/usr/include/trilinos/RTOpPack_ROpMaxIndex.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.
//
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// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
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//
// 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
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// @HEADER
#ifndef RTOPPACK_ROP_MAX_INDEX_HPP
#define RTOPPACK_ROP_MAX_INDEX_HPP
#include "RTOpPack_RTOpTHelpers.hpp"
namespace RTOpPack {
/** \brief . */
template<class Scalar>
class ROpMaxIndexEleWiseReductionOp {
public:
/** \brief . */
void operator()(const index_type i, const Scalar &v0,
ScalarIndex<Scalar> &reduct) const
{
if(
v0 > reduct.scalar
||
(v0 == reduct.scalar && i < reduct.index)
)
{
reduct = ScalarIndex<Scalar>(v0, i);
}
}
};
/** \brief. */
template<class Scalar>
class ROpMaxIndexReductObjReductionOp {
public:
/** \brief . */
void operator()(
const ScalarIndex<Scalar>& in_reduct, ScalarIndex<Scalar>& inout_reduct
) const
{
if(
in_reduct.scalar > inout_reduct.scalar
||
(
in_reduct.scalar == inout_reduct.scalar
&&
in_reduct.index < inout_reduct.index
)
)
{
inout_reduct = in_reduct;
}
}
};
/** \brief Returns the maximum element and its index:
* <tt>result.scalar = x(k)</tt> and <tt>result.index = k</tt> such
* that <tt>x(k) >= x(i)</tt> for <tt>i=0...n-1</tt> and <tt>k</tt> is
* the minimum index to break ties.
*/
template<class Scalar>
class ROpMaxIndex
: public ROp_1_CoordVariantScalarReduction<
Scalar,
ScalarIndex<Scalar>,
ROpMaxIndexEleWiseReductionOp<Scalar>,
ROpMaxIndexReductObjReductionOp<Scalar> >
{
public:
/** \brief . */
ROpMaxIndex()
{
this->setOpNameBase("ROpMaxIndex");
this->initReductObjValue(
ScalarIndex<Scalar>(-ScalarTraits<Scalar>::rmax(), -1));
}
/** \brief . */
ScalarIndex<Scalar> operator()(const ReductTarget& reduct_obj) const
{ return this->getRawVal(reduct_obj); }
};
} // namespace RTOpPack
#endif // RTOPPACK_ROP_MAX_INDEX_HPP
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