TRUSTListElem.h

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#ifndef TRUSTListElem_included
#define TRUSTListElem_included
 
#include <assert.h>
#include <arch.h>
 
template<typename _TYPE_> class TRUSTList;
 
/*! @brief : Classe qui sert a representer une liste de reels int/double precision.
 *
 * On ne peut pas utiliser la classe container List avec des objets du type int/double car int/double est un type predefini du C++ qui ne possede pas les fonctions exigees par List< >.
 *
 */
template<typename _TYPE_>
class TRUSTListElem
{
public :
  friend class TRUSTList<_TYPE_>;
 
  TRUSTListElem() { suivant_ = this; } // Construit une liste vide.
  TRUSTListElem(const _TYPE_ x) : data(x), suivant_(0) { } // Construit le singleton (x).
  TRUSTListElem(const TRUSTListElem&);
  ~TRUSTListElem();
 
  inline int est_vide() const { return suivant_ == this; } // renvoie 1 si la liste est vide. 0 sinon
  inline int est_dernier() const { return ((est_vide()) || (suivant_ == 0)); } // renvoie 1 si il n'y a pas de suivant. 0 sinon
 
  inline _TYPE_& valeur() { return data; }
  inline _TYPE_ valeur() const { return data; }
 
  inline TRUSTListElem& add(_TYPE_ ) ;
  inline TRUSTListElem& suivant() { return *suivant_; }
  inline const TRUSTListElem& suivant() const { return *suivant_; }
 
  template<typename T>
  friend int operator ==(const TRUSTListElem<T>& , const TRUSTListElem<T>& );
 
protected:
  _TYPE_ data;
  TRUSTListElem* suivant_;
};
 
using IntListElem = TRUSTListElem<int>;
using DoubleListElem = TRUSTListElem<double>;
 
/*! @brief Constructeur par copie
 *
 * @param (const TRUSTListElem& list (la liste a copier))
 */
template<typename _TYPE_>
TRUSTListElem<_TYPE_>::TRUSTListElem(const TRUSTListElem<_TYPE_>& list)
{
  if (list.est_vide()) suivant_ = this;
  else
    {
      data = list.data;
      if (list.suivant_)
        {
          TRUSTListElem<_TYPE_> *next = new TRUSTListElem<_TYPE_>(*list.suivant_); //Recursif !!
          suivant_ = next;
        }
      else suivant_ = 0;
    }
}
 
template<typename _TYPE_>
TRUSTListElem<_TYPE_>::~TRUSTListElem()
{
  if (est_vide()) suivant_ = 0;
 
  if (suivant_)
    {
      // On ne garde pas la version delete suivant_ car sinon on est limite par le nombre d'appel recursif possible
      // delete suivant_;
      TRUSTListElem<_TYPE_> *poignee, *pr;
      pr = suivant_;
      suivant_ = 0;
      while (pr)
        {
          poignee = pr->suivant_;
          pr->suivant_ = 0;
          delete pr;
          pr = poignee;
        }
    }
}
 
/*! @brief insertion en queue
 *
 * @param (int/double value_to_add (element a ajouter))
 */
template<typename _TYPE_>
inline TRUSTListElem<_TYPE_>& TRUSTListElem<_TYPE_>::add(_TYPE_ value_to_add)
{
  assert(est_dernier());
  TRUSTListElem<_TYPE_> *next = new TRUSTListElem<_TYPE_>(value_to_add);
  suivant_ = next;
  return *this;
}
 
/*! @brief Operateur de comparaison de deux listes
 *
 * @return (1 si les listes sont egales, 0 sinon)
 */
template<typename _TYPE_>
int operator ==(const TRUSTListElem<_TYPE_>& list1 , const TRUSTListElem<_TYPE_>& list2)
{
  int retour = 1;
  if (list1.data != list2.data) retour = 0;
  if ((!list1.est_dernier()) && (list2.est_dernier())) retour = 0;
  if ((list1.est_dernier()) && (!list2.est_dernier())) retour = 0;
  if ((!list1.est_dernier()) && (!list2.est_dernier()))  retour = (*list1.suivant_ == *list2.suivant_);
  return retour;
}
 
#endif /* TRUSTListElem_included */