EpetraExt_BlockAdjacencyGraph.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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// This library is free software; you can redistribute it and/or modify
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#ifndef EpetraExt_BLOCK_ADJACENCY_GRAPH_H
#define EpetraExt_BLOCK_ADJACENCY_GRAPH_H

class Epetra_CrsGraph;

#include <Teuchos_RCP.hpp>
#include <vector>

namespace EpetraExt {


int compare_ints(const void *a, const void *b);

class BlockAdjacencyGraph {

public:


  ~BlockAdjacencyGraph() {}


  BlockAdjacencyGraph() {}


   Teuchos::RCP<Epetra_CrsGraph> compute( Epetra_CrsGraph& B, int nbrr, std::vector<int>&r, std::vector<double>& weights, bool verbose = false);

private:

  // Some binary search tree helper functions.
  int* csr_bst( int n );
  int csr_bstrootindex( int n );

};

} //namespace EpetraExt

#endif //EpetraExt_BLOCK_ADJACENCY_GRAPH_H

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