lily/relative-octave-check.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "input.hh"
  21 #include "international.hh"
  22 #include "music.hh"
  23
  24 class Relative_octave_check
  25 {
  26 public:
  27   DECLARE_SCHEME_CALLBACK (relative_callback, (SCM, SCM));
  28 };
  29
  30 MAKE_SCHEME_CALLBACK (Relative_octave_check, relative_callback, 2)
  31   SCM
  32 Relative_octave_check::relative_callback (SCM music, SCM last_pitch)
  33 {
  34   Pitch p = *unsmob_pitch (last_pitch);
  35   Music *m = unsmob_music (music);
  36   Pitch *check_p = unsmob_pitch (m->get_property ("pitch"));
  37
  38   int delta_oct = 0;
  39   if (check_p)
  40     {
  41       Pitch no_octave (-1,
  42                        check_p->get_notename (),
  43                        check_p->get_alteration ());
  44
  45       Pitch result = no_octave.to_relative_octave (p);
  46
  47       if (result != *check_p)
  48         {
  49           string s = _ ("Failed octave check, got: ");
  50           s += result.to_string ();
  51
  52           m->origin ()->warning (s);
  53
  54           delta_oct = check_p->get_octave () - result.get_octave ();
  55         }
  56     }
  57
  58   return Pitch (p.get_octave () + delta_oct,
  59                 p.get_notename (),
  60                 p.get_alteration ()).smobbed_copy ();
  61 }