EpetraExt_BlockCrsMatrix.h

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#ifndef EPETRAEXT_BLOCKCRSMATRIX_H
#define EPETRAEXT_BLOCKCRSMATRIX_H

#include <vector>

#include "Epetra_ConfigDefs.h" 
#include "Epetra_CrsMatrix.h" 


namespace EpetraExt {

class BlockCrsMatrix: public Epetra_CrsMatrix {
 public:


#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const std::vector<int> & RowStencil, int RowIndex, const Epetra_Comm & GlobalComm );
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const std::vector<long long> & RowStencil, long long RowIndex, const Epetra_Comm & GlobalComm );
#endif


#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const std::vector< std::vector<long long> > & RowStencil, const std::vector<long long> & RowIndices, const Epetra_Comm & GlobalComm );
#endif

  BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const Epetra_CrsGraph& LocalBlockGraph, const Epetra_Comm & GlobalComm );

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  BlockCrsMatrix( const Epetra_RowMatrix & BaseMatrix, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  BlockCrsMatrix( const Epetra_RowMatrix & BaseMatrix, const std::vector< std::vector<long long> > & RowStencil, const std::vector<long long> & RowIndices, const Epetra_Comm & GlobalComm );
#endif
  
  BlockCrsMatrix( const BlockCrsMatrix & Matrix );

  virtual ~BlockCrsMatrix();
  
#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  const std::vector<int> & Stencil( int i = 0 ) {
    if(BaseGraph_.RowMap().GlobalIndicesInt())
      return RowStencil_int_[i];
    else
      throw "EpetraExt::BlockCrsMatrix::Stencil: Global Indices not int";
  }

  int RowIndex( int i = 0 ) {
    if(BaseGraph_.RowMap().GlobalIndicesInt())
      return RowIndices_int_[i];
    else
      throw "EpetraExt::BlockCrsMatrix::RowIndex: Global Indices not int";
  }
#endif

#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  const std::vector<long long> & Stencil64( int i = 0 ) {
    if(BaseGraph_.RowMap().GlobalIndicesLongLong())
      return RowStencil_LL_[i];
    else
      throw "EpetraExt::BlockCrsMatrix::Stencil: Global Indices not long long";
  }

  long long RowIndex64( int i = 0 ) {
    if(BaseGraph_.RowMap().GlobalIndicesLongLong())
      return RowIndices_LL_[i];
    else
      throw "EpetraExt::BlockCrsMatrix::RowIndex: Global Indices not long long";
  }
#endif

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  void LoadBlock(const Epetra_RowMatrix & BaseMatrix, const int Row, const int Col);
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  void LoadBlock(const Epetra_RowMatrix & BaseMatrix, const long long Row, const long long Col);
#endif

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  void SumIntoBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const int Row, const int Col);
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  void SumIntoBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const long long Row, const long long Col);
#endif

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  void SumIntoGlobalBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const int Row, const int Col);
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  void SumIntoGlobalBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const long long Row, const long long Col);
#endif

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  void BlockSumIntoGlobalValues(const int BaseRow, int NumIndices,
     double* Values, const int* Indices, const int Row, const int Col);
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  void BlockSumIntoGlobalValues(const long long BaseRow, int NumIndices,
     double* Values, const long long* Indices, const long long Row, const long long Col);
#endif

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  void BlockReplaceGlobalValues(const int BaseRow, int NumIndices,
     double* Values, const int* Indices, const int Row, const int Col);
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  void BlockReplaceGlobalValues(const long long BaseRow, int NumIndices,
     double* Values, const long long* Indices, const long long Row, const long long Col);
#endif

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  void BlockExtractGlobalRowView(const int BaseRow, int& NumEntries, 
     double*& Values, const int Row, const int Col);
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  void BlockExtractGlobalRowView(const long long BaseRow, int& NumEntries, 
     double*& Values, const long long Row, const long long Col);
#endif

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  void ExtractBlock(Epetra_CrsMatrix & BaseMatrix, const int Row, const int Col);
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  void ExtractBlock(Epetra_CrsMatrix & BaseMatrix, const long long Row, const long long Col);
#endif

 protected:

  Epetra_CrsGraph BaseGraph_;

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  std::vector< std::vector<int> > RowStencil_int_;

  std::vector<int> RowIndices_int_; 
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  std::vector< std::vector<long long> > RowStencil_LL_;

  std::vector<long long> RowIndices_LL_; 
#endif

  long long ROffset_;
  long long COffset_;

private:
  template<typename int_type>
  void TLoadBlock(const Epetra_RowMatrix & BaseMatrix, const int_type Row, const int_type Col);

  template<typename int_type>
  void TSumIntoBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const int_type Row, const int_type Col);

  template<typename int_type>
  void TSumIntoGlobalBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const int_type Row, const int_type Col);

  template<typename int_type>
  void TBlockSumIntoGlobalValues(const int_type BaseRow, int NumIndices,
     double* Values, const int_type* Indices, const int_type Row, const int_type Col);

  template<typename int_type>
  void TBlockReplaceGlobalValues(const int_type BaseRow, int NumIndices,
     double* Values, const int_type* Indices, const int_type Row, const int_type Col);

  template<typename int_type>
  void TBlockExtractGlobalRowView(const int_type BaseRow, int& NumEntries, 
     double*& Values, const int_type Row, const int_type Col);

  template<typename int_type>
  void TExtractBlock(Epetra_CrsMatrix & BaseMatrix, const int_type Row, const int_type Col);

  template<typename int_type>
  std::vector< std::vector<int_type> >& TRowStencil();

  template<typename int_type>
  std::vector<int_type>& TRowIndices();
};

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
template<> inline std::vector<int>& BlockCrsMatrix::TRowIndices() { return RowIndices_int_; }
template<> inline std::vector< std::vector<int> >& BlockCrsMatrix::TRowStencil() { return RowStencil_int_; }
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
template<> inline std::vector<long long>& BlockCrsMatrix::TRowIndices() { return RowIndices_LL_; }
template<> inline std::vector< std::vector<long long> >& BlockCrsMatrix::TRowStencil() { return RowStencil_LL_; }
#endif

} //namespace EpetraExt

#endif /* EPETRA_CRSMATRIX_H */