/usr/include/dolfin/fem/Assembler.h is in libdolfin-dev 1.4.0+dfsg-4.
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 | // Copyright (C) 2007-2011 Anders Logg
//
// 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 Garth N. Wells 2007-2008
// Modified by Ola Skavhaug 2008
// Modified by Joachim B Haga 2012
//
// First added: 2007-01-17
// Last changed: 2013-09-19
#ifndef __ASSEMBLER_H
#define __ASSEMBLER_H
#include <vector>
#include "AssemblerBase.h"
namespace dolfin
{
// Forward declarations
class GenericTensor;
class Form;
class UFC;
template<typename T> class MeshFunction;
/// This class provides automated assembly of linear systems, or
/// more generally, assembly of a sparse tensor from a given
/// variational form.
///
/// Subdomains for cells and facets may be specified by assigning
/// subdomain indicators specified by _MeshFunction_ to the _Form_
/// being assembled:
///
/// .. code-block:: c++
///
/// form.dx = cell_domains
/// form.ds = exterior_facet_domains
/// form.dS = interior_facet_domains
class Assembler : public AssemblerBase
{
public:
/// Constructor
Assembler() {}
/// Assemble tensor from given form
///
/// *Arguments*
/// A (_GenericTensor_)
/// The tensor to assemble.
/// a (_Form_)
/// The form to assemble the tensor from.
void assemble(GenericTensor& A, const Form& a);
/// Assemble tensor from given form over cells. This function is
/// provided for users who wish to build a customized assembler.
void assemble_cells(GenericTensor& A, const Form& a, UFC& ufc,
const MeshFunction<std::size_t>* domains,
std::vector<double>* values);
/// Assemble tensor from given form over exterior facets. This
/// function is provided for users who wish to build a customized
/// assembler.
void assemble_exterior_facets(GenericTensor& A, const Form& a,
UFC& ufc,
const MeshFunction<std::size_t>* domains,
std::vector<double>* values);
/// Assemble tensor from given form over interior facets. This
/// function is provided for users who wish to build a customized
/// assembler.
void assemble_interior_facets(GenericTensor& A, const Form& a,
UFC& ufc,
const MeshFunction<std::size_t>* domains,
std::vector<double>* values);
protected:
/// Add cell tensor to global tensor. Hook to allow the SymmetricAssembler
/// to split the cell tensor into symmetric/antisymmetric parts.
void add_to_global_tensor(GenericTensor& A,
std::vector<double>& cell_tensor,
std::vector<const std::vector<dolfin::la_index>* >& dofs);
};
}
#endif
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