sparsityPattern.h

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// Gmsh - Copyright (C) 1997-2022 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file in the Gmsh root directory for license information.
// Please report all issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
 
#ifndef SPARSITY_PATTERN_H
#define SPARSITY_PATTERN_H
 
// this class has been optimized, please before changing anything, check twice :
// - the impact on the performance to assemble typical High Order FE problems
// - the impact on the memory for this operation
 
class sparsityPattern {
  int *_nByRow, *_nAllocByRow;
  int **_rowsj;
  int _nRows, _nRowsAlloc;
 
public:
  void insertEntry(int i, int j);
  const int *getRow(int line, int &size) const;
  void clear();
  sparsityPattern();
  ~sparsityPattern();
  inline int getNbRows() { return _nRows; }
};
 
#endif