1//=====================================================
2// File   :  blitz_interface.hh
3// Author :  L. Plagne <laurent.plagne@edf.fr)>
4// Copyright (C) EDF R&D,  lun sep 30 14:23:30 CEST 2002
5// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
6//=====================================================
7//
8// This program is free software; you can redistribute it and/or
9// modify it under the terms of the GNU General Public License
10// as published by the Free Software Foundation; either version 2
11// of the License, or (at your option) any later version.
12//
13// This program is distributed in the hope that it will be useful,
14// but WITHOUT ANY WARRANTY; without even the implied warranty of
15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16// GNU General Public License for more details.
17// You should have received a copy of the GNU General Public License
18// along with this program; if not, write to the Free Software
19// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
20//
21#ifndef BLITZ_INTERFACE_HH
22#define BLITZ_INTERFACE_HH
23
24#include <blitz/blitz.h>
25#include <blitz/array.h>
26#include <blitz/vector-et.h>
27#include <blitz/vecwhere.h>
28#include <blitz/matrix.h>
29#include <vector>
30
31BZ_USING_NAMESPACE(blitz)
32
33template<class real>
34class blitz_interface{
35
36public :
37
38  typedef real real_type ;
39
40  typedef std::vector<real>  stl_vector;
41  typedef std::vector<stl_vector > stl_matrix;
42
43  typedef blitz::Array<real, 2>  gene_matrix;
44  typedef blitz::Array<real, 1>  gene_vector;
45//   typedef blitz::Matrix<real, blitz::ColumnMajor>  gene_matrix;
46//   typedef blitz::Vector<real> gene_vector;
47
48  static inline std::string name() { return "blitz"; }
49
50  static void free_matrix(gene_matrix & A, int N){}
51
52  static void free_vector(gene_vector & B){}
53
54  static inline void matrix_from_stl(gene_matrix & A, stl_matrix & A_stl){
55    A.resize(A_stl[0].size(),A_stl.size());
56    for (int j=0; j<A_stl.size() ; j++){
57      for (int i=0; i<A_stl[j].size() ; i++){
58        A(i,j)=A_stl[j][i];
59      }
60    }
61  }
62
63  static inline void vector_from_stl(gene_vector & B, stl_vector & B_stl){
64    B.resize(B_stl.size());
65    for (int i=0; i<B_stl.size() ; i++){
66      B(i)=B_stl[i];
67    }
68  }
69
70  static inline void vector_to_stl(gene_vector & B, stl_vector & B_stl){
71    for (int i=0; i<B_stl.size() ; i++){
72      B_stl[i]=B(i);
73    }
74  }
75
76  static inline void matrix_to_stl(gene_matrix & A, stl_matrix & A_stl){
77    int N=A_stl.size();
78    for (int j=0;j<N;j++){
79      A_stl[j].resize(N);
80      for (int i=0;i<N;i++)
81        A_stl[j][i] = A(i,j);
82    }
83  }
84
85  static inline void matrix_matrix_product(const gene_matrix & A, const gene_matrix & B, gene_matrix & X, int N)
86  {
87    firstIndex i;
88    secondIndex j;
89    thirdIndex k;
90    X = sum(A(i,k) * B(k,j), k);
91  }
92
93  static inline void ata_product(const gene_matrix & A, gene_matrix & X, int N)
94  {
95    firstIndex i;
96    secondIndex j;
97    thirdIndex k;
98    X = sum(A(k,i) * A(k,j), k);
99  }
100
101  static inline void aat_product(const gene_matrix & A, gene_matrix & X, int N)
102  {
103    firstIndex i;
104    secondIndex j;
105    thirdIndex k;
106    X = sum(A(i,k) * A(j,k), k);
107  }
108
109  static inline void matrix_vector_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N)
110  {
111    firstIndex i;
112    secondIndex j;
113    X = sum(A(i,j)*B(j),j);
114  }
115
116  static inline void atv_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N)
117  {
118    firstIndex i;
119    secondIndex j;
120    X = sum(A(j,i) * B(j),j);
121  }
122
123  static inline void axpy(const real coef, const gene_vector & X, gene_vector & Y, int N)
124  {
125    firstIndex i;
126    Y = Y(i) + coef * X(i);
127    //Y += coef * X;
128  }
129
130  static inline void copy_matrix(const gene_matrix & source, gene_matrix & cible, int N){
131    cible = source;
132    //cible.template operator=<gene_matrix>(source);
133//     for (int i=0;i<N;i++){
134//       for (int j=0;j<N;j++){
135//         cible(i,j)=source(i,j);
136//       }
137//     }
138  }
139
140  static inline void copy_vector(const gene_vector & source, gene_vector & cible, int N){
141    //cible.template operator=<gene_vector>(source);
142    cible = source;
143  }
144
145};
146
147#endif
148