Ifpack_SPARSKIT.h

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//       Ifpack: Object-Oriented Algebraic Preconditioner Package
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#ifndef IFPACK_SPARSKIT_H
#define IFPACK_SPARSKIT_H

#include "Ifpack_ConfigDefs.h"
#ifdef HAVE_IFPACK_SPARSKIT
#include "Ifpack_CondestType.h"
#include "Ifpack_ScalingType.h"
#include "Ifpack_Preconditioner.h"
#include "Epetra_Vector.h"
#include "Epetra_RowMatrix.h"
class Epetra_Comm;
class Epetra_Map;
class Epetra_MultiVector;
namespace Teuchos {
  class ParameterList;
}


class Ifpack_SPARSKIT: public Ifpack_Preconditioner {
      
 public:
  Ifpack_SPARSKIT(Epetra_RowMatrix* A);
  
  virtual ~Ifpack_SPARSKIT();

  /* This method is only available if the Teuchos package is enabled.
     This method recognizes five parameter names: level_fill, drop_tolerance,
     absolute_threshold, relative_threshold and overlap_mode. These names are
     case insensitive. For level_fill the ParameterEntry must have type int, the 
     threshold entries must have type double and overlap_mode must have type
     Epetra_CombineMode.
  */
  int SetParameters(Teuchos::ParameterList& parameterlis);

  int SetParameter(const string Name, const int Value)
  {
    IFPACK_CHK_ERR(-98);
  }
  int SetParameter(const string Name, const double Value)
  {
    IFPACK_CHK_ERR(-98);
  }

  const Epetra_RowMatrix& Matrix() const
  {
    return(A_);
  }

  Epetra_RowMatrix& Matrix()
  {
    return(A_);
  }

  bool IsInitialized() const
  {
    return(IsInitialized_);
  }

  int Initialize();

  int Compute();

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

  // Mathematical functions.
  

  int ApplyInverse(const Epetra_MultiVector& X, Epetra_MultiVector& Y) const;

  int Apply(const Epetra_MultiVector& X, Epetra_MultiVector& Y) const
  {
    IFPACK_CHK_ERR(-1);
  }


  double Condest(const Ifpack_CondestType CT = Ifpack_Cheap, 
                 const int MaxIters = 1550, 
                 const double Tol = 1e-9,
         Epetra_RowMatrix* Matrix = 0);

  double Condest() const
  {
    return(Condest_);
  }

  // Attribute access functions
  


  int SetUseTranspose(bool UseTranspose) {UseTranspose_ = UseTranspose; return(0);};

    double NormInf() const {return(0.0);};

    bool HasNormInf() const {return(false);};

    bool UseTranspose() const {return(UseTranspose_);};

    const Epetra_Map & OperatorDomainMap() const {return(A_.OperatorDomainMap());};

    const Epetra_Map & OperatorRangeMap() const{return(A_.OperatorRangeMap());};

    const Epetra_Comm & Comm() const{return(Comm_);};

    const char* Label() const
    {
      return(Label_.c_str());
    }

    int SetLabel(const char* Label)
    {
      Label_ = Label;
      return(0);
    }
 
  virtual ostream& Print(std::ostream& os) const;

  virtual int NumInitialize() const
  {
    return(NumInitialize_);
  }

  virtual int NumCompute() const
  {
    return(NumCompute_);
  }

  virtual int NumApplyInverse() const
  {
    return(NumApplyInverse_);
  }

  virtual double InitializeTime() const
  {
    return(InitializeTime_);
  }

  virtual double ComputeTime() const
  {
    return(ComputeTime_);
  }

  virtual double ApplyInverseTime() const
  {
    return(ApplyInverseTime_);
  }

  virtual double InitializeFlops() const
  {
    return(0.0);
  }

  virtual double ComputeFlops() const
  {
    return(0.0);
  }

  virtual double ApplyInverseFlops() const
  {
    return(0.0);
  }

private:
  Epetra_RowMatrix& A_;
  const Epetra_Comm& Comm_;
  bool UseTranspose_;
  int lfil_;
  double droptol_;
  double tol_;
  double permtol_;
  double alph_;
  int mbloc_;
  string Type_;

  // Factorization in MSR format.
  std::vector<double> alu_;
  std::vector<int> jlu_;
  std::vector<int> ju_;

  string Label_;
  // Permutation vector if required by ILUTP and ILUDP.
  std::vector<int> iperm_;

  double Condest_;

  bool IsInitialized_;
  bool IsComputed_;
 
  int NumInitialize_;
  int NumCompute_;
  mutable int NumApplyInverse_;

  double InitializeTime_;
  double ComputeTime_;
  mutable double ApplyInverseTime_;

  double ComputeFlops_;
  mutable double ApplyInverseFlops_;

};

#endif // HAVE_IFPACK_SPARSKIT
#endif /* IFPACK_SPARSKIT_H */