dpsites_piter.hh

// Copyright (C) 2007, 2008, 2009 EPITA Research and Development
// Laboratory (LRDE)
//
// This file is part of Olena.
//
// Olena is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation, version 2 of the License.
//
// Olena is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free
// software project without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to produce
// an executable, this file does not by itself cause the resulting
// executable to be covered by the GNU General Public License.  This
// exception does not however invalidate any other reasons why the
// executable file might be covered by the GNU General Public License.

#ifndef MLN_CORE_DPSITES_PITER_HH
# define MLN_CORE_DPSITES_PITER_HH


# include <vector>
# include <mln/core/internal/site_relative_iterator_base.hh>


namespace mln
{

  template <typename V>
  class dpsites_fwd_piter
    : public internal::site_relative_iterator_base< V, dpsites_fwd_piter<V> >
  {
  public:

    template <typename P>
    dpsites_fwd_piter(const V& v, const P& c);

    template <typename P>
    void init_(const V& v, const P& c);

    dpsites_fwd_piter();

    bool is_valid_() const;

    void invalidate_();

    void do_start_();

    void do_next_();

    mln_psite(V) compute_p_() const;

  protected:

    unsigned i_;
  };


  template <typename V>
  class dpsites_bkd_piter :
    public internal::site_relative_iterator_base< V, dpsites_bkd_piter<V> >
  {
  public:

    template <typename P>
    dpsites_bkd_piter(const V& v, const P& c);

    dpsites_bkd_piter();

    template <typename P>
    void init_(const V& v, const P& c);

    bool is_valid_() const;

    void invalidate_();

    void do_start_();

    void do_next_();

    mln_psite(V) compute_p_() const;

  protected:

    int i_;
  };



# ifndef MLN_INCLUDE_ONLY


  // Forward.

  template <typename V>
  inline
  dpsites_fwd_piter<V>::dpsites_fwd_piter()
  {
  }

  template <typename V>
  template <typename P>
  inline
  dpsites_fwd_piter<V>::dpsites_fwd_piter(const V& v, const P& c)
  {
    init_(v, c);
  }

  template <typename V>
  template <typename P>
  inline
  void
  dpsites_fwd_piter<V>::init_(const V& v, const P& c)
  {
    this->change_target(v);
    this->center_at(c);
  }


  template <typename V>
  inline
  bool
  dpsites_fwd_piter<V>::is_valid_() const
  {
    return i_ != this->s_->std_vector().size();
  }

  template <typename V>
  inline
  void
  dpsites_fwd_piter<V>::invalidate_()
  {
    i_ = this->s_->std_vector().size();
  }

  template <typename V>
  inline
  void
  dpsites_fwd_piter<V>::do_start_()
  {
    i_ = 0;
  }

  template <typename V>
  inline
  void
  dpsites_fwd_piter<V>::do_next_()
  {
    ++i_;
  }

  template <typename V>
  inline
  mln_psite(V)
  dpsites_fwd_piter<V>::compute_p_() const
  {
    return *this->c_ + this->s_->std_vector()[i_];
  }


  // Backward.

  template <typename V>
  inline
  dpsites_bkd_piter<V>::dpsites_bkd_piter()
  {
  }

  template <typename V>
  template <typename P>
  inline
  dpsites_bkd_piter<V>::dpsites_bkd_piter(const V& v, const P& c)
  {
    init_(v, c);
  }

  template <typename V>
  template <typename P>
  inline
  void
  dpsites_bkd_piter<V>::init_(const V& v, const P& c)
  {
    this->change_target(v);
    this->center_at(c);
  }


  template <typename V>
  inline
  bool
  dpsites_bkd_piter<V>::is_valid_() const
  {
    return i_ != -1;
  }

  template <typename V>
  inline
  void
  dpsites_bkd_piter<V>::invalidate_()
  {
    i_ = -1;
  }

  template <typename V>
  inline
  void
  dpsites_bkd_piter<V>::do_start_()
  {
    i_ = this->s_->std_vector().size() - 1;
  }

  template <typename V>
  inline
  void
  dpsites_bkd_piter<V>::do_next_()
  {
    --i_;
  }

  template <typename V>
  inline
  mln_psite(V)
  dpsites_bkd_piter<V>::compute_p_() const
  {
    return *this->c_ + this->s_->std_vector()[i_];
  }

# endif // ! MLN_INCLUDE_ONLY

} // end of namespace mln


#endif // ! MLN_CORE_DPSITES_PITER_HH