/usr/include/trilinos/RTOpPack_ROpGetElement.hpp is in libtrilinos-rtop-dev 12.12.1-5.
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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.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// @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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