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EpetraExt_BlockCrsMatrix.h
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00004 //     EpetraExt: Epetra Extended - Linear Algebra Services Package
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00041 
00042 #ifndef EPETRAEXT_BLOCKCRSMATRIX_H
00043 #define EPETRAEXT_BLOCKCRSMATRIX_H
00044 
00045 #include <vector>
00046 
00047 #include "Epetra_CrsMatrix.h" 
00048 
00050 
00057 namespace EpetraExt {
00058 
00059 class BlockCrsMatrix: public Epetra_CrsMatrix {
00060  public:
00061 
00063 
00064 
00073   BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const std::vector<int> & RowStencil, int RowIndex, const Epetra_Comm & GlobalComm );
00074   
00076 
00085   BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
00086 
00088   BlockCrsMatrix( const Epetra_CrsGraph & BaseGraph, const Epetra_CrsGraph& LocalBlockGraph, const Epetra_Comm & GlobalComm );
00089 
00090   BlockCrsMatrix( const Epetra_RowMatrix & BaseMatrix, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
00091   
00093   BlockCrsMatrix( const BlockCrsMatrix & Matrix );
00094 
00096   virtual ~BlockCrsMatrix();
00098   
00100   const std::vector<int> & Stencil( int i = 0 ) { return RowStencil_[i]; }
00101 
00103   int RowIndex( int i = 0 ) { return RowIndices_[i]; }
00104   
00107   void LoadBlock(const Epetra_RowMatrix & BaseMatrix, const int Row, const int Col);
00108 
00111   void SumIntoBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const int Row, const int Col);
00112 
00115   void SumIntoGlobalBlock(double alpha, const Epetra_RowMatrix & BaseMatrix, const int Row, const int Col);
00116 
00119   void BlockSumIntoGlobalValues(const int BaseRow, int NumIndices,
00120      double* Values, const int* Indices, const int Row, const int Col);
00121   void BlockReplaceGlobalValues(const int BaseRow, int NumIndices,
00122      double* Values, const int* Indices, const int Row, const int Col);
00123   void BlockExtractGlobalRowView(const int BaseRow, int& NumEntries, 
00124      double*& Values, const int Row, const int Col);
00125 
00126   void ExtractBlock(Epetra_CrsMatrix & BaseMatrix, const int Row, const int Col);
00127 
00128  protected:
00129 
00130   Epetra_CrsGraph BaseGraph_;
00131 
00132   std::vector< std::vector<int> > RowStencil_;
00133 
00134   std::vector<int> RowIndices_; 
00135 
00136   int ROffset_;
00137   int COffset_;
00138 
00139 };
00140 
00141 } //namespace EpetraExt
00142 
00143 #endif /* EPETRA_CRSMATRIX_H */
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