1//=====================================================
2// File   :  action_trisolve.hh
3// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
4//=====================================================
5//
6// This program is free software; you can redistribute it and/or
7// modify it under the terms of the GNU General Public License
8// as published by the Free Software Foundation; either version 2
9// of the License, or (at your option) any later version.
10//
11// This program is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15// You should have received a copy of the GNU General Public License
16// along with this program; if not, write to the Free Software
17// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18//
19#ifndef ACTION_TRISOLVE
20#define ACTION_TRISOLVE
21#include "utilities.h"
22#include "STL_interface.hh"
23#include <string>
24#include "init/init_function.hh"
25#include "init/init_vector.hh"
26#include "init/init_matrix.hh"
27
28using namespace std;
29
30template<class Interface>
31class Action_trisolve {
32
33public :
34
35  // Ctor
36
37  Action_trisolve( int size ):_size(size)
38  {
39    MESSAGE("Action_trisolve Ctor");
40
41    // STL vector initialization
42    init_matrix<pseudo_random>(L_stl,_size);
43    init_vector<pseudo_random>(B_stl,_size);
44    init_vector<null_function>(X_stl,_size);
45    for (int j=0; j<_size; ++j)
46    {
47      for (int i=0; i<j; ++i)
48        L_stl[j][i] = 0;
49      L_stl[j][j] += 3;
50    }
51
52    init_vector<null_function>(resu_stl,_size);
53
54    // generic matrix and vector initialization
55    Interface::matrix_from_stl(L,L_stl);
56    Interface::vector_from_stl(X,X_stl);
57    Interface::vector_from_stl(B,B_stl);
58
59    _cost = 0;
60    for (int j=0; j<_size; ++j)
61    {
62      _cost += 2*j + 1;
63    }
64  }
65
66  // invalidate copy ctor
67
68  Action_trisolve( const  Action_trisolve & )
69  {
70    INFOS("illegal call to Action_trisolve Copy Ctor");
71    exit(1);
72  }
73
74  // Dtor
75
76  ~Action_trisolve( void ){
77
78    MESSAGE("Action_trisolve Dtor");
79
80    // deallocation
81    Interface::free_matrix(L,_size);
82    Interface::free_vector(B);
83    Interface::free_vector(X);
84  }
85
86  // action name
87
88  static inline std::string name( void )
89  {
90    return "trisolve_vector_"+Interface::name();
91  }
92
93  double nb_op_base( void ){
94    return _cost;
95  }
96
97  inline void initialize( void ){
98    //Interface::copy_vector(X_ref,X,_size);
99  }
100
101  inline void calculate( void ) {
102      Interface::trisolve_lower(L,B,X,_size);
103  }
104
105  void check_result(){
106    if (_size>128) return;
107    // calculation check
108    Interface::vector_to_stl(X,resu_stl);
109
110    STL_interface<typename Interface::real_type>::trisolve_lower(L_stl,B_stl,X_stl,_size);
111
112    typename Interface::real_type error=
113      STL_interface<typename Interface::real_type>::norm_diff(X_stl,resu_stl);
114
115    if (error>1.e-4){
116      INFOS("WRONG CALCULATION...residual=" << error);
117      exit(2);
118    } //else INFOS("CALCULATION OK...residual=" << error);
119
120  }
121
122private :
123
124  typename Interface::stl_matrix L_stl;
125  typename Interface::stl_vector X_stl;
126  typename Interface::stl_vector B_stl;
127  typename Interface::stl_vector resu_stl;
128
129  typename Interface::gene_matrix L;
130  typename Interface::gene_vector X;
131  typename Interface::gene_vector B;
132
133  int _size;
134  double _cost;
135};
136
137#endif
138