2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
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.
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.
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/>.
20 #include "ly-module.hh" // pulls in lily-guile.hh and guile-compatibility.hh
23 #include "std-string.hh"
26 If a variable is changed in SRC, then DEST doesn't see the
31 module_define_closure_func (void *closure,
36 SCM module = *static_cast<SCM *> (closure);
37 if (to_boolean (scm_variable_bound_p (val)))
38 scm_module_define (module, key, scm_variable_ref (val));
42 LY_DEFINE (ly_module_copy, "ly:module-copy",
43 2, 0, 0, (SCM dest, SCM src),
44 "Copy all bindings from module @var{src} into @var{dest}.")
46 #define FUNC_NAME __FUNCTION__
47 SCM_VALIDATE_MODULE (1, src);
48 scm_internal_hash_fold ((scm_t_hash_fold_fn) &module_define_closure_func,
49 static_cast<void *> (&dest),
50 SCM_EOL, SCM_MODULE_OBARRAY (src));
51 return SCM_UNSPECIFIED;
56 /* Lookup SYM, but don't give error when it is not defined.
57 N.B. this is only needed when running with Guile versions
58 prior to V2.0.3, when calls to ly_module_lookup can be replaced
59 with direct calls to the Guile API scm_module_variable in the
63 ly_module_lookup (SCM module, SCM sym)
65 #define FUNC_NAME __FUNCTION__
66 SCM_VALIDATE_MODULE (1, module);
69 Guile V2 onward has a scm_module_variable API module.
70 Guile V1.8.7 only has a (module-variable) REPL function and we
71 can't import this via Scm_variable since that needs
72 ly_module_lookup itself.
75 return scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F);
77 return scm_module_variable (module, sym);
82 /* Lookup SYM in a list of modules, which do not have to be related.
83 Return the first instance. */
84 LY_DEFINE (ly_modules_lookup, "ly:modules-lookup",
86 (SCM modules, SCM sym, SCM def),
87 "Look up @var{sym} in the list @var{modules},"
88 " returning the first occurence. If not found, return"
89 " @var{def} or @code{#f} if @var{def} isn't specified.")
91 for (SCM s = modules; scm_is_pair (s); s = scm_cdr (s))
93 SCM mod = scm_car (s);
94 SCM v = ly_module_lookup (mod, sym);
95 if (SCM_VARIABLEP (v) && !SCM_UNBNDP (SCM_VARIABLE_REF (v)))
96 return scm_variable_ref (v);
99 if (!SCM_UNBNDP (def))