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//=====================================================
// File : STL_interface.hh
// Author : L. Plagne <laurent.plagne@edf.fr)>
// Copyright (C) EDF R&D, lun sep 30 14:23:24 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 STL_INTERFACE_HH
#define STL_INTERFACE_HH
#include <string>
#include <vector>
#include "utilities.h"
using namespace std;
template<class real>
class STL_interface{
public :
typedef real real_type ;
typedef std::vector<real> stl_vector;
typedef std::vector<stl_vector > stl_matrix;
typedef stl_matrix gene_matrix;
typedef stl_vector gene_vector;
static inline std::string name( void )
{
return "STL";
}
static void free_matrix(gene_matrix & /*A*/, int /*N*/){}
static void free_vector(gene_vector & /*B*/){}
static inline void matrix_from_stl(gene_matrix & A, stl_matrix & A_stl){
A = A_stl;
}
static inline void vector_from_stl(gene_vector & B, stl_vector & B_stl){
B = B_stl;
}
static inline void vector_to_stl(gene_vector & B, stl_vector & B_stl){
B_stl = B ;
}
static inline void matrix_to_stl(gene_matrix & A, stl_matrix & A_stl){
A_stl = A ;
}
static inline void copy_vector(const gene_vector & source, gene_vector & cible, int N){
for (int i=0;i<N;i++){
cible[i]=source[i];
}
}
static inline void copy_matrix(const gene_matrix & source, gene_matrix & cible, int N){
for (int i=0;i<N;i++)
for (int j=0;j<N;j++)
cible[i][j]=source[i][j];
}
// static inline void ata_product(const gene_matrix & A, gene_matrix & X, int N)
// {
// real somme;
// for (int j=0;j<N;j++){
// for (int i=0;i<N;i++){
// somme=0.0;
// for (int k=0;k<N;k++)
// somme += A[i][k]*A[j][k];
// X[j][i]=somme;
// }
// }
// }
static inline void aat_product(const gene_matrix & A, gene_matrix & X, int N)
{
real somme;
for (int j=0;j<N;j++){
for (int i=0;i<N;i++){
somme=0.0;
if(i>=j)
{
for (int k=0;k<N;k++){
somme+=A[k][i]*A[k][j];
}
X[j][i]=somme;
}
}
}
}
static inline void matrix_matrix_product(const gene_matrix & A, const gene_matrix & B, gene_matrix & X, int N)
{
real somme;
for (int j=0;j<N;j++){
for (int i=0;i<N;i++){
somme=0.0;
for (int k=0;k<N;k++)
somme+=A[k][i]*B[j][k];
X[j][i]=somme;
}
}
}
static inline void matrix_vector_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N)
{
real somme;
for (int i=0;i<N;i++){
somme=0.0;
for (int j=0;j<N;j++)
somme+=A[j][i]*B[j];
X[i]=somme;
}
}
static inline void symv(gene_matrix & A, gene_vector & B, gene_vector & X, int N)
{
for (int j=0; j<N; ++j)
X[j] = 0;
for (int j=0; j<N; ++j)
{
real t1 = B[j];
real t2 = 0;
X[j] += t1 * A[j][j];
for (int i=j+1; i<N; ++i) {
X[i] += t1 * A[j][i];
t2 += A[j][i] * B[i];
}
X[j] += t2;
}
}
static inline void syr2(gene_matrix & A, gene_vector & B, gene_vector & X, int N)
{
for (int j=0; j<N; ++j)
{
for (int i=j; i<N; ++i)
A[j][i] += B[i]*X[j] + B[j]*X[i];
}
}
static inline void ger(gene_matrix & A, gene_vector & X, gene_vector & Y, int N)
{
for (int j=0; j<N; ++j)
{
for (int i=j; i<N; ++i)
A[j][i] += X[i]*Y[j];
}
}
static inline void atv_product(gene_matrix & A, gene_vector & B, gene_vector & X, int N)
{
real somme;
for (int i=0;i<N;i++){
somme = 0.0;
for (int j=0;j<N;j++)
somme += A[i][j]*B[j];
X[i] = somme;
}
}
static inline void axpy(real coef, const gene_vector & X, gene_vector & Y, int N){
for (int i=0;i<N;i++)
Y[i]+=coef*X[i];
}
static inline void axpby(real a, const gene_vector & X, real b, gene_vector & Y, int N){
for (int i=0;i<N;i++)
Y[i] = a*X[i] + b*Y[i];
}
static inline void trisolve_lower(const gene_matrix & L, const gene_vector & B, gene_vector & X, int N){
copy_vector(B,X,N);
for(int i=0; i<N; ++i)
{
X[i] /= L[i][i];
real tmp = X[i];
for (int j=i+1; j<N; ++j)
X[j] -= tmp * L[i][j];
}
}
static inline real norm_diff(const stl_vector & A, const stl_vector & B)
{
int N=A.size();
real somme=0.0;
real somme2=0.0;
for (int i=0;i<N;i++){
real diff=A[i]-B[i];
somme+=diff*diff;
somme2+=A[i]*A[i];
}
return somme/somme2;
}
static inline real norm_diff(const stl_matrix & A, const stl_matrix & B)
{
int N=A[0].size();
real somme=0.0;
real somme2=0.0;
for (int i=0;i<N;i++){
for (int j=0;j<N;j++){
real diff=A[i][j] - B[i][j];
somme += diff*diff;
somme2 += A[i][j]*A[i][j];
}
}
return somme/somme2;
}
static inline void display_vector(const stl_vector & A)
{
int N=A.size();
for (int i=0;i<N;i++){
INFOS("A["<<i<<"]="<<A[i]<<endl);
}
}
};
#endif
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