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RTOpPack_ROpMinIndex.hpp
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00001 // @HEADER
00002 // ***********************************************************************
00003 // 
00004 // RTOp: Interfaces and Support Software for Vector Reduction Transformation
00005 //       Operations
00006 //                Copyright (2006) Sandia Corporation
00007 // 
00008 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00009 // license for use of this work by or on behalf of the U.S. Government.
00010 // 
00011 // This library is free software; you can redistribute it and/or modify
00012 // it under the terms of the GNU Lesser General Public License as
00013 // published by the Free Software Foundation; either version 2.1 of the
00014 // License, or (at your option) any later version.
00015 //  
00016 // This library is distributed in the hope that it will be useful, but
00017 // WITHOUT ANY WARRANTY; without even the implied warranty of
00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00019 // Lesser General Public License for more details.
00020 //  
00021 // You should have received a copy of the GNU Lesser General Public
00022 // License along with this library; if not, write to the Free Software
00023 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00024 // USA
00025 // Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov) 
00026 // 
00027 // ***********************************************************************
00028 // @HEADER
00029 
00030 #ifndef RTOPPACK_ROP_MIN_INDEX_HPP
00031 #define RTOPPACK_ROP_MIN_INDEX_HPP
00032 
00033 
00034 #include "RTOpPack_RTOpTHelpers.hpp"
00035 
00036 
00037 namespace RTOpPack {
00038 
00039 
00041 template<class Scalar>
00042 class ROpMinIndexEleWiseReductionOp {
00043 public:
00045   void operator()(const index_type i, const Scalar &v0,
00046     ScalarIndex<Scalar> &reduct) const
00047     {
00048       if(
00049         v0 < reduct.scalar
00050         ||
00051         ( v0 == reduct.scalar && i < reduct.index )
00052         )
00053       {
00054         reduct = ScalarIndex<Scalar>(v0, i);
00055       }
00056     }
00057 };
00058 
00059 
00061 template<class Scalar>
00062 class ROpMinIndexReductObjReductionOp {
00063 public:
00065   void operator()(
00066     const ScalarIndex<Scalar>& in_reduct, ScalarIndex<Scalar>& inout_reduct
00067     ) const
00068     {
00069       if(
00070         in_reduct.scalar < inout_reduct.scalar
00071         ||
00072         (
00073           in_reduct.scalar == inout_reduct.scalar
00074           &&
00075           in_reduct.index < inout_reduct.index
00076           )
00077         )
00078       {
00079         inout_reduct = in_reduct;
00080       }
00081     }
00082 };
00083 
00084 
00090 template<class Scalar>
00091 class ROpMinIndex
00092   : public ROp_1_CoordVariantScalarReduction<
00093       Scalar,
00094       ScalarIndex<Scalar>,
00095       ROpMinIndexEleWiseReductionOp<Scalar>,
00096       ROpMinIndexReductObjReductionOp<Scalar> >
00097 {
00098 public:
00100   ROpMinIndex()
00101     {
00102       this->setOpNameBase("ROpMinIndex");
00103       this->initReductObjValue(
00104         ScalarIndex<Scalar>(+ScalarTraits<Scalar>::rmax(), -1));
00105     }
00107   ScalarIndex<Scalar> operator()(const ReductTarget& reduct_obj) const
00108     { return this->getRawVal(reduct_obj); }
00109 };
00110 
00111 
00112 } // namespace RTOpPack
00113 
00114 
00115 #endif // RTOPPACK_ROP_MIN_INDEX_HPP
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