/*
- music-function.cc -- implement music_function
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2004--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.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-function.hh"
#include "music.hh"
+#include "ly-smobs.icc"
-static scm_t_bits music_function_tag;
+class Musicfunction
+{
+ DECLARE_SIMPLE_SMOBS (Musicfunction);
+ SCM signature_;
+ SCM function_;
+public:
+ Musicfunction (SCM signature, SCM function):
+ signature_ (signature), function_ (function) { }
+ SCM get_function () { return function_; }
+ SCM get_signature () { return signature_; }
+};
+
+IMPLEMENT_SIMPLE_SMOBS (Musicfunction);
+IMPLEMENT_DEFAULT_EQUAL_P (Musicfunction);
/* Print a textual represenation of the smob to a given port. */
-static int
-print_music_function (SCM b, SCM port, scm_print_state *)
+int
+Musicfunction::print_smob (SCM b, SCM port, scm_print_state *)
{
- SCM value = SCM_CELL_OBJECT_1 (b);
-
scm_puts ("#<Music function ", port);
- scm_write (value, port);
+ scm_write (Musicfunction::unsmob (b)->get_function (), port);
scm_puts (">", port);
/* Non-zero means success. */
return 1;
}
-LY_DEFINE (ly_make_music_function, "ly:make-music-function", 2, 0, 0,
- (SCM signature, SCM func),
- "Make a function to process music, to be used for the "
- "parser. @code{func} is the function, and @code{signature} describes "
- "Its arguments. @code{signature} is a list containing either "
- "@code{ly:music?} predicates or other type predicates.")
-{
- String str = "";
- for (SCM s = signature; scm_is_pair (s); s = scm_cdr (s))
- {
- if (str != "")
- str += "-";
-
- if (scm_car (s) == Music_type_p_proc)
- str += "music";
- else if (scm_car (s) == ly_lily_module_constant ("markup?"))
- str += "markup";
- else if (ly_is_procedure (scm_car (s)))
- str += "scm";
- }
- if (str == "") str = "noarg";
- scm_set_object_property_x (func, ly_symbol2scm ("music-function-signature"),
- signature);
-
- scm_set_object_property_x (func, ly_symbol2scm ("music-function-signature-keyword"),
- ly_symbol2scm (str.to_str0 ()));
-
- SCM_RETURN_NEWSMOB (music_function_tag, func);
-}
-
bool
is_music_function (SCM music_function)
{
- return (SCM_NIMP (music_function) && SCM_CELL_TYPE (music_function) == music_function_tag);
+ return Musicfunction::unsmob (music_function);
}
SCM
if (!is_music_function (music_function))
return SCM_UNDEFINED;
- return SCM_CELL_OBJECT_1 (music_function);
+ return Musicfunction::unsmob (music_function)->get_function ();
+}
+
+SCM
+make_music_function (SCM signature, SCM func)
+{
+ return Musicfunction (signature, func).smobbed_copy ();
}
-static void
-init_music_function (void)
+SCM
+get_music_function_signature (SCM music_function)
{
- music_function_tag = scm_make_smob_type ("music-function", 0);
- scm_set_smob_mark (music_function_tag, scm_markcdr);
- scm_set_smob_print (music_function_tag, print_music_function);
+ if (!is_music_function (music_function))
+ return SCM_UNDEFINED;
+
+ return Musicfunction::unsmob (music_function)->get_signature ();
}
-ADD_SCM_INIT_FUNC (music_function_tag, init_music_function);
+SCM
+Musicfunction::mark_smob (SCM s)
+{
+ Musicfunction *p = Musicfunction::unsmob (s);
+ scm_gc_mark (p->signature_);
+ ASSERT_LIVE_IS_ALLOWED (s);
+ return p->function_;
+}