load.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_IO_CLOUD_LOAD_HH
# define MLN_IO_CLOUD_LOAD_HH


# include <iostream>
# include <fstream>

# include <mln/core/concept/image.hh>
# include <mln/core/site_set/p_array.hh>

namespace mln
{

  namespace io
  {

    namespace cloud
    {

      template <typename P>
      void load(p_array<P>& arr, const std::string& filename);


# ifndef MLN_INCLUDE_ONLY

      namespace internal
      {

        template <typename P>
        inline
        void load_data(p_array<P>& arr, std::ifstream& file)
        {
          std::string line;
          while (std::getline(file, line))
          {
            algebra::vec<P::dim,float> v;
            std::istringstream sline(line);
            sline >> v[0] >> v[1] >> v[2];
            arr.append(v);
          }
        }

      } // end of namespace mln::io::cloud::internal



      template <typename P>
      void load(p_array<P>& arr, const std::string& filename)
      {
        trace::entering("mln::io::cloud::load");

        mln_precondition(P::dim == 3u);

        std::ifstream file(filename.c_str());
        if (! file)
        {
          std::cerr << "error: cannot open file '" << filename << "'!";
          abort();
        }

        internal::load_data(arr, file);

        trace::exiting("mln::io::cloud::load");
      }


# endif // ! MLN_INCLUDE_ONLY

    } // end of namespace mln::io::cloud

  } // end of namespace mln::io

} // end of namespace mln

#endif // ! MLN_IO_CLOUD_LOAD_HH