/*
 Copyright (C) 2013 Marco Vassallo

 This program 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; either version 2 of the License, or (at your option) any later
 version.

 This program 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
 this program; if not, see <http://www.gnu.org/licenses/>.
*/

#include "mesh.h"

DEFUN_DLD (fem_init_mesh, args, , "initialize a mesh from (p, e, t) or file")
{
  int nargin = args.length ();
  octave_value retval = 0;

  if (nargin < 1 || nargin > 1)
    print_usage ();
  else
    {
      if (!error_state)
        {
          if (args(0).is_string () == true)
            {
              std::string filename = args(0).string_value ();
              //if the filename is not valid, dolfin takes care of it
              retval = new mesh (filename);
            }

           else
             {
               octave_scalar_map a = args(0).scalar_map_value ();
               Array<double> p = a.contents ("p").matrix_value ();
               Array<octave_idx_type> t = a.contents ("t").matrix_value ();
               Array<octave_idx_type> e = a.contents ("e").matrix_value ();

               if (! error_state)
                 {
                   retval = new mesh (p, e, t);
                 }
               else
                 error ("fem_init_mesh: the argument you provide is invalid");
             }
        }
    }
  return retval;
}