1 //=====================================================
2 // File : init_matrix.hh
3 // Author : L. Plagne <laurent.plagne@edf.fr)>
4 // Copyright (C) EDF R&D, lun sep 30 14:23:19 CEST 2002
5 //=====================================================
6 //
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License
9 // as published by the Free Software Foundation; either version 2
10 // of the License, or (at your option) any later version.
11 //
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 //
20 #ifndef INIT_MATRIX_HH
21 #define INIT_MATRIX_HH
22
23 // The Vector class must satisfy the following part of STL vector concept :
24 // resize() method
25 // [] operator for setting element
26 // value_type defined
27 template<double init_function(int,int), class Vector>
init_row(Vector & X,int size,int row)28 BTL_DONT_INLINE void init_row(Vector & X, int size, int row){
29
30 X.resize(size);
31
32 for (unsigned int j=0;j<X.size();j++){
33 X[j]=typename Vector::value_type(init_function(row,j));
34 }
35 }
36
37
38 // Matrix is a Vector of Vector
39 // The Matrix class must satisfy the following part of STL vector concept :
40 // resize() method
41 // [] operator for setting rows
42 template<double init_function(int,int),class Vector>
init_matrix(Vector & A,int size)43 BTL_DONT_INLINE void init_matrix(Vector & A, int size){
44 A.resize(size);
45 for (unsigned int row=0; row<A.size() ; row++){
46 init_row<init_function>(A[row],size,row);
47 }
48 }
49
50 template<double init_function(int,int),class Matrix>
init_matrix_symm(Matrix & A,int size)51 BTL_DONT_INLINE void init_matrix_symm(Matrix& A, int size){
52 A.resize(size);
53 for (unsigned int row=0; row<A.size() ; row++)
54 A[row].resize(size);
55 for (unsigned int row=0; row<A.size() ; row++){
56 A[row][row] = init_function(row,row);
57 for (unsigned int col=0; col<row ; col++){
58 double x = init_function(row,col);
59 A[row][col] = A[col][row] = x;
60 }
61 }
62 }
63
64 #endif
65