/usr/include/dolfin/function/SpecialFacetFunction.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.
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//
// 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/>.
//
// First added: 2010-10-13
// Last changed: 2011-07-04
#ifndef __SPECIAL_FACET_FUNCTION_H
#define __SPECIAL_FACET_FUNCTION_H
#include <vector>
#include <dolfin/function/Expression.h>
namespace ufc
{
class cell;
}
namespace dolfin
{
/// A _SpecialFacetFunction_ is a representation of a global
/// function that is in P(f) for each _Facet_ f in a _Mesh_
/// for some _FunctionSpace_ P
template <typename T> class Array;
class Function;
class SpecialFacetFunction : public Expression
{
public:
/// Create (scalar-valued) SpecialFacetFunction
///
/// *Arguments*
/// f_e (std::vector<_Function_>)
/// Separate _Function_s for each facet
explicit SpecialFacetFunction(std::vector<Function>& f_e);
/// Create (vector-valued) SpecialFacetFunction
///
/// *Arguments*
/// f_e (std::vector<_Function_>)
/// Separate _Function_s for each facet
///
/// dim (int)
/// The value-dimension of the Functions
SpecialFacetFunction(std::vector<Function>& f_e, std::size_t dim);
/// Evaluate SpecialFacetFunction (cf _Expression_.eval)
/// Evaluate function for given cell
void eval(Array<double>& values, const Array<double>& x,
const ufc::cell& cell) const;
/// Extract sub-function i
///
/// *Arguments*
/// i (int)
/// component
///
/// *Returns*
/// _Function_
Function& operator[] (std::size_t i) const;
private:
std::vector<Function>& _f_e;
};
}
#endif
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