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/*
************************************************************************
EpetraExt: Extended Linear Algebra Services Package
Copyright (2001) 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 Michael A. Heroux (maherou@sandia.gov)
************************************************************************
*/
//@HEADER
#ifndef EPETRAEXT_BLOCKUTILITY_H
#define EPETRAEXT_BLOCKUTILITY_H
#include <vector>
#include <Epetra_CrsGraph.h>
#include <Epetra_RowMatrix.h>
//! EpetraExt::BlockUtility: A class of utilities for constructing block data structs
namespace EpetraExt {
class BlockUtility {
public:
/*! Creates a BlockMap object
\param In
BaseMap - Map determining individual block structure, can be distrib. over subset of proc.'s
\param In
RowIndices - Defines the indices for local block rows
*/
static Epetra_Map * GenerateBlockMap( const Epetra_BlockMap & BaseMap, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
//! BlockCrsMatrix constuctor
/*! Creates a BlockGraph object
\param In
BaseGraph - Graph determining individual block structure, can be distrib. over subset of proc.'s
\param In
RowStencil - Describes the stencil for block rows on this processor (i.e. (-1 0 1) centered difference)
\param In
RowIndices - Defines the indices for local block rows
*/
static Epetra_CrsGraph * GenerateBlockGraph( const Epetra_CrsGraph & BaseGraph, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
// Nearly identical version yet using RowMatrix interface instead of CrsGraph
static Epetra_CrsGraph * GenerateBlockGraph( const Epetra_RowMatrix & BaseMatrix, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
//! Routine for calculating Offset for creating unique global IDs for Block representation
static int CalculateOffset(const Epetra_BlockMap & BaseMap);
};
} //namespace EpetraExt
#endif /* EPETRA_CRSMATRIX_H */
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