j<_size; ++j)
      {
        for (int i=0; i<j; ++i)
          A_stl[j][i] = 0;
        A_stl[j][j] += 3;
      }
  
      // generic matrix and vector initialization
  
      Interface::matrix_from_stl(A_ref,A_stl);
      Interface::matrix_from_stl(B_ref,B_stl);
      Interface::matrix_from_stl(X_ref,X_stl);
  
      Interface::matrix_from_stl(A,A_stl);
      Interface::matrix_from_stl(B,B_stl);
      Interface::matrix_from_stl(X,X_stl);
  
      _cost = 0;
      for (int j=0; j<_size; ++j)
      {
        _cost += 2*j + 1;
      }
      _cost *= _size;
    }
  
    // invalidate copy ctor
  
    Action_trisolve_matrix( const  Action_trisolve_matrix & )
    {
      INFOS("illegal call to Action_trisolve_matrix Copy Ctor");
      exit(0);
    }
  
    // Dtor
  
    ~Action_trisolve_matrix( void ){
  
      MESSAGE("Action_trisolve_matrix Dtor");
  
      // deallocation
  
      Interface::free_matrix(A,_size);
      Interface::free_matrix(B,_size);
      Interface::free_matrix(X,_size);
  
      Interface::free_matrix(A_ref,_size);
      Interface::free_matrix(B_ref,_size);
      Interface::free_matrix(X_ref,_size);
  
    }
  
    // action name
  
    static inline std::string name( void )
    {
      return "trisolve_matrix_"+Interface::name();
    }
  
    double nb_op_base( void ){
      return _cost;
    }
  
    inline void initialize( void ){
  
      Interface::copy_matrix(A_ref,A,_size);
      Interface::copy_matrix(B_ref,B,_size);
      Interface::copy_matrix(X_ref,X,_size);
  
    }
  
    inline void calculate( void ) {
        Interface::trisolve_lower_matrix(A,B,X,_size);
    }
  
    void check_result( void ){
  
      // calculation check
  
  //     Interface::matrix_to_stl(X,resu_stl);
  //
  //     STL_interface<typename Interface::real_type>::matrix_matrix_product(A_stl,B_stl,X_stl,_size);
  //
  //     typename Interface::real_type error=
  //       STL_interface<typename Interface::real_type>::norm_diff(X_stl,resu_stl);
  //
  //     if (error>1.e-6){
  //       INFOS("WRONG CALCULATION...residual=" << error);
  // //       exit(1);
  //     }
  
    }
  
  private :
  
    typename Interface::stl_matrix A_stl;
    typename Interface::stl_matrix B_stl;
    typename Interface::stl_matrix X_stl;
    typename Interface::stl_matrix resu_stl;
  
    typename Interface::gene_matrix A_ref;
    typename Interface::gene_matrix B_ref;
    typename Interface::gene_matrix X_ref;
  
    typename Interface::gene_matrix A;
    typename Interface::gene_matrix B;
    typename Interface::gene_matrix X;
  
    int _size;
    double _cost;
  
  };
  
  
  #endif
  
  
  
  