EpetraExt_MMHelpers.h

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//
//     EpetraExt: Epetra Extended - 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.
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// it under the terms of the GNU Lesser General Public License as
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// Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public
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#ifndef EPETRAEXT_MMHELPERS_H
#define EPETRAEXT_MMHELPERS_H

#include <EpetraExt_ConfigDefs.h>
#include <set>
#include <map>

class Epetra_Map;
class Epetra_CrsMatrix;

namespace EpetraExt {

//struct that holds views of the contents of a CrsMatrix. These
//contents may be a mixture of local and remote rows of the
//actual matrix.
class CrsMatrixStruct {
public:
  CrsMatrixStruct();

  virtual ~CrsMatrixStruct();

  void deleteContents();

  int numRows;
  int* numEntriesPerRow;
  int** indices;
  double** values;
  bool* remote;
  int numRemote;
  const Epetra_Map* origRowMap;
  const Epetra_Map* rowMap;
  const Epetra_Map* colMap;
  const Epetra_Map* domainMap;
  const Epetra_Map* importColMap;
  Epetra_CrsMatrix* importMatrix;
};

int dumpCrsMatrixStruct(const CrsMatrixStruct& M);

class CrsWrapper {
 public:
  virtual ~CrsWrapper(){}

  virtual const Epetra_Map& RowMap() const = 0;

  virtual bool Filled() = 0;

  virtual int InsertGlobalValues(int GlobalRow, int NumEntries, double* Values, int* Indices) = 0;

  virtual int SumIntoGlobalValues(int GlobalRow, int NumEntries, double* Values, int* Indices) = 0;
};

class CrsWrapper_Epetra_CrsMatrix : public CrsWrapper {
 public:
  CrsWrapper_Epetra_CrsMatrix(Epetra_CrsMatrix& epetracrsmatrix);
  virtual ~CrsWrapper_Epetra_CrsMatrix();

  const Epetra_Map& RowMap() const;

  bool Filled();

  int InsertGlobalValues(int GlobalRow, int NumEntries, double* Values, int* Indices);
  int SumIntoGlobalValues(int GlobalRow, int NumEntries, double* Values, int* Indices);

 private:
  Epetra_CrsMatrix& ecrsmat_;
};

class CrsWrapper_GraphBuilder : public CrsWrapper {
 public:
  CrsWrapper_GraphBuilder(const Epetra_Map& emap);
  virtual ~CrsWrapper_GraphBuilder();

  const Epetra_Map& RowMap() const {return rowmap_; }

  bool Filled();

  int InsertGlobalValues(int GlobalRow, int NumEntries, double* Values, int* Indices);
  int SumIntoGlobalValues(int GlobalRow, int NumEntries, double* Values, int* Indices);

  std::map<int,std::set<int>*>& get_graph();

  int get_max_row_length() { return max_row_length_; }

 private:
  std::map<int,std::set<int>*> graph_;
  const Epetra_Map& rowmap_;
  int max_row_length_;
};

void insert_matrix_locations(CrsWrapper_GraphBuilder& graphbuilder,
                              Epetra_CrsMatrix& C);

}//namespace EpetraExt

#endif

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