EpetraExt_BlockUtility.h

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00001 //@HEADER
00002 /*
00003 ************************************************************************
00004 
00005               EpetraExt: Extended Linear Algebra Services Package 
00006                 Copyright (2001) 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 Michael A. Heroux (maherou@sandia.gov) 
00026 
00027 ************************************************************************
00028 */
00029 //@HEADER
00030 
00031 #ifndef EPETRAEXT_BLOCKUTILITY_H
00032 #define EPETRAEXT_BLOCKUTILITY_H
00033 
00034 #include <vector>
00035 
00036 #include <Epetra_CrsGraph.h>
00037 #include <Epetra_RowMatrix.h>
00038 
00040 
00041 namespace EpetraExt {
00042 
00043 class BlockUtility {
00044  public:
00045 
00053   static Epetra_Map * GenerateBlockMap( const Epetra_BlockMap & BaseMap, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
00054 
00056 
00065   static Epetra_CrsGraph * GenerateBlockGraph( const Epetra_CrsGraph & BaseGraph, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
00066 
00067   // Nearly identical version yet using RowMatrix interface instead of CrsGraph
00068   static Epetra_CrsGraph * GenerateBlockGraph( const Epetra_RowMatrix & BaseMatrix, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
00069 
00071   static int CalculateOffset(const Epetra_BlockMap & BaseMap);
00072   
00073 };
00074 
00075 } //namespace EpetraExt
00076 
00077 #endif /* EPETRA_CRSMATRIX_H */

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