/usr/include/libmesh/analytic_function.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: analytic_function.h 4123 2010-12-01 15:55:07Z 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 __analytic_function_h__
#define __analytic_function_h__
// C++ includes
// Local Includes
#include "function_base.h"
namespace libMesh
{
// Forward Declarations
template <typename T>
class DenseVector;
/**
* This class provides function-like objects for which an
* analytical expression can be provided. The user may
* either provide vector-return or number-return functions.
*
* @author Daniel Dreyer, 2003
*/
// ------------------------------------------------------------
// AnalyticFunction class definition
class AnalyticFunction : public FunctionBase
{
public:
/**
* Constructor. Takes a function pointer for scalar
* return values.
*/
AnalyticFunction (Number fptr(const Point& p,
const Real time));
/**
* Constructor. Takes a function pointer for
* vector valued functions.
*/
AnalyticFunction (void fptr(DenseVector<Number>& output,
const Point& p,
const Real time));
/**
* Destructor.
*/
~AnalyticFunction ();
/**
* Pointer to user-provided function that computes
* the boundary values when an analytical expression
* is available.
*/
Number (* _number_fptr) (const Point& p,
const Real time);
/**
* Pointer to user-provided vector valued function.
*/
void (* _vector_fptr) (DenseVector<Number>& output,
const Point& p,
const Real time);
/**
* The actual initialization process.
*/
void init ();
/**
* Clears the function.
*/
void clear ();
/**
* @returns the value at point \p p and time
* \p time, which defaults to zero.
*/
Number operator() (const Point& p,
const Real time=0.);
/**
* Like before, but returns the values in a
* writable reference.
*/
void operator() (const Point& p,
const Real time,
DenseVector<Number>& output);
};
// ------------------------------------------------------------
// AnalyticFunction inline methods
inline
Number AnalyticFunction::operator() (const Point& p,
const Real time)
{
libmesh_assert (this->initialized());
return (this->_number_fptr(p, time));
}
inline
void AnalyticFunction::operator() (const Point& p,
const Real time,
DenseVector<Number>& output)
{
libmesh_assert (this->initialized());
this->_vector_fptr(output, p, time);
return;
}
} // namespace libMesh
#endif
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