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// ***********************************************************************
//
// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
// Copyright (2003) 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 SP_VECTOR_OP_H
#define SP_VECTOR_OP_H
#include "AbstractLinAlgPack_SparseVectorSliceOp.hpp"
#include "AbstractLinAlgPack_SparseElement.hpp"
namespace AbstractLinAlgPack {
/** \brief Add elements from a dense vector to a sparse vector.
*
* Here sv_lhs is not resized and only elements are added.
* The purpose of this function is to add elements from
* a dense vector to a sparse vector.
*
* Postconditions:\begin{itemize}
* \item sv_lhs->nz() == vs_rhs->size() + sv_lhs_before->size()
* \item [sv_lhs_before->is_sorted() || sv_lhs_before->nz() == 0] sv_lhs->is_sorted() == true
* \end{itemize}
*/
void add_elements( SpVector* sv_lhs, value_type alpha, const DVectorSlice& vs_rhs
, size_type offset = 0, bool add_zeros = true );
/** \brief Add elements from a sparse vector to another sparse vector.
*
* Here sv_lhs is not resized and only elements are added.
* The purpose of this function is to add elements from
* a sparse vector to a sparse vector.
*
* Postconditions:\begin{itemize}
* \item sv_lhs->nz() == sv_rhs->nz() + sv_lhs_before->size()
* \item [(sv_lhs_before->is_sorted() || sv_lhs_before->nz() == 0)
* && (sv_rhs.is_sorted() || sv_rhs.nz() == 0)] sv_lhs->is_sorted() == true
* \end{itemize}
*/
void add_elements( SpVector* sv_lhs, value_type alpha, const SpVectorSlice& sv_rhs
, size_type offset = 0, bool add_zeros = true );
inline
/** \brief Create a dense representation of a sparse vector.
*
* The primary use if the function is to create a DVectorSlice
* object that only represents the nonzero values of the
* sparse vector. This could have several different uses
* but one of the most significant examples is when you want
* to discard the indices when sv_rhs->size() == sv_rhs->nz() and
* sv_rhs->is_sorted() == true.
*/
DVectorSlice dense_view( SpVectorSlice& sv_rhs );
inline
/** \brief . */
const DVectorSlice dense_view( const SpVectorSlice& sv_rhs );
} // end namespace AbstractLinAlgPack
// /////////////////////////////////////////
// Inline function definitions
inline
DenseLinAlgPack::DVectorSlice
AbstractLinAlgPack::dense_view( SpVectorSlice& sv_rhs )
{
return sv_rhs.nz()
? DVectorSlice( &sv_rhs.begin()->value(), sv_rhs.nz(), 2 )
: DVectorSlice( NULL, 0, 0 );
}
inline
const DenseLinAlgPack::DVectorSlice
AbstractLinAlgPack::dense_view( const SpVectorSlice& sv_rhs )
{
return sv_rhs.nz()
? DVectorSlice( &const_cast<SpVectorSlice&>(sv_rhs).begin()->value(), sv_rhs.nz(), 2 )
: DVectorSlice( NULL, 0, 0 );
}
#endif // SP_VECTOR_CLASS_H
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