Commit | Line | Data |
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608860a5 LC |
1 | /* Copyright (C) 1998,2000,2001,2002,2003,2004,2006,2007 Free Software Foundation, Inc. |
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 | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 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 | ||
cb1cfc42 | 94 | void |
661ae7ab | 95 | scm_dynwind_current_module (SCM module) |
cb1cfc42 | 96 | { |
661ae7ab | 97 | scm_dynwind_fluid (the_module, module); |
cb1cfc42 | 98 | } |
06e80f59 HWN |
99 | |
100 | /* | |
101 | convert "A B C" to scheme list (A B C) | |
102 | */ | |
d02b98e9 MV |
103 | static SCM |
104 | convert_module_name (const char *name) | |
281004cc | 105 | { |
d02b98e9 MV |
106 | SCM list = SCM_EOL; |
107 | SCM *tail = &list; | |
281004cc | 108 | |
d02b98e9 MV |
109 | const char *ptr; |
110 | while (*name) | |
111 | { | |
112 | while (*name == ' ') | |
113 | name++; | |
114 | ptr = name; | |
115 | while (*ptr && *ptr != ' ') | |
116 | ptr++; | |
117 | if (ptr > name) | |
118 | { | |
cc95e00a MV |
119 | SCM sym = scm_from_locale_symboln (name, ptr-name); |
120 | *tail = scm_cons (sym, SCM_EOL); | |
d02b98e9 MV |
121 | tail = SCM_CDRLOC (*tail); |
122 | } | |
123 | name = ptr; | |
124 | } | |
125 | ||
126 | return list; | |
1ffa265b MD |
127 | } |
128 | ||
d02b98e9 MV |
129 | static SCM process_define_module_var; |
130 | static SCM process_use_modules_var; | |
131 | static SCM resolve_module_var; | |
132 | ||
9e57344b | 133 | SCM |
d02b98e9 | 134 | scm_c_resolve_module (const char *name) |
9e57344b | 135 | { |
d02b98e9 | 136 | return scm_resolve_module (convert_module_name (name)); |
9e57344b MV |
137 | } |
138 | ||
55000e5f | 139 | SCM |
d02b98e9 | 140 | scm_resolve_module (SCM name) |
55000e5f | 141 | { |
fdc28395 | 142 | return scm_call_1 (SCM_VARIABLE_REF (resolve_module_var), name); |
55000e5f MV |
143 | } |
144 | ||
145 | SCM | |
d02b98e9 MV |
146 | scm_c_define_module (const char *name, |
147 | void (*init)(void *), void *data) | |
55000e5f | 148 | { |
fdc28395 | 149 | SCM module = scm_call_1 (SCM_VARIABLE_REF (process_define_module_var), |
1afff620 | 150 | scm_list_1 (convert_module_name (name))); |
d02b98e9 MV |
151 | if (init) |
152 | scm_c_call_with_current_module (module, (SCM (*)(void*))init, data); | |
153 | return module; | |
55000e5f MV |
154 | } |
155 | ||
d02b98e9 MV |
156 | void |
157 | scm_c_use_module (const char *name) | |
90184345 | 158 | { |
fdc28395 | 159 | scm_call_1 (SCM_VARIABLE_REF (process_use_modules_var), |
b64f4200 | 160 | scm_list_1 (scm_list_1 (convert_module_name (name)))); |
90184345 MD |
161 | } |
162 | ||
d02b98e9 | 163 | static SCM module_export_x_var; |
281004cc | 164 | |
608860a5 LC |
165 | SCM |
166 | scm_module_export (SCM module, SCM namelist) | |
06e80f59 | 167 | { |
8c330007 MD |
168 | return scm_call_2 (SCM_VARIABLE_REF (module_export_x_var), |
169 | module, namelist); | |
06e80f59 HWN |
170 | } |
171 | ||
eb880cef MV |
172 | |
173 | /* | |
174 | @code{scm_c_export}(@var{name-list}) | |
175 | ||
176 | @code{scm_c_export} exports the named bindings from the current | |
177 | module, making them visible to users of the module. This function | |
178 | takes a list of string arguments, terminated by NULL, e.g. | |
179 | ||
180 | @example | |
181 | scm_c_export ("add-double-record", "bamboozle-money", NULL); | |
182 | @end example | |
183 | */ | |
d02b98e9 MV |
184 | void |
185 | scm_c_export (const char *name, ...) | |
281004cc | 186 | { |
eb880cef | 187 | if (name) |
d02b98e9 | 188 | { |
eb880cef | 189 | va_list ap; |
cc95e00a | 190 | SCM names = scm_cons (scm_from_locale_symbol (name), SCM_EOL); |
eb880cef MV |
191 | SCM *tail = SCM_CDRLOC (names); |
192 | va_start (ap, name); | |
193 | while (1) | |
194 | { | |
195 | const char *n = va_arg (ap, const char *); | |
196 | if (n == NULL) | |
197 | break; | |
cc95e00a | 198 | *tail = scm_cons (scm_from_locale_symbol (n), SCM_EOL); |
eb880cef MV |
199 | tail = SCM_CDRLOC (*tail); |
200 | } | |
201 | va_end (ap); | |
608860a5 | 202 | scm_module_export (scm_current_module (), names); |
d02b98e9 | 203 | } |
281004cc MD |
204 | } |
205 | ||
06e80f59 | 206 | |
e3365c07 | 207 | /* Environments */ |
d164a5af MD |
208 | |
209 | SCM | |
6e8d25a6 | 210 | scm_top_level_env (SCM thunk) |
d164a5af MD |
211 | { |
212 | if (SCM_IMP (thunk)) | |
213 | return SCM_EOL; | |
214 | else | |
215 | return scm_cons (thunk, SCM_EOL); | |
216 | } | |
217 | ||
218 | SCM | |
219 | scm_env_top_level (SCM env) | |
220 | { | |
d2e53ed6 | 221 | while (scm_is_pair (env)) |
d164a5af | 222 | { |
c88b1456 | 223 | SCM car_env = SCM_CAR (env); |
d2e53ed6 | 224 | if (!scm_is_pair (car_env) && scm_is_true (scm_procedure_p (car_env))) |
c88b1456 | 225 | return car_env; |
d164a5af MD |
226 | env = SCM_CDR (env); |
227 | } | |
228 | return SCM_BOOL_F; | |
229 | } | |
230 | ||
86d31dfe MV |
231 | SCM_SYMBOL (sym_module, "module"); |
232 | ||
d02b98e9 MV |
233 | static SCM the_root_module_var; |
234 | ||
235 | static SCM | |
236 | the_root_module () | |
237 | { | |
238 | if (scm_module_system_booted_p) | |
239 | return SCM_VARIABLE_REF (the_root_module_var); | |
240 | else | |
241 | return SCM_BOOL_F; | |
242 | } | |
243 | ||
86d31dfe MV |
244 | SCM |
245 | scm_lookup_closure_module (SCM proc) | |
246 | { | |
7888309b | 247 | if (scm_is_false (proc)) |
d02b98e9 | 248 | return the_root_module (); |
86d31dfe MV |
249 | else if (SCM_EVAL_CLOSURE_P (proc)) |
250 | return SCM_PACK (SCM_SMOB_DATA (proc)); | |
251 | else | |
252 | { | |
253 | SCM mod = scm_procedure_property (proc, sym_module); | |
7888309b | 254 | if (scm_is_false (mod)) |
d02b98e9 | 255 | mod = the_root_module (); |
86d31dfe MV |
256 | return mod; |
257 | } | |
258 | } | |
259 | ||
e24ca538 MV |
260 | SCM_DEFINE (scm_env_module, "env-module", 1, 0, 0, |
261 | (SCM env), | |
262 | "Return the module of @var{ENV}, a lexical environment.") | |
263 | #define FUNC_NAME s_scm_env_module | |
86d31dfe MV |
264 | { |
265 | return scm_lookup_closure_module (scm_env_top_level (env)); | |
266 | } | |
e24ca538 | 267 | #undef FUNC_NAME |
86d31dfe | 268 | |
152abe96 MD |
269 | /* |
270 | * C level implementation of the standard eval closure | |
271 | * | |
dd18d312 NJ |
272 | * This increases loading speed substantially. The code may be |
273 | * replaced by something based on environments.[ch], in a future | |
274 | * release. | |
152abe96 MD |
275 | */ |
276 | ||
608860a5 LC |
277 | /* The `module-make-local-var!' variable. */ |
278 | static SCM module_make_local_var_x_var = SCM_UNSPECIFIED; | |
152abe96 | 279 | |
608860a5 LC |
280 | /* The `default-duplicate-binding-procedures' variable. */ |
281 | static SCM default_duplicate_binding_procedures_var = SCM_UNSPECIFIED; | |
282 | ||
283 | /* Return the list of default duplicate binding handlers (procedures). */ | |
284 | static inline SCM | |
285 | default_duplicate_binding_handlers (void) | |
286 | { | |
287 | SCM get_handlers; | |
288 | ||
289 | get_handlers = SCM_VARIABLE_REF (default_duplicate_binding_procedures_var); | |
290 | ||
291 | return (scm_call_0 (get_handlers)); | |
292 | } | |
293 | ||
294 | /* Resolve the import of SYM in MODULE, where SYM is currently provided by | |
295 | both IFACE1 as VAR1 and IFACE2 as VAR2. Return the variable chosen by the | |
296 | duplicate binding handlers or `#f'. */ | |
297 | static inline SCM | |
298 | resolve_duplicate_binding (SCM module, SCM sym, | |
299 | SCM iface1, SCM var1, | |
300 | SCM iface2, SCM var2) | |
301 | { | |
302 | SCM result = SCM_BOOL_F; | |
303 | ||
304 | if (!scm_is_eq (var1, var2)) | |
305 | { | |
306 | SCM val1, val2; | |
307 | SCM handlers, h, handler_args; | |
308 | ||
309 | val1 = SCM_VARIABLE_REF (var1); | |
310 | val2 = SCM_VARIABLE_REF (var2); | |
311 | ||
312 | val1 = (val1 == SCM_UNSPECIFIED) ? SCM_BOOL_F : val1; | |
313 | val2 = (val2 == SCM_UNSPECIFIED) ? SCM_BOOL_F : val2; | |
314 | ||
315 | handlers = SCM_MODULE_DUPLICATE_HANDLERS (module); | |
316 | if (scm_is_false (handlers)) | |
317 | handlers = default_duplicate_binding_handlers (); | |
318 | ||
319 | handler_args = scm_list_n (module, sym, | |
320 | iface1, val1, iface2, val2, | |
321 | var1, val1, | |
322 | SCM_UNDEFINED); | |
323 | ||
324 | for (h = handlers; | |
325 | scm_is_pair (h) && scm_is_false (result); | |
326 | h = SCM_CDR (h)) | |
327 | { | |
328 | result = scm_apply (SCM_CAR (h), handler_args, SCM_EOL); | |
329 | } | |
330 | } | |
331 | else | |
332 | result = var1; | |
333 | ||
334 | return result; | |
335 | } | |
336 | ||
337 | /* Lookup SYM as an imported variable of MODULE. */ | |
338 | static inline SCM | |
339 | module_imported_variable (SCM module, SCM sym) | |
340 | { | |
341 | #define SCM_BOUND_THING_P scm_is_true | |
342 | register SCM var, imports; | |
343 | ||
344 | /* Search cached imported bindings. */ | |
345 | imports = SCM_MODULE_IMPORT_OBARRAY (module); | |
346 | var = scm_hashq_ref (imports, sym, SCM_UNDEFINED); | |
347 | if (SCM_BOUND_THING_P (var)) | |
348 | return var; | |
349 | ||
350 | { | |
351 | /* Search the use list for yet uncached imported bindings, possibly | |
352 | resolving duplicates as needed and caching the result in the import | |
353 | obarray. */ | |
354 | SCM uses; | |
355 | SCM found_var = SCM_BOOL_F, found_iface = SCM_BOOL_F; | |
356 | ||
357 | for (uses = SCM_MODULE_USES (module); | |
358 | scm_is_pair (uses); | |
359 | uses = SCM_CDR (uses)) | |
360 | { | |
361 | SCM iface; | |
362 | ||
363 | iface = SCM_CAR (uses); | |
364 | var = scm_module_variable (iface, sym); | |
365 | ||
366 | if (SCM_BOUND_THING_P (var)) | |
367 | { | |
368 | if (SCM_BOUND_THING_P (found_var)) | |
369 | { | |
370 | /* SYM is a duplicate binding (imported more than once) so we | |
371 | need to resolve it. */ | |
372 | found_var = resolve_duplicate_binding (module, sym, | |
373 | found_iface, found_var, | |
374 | iface, var); | |
375 | if (scm_is_eq (found_var, var)) | |
376 | found_iface = iface; | |
377 | } | |
378 | else | |
379 | /* Keep track of the variable we found and check for other | |
380 | occurences of SYM in the use list. */ | |
381 | found_var = var, found_iface = iface; | |
382 | } | |
383 | } | |
384 | ||
385 | if (SCM_BOUND_THING_P (found_var)) | |
386 | { | |
387 | /* Save the lookup result for future reference. */ | |
388 | (void) scm_hashq_set_x (imports, sym, found_var); | |
389 | return found_var; | |
390 | } | |
391 | } | |
392 | ||
393 | return SCM_BOOL_F; | |
394 | #undef SCM_BOUND_THING_P | |
395 | } | |
396 | ||
397 | SCM_DEFINE (scm_module_local_variable, "module-local-variable", 2, 0, 0, | |
398 | (SCM module, SCM sym), | |
399 | "Return the variable bound to @var{sym} in @var{module}. Return " | |
400 | "@code{#f} is @var{sym} is not bound locally in @var{module}.") | |
401 | #define FUNC_NAME s_scm_module_local_variable | |
152abe96 | 402 | { |
dc187f33 | 403 | #define SCM_BOUND_THING_P(b) \ |
7888309b | 404 | (scm_is_true (b)) |
dc187f33 | 405 | |
608860a5 LC |
406 | register SCM b; |
407 | ||
408 | /* SCM_MODULE_TAG is not initialized yet when `boot-9.scm' is being | |
409 | evaluated. */ | |
410 | if (scm_module_system_booted_p) | |
411 | SCM_VALIDATE_MODULE (1, module); | |
412 | ||
413 | SCM_VALIDATE_SYMBOL (2, sym); | |
414 | ||
415 | ||
152abe96 | 416 | /* 1. Check module obarray */ |
608860a5 | 417 | b = scm_hashq_ref (SCM_MODULE_OBARRAY (module), sym, SCM_UNDEFINED); |
dc187f33 | 418 | if (SCM_BOUND_THING_P (b)) |
152abe96 | 419 | return b; |
608860a5 LC |
420 | |
421 | /* 2. Search imported bindings. In order to be consistent with | |
422 | `module-variable', the binder gets called only when no imported binding | |
423 | matches SYM. */ | |
424 | b = module_imported_variable (module, sym); | |
425 | if (SCM_BOUND_THING_P (b)) | |
426 | return SCM_BOOL_F; | |
427 | ||
152abe96 | 428 | { |
608860a5 | 429 | /* 3. Query the custom binder. */ |
e3365c07 | 430 | SCM binder = SCM_MODULE_BINDER (module); |
608860a5 | 431 | |
7888309b | 432 | if (scm_is_true (binder)) |
152abe96 | 433 | { |
fdc28395 | 434 | b = scm_call_3 (binder, module, sym, SCM_BOOL_F); |
dc187f33 | 435 | if (SCM_BOUND_THING_P (b)) |
152abe96 MD |
436 | return b; |
437 | } | |
438 | } | |
608860a5 LC |
439 | |
440 | return SCM_BOOL_F; | |
441 | ||
442 | #undef SCM_BOUND_THING_P | |
443 | } | |
444 | #undef FUNC_NAME | |
445 | ||
446 | SCM_DEFINE (scm_module_variable, "module-variable", 2, 0, 0, | |
447 | (SCM module, SCM sym), | |
448 | "Return the variable bound to @var{sym} in @var{module}. This " | |
449 | "may be both a local variable or an imported variable. Return " | |
450 | "@code{#f} is @var{sym} is not bound in @var{module}.") | |
451 | #define FUNC_NAME s_scm_module_variable | |
452 | { | |
453 | #define SCM_BOUND_THING_P(b) \ | |
454 | (scm_is_true (b)) | |
455 | ||
456 | register SCM var; | |
457 | ||
458 | if (scm_module_system_booted_p) | |
459 | SCM_VALIDATE_MODULE (1, module); | |
460 | ||
461 | SCM_VALIDATE_SYMBOL (2, sym); | |
462 | ||
463 | /* 1. Check module obarray */ | |
464 | var = scm_hashq_ref (SCM_MODULE_OBARRAY (module), sym, SCM_UNDEFINED); | |
465 | if (SCM_BOUND_THING_P (var)) | |
466 | return var; | |
467 | ||
468 | /* 2. Search among the imported variables. */ | |
469 | var = module_imported_variable (module, sym); | |
470 | if (SCM_BOUND_THING_P (var)) | |
471 | return var; | |
472 | ||
152abe96 | 473 | { |
608860a5 LC |
474 | /* 3. Query the custom binder. */ |
475 | SCM binder; | |
476 | ||
477 | binder = SCM_MODULE_BINDER (module); | |
478 | if (scm_is_true (binder)) | |
152abe96 | 479 | { |
608860a5 LC |
480 | var = scm_call_3 (binder, module, sym, SCM_BOOL_F); |
481 | if (SCM_BOUND_THING_P (var)) | |
482 | return var; | |
152abe96 | 483 | } |
152abe96 | 484 | } |
608860a5 LC |
485 | |
486 | return SCM_BOOL_F; | |
487 | ||
dc187f33 | 488 | #undef SCM_BOUND_THING_P |
152abe96 | 489 | } |
608860a5 | 490 | #undef FUNC_NAME |
152abe96 | 491 | |
92c2555f | 492 | scm_t_bits scm_tc16_eval_closure; |
152abe96 | 493 | |
86d31dfe MV |
494 | #define SCM_F_EVAL_CLOSURE_INTERFACE (1<<16) |
495 | #define SCM_EVAL_CLOSURE_INTERFACE_P(e) \ | |
496 | (SCM_CELL_WORD_0 (e) & SCM_F_EVAL_CLOSURE_INTERFACE) | |
497 | ||
fb43bf74 KN |
498 | /* NOTE: This function may be called by a smob application |
499 | or from another C function directly. */ | |
500 | SCM | |
501 | scm_eval_closure_lookup (SCM eclo, SCM sym, SCM definep) | |
152abe96 | 502 | { |
fb43bf74 | 503 | SCM module = SCM_PACK (SCM_SMOB_DATA (eclo)); |
7888309b | 504 | if (scm_is_true (definep)) |
86d31dfe MV |
505 | { |
506 | if (SCM_EVAL_CLOSURE_INTERFACE_P (eclo)) | |
507 | return SCM_BOOL_F; | |
fdc28395 KN |
508 | return scm_call_2 (SCM_VARIABLE_REF (module_make_local_var_x_var), |
509 | module, sym); | |
86d31dfe | 510 | } |
152abe96 | 511 | else |
608860a5 | 512 | return scm_module_variable (module, sym); |
152abe96 MD |
513 | } |
514 | ||
515 | SCM_DEFINE (scm_standard_eval_closure, "standard-eval-closure", 1, 0, 0, | |
516 | (SCM module), | |
84526793 | 517 | "Return an eval closure for the module @var{module}.") |
152abe96 MD |
518 | #define FUNC_NAME s_scm_standard_eval_closure |
519 | { | |
e841c3e0 | 520 | SCM_RETURN_NEWSMOB (scm_tc16_eval_closure, SCM_UNPACK (module)); |
152abe96 MD |
521 | } |
522 | #undef FUNC_NAME | |
523 | ||
e4da0740 | 524 | |
86d31dfe MV |
525 | SCM_DEFINE (scm_standard_interface_eval_closure, |
526 | "standard-interface-eval-closure", 1, 0, 0, | |
527 | (SCM module), | |
528 | "Return a interface eval closure for the module @var{module}. " | |
529 | "Such a closure does not allow new bindings to be added.") | |
530 | #define FUNC_NAME s_scm_standard_interface_eval_closure | |
531 | { | |
532 | SCM_RETURN_NEWSMOB (scm_tc16_eval_closure | SCM_F_EVAL_CLOSURE_INTERFACE, | |
533 | SCM_UNPACK (module)); | |
534 | } | |
535 | #undef FUNC_NAME | |
536 | ||
d02b98e9 MV |
537 | SCM |
538 | scm_module_lookup_closure (SCM module) | |
539 | { | |
7888309b | 540 | if (scm_is_false (module)) |
d02b98e9 MV |
541 | return SCM_BOOL_F; |
542 | else | |
543 | return SCM_MODULE_EVAL_CLOSURE (module); | |
544 | } | |
545 | ||
546 | SCM | |
547 | scm_current_module_lookup_closure () | |
548 | { | |
549 | if (scm_module_system_booted_p) | |
550 | return scm_module_lookup_closure (scm_current_module ()); | |
551 | else | |
552 | return SCM_BOOL_F; | |
553 | } | |
554 | ||
555 | SCM | |
556 | scm_module_transformer (SCM module) | |
557 | { | |
7888309b | 558 | if (scm_is_false (module)) |
d02b98e9 MV |
559 | return SCM_BOOL_F; |
560 | else | |
561 | return SCM_MODULE_TRANSFORMER (module); | |
562 | } | |
563 | ||
564 | SCM | |
565 | scm_current_module_transformer () | |
566 | { | |
567 | if (scm_module_system_booted_p) | |
568 | return scm_module_transformer (scm_current_module ()); | |
569 | else | |
570 | return SCM_BOOL_F; | |
571 | } | |
572 | ||
109c2c9f MD |
573 | SCM_DEFINE (scm_module_import_interface, "module-import-interface", 2, 0, 0, |
574 | (SCM module, SCM sym), | |
608860a5 LC |
575 | "Return the module or interface from which @var{sym} is imported " |
576 | "in @var{module}. If @var{sym} is not imported (i.e., it is not " | |
577 | "defined in @var{module} or it is a module-local binding instead " | |
578 | "of an imported one), then @code{#f} is returned.") | |
109c2c9f MD |
579 | #define FUNC_NAME s_scm_module_import_interface |
580 | { | |
608860a5 LC |
581 | SCM var, result = SCM_BOOL_F; |
582 | ||
583 | SCM_VALIDATE_MODULE (1, module); | |
584 | SCM_VALIDATE_SYMBOL (2, sym); | |
585 | ||
586 | var = scm_module_variable (module, sym); | |
587 | if (scm_is_true (var)) | |
109c2c9f | 588 | { |
608860a5 LC |
589 | /* Look for the module that provides VAR. */ |
590 | SCM local_var; | |
591 | ||
592 | local_var = scm_hashq_ref (SCM_MODULE_OBARRAY (module), sym, | |
593 | SCM_UNDEFINED); | |
594 | if (scm_is_eq (local_var, var)) | |
595 | result = module; | |
596 | else | |
597 | { | |
598 | /* Look for VAR among the used modules. */ | |
599 | SCM uses, imported_var; | |
600 | ||
601 | for (uses = SCM_MODULE_USES (module); | |
602 | scm_is_pair (uses) && scm_is_false (result); | |
603 | uses = SCM_CDR (uses)) | |
604 | { | |
605 | imported_var = scm_module_variable (SCM_CAR (uses), sym); | |
606 | if (scm_is_eq (imported_var, var)) | |
607 | result = SCM_CAR (uses); | |
608 | } | |
609 | } | |
109c2c9f | 610 | } |
608860a5 LC |
611 | |
612 | return result; | |
109c2c9f MD |
613 | } |
614 | #undef FUNC_NAME | |
615 | ||
86d31dfe MV |
616 | /* scm_sym2var |
617 | * | |
618 | * looks up the variable bound to SYM according to PROC. PROC should be | |
619 | * a `eval closure' of some module. | |
620 | * | |
621 | * When no binding exists, and DEFINEP is true, create a new binding | |
622 | * with a initial value of SCM_UNDEFINED. Return `#f' when DEFINEP as | |
623 | * false and no binding exists. | |
624 | * | |
625 | * When PROC is `#f', it is ignored and the binding is searched for in | |
626 | * the scm_pre_modules_obarray (a `eq' hash table). | |
627 | */ | |
628 | ||
629 | SCM scm_pre_modules_obarray; | |
630 | ||
631 | SCM | |
632 | scm_sym2var (SCM sym, SCM proc, SCM definep) | |
633 | #define FUNC_NAME "scm_sym2var" | |
634 | { | |
635 | SCM var; | |
636 | ||
637 | if (SCM_NIMP (proc)) | |
638 | { | |
639 | if (SCM_EVAL_CLOSURE_P (proc)) | |
640 | { | |
641 | /* Bypass evaluator in the standard case. */ | |
642 | var = scm_eval_closure_lookup (proc, sym, definep); | |
643 | } | |
644 | else | |
fdc28395 | 645 | var = scm_call_2 (proc, sym, definep); |
86d31dfe MV |
646 | } |
647 | else | |
648 | { | |
649 | SCM handle; | |
650 | ||
7888309b | 651 | if (scm_is_false (definep)) |
86d31dfe MV |
652 | var = scm_hashq_ref (scm_pre_modules_obarray, sym, SCM_BOOL_F); |
653 | else | |
654 | { | |
655 | handle = scm_hashq_create_handle_x (scm_pre_modules_obarray, | |
656 | sym, SCM_BOOL_F); | |
657 | var = SCM_CDR (handle); | |
7888309b | 658 | if (scm_is_false (var)) |
86d31dfe MV |
659 | { |
660 | var = scm_make_variable (SCM_UNDEFINED); | |
86d31dfe MV |
661 | SCM_SETCDR (handle, var); |
662 | } | |
663 | } | |
664 | } | |
665 | ||
7888309b | 666 | if (scm_is_true (var) && !SCM_VARIABLEP (var)) |
1afff620 | 667 | SCM_MISC_ERROR ("~S is not bound to a variable", scm_list_1 (sym)); |
86d31dfe MV |
668 | |
669 | return var; | |
670 | } | |
671 | #undef FUNC_NAME | |
672 | ||
673 | SCM | |
674 | scm_c_module_lookup (SCM module, const char *name) | |
675 | { | |
cc95e00a | 676 | return scm_module_lookup (module, scm_from_locale_symbol (name)); |
86d31dfe MV |
677 | } |
678 | ||
679 | SCM | |
680 | scm_module_lookup (SCM module, SCM sym) | |
681 | #define FUNC_NAME "module-lookup" | |
682 | { | |
683 | SCM var; | |
684 | SCM_VALIDATE_MODULE (1, module); | |
685 | ||
686 | var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F); | |
7888309b | 687 | if (scm_is_false (var)) |
1afff620 | 688 | SCM_MISC_ERROR ("unbound variable: ~S", scm_list_1 (sym)); |
86d31dfe MV |
689 | return var; |
690 | } | |
691 | #undef FUNC_NAME | |
692 | ||
693 | SCM | |
694 | scm_c_lookup (const char *name) | |
695 | { | |
cc95e00a | 696 | return scm_lookup (scm_from_locale_symbol (name)); |
86d31dfe MV |
697 | } |
698 | ||
699 | SCM | |
700 | scm_lookup (SCM sym) | |
701 | { | |
702 | SCM var = | |
703 | scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_F); | |
7888309b | 704 | if (scm_is_false (var)) |
1afff620 | 705 | scm_misc_error ("scm_lookup", "unbound variable: ~S", scm_list_1 (sym)); |
86d31dfe MV |
706 | return var; |
707 | } | |
708 | ||
709 | SCM | |
710 | scm_c_module_define (SCM module, const char *name, SCM value) | |
711 | { | |
cc95e00a | 712 | return scm_module_define (module, scm_from_locale_symbol (name), value); |
86d31dfe MV |
713 | } |
714 | ||
715 | SCM | |
716 | scm_module_define (SCM module, SCM sym, SCM value) | |
717 | #define FUNC_NAME "module-define" | |
718 | { | |
719 | SCM var; | |
720 | SCM_VALIDATE_MODULE (1, module); | |
721 | ||
722 | var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_T); | |
723 | SCM_VARIABLE_SET (var, value); | |
724 | return var; | |
725 | } | |
726 | #undef FUNC_NAME | |
727 | ||
728 | SCM | |
729 | scm_c_define (const char *name, SCM value) | |
730 | { | |
cc95e00a | 731 | return scm_define (scm_from_locale_symbol (name), value); |
86d31dfe MV |
732 | } |
733 | ||
734 | SCM | |
735 | scm_define (SCM sym, SCM value) | |
736 | { | |
737 | SCM var = | |
738 | scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_T); | |
739 | SCM_VARIABLE_SET (var, value); | |
740 | return var; | |
741 | } | |
742 | ||
608860a5 LC |
743 | SCM_DEFINE (scm_module_reverse_lookup, "module-reverse-lookup", 2, 0, 0, |
744 | (SCM module, SCM variable), | |
745 | "Return the symbol under which @var{variable} is bound in " | |
746 | "@var{module} or @var{#f} if @var{variable} is not visible " | |
747 | "from @var{module}. If @var{module} is @code{#f}, then the " | |
748 | "pre-module obarray is used.") | |
749 | #define FUNC_NAME s_scm_module_reverse_lookup | |
86d31dfe MV |
750 | { |
751 | SCM obarray; | |
c014a02e | 752 | long i, n; |
86d31dfe | 753 | |
7888309b | 754 | if (scm_is_false (module)) |
86d31dfe MV |
755 | obarray = scm_pre_modules_obarray; |
756 | else | |
757 | { | |
758 | SCM_VALIDATE_MODULE (1, module); | |
759 | obarray = SCM_MODULE_OBARRAY (module); | |
760 | } | |
761 | ||
6dc1cd1e MV |
762 | if (!SCM_HASHTABLE_P (obarray)) |
763 | return SCM_BOOL_F; | |
764 | ||
86d31dfe MV |
765 | /* XXX - We do not use scm_hash_fold here to avoid searching the |
766 | whole obarray. We should have a scm_hash_find procedure. */ | |
767 | ||
c35738c1 | 768 | n = SCM_HASHTABLE_N_BUCKETS (obarray); |
86d31dfe MV |
769 | for (i = 0; i < n; ++i) |
770 | { | |
4057a3e0 | 771 | SCM ls = SCM_HASHTABLE_BUCKET (obarray, i), handle; |
d2e53ed6 | 772 | while (!scm_is_null (ls)) |
86d31dfe MV |
773 | { |
774 | handle = SCM_CAR (ls); | |
775 | if (SCM_CDR (handle) == variable) | |
776 | return SCM_CAR (handle); | |
777 | ls = SCM_CDR (ls); | |
778 | } | |
779 | } | |
780 | ||
608860a5 | 781 | /* Try the `uses' list. */ |
86d31dfe MV |
782 | { |
783 | SCM uses = SCM_MODULE_USES (module); | |
d2e53ed6 | 784 | while (scm_is_pair (uses)) |
86d31dfe MV |
785 | { |
786 | SCM sym = scm_module_reverse_lookup (SCM_CAR (uses), variable); | |
7888309b | 787 | if (scm_is_true (sym)) |
86d31dfe MV |
788 | return sym; |
789 | uses = SCM_CDR (uses); | |
790 | } | |
791 | } | |
792 | ||
793 | return SCM_BOOL_F; | |
794 | } | |
795 | #undef FUNC_NAME | |
796 | ||
797 | SCM_DEFINE (scm_get_pre_modules_obarray, "%get-pre-modules-obarray", 0, 0, 0, | |
798 | (), | |
799 | "Return the obarray that is used for all new bindings before " | |
800 | "the module system is booted. The first call to " | |
801 | "@code{set-current-module} will boot the module system.") | |
802 | #define FUNC_NAME s_scm_get_pre_modules_obarray | |
803 | { | |
804 | return scm_pre_modules_obarray; | |
805 | } | |
806 | #undef FUNC_NAME | |
807 | ||
d02b98e9 MV |
808 | SCM_SYMBOL (scm_sym_system_module, "system-module"); |
809 | ||
810 | SCM | |
811 | scm_system_module_env_p (SCM env) | |
812 | { | |
813 | SCM proc = scm_env_top_level (env); | |
7888309b | 814 | if (scm_is_false (proc)) |
d02b98e9 | 815 | return SCM_BOOL_T; |
7888309b | 816 | return ((scm_is_true (scm_procedure_property (proc, |
d02b98e9 MV |
817 | scm_sym_system_module))) |
818 | ? SCM_BOOL_T | |
819 | : SCM_BOOL_F); | |
820 | } | |
821 | ||
86d31dfe MV |
822 | void |
823 | scm_modules_prehistory () | |
824 | { | |
825 | scm_pre_modules_obarray | |
231a4ea8 | 826 | = scm_permanent_object (scm_c_make_hash_table (1533)); |
86d31dfe MV |
827 | } |
828 | ||
1ffa265b MD |
829 | void |
830 | scm_init_modules () | |
831 | { | |
a0599745 | 832 | #include "libguile/modules.x" |
86d31dfe MV |
833 | module_make_local_var_x_var = scm_c_define ("module-make-local-var!", |
834 | SCM_UNDEFINED); | |
e841c3e0 KN |
835 | scm_tc16_eval_closure = scm_make_smob_type ("eval-closure", 0); |
836 | scm_set_smob_mark (scm_tc16_eval_closure, scm_markcdr); | |
837 | scm_set_smob_apply (scm_tc16_eval_closure, scm_eval_closure_lookup, 2, 0, 0); | |
55000e5f MV |
838 | |
839 | the_module = scm_permanent_object (scm_make_fluid ()); | |
1ffa265b MD |
840 | } |
841 | ||
86d31dfe | 842 | static void |
1ffa265b MD |
843 | scm_post_boot_init_modules () |
844 | { | |
86d31dfe MV |
845 | #define PERM(x) scm_permanent_object(x) |
846 | ||
847 | SCM module_type = SCM_VARIABLE_REF (scm_c_lookup ("module-type")); | |
904a077d | 848 | scm_module_tag = (SCM_CELL_WORD_1 (module_type) + scm_tc3_struct); |
d02b98e9 MV |
849 | |
850 | resolve_module_var = PERM (scm_c_lookup ("resolve-module")); | |
851 | process_define_module_var = PERM (scm_c_lookup ("process-define-module")); | |
852 | process_use_modules_var = PERM (scm_c_lookup ("process-use-modules")); | |
853 | module_export_x_var = PERM (scm_c_lookup ("module-export!")); | |
854 | the_root_module_var = PERM (scm_c_lookup ("the-root-module")); | |
608860a5 LC |
855 | default_duplicate_binding_procedures_var = |
856 | PERM (scm_c_lookup ("default-duplicate-binding-procedures")); | |
d02b98e9 | 857 | |
e3365c07 | 858 | scm_module_system_booted_p = 1; |
1ffa265b | 859 | } |
89e00824 ML |
860 | |
861 | /* | |
862 | Local Variables: | |
863 | c-file-style: "gnu" | |
864 | End: | |
865 | */ |