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EpetraExt_BlockAdjacencyGraph.h
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00001 //@HEADER
00002 // ***********************************************************************
00003 // 
00004 //     EpetraExt: Epetra Extended - Linear Algebra Services Package
00005 //                 Copyright (2001) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 //@HEADER
00028                                                                                                     
00029 #ifndef EpetraExt_BLOCK_ADJACENCY_GRAPH_H
00030 #define EpetraExt_BLOCK_ADJACENCY_GRAPH_H
00031 
00032 class Epetra_CrsGraph;
00033 
00034 #include <Teuchos_RCP.hpp>
00035 #include <vector>
00036 
00037 namespace EpetraExt {
00038 
00040 
00047 int compare_ints(const void *a, const void *b);
00048 
00049 class BlockAdjacencyGraph {
00050 
00051 public:
00052 
00054 
00056   ~BlockAdjacencyGraph() {}
00057 
00059 
00061   BlockAdjacencyGraph() {}
00062 
00064 
00072    Teuchos::RCP<Epetra_CrsGraph> compute( Epetra_CrsGraph& B, int nbrr, std::vector<int>&r, std::vector<double>& weights, bool verbose = false);
00073 
00074 private:
00075 
00076   // Some binary search tree helper functions.
00077   int* csr_bst( int n );
00078   int csr_bstrootindex( int n );
00079 
00080 };
00081 
00082 } //namespace EpetraExt
00083 
00084 #endif //EpetraExt_BLOCK_ADJACENCY_GRAPH_H
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