/usr/include/trilinos/Galeri_Laplace1DNeumann.h is in libtrilinos-dev 10.4.0.dfsg-1ubuntu2.
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 | // @HEADER
// ************************************************************************
//
// Galeri: Finite Element and Matrix Generation Package
// Copyright (2006) ETHZ/Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// 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
//
// Questions about Galeri? Contact Marzio Sala (marzio.sala _AT_ gmail.com)
//
// ************************************************************************
// @HEADER
#ifndef GALERI_LAPLACE1DNEUMANNMATRIX_H
#define GALERI_LAPLACE1DNEUMANNMATRIX_H
#include "Galeri_Exception.h"
#include "Epetra_Comm.h"
#include "Epetra_BlockMap.h"
#include "Epetra_CrsMatrix.h"
namespace Galeri {
namespace Matrices {
inline
Epetra_CrsMatrix* Laplace1DNeumann(const Epetra_Map* Map)
{
int NumMyElements = Map->NumMyElements();
int NumGlobalElements = Map->NumGlobalElements();
int* MyGlobalElements = Map->MyGlobalElements();
Epetra_CrsMatrix* Matrix = new Epetra_CrsMatrix(Copy, *Map, 3);
vector<double> Values(2);
vector<int> Indices(2);
int NumEntries;
for (int i = 0 ; i < NumMyElements ; ++i)
{
if (MyGlobalElements[i] == 0)
{
Indices[0] = 1;
NumEntries = 1;
Values[0] = -1.0;
}
else if (MyGlobalElements[i] == NumGlobalElements - 1)
{
Indices[0] = NumGlobalElements - 2;
NumEntries = 1;
Values[0] = -1.0;
} else {
Indices[0] = MyGlobalElements[i] - 1;
Values[1] = -1.0;
Indices[1] = MyGlobalElements[i] + 1;
Values[0] = -1.0;
NumEntries = 2;
}
Matrix->InsertGlobalValues(MyGlobalElements[i], NumEntries,
&Values[0], &Indices[0]);
// Put in the diagonal entry
if (MyGlobalElements[i] == 0 ||
(MyGlobalElements[i] == NumGlobalElements - 1))
Values[0] = 1.0;
else
Values[0] = 2.0;
Matrix->InsertGlobalValues(MyGlobalElements[i], 1,
&Values[0], MyGlobalElements + i);
}
// Finish up, trasforming the matrix entries into local numbering,
// to optimize data transfert during matrix-vector products
Matrix->FillComplete();
Matrix->OptimizeStorage();
return(Matrix);
}
} // namespace Matrices
} // namespace Galeri
#endif
|