## Copyright (C) 2013 Marco Vassallo <gedeone-octave@users.sourceforge.net>
##
## 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 3 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/>.

## -*- texinfo -*-
## @deftypefn {Function File} {} = import_ufl_Functional (@var{myproblem})
## Import a Functional from a ufl file.
##
## @var{myproblem} is the name of the ufl file where 
## the Functional is defined. This function creates in the pwd a file
## called @var{myproblem_Functional.oct}.
##
## @seealso{import_ufl_Problem, FunctionSpace, BilinearForm, LinearForm,
## Functional} 
## @end deftypefn
function import_ufl_Functional (var_prob)

  if nargin != 1
    error ("import_ufl_Functional: wrong number of input parameters.");
  elseif ! ischar (var_prob)
    error ("import_ufl_Functional: first argument is not a valid string");
  endif

  if (check_hash (var_prob) || ! check_oct_files (var_prob, "Functional"))
    n = length (mfilename ("fullpath")) - length (mfilename());
    path = strtrunc(mfilename ("fullpath"), n);

    private = fullfile (path, "include/");
    output = generate_fun (var_prob);
    output += generate_makefile (var_prob, private);
    if output != 0
      error ("Compilation failed");
    else
      [output, textfile] = system (sprintf ("make -f Makefile_%s fun", var_prob));
      if output != 0
        display (text);
        error ("Compilation failed");
      endif
      [output, textfile] = system (sprintf ("make -f Makefile_%s clean", var_prob));
      if output != 0
        display (text);
        error ("Compilation failed");
      endif
      save_hash (var_prob);
    endif
  endif
endfunction