/*
- music-wrapper.cc -- implement Music_wrapper
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1998--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ LilyPond 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.
+
+ LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "music-wrapper.hh"
SCM
Music_wrapper::start_callback (SCM m)
{
- Music *me = unsmob_music (m);
- Music *elt = unsmob_music (me->get_property ("element"));
- return elt->start_mom ().smobbed_copy ();
+ Music *me = unsmob<Music> (m);
+ Music *elt = unsmob<Music> (me->get_property ("element"));
+ if (elt)
+ return elt->start_mom ().smobbed_copy ();
+ else
+ return Moment ().smobbed_copy ();
}
MAKE_SCHEME_CALLBACK (Music_wrapper, length_callback, 1);
SCM
Music_wrapper::length_callback (SCM m)
{
- Music *me = unsmob_music (m);
- Music *elt = unsmob_music (me->get_property ("element"));
- return elt->get_length ().smobbed_copy ();
+ Music *me = unsmob<Music> (m);
+ Music *elt = unsmob<Music> (me->get_property ("element"));
+ if (elt)
+ return elt->get_length ().smobbed_copy ();
+ else
+ return Moment (0).smobbed_copy ();
}