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//=====================================================
// Copyright (C) 2012 Andrea Arteaga <andyspiros@gmail.com>
//=====================================================
//
// 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_TRISOLVEVECTOR
#define ACTION_TRISOLVEVECTOR
#include "LinearCongruential.hpp"
#include <vector>
#include <algorithm>
template<class Interface>
class Action_TriSolveVector {
typedef typename Interface::Scalar Scalar;
typedef std::vector<Scalar> vector_t;
private:
// Invalidate copy constructor
Action_TriSolveVector(const Action_TriSolveVector&);
public:
// Constructor
Action_TriSolveVector(int size)
: _size(size), lc(10),
A(lc.fillVector<Scalar>(size*size)), b(lc.fillVector<Scalar>(size)),
x_work(size)
{
MESSAGE("Action_TriSolveVector Constructor");
// Adding size to the diagonal of A to ensure it is invertible
for (int i = 0; i < size; ++i)
A[i+size*i] += size;
}
// Action name
static std::string name()
{
return "TriSolveVector_" + Interface::name();
}
double fpo() {
return double(_size)*double(_size) - 2*double(_size);
}
inline void initialize(){
std::copy(b.begin(), b.end(), x_work.begin());
}
inline void calculate() {
Interface::TriSolveVector('U', _size, &A[0], &x_work[0]);
}
Scalar getResidual() {
initialize();
calculate();
Interface::TriMatrixVector('U', _size, &A[0], &x_work[0]);
Interface::axpy(_size, -1., &b[0], &x_work[0]);
return Interface::norm(_size, &x_work[0]);
}
//private:
const int _size;
LinearCongruential<> lc;
vector_t A, b;
vector_t x_work;
};
#endif // ACTION_TRISOLVEVECTOR
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