Ifpack_AMDReordering.h

/*@HEADER
// ***********************************************************************
//
//       Ifpack: Object-Oriented Algebraic Preconditioner Package
//                 Copyright (2002) 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.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
*/

#ifndef IFPACK_AMDREORDERING_H
#define IFPACK_AMDREORDERING_H

#include "Ifpack_ConfigDefs.h"
#include "Ifpack_Reordering.h"

namespace Teuchos {
  class ParameterList;
}
class Ifpack_Graph;
class Epetra_MultiVector;
class Epetra_RowMatrix;


class Ifpack_AMDReordering : public Ifpack_Reordering {

public:

  Ifpack_AMDReordering();

  Ifpack_AMDReordering(const Ifpack_AMDReordering& RHS);

  Ifpack_AMDReordering& operator=(const Ifpack_AMDReordering& RHS);

  virtual ~Ifpack_AMDReordering() {};
  
  int SetParameter(const string Name, const int Value);

  int SetParameter(const string Name, const double Value);
  
  int SetParameters(Teuchos::ParameterList& List);

  int Compute(const Ifpack_Graph& Graph);

  int Compute(const Epetra_RowMatrix& Matrix);

  bool IsComputed() const
  {
    return(IsComputed_);
  }

  inline int Reorder(const int i) const;

  inline int InvReorder(const int i) const;

  int P(const Epetra_MultiVector& Xorig,
    Epetra_MultiVector& Xreord) const;

  int Pinv(const Epetra_MultiVector& Xorig,
       Epetra_MultiVector& Xinvreord) const;

  
  ostream& Print(std::ostream& os) const;

  int NumMyRows() const 
  {
    return(NumMyRows_);
  }

private:
  int NumMyRows_;
  bool IsComputed_;
  std::vector<int> Reorder_;
  std::vector<int> InvReorder_;
}; 

#endif