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1ffa265b MD |
1 | /* Copyright (C) 1998 Free Software Foundation, Inc. |
2 | * | |
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) | |
6 | * any later version. | |
7 | * | |
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. | |
12 | * | |
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 | |
17 | * | |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
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. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
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. | |
37 | * | |
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. */ | |
6e8d25a6 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
1ffa265b MD |
45 | \f |
46 | ||
47 | #include "_scm.h" | |
48 | ||
49 | #include "eval.h" | |
d164a5af | 50 | #include "procprop.h" |
1ffa265b MD |
51 | |
52 | #include "modules.h" | |
53 | ||
281004cc | 54 | static SCM the_root_module; |
d164a5af | 55 | static SCM root_module_lookup_closure; |
281004cc MD |
56 | |
57 | SCM | |
58 | scm_the_root_module () | |
59 | { | |
60 | return SCM_CDR (the_root_module); | |
61 | } | |
62 | ||
1ffa265b MD |
63 | static SCM the_module; |
64 | ||
65 | SCM | |
66 | scm_selected_module () | |
67 | { | |
68 | return SCM_CDR (the_module); | |
69 | } | |
70 | ||
71 | static SCM set_current_module; | |
72 | ||
73 | SCM | |
74 | scm_select_module (SCM module) | |
75 | { | |
76 | SCM old = scm_selected_module (); | |
77 | scm_apply (SCM_CDR (set_current_module), SCM_LIST1 (module), SCM_EOL); | |
78 | return old; | |
79 | } | |
80 | ||
81 | SCM_SYMBOL (scm_sym_app, "app"); | |
82 | SCM_SYMBOL (scm_sym_modules, "modules"); | |
83 | static SCM module_prefix; | |
84 | ||
85 | static SCM | |
86 | scm_module_full_name (SCM name) | |
87 | { | |
88 | if (SCM_CAR (name) == scm_sym_app) | |
89 | return name; | |
90 | else | |
91 | return scm_append (SCM_LIST2 (module_prefix, name)); | |
92 | } | |
93 | ||
94 | static SCM make_modules_in; | |
281004cc | 95 | static SCM beautify_user_module_x; |
1ffa265b MD |
96 | |
97 | SCM | |
98 | scm_make_module (SCM name) | |
99 | { | |
100 | return scm_apply (SCM_CDR (make_modules_in), | |
281004cc | 101 | SCM_LIST2 (scm_the_root_module (), |
1ffa265b MD |
102 | scm_module_full_name (name)), |
103 | SCM_EOL); | |
104 | } | |
105 | ||
281004cc MD |
106 | SCM |
107 | scm_ensure_user_module (SCM module) | |
108 | { | |
109 | scm_apply (SCM_CDR (beautify_user_module_x), SCM_LIST1 (module), SCM_EOL); | |
110 | return SCM_UNSPECIFIED; | |
111 | } | |
112 | ||
1ffa265b MD |
113 | static SCM module_eval_closure; |
114 | ||
115 | SCM | |
116 | scm_module_lookup_closure (SCM module) | |
117 | { | |
118 | return scm_apply (SCM_CDR (module_eval_closure), | |
119 | SCM_LIST1 (module), | |
120 | SCM_EOL); | |
121 | } | |
122 | ||
90184345 MD |
123 | static SCM resolve_module; |
124 | ||
125 | SCM | |
126 | scm_resolve_module (SCM name) | |
127 | { | |
128 | return scm_apply (SCM_CDR (resolve_module), SCM_LIST1 (name), SCM_EOL); | |
129 | } | |
130 | ||
281004cc MD |
131 | static SCM try_module_autoload; |
132 | ||
133 | SCM | |
134 | scm_load_scheme_module (SCM name) | |
135 | { | |
136 | return scm_apply (SCM_CDR (try_module_autoload), SCM_LIST1 (name), SCM_EOL); | |
137 | } | |
138 | ||
d164a5af MD |
139 | /* Environments |
140 | */ | |
141 | ||
142 | SCM | |
6e8d25a6 | 143 | scm_top_level_env (SCM thunk) |
d164a5af MD |
144 | { |
145 | if (SCM_IMP (thunk)) | |
146 | return SCM_EOL; | |
147 | else | |
148 | return scm_cons (thunk, SCM_EOL); | |
149 | } | |
150 | ||
151 | SCM | |
152 | scm_env_top_level (SCM env) | |
153 | { | |
154 | while (SCM_NIMP (env)) | |
155 | { | |
156 | if (!SCM_CONSP (SCM_CAR (env)) | |
157 | && SCM_NFALSEP (scm_procedure_p (SCM_CAR (env)))) | |
158 | return SCM_CAR(env); | |
159 | env = SCM_CDR (env); | |
160 | } | |
161 | return SCM_BOOL_F; | |
162 | } | |
163 | ||
164 | ||
165 | SCM_SYMBOL (scm_sym_system_module, "system-module"); | |
166 | ||
167 | SCM | |
168 | scm_system_module_env_p (SCM env) | |
169 | { | |
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))) | |
175 | ? SCM_BOOL_T | |
176 | : SCM_BOOL_F); | |
177 | } | |
178 | ||
1ffa265b MD |
179 | void |
180 | scm_init_modules () | |
181 | { | |
182 | #include "modules.x" | |
183 | } | |
184 | ||
185 | void | |
186 | scm_post_boot_init_modules () | |
187 | { | |
281004cc | 188 | the_root_module = scm_intern0 ("the-root-module"); |
1ffa265b MD |
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, | |
192 | scm_sym_modules)); | |
193 | make_modules_in = scm_intern0 ("make-modules-in"); | |
281004cc | 194 | beautify_user_module_x = scm_intern0 ("beautify-user-module!"); |
1ffa265b | 195 | module_eval_closure = scm_intern0 ("module-eval-closure"); |
d164a5af MD |
196 | root_module_lookup_closure = scm_permanent_object |
197 | (scm_module_lookup_closure (SCM_CDR (the_root_module))); | |
90184345 | 198 | resolve_module = scm_intern0 ("resolve-module"); |
281004cc | 199 | try_module_autoload = scm_intern0 ("try-module-autoload"); |
1ffa265b | 200 | } |