/usr/include/trilinos/RTOpPack_ROpGetElement.hpp is in libtrilinos-dev 10.4.0.dfsg-1ubuntu2.
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// ***********************************************************************
//
// RTOp: Interfaces and Support Software for Vector Reduction Transformation
// Operations
// Copyright (2006) 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 RTOPPACK_ROP_GET_ELEMENT_HPP
#define RTOPPACK_ROP_GET_ELEMENT_HPP
#include "RTOpPack_RTOpTHelpers.hpp"
namespace RTOpPack {
/** \brief . */
template<class Scalar>
class ROpGetElementEleWiseReductionOp {
public:
/** \brief . */
ROpGetElementEleWiseReductionOp(const Ordinal &global_i_in = -1)
:global_i_(global_i_in)
{}
/** \brief . */
Ordinal global_i() const
{
return global_i_;
}
/** \brief . */
void operator()(const index_type i, const Scalar &v0, Scalar &reduct) const
{
if (i == global_i_) {
reduct = v0;
}
}
private:
Ordinal global_i_;
};
/** \brief Returns the value of the element at index <tt>global_i</tt>.
*
* Warning! If the element is not found, then 0 is returned!
*/
template<class Scalar>
class ROpGetElement
: public ROp_1_CoordVariantScalarReduction<
Scalar,
Scalar,
ROpGetElementEleWiseReductionOp<Scalar>
>
{
public:
/** \brief . */
ROpGetElement(const Ordinal &global_i)
{
this->setOpNameBase("ROpGetElement");
this->initialize(global_i);
this->initReductObjValue(ScalarTraits<Scalar>::zero());
}
/** \brief . */
void initialize(const Ordinal &global_i)
{
this->setEleWiseReduction(ROpGetElementEleWiseReductionOp<Scalar>(global_i));
}
/** \brief . */
Scalar operator()(const ReductTarget& reduct_obj ) const
{
return this->getRawVal(reduct_obj);
}
protected:
/** \brief . */
virtual Range1D range_impl() const
{
const Ordinal i = this->getEleWiseReduction().global_i();
return Range1D(i, i);
}
};
} // namespace RTOpPack
#endif // RTOPPACK_ROP_GET_ELEMENT_HPP
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