/usr/include/dolfin/la/UmfpackLUSolver.h is in libdolfin1.0-dev 1.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | // Copyright (C) 2006-2010 Garth N. Wells
//
// This file is part of DOLFIN.
//
// DOLFIN 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 3 of the License, or
// (at your option) any later version.
//
// DOLFIN 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 DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// Modified by Anders Logg 2006.
// Modified by Dag Lindbo 2008.
//
// First added: 2006-05-31
// Last changed: 2011-03-24
#ifndef __UMFPACK_LU_SOLVER_H
#define __UMFPACK_LU_SOLVER_H
#include <boost/scoped_ptr.hpp>
#include <boost/shared_ptr.hpp>
#include "ublas.h"
#include "GenericLUSolver.h"
namespace dolfin
{
/// Forward declarations
class GenericVector;
class GenericMatrix;
class uBLASVector;
class uBLASKrylovMatrix;
template<typename Mat> class uBLASMatrix;
/// This class implements the direct solution (LU factorization) of
/// linear systems of the form Ax = b using UMFPACK
/// (http://www.cise.ufl.edu/research/sparse/umfpack/) if installed.
class UmfpackLUSolver : public GenericLUSolver
{
public:
/// Constructor
UmfpackLUSolver();
/// Constructor
UmfpackLUSolver(boost::shared_ptr<const GenericMatrix> A);
/// Destructor
~UmfpackLUSolver();
/// Set operator (matrix)
void set_operator(const boost::shared_ptr<const GenericMatrix> A);
/// Return the operator (matrix)
const GenericMatrix& get_operator() const;
/// Solve linear system Ax = b for a sparse matrix using UMFPACK if installed
uint solve(GenericVector& x, const GenericVector& b);
/// Solve linear system
uint solve(const GenericMatrix& A, GenericVector& x, const GenericVector& b);
/// Default parameter values
static Parameters default_parameters();
private:
// Perform symbolic factorisation
void symbolic_factorize();
/// LU factorisation
void numeric_factorize();
/// Solve factorized system (UMFPACK).
uint solve_factorized(GenericVector& x, const GenericVector& b) const;
// Return pointer to symbolic factorisation
static boost::shared_ptr<void> umfpack_factorize_symbolic(uint M, uint N,
const std::size_t* Ap,
const std::size_t* Ai,
const double* Ax);
// Return pointer to the numerical factorisation
static boost::shared_ptr<void> umfpack_factorize_numeric(const std::size_t* Ap,
const std::size_t* Ai,
const double* Ax, void* symbolic);
static void umfpack_solve(const std::size_t* Ap, const std::size_t* Ai,
const double* Ax, double* x, const double* b,
void* numeric);
/// Check status flag returned by an UMFPACK function
static void umfpack_check_status(long int status, std::string function);
// UMFPACK data (note that boost::scoped_ptr cannot hold a void pointer)
boost::shared_ptr<void> symbolic;
boost::shared_ptr<void> numeric;
// Operator (the matrix)
boost::shared_ptr<const GenericMatrix> A;
};
}
#endif
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