Ifpack_Utils.h

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/*@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.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
*/

#ifndef IFPACK_UTILS_H
#define IFPACK_UTILS_H

#include "Ifpack_ConfigDefs.h"
#include "Epetra_Comm.h"
#if !( defined(_WIN32) )
#  include "unistd.h" // Not a standard header file!
#endif
class Epetra_RowMatrix;
class Epetra_CrsMatrix;
class Epetra_CrsGraph;
class Epetra_RowMatrix;
class Epetra_MultiVector;
class Epetra_Vector;


void Ifpack_PrintLine();

void Ifpack_BreakForDebugger(Epetra_Comm& Comm);

Epetra_CrsMatrix* Ifpack_CreateOverlappingCrsMatrix(const Epetra_RowMatrix* Matrix,
                            const int OverlappingLevel);

Epetra_CrsGraph* Ifpack_CreateOverlappingCrsMatrix(const Epetra_CrsGraph* Graph,
                           const int OverlappingLevel);

string Ifpack_toString(const int& x);

string Ifpack_toString(const double& x);

int Ifpack_PrintResidual(char* Label,  const Epetra_RowMatrix& A,
                         const Epetra_MultiVector& X, const Epetra_MultiVector&Y);

int Ifpack_PrintResidual(const int iter, const Epetra_RowMatrix& A,
                         const Epetra_MultiVector& X, const Epetra_MultiVector&Y);

void Ifpack_PrintSparsity_Simple(const Epetra_RowMatrix& A);

int Ifpack_Analyze(const Epetra_RowMatrix& A, const bool Cheap = false,
                   const int NumPDEEqns = 1);


int Ifpack_AnalyzeMatrixElements(const Epetra_RowMatrix& A,
                                 const bool abs = false, 
                                 const int steps = 10);


int Ifpack_AnalyzeVectorElements(const Epetra_Vector& Diagonal,
                                 const bool abs = false, 
                                 const int steps = 10);


int Ifpack_PrintSparsity(const Epetra_RowMatrix& A, const char* FileName = 0, 
                         const int NumPDEEqns = 1);

//==============================================================================
class Ifpack_Element {

public:
  Ifpack_Element() {};

  Ifpack_Element(const Ifpack_Element& rhs) {
    i_ = rhs.Index();
    val_ = rhs.Value();
    aval_ = rhs.AbsValue();
  }

  inline int Index() const {
    return(i_);
  }

  inline double Value() const {
    return(val_);
  }

  inline double AbsValue() const {
    return(aval_);
  }

  inline void SetIndex(const int i)
  {
    i_ = i;
  }

  inline void SetValue(const double val)
  {
    val_ = val;
    aval_ = IFPACK_ABS(val_);
  }

  inline bool operator <(const Ifpack_Element& rhs) const 
  {
    if (rhs.AbsValue() > AbsValue())
      return(false);
    else if (rhs.AbsValue() < AbsValue())
      return(true);
    else if (rhs.Index() < Index())
        return(true);
    return(false);
  }

private:
  int i_;
  double val_;
  double aval_;

};

#endif // IFPACK_UTILS_H