/usr/include/libmesh/sparse_shell_matrix.h is in libmesh-dev 0.7.1-2ubuntu1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | // $Id: sparse_shell_matrix.h 3874 2010-07-02 21:57:26Z roystgnr $
// The libMesh Finite Element Library.
// Copyright (C) 2002-2008 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
// This library 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef __sparse_shell_matrix_h__
#define __sparse_shell_matrix_h__
// Local includes
#include "libmesh_common.h"
#include "reference_counted_object.h"
#include "libmesh.h"
#include "shell_matrix.h"
#include "sparse_matrix.h"
namespace libMesh
{
/**
* This class allows to use any SparseMatrix object as a shell matrix.
*
* @author Tim Kroeger, 2008
*/
template <typename T>
class SparseShellMatrix : public ShellMatrix<T>
{
public:
/**
* Constructor; takes references to the sparse matrix. The sparse
* matrix itself has to be stored elsewhere.
*/
SparseShellMatrix (const SparseMatrix<T>& m);
/**
* Destructor.
*/
virtual ~SparseShellMatrix ();
/**
* @returns \p m, the row-dimension of the matrix where the marix is
* \f$ M \times N \f$.
*/
virtual unsigned int m () const;
/**
* @returns \p n, the column-dimension of the matrix where the marix
* is \f$ M \times N \f$.
*/
virtual unsigned int n () const;
/**
* Multiplies the matrix with \p arg and stores the result in \p
* dest.
*/
virtual void vector_mult (NumericVector<T>& dest,
const NumericVector<T>& arg) const;
/**
* Multiplies the matrix with \p arg and adds the result to \p dest.
*/
virtual void vector_mult_add (NumericVector<T>& dest,
const NumericVector<T>& arg) const;
/**
* Copies the diagonal part of the matrix into \p dest.
*/
virtual void get_diagonal (NumericVector<T>& dest) const;
protected:
/**
* The sparse matrix.
*/
const SparseMatrix<T>& _m;
};
//-----------------------------------------------------------------------
// SparseShellMatrix inline members
template <typename T>
inline
SparseShellMatrix<T>::SparseShellMatrix (const SparseMatrix<T>& m):
ShellMatrix<T>(),
_m(m)
{}
template <typename T>
inline
SparseShellMatrix<T>::~SparseShellMatrix ()
{}
template <typename T>
inline
unsigned int SparseShellMatrix<T>::m () const
{
return _m.m();
}
template <typename T>
inline
unsigned int SparseShellMatrix<T>::n () const
{
return _m.n();
}
template <typename T>
inline
void SparseShellMatrix<T>::get_diagonal(NumericVector<T>& dest) const
{
_m.get_diagonal(dest);
}
} // namespace libMesh
#endif // #ifndef __sparse_shell_matrix_h__
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