Epetra_FastCrsMatrix.h

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#ifndef EPETRA_FASTCRSMATRIX_H
#define EPETRA_FASTCRSMATRIX_H

#include "Epetra_Operator.h"
#include "Epetra_CrsMatrix.h"
class Epetra_Vector;
class Epetra_MultiVector;


class Epetra_FastCrsOperator: public Epetra_CompObject, public virtual Epetra_Operator  {

 public:


  Epetra_FastCrsOperator(const Epetra_CrsMatrix & Matrix, bool UseFloats = false);

  virtual ~Epetra_FastCrsOperator();


  /* Updates the values only using a matrix that has exactly the same structure as
     the matrix used to construct this Epetra_FastCrsOperator object.
  */
  int UpdateValues(const Epetra_CrsMatrix & Matrix);



    char * Label() const {return(CrsMatrix_.Label());};


  int SetUseTranspose(bool UseTranspose) {return(CrsMatrix_.SetUseTranspose());};

  /* Returns the quantity \f$ \| A \|_\infty\f$ such that
     \f[\| A \|_\infty = \max_{1\lei\lem} \sum_{j=1}^n |a_{ij}| \f].
  */
  double NormInf() const {return(CrsMatrix_.NormInf());};

  const Epetra_Comm & Comm() const {return(CrsMatrix_.Comm());};


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


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

  bool HasNormInf() const {return(CrsMatrix_.HasNormInf());};

  bool UseTranspose() const {return(CrsMatrix_.UseTranspose());};

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

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



 protected:
  int Allocate(bool UseFloats);
  const Epetra_CrsMatrix & CrsMatrix_;
  int NumMyRows_;
  int NumMyNonzeros_;
  double *Values_;
  float * FloatValues_;
  int * Indices_;
  unsigned short * ShortIndices_;

  bool UsingFloats_;
  bool UsingShorts_;
  bool ValuesAllocated_;


  mutable Epetra_MultiVector * ImportVector_;
  mutable Epetra_MultiVector * ExportVector_;

};
#endif /* EPETRA_FASTCRSMATRIX_H */