get_header.hh

// Copyright (C) 2010 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_DUMP_GET_HEADER_HH
# define MLN_IO_DUMP_GET_HEADER_HH


# include <iostream>
# include <fstream>

# include <mln/core/concept/image.hh>
# include <mln/core/routine/initialize.hh>
# include <mln/core/box_runstart_piter.hh>
# include <mln/core/pixel.hh>
# include <mln/data/memcpy_.hh>
# include <mln/util/array.hh>

namespace mln
{

  namespace io
  {

    namespace dump
    {

      struct dump_header
      {
        unsigned dim;
        std::string value_type;
        util::array<unsigned> size;
      };


      dump_header get_header(const std::string& filename);


# ifndef MLN_INCLUDE_ONLY


      dump_header get_header(const std::string& filename)
      {
        trace::entering("mln::io::dump::get_header");

        dump_header header;

        std::ifstream file(filename.c_str());
        if (! file)
        {
          std::cerr << "io::dump::get_header - Error: cannot open file '"
                    << filename << "'!"
                    << std::endl;
          abort();
        }


        // Milena's file type ?
        std::string file_type;
        file >> file_type;
        if (file_type != "milena/dump")
        {
          std::cerr << "io::dump::load - Error: invalid file type. '"
                    << filename
                    << "' is NOT a valid milena/dump file!"
                    << std::endl;
          abort();
        }

        // Dimension
        file >> header.dim;

        // Size information - Skip it, useless.
        header.size.resize(header.dim);
        for (unsigned i = 0; i < header.dim; ++i)
          file >> header.size[i];

        // Skipping endline.
        char c;
        file.get(c);

        // Value type name ?
        // WARNING: value type name limited to 255 characters...
        char value_type[255];
        file.getline(value_type, 255);
        header.value_type = value_type;

        trace::exiting("mln::io::dump::get_header");
        return header;
      }


# endif // ! MLN_INCLUDE_ONLY

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

  } // end of namespace mln::io

} // end of namespace mln

#endif // ! MLN_IO_DUMP_GET_HEADER_HH