1 /* Copyright (C) 1998 Free Software Foundation, Inc.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2, or (at your option)
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this software; see the file COPYING. If not, write to
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
43 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
54 static SCM the_root_module
;
55 static SCM root_module_lookup_closure
;
58 scm_the_root_module ()
60 return SCM_CDR (the_root_module
);
63 static SCM the_module
;
66 scm_selected_module ()
68 return SCM_CDR (the_module
);
71 static SCM set_current_module
;
74 scm_select_module (SCM module
)
76 SCM old
= scm_selected_module ();
77 scm_apply (SCM_CDR (set_current_module
), SCM_LIST1 (module
), SCM_EOL
);
81 SCM_SYMBOL (scm_sym_app
, "app");
82 SCM_SYMBOL (scm_sym_modules
, "modules");
83 static SCM module_prefix
;
86 scm_module_full_name (SCM name
)
88 if (SCM_CAR (name
) == scm_sym_app
)
91 return scm_append (SCM_LIST2 (module_prefix
, name
));
94 static SCM make_modules_in
;
95 static SCM beautify_user_module_x
;
98 scm_make_module (SCM name
)
100 return scm_apply (SCM_CDR (make_modules_in
),
101 SCM_LIST2 (scm_the_root_module (),
102 scm_module_full_name (name
)),
107 scm_ensure_user_module (SCM module
)
109 scm_apply (SCM_CDR (beautify_user_module_x
), SCM_LIST1 (module
), SCM_EOL
);
110 return SCM_UNSPECIFIED
;
113 static SCM module_eval_closure
;
116 scm_module_lookup_closure (SCM module
)
118 return scm_apply (SCM_CDR (module_eval_closure
),
123 static SCM resolve_module
;
126 scm_resolve_module (SCM name
)
128 return scm_apply (SCM_CDR (resolve_module
), SCM_LIST1 (name
), SCM_EOL
);
131 static SCM try_module_autoload
;
134 scm_load_scheme_module (SCM name
)
136 return scm_apply (SCM_CDR (try_module_autoload
), SCM_LIST1 (name
), SCM_EOL
);
143 scm_top_level_env (SCM thunk
)
148 return scm_cons (thunk
, SCM_EOL
);
152 scm_env_top_level (SCM env
)
154 while (SCM_NIMP (env
))
156 if (!SCM_CONSP (SCM_CAR (env
))
157 && SCM_NFALSEP (scm_procedure_p (SCM_CAR (env
))))
165 SCM_SYMBOL (scm_sym_system_module
, "system-module");
168 scm_system_module_env_p (SCM env
)
170 SCM proc
= scm_env_top_level (env
);
171 if (SCM_FALSEP (proc
))
172 proc
= root_module_lookup_closure
;
173 return ((SCM_NFALSEP (scm_procedure_property (proc
,
174 scm_sym_system_module
)))
186 scm_post_boot_init_modules ()
188 the_root_module
= scm_intern0 ("the-root-module");
189 the_module
= scm_intern0 ("the-module");
190 set_current_module
= scm_intern0 ("set-current-module");
191 module_prefix
= scm_permanent_object (SCM_LIST2 (scm_sym_app
,
193 make_modules_in
= scm_intern0 ("make-modules-in");
194 beautify_user_module_x
= scm_intern0 ("beautify-user-module!");
195 module_eval_closure
= scm_intern0 ("module-eval-closure");
196 root_module_lookup_closure
= scm_permanent_object
197 (scm_module_lookup_closure (SCM_CDR (the_root_module
)));
198 resolve_module
= scm_intern0 ("resolve-module");
199 try_module_autoload
= scm_intern0 ("try-module-autoload");