/usr/include/trilinos/OptiPack_DefaultPolyLineSearchPointEvaluator.hpp 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | /*
// @HEADER
// ***********************************************************************
//
// OptiPack: Collection of simple Thyra-based Optimization ANAs
// Copyright (2009) 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? Contact Roscoe A. Bartlett (rabartl@sandia.gov)
//
// ***********************************************************************
// @HEADER
*/
#ifndef OPTIPACK_DEFAULT_POLY_LINE_SEARCH_POINT_EVALUATOR_HPP
#define OPTIPACK_DEFAULT_POLY_LINE_SEARCH_POINT_EVALUATOR_HPP
#include "OptiPack_LineSearchPointEvaluatorBase.hpp"
#include "Thyra_VectorStdOps.hpp"
namespace OptiPack {
/** \brief Default line search point evaluator using a polynomial linear
* combination of vectors.
*
* This object computes:
\verbatim
p = sum( alpha^i * vec[i], i = 0...n-1 )
\endverbatim
* This allows, for instance, a curvy-linear line search algorithm.
*/
template<typename Scalar>
class DefaultPolyLineSearchPointEvaluator : public LineSearchPointEvaluatorBase<Scalar>
{
public:
/** \brief . */
typedef typename ScalarTraits<Scalar>::magnitudeType ScalarMag;
/** \name Constructors/intializers/accessors. */
//@{
/** \brief . */
DefaultPolyLineSearchPointEvaluator();
/** \brief . */
void initialize(const ArrayView<const RCP<const Thyra::VectorBase<Scalar> > > &vecs);
//@}
/** \name Overridden from LineSearchPointEvaluatorBase. */
//@{
/** \brief . */
virtual void computePoint( const ScalarMag &alpha,
const Ptr<Thyra::VectorBase<Scalar> > &p
) const;
//@}
private:
Array<RCP<const Thyra::VectorBase<Scalar> > > vecs_;
};
/** \brief Nonmember constructor.
*
* \relates DefaultPolyLineSearchPointEvaluator
*/
template<typename Scalar>
const RCP<DefaultPolyLineSearchPointEvaluator<Scalar> >
defaultPolyLineSearchPointEvaluator()
{
return Teuchos::rcp(new DefaultPolyLineSearchPointEvaluator<Scalar>);
}
//
// Implementations
//
// Constructors/intializers/accessors
template<typename Scalar>
DefaultPolyLineSearchPointEvaluator<Scalar>::DefaultPolyLineSearchPointEvaluator()
{}
template<typename Scalar>
void DefaultPolyLineSearchPointEvaluator<Scalar>::initialize(
const ArrayView<const RCP<const Thyra::VectorBase<Scalar> > > &vecs
)
{
#ifdef TEUCHOS_DEBUG
TEUCHOS_ASSERT(vecs.size());
#endif
vecs_ = vecs;
}
// Overridden from LineSearchPointEvaluatorBase
template<typename Scalar>
void DefaultPolyLineSearchPointEvaluator<Scalar>::computePoint( const ScalarMag &alpha,
const Ptr<Thyra::VectorBase<Scalar> > &p
) const
{
typedef ScalarTraits<Scalar> ST;
using Teuchos::as;
using Thyra::V_V;
using Thyra::Vp_StV;
V_V( p, *vecs_[0] );
if (alpha != ST::zero()) {
ScalarMag alpha_i = alpha;
const int n = vecs_.size();
for (int i = 1; i < n; ++i, alpha_i *= alpha) {
Vp_StV(p, alpha_i, *vecs_[i]);
}
}
}
} // namespace OptiPack
#endif // OPTIPACK_DEFAULT_POLY_LINE_SEARCH_POINT_EVALUATOR_HPP
|