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Ifpack_RCMReordering.h
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00001 /*@HEADER
00002 // ***********************************************************************
00003 //
00004 //       Ifpack: Object-Oriented Algebraic Preconditioner Package
00005 //                 Copyright (2002) 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 
00030 #ifndef IFPACK_RCMREORDERING_H
00031 #define IFPACK_RCMREORDERING_H
00032 
00033 #include "Ifpack_ConfigDefs.h"
00034 #include "Ifpack_Reordering.h"
00035 
00036 namespace Teuchos {
00037   class ParameterList;
00038 }
00039 class Ifpack_Graph;
00040 class Epetra_MultiVector;
00041 class Epetra_RowMatrix;
00042 
00044 
00045 class Ifpack_RCMReordering : public Ifpack_Reordering {
00046 
00047 public:
00048 
00050   Ifpack_RCMReordering();
00051 
00053   Ifpack_RCMReordering(const Ifpack_RCMReordering& RHS);
00054 
00056   Ifpack_RCMReordering& operator=(const Ifpack_RCMReordering& RHS);
00057 
00059   virtual ~Ifpack_RCMReordering() {};
00060   
00062   virtual int SetParameter(const string Name, const int Value);
00063 
00065   virtual int SetParameter(const string Name, const double Value);
00066   
00068   virtual int SetParameters(Teuchos::ParameterList& List);
00069 
00071   virtual int Compute(const Ifpack_Graph& Graph);
00072 
00074   virtual int Compute(const Epetra_RowMatrix& Matrix);
00075 
00077   virtual bool IsComputed() const
00078   {
00079     return(IsComputed_);
00080   }
00081 
00083   virtual inline int Reorder(const int i) const;
00084 
00086   virtual inline int InvReorder(const int i) const;
00087 
00089   virtual int P(const Epetra_MultiVector& Xorig,
00090     Epetra_MultiVector& Xreord) const;
00091 
00093   virtual int Pinv(const Epetra_MultiVector& Xorig,
00094        Epetra_MultiVector& Xinvreord) const;
00095 
00096   
00098   virtual ostream& Print(std::ostream& os) const;
00099 
00101   virtual int NumMyRows() const 
00102   {
00103     return(NumMyRows_);
00104   }
00105 
00107   virtual int RootNode() const 
00108   {
00109     return(RootNode_);
00110   }
00111 
00112 private:
00114   int RootNode_;
00116   int NumMyRows_;
00118   bool IsComputed_;
00120   std::vector<int> Reorder_;
00122   std::vector<int> InvReorder_;
00123 }; 
00124 
00125 #endif
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