EpetraExt_SymmRCM_CrsGraph.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_CRSGRAPH_SYMMRCM_H
00030 #define EpetraExt_CRSGRAPH_SYMMRCM_H
00031 
00032 #include <vector>
00033 
00034 #include <EpetraExt_Transform.h>
00035 
00036 class Epetra_Map;
00037 class Epetra_CrsGraph;
00038 
00039 namespace EpetraExt {
00040 
00042 struct CrsGraph_SymmRCM : public StructuralSameTypeTransform<Epetra_CrsGraph> {
00043 
00044  public:
00045 
00047   ~CrsGraph_SymmRCM();
00048 
00050   CrsGraph_SymmRCM( bool BruteForce = false, int testLeafWidth = 5 )
00051   : bruteForce_(BruteForce),
00052     testLeafWidth_(testLeafWidth),
00053     RCMMap_(0),
00054     RCMColMap_(0)
00055   {}
00056 
00058   NewTypeRef operator()( OriginalTypeRef orig );
00059 
00060  private:
00061 
00062   Epetra_Map * RCMMap_;
00063   Epetra_Map * RCMColMap_;
00064   const int testLeafWidth_;
00065   const bool bruteForce_;
00066 
00067   class BFT {
00068     
00069    public:
00070 
00071     BFT( const std::vector< std::vector<int> > & adjlist,
00072           int root,
00073           int max_width,
00074           bool & failed );
00075 
00076      int Width() { return width_; }
00077      int Depth() { return depth_; }
00078 
00079      void NonNeighborLeaves( std::vector<int> & leaves,
00080                              const std::vector< std::vector<int> > & adjlist,
00081                              int count );
00082      void ReverseVector( std::vector<int> & ordered );
00083 
00084    private:
00085 
00086      bool failed_;
00087      int width_;
00088      int depth_;
00089      int nodes_;
00090 
00091      std::vector< std::vector<int> > levelSets_;
00092   };
00093 
00094 };
00095 
00096 } //namespace EpetraExt
00097 
00098 #endif //EpetraExt_CRSGRAPH_SYMMRCM_H

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