DerivStencil.H

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//
// This software is copyright (C) by the Lawrence Berkeley
// National Laboratory.  Permission is granted to reproduce
// this software for non-commercial purposes provided that
// this notice is left intact.
// 
// It is acknowledged that the U.S. Government has rights to
// this software under Contract DE-AC03-765F00098 between
// the U.S.  Department of Energy and the University of
// California.
//
// This software is provided as a professional and academic
// contribution for joint exchange. Thus it is experimental,
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#ifndef _Deriv_Stencil_H_
#define _Deriv_Stencil_H_

#include <iostream>
#include <math.h>
#include <assert.h>
#include <stdlib.h>
#include "REAL.H"
#include "IntVect.H"
#include "Vector.H"


class DerivStencil
{
public:
  void define();


  bool isDefined() const
  {return isdefined;}


  DerivStencil();


  DerivStencil(const DerivStencil& a_dsin);

  ~DerivStencil();


  void clear();


  int size() const;


  const IntVect& getIndex(int a_ivec) const;


  const Real& getWeight(int a_ivec) const;


  void accumulate(const IntVect& a_iv,  Real a_weight);


  const DerivStencil& operator=(const DerivStencil& a_dsin);


  const DerivStencil& operator*=(Real a_facin);


  const DerivStencil& operator/=(Real a_denom);


  const DerivStencil& operator+=(Real a_facin);


  const DerivStencil& operator-=(Real a_facin);

protected:
  Vector<IntVect> m_vectIV;
  Vector<Real>          m_vectWgt;
  bool isdefined;
};



#endif

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