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/*
************************************************************************
Epetra: Linear Algebra Services Package
Copyright (2001) 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 EPETRA_OFFSETINDEX_H
#define EPETRA_OFFSETINDEX_H
#include "Epetra_Object.h"
class Epetra_Import;
class Epetra_Export;
class Epetra_CrsGraph;
class Epetra_Distributor;
//! Epetra_OffsetIndex: This class builds index for efficient mapping of data from one Epetra_CrsGraph based object to another.
/*! Epetra_OffsetIndex generates and index of offsets allowing direct access to data
for Import/Export operations on Epetra_CrsGraph based objects such as Epetra_CrsMatrix.
*/
class EPETRA_LIB_DLL_EXPORT Epetra_OffsetIndex: public Epetra_Object {
public:
//! Constructs a Epetra_OffsetIndex object from the graphs and an importer.
Epetra_OffsetIndex( const Epetra_CrsGraph & SourceGraph,
const Epetra_CrsGraph & TargetGraph,
Epetra_Import & Importer );
//! Constructs a Epetra_OffsetIndex object from the graphs and an exporter.
Epetra_OffsetIndex( const Epetra_CrsGraph & SourceGraph,
const Epetra_CrsGraph & TargetGraph,
Epetra_Export & Exporter );
//! Epetra_OffsetIndex copy constructor.
Epetra_OffsetIndex(const Epetra_OffsetIndex & Indexor);
//! Epetra_OffsetIndex destructor.
virtual ~Epetra_OffsetIndex(void);
//! @name Print object to an output stream
//@{
virtual void Print(ostream & os) const;
//@}
//! Accessor
int ** SameOffsets() const { return SameOffsets_; }
//! Accessor
int ** PermuteOffsets() const { return PermuteOffsets_; }
//! Accessor
int ** RemoteOffsets() const { return RemoteOffsets_; }
private:
void GenerateLocalOffsets_( const Epetra_CrsGraph & SourceGraph,
const Epetra_CrsGraph & TargetGraph,
const int * PermuteLIDs );
void GenerateRemoteOffsets_( const Epetra_CrsGraph & SourceGraph,
const Epetra_CrsGraph & TargetGraph,
const int * ExportLIDs,
const int * RemoteLIDs,
Epetra_Distributor & Distor );
//! Epetra_OffsetIndex copy constructor.
Epetra_OffsetIndex & operator=(const Epetra_OffsetIndex & Indexor);
public:
int NumSame_;
int ** SameOffsets_;
int NumPermute_;
int ** PermuteOffsets_;
int NumExport_;
int NumRemote_;
int ** RemoteOffsets_;
bool DataOwned_;
};
#endif /* EPETRA_OFFSETINDEX_H */
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