norm.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_FUN_V2W_W2V_NORM_HH
# define MLN_FUN_V2W_W2V_NORM_HH


# include <mln/core/concept/function.hh>
# include <mln/trait/value_.hh>

# include <mln/norm/all.hh>


namespace mln
{

  namespace fun
  {

    namespace v2w_w2v
    {

      template <typename V, typename R>
      struct l1_norm : public Function_v2v< l1_norm<V, R> >
      {
        typedef R result;
        R operator()(const V& v) const;
        V f_1(const V& v, const R& r) const;
      };

      template <typename V, typename R>
      struct l2_norm : public Function_v2v< l2_norm<V, R> >
      {
        typedef R result;
        R operator()(const V& v) const;
        V f_1(const V& v, const R& r) const;
      };

      template <typename V, typename R>
      struct linfty_norm : public Function_v2v< linfty_norm<V, R> >
      {
        typedef R result;
        R operator()(const V& v) const;
        V f_1(const V& v, const R& r) const;
      };


# ifndef MLN_INCLUDE_ONLY

      template <typename V, typename R>
      inline
      R
      l1_norm<V, R>::operator()(const V& v) const
      {
        return mln::norm::l1 (v);
      }

      template <typename V, typename R>
      inline
      V
      l1_norm<V, R>::f_1(const V& v, const R& r) const
      {
        return v / mln::norm::l1 (v) * r;
      }

      template <typename V, typename R>
      inline
      R
      l2_norm<V, R>::operator()(const V& v) const
      {
        return mln::norm::l2 (v);
      }

      template <typename V, typename R>
      inline
      V
      l2_norm<V, R>::f_1(const V& v, const R& r) const
      {
        return v / mln::norm::l2 (v) * r;
      }

      template <typename V, typename R>
      inline
      R
      linfty_norm<V, R>::operator()(const V& v) const
      {
        return mln::norm::linfty (v);
      }

      template <typename V, typename R>
      inline
      V
      linfty_norm<V, R>::f_1(const V& v, const R& r) const
      {
        return v / mln::norm::linfty (v) * r;
      }

# endif // ! MLN_INCLUDE_ONLY

    } // end of namespace mln::fun::v2w_w2v

  } // end of namespace mln::fun

} // end of namespace mln


#endif // ! MLN_FUN_V2W_W2V_NORM_HH