| 1 | /* Copyright (C) 1998,2000,2001,2002, 2003, 2004 Free Software Foundation, Inc. |
| 2 | * |
| 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. |
| 7 | * |
| 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. |
| 12 | * |
| 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | |
| 19 | \f |
| 20 | |
| 21 | #include <stdarg.h> |
| 22 | |
| 23 | #include "libguile/_scm.h" |
| 24 | |
| 25 | #include "libguile/eval.h" |
| 26 | #include "libguile/smob.h" |
| 27 | #include "libguile/procprop.h" |
| 28 | #include "libguile/vectors.h" |
| 29 | #include "libguile/hashtab.h" |
| 30 | #include "libguile/struct.h" |
| 31 | #include "libguile/variable.h" |
| 32 | #include "libguile/fluids.h" |
| 33 | #include "libguile/deprecation.h" |
| 34 | |
| 35 | #include "libguile/modules.h" |
| 36 | |
| 37 | int scm_module_system_booted_p = 0; |
| 38 | |
| 39 | scm_t_bits scm_module_tag; |
| 40 | |
| 41 | static SCM the_module; |
| 42 | |
| 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 |
| 47 | { |
| 48 | return scm_fluid_ref (the_module); |
| 49 | } |
| 50 | #undef FUNC_NAME |
| 51 | |
| 52 | static void scm_post_boot_init_modules (void); |
| 53 | |
| 54 | SCM_DEFINE (scm_set_current_module, "set-current-module", 1, 0, 0, |
| 55 | (SCM module), |
| 56 | "Set the current module to @var{module} and return\n" |
| 57 | "the previous current module.") |
| 58 | #define FUNC_NAME s_scm_set_current_module |
| 59 | { |
| 60 | SCM old; |
| 61 | |
| 62 | if (!scm_module_system_booted_p) |
| 63 | scm_post_boot_init_modules (); |
| 64 | |
| 65 | SCM_VALIDATE_MODULE (SCM_ARG1, module); |
| 66 | |
| 67 | old = scm_current_module (); |
| 68 | scm_fluid_set_x (the_module, module); |
| 69 | |
| 70 | return old; |
| 71 | } |
| 72 | #undef FUNC_NAME |
| 73 | |
| 74 | SCM_DEFINE (scm_interaction_environment, "interaction-environment", 0, 0, 0, |
| 75 | (), |
| 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.") |
| 81 | #define FUNC_NAME s_scm_interaction_environment |
| 82 | { |
| 83 | return scm_current_module (); |
| 84 | } |
| 85 | #undef FUNC_NAME |
| 86 | |
| 87 | SCM |
| 88 | scm_c_call_with_current_module (SCM module, |
| 89 | SCM (*func)(void *), void *data) |
| 90 | { |
| 91 | return scm_c_with_fluid (the_module, module, func, data); |
| 92 | } |
| 93 | |
| 94 | void |
| 95 | scm_frame_current_module (SCM module) |
| 96 | { |
| 97 | scm_frame_fluid (the_module, module); |
| 98 | } |
| 99 | |
| 100 | /* |
| 101 | convert "A B C" to scheme list (A B C) |
| 102 | */ |
| 103 | static SCM |
| 104 | convert_module_name (const char *name) |
| 105 | { |
| 106 | SCM list = SCM_EOL; |
| 107 | SCM *tail = &list; |
| 108 | |
| 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 | { |
| 119 | SCM sym = scm_from_locale_symboln (name, ptr-name); |
| 120 | *tail = scm_cons (sym, SCM_EOL); |
| 121 | tail = SCM_CDRLOC (*tail); |
| 122 | } |
| 123 | name = ptr; |
| 124 | } |
| 125 | |
| 126 | return list; |
| 127 | } |
| 128 | |
| 129 | static SCM process_define_module_var; |
| 130 | static SCM process_use_modules_var; |
| 131 | static SCM resolve_module_var; |
| 132 | |
| 133 | SCM |
| 134 | scm_c_resolve_module (const char *name) |
| 135 | { |
| 136 | return scm_resolve_module (convert_module_name (name)); |
| 137 | } |
| 138 | |
| 139 | SCM |
| 140 | scm_resolve_module (SCM name) |
| 141 | { |
| 142 | return scm_call_1 (SCM_VARIABLE_REF (resolve_module_var), name); |
| 143 | } |
| 144 | |
| 145 | SCM |
| 146 | scm_c_define_module (const char *name, |
| 147 | void (*init)(void *), void *data) |
| 148 | { |
| 149 | SCM module = scm_call_1 (SCM_VARIABLE_REF (process_define_module_var), |
| 150 | scm_list_1 (convert_module_name (name))); |
| 151 | if (init) |
| 152 | scm_c_call_with_current_module (module, (SCM (*)(void*))init, data); |
| 153 | return module; |
| 154 | } |
| 155 | |
| 156 | void |
| 157 | scm_c_use_module (const char *name) |
| 158 | { |
| 159 | scm_call_1 (SCM_VARIABLE_REF (process_use_modules_var), |
| 160 | scm_list_1 (scm_list_1 (convert_module_name (name)))); |
| 161 | } |
| 162 | |
| 163 | static SCM module_export_x_var; |
| 164 | |
| 165 | |
| 166 | /* |
| 167 | TODO: should export this function? --hwn. |
| 168 | */ |
| 169 | static SCM |
| 170 | scm_export (SCM module, SCM namelist) |
| 171 | { |
| 172 | return scm_call_2 (SCM_VARIABLE_REF (module_export_x_var), |
| 173 | module, namelist); |
| 174 | } |
| 175 | |
| 176 | |
| 177 | /* |
| 178 | @code{scm_c_export}(@var{name-list}) |
| 179 | |
| 180 | @code{scm_c_export} exports the named bindings from the current |
| 181 | module, making them visible to users of the module. This function |
| 182 | takes a list of string arguments, terminated by NULL, e.g. |
| 183 | |
| 184 | @example |
| 185 | scm_c_export ("add-double-record", "bamboozle-money", NULL); |
| 186 | @end example |
| 187 | */ |
| 188 | void |
| 189 | scm_c_export (const char *name, ...) |
| 190 | { |
| 191 | if (name) |
| 192 | { |
| 193 | va_list ap; |
| 194 | SCM names = scm_cons (scm_from_locale_symbol (name), SCM_EOL); |
| 195 | SCM *tail = SCM_CDRLOC (names); |
| 196 | va_start (ap, name); |
| 197 | while (1) |
| 198 | { |
| 199 | const char *n = va_arg (ap, const char *); |
| 200 | if (n == NULL) |
| 201 | break; |
| 202 | *tail = scm_cons (scm_from_locale_symbol (n), SCM_EOL); |
| 203 | tail = SCM_CDRLOC (*tail); |
| 204 | } |
| 205 | va_end (ap); |
| 206 | scm_export (scm_current_module(), names); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | |
| 211 | /* Environments */ |
| 212 | |
| 213 | SCM |
| 214 | scm_top_level_env (SCM thunk) |
| 215 | { |
| 216 | if (SCM_IMP (thunk)) |
| 217 | return SCM_EOL; |
| 218 | else |
| 219 | return scm_cons (thunk, SCM_EOL); |
| 220 | } |
| 221 | |
| 222 | SCM |
| 223 | scm_env_top_level (SCM env) |
| 224 | { |
| 225 | while (scm_is_pair (env)) |
| 226 | { |
| 227 | SCM car_env = SCM_CAR (env); |
| 228 | if (!scm_is_pair (car_env) && scm_is_true (scm_procedure_p (car_env))) |
| 229 | return car_env; |
| 230 | env = SCM_CDR (env); |
| 231 | } |
| 232 | return SCM_BOOL_F; |
| 233 | } |
| 234 | |
| 235 | SCM_SYMBOL (sym_module, "module"); |
| 236 | |
| 237 | static SCM the_root_module_var; |
| 238 | |
| 239 | static SCM |
| 240 | the_root_module () |
| 241 | { |
| 242 | if (scm_module_system_booted_p) |
| 243 | return SCM_VARIABLE_REF (the_root_module_var); |
| 244 | else |
| 245 | return SCM_BOOL_F; |
| 246 | } |
| 247 | |
| 248 | SCM |
| 249 | scm_lookup_closure_module (SCM proc) |
| 250 | { |
| 251 | if (scm_is_false (proc)) |
| 252 | return the_root_module (); |
| 253 | else if (SCM_EVAL_CLOSURE_P (proc)) |
| 254 | return SCM_PACK (SCM_SMOB_DATA (proc)); |
| 255 | else |
| 256 | { |
| 257 | SCM mod = scm_procedure_property (proc, sym_module); |
| 258 | if (scm_is_false (mod)) |
| 259 | mod = the_root_module (); |
| 260 | return mod; |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | SCM_DEFINE (scm_env_module, "env-module", 1, 0, 0, |
| 265 | (SCM env), |
| 266 | "Return the module of @var{ENV}, a lexical environment.") |
| 267 | #define FUNC_NAME s_scm_env_module |
| 268 | { |
| 269 | return scm_lookup_closure_module (scm_env_top_level (env)); |
| 270 | } |
| 271 | #undef FUNC_NAME |
| 272 | |
| 273 | /* |
| 274 | * C level implementation of the standard eval closure |
| 275 | * |
| 276 | * This increases loading speed substantially. |
| 277 | * The code will be replaced by the low-level environments in next release. |
| 278 | */ |
| 279 | |
| 280 | static SCM module_make_local_var_x_var; |
| 281 | |
| 282 | static SCM |
| 283 | module_variable (SCM module, SCM sym) |
| 284 | { |
| 285 | #define SCM_BOUND_THING_P(b) \ |
| 286 | (scm_is_true (b)) |
| 287 | |
| 288 | /* 1. Check module obarray */ |
| 289 | SCM b = scm_hashq_ref (SCM_MODULE_OBARRAY (module), sym, SCM_UNDEFINED); |
| 290 | if (SCM_BOUND_THING_P (b)) |
| 291 | return b; |
| 292 | { |
| 293 | SCM binder = SCM_MODULE_BINDER (module); |
| 294 | if (scm_is_true (binder)) |
| 295 | /* 2. Custom binder */ |
| 296 | { |
| 297 | b = scm_call_3 (binder, module, sym, SCM_BOOL_F); |
| 298 | if (SCM_BOUND_THING_P (b)) |
| 299 | return b; |
| 300 | } |
| 301 | } |
| 302 | { |
| 303 | /* 3. Search the use list */ |
| 304 | SCM uses = SCM_MODULE_USES (module); |
| 305 | while (scm_is_pair (uses)) |
| 306 | { |
| 307 | b = module_variable (SCM_CAR (uses), sym); |
| 308 | if (SCM_BOUND_THING_P (b)) |
| 309 | return b; |
| 310 | uses = SCM_CDR (uses); |
| 311 | } |
| 312 | return SCM_BOOL_F; |
| 313 | } |
| 314 | #undef SCM_BOUND_THING_P |
| 315 | } |
| 316 | |
| 317 | scm_t_bits scm_tc16_eval_closure; |
| 318 | |
| 319 | #define SCM_F_EVAL_CLOSURE_INTERFACE (1<<16) |
| 320 | #define SCM_EVAL_CLOSURE_INTERFACE_P(e) \ |
| 321 | (SCM_CELL_WORD_0 (e) & SCM_F_EVAL_CLOSURE_INTERFACE) |
| 322 | |
| 323 | /* NOTE: This function may be called by a smob application |
| 324 | or from another C function directly. */ |
| 325 | SCM |
| 326 | scm_eval_closure_lookup (SCM eclo, SCM sym, SCM definep) |
| 327 | { |
| 328 | SCM module = SCM_PACK (SCM_SMOB_DATA (eclo)); |
| 329 | if (scm_is_true (definep)) |
| 330 | { |
| 331 | if (SCM_EVAL_CLOSURE_INTERFACE_P (eclo)) |
| 332 | return SCM_BOOL_F; |
| 333 | return scm_call_2 (SCM_VARIABLE_REF (module_make_local_var_x_var), |
| 334 | module, sym); |
| 335 | } |
| 336 | else |
| 337 | return module_variable (module, sym); |
| 338 | } |
| 339 | |
| 340 | SCM_DEFINE (scm_standard_eval_closure, "standard-eval-closure", 1, 0, 0, |
| 341 | (SCM module), |
| 342 | "Return an eval closure for the module @var{module}.") |
| 343 | #define FUNC_NAME s_scm_standard_eval_closure |
| 344 | { |
| 345 | SCM_RETURN_NEWSMOB (scm_tc16_eval_closure, SCM_UNPACK (module)); |
| 346 | } |
| 347 | #undef FUNC_NAME |
| 348 | |
| 349 | |
| 350 | SCM_DEFINE (scm_standard_interface_eval_closure, |
| 351 | "standard-interface-eval-closure", 1, 0, 0, |
| 352 | (SCM module), |
| 353 | "Return a interface eval closure for the module @var{module}. " |
| 354 | "Such a closure does not allow new bindings to be added.") |
| 355 | #define FUNC_NAME s_scm_standard_interface_eval_closure |
| 356 | { |
| 357 | SCM_RETURN_NEWSMOB (scm_tc16_eval_closure | SCM_F_EVAL_CLOSURE_INTERFACE, |
| 358 | SCM_UNPACK (module)); |
| 359 | } |
| 360 | #undef FUNC_NAME |
| 361 | |
| 362 | SCM |
| 363 | scm_module_lookup_closure (SCM module) |
| 364 | { |
| 365 | if (scm_is_false (module)) |
| 366 | return SCM_BOOL_F; |
| 367 | else |
| 368 | return SCM_MODULE_EVAL_CLOSURE (module); |
| 369 | } |
| 370 | |
| 371 | SCM |
| 372 | scm_current_module_lookup_closure () |
| 373 | { |
| 374 | if (scm_module_system_booted_p) |
| 375 | return scm_module_lookup_closure (scm_current_module ()); |
| 376 | else |
| 377 | return SCM_BOOL_F; |
| 378 | } |
| 379 | |
| 380 | SCM |
| 381 | scm_module_transformer (SCM module) |
| 382 | { |
| 383 | if (scm_is_false (module)) |
| 384 | return SCM_BOOL_F; |
| 385 | else |
| 386 | return SCM_MODULE_TRANSFORMER (module); |
| 387 | } |
| 388 | |
| 389 | SCM |
| 390 | scm_current_module_transformer () |
| 391 | { |
| 392 | if (scm_module_system_booted_p) |
| 393 | return scm_module_transformer (scm_current_module ()); |
| 394 | else |
| 395 | return SCM_BOOL_F; |
| 396 | } |
| 397 | |
| 398 | SCM_DEFINE (scm_module_import_interface, "module-import-interface", 2, 0, 0, |
| 399 | (SCM module, SCM sym), |
| 400 | "") |
| 401 | #define FUNC_NAME s_scm_module_import_interface |
| 402 | { |
| 403 | #define SCM_BOUND_THING_P(b) (scm_is_true (b)) |
| 404 | SCM uses; |
| 405 | SCM_VALIDATE_MODULE (SCM_ARG1, module); |
| 406 | /* Search the use list */ |
| 407 | uses = SCM_MODULE_USES (module); |
| 408 | while (scm_is_pair (uses)) |
| 409 | { |
| 410 | SCM _interface = SCM_CAR (uses); |
| 411 | /* 1. Check module obarray */ |
| 412 | SCM b = scm_hashq_ref (SCM_MODULE_OBARRAY (_interface), sym, SCM_BOOL_F); |
| 413 | if (SCM_BOUND_THING_P (b)) |
| 414 | return _interface; |
| 415 | { |
| 416 | SCM binder = SCM_MODULE_BINDER (_interface); |
| 417 | if (scm_is_true (binder)) |
| 418 | /* 2. Custom binder */ |
| 419 | { |
| 420 | b = scm_call_3 (binder, _interface, sym, SCM_BOOL_F); |
| 421 | if (SCM_BOUND_THING_P (b)) |
| 422 | return _interface; |
| 423 | } |
| 424 | } |
| 425 | /* 3. Search use list recursively. */ |
| 426 | _interface = scm_module_import_interface (_interface, sym); |
| 427 | if (scm_is_true (_interface)) |
| 428 | return _interface; |
| 429 | uses = SCM_CDR (uses); |
| 430 | } |
| 431 | return SCM_BOOL_F; |
| 432 | } |
| 433 | #undef FUNC_NAME |
| 434 | |
| 435 | /* scm_sym2var |
| 436 | * |
| 437 | * looks up the variable bound to SYM according to PROC. PROC should be |
| 438 | * a `eval closure' of some module. |
| 439 | * |
| 440 | * When no binding exists, and DEFINEP is true, create a new binding |
| 441 | * with a initial value of SCM_UNDEFINED. Return `#f' when DEFINEP as |
| 442 | * false and no binding exists. |
| 443 | * |
| 444 | * When PROC is `#f', it is ignored and the binding is searched for in |
| 445 | * the scm_pre_modules_obarray (a `eq' hash table). |
| 446 | */ |
| 447 | |
| 448 | SCM scm_pre_modules_obarray; |
| 449 | |
| 450 | SCM |
| 451 | scm_sym2var (SCM sym, SCM proc, SCM definep) |
| 452 | #define FUNC_NAME "scm_sym2var" |
| 453 | { |
| 454 | SCM var; |
| 455 | |
| 456 | if (SCM_NIMP (proc)) |
| 457 | { |
| 458 | if (SCM_EVAL_CLOSURE_P (proc)) |
| 459 | { |
| 460 | /* Bypass evaluator in the standard case. */ |
| 461 | var = scm_eval_closure_lookup (proc, sym, definep); |
| 462 | } |
| 463 | else |
| 464 | var = scm_call_2 (proc, sym, definep); |
| 465 | } |
| 466 | else |
| 467 | { |
| 468 | SCM handle; |
| 469 | |
| 470 | if (scm_is_false (definep)) |
| 471 | var = scm_hashq_ref (scm_pre_modules_obarray, sym, SCM_BOOL_F); |
| 472 | else |
| 473 | { |
| 474 | handle = scm_hashq_create_handle_x (scm_pre_modules_obarray, |
| 475 | sym, SCM_BOOL_F); |
| 476 | var = SCM_CDR (handle); |
| 477 | if (scm_is_false (var)) |
| 478 | { |
| 479 | var = scm_make_variable (SCM_UNDEFINED); |
| 480 | SCM_SETCDR (handle, var); |
| 481 | } |
| 482 | } |
| 483 | } |
| 484 | |
| 485 | if (scm_is_true (var) && !SCM_VARIABLEP (var)) |
| 486 | SCM_MISC_ERROR ("~S is not bound to a variable", scm_list_1 (sym)); |
| 487 | |
| 488 | return var; |
| 489 | } |
| 490 | #undef FUNC_NAME |
| 491 | |
| 492 | SCM |
| 493 | scm_c_module_lookup (SCM module, const char *name) |
| 494 | { |
| 495 | return scm_module_lookup (module, scm_from_locale_symbol (name)); |
| 496 | } |
| 497 | |
| 498 | SCM |
| 499 | scm_module_lookup (SCM module, SCM sym) |
| 500 | #define FUNC_NAME "module-lookup" |
| 501 | { |
| 502 | SCM var; |
| 503 | SCM_VALIDATE_MODULE (1, module); |
| 504 | |
| 505 | var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_F); |
| 506 | if (scm_is_false (var)) |
| 507 | SCM_MISC_ERROR ("unbound variable: ~S", scm_list_1 (sym)); |
| 508 | return var; |
| 509 | } |
| 510 | #undef FUNC_NAME |
| 511 | |
| 512 | SCM |
| 513 | scm_c_lookup (const char *name) |
| 514 | { |
| 515 | return scm_lookup (scm_from_locale_symbol (name)); |
| 516 | } |
| 517 | |
| 518 | SCM |
| 519 | scm_lookup (SCM sym) |
| 520 | { |
| 521 | SCM var = |
| 522 | scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_F); |
| 523 | if (scm_is_false (var)) |
| 524 | scm_misc_error ("scm_lookup", "unbound variable: ~S", scm_list_1 (sym)); |
| 525 | return var; |
| 526 | } |
| 527 | |
| 528 | SCM |
| 529 | scm_c_module_define (SCM module, const char *name, SCM value) |
| 530 | { |
| 531 | return scm_module_define (module, scm_from_locale_symbol (name), value); |
| 532 | } |
| 533 | |
| 534 | SCM |
| 535 | scm_module_define (SCM module, SCM sym, SCM value) |
| 536 | #define FUNC_NAME "module-define" |
| 537 | { |
| 538 | SCM var; |
| 539 | SCM_VALIDATE_MODULE (1, module); |
| 540 | |
| 541 | var = scm_sym2var (sym, scm_module_lookup_closure (module), SCM_BOOL_T); |
| 542 | SCM_VARIABLE_SET (var, value); |
| 543 | return var; |
| 544 | } |
| 545 | #undef FUNC_NAME |
| 546 | |
| 547 | SCM |
| 548 | scm_c_define (const char *name, SCM value) |
| 549 | { |
| 550 | return scm_define (scm_from_locale_symbol (name), value); |
| 551 | } |
| 552 | |
| 553 | SCM |
| 554 | scm_define (SCM sym, SCM value) |
| 555 | { |
| 556 | SCM var = |
| 557 | scm_sym2var (sym, scm_current_module_lookup_closure (), SCM_BOOL_T); |
| 558 | SCM_VARIABLE_SET (var, value); |
| 559 | return var; |
| 560 | } |
| 561 | |
| 562 | SCM |
| 563 | scm_module_reverse_lookup (SCM module, SCM variable) |
| 564 | #define FUNC_NAME "module-reverse-lookup" |
| 565 | { |
| 566 | SCM obarray; |
| 567 | long i, n; |
| 568 | |
| 569 | if (scm_is_false (module)) |
| 570 | obarray = scm_pre_modules_obarray; |
| 571 | else |
| 572 | { |
| 573 | SCM_VALIDATE_MODULE (1, module); |
| 574 | obarray = SCM_MODULE_OBARRAY (module); |
| 575 | } |
| 576 | |
| 577 | if (!SCM_HASHTABLE_P (obarray)) |
| 578 | return SCM_BOOL_F; |
| 579 | |
| 580 | /* XXX - We do not use scm_hash_fold here to avoid searching the |
| 581 | whole obarray. We should have a scm_hash_find procedure. */ |
| 582 | |
| 583 | n = SCM_HASHTABLE_N_BUCKETS (obarray); |
| 584 | for (i = 0; i < n; ++i) |
| 585 | { |
| 586 | SCM ls = SCM_HASHTABLE_BUCKET (obarray, i), handle; |
| 587 | while (!scm_is_null (ls)) |
| 588 | { |
| 589 | handle = SCM_CAR (ls); |
| 590 | if (SCM_CDR (handle) == variable) |
| 591 | return SCM_CAR (handle); |
| 592 | ls = SCM_CDR (ls); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | /* Try the `uses' list. |
| 597 | */ |
| 598 | { |
| 599 | SCM uses = SCM_MODULE_USES (module); |
| 600 | while (scm_is_pair (uses)) |
| 601 | { |
| 602 | SCM sym = scm_module_reverse_lookup (SCM_CAR (uses), variable); |
| 603 | if (scm_is_true (sym)) |
| 604 | return sym; |
| 605 | uses = SCM_CDR (uses); |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | return SCM_BOOL_F; |
| 610 | } |
| 611 | #undef FUNC_NAME |
| 612 | |
| 613 | SCM_DEFINE (scm_get_pre_modules_obarray, "%get-pre-modules-obarray", 0, 0, 0, |
| 614 | (), |
| 615 | "Return the obarray that is used for all new bindings before " |
| 616 | "the module system is booted. The first call to " |
| 617 | "@code{set-current-module} will boot the module system.") |
| 618 | #define FUNC_NAME s_scm_get_pre_modules_obarray |
| 619 | { |
| 620 | return scm_pre_modules_obarray; |
| 621 | } |
| 622 | #undef FUNC_NAME |
| 623 | |
| 624 | SCM_SYMBOL (scm_sym_system_module, "system-module"); |
| 625 | |
| 626 | SCM |
| 627 | scm_system_module_env_p (SCM env) |
| 628 | { |
| 629 | SCM proc = scm_env_top_level (env); |
| 630 | if (scm_is_false (proc)) |
| 631 | return SCM_BOOL_T; |
| 632 | return ((scm_is_true (scm_procedure_property (proc, |
| 633 | scm_sym_system_module))) |
| 634 | ? SCM_BOOL_T |
| 635 | : SCM_BOOL_F); |
| 636 | } |
| 637 | |
| 638 | void |
| 639 | scm_modules_prehistory () |
| 640 | { |
| 641 | scm_pre_modules_obarray |
| 642 | = scm_permanent_object (scm_c_make_hash_table (1533)); |
| 643 | } |
| 644 | |
| 645 | void |
| 646 | scm_init_modules () |
| 647 | { |
| 648 | #include "libguile/modules.x" |
| 649 | module_make_local_var_x_var = scm_c_define ("module-make-local-var!", |
| 650 | SCM_UNDEFINED); |
| 651 | scm_tc16_eval_closure = scm_make_smob_type ("eval-closure", 0); |
| 652 | scm_set_smob_mark (scm_tc16_eval_closure, scm_markcdr); |
| 653 | scm_set_smob_apply (scm_tc16_eval_closure, scm_eval_closure_lookup, 2, 0, 0); |
| 654 | |
| 655 | the_module = scm_permanent_object (scm_make_fluid ()); |
| 656 | } |
| 657 | |
| 658 | static void |
| 659 | scm_post_boot_init_modules () |
| 660 | { |
| 661 | #define PERM(x) scm_permanent_object(x) |
| 662 | |
| 663 | SCM module_type = SCM_VARIABLE_REF (scm_c_lookup ("module-type")); |
| 664 | scm_module_tag = (SCM_CELL_WORD_1 (module_type) + scm_tc3_struct); |
| 665 | |
| 666 | resolve_module_var = PERM (scm_c_lookup ("resolve-module")); |
| 667 | process_define_module_var = PERM (scm_c_lookup ("process-define-module")); |
| 668 | process_use_modules_var = PERM (scm_c_lookup ("process-use-modules")); |
| 669 | module_export_x_var = PERM (scm_c_lookup ("module-export!")); |
| 670 | the_root_module_var = PERM (scm_c_lookup ("the-root-module")); |
| 671 | |
| 672 | scm_module_system_booted_p = 1; |
| 673 | } |
| 674 | |
| 675 | /* |
| 676 | Local Variables: |
| 677 | c-file-style: "gnu" |
| 678 | End: |
| 679 | */ |