#ifndef SUMMATOR_H
#define SUMMATOR_H
/****************************************
*  Computer Algebra System SINGULAR     *
****************************************/
/* $Id$ */

// #include <summator.h> // for CPolynomialSummator class

#include <kernel/structs.h>
// #include <p_polys.h> // due to p_Copy :(


// //////////////////////////////////////////////////////////////////////// //
// CPolynomialSummator: unifies bucket and polynomial summation as the
// later is brocken in buckets :(
#ifdef HAVE_PLURAL
class CPolynomialSummator
{
  private:
    ring m_basering;
    bool m_bUsePolynomial;
    union
    {
      sBucket_pt m_bucket;
      poly       m_poly;
    } m_temp;
  public:
    CPolynomialSummator(ring rBaseRing, bool bUsePolynomial = false);
//    CPolynomialSummator(ring rBaseRing, poly pInitialSum, int iLength = 0, bool bUsePolynomial = false);
    ~CPolynomialSummator();

    // adds and destroes the summand
    void AddAndDelete(poly pSummand, int iLength);
    void AddAndDelete(poly pSummand);

    inline void operator +=(poly pSummand){ AddAndDelete(pSummand); }

    // only adds and keeps the summand
    // please use AddAndDelete instead!
    void Add(poly pSummand, int iLength);
    void Add(poly pSummand);

    // get the final result and clear (set to zero) the summator
    poly AddUpAndClear();
    poly AddUpAndClear(int *piLength);

    inline operator poly() { return AddUpAndClear(); }

    /// Copy constructor
    CPolynomialSummator(const CPolynomialSummator&);

  private:

    /// no assignment operator yet
    CPolynomialSummator& operator= (const CPolynomialSummator&);
};

#endif
#endif // ifndef  SUMMATOR_H