inf.hh

// Copyright (C) 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_ACCU_MATH_INF_HH
# define MLN_ACCU_MATH_INF_HH


# include <mln/accu/internal/base.hh>
# include <mln/core/concept/meta_accumulator.hh>
# include <mln/trait/value_.hh>
# include <mln/util/pix.hh>
# include <mln/fun/math/inf.hh>

namespace mln
{

  namespace accu
  {

    namespace math
    {


      //
      template <typename T>
      struct inf : public mln::accu::internal::base< const T&, inf<T> >
      {
        typedef T argument;

        inf();

        void init();
        void take_as_init_(const argument& t);
        void take(const argument& t);
        void take(const inf<T>& other);

        const T& to_result() const;

        bool is_valid() const;

      protected:

        T t_;
        typename mln::fun::inf::with<T, T>::ret fun_;
      };


      template <typename I> struct inf< util::pix<I> >;

    } // end of mln::accu::math


    namespace meta
    {

      namespace math
      {


        struct inf : public Meta_Accumulator< inf >
        {
          template <typename T>
          struct with
          {
            typedef accu::math::inf<T> ret;
          };
        };

      } // end of namespace mln::accu::meta::math

    } // end of namespace mln::accu::meta


# ifndef MLN_INCLUDE_ONLY

    namespace math
    {

      template <typename T>
      inline
      inf<T>::inf()
      {
        init();
      }

      template <typename T>
      inline
      void
      inf<T>::init()
      {
        t_ = mln_max(T);
      }

      template <typename T>
      inline
      void inf<T>::take_as_init_(const argument& t)
      {
        t_ = t;
      }

      template <typename T>
      inline
      void inf<T>::take(const argument& t)
      {
        this->t_ = this->fun_(t_, t);
      }

      template <typename T>
      inline
      void
      inf<T>::take(const inf<T>& other)
      {
        this->t_ = this->fun_(t_, other.t_);
      }

      template <typename T>
      inline
      const T&
      inf<T>::to_result() const
      {
        return t_;
      }

      template <typename T>
      inline
      bool
      inf<T>::is_valid() const
      {
        return true;
      }

    } // end of namespace mln::accu::math

# endif // ! MLN_INCLUDE_ONLY

  } // end of namespace mln::accu

} // end of namespace mln


#endif // ! MLN_ACCU_MATH_INF_HH