/usr/include/trilinos/RTOpPack_ROpMinIndex.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_MIN_INDEX_HPP
#define RTOPPACK_ROP_MIN_INDEX_HPP
#include "RTOpPack_RTOpTHelpers.hpp"
namespace RTOpPack {
/** \brief . */
template<class Scalar>
class ROpMinIndexEleWiseReductionOp {
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 ROpMinIndexReductObjReductionOp {
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 minimum 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 ROpMinIndex
: public ROp_1_CoordVariantScalarReduction<
Scalar,
ScalarIndex<Scalar>,
ROpMinIndexEleWiseReductionOp<Scalar>,
ROpMinIndexReductObjReductionOp<Scalar> >
{
public:
/** \brief . */
ROpMinIndex()
{
this->setOpNameBase("ROpMinIndex");
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_MIN_INDEX_HPP
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