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/* Copyright (c) FFLAS-FFPACK
* ========LICENCE========
* This file is part of the library FFLAS-FFPACK.
*
* FFLAS-FFPACK is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*/
#include <iostream>
#include "fflas-ffpack/fflas-ffpack.h"
/**
* This example solve the quare system defined by the input
* over a defined finite field.
*
*/
int main(int argc, char** argv)
{
if (argc != 4) {
std::cerr << "Usage: solve <p> <matrixA> <matrixB>" << std::endl;
return -1;
}
int p = atoi(argv[1]);
std::string fileA = argv[2];
std::string fileB = argv[3];
// Creating the finite field Z/pZ (assuming p>2, use Modular<float> for p=2)
Givaro::ModularBalanced<double> F(p);
// Reading the matrices
double* A, *B, *X;
size_t mA, nA, mB, nB;
int info = 0;
FFLAS::ReadMatrix(fileA.c_str(), F, mA, nA, A);
FFLAS::ReadMatrix(fileB.c_str(), F, mB, nB, B);
X = FFLAS::fflas_new(F, nA, nB);
if (mA != nA || mA != mB) {
std::cerr << "At least one input matrix has not the right dimension";
std::cerr << std::endl;
return -1;
}
size_t rank = FFPACK::fgesv(F, FFLAS::FflasLeft, mA, nA, nB, A, nA, X, nB,
B, nB, &info);
if (info){
std::cout << "System is inconsistent" << std::endl;
return -1;
}
std::cout << "rank: " << rank << std::endl;
FFLAS::WriteMatrix(std::cout << "debug B" << std::endl, F, mB, nB, B, nB) << std::endl;
FFLAS::WriteMatrix(std::cout << "solution" << std::endl, F, nA, nB, X, nB) << std::endl;
FFLAS::fflas_delete(A);
FFLAS::fflas_delete(B);
FFLAS::fflas_delete(X);
return 0;
}
/* -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
// vim:sts=4:sw=4:ts=4:et:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
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