Commit | Line | Data |
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c35738c1 | 1 | /* Copyright (C) 1998,2000,2001,2002, 2003 Free Software Foundation, Inc. |
1ffa265b | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
1ffa265b | 7 | * |
73be1d9e MV |
8 | * This library 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 GNU | |
11 | * Lesser General Public License for more details. | |
1ffa265b | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
6e8d25a6 | 17 | |
6e8d25a6 | 18 | |
1ffa265b MD |
19 | \f |
20 | ||
d02b98e9 MV |
21 | #include <stdarg.h> |
22 | ||
a0599745 | 23 | #include "libguile/_scm.h" |
1ffa265b | 24 | |
a0599745 | 25 | #include "libguile/eval.h" |
fb43bf74 | 26 | #include "libguile/smob.h" |
a0599745 | 27 | #include "libguile/procprop.h" |
152abe96 MD |
28 | #include "libguile/vectors.h" |
29 | #include "libguile/hashtab.h" | |
30 | #include "libguile/struct.h" | |
31 | #include "libguile/variable.h" | |
7f763132 | 32 | #include "libguile/fluids.h" |
d02b98e9 | 33 | #include "libguile/deprecation.h" |
1ffa265b | 34 | |
a0599745 | 35 | #include "libguile/modules.h" |
1ffa265b | 36 | |
86d31dfe | 37 | int scm_module_system_booted_p = 0; |
e3365c07 | 38 | |
92c2555f | 39 | scm_t_bits scm_module_tag; |
e3365c07 | 40 | |
1ffa265b MD |
41 | static SCM the_module; |
42 | ||
55000e5f MV |
43 | SCM_DEFINE (scm_current_module, "current-module", 0, 0, 0, |
44 | (), | |
45 | "Return the current module.") | |
46 | #define FUNC_NAME s_scm_current_module | |
1ffa265b | 47 | { |
55000e5f | 48 | return scm_fluid_ref (the_module); |
1ffa265b | 49 | } |
55000e5f | 50 | #undef FUNC_NAME |
1ffa265b | 51 | |
86d31dfe | 52 | static void scm_post_boot_init_modules (void); |
1ffa265b | 53 | |
55000e5f MV |
54 | SCM_DEFINE (scm_set_current_module, "set-current-module", 1, 0, 0, |
55 | (SCM module), | |
9401323e | 56 | "Set the current module to @var{module} and return\n" |
55000e5f MV |
57 | "the previous current module.") |
58 | #define FUNC_NAME s_scm_set_current_module | |
1ffa265b | 59 | { |
55000e5f MV |
60 | SCM old; |
61 | ||
86d31dfe MV |
62 | if (!scm_module_system_booted_p) |
63 | scm_post_boot_init_modules (); | |
64 | ||
65 | SCM_VALIDATE_MODULE (SCM_ARG1, module); | |
55000e5f MV |
66 | |
67 | old = scm_current_module (); | |
68 | scm_fluid_set_x (the_module, module); | |
69 | ||
1ffa265b MD |
70 | return old; |
71 | } | |
55000e5f | 72 | #undef FUNC_NAME |
1ffa265b | 73 | |
e3365c07 MD |
74 | SCM_DEFINE (scm_interaction_environment, "interaction-environment", 0, 0, 0, |
75 | (), | |
1e6808ea MG |
76 | "Return a specifier for the environment that contains\n" |
77 | "implementation--defined bindings, typically a superset of those\n" | |
78 | "listed in the report. The intent is that this procedure will\n" | |
79 | "return the environment in which the implementation would\n" | |
80 | "evaluate expressions dynamically typed by the user.") | |
e3365c07 MD |
81 | #define FUNC_NAME s_scm_interaction_environment |
82 | { | |
aa767bc5 | 83 | return scm_current_module (); |
e3365c07 MD |
84 | } |
85 | #undef FUNC_NAME | |
86 | ||
1ffa265b | 87 | SCM |
d02b98e9 MV |
88 | scm_c_call_with_current_module (SCM module, |
89 | SCM (*func)(void *), void *data) | |
1ffa265b | 90 | { |
d02b98e9 | 91 | return scm_c_with_fluid (the_module, module, func, data); |
1ffa265b MD |
92 | } |
93 | ||
06e80f59 HWN |
94 | |
95 | /* | |
96 | convert "A B C" to scheme list (A B C) | |
97 | */ | |
d02b98e9 MV |
98 | static SCM |
99 | convert_module_name (const char *name) | |
281004cc | 100 | { |
d02b98e9 MV |
101 | SCM list = SCM_EOL; |
102 | SCM *tail = &list; | |
281004cc | 103 | |
d02b98e9 MV |
104 | const char *ptr; |
105 | while (*name) | |
106 | { | |
107 | while (*name == ' ') | |
108 | name++; | |
109 | ptr = name; | |
110 | while (*ptr && *ptr != ' ') | |
111 | ptr++; | |
112 | if (ptr > name) | |
113 | { | |
114 | *tail = scm_cons (scm_mem2symbol (name, ptr-name), SCM_EOL); | |
115 | tail = SCM_CDRLOC (*tail); | |
116 | } | |
117 | name = ptr; | |
118 | } | |
119 | ||
120 | return list; | |
1ffa265b MD |
121 | } |
122 | ||
d02b98e9 MV |
123 | static SCM process_define_module_var; |
124 | static SCM process_use_modules_var; | |
125 | static SCM resolve_module_var; | |
126 | ||
9e57344b | 127 | SCM |
d02b98e9 | 128 | scm_c_resolve_module (const char *name) |
9e57344b | 129 | { |
d02b98e9 | 130 | return scm_resolve_module (convert_module_name (name)); |
9e57344b MV |
131 | } |
132 | ||
55000e5f | 133 | SCM |
d02b98e9 | 134 | scm_resolve_module (SCM name) |
55000e5f | 135 | { |
fdc28395 | 136 | return scm_call_1 (SCM_VARIABLE_REF (resolve_module_var), name); |
55000e5f MV |
137 | } |
138 | ||
139 | SCM | |
d02b98e9 MV |
140 | scm_c_define_module (const char *name, |
141 | void (*init)(void *), void *data) | |
55000e5f | 142 | { |
fdc28395 | 143 | SCM module = scm_call_1 (SCM_VARIABLE_REF (process_define_module_var), |
1afff620 | 144 | scm_list_1 (convert_module_name (name))); |
d02b98e9 MV |
145 | if (init) |
146 | scm_c_call_with_current_module (module, (SCM (*)(void*))init, data); | |
147 | return module; | |
55000e5f MV |
148 | } |
149 | ||
d02b98e9 MV |
150 | void |
151 | scm_c_use_module (const char *name) | |
90184345 | 152 | { |
fdc28395 | 153 | scm_call_1 (SCM_VARIABLE_REF (process_use_modules_var), |
b64f4200 | 154 | scm_list_1 (scm_list_1 (convert_module_name (name)))); |
90184345 MD |
155 | } |
156 | ||
d02b98e9 | 157 | static SCM module_export_x_var; |
281004cc | 158 | |
eb880cef | 159 | |
06e80f59 HWN |
160 | /* |
161 | TODO: should export this function? --hwn. | |
162 | */ | |
163 | static SCM | |
164 | scm_export (SCM module, SCM namelist) | |
165 | { | |
8c330007 MD |
166 | return scm_call_2 (SCM_VARIABLE_REF (module_export_x_var), |
167 | module, namelist); | |
06e80f59 HWN |
168 | } |
169 | ||
eb880cef MV |
170 | |
171 | /* | |
172 | @code{scm_c_export}(@var{name-list}) | |
173 | ||
174 | @code{scm_c_export} exports the named bindings from the current | |
175 | module, making them visible to users of the module. This function | |
176 | takes a list of string arguments, terminated by NULL, e.g. | |
177 | ||
178 | @example | |
179 | scm_c_export ("add-double-record", "bamboozle-money", NULL); | |
180 | @end example | |
181 | */ | |
d02b98e9 MV |
182 | void |
183 | scm_c_export (const char *name, ...) | |
281004cc | 184 | { |
eb880cef | 185 | if (name) |
d02b98e9 | 186 | { |
eb880cef MV |
187 | va_list ap; |
188 | SCM names = scm_cons (scm_str2symbol (name), SCM_EOL); | |
189 | SCM *tail = SCM_CDRLOC (names); | |
190 | va_start (ap, name); | |
191 | while (1) | |
192 | { | |
193 | const char *n = va_arg (ap, const char *); | |
194 | if (n == NULL) | |
195 | break; | |
196 | *tail = scm_cons (scm_str2symbol (n), SCM_EOL); | |
197 | tail = SCM_CDRLOC (*tail); | |
198 | } | |
199 | va_end (ap); | |
06e80f59 | 200 | scm_export (scm_current_module(), names); |
d02b98e9 | 201 | } |
281004cc MD |
202 | } |
203 | ||
06e80f59 | 204 | |
e3365c07 | 205 | /* Environments */ |
d164a5af MD |
206 | |
207 | SCM | |
6e8d25a6 | 208 | scm_top_level_env (SCM thunk) |
d164a5af MD |
209 | { |
210 | if (SCM_IMP (thunk)) | |
211 | return SCM_EOL; | |
212 | else | |
213 | return scm_cons (thunk, SCM_EOL); | |
214 | } | |
215 | ||
216 | SCM | |
217 | scm_env_top_level (SCM env) | |
218 | { | |
c88b1456 | 219 | while (SCM_CONSP (env)) |
d164a5af | 220 | { |
c88b1456 DH |
221 | SCM car_env = SCM_CAR (env); |
222 | if (!SCM_CONSP (car_env) && !SCM_FALSEP (scm_procedure_p (car_env))) | |
223 | return car_env; | |
d164a5af MD |
224 | env = SCM_CDR (env); |
225 | } | |
226 | return SCM_BOOL_F; | |
227 | } | |
228 | ||
86d31dfe MV |
229 | SCM_SYMBOL (sym_module, "module"); |
230 | ||
d02b98e9 MV |
231 | static SCM the_root_module_var; |
232 | ||
233 | static SCM | |
234 | the_root_module () | |
235 | { | |
236 | if (scm_module_system_booted_p) | |
237 | return SCM_VARIABLE_REF (the_root_module_var); | |
238 | else | |
239 | return SCM_BOOL_F; | |
240 | } | |
241 | ||
86d31dfe MV |
242 | SCM |
243 | scm_lookup_closure_module (SCM proc) | |
244 | { | |
245 | if (SCM_FALSEP (proc)) | |
d02b98e9 | 246 | return the_root_module (); |
86d31dfe MV |
247 | else if (SCM_EVAL_CLOSURE_P (proc)) |
248 | return SCM_PACK (SCM_SMOB_DATA (proc)); | |
249 | else | |
250 | { | |
251 | SCM mod = scm_procedure_property (proc, sym_module); | |
c88b1456 | 252 | if (SCM_FALSEP (mod)) |
d02b98e9 | 253 | mod = the_root_module (); |
86d31dfe MV |
254 | return mod; |
255 | } | |
256 | } | |
257 | ||
e24ca538 MV |
258 | SCM_DEFINE (scm_env_module, "env-module", 1, 0, 0, |
259 | (SCM env), | |
260 | "Return the module of @var{ENV}, a lexical environment.") | |
261 | #define FUNC_NAME s_scm_env_module | |
86d31dfe MV |
262 | { |
263 | return scm_lookup_closure_module (scm_env_top_level (env)); | |
264 | } | |
e24ca538 | 265 | #undef FUNC_NAME |
86d31dfe | 266 | |
152abe96 MD |
267 | /* |
268 | * C level implementation of the standard eval closure | |
269 | * | |
270 | * This increases loading speed substantially. | |
271 | * The code will be replaced by the low-level environments in next release. | |
272 | */ | |
273 | ||
86d31dfe | 274 | static SCM module_make_local_var_x_var; |
152abe96 MD |
275 | |
276 | static SCM | |
277 | module_variable (SCM module, SCM sym) | |
278 | { | |
dc187f33 | 279 | #define SCM_BOUND_THING_P(b) \ |
c88b1456 | 280 | (!SCM_FALSEP(b) && \ |
dc187f33 MV |
281 | (!SCM_VARIABLEP(b) || !SCM_UNBNDP (SCM_VARIABLE_REF (b)))) |
282 | ||
152abe96 | 283 | /* 1. Check module obarray */ |
e3365c07 | 284 | SCM b = scm_hashq_ref (SCM_MODULE_OBARRAY (module), sym, SCM_UNDEFINED); |
dc187f33 | 285 | if (SCM_BOUND_THING_P (b)) |
152abe96 MD |
286 | return b; |
287 | { | |
e3365c07 | 288 | SCM binder = SCM_MODULE_BINDER (module); |
c88b1456 | 289 | if (!SCM_FALSEP (binder)) |
152abe96 MD |
290 | /* 2. Custom binder */ |
291 | { | |
fdc28395 | 292 | b = scm_call_3 (binder, module, sym, SCM_BOOL_F); |
dc187f33 | 293 | if (SCM_BOUND_THING_P (b)) |
152abe96 MD |
294 | return b; |
295 | } | |
296 | } | |
297 | { | |
298 | /* 3. Search the use list */ | |
e3365c07 | 299 | SCM uses = SCM_MODULE_USES (module); |
152abe96 MD |
300 | while (SCM_CONSP (uses)) |
301 | { | |
302 | b = module_variable (SCM_CAR (uses), sym); | |
dc187f33 | 303 | if (SCM_BOUND_THING_P (b)) |
152abe96 MD |
304 | return b; |
305 | uses = SCM_CDR (uses); | |
306 | } | |
307 | return SCM_BOOL_F; | |
308 | } | |
dc187f33 | 309 | #undef SCM_BOUND_THING_P |
152abe96 MD |
310 | } |
311 | ||
92c2555f | 312 | scm_t_bits scm_tc16_eval_closure; |
152abe96 | 313 | |
86d31dfe MV |
314 | #define SCM_F_EVAL_CLOSURE_INTERFACE (1<<16) |
315 | #define SCM_EVAL_CLOSURE_INTERFACE_P(e) \ | |
316 | (SCM_CELL_WORD_0 (e) & SCM_F_EVAL_CLOSURE_INTERFACE) | |
317 | ||
fb43bf74 KN |
318 | /* NOTE: This function may be called by a smob application |
319 | or from another C function directly. */ | |
320 | SCM | |
321 | scm_eval_closure_lookup (SCM eclo, SCM sym, SCM definep) | |
152abe96 | 322 | { |
fb43bf74 | 323 | SCM module = SCM_PACK (SCM_SMOB_DATA (eclo)); |
c88b1456 | 324 | if (!SCM_FALSEP (definep)) |
86d31dfe MV |
325 | { |
326 | if (SCM_EVAL_CLOSURE_INTERFACE_P (eclo)) | |
327 | return SCM_BOOL_F; | |
fdc28395 KN |
328 | return scm_call_2 (SCM_VARIABLE_REF (module_make_local_var_x_var), |
329 | module, sym); | |
86d31dfe | 330 | } |
152abe96 MD |
331 | else |
332 | return module_variable (module, sym); | |
333 | } | |
334 | ||
335 | SCM_DEFINE (scm_standard_eval_closure, "standard-eval-closure", 1, 0, 0, | |
336 | (SCM module), | |
84526793 | 337 | "Return an eval closure for the module @var{module}.") |
152abe96 MD |
338 | #define FUNC_NAME s_scm_standard_eval_closure |
339 | { | |
e841c3e0 | 340 | SCM_RETURN_NEWSMOB (scm_tc16_eval_closure, SCM_UNPACK (module)); |
152abe96 MD |
341 | } |
342 | #undef FUNC_NAME | |
343 | ||
86d31dfe MV |
344 | SCM_DEFINE (scm_standard_interface_eval_closure, |
345 | "standard-interface-eval-closure", 1, 0, 0, | |
346 | (SCM module), | |
347 | "Return a interface eval closure for the module @var{module}. " | |
348 | "Such a closure does not allow new bindings to be added.") | |
349 | #define FUNC_NAME s_scm_standard_interface_eval_closure | |
350 | { | |
351 | SCM_RETURN_NEWSMOB (scm_tc16_eval_closure | SCM_F_EVAL_CLOSURE_INTERFACE, | |
352 | SCM_UNPACK (module)); | |
353 | } | |
354 | #undef FUNC_NAME | |
355 | ||
d02b98e9 MV |
356 | SCM |
357 | scm_module_lookup_closure (SCM module) | |
358 | { | |
c88b1456 | 359 | if (SCM_FALSEP (module)) |
d02b98e9 MV |
360 | return SCM_BOOL_F; |
361 | else | |
362 | return SCM_MODULE_EVAL_CLOSURE (module); | |
363 | } | |
364 | ||
365 | SCM | |
366 | scm_current_module_lookup_closure () | |
367 | { | |
368 | if (scm_module_system_booted_p) | |
369 | return scm_module_lookup_closure (scm_current_module ()); | |
370 | else | |
371 | return SCM_BOOL_F; | |
372 | } | |
373 | ||
374 | SCM | |
375 | scm_module_transformer (SCM module) | |
376 | { | |
c88b1456 | 377 | if (SCM_FALSEP (module)) |
d02b98e9 MV |
378 | return SCM_BOOL_F; |
379 | else | |
380 | return SCM_MODULE_TRANSFORMER (module); | |
381 | } | |
382 | ||
383 | SCM | |
384 | scm_current_module_transformer () | |
385 | { | |
386 | if (scm_module_system_booted_p) | |
387 | return scm_module_transformer (scm_current_module ()); | |
388 | else | |
389 | return SCM_BOOL_F; | |
390 | } | |
391 | ||
109c2c9f MD |
392 | SCM_DEFINE (scm_module_import_interface, "module-import-interface", 2, 0, 0, |
393 | (SCM module, SCM sym), | |
394 | "") | |
395 | #define FUNC_NAME s_scm_module_import_interface | |
396 | { | |
397 | #define SCM_BOUND_THING_P(b) (!SCM_FALSEP (b)) | |
398 | SCM_VALIDATE_MODULE (SCM_ARG1, module); | |
399 | /* Search the use list */ | |
400 | SCM uses = SCM_MODULE_USES (module); | |
401 | while (SCM_CONSP (uses)) | |
402 | { | |
403 | SCM interface = SCM_CAR (uses); | |
404 | /* 1. Check module obarray */ | |
405 | SCM b = scm_hashq_ref (SCM_MODULE_OBARRAY (interface), sym, SCM_BOOL_F); | |
406 | if (SCM_BOUND_THING_P (b)) | |
407 | return interface; | |
408 | { | |
409 | SCM binder = SCM_MODULE_BINDER (interface); | |
410 | if (!SCM_FALSEP (binder)) | |
411 | /* 2. Custom binder */ | |
412 | { | |
413 | b = scm_call_3 (binder, interface, sym, SCM_BOOL_F); | |
414 | if (SCM_BOUND_THING_P (b)) | |
415 | return interface; | |
416 | } | |
417 | } | |
418 | /* 3. Search use list recursively. */ | |
419 | interface = scm_module_import_interface (interface, sym); | |
420 | if (!SCM_FALSEP (interface)) | |
421 | return interface; | |
422 | uses = SCM_CDR (uses); | |
423 | } | |
424 | return SCM_BOOL_F; | |
425 | } | |
426 | #undef FUNC_NAME | |
427 | ||
86d31dfe MV |
428 | /* scm_sym2var |
429 | * | |
430 | * looks up the variable bound to SYM according to PROC. PROC should be | |
431 | * a `eval closure' of some module. | |
432 | * | |
433 | * When no binding exists, and DEFINEP is true, create a new binding | |
434 | * with a initial value of SCM_UNDEFINED. Return `#f' when DEFINEP as | |
435 | * false and no binding exists. | |
436 | * | |
437 | * When PROC is `#f', it is ignored and the binding is searched for in | |
438 | * the scm_pre_modules_obarray (a `eq' hash table). | |
439 | */ | |
440 | ||
441 | SCM scm_pre_modules_obarray; | |
442 | ||
443 | SCM | |
444 | scm_sym2var (SCM sym, SCM proc, SCM definep) | |
445 | #define FUNC_NAME "scm_sym2var" | |
446 | { | |
447 | SCM var; | |
448 | ||
449 | if (SCM_NIMP (proc)) | |
450 | { | |
451 | if (SCM_EVAL_CLOSURE_P (proc)) | |
452 | { | |
453 | /* Bypass evaluator in the standard case. */ | |
454 | var = scm_eval_closure_lookup (proc, sym, definep); | |
455 | } | |
456 | else | |
fdc28395 | 457 | var = scm_call_2 (proc, sym, definep); |
86d31dfe MV |
458 | } |
459 | else | |
460 | { | |
461 | SCM handle; | |
462 | ||
bcbd25b7 | 463 | if (SCM_FALSEP (definep)) |
86d31dfe MV |
464 | var = scm_hashq_ref (scm_pre_modules_obarray, sym, SCM_BOOL_F); |
465 | else | |
466 | { | |
467 | handle = scm_hashq_create_handle_x (scm_pre_modules_obarray, | |
468 | sym, SCM_BOOL_F); | |
469 | var = SCM_CDR (handle); | |
c88b1456 | 470 | if (SCM_FALSEP (var)) |
86d31dfe MV |
471 | { |
472 | var = scm_make_variable (SCM_UNDEFINED); | |
86d31dfe MV |
473 | SCM_SETCDR (handle, var); |
474 | } | |
475 | } | |
476 | } | |
477 | ||
c88b1456 | 478 | if (!SCM_FALSEP (var) && !SCM_VARIABLEP (var)) |
1afff620 | 479 | SCM_MISC_ERROR ("~S is not bound to a variable", scm_list_1 (sym)); |
86d31dfe MV |
480 | |
481 | return var; | |
482 | } | |
483 | #undef FUNC_NAME | |
484 | ||
485 | SCM | |
486 | scm_c_module_lookup (SCM module, const char *name) | |
487 | { | |
488 | return scm_module_lookup (module, scm_str2symbol (name)); | |
489 | } | |
490 | ||
491 | SCM | |
492 | scm_module_lookup (SCM module, SCM sym) | |
493 | #define FUNC_NAME "module-lookup" | |
494 | { | |
495 | SCM var; | |
496 | SCM_VALIDATE_MODULE (1, module); | |
497 | ||
498 | var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F); | |
499 | if (SCM_FALSEP (var)) | |
1afff620 | 500 | SCM_MISC_ERROR ("unbound variable: ~S", scm_list_1 (sym)); |
86d31dfe MV |
501 | return var; |
502 | } | |
503 | #undef FUNC_NAME | |
504 | ||
505 | SCM | |
506 | scm_c_lookup (const char *name) | |
507 | { | |
508 | return scm_lookup (scm_str2symbol (name)); | |
509 | } | |
510 | ||
511 | SCM | |
512 | scm_lookup (SCM sym) | |
513 | { | |
514 | SCM var = | |
515 | scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_F); | |
516 | if (SCM_FALSEP (var)) | |
1afff620 | 517 | scm_misc_error ("scm_lookup", "unbound variable: ~S", scm_list_1 (sym)); |
86d31dfe MV |
518 | return var; |
519 | } | |
520 | ||
521 | SCM | |
522 | scm_c_module_define (SCM module, const char *name, SCM value) | |
523 | { | |
524 | return scm_module_define (module, scm_str2symbol (name), value); | |
525 | } | |
526 | ||
527 | SCM | |
528 | scm_module_define (SCM module, SCM sym, SCM value) | |
529 | #define FUNC_NAME "module-define" | |
530 | { | |
531 | SCM var; | |
532 | SCM_VALIDATE_MODULE (1, module); | |
533 | ||
534 | var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_T); | |
535 | SCM_VARIABLE_SET (var, value); | |
536 | return var; | |
537 | } | |
538 | #undef FUNC_NAME | |
539 | ||
540 | SCM | |
541 | scm_c_define (const char *name, SCM value) | |
542 | { | |
543 | return scm_define (scm_str2symbol (name), value); | |
544 | } | |
545 | ||
546 | SCM | |
547 | scm_define (SCM sym, SCM value) | |
548 | { | |
549 | SCM var = | |
550 | scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_T); | |
551 | SCM_VARIABLE_SET (var, value); | |
552 | return var; | |
553 | } | |
554 | ||
555 | SCM | |
556 | scm_module_reverse_lookup (SCM module, SCM variable) | |
557 | #define FUNC_NAME "module-reverse-lookup" | |
558 | { | |
559 | SCM obarray; | |
c014a02e | 560 | long i, n; |
86d31dfe | 561 | |
c88b1456 | 562 | if (SCM_FALSEP (module)) |
86d31dfe MV |
563 | obarray = scm_pre_modules_obarray; |
564 | else | |
565 | { | |
566 | SCM_VALIDATE_MODULE (1, module); | |
567 | obarray = SCM_MODULE_OBARRAY (module); | |
568 | } | |
569 | ||
570 | /* XXX - We do not use scm_hash_fold here to avoid searching the | |
571 | whole obarray. We should have a scm_hash_find procedure. */ | |
572 | ||
c35738c1 | 573 | n = SCM_HASHTABLE_N_BUCKETS (obarray); |
86d31dfe MV |
574 | for (i = 0; i < n; ++i) |
575 | { | |
c35738c1 | 576 | SCM ls = SCM_HASHTABLE_BUCKETS (obarray)[i], handle; |
86d31dfe MV |
577 | while (!SCM_NULLP (ls)) |
578 | { | |
579 | handle = SCM_CAR (ls); | |
580 | if (SCM_CDR (handle) == variable) | |
581 | return SCM_CAR (handle); | |
582 | ls = SCM_CDR (ls); | |
583 | } | |
584 | } | |
585 | ||
586 | /* Try the `uses' list. | |
587 | */ | |
588 | { | |
589 | SCM uses = SCM_MODULE_USES (module); | |
590 | while (SCM_CONSP (uses)) | |
591 | { | |
592 | SCM sym = scm_module_reverse_lookup (SCM_CAR (uses), variable); | |
c88b1456 | 593 | if (!SCM_FALSEP (sym)) |
86d31dfe MV |
594 | return sym; |
595 | uses = SCM_CDR (uses); | |
596 | } | |
597 | } | |
598 | ||
599 | return SCM_BOOL_F; | |
600 | } | |
601 | #undef FUNC_NAME | |
602 | ||
603 | SCM_DEFINE (scm_get_pre_modules_obarray, "%get-pre-modules-obarray", 0, 0, 0, | |
604 | (), | |
605 | "Return the obarray that is used for all new bindings before " | |
606 | "the module system is booted. The first call to " | |
607 | "@code{set-current-module} will boot the module system.") | |
608 | #define FUNC_NAME s_scm_get_pre_modules_obarray | |
609 | { | |
610 | return scm_pre_modules_obarray; | |
611 | } | |
612 | #undef FUNC_NAME | |
613 | ||
d02b98e9 MV |
614 | SCM_SYMBOL (scm_sym_system_module, "system-module"); |
615 | ||
616 | SCM | |
617 | scm_system_module_env_p (SCM env) | |
618 | { | |
619 | SCM proc = scm_env_top_level (env); | |
620 | if (SCM_FALSEP (proc)) | |
621 | return SCM_BOOL_T; | |
c88b1456 | 622 | return ((!SCM_FALSEP (scm_procedure_property (proc, |
d02b98e9 MV |
623 | scm_sym_system_module))) |
624 | ? SCM_BOOL_T | |
625 | : SCM_BOOL_F); | |
626 | } | |
627 | ||
86d31dfe MV |
628 | void |
629 | scm_modules_prehistory () | |
630 | { | |
631 | scm_pre_modules_obarray | |
231a4ea8 | 632 | = scm_permanent_object (scm_c_make_hash_table (1533)); |
86d31dfe MV |
633 | } |
634 | ||
1ffa265b MD |
635 | void |
636 | scm_init_modules () | |
637 | { | |
a0599745 | 638 | #include "libguile/modules.x" |
86d31dfe MV |
639 | module_make_local_var_x_var = scm_c_define ("module-make-local-var!", |
640 | SCM_UNDEFINED); | |
e841c3e0 KN |
641 | scm_tc16_eval_closure = scm_make_smob_type ("eval-closure", 0); |
642 | scm_set_smob_mark (scm_tc16_eval_closure, scm_markcdr); | |
643 | scm_set_smob_apply (scm_tc16_eval_closure, scm_eval_closure_lookup, 2, 0, 0); | |
55000e5f MV |
644 | |
645 | the_module = scm_permanent_object (scm_make_fluid ()); | |
1ffa265b MD |
646 | } |
647 | ||
86d31dfe | 648 | static void |
1ffa265b MD |
649 | scm_post_boot_init_modules () |
650 | { | |
86d31dfe MV |
651 | #define PERM(x) scm_permanent_object(x) |
652 | ||
653 | SCM module_type = SCM_VARIABLE_REF (scm_c_lookup ("module-type")); | |
904a077d | 654 | scm_module_tag = (SCM_CELL_WORD_1 (module_type) + scm_tc3_struct); |
d02b98e9 MV |
655 | |
656 | resolve_module_var = PERM (scm_c_lookup ("resolve-module")); | |
657 | process_define_module_var = PERM (scm_c_lookup ("process-define-module")); | |
658 | process_use_modules_var = PERM (scm_c_lookup ("process-use-modules")); | |
659 | module_export_x_var = PERM (scm_c_lookup ("module-export!")); | |
660 | the_root_module_var = PERM (scm_c_lookup ("the-root-module")); | |
661 | ||
e3365c07 | 662 | scm_module_system_booted_p = 1; |
1ffa265b | 663 | } |
89e00824 ML |
664 | |
665 | /* | |
666 | Local Variables: | |
667 | c-file-style: "gnu" | |
668 | End: | |
669 | */ |