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db9f0278 | 1 | /* Evaluator for GNU Emacs Lisp interpreter. |
68c45bf0 | 2 | Copyright (C) 1985, 86, 87, 93, 94, 95, 1999 Free Software Foundation, Inc. |
db9f0278 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
96277b2d | 8 | the Free Software Foundation; either version 2, or (at your option) |
db9f0278 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
db9f0278 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
dfcf069d | 23 | |
db9f0278 | 24 | #include "lisp.h" |
9ac0d9e0 | 25 | #include "blockinput.h" |
db9f0278 JB |
26 | |
27 | #ifndef standalone | |
28 | #include "commands.h" | |
1f98fa48 | 29 | #include "keyboard.h" |
db9f0278 JB |
30 | #else |
31 | #define INTERACTIVE 1 | |
32 | #endif | |
33 | ||
34 | #include <setjmp.h> | |
35 | ||
36 | /* This definition is duplicated in alloc.c and keyboard.c */ | |
37 | /* Putting it in lisp.h makes cc bomb out! */ | |
38 | ||
39 | struct backtrace | |
40 | { | |
41 | struct backtrace *next; | |
42 | Lisp_Object *function; | |
43 | Lisp_Object *args; /* Points to vector of args. */ | |
daa37602 JB |
44 | int nargs; /* Length of vector. |
45 | If nargs is UNEVALLED, args points to slot holding | |
46 | list of unevalled args */ | |
db9f0278 JB |
47 | char evalargs; |
48 | /* Nonzero means call value of debugger when done with this operation. */ | |
49 | char debug_on_exit; | |
50 | }; | |
51 | ||
52 | struct backtrace *backtrace_list; | |
53 | ||
82da7701 JB |
54 | /* This structure helps implement the `catch' and `throw' control |
55 | structure. A struct catchtag contains all the information needed | |
56 | to restore the state of the interpreter after a non-local jump. | |
57 | ||
58 | Handlers for error conditions (represented by `struct handler' | |
59 | structures) just point to a catch tag to do the cleanup required | |
60 | for their jumps. | |
61 | ||
62 | catchtag structures are chained together in the C calling stack; | |
63 | the `next' member points to the next outer catchtag. | |
64 | ||
65 | A call like (throw TAG VAL) searches for a catchtag whose `tag' | |
66 | member is TAG, and then unbinds to it. The `val' member is used to | |
67 | hold VAL while the stack is unwound; `val' is returned as the value | |
68 | of the catch form. | |
69 | ||
70 | All the other members are concerned with restoring the interpreter | |
71 | state. */ | |
db9f0278 JB |
72 | struct catchtag |
73 | { | |
74 | Lisp_Object tag; | |
75 | Lisp_Object val; | |
76 | struct catchtag *next; | |
77 | struct gcpro *gcpro; | |
78 | jmp_buf jmp; | |
79 | struct backtrace *backlist; | |
80 | struct handler *handlerlist; | |
81 | int lisp_eval_depth; | |
82 | int pdlcount; | |
83 | int poll_suppress_count; | |
bcf28080 | 84 | struct byte_stack *byte_stack; |
db9f0278 JB |
85 | }; |
86 | ||
87 | struct catchtag *catchlist; | |
88 | ||
15934ffa RS |
89 | #ifdef DEBUG_GCPRO |
90 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
91 | int gcpro_level; | |
92 | #endif | |
93 | ||
db9f0278 | 94 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
ad236261 | 95 | Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag; |
db9f0278 JB |
96 | Lisp_Object Qmocklisp_arguments, Vmocklisp_arguments, Qmocklisp; |
97 | Lisp_Object Qand_rest, Qand_optional; | |
98 | Lisp_Object Qdebug_on_error; | |
99 | ||
6e6e9f08 RS |
100 | /* This holds either the symbol `run-hooks' or nil. |
101 | It is nil at an early stage of startup, and when Emacs | |
102 | is shutting down. */ | |
db9f0278 JB |
103 | Lisp_Object Vrun_hooks; |
104 | ||
105 | /* Non-nil means record all fset's and provide's, to be undone | |
106 | if the file being autoloaded is not fully loaded. | |
107 | They are recorded by being consed onto the front of Vautoload_queue: | |
108 | (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
109 | ||
110 | Lisp_Object Vautoload_queue; | |
111 | ||
112 | /* Current number of specbindings allocated in specpdl. */ | |
113 | int specpdl_size; | |
114 | ||
115 | /* Pointer to beginning of specpdl. */ | |
116 | struct specbinding *specpdl; | |
117 | ||
118 | /* Pointer to first unused element in specpdl. */ | |
119 | struct specbinding *specpdl_ptr; | |
120 | ||
121 | /* Maximum size allowed for specpdl allocation */ | |
122 | int max_specpdl_size; | |
123 | ||
124 | /* Depth in Lisp evaluations and function calls. */ | |
125 | int lisp_eval_depth; | |
126 | ||
127 | /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
128 | int max_lisp_eval_depth; | |
129 | ||
130 | /* Nonzero means enter debugger before next function call */ | |
131 | int debug_on_next_call; | |
132 | ||
128c0f66 | 133 | /* List of conditions (non-nil atom means all) which cause a backtrace |
4de86b16 | 134 | if an error is handled by the command loop's error handler. */ |
128c0f66 | 135 | Lisp_Object Vstack_trace_on_error; |
db9f0278 | 136 | |
128c0f66 | 137 | /* List of conditions (non-nil atom means all) which enter the debugger |
4de86b16 | 138 | if an error is handled by the command loop's error handler. */ |
128c0f66 | 139 | Lisp_Object Vdebug_on_error; |
db9f0278 | 140 | |
fc950e09 KH |
141 | /* List of conditions and regexps specifying error messages which |
142 | do not enter the debugger even if Vdebug_on_errors says they should. */ | |
143 | Lisp_Object Vdebug_ignored_errors; | |
144 | ||
61ede770 | 145 | /* Non-nil means call the debugger even if the error will be handled. */ |
57a6e758 | 146 | Lisp_Object Vdebug_on_signal; |
61ede770 RS |
147 | |
148 | /* Hook for edebug to use. */ | |
149 | Lisp_Object Vsignal_hook_function; | |
150 | ||
db9f0278 | 151 | /* Nonzero means enter debugger if a quit signal |
128c0f66 | 152 | is handled by the command loop's error handler. */ |
db9f0278 JB |
153 | int debug_on_quit; |
154 | ||
be857679 | 155 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 156 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 157 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
158 | know that the debugger itself has an error, and we should just |
159 | signal the error instead of entering an infinite loop of debugger | |
160 | invocations. */ | |
161 | int when_entered_debugger; | |
db9f0278 JB |
162 | |
163 | Lisp_Object Vdebugger; | |
164 | ||
165 | void specbind (), record_unwind_protect (); | |
166 | ||
420e60e6 RS |
167 | Lisp_Object run_hook_with_args (); |
168 | ||
db9f0278 JB |
169 | Lisp_Object funcall_lambda (); |
170 | extern Lisp_Object ml_apply (); /* Apply a mocklisp function to unevaluated argument list */ | |
171 | ||
dfcf069d | 172 | void |
db9f0278 JB |
173 | init_eval_once () |
174 | { | |
175 | specpdl_size = 50; | |
716acfce | 176 | specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding)); |
270e8074 | 177 | specpdl_ptr = specpdl; |
db9f0278 | 178 | max_specpdl_size = 600; |
969f5145 | 179 | max_lisp_eval_depth = 300; |
34d470ba RS |
180 | |
181 | Vrun_hooks = Qnil; | |
db9f0278 JB |
182 | } |
183 | ||
dfcf069d | 184 | void |
db9f0278 JB |
185 | init_eval () |
186 | { | |
187 | specpdl_ptr = specpdl; | |
188 | catchlist = 0; | |
189 | handlerlist = 0; | |
190 | backtrace_list = 0; | |
191 | Vquit_flag = Qnil; | |
192 | debug_on_next_call = 0; | |
193 | lisp_eval_depth = 0; | |
87e21fbd | 194 | #ifdef DEBUG_GCPRO |
15934ffa | 195 | gcpro_level = 0; |
87e21fbd | 196 | #endif |
be857679 | 197 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 198 | when_entered_debugger = -1; |
db9f0278 JB |
199 | } |
200 | ||
201 | Lisp_Object | |
202 | call_debugger (arg) | |
203 | Lisp_Object arg; | |
204 | { | |
205 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
206 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
207 | if (specpdl_size + 40 > max_specpdl_size) | |
208 | max_specpdl_size = specpdl_size + 40; | |
209 | debug_on_next_call = 0; | |
be857679 | 210 | when_entered_debugger = num_nonmacro_input_events; |
db9f0278 JB |
211 | return apply1 (Vdebugger, arg); |
212 | } | |
213 | ||
dfcf069d | 214 | void |
db9f0278 JB |
215 | do_debug_on_call (code) |
216 | Lisp_Object code; | |
217 | { | |
218 | debug_on_next_call = 0; | |
219 | backtrace_list->debug_on_exit = 1; | |
220 | call_debugger (Fcons (code, Qnil)); | |
221 | } | |
222 | \f | |
223 | /* NOTE!!! Every function that can call EVAL must protect its args | |
224 | and temporaries from garbage collection while it needs them. | |
225 | The definition of `For' shows what you have to do. */ | |
226 | ||
227 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
228 | "Eval args until one of them yields non-nil, then return that value.\n\ | |
229 | The remaining args are not evalled at all.\n\ | |
230 | If all args return nil, return nil.") | |
231 | (args) | |
232 | Lisp_Object args; | |
233 | { | |
234 | register Lisp_Object val; | |
235 | Lisp_Object args_left; | |
236 | struct gcpro gcpro1; | |
237 | ||
265a9e55 | 238 | if (NILP(args)) |
db9f0278 JB |
239 | return Qnil; |
240 | ||
241 | args_left = args; | |
242 | GCPRO1 (args_left); | |
243 | ||
244 | do | |
245 | { | |
246 | val = Feval (Fcar (args_left)); | |
265a9e55 | 247 | if (!NILP (val)) |
db9f0278 JB |
248 | break; |
249 | args_left = Fcdr (args_left); | |
250 | } | |
265a9e55 | 251 | while (!NILP(args_left)); |
db9f0278 JB |
252 | |
253 | UNGCPRO; | |
254 | return val; | |
255 | } | |
256 | ||
257 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
258 | "Eval args until one of them yields nil, then return nil.\n\ | |
259 | The remaining args are not evalled at all.\n\ | |
260 | If no arg yields nil, return the last arg's value.") | |
261 | (args) | |
262 | Lisp_Object args; | |
263 | { | |
264 | register Lisp_Object val; | |
265 | Lisp_Object args_left; | |
266 | struct gcpro gcpro1; | |
267 | ||
265a9e55 | 268 | if (NILP(args)) |
db9f0278 JB |
269 | return Qt; |
270 | ||
271 | args_left = args; | |
272 | GCPRO1 (args_left); | |
273 | ||
274 | do | |
275 | { | |
276 | val = Feval (Fcar (args_left)); | |
265a9e55 | 277 | if (NILP (val)) |
db9f0278 JB |
278 | break; |
279 | args_left = Fcdr (args_left); | |
280 | } | |
265a9e55 | 281 | while (!NILP(args_left)); |
db9f0278 JB |
282 | |
283 | UNGCPRO; | |
284 | return val; | |
285 | } | |
286 | ||
287 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
288 | "(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...\n\ | |
289 | Returns the value of THEN or the value of the last of the ELSE's.\n\ | |
290 | THEN must be one expression, but ELSE... can be zero or more expressions.\n\ | |
291 | If COND yields nil, and there are no ELSE's, the value is nil.") | |
292 | (args) | |
293 | Lisp_Object args; | |
294 | { | |
295 | register Lisp_Object cond; | |
296 | struct gcpro gcpro1; | |
297 | ||
298 | GCPRO1 (args); | |
299 | cond = Feval (Fcar (args)); | |
300 | UNGCPRO; | |
301 | ||
265a9e55 | 302 | if (!NILP (cond)) |
db9f0278 JB |
303 | return Feval (Fcar (Fcdr (args))); |
304 | return Fprogn (Fcdr (Fcdr (args))); | |
305 | } | |
306 | ||
307 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
308 | "(cond CLAUSES...): try each clause until one succeeds.\n\ | |
309 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated\n\ | |
310 | and, if the value is non-nil, this clause succeeds:\n\ | |
311 | then the expressions in BODY are evaluated and the last one's\n\ | |
312 | value is the value of the cond-form.\n\ | |
313 | If no clause succeeds, cond returns nil.\n\ | |
314 | If a clause has one element, as in (CONDITION),\n\ | |
315 | CONDITION's value if non-nil is returned from the cond-form.") | |
316 | (args) | |
317 | Lisp_Object args; | |
318 | { | |
319 | register Lisp_Object clause, val; | |
320 | struct gcpro gcpro1; | |
321 | ||
322 | val = Qnil; | |
323 | GCPRO1 (args); | |
265a9e55 | 324 | while (!NILP (args)) |
db9f0278 JB |
325 | { |
326 | clause = Fcar (args); | |
327 | val = Feval (Fcar (clause)); | |
265a9e55 | 328 | if (!NILP (val)) |
db9f0278 | 329 | { |
03699b14 KR |
330 | if (!EQ (XCDR (clause), Qnil)) |
331 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
332 | break; |
333 | } | |
03699b14 | 334 | args = XCDR (args); |
db9f0278 JB |
335 | } |
336 | UNGCPRO; | |
337 | ||
338 | return val; | |
339 | } | |
340 | ||
341 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
342 | "(progn BODY...): eval BODY forms sequentially and return value of last one.") | |
343 | (args) | |
344 | Lisp_Object args; | |
345 | { | |
346 | register Lisp_Object val, tem; | |
347 | Lisp_Object args_left; | |
348 | struct gcpro gcpro1; | |
349 | ||
350 | /* In Mocklisp code, symbols at the front of the progn arglist | |
351 | are to be bound to zero. */ | |
352 | if (!EQ (Vmocklisp_arguments, Qt)) | |
353 | { | |
354 | val = make_number (0); | |
90165123 | 355 | while (!NILP (args) && (tem = Fcar (args), SYMBOLP (tem))) |
db9f0278 JB |
356 | { |
357 | QUIT; | |
358 | specbind (tem, val), args = Fcdr (args); | |
359 | } | |
360 | } | |
361 | ||
265a9e55 | 362 | if (NILP(args)) |
db9f0278 JB |
363 | return Qnil; |
364 | ||
365 | args_left = args; | |
366 | GCPRO1 (args_left); | |
367 | ||
368 | do | |
369 | { | |
370 | val = Feval (Fcar (args_left)); | |
371 | args_left = Fcdr (args_left); | |
372 | } | |
265a9e55 | 373 | while (!NILP(args_left)); |
db9f0278 JB |
374 | |
375 | UNGCPRO; | |
376 | return val; | |
377 | } | |
378 | ||
379 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
380 | "(prog1 FIRST BODY...): eval FIRST and BODY sequentially; value from FIRST.\n\ | |
381 | The value of FIRST is saved during the evaluation of the remaining args,\n\ | |
382 | whose values are discarded.") | |
383 | (args) | |
384 | Lisp_Object args; | |
385 | { | |
386 | Lisp_Object val; | |
387 | register Lisp_Object args_left; | |
388 | struct gcpro gcpro1, gcpro2; | |
389 | register int argnum = 0; | |
390 | ||
265a9e55 | 391 | if (NILP(args)) |
db9f0278 JB |
392 | return Qnil; |
393 | ||
394 | args_left = args; | |
395 | val = Qnil; | |
396 | GCPRO2 (args, val); | |
397 | ||
398 | do | |
399 | { | |
400 | if (!(argnum++)) | |
401 | val = Feval (Fcar (args_left)); | |
402 | else | |
403 | Feval (Fcar (args_left)); | |
404 | args_left = Fcdr (args_left); | |
405 | } | |
265a9e55 | 406 | while (!NILP(args_left)); |
db9f0278 JB |
407 | |
408 | UNGCPRO; | |
409 | return val; | |
410 | } | |
411 | ||
412 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
877b578f | 413 | "(prog2 X Y BODY...): eval X, Y and BODY sequentially; value from Y.\n\ |
db9f0278 JB |
414 | The value of Y is saved during the evaluation of the remaining args,\n\ |
415 | whose values are discarded.") | |
416 | (args) | |
417 | Lisp_Object args; | |
418 | { | |
419 | Lisp_Object val; | |
420 | register Lisp_Object args_left; | |
421 | struct gcpro gcpro1, gcpro2; | |
422 | register int argnum = -1; | |
423 | ||
424 | val = Qnil; | |
425 | ||
87d238ba | 426 | if (NILP (args)) |
db9f0278 JB |
427 | return Qnil; |
428 | ||
429 | args_left = args; | |
430 | val = Qnil; | |
431 | GCPRO2 (args, val); | |
432 | ||
433 | do | |
434 | { | |
435 | if (!(argnum++)) | |
436 | val = Feval (Fcar (args_left)); | |
437 | else | |
438 | Feval (Fcar (args_left)); | |
439 | args_left = Fcdr (args_left); | |
440 | } | |
87d238ba | 441 | while (!NILP (args_left)); |
db9f0278 JB |
442 | |
443 | UNGCPRO; | |
444 | return val; | |
445 | } | |
446 | ||
447 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
448 | "(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.\n\ | |
b0d75191 RS |
449 | The symbols SYM are variables; they are literal (not evaluated).\n\ |
450 | The values VAL are expressions; they are evaluated.\n\ | |
451 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.\n\ | |
452 | The second VAL is not computed until after the first SYM is set, and so on;\n\ | |
453 | each VAL can use the new value of variables set earlier in the `setq'.\n\ | |
196e7d3f | 454 | The return value of the `setq' form is the value of the last VAL.") |
db9f0278 JB |
455 | (args) |
456 | Lisp_Object args; | |
457 | { | |
458 | register Lisp_Object args_left; | |
459 | register Lisp_Object val, sym; | |
460 | struct gcpro gcpro1; | |
461 | ||
265a9e55 | 462 | if (NILP(args)) |
db9f0278 JB |
463 | return Qnil; |
464 | ||
465 | args_left = args; | |
466 | GCPRO1 (args); | |
467 | ||
468 | do | |
469 | { | |
470 | val = Feval (Fcar (Fcdr (args_left))); | |
471 | sym = Fcar (args_left); | |
472 | Fset (sym, val); | |
473 | args_left = Fcdr (Fcdr (args_left)); | |
474 | } | |
265a9e55 | 475 | while (!NILP(args_left)); |
db9f0278 JB |
476 | |
477 | UNGCPRO; | |
478 | return val; | |
479 | } | |
480 | ||
481 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, | |
482 | "Return the argument, without evaluating it. `(quote x)' yields `x'.") | |
483 | (args) | |
484 | Lisp_Object args; | |
485 | { | |
486 | return Fcar (args); | |
487 | } | |
488 | ||
489 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, | |
490 | "Like `quote', but preferred for objects which are functions.\n\ | |
491 | In byte compilation, `function' causes its argument to be compiled.\n\ | |
492 | `quote' cannot do that.") | |
493 | (args) | |
494 | Lisp_Object args; | |
495 | { | |
496 | return Fcar (args); | |
497 | } | |
498 | ||
499 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, | |
500 | "Return t if function in which this appears was called interactively.\n\ | |
501 | This means that the function was called with call-interactively (which\n\ | |
502 | includes being called as the binding of a key)\n\ | |
503 | and input is currently coming from the keyboard (not in keyboard macro).") | |
504 | () | |
505 | { | |
506 | register struct backtrace *btp; | |
507 | register Lisp_Object fun; | |
508 | ||
509 | if (!INTERACTIVE) | |
510 | return Qnil; | |
511 | ||
db9f0278 | 512 | btp = backtrace_list; |
daa37602 JB |
513 | |
514 | /* If this isn't a byte-compiled function, there may be a frame at | |
515 | the top for Finteractive_p itself. If so, skip it. */ | |
516 | fun = Findirect_function (*btp->function); | |
0598f773 | 517 | if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) |
db9f0278 | 518 | btp = btp->next; |
daa37602 JB |
519 | |
520 | /* If we're running an Emacs 18-style byte-compiled function, there | |
521 | may be a frame for Fbytecode. Now, given the strictest | |
522 | definition, this function isn't really being called | |
523 | interactively, but because that's the way Emacs 18 always builds | |
524 | byte-compiled functions, we'll accept it for now. */ | |
525 | if (EQ (*btp->function, Qbytecode)) | |
526 | btp = btp->next; | |
527 | ||
528 | /* If this isn't a byte-compiled function, then we may now be | |
529 | looking at several frames for special forms. Skip past them. */ | |
530 | while (btp && | |
531 | btp->nargs == UNEVALLED) | |
a6e3fa71 JB |
532 | btp = btp->next; |
533 | ||
daa37602 JB |
534 | /* btp now points at the frame of the innermost function that isn't |
535 | a special form, ignoring frames for Finteractive_p and/or | |
536 | Fbytecode at the top. If this frame is for a built-in function | |
537 | (such as load or eval-region) return nil. */ | |
ffd56f97 | 538 | fun = Findirect_function (*btp->function); |
90165123 | 539 | if (SUBRP (fun)) |
db9f0278 JB |
540 | return Qnil; |
541 | /* btp points to the frame of a Lisp function that called interactive-p. | |
542 | Return t if that function was called interactively. */ | |
543 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
544 | return Qt; | |
545 | return Qnil; | |
546 | } | |
547 | ||
548 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, | |
549 | "(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.\n\ | |
550 | The definition is (lambda ARGLIST [DOCSTRING] BODY...).\n\ | |
551 | See also the function `interactive'.") | |
552 | (args) | |
553 | Lisp_Object args; | |
554 | { | |
555 | register Lisp_Object fn_name; | |
556 | register Lisp_Object defn; | |
557 | ||
558 | fn_name = Fcar (args); | |
559 | defn = Fcons (Qlambda, Fcdr (args)); | |
265a9e55 | 560 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
561 | defn = Fpurecopy (defn); |
562 | Ffset (fn_name, defn); | |
2a49b6e5 | 563 | LOADHIST_ATTACH (fn_name); |
db9f0278 JB |
564 | return fn_name; |
565 | } | |
566 | ||
567 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
568 | "(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.\n\ | |
569 | The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).\n\ | |
570 | When the macro is called, as in (NAME ARGS...),\n\ | |
571 | the function (lambda ARGLIST BODY...) is applied to\n\ | |
572 | the list ARGS... as it appears in the expression,\n\ | |
573 | and the result should be a form to be evaluated instead of the original.") | |
574 | (args) | |
575 | Lisp_Object args; | |
576 | { | |
577 | register Lisp_Object fn_name; | |
578 | register Lisp_Object defn; | |
579 | ||
580 | fn_name = Fcar (args); | |
581 | defn = Fcons (Qmacro, Fcons (Qlambda, Fcdr (args))); | |
265a9e55 | 582 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
583 | defn = Fpurecopy (defn); |
584 | Ffset (fn_name, defn); | |
2a49b6e5 | 585 | LOADHIST_ATTACH (fn_name); |
db9f0278 JB |
586 | return fn_name; |
587 | } | |
588 | ||
589 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, | |
590 | "(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.\n\ | |
591 | You are not required to define a variable in order to use it,\n\ | |
592 | but the definition can supply documentation and an initial value\n\ | |
593 | in a way that tags can recognize.\n\n\ | |
594 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void.\n\ | |
06ef7355 RS |
595 | If SYMBOL is buffer-local, its default value is what is set;\n\ |
596 | buffer-local values are not affected.\n\ | |
db9f0278 JB |
597 | INITVALUE and DOCSTRING are optional.\n\ |
598 | If DOCSTRING starts with *, this variable is identified as a user option.\n\ | |
599 | This means that M-x set-variable and M-x edit-options recognize it.\n\ | |
600 | If INITVALUE is missing, SYMBOL's value is not set.") | |
601 | (args) | |
602 | Lisp_Object args; | |
603 | { | |
a42ba017 | 604 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
605 | |
606 | sym = Fcar (args); | |
a42ba017 RS |
607 | tail = Fcdr (args); |
608 | if (!NILP (Fcdr (Fcdr (tail)))) | |
609 | error ("too many arguments"); | |
610 | ||
611 | if (!NILP (tail)) | |
db9f0278 JB |
612 | { |
613 | tem = Fdefault_boundp (sym); | |
265a9e55 | 614 | if (NILP (tem)) |
db9f0278 JB |
615 | Fset_default (sym, Feval (Fcar (Fcdr (args)))); |
616 | } | |
a42ba017 RS |
617 | tail = Fcdr (Fcdr (args)); |
618 | if (!NILP (Fcar (tail))) | |
db9f0278 | 619 | { |
ca248607 | 620 | tem = Fcar (tail); |
265a9e55 | 621 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
622 | tem = Fpurecopy (tem); |
623 | Fput (sym, Qvariable_documentation, tem); | |
624 | } | |
2a49b6e5 | 625 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
626 | return sym; |
627 | } | |
628 | ||
629 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
630 | "(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant variable.\n\ | |
c569512a | 631 | The intent is that neither programs nor users should ever change this value.\n\ |
db9f0278 | 632 | Always sets the value of SYMBOL to the result of evalling INITVALUE.\n\ |
06ef7355 RS |
633 | If SYMBOL is buffer-local, its default value is what is set;\n\ |
634 | buffer-local values are not affected.\n\ | |
701b1ec2 | 635 | DOCSTRING is optional.") |
db9f0278 JB |
636 | (args) |
637 | Lisp_Object args; | |
638 | { | |
639 | register Lisp_Object sym, tem; | |
640 | ||
641 | sym = Fcar (args); | |
a42ba017 RS |
642 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
643 | error ("too many arguments"); | |
644 | ||
db9f0278 JB |
645 | Fset_default (sym, Feval (Fcar (Fcdr (args)))); |
646 | tem = Fcar (Fcdr (Fcdr (args))); | |
265a9e55 | 647 | if (!NILP (tem)) |
db9f0278 | 648 | { |
265a9e55 | 649 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
650 | tem = Fpurecopy (tem); |
651 | Fput (sym, Qvariable_documentation, tem); | |
652 | } | |
2a49b6e5 | 653 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
654 | return sym; |
655 | } | |
656 | ||
657 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, | |
658 | "Returns t if VARIABLE is intended to be set and modified by users.\n\ | |
659 | \(The alternative is a variable used internally in a Lisp program.)\n\ | |
660 | Determined by whether the first character of the documentation\n\ | |
65411977 | 661 | for the variable is `*'.") |
db9f0278 JB |
662 | (variable) |
663 | Lisp_Object variable; | |
664 | { | |
665 | Lisp_Object documentation; | |
666 | ||
5e78e475 RS |
667 | if (!SYMBOLP (variable)) |
668 | return Qnil; | |
669 | ||
db9f0278 | 670 | documentation = Fget (variable, Qvariable_documentation); |
90165123 | 671 | if (INTEGERP (documentation) && XINT (documentation) < 0) |
db9f0278 | 672 | return Qt; |
65411977 RS |
673 | if (STRINGP (documentation) |
674 | && ((unsigned char) XSTRING (documentation)->data[0] == '*')) | |
675 | return Qt; | |
676 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
677 | if (CONSP (documentation) | |
03699b14 KR |
678 | && STRINGP (XCAR (documentation)) |
679 | && INTEGERP (XCDR (documentation)) | |
680 | && XINT (XCDR (documentation)) < 0) | |
db9f0278 JB |
681 | return Qt; |
682 | return Qnil; | |
683 | } | |
684 | \f | |
685 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
686 | "(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.\n\ | |
687 | The value of the last form in BODY is returned.\n\ | |
688 | Each element of VARLIST is a symbol (which is bound to nil)\n\ | |
689 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\ | |
690 | Each VALUEFORM can refer to the symbols already bound by this VARLIST.") | |
691 | (args) | |
692 | Lisp_Object args; | |
693 | { | |
694 | Lisp_Object varlist, val, elt; | |
695 | int count = specpdl_ptr - specpdl; | |
696 | struct gcpro gcpro1, gcpro2, gcpro3; | |
697 | ||
698 | GCPRO3 (args, elt, varlist); | |
699 | ||
700 | varlist = Fcar (args); | |
265a9e55 | 701 | while (!NILP (varlist)) |
db9f0278 JB |
702 | { |
703 | QUIT; | |
704 | elt = Fcar (varlist); | |
90165123 | 705 | if (SYMBOLP (elt)) |
db9f0278 | 706 | specbind (elt, Qnil); |
08564963 JB |
707 | else if (! NILP (Fcdr (Fcdr (elt)))) |
708 | Fsignal (Qerror, | |
709 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
710 | elt)); | |
db9f0278 JB |
711 | else |
712 | { | |
713 | val = Feval (Fcar (Fcdr (elt))); | |
714 | specbind (Fcar (elt), val); | |
715 | } | |
716 | varlist = Fcdr (varlist); | |
717 | } | |
718 | UNGCPRO; | |
719 | val = Fprogn (Fcdr (args)); | |
720 | return unbind_to (count, val); | |
721 | } | |
722 | ||
723 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
724 | "(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.\n\ | |
725 | The value of the last form in BODY is returned.\n\ | |
726 | Each element of VARLIST is a symbol (which is bound to nil)\n\ | |
727 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\ | |
728 | All the VALUEFORMs are evalled before any symbols are bound.") | |
729 | (args) | |
730 | Lisp_Object args; | |
731 | { | |
732 | Lisp_Object *temps, tem; | |
733 | register Lisp_Object elt, varlist; | |
734 | int count = specpdl_ptr - specpdl; | |
735 | register int argnum; | |
736 | struct gcpro gcpro1, gcpro2; | |
737 | ||
738 | varlist = Fcar (args); | |
739 | ||
740 | /* Make space to hold the values to give the bound variables */ | |
741 | elt = Flength (varlist); | |
742 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
743 | ||
744 | /* Compute the values and store them in `temps' */ | |
745 | ||
746 | GCPRO2 (args, *temps); | |
747 | gcpro2.nvars = 0; | |
748 | ||
265a9e55 | 749 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
750 | { |
751 | QUIT; | |
752 | elt = Fcar (varlist); | |
90165123 | 753 | if (SYMBOLP (elt)) |
db9f0278 | 754 | temps [argnum++] = Qnil; |
08564963 JB |
755 | else if (! NILP (Fcdr (Fcdr (elt)))) |
756 | Fsignal (Qerror, | |
757 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
758 | elt)); | |
db9f0278 JB |
759 | else |
760 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
761 | gcpro2.nvars = argnum; | |
762 | } | |
763 | UNGCPRO; | |
764 | ||
765 | varlist = Fcar (args); | |
265a9e55 | 766 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
767 | { |
768 | elt = Fcar (varlist); | |
769 | tem = temps[argnum++]; | |
90165123 | 770 | if (SYMBOLP (elt)) |
db9f0278 JB |
771 | specbind (elt, tem); |
772 | else | |
773 | specbind (Fcar (elt), tem); | |
774 | } | |
775 | ||
776 | elt = Fprogn (Fcdr (args)); | |
777 | return unbind_to (count, elt); | |
778 | } | |
779 | ||
780 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
781 | "(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.\n\ | |
782 | The order of execution is thus TEST, BODY, TEST, BODY and so on\n\ | |
783 | until TEST returns nil.") | |
784 | (args) | |
785 | Lisp_Object args; | |
786 | { | |
787 | Lisp_Object test, body, tem; | |
788 | struct gcpro gcpro1, gcpro2; | |
789 | ||
790 | GCPRO2 (test, body); | |
791 | ||
792 | test = Fcar (args); | |
793 | body = Fcdr (args); | |
e3c24a74 RS |
794 | while (tem = Feval (test), |
795 | (!EQ (Vmocklisp_arguments, Qt) ? XINT (tem) : !NILP (tem))) | |
db9f0278 JB |
796 | { |
797 | QUIT; | |
798 | Fprogn (body); | |
799 | } | |
800 | ||
801 | UNGCPRO; | |
802 | return Qnil; | |
803 | } | |
804 | ||
805 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
806 | "Return result of expanding macros at top level of FORM.\n\ | |
807 | If FORM is not a macro call, it is returned unchanged.\n\ | |
808 | Otherwise, the macro is expanded and the expansion is considered\n\ | |
809 | in place of FORM. When a non-macro-call results, it is returned.\n\n\ | |
810 | The second optional arg ENVIRONMENT species an environment of macro\n\ | |
811 | definitions to shadow the loaded ones for use in file byte-compilation.") | |
79e8bfbf | 812 | (form, environment) |
2e267a2e | 813 | Lisp_Object form; |
79e8bfbf | 814 | Lisp_Object environment; |
db9f0278 | 815 | { |
23d6b5a6 | 816 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
817 | register Lisp_Object expander, sym, def, tem; |
818 | ||
819 | while (1) | |
820 | { | |
821 | /* Come back here each time we expand a macro call, | |
822 | in case it expands into another macro call. */ | |
90165123 | 823 | if (!CONSP (form)) |
db9f0278 | 824 | break; |
23d6b5a6 | 825 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 826 | def = sym = XCAR (form); |
23d6b5a6 | 827 | tem = Qnil; |
db9f0278 JB |
828 | /* Trace symbols aliases to other symbols |
829 | until we get a symbol that is not an alias. */ | |
90165123 | 830 | while (SYMBOLP (def)) |
db9f0278 JB |
831 | { |
832 | QUIT; | |
23d6b5a6 | 833 | sym = def; |
79e8bfbf | 834 | tem = Fassq (sym, environment); |
265a9e55 | 835 | if (NILP (tem)) |
db9f0278 JB |
836 | { |
837 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
838 | if (!EQ (def, Qunbound)) |
839 | continue; | |
db9f0278 | 840 | } |
23d6b5a6 | 841 | break; |
db9f0278 | 842 | } |
79e8bfbf | 843 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 844 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 845 | if (NILP (tem)) |
db9f0278 | 846 | { |
79e8bfbf | 847 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 848 | Look at its function definition. */ |
90165123 | 849 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
850 | /* Not defined or definition not suitable */ |
851 | break; | |
03699b14 | 852 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
853 | { |
854 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 855 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 856 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
857 | /* Yes, load it and try again. */ |
858 | { | |
ca20916b RS |
859 | struct gcpro gcpro1; |
860 | GCPRO1 (form); | |
ee9ee63c | 861 | do_autoload (def, sym); |
ca20916b | 862 | UNGCPRO; |
ee9ee63c JB |
863 | continue; |
864 | } | |
865 | else | |
db9f0278 | 866 | break; |
db9f0278 | 867 | } |
03699b14 | 868 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 869 | break; |
03699b14 | 870 | else expander = XCDR (def); |
db9f0278 JB |
871 | } |
872 | else | |
873 | { | |
03699b14 | 874 | expander = XCDR (tem); |
265a9e55 | 875 | if (NILP (expander)) |
db9f0278 JB |
876 | break; |
877 | } | |
03699b14 | 878 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
879 | } |
880 | return form; | |
881 | } | |
882 | \f | |
883 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
884 | "(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.\n\ | |
4e306308 RS |
885 | TAG is evalled to get the tag to use; it must not be nil.\n\ |
886 | \n\ | |
887 | Then the BODY is executed.\n\ | |
db9f0278 JB |
888 | Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.\n\ |
889 | If no throw happens, `catch' returns the value of the last BODY form.\n\ | |
890 | If a throw happens, it specifies the value to return from `catch'.") | |
891 | (args) | |
892 | Lisp_Object args; | |
893 | { | |
894 | register Lisp_Object tag; | |
895 | struct gcpro gcpro1; | |
896 | ||
897 | GCPRO1 (args); | |
898 | tag = Feval (Fcar (args)); | |
899 | UNGCPRO; | |
900 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
901 | } | |
902 | ||
903 | /* Set up a catch, then call C function FUNC on argument ARG. | |
904 | FUNC should return a Lisp_Object. | |
905 | This is how catches are done from within C code. */ | |
906 | ||
907 | Lisp_Object | |
908 | internal_catch (tag, func, arg) | |
909 | Lisp_Object tag; | |
910 | Lisp_Object (*func) (); | |
911 | Lisp_Object arg; | |
912 | { | |
913 | /* This structure is made part of the chain `catchlist'. */ | |
914 | struct catchtag c; | |
915 | ||
916 | /* Fill in the components of c, and put it on the list. */ | |
917 | c.next = catchlist; | |
918 | c.tag = tag; | |
919 | c.val = Qnil; | |
920 | c.backlist = backtrace_list; | |
921 | c.handlerlist = handlerlist; | |
922 | c.lisp_eval_depth = lisp_eval_depth; | |
923 | c.pdlcount = specpdl_ptr - specpdl; | |
924 | c.poll_suppress_count = poll_suppress_count; | |
925 | c.gcpro = gcprolist; | |
bcf28080 | 926 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
927 | catchlist = &c; |
928 | ||
929 | /* Call FUNC. */ | |
930 | if (! _setjmp (c.jmp)) | |
931 | c.val = (*func) (arg); | |
932 | ||
933 | /* Throw works by a longjmp that comes right here. */ | |
934 | catchlist = c.next; | |
935 | return c.val; | |
936 | } | |
937 | ||
ba410f40 JB |
938 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
939 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 940 | |
ba410f40 JB |
941 | This is the guts Fthrow and Fsignal; they differ only in the way |
942 | they choose the catch tag to throw to. A catch tag for a | |
943 | condition-case form has a TAG of Qnil. | |
db9f0278 | 944 | |
ba410f40 JB |
945 | Before each catch is discarded, unbind all special bindings and |
946 | execute all unwind-protect clauses made above that catch. Unwind | |
947 | the handler stack as we go, so that the proper handlers are in | |
948 | effect for each unwind-protect clause we run. At the end, restore | |
949 | some static info saved in CATCH, and longjmp to the location | |
950 | specified in the | |
951 | ||
952 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
953 | |
954 | static void | |
ba410f40 | 955 | unwind_to_catch (catch, value) |
db9f0278 | 956 | struct catchtag *catch; |
ba410f40 | 957 | Lisp_Object value; |
db9f0278 JB |
958 | { |
959 | register int last_time; | |
960 | ||
ba410f40 JB |
961 | /* Save the value in the tag. */ |
962 | catch->val = value; | |
963 | ||
82da7701 | 964 | /* Restore the polling-suppression count. */ |
1cdc3155 | 965 | set_poll_suppress_count (catch->poll_suppress_count); |
82da7701 | 966 | |
db9f0278 JB |
967 | do |
968 | { | |
969 | last_time = catchlist == catch; | |
82da7701 JB |
970 | |
971 | /* Unwind the specpdl stack, and then restore the proper set of | |
972 | handlers. */ | |
db9f0278 JB |
973 | unbind_to (catchlist->pdlcount, Qnil); |
974 | handlerlist = catchlist->handlerlist; | |
975 | catchlist = catchlist->next; | |
976 | } | |
977 | while (! last_time); | |
978 | ||
bcf28080 | 979 | byte_stack_list = catch->byte_stack; |
db9f0278 | 980 | gcprolist = catch->gcpro; |
15934ffa RS |
981 | #ifdef DEBUG_GCPRO |
982 | if (gcprolist != 0) | |
983 | gcpro_level = gcprolist->level + 1; | |
984 | else | |
985 | gcpro_level = 0; | |
986 | #endif | |
db9f0278 JB |
987 | backtrace_list = catch->backlist; |
988 | lisp_eval_depth = catch->lisp_eval_depth; | |
ba410f40 JB |
989 | |
990 | _longjmp (catch->jmp, 1); | |
db9f0278 JB |
991 | } |
992 | ||
993 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
994 | "(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.\n\ | |
995 | Both TAG and VALUE are evalled.") | |
79e8bfbf EN |
996 | (tag, value) |
997 | register Lisp_Object tag, value; | |
db9f0278 JB |
998 | { |
999 | register struct catchtag *c; | |
1000 | ||
1001 | while (1) | |
1002 | { | |
265a9e55 | 1003 | if (!NILP (tag)) |
db9f0278 JB |
1004 | for (c = catchlist; c; c = c->next) |
1005 | { | |
1006 | if (EQ (c->tag, tag)) | |
79e8bfbf | 1007 | unwind_to_catch (c, value); |
db9f0278 | 1008 | } |
79e8bfbf | 1009 | tag = Fsignal (Qno_catch, Fcons (tag, Fcons (value, Qnil))); |
db9f0278 JB |
1010 | } |
1011 | } | |
1012 | ||
1013 | ||
1014 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
1015 | "Do BODYFORM, protecting with UNWINDFORMS.\n\ | |
1016 | Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).\n\ | |
1017 | If BODYFORM completes normally, its value is returned\n\ | |
1018 | after executing the UNWINDFORMS.\n\ | |
1019 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.") | |
1020 | (args) | |
1021 | Lisp_Object args; | |
1022 | { | |
1023 | Lisp_Object val; | |
1024 | int count = specpdl_ptr - specpdl; | |
1025 | ||
1026 | record_unwind_protect (0, Fcdr (args)); | |
1027 | val = Feval (Fcar (args)); | |
1028 | return unbind_to (count, val); | |
1029 | } | |
1030 | \f | |
1031 | /* Chain of condition handlers currently in effect. | |
1032 | The elements of this chain are contained in the stack frames | |
1033 | of Fcondition_case and internal_condition_case. | |
1034 | When an error is signaled (by calling Fsignal, below), | |
1035 | this chain is searched for an element that applies. */ | |
1036 | ||
1037 | struct handler *handlerlist; | |
1038 | ||
1039 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
1040 | "Regain control when an error is signaled.\n\ | |
1041 | Usage looks like (condition-case VAR BODYFORM HANDLERS...).\n\ | |
1042 | executes BODYFORM and returns its value if no error happens.\n\ | |
1043 | Each element of HANDLERS looks like (CONDITION-NAME BODY...)\n\ | |
1044 | where the BODY is made of Lisp expressions.\n\n\ | |
1045 | A handler is applicable to an error\n\ | |
1046 | if CONDITION-NAME is one of the error's condition names.\n\ | |
1047 | If an error happens, the first applicable handler is run.\n\ | |
1048 | \n\ | |
633357d4 RS |
1049 | The car of a handler may be a list of condition names\n\ |
1050 | instead of a single condition name.\n\ | |
1051 | \n\ | |
db9f0278 JB |
1052 | When a handler handles an error,\n\ |
1053 | control returns to the condition-case and the handler BODY... is executed\n\ | |
1054 | with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).\n\ | |
1055 | VAR may be nil; then you do not get access to the signal information.\n\ | |
1056 | \n\ | |
1057 | The value of the last BODY form is returned from the condition-case.\n\ | |
1058 | See also the function `signal' for more info.") | |
1059 | (args) | |
1060 | Lisp_Object args; | |
1061 | { | |
1062 | Lisp_Object val; | |
1063 | struct catchtag c; | |
1064 | struct handler h; | |
82da7701 | 1065 | register Lisp_Object var, bodyform, handlers; |
db9f0278 | 1066 | |
82da7701 JB |
1067 | var = Fcar (args); |
1068 | bodyform = Fcar (Fcdr (args)); | |
1069 | handlers = Fcdr (Fcdr (args)); | |
1070 | CHECK_SYMBOL (var, 0); | |
1071 | ||
1072 | for (val = handlers; ! NILP (val); val = Fcdr (val)) | |
1073 | { | |
1074 | Lisp_Object tem; | |
1075 | tem = Fcar (val); | |
5f96776a RS |
1076 | if (! (NILP (tem) |
1077 | || (CONSP (tem) | |
03699b14 KR |
1078 | && (SYMBOLP (XCAR (tem)) |
1079 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1080 | error ("Invalid condition handler", tem); |
1081 | } | |
db9f0278 JB |
1082 | |
1083 | c.tag = Qnil; | |
1084 | c.val = Qnil; | |
1085 | c.backlist = backtrace_list; | |
1086 | c.handlerlist = handlerlist; | |
1087 | c.lisp_eval_depth = lisp_eval_depth; | |
1088 | c.pdlcount = specpdl_ptr - specpdl; | |
1089 | c.poll_suppress_count = poll_suppress_count; | |
1090 | c.gcpro = gcprolist; | |
bcf28080 | 1091 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1092 | if (_setjmp (c.jmp)) |
1093 | { | |
265a9e55 | 1094 | if (!NILP (h.var)) |
9d58218c RS |
1095 | specbind (h.var, c.val); |
1096 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1097 | |
1098 | /* Note that this just undoes the binding of h.var; whoever | |
1099 | longjumped to us unwound the stack to c.pdlcount before | |
1100 | throwing. */ | |
db9f0278 JB |
1101 | unbind_to (c.pdlcount, Qnil); |
1102 | return val; | |
1103 | } | |
1104 | c.next = catchlist; | |
1105 | catchlist = &c; | |
db9f0278 | 1106 | |
82da7701 JB |
1107 | h.var = var; |
1108 | h.handler = handlers; | |
db9f0278 | 1109 | h.next = handlerlist; |
db9f0278 JB |
1110 | h.tag = &c; |
1111 | handlerlist = &h; | |
1112 | ||
82da7701 | 1113 | val = Feval (bodyform); |
db9f0278 JB |
1114 | catchlist = c.next; |
1115 | handlerlist = h.next; | |
1116 | return val; | |
1117 | } | |
1118 | ||
f029ca5f RS |
1119 | /* Call the function BFUN with no arguments, catching errors within it |
1120 | according to HANDLERS. If there is an error, call HFUN with | |
1121 | one argument which is the data that describes the error: | |
1122 | (SIGNALNAME . DATA) | |
1123 | ||
1124 | HANDLERS can be a list of conditions to catch. | |
1125 | If HANDLERS is Qt, catch all errors. | |
1126 | If HANDLERS is Qerror, catch all errors | |
1127 | but allow the debugger to run if that is enabled. */ | |
1128 | ||
db9f0278 JB |
1129 | Lisp_Object |
1130 | internal_condition_case (bfun, handlers, hfun) | |
1131 | Lisp_Object (*bfun) (); | |
1132 | Lisp_Object handlers; | |
1133 | Lisp_Object (*hfun) (); | |
1134 | { | |
1135 | Lisp_Object val; | |
1136 | struct catchtag c; | |
1137 | struct handler h; | |
1138 | ||
01591d17 RS |
1139 | /* Since Fsignal resets this to 0, it had better be 0 now |
1140 | or else we have a potential bug. */ | |
1141 | if (interrupt_input_blocked != 0) | |
1142 | abort (); | |
1143 | ||
db9f0278 JB |
1144 | c.tag = Qnil; |
1145 | c.val = Qnil; | |
1146 | c.backlist = backtrace_list; | |
1147 | c.handlerlist = handlerlist; | |
1148 | c.lisp_eval_depth = lisp_eval_depth; | |
1149 | c.pdlcount = specpdl_ptr - specpdl; | |
1150 | c.poll_suppress_count = poll_suppress_count; | |
1151 | c.gcpro = gcprolist; | |
bcf28080 | 1152 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1153 | if (_setjmp (c.jmp)) |
1154 | { | |
9d58218c | 1155 | return (*hfun) (c.val); |
db9f0278 JB |
1156 | } |
1157 | c.next = catchlist; | |
1158 | catchlist = &c; | |
1159 | h.handler = handlers; | |
1160 | h.var = Qnil; | |
db9f0278 JB |
1161 | h.next = handlerlist; |
1162 | h.tag = &c; | |
1163 | handlerlist = &h; | |
1164 | ||
1165 | val = (*bfun) (); | |
1166 | catchlist = c.next; | |
1167 | handlerlist = h.next; | |
1168 | return val; | |
1169 | } | |
1170 | ||
f029ca5f RS |
1171 | /* Like internal_condition_case but call HFUN with ARG as its argument. */ |
1172 | ||
d227775c RS |
1173 | Lisp_Object |
1174 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1175 | Lisp_Object (*bfun) (); | |
1176 | Lisp_Object arg; | |
1177 | Lisp_Object handlers; | |
1178 | Lisp_Object (*hfun) (); | |
1179 | { | |
1180 | Lisp_Object val; | |
1181 | struct catchtag c; | |
1182 | struct handler h; | |
1183 | ||
1184 | c.tag = Qnil; | |
1185 | c.val = Qnil; | |
1186 | c.backlist = backtrace_list; | |
1187 | c.handlerlist = handlerlist; | |
1188 | c.lisp_eval_depth = lisp_eval_depth; | |
1189 | c.pdlcount = specpdl_ptr - specpdl; | |
1190 | c.poll_suppress_count = poll_suppress_count; | |
1191 | c.gcpro = gcprolist; | |
bcf28080 | 1192 | c.byte_stack = byte_stack_list; |
d227775c RS |
1193 | if (_setjmp (c.jmp)) |
1194 | { | |
9d58218c | 1195 | return (*hfun) (c.val); |
d227775c RS |
1196 | } |
1197 | c.next = catchlist; | |
1198 | catchlist = &c; | |
1199 | h.handler = handlers; | |
1200 | h.var = Qnil; | |
1201 | h.next = handlerlist; | |
1202 | h.tag = &c; | |
1203 | handlerlist = &h; | |
1204 | ||
1205 | val = (*bfun) (arg); | |
1206 | catchlist = c.next; | |
1207 | handlerlist = h.next; | |
1208 | return val; | |
1209 | } | |
1210 | \f | |
db9f0278 JB |
1211 | static Lisp_Object find_handler_clause (); |
1212 | ||
1213 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
4200e719 | 1214 | "Signal an error. Args are ERROR-SYMBOL and associated DATA.\n\ |
db9f0278 | 1215 | This function does not return.\n\n\ |
4200e719 | 1216 | An error symbol is a symbol with an `error-conditions' property\n\ |
db9f0278 JB |
1217 | that is a list of condition names.\n\ |
1218 | A handler for any of those names will get to handle this signal.\n\ | |
1219 | The symbol `error' should normally be one of them.\n\ | |
1220 | \n\ | |
1221 | DATA should be a list. Its elements are printed as part of the error message.\n\ | |
1222 | If the signal is handled, DATA is made available to the handler.\n\ | |
1223 | See also the function `condition-case'.") | |
4200e719 RS |
1224 | (error_symbol, data) |
1225 | Lisp_Object error_symbol, data; | |
db9f0278 | 1226 | { |
bfa8ca43 AS |
1227 | /* When memory is full, ERROR-SYMBOL is nil, |
1228 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). */ | |
db9f0278 JB |
1229 | register struct handler *allhandlers = handlerlist; |
1230 | Lisp_Object conditions; | |
1231 | extern int gc_in_progress; | |
1232 | extern int waiting_for_input; | |
1233 | Lisp_Object debugger_value; | |
c11d3d17 | 1234 | Lisp_Object string; |
1ea9dec4 | 1235 | Lisp_Object real_error_symbol; |
48f8dfa3 | 1236 | extern int display_busy_cursor_p; |
db9f0278 | 1237 | |
db9f0278 JB |
1238 | immediate_quit = 0; |
1239 | if (gc_in_progress || waiting_for_input) | |
1240 | abort (); | |
1241 | ||
1242 | TOTALLY_UNBLOCK_INPUT; | |
1243 | ||
1ea9dec4 RS |
1244 | if (NILP (error_symbol)) |
1245 | real_error_symbol = Fcar (data); | |
1246 | else | |
1247 | real_error_symbol = error_symbol; | |
1248 | ||
48f8dfa3 GM |
1249 | #ifdef HAVE_X_WINDOWS |
1250 | if (display_busy_cursor_p) | |
1251 | Fx_hide_busy_cursor (Qt); | |
1252 | #endif | |
48f8dfa3 | 1253 | |
61ede770 RS |
1254 | /* This hook is used by edebug. */ |
1255 | if (! NILP (Vsignal_hook_function)) | |
f01a9c5b | 1256 | call2 (Vsignal_hook_function, error_symbol, data); |
61ede770 | 1257 | |
1ea9dec4 | 1258 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 JB |
1259 | |
1260 | for (; handlerlist; handlerlist = handlerlist->next) | |
1261 | { | |
1262 | register Lisp_Object clause; | |
1263 | clause = find_handler_clause (handlerlist->handler, conditions, | |
4200e719 | 1264 | error_symbol, data, &debugger_value); |
db9f0278 JB |
1265 | |
1266 | #if 0 /* Most callers are not prepared to handle gc if this returns. | |
1267 | So, since this feature is not very useful, take it out. */ | |
1268 | /* If have called debugger and user wants to continue, | |
1269 | just return nil. */ | |
1270 | if (EQ (clause, Qlambda)) | |
1271 | return debugger_value; | |
1272 | #else | |
1273 | if (EQ (clause, Qlambda)) | |
82da7701 | 1274 | { |
690337b7 KH |
1275 | /* We can't return values to code which signaled an error, but we |
1276 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1277 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1278 | return Qnil; |
1279 | else | |
d3e6f8be | 1280 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1281 | } |
db9f0278 JB |
1282 | #endif |
1283 | ||
265a9e55 | 1284 | if (!NILP (clause)) |
db9f0278 | 1285 | { |
9d58218c | 1286 | Lisp_Object unwind_data; |
db9f0278 | 1287 | struct handler *h = handlerlist; |
9d58218c | 1288 | |
db9f0278 | 1289 | handlerlist = allhandlers; |
1ea9dec4 RS |
1290 | |
1291 | if (NILP (error_symbol)) | |
1292 | unwind_data = data; | |
9d58218c RS |
1293 | else |
1294 | unwind_data = Fcons (error_symbol, data); | |
1295 | h->chosen_clause = clause; | |
1296 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1297 | } |
1298 | } | |
1299 | ||
1300 | handlerlist = allhandlers; | |
1301 | /* If no handler is present now, try to run the debugger, | |
1302 | and if that fails, throw to top level. */ | |
4200e719 | 1303 | find_handler_clause (Qerror, conditions, error_symbol, data, &debugger_value); |
c11d3d17 RS |
1304 | if (catchlist != 0) |
1305 | Fthrow (Qtop_level, Qt); | |
1306 | ||
1ea9dec4 | 1307 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1308 | data = Fcons (error_symbol, data); |
1309 | ||
1310 | string = Ferror_message_string (data); | |
377127ce | 1311 | fatal ("%s", XSTRING (string)->data, 0); |
db9f0278 JB |
1312 | } |
1313 | ||
128c0f66 RM |
1314 | /* Return nonzero iff LIST is a non-nil atom or |
1315 | a list containing one of CONDITIONS. */ | |
1316 | ||
1317 | static int | |
1318 | wants_debugger (list, conditions) | |
1319 | Lisp_Object list, conditions; | |
1320 | { | |
4de86b16 | 1321 | if (NILP (list)) |
128c0f66 RM |
1322 | return 0; |
1323 | if (! CONSP (list)) | |
1324 | return 1; | |
1325 | ||
ab67260b | 1326 | while (CONSP (conditions)) |
128c0f66 | 1327 | { |
ab67260b | 1328 | Lisp_Object this, tail; |
03699b14 KR |
1329 | this = XCAR (conditions); |
1330 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1331 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1332 | return 1; |
03699b14 | 1333 | conditions = XCDR (conditions); |
128c0f66 | 1334 | } |
ab67260b | 1335 | return 0; |
128c0f66 RM |
1336 | } |
1337 | ||
fc950e09 KH |
1338 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1339 | and described by SIGNAL-DATA, should skip the debugger | |
1340 | according to debugger-ignore-errors. */ | |
1341 | ||
1342 | static int | |
1343 | skip_debugger (conditions, data) | |
1344 | Lisp_Object conditions, data; | |
1345 | { | |
1346 | Lisp_Object tail; | |
1347 | int first_string = 1; | |
1348 | Lisp_Object error_message; | |
1349 | ||
1350 | for (tail = Vdebug_ignored_errors; CONSP (tail); | |
03699b14 | 1351 | tail = XCDR (tail)) |
fc950e09 | 1352 | { |
03699b14 | 1353 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1354 | { |
1355 | if (first_string) | |
1356 | { | |
1357 | error_message = Ferror_message_string (data); | |
1358 | first_string = 0; | |
1359 | } | |
03699b14 | 1360 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1361 | return 1; |
1362 | } | |
1363 | else | |
1364 | { | |
1365 | Lisp_Object contail; | |
1366 | ||
1367 | for (contail = conditions; CONSP (contail); | |
03699b14 KR |
1368 | contail = XCDR (contail)) |
1369 | if (EQ (XCAR (tail), XCAR (contail))) | |
fc950e09 KH |
1370 | return 1; |
1371 | } | |
1372 | } | |
1373 | ||
1374 | return 0; | |
1375 | } | |
1376 | ||
128c0f66 | 1377 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1378 | There are two ways to pass SIG and DATA: |
9b942ebd | 1379 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1380 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1381 | This is for memory-full errors only. |
1ea9dec4 | 1382 | |
128c0f66 | 1383 | Store value returned from debugger into *DEBUGGER_VALUE_PTR. */ |
db9f0278 JB |
1384 | |
1385 | static Lisp_Object | |
1386 | find_handler_clause (handlers, conditions, sig, data, debugger_value_ptr) | |
1387 | Lisp_Object handlers, conditions, sig, data; | |
1388 | Lisp_Object *debugger_value_ptr; | |
1389 | { | |
1390 | register Lisp_Object h; | |
1391 | register Lisp_Object tem; | |
db9f0278 JB |
1392 | |
1393 | if (EQ (handlers, Qt)) /* t is used by handlers for all conditions, set up by C code. */ | |
1394 | return Qt; | |
61ede770 RS |
1395 | /* error is used similarly, but means print an error message |
1396 | and run the debugger if that is enabled. */ | |
1397 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1398 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1399 | there is a handler. */ | |
db9f0278 | 1400 | { |
61ede770 RS |
1401 | int count = specpdl_ptr - specpdl; |
1402 | int debugger_called = 0; | |
1ea9dec4 | 1403 | Lisp_Object sig_symbol, combined_data; |
9b942ebd RS |
1404 | /* This is set to 1 if we are handling a memory-full error, |
1405 | because these must not run the debugger. | |
1406 | (There is no room in memory to do that!) */ | |
1407 | int no_debugger = 0; | |
1ea9dec4 RS |
1408 | |
1409 | if (NILP (sig)) | |
1410 | { | |
1411 | combined_data = data; | |
1412 | sig_symbol = Fcar (data); | |
9b942ebd | 1413 | no_debugger = 1; |
1ea9dec4 RS |
1414 | } |
1415 | else | |
1416 | { | |
1417 | combined_data = Fcons (sig, data); | |
1418 | sig_symbol = sig; | |
1419 | } | |
61ede770 | 1420 | |
128c0f66 | 1421 | if (wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b RS |
1422 | { |
1423 | #ifdef __STDC__ | |
1424 | internal_with_output_to_temp_buffer ("*Backtrace*", | |
1425 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1426 | Qnil); | |
1427 | #else | |
1428 | internal_with_output_to_temp_buffer ("*Backtrace*", | |
1429 | Fbacktrace, Qnil); | |
1430 | #endif | |
1431 | } | |
9b942ebd RS |
1432 | if (! no_debugger |
1433 | && (EQ (sig_symbol, Qquit) | |
1434 | ? debug_on_quit | |
1435 | : wants_debugger (Vdebug_on_error, conditions)) | |
1ea9dec4 | 1436 | && ! skip_debugger (conditions, combined_data) |
be857679 | 1437 | && when_entered_debugger < num_nonmacro_input_events) |
db9f0278 | 1438 | { |
db9f0278 | 1439 | specbind (Qdebug_on_error, Qnil); |
fc950e09 KH |
1440 | *debugger_value_ptr |
1441 | = call_debugger (Fcons (Qerror, | |
1ea9dec4 | 1442 | Fcons (combined_data, Qnil))); |
61ede770 RS |
1443 | debugger_called = 1; |
1444 | } | |
1445 | /* If there is no handler, return saying whether we ran the debugger. */ | |
1446 | if (EQ (handlers, Qerror)) | |
1447 | { | |
1448 | if (debugger_called) | |
1449 | return unbind_to (count, Qlambda); | |
1450 | return Qt; | |
db9f0278 | 1451 | } |
db9f0278 JB |
1452 | } |
1453 | for (h = handlers; CONSP (h); h = Fcdr (h)) | |
1454 | { | |
5f96776a RS |
1455 | Lisp_Object handler, condit; |
1456 | ||
1457 | handler = Fcar (h); | |
1458 | if (!CONSP (handler)) | |
db9f0278 | 1459 | continue; |
5f96776a RS |
1460 | condit = Fcar (handler); |
1461 | /* Handle a single condition name in handler HANDLER. */ | |
1462 | if (SYMBOLP (condit)) | |
1463 | { | |
1464 | tem = Fmemq (Fcar (handler), conditions); | |
1465 | if (!NILP (tem)) | |
1466 | return handler; | |
1467 | } | |
1468 | /* Handle a list of condition names in handler HANDLER. */ | |
1469 | else if (CONSP (condit)) | |
1470 | { | |
1471 | while (CONSP (condit)) | |
1472 | { | |
1473 | tem = Fmemq (Fcar (condit), conditions); | |
1474 | if (!NILP (tem)) | |
1475 | return handler; | |
03699b14 | 1476 | condit = XCDR (condit); |
5f96776a RS |
1477 | } |
1478 | } | |
db9f0278 JB |
1479 | } |
1480 | return Qnil; | |
1481 | } | |
1482 | ||
1483 | /* dump an error message; called like printf */ | |
1484 | ||
1485 | /* VARARGS 1 */ | |
1486 | void | |
1487 | error (m, a1, a2, a3) | |
1488 | char *m; | |
9125da08 | 1489 | char *a1, *a2, *a3; |
db9f0278 JB |
1490 | { |
1491 | char buf[200]; | |
9125da08 RS |
1492 | int size = 200; |
1493 | int mlen; | |
1494 | char *buffer = buf; | |
1495 | char *args[3]; | |
1496 | int allocated = 0; | |
1497 | Lisp_Object string; | |
1498 | ||
1499 | args[0] = a1; | |
1500 | args[1] = a2; | |
1501 | args[2] = a3; | |
1502 | ||
1503 | mlen = strlen (m); | |
db9f0278 JB |
1504 | |
1505 | while (1) | |
9125da08 | 1506 | { |
955f3ff9 | 1507 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
1508 | if (used < size) |
1509 | break; | |
1510 | size *= 2; | |
1511 | if (allocated) | |
1512 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
1513 | else |
1514 | { | |
1515 | buffer = (char *) xmalloc (size); | |
1516 | allocated = 1; | |
1517 | } | |
9125da08 RS |
1518 | } |
1519 | ||
955f3ff9 | 1520 | string = build_string (buffer); |
9125da08 RS |
1521 | if (allocated) |
1522 | free (buffer); | |
1523 | ||
1524 | Fsignal (Qerror, Fcons (string, Qnil)); | |
db9f0278 JB |
1525 | } |
1526 | \f | |
1527 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 1, 0, | |
1528 | "T if FUNCTION makes provisions for interactive calling.\n\ | |
1529 | This means it contains a description for how to read arguments to give it.\n\ | |
1530 | The value is nil for an invalid function or a symbol with no function\n\ | |
1531 | definition.\n\ | |
1532 | \n\ | |
1533 | Interactively callable functions include strings and vectors (treated\n\ | |
1534 | as keyboard macros), lambda-expressions that contain a top-level call\n\ | |
1535 | to `interactive', autoload definitions made by `autoload' with non-nil\n\ | |
1536 | fourth argument, and some of the built-in functions of Lisp.\n\ | |
1537 | \n\ | |
1538 | Also, a symbol satisfies `commandp' if its function definition does so.") | |
1539 | (function) | |
1540 | Lisp_Object function; | |
1541 | { | |
1542 | register Lisp_Object fun; | |
1543 | register Lisp_Object funcar; | |
db9f0278 JB |
1544 | |
1545 | fun = function; | |
1546 | ||
ffd56f97 JB |
1547 | fun = indirect_function (fun); |
1548 | if (EQ (fun, Qunbound)) | |
1549 | return Qnil; | |
db9f0278 JB |
1550 | |
1551 | /* Emacs primitives are interactive if their DEFUN specifies an | |
1552 | interactive spec. */ | |
90165123 | 1553 | if (SUBRP (fun)) |
db9f0278 JB |
1554 | { |
1555 | if (XSUBR (fun)->prompt) | |
1556 | return Qt; | |
1557 | else | |
1558 | return Qnil; | |
1559 | } | |
1560 | ||
1561 | /* Bytecode objects are interactive if they are long enough to | |
1562 | have an element whose index is COMPILED_INTERACTIVE, which is | |
1563 | where the interactive spec is stored. */ | |
90165123 | 1564 | else if (COMPILEDP (fun)) |
f9b4aacf | 1565 | return ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
db9f0278 JB |
1566 | ? Qt : Qnil); |
1567 | ||
1568 | /* Strings and vectors are keyboard macros. */ | |
90165123 | 1569 | if (STRINGP (fun) || VECTORP (fun)) |
db9f0278 JB |
1570 | return Qt; |
1571 | ||
1572 | /* Lists may represent commands. */ | |
1573 | if (!CONSP (fun)) | |
1574 | return Qnil; | |
1575 | funcar = Fcar (fun); | |
90165123 | 1576 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
1577 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
1578 | if (EQ (funcar, Qlambda)) | |
1579 | return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
1580 | if (EQ (funcar, Qmocklisp)) | |
1581 | return Qt; /* All mocklisp functions can be called interactively */ | |
1582 | if (EQ (funcar, Qautoload)) | |
1583 | return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
1584 | else | |
1585 | return Qnil; | |
1586 | } | |
1587 | ||
1588 | /* ARGSUSED */ | |
1589 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, | |
1590 | "Define FUNCTION to autoload from FILE.\n\ | |
1591 | FUNCTION is a symbol; FILE is a file name string to pass to `load'.\n\ | |
1592 | Third arg DOCSTRING is documentation for the function.\n\ | |
1593 | Fourth arg INTERACTIVE if non-nil says function can be called interactively.\n\ | |
ee9ee63c JB |
1594 | Fifth arg TYPE indicates the type of the object:\n\ |
1595 | nil or omitted says FUNCTION is a function,\n\ | |
1596 | `keymap' says FUNCTION is really a keymap, and\n\ | |
1597 | `macro' or t says FUNCTION is really a macro.\n\ | |
db9f0278 JB |
1598 | Third through fifth args give info about the real definition.\n\ |
1599 | They default to nil.\n\ | |
1600 | If FUNCTION is already defined other than as an autoload,\n\ | |
1601 | this does nothing and returns nil.") | |
ee9ee63c JB |
1602 | (function, file, docstring, interactive, type) |
1603 | Lisp_Object function, file, docstring, interactive, type; | |
db9f0278 JB |
1604 | { |
1605 | #ifdef NO_ARG_ARRAY | |
1606 | Lisp_Object args[4]; | |
1607 | #endif | |
1608 | ||
1609 | CHECK_SYMBOL (function, 0); | |
1610 | CHECK_STRING (file, 1); | |
1611 | ||
1612 | /* If function is defined and not as an autoload, don't override */ | |
1613 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 1614 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 1615 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
1616 | return Qnil; |
1617 | ||
1618 | #ifdef NO_ARG_ARRAY | |
1619 | args[0] = file; | |
1620 | args[1] = docstring; | |
1621 | args[2] = interactive; | |
ee9ee63c | 1622 | args[3] = type; |
db9f0278 JB |
1623 | |
1624 | return Ffset (function, Fcons (Qautoload, Flist (4, &args[0]))); | |
1625 | #else /* NO_ARG_ARRAY */ | |
1626 | return Ffset (function, Fcons (Qautoload, Flist (4, &file))); | |
1627 | #endif /* not NO_ARG_ARRAY */ | |
1628 | } | |
1629 | ||
1630 | Lisp_Object | |
1631 | un_autoload (oldqueue) | |
1632 | Lisp_Object oldqueue; | |
1633 | { | |
1634 | register Lisp_Object queue, first, second; | |
1635 | ||
1636 | /* Queue to unwind is current value of Vautoload_queue. | |
1637 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
1638 | queue = Vautoload_queue; | |
1639 | Vautoload_queue = oldqueue; | |
1640 | while (CONSP (queue)) | |
1641 | { | |
1642 | first = Fcar (queue); | |
1643 | second = Fcdr (first); | |
1644 | first = Fcar (first); | |
1645 | if (EQ (second, Qnil)) | |
1646 | Vfeatures = first; | |
1647 | else | |
1648 | Ffset (first, second); | |
1649 | queue = Fcdr (queue); | |
1650 | } | |
1651 | return Qnil; | |
1652 | } | |
1653 | ||
ca20916b RS |
1654 | /* Load an autoloaded function. |
1655 | FUNNAME is the symbol which is the function's name. | |
1656 | FUNDEF is the autoload definition (a list). */ | |
1657 | ||
045ba794 | 1658 | void |
db9f0278 JB |
1659 | do_autoload (fundef, funname) |
1660 | Lisp_Object fundef, funname; | |
1661 | { | |
1662 | int count = specpdl_ptr - specpdl; | |
cb81ac97 | 1663 | Lisp_Object fun, queue, first, second; |
ca20916b | 1664 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 JB |
1665 | |
1666 | fun = funname; | |
1667 | CHECK_SYMBOL (funname, 0); | |
ca20916b | 1668 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 1669 | |
f87740dc RS |
1670 | /* Preserve the match data. */ |
1671 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
1672 | ||
1673 | /* Value saved here is to be restored into Vautoload_queue. */ | |
db9f0278 JB |
1674 | record_unwind_protect (un_autoload, Vautoload_queue); |
1675 | Vautoload_queue = Qt; | |
4aac2302 | 1676 | Fload (Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil, Qt); |
2a49b6e5 | 1677 | |
f87740dc | 1678 | /* Save the old autoloads, in case we ever do an unload. */ |
2a49b6e5 RS |
1679 | queue = Vautoload_queue; |
1680 | while (CONSP (queue)) | |
1681 | { | |
1682 | first = Fcar (queue); | |
1683 | second = Fcdr (first); | |
1684 | first = Fcar (first); | |
5739ce6b ER |
1685 | |
1686 | /* Note: This test is subtle. The cdr of an autoload-queue entry | |
1687 | may be an atom if the autoload entry was generated by a defalias | |
f87740dc | 1688 | or fset. */ |
5739ce6b | 1689 | if (CONSP (second)) |
03e267c2 | 1690 | Fput (first, Qautoload, (Fcdr (second))); |
5739ce6b | 1691 | |
2a49b6e5 RS |
1692 | queue = Fcdr (queue); |
1693 | } | |
1694 | ||
db9f0278 JB |
1695 | /* Once loading finishes, don't undo it. */ |
1696 | Vautoload_queue = Qt; | |
1697 | unbind_to (count, Qnil); | |
1698 | ||
ffd56f97 JB |
1699 | fun = Findirect_function (fun); |
1700 | ||
76c2b0cc | 1701 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 JB |
1702 | error ("Autoloading failed to define function %s", |
1703 | XSYMBOL (funname)->name->data); | |
ca20916b | 1704 | UNGCPRO; |
db9f0278 JB |
1705 | } |
1706 | \f | |
1707 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
1708 | "Evaluate FORM and return its value.") | |
1709 | (form) | |
1710 | Lisp_Object form; | |
1711 | { | |
1712 | Lisp_Object fun, val, original_fun, original_args; | |
1713 | Lisp_Object funcar; | |
1714 | struct backtrace backtrace; | |
1715 | struct gcpro gcpro1, gcpro2, gcpro3; | |
1716 | ||
48f8dfa3 GM |
1717 | /* Since Fsignal resets this to 0, it had better be 0 now |
1718 | or else we have a potential bug. */ | |
1719 | if (interrupt_input_blocked != 0) | |
1720 | abort (); | |
1721 | ||
90165123 | 1722 | if (SYMBOLP (form)) |
db9f0278 JB |
1723 | { |
1724 | if (EQ (Vmocklisp_arguments, Qt)) | |
1725 | return Fsymbol_value (form); | |
1726 | val = Fsymbol_value (form); | |
265a9e55 | 1727 | if (NILP (val)) |
a631e24c | 1728 | XSETFASTINT (val, 0); |
db9f0278 | 1729 | else if (EQ (val, Qt)) |
a631e24c | 1730 | XSETFASTINT (val, 1); |
db9f0278 JB |
1731 | return val; |
1732 | } | |
1733 | if (!CONSP (form)) | |
1734 | return form; | |
1735 | ||
1736 | QUIT; | |
1737 | if (consing_since_gc > gc_cons_threshold) | |
1738 | { | |
1739 | GCPRO1 (form); | |
1740 | Fgarbage_collect (); | |
1741 | UNGCPRO; | |
1742 | } | |
1743 | ||
1744 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
1745 | { | |
1746 | if (max_lisp_eval_depth < 100) | |
1747 | max_lisp_eval_depth = 100; | |
1748 | if (lisp_eval_depth > max_lisp_eval_depth) | |
1749 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
1750 | } | |
1751 | ||
1752 | original_fun = Fcar (form); | |
1753 | original_args = Fcdr (form); | |
1754 | ||
1755 | backtrace.next = backtrace_list; | |
1756 | backtrace_list = &backtrace; | |
1757 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
1758 | backtrace.args = &original_args; | |
1759 | backtrace.nargs = UNEVALLED; | |
1760 | backtrace.evalargs = 1; | |
1761 | backtrace.debug_on_exit = 0; | |
1762 | ||
1763 | if (debug_on_next_call) | |
1764 | do_debug_on_call (Qt); | |
1765 | ||
1766 | /* At this point, only original_fun and original_args | |
1767 | have values that will be used below */ | |
1768 | retry: | |
ffd56f97 | 1769 | fun = Findirect_function (original_fun); |
db9f0278 | 1770 | |
90165123 | 1771 | if (SUBRP (fun)) |
db9f0278 JB |
1772 | { |
1773 | Lisp_Object numargs; | |
166c822d | 1774 | Lisp_Object argvals[8]; |
db9f0278 JB |
1775 | Lisp_Object args_left; |
1776 | register int i, maxargs; | |
1777 | ||
1778 | args_left = original_args; | |
1779 | numargs = Flength (args_left); | |
1780 | ||
1781 | if (XINT (numargs) < XSUBR (fun)->min_args || | |
1782 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
1783 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
1784 | ||
1785 | if (XSUBR (fun)->max_args == UNEVALLED) | |
1786 | { | |
1787 | backtrace.evalargs = 0; | |
1788 | val = (*XSUBR (fun)->function) (args_left); | |
1789 | goto done; | |
1790 | } | |
1791 | ||
1792 | if (XSUBR (fun)->max_args == MANY) | |
1793 | { | |
1794 | /* Pass a vector of evaluated arguments */ | |
1795 | Lisp_Object *vals; | |
1796 | register int argnum = 0; | |
1797 | ||
1798 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
1799 | ||
1800 | GCPRO3 (args_left, fun, fun); | |
1801 | gcpro3.var = vals; | |
1802 | gcpro3.nvars = 0; | |
1803 | ||
265a9e55 | 1804 | while (!NILP (args_left)) |
db9f0278 JB |
1805 | { |
1806 | vals[argnum++] = Feval (Fcar (args_left)); | |
1807 | args_left = Fcdr (args_left); | |
1808 | gcpro3.nvars = argnum; | |
1809 | } | |
db9f0278 JB |
1810 | |
1811 | backtrace.args = vals; | |
1812 | backtrace.nargs = XINT (numargs); | |
1813 | ||
1814 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 1815 | UNGCPRO; |
db9f0278 JB |
1816 | goto done; |
1817 | } | |
1818 | ||
1819 | GCPRO3 (args_left, fun, fun); | |
1820 | gcpro3.var = argvals; | |
1821 | gcpro3.nvars = 0; | |
1822 | ||
1823 | maxargs = XSUBR (fun)->max_args; | |
1824 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
1825 | { | |
1826 | argvals[i] = Feval (Fcar (args_left)); | |
1827 | gcpro3.nvars = ++i; | |
1828 | } | |
1829 | ||
1830 | UNGCPRO; | |
1831 | ||
1832 | backtrace.args = argvals; | |
1833 | backtrace.nargs = XINT (numargs); | |
1834 | ||
1835 | switch (i) | |
1836 | { | |
1837 | case 0: | |
1838 | val = (*XSUBR (fun)->function) (); | |
1839 | goto done; | |
1840 | case 1: | |
1841 | val = (*XSUBR (fun)->function) (argvals[0]); | |
1842 | goto done; | |
1843 | case 2: | |
1844 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
1845 | goto done; | |
1846 | case 3: | |
1847 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
1848 | argvals[2]); | |
1849 | goto done; | |
1850 | case 4: | |
1851 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
1852 | argvals[2], argvals[3]); | |
1853 | goto done; | |
1854 | case 5: | |
1855 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1856 | argvals[3], argvals[4]); | |
1857 | goto done; | |
1858 | case 6: | |
1859 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1860 | argvals[3], argvals[4], argvals[5]); | |
1861 | goto done; | |
15c65264 RS |
1862 | case 7: |
1863 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1864 | argvals[3], argvals[4], argvals[5], | |
1865 | argvals[6]); | |
1866 | goto done; | |
db9f0278 | 1867 | |
166c822d KH |
1868 | case 8: |
1869 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1870 | argvals[3], argvals[4], argvals[5], | |
1871 | argvals[6], argvals[7]); | |
1872 | goto done; | |
1873 | ||
db9f0278 | 1874 | default: |
08564963 JB |
1875 | /* Someone has created a subr that takes more arguments than |
1876 | is supported by this code. We need to either rewrite the | |
1877 | subr to use a different argument protocol, or add more | |
1878 | cases to this switch. */ | |
1879 | abort (); | |
db9f0278 JB |
1880 | } |
1881 | } | |
90165123 | 1882 | if (COMPILEDP (fun)) |
db9f0278 JB |
1883 | val = apply_lambda (fun, original_args, 1); |
1884 | else | |
1885 | { | |
1886 | if (!CONSP (fun)) | |
1887 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
1888 | funcar = Fcar (fun); | |
90165123 | 1889 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
1890 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
1891 | if (EQ (funcar, Qautoload)) | |
1892 | { | |
1893 | do_autoload (fun, original_fun); | |
1894 | goto retry; | |
1895 | } | |
1896 | if (EQ (funcar, Qmacro)) | |
1897 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
1898 | else if (EQ (funcar, Qlambda)) | |
1899 | val = apply_lambda (fun, original_args, 1); | |
1900 | else if (EQ (funcar, Qmocklisp)) | |
1901 | val = ml_apply (fun, original_args); | |
1902 | else | |
1903 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
1904 | } | |
1905 | done: | |
1906 | if (!EQ (Vmocklisp_arguments, Qt)) | |
1907 | { | |
265a9e55 | 1908 | if (NILP (val)) |
a631e24c | 1909 | XSETFASTINT (val, 0); |
db9f0278 | 1910 | else if (EQ (val, Qt)) |
a631e24c | 1911 | XSETFASTINT (val, 1); |
db9f0278 JB |
1912 | } |
1913 | lisp_eval_depth--; | |
1914 | if (backtrace.debug_on_exit) | |
1915 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
1916 | backtrace_list = backtrace.next; | |
1917 | return val; | |
1918 | } | |
1919 | \f | |
1920 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
1921 | "Call FUNCTION with our remaining args, using our last arg as list of args.\n\ | |
fd7fe9a1 | 1922 | Then return the value FUNCTION returns.\n\ |
db9f0278 JB |
1923 | Thus, (apply '+ 1 2 '(3 4)) returns 10.") |
1924 | (nargs, args) | |
1925 | int nargs; | |
1926 | Lisp_Object *args; | |
1927 | { | |
1928 | register int i, numargs; | |
1929 | register Lisp_Object spread_arg; | |
1930 | register Lisp_Object *funcall_args; | |
db9f0278 | 1931 | Lisp_Object fun; |
a6e3fa71 | 1932 | struct gcpro gcpro1; |
db9f0278 JB |
1933 | |
1934 | fun = args [0]; | |
1935 | funcall_args = 0; | |
1936 | spread_arg = args [nargs - 1]; | |
1937 | CHECK_LIST (spread_arg, nargs); | |
1938 | ||
1939 | numargs = XINT (Flength (spread_arg)); | |
1940 | ||
1941 | if (numargs == 0) | |
1942 | return Ffuncall (nargs - 1, args); | |
1943 | else if (numargs == 1) | |
1944 | { | |
03699b14 | 1945 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
1946 | return Ffuncall (nargs, args); |
1947 | } | |
1948 | ||
a6e3fa71 | 1949 | numargs += nargs - 2; |
db9f0278 | 1950 | |
ffd56f97 JB |
1951 | fun = indirect_function (fun); |
1952 | if (EQ (fun, Qunbound)) | |
db9f0278 | 1953 | { |
ffd56f97 JB |
1954 | /* Let funcall get the error */ |
1955 | fun = args[0]; | |
1956 | goto funcall; | |
db9f0278 JB |
1957 | } |
1958 | ||
90165123 | 1959 | if (SUBRP (fun)) |
db9f0278 JB |
1960 | { |
1961 | if (numargs < XSUBR (fun)->min_args | |
1962 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
1963 | goto funcall; /* Let funcall get the error */ | |
1964 | else if (XSUBR (fun)->max_args > numargs) | |
1965 | { | |
1966 | /* Avoid making funcall cons up a yet another new vector of arguments | |
1967 | by explicitly supplying nil's for optional values */ | |
1968 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
1969 | * sizeof (Lisp_Object)); | |
1970 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
1971 | funcall_args[++i] = Qnil; | |
a6e3fa71 JB |
1972 | GCPRO1 (*funcall_args); |
1973 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
1974 | } |
1975 | } | |
1976 | funcall: | |
1977 | /* We add 1 to numargs because funcall_args includes the | |
1978 | function itself as well as its arguments. */ | |
1979 | if (!funcall_args) | |
a6e3fa71 JB |
1980 | { |
1981 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
1982 | * sizeof (Lisp_Object)); | |
1983 | GCPRO1 (*funcall_args); | |
1984 | gcpro1.nvars = 1 + numargs; | |
1985 | } | |
1986 | ||
db9f0278 JB |
1987 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
1988 | /* Spread the last arg we got. Its first element goes in | |
1989 | the slot that it used to occupy, hence this value of I. */ | |
1990 | i = nargs - 1; | |
265a9e55 | 1991 | while (!NILP (spread_arg)) |
db9f0278 | 1992 | { |
03699b14 KR |
1993 | funcall_args [i++] = XCAR (spread_arg); |
1994 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 1995 | } |
a6e3fa71 JB |
1996 | |
1997 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
1998 | } |
1999 | \f | |
ff936e53 SM |
2000 | /* Run hook variables in various ways. */ |
2001 | ||
2002 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2003 | ||
2004 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 1, MANY, 0, | |
2005 | "Run each hook in HOOKS. Major mode functions use this.\n\ | |
2006 | Each argument should be a symbol, a hook variable.\n\ | |
2007 | These symbols are processed in the order specified.\n\ | |
2008 | If a hook symbol has a non-nil value, that value may be a function\n\ | |
2009 | or a list of functions to be called to run the hook.\n\ | |
2010 | If the value is a function, it is called with no arguments.\n\ | |
2011 | If it is a list, the elements are called, in order, with no arguments.\n\ | |
2012 | \n\ | |
2013 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2014 | not `make-local-variable'.") | |
2015 | (nargs, args) | |
2016 | int nargs; | |
2017 | Lisp_Object *args; | |
2018 | { | |
2019 | Lisp_Object hook[1]; | |
2020 | register int i; | |
2021 | ||
2022 | for (i = 0; i < nargs; i++) | |
2023 | { | |
2024 | hook[0] = args[i]; | |
2025 | run_hook_with_args (1, hook, to_completion); | |
2026 | } | |
2027 | ||
2028 | return Qnil; | |
2029 | } | |
2030 | ||
a0d76c27 EN |
2031 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
2032 | Srun_hook_with_args, 1, MANY, 0, | |
b0b667cb KH |
2033 | "Run HOOK with the specified arguments ARGS.\n\ |
2034 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil\n\ | |
2035 | value, that value may be a function or a list of functions to be\n\ | |
2036 | called to run the hook. If the value is a function, it is called with\n\ | |
2037 | the given arguments and its return value is returned. If it is a list\n\ | |
2038 | of functions, those functions are called, in order,\n\ | |
2039 | with the given arguments ARGS.\n\ | |
2040 | It is best not to depend on the value return by `run-hook-with-args',\n\ | |
2041 | as that may change.\n\ | |
2042 | \n\ | |
ff936e53 SM |
2043 | To make a hook variable buffer-local, use `make-local-hook',\n\ |
2044 | not `make-local-variable'.") | |
2045 | (nargs, args) | |
2046 | int nargs; | |
2047 | Lisp_Object *args; | |
2048 | { | |
2049 | return run_hook_with_args (nargs, args, to_completion); | |
2050 | } | |
2051 | ||
a0d76c27 EN |
2052 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
2053 | Srun_hook_with_args_until_success, 1, MANY, 0, | |
ff936e53 SM |
2054 | "Run HOOK with the specified arguments ARGS.\n\ |
2055 | HOOK should be a symbol, a hook variable. Its value should\n\ | |
2056 | be a list of functions. We call those functions, one by one,\n\ | |
2057 | passing arguments ARGS to each of them, until one of them\n\ | |
2058 | returns a non-nil value. Then we return that value.\n\ | |
2059 | If all the functions return nil, we return nil.\n\ | |
2060 | \n\ | |
2061 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2062 | not `make-local-variable'.") | |
b0b667cb KH |
2063 | (nargs, args) |
2064 | int nargs; | |
2065 | Lisp_Object *args; | |
2066 | { | |
ff936e53 SM |
2067 | return run_hook_with_args (nargs, args, until_success); |
2068 | } | |
2069 | ||
a0d76c27 EN |
2070 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
2071 | Srun_hook_with_args_until_failure, 1, MANY, 0, | |
ff936e53 SM |
2072 | "Run HOOK with the specified arguments ARGS.\n\ |
2073 | HOOK should be a symbol, a hook variable. Its value should\n\ | |
2074 | be a list of functions. We call those functions, one by one,\n\ | |
2075 | passing arguments ARGS to each of them, until one of them\n\ | |
2076 | returns nil. Then we return nil.\n\ | |
2077 | If all the functions return non-nil, we return non-nil.\n\ | |
2078 | \n\ | |
2079 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2080 | not `make-local-variable'.") | |
2081 | (nargs, args) | |
2082 | int nargs; | |
2083 | Lisp_Object *args; | |
2084 | { | |
2085 | return run_hook_with_args (nargs, args, until_failure); | |
2086 | } | |
2087 | ||
c933ea05 RS |
2088 | /* ARGS[0] should be a hook symbol. |
2089 | Call each of the functions in the hook value, passing each of them | |
2090 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2091 | COND specifies a condition to test after each call | |
2092 | to decide whether to stop. | |
2093 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2094 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2095 | ||
ff936e53 SM |
2096 | Lisp_Object |
2097 | run_hook_with_args (nargs, args, cond) | |
2098 | int nargs; | |
2099 | Lisp_Object *args; | |
2100 | enum run_hooks_condition cond; | |
2101 | { | |
2102 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2103 | Lisp_Object globals; |
2104 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2105 | |
f029ca5f RS |
2106 | /* If we are dying or still initializing, |
2107 | don't do anything--it would probably crash if we tried. */ | |
2108 | if (NILP (Vrun_hooks)) | |
2109 | return; | |
2110 | ||
b0b667cb | 2111 | sym = args[0]; |
aa681b51 | 2112 | val = find_symbol_value (sym); |
ff936e53 SM |
2113 | ret = (cond == until_failure ? Qt : Qnil); |
2114 | ||
b0b667cb | 2115 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2116 | return ret; |
03699b14 | 2117 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2118 | { |
2119 | args[0] = val; | |
2120 | return Ffuncall (nargs, args); | |
2121 | } | |
2122 | else | |
2123 | { | |
fada05d6 KH |
2124 | globals = Qnil; |
2125 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2126 | |
ff936e53 SM |
2127 | for (; |
2128 | CONSP (val) && ((cond == to_completion) | |
2129 | || (cond == until_success ? NILP (ret) | |
2130 | : !NILP (ret))); | |
03699b14 | 2131 | val = XCDR (val)) |
b0b667cb | 2132 | { |
03699b14 | 2133 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2134 | { |
2135 | /* t indicates this hook has a local binding; | |
2136 | it means to run the global binding too. */ | |
b0b667cb | 2137 | |
ff936e53 SM |
2138 | for (globals = Fdefault_value (sym); |
2139 | CONSP (globals) && ((cond == to_completion) | |
2140 | || (cond == until_success ? NILP (ret) | |
2141 | : !NILP (ret))); | |
03699b14 | 2142 | globals = XCDR (globals)) |
b0b667cb | 2143 | { |
03699b14 | 2144 | args[0] = XCAR (globals); |
77d92e05 RS |
2145 | /* In a global value, t should not occur. If it does, we |
2146 | must ignore it to avoid an endless loop. */ | |
2147 | if (!EQ (args[0], Qt)) | |
2148 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2149 | } |
2150 | } | |
2151 | else | |
2152 | { | |
03699b14 | 2153 | args[0] = XCAR (val); |
ff936e53 | 2154 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2155 | } |
2156 | } | |
cb9d21f8 RS |
2157 | |
2158 | UNGCPRO; | |
ff936e53 | 2159 | return ret; |
b0b667cb KH |
2160 | } |
2161 | } | |
c933ea05 RS |
2162 | |
2163 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2164 | present value of that symbol. | |
2165 | Call each element of FUNLIST, | |
2166 | passing each of them the rest of ARGS. | |
2167 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2168 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2169 | ||
2170 | Lisp_Object | |
2171 | run_hook_list_with_args (funlist, nargs, args) | |
2172 | Lisp_Object funlist; | |
2173 | int nargs; | |
2174 | Lisp_Object *args; | |
2175 | { | |
2176 | Lisp_Object sym; | |
2177 | Lisp_Object val; | |
fada05d6 KH |
2178 | Lisp_Object globals; |
2179 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2180 | |
2181 | sym = args[0]; | |
fada05d6 KH |
2182 | globals = Qnil; |
2183 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2184 | |
03699b14 | 2185 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2186 | { |
03699b14 | 2187 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2188 | { |
2189 | /* t indicates this hook has a local binding; | |
2190 | it means to run the global binding too. */ | |
c933ea05 RS |
2191 | |
2192 | for (globals = Fdefault_value (sym); | |
2193 | CONSP (globals); | |
03699b14 | 2194 | globals = XCDR (globals)) |
c933ea05 | 2195 | { |
03699b14 | 2196 | args[0] = XCAR (globals); |
77d92e05 RS |
2197 | /* In a global value, t should not occur. If it does, we |
2198 | must ignore it to avoid an endless loop. */ | |
2199 | if (!EQ (args[0], Qt)) | |
2200 | Ffuncall (nargs, args); | |
c933ea05 RS |
2201 | } |
2202 | } | |
2203 | else | |
2204 | { | |
03699b14 | 2205 | args[0] = XCAR (val); |
c933ea05 RS |
2206 | Ffuncall (nargs, args); |
2207 | } | |
2208 | } | |
2209 | UNGCPRO; | |
2210 | return Qnil; | |
2211 | } | |
7d48558f RS |
2212 | |
2213 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2214 | ||
2215 | void | |
2216 | run_hook_with_args_2 (hook, arg1, arg2) | |
2217 | Lisp_Object hook, arg1, arg2; | |
2218 | { | |
2219 | Lisp_Object temp[3]; | |
2220 | temp[0] = hook; | |
2221 | temp[1] = arg1; | |
2222 | temp[2] = arg2; | |
2223 | ||
2224 | Frun_hook_with_args (3, temp); | |
2225 | } | |
ff936e53 | 2226 | \f |
db9f0278 JB |
2227 | /* Apply fn to arg */ |
2228 | Lisp_Object | |
2229 | apply1 (fn, arg) | |
2230 | Lisp_Object fn, arg; | |
2231 | { | |
a6e3fa71 JB |
2232 | struct gcpro gcpro1; |
2233 | ||
2234 | GCPRO1 (fn); | |
265a9e55 | 2235 | if (NILP (arg)) |
a6e3fa71 JB |
2236 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2237 | gcpro1.nvars = 2; | |
db9f0278 JB |
2238 | #ifdef NO_ARG_ARRAY |
2239 | { | |
2240 | Lisp_Object args[2]; | |
2241 | args[0] = fn; | |
2242 | args[1] = arg; | |
a6e3fa71 JB |
2243 | gcpro1.var = args; |
2244 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2245 | } |
2246 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2247 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2248 | #endif /* not NO_ARG_ARRAY */ |
2249 | } | |
2250 | ||
2251 | /* Call function fn on no arguments */ | |
2252 | Lisp_Object | |
2253 | call0 (fn) | |
2254 | Lisp_Object fn; | |
2255 | { | |
a6e3fa71 JB |
2256 | struct gcpro gcpro1; |
2257 | ||
2258 | GCPRO1 (fn); | |
2259 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2260 | } |
2261 | ||
15285f9f | 2262 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2263 | /* ARGSUSED */ |
2264 | Lisp_Object | |
15285f9f RS |
2265 | call1 (fn, arg1) |
2266 | Lisp_Object fn, arg1; | |
db9f0278 | 2267 | { |
a6e3fa71 | 2268 | struct gcpro gcpro1; |
db9f0278 | 2269 | #ifdef NO_ARG_ARRAY |
a6e3fa71 JB |
2270 | Lisp_Object args[2]; |
2271 | ||
db9f0278 | 2272 | args[0] = fn; |
15285f9f | 2273 | args[1] = arg1; |
a6e3fa71 JB |
2274 | GCPRO1 (args[0]); |
2275 | gcpro1.nvars = 2; | |
2276 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2277 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2278 | GCPRO1 (fn); |
2279 | gcpro1.nvars = 2; | |
2280 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2281 | #endif /* not NO_ARG_ARRAY */ |
2282 | } | |
2283 | ||
15285f9f | 2284 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2285 | /* ARGSUSED */ |
2286 | Lisp_Object | |
15285f9f RS |
2287 | call2 (fn, arg1, arg2) |
2288 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2289 | { |
a6e3fa71 | 2290 | struct gcpro gcpro1; |
db9f0278 JB |
2291 | #ifdef NO_ARG_ARRAY |
2292 | Lisp_Object args[3]; | |
2293 | args[0] = fn; | |
15285f9f RS |
2294 | args[1] = arg1; |
2295 | args[2] = arg2; | |
a6e3fa71 JB |
2296 | GCPRO1 (args[0]); |
2297 | gcpro1.nvars = 3; | |
2298 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2299 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2300 | GCPRO1 (fn); |
2301 | gcpro1.nvars = 3; | |
2302 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2303 | #endif /* not NO_ARG_ARRAY */ |
2304 | } | |
2305 | ||
15285f9f | 2306 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2307 | /* ARGSUSED */ |
2308 | Lisp_Object | |
15285f9f RS |
2309 | call3 (fn, arg1, arg2, arg3) |
2310 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2311 | { |
a6e3fa71 | 2312 | struct gcpro gcpro1; |
db9f0278 JB |
2313 | #ifdef NO_ARG_ARRAY |
2314 | Lisp_Object args[4]; | |
2315 | args[0] = fn; | |
15285f9f RS |
2316 | args[1] = arg1; |
2317 | args[2] = arg2; | |
2318 | args[3] = arg3; | |
a6e3fa71 JB |
2319 | GCPRO1 (args[0]); |
2320 | gcpro1.nvars = 4; | |
2321 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2322 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2323 | GCPRO1 (fn); |
2324 | gcpro1.nvars = 4; | |
2325 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2326 | #endif /* not NO_ARG_ARRAY */ |
2327 | } | |
2328 | ||
15285f9f | 2329 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2330 | /* ARGSUSED */ |
2331 | Lisp_Object | |
15285f9f RS |
2332 | call4 (fn, arg1, arg2, arg3, arg4) |
2333 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2334 | { |
2335 | struct gcpro gcpro1; | |
2336 | #ifdef NO_ARG_ARRAY | |
2337 | Lisp_Object args[5]; | |
2338 | args[0] = fn; | |
15285f9f RS |
2339 | args[1] = arg1; |
2340 | args[2] = arg2; | |
2341 | args[3] = arg3; | |
2342 | args[4] = arg4; | |
a5a44b91 JB |
2343 | GCPRO1 (args[0]); |
2344 | gcpro1.nvars = 5; | |
2345 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2346 | #else /* not NO_ARG_ARRAY */ | |
2347 | GCPRO1 (fn); | |
2348 | gcpro1.nvars = 5; | |
2349 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2350 | #endif /* not NO_ARG_ARRAY */ | |
2351 | } | |
2352 | ||
15285f9f RS |
2353 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2354 | /* ARGSUSED */ | |
2355 | Lisp_Object | |
2356 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2357 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2358 | { | |
2359 | struct gcpro gcpro1; | |
2360 | #ifdef NO_ARG_ARRAY | |
2361 | Lisp_Object args[6]; | |
2362 | args[0] = fn; | |
2363 | args[1] = arg1; | |
2364 | args[2] = arg2; | |
2365 | args[3] = arg3; | |
2366 | args[4] = arg4; | |
2367 | args[5] = arg5; | |
2368 | GCPRO1 (args[0]); | |
2369 | gcpro1.nvars = 6; | |
2370 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2371 | #else /* not NO_ARG_ARRAY */ | |
2372 | GCPRO1 (fn); | |
2373 | gcpro1.nvars = 6; | |
2374 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2375 | #endif /* not NO_ARG_ARRAY */ | |
2376 | } | |
2377 | ||
2378 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2379 | /* ARGSUSED */ | |
2380 | Lisp_Object | |
2381 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2382 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2383 | { | |
2384 | struct gcpro gcpro1; | |
2385 | #ifdef NO_ARG_ARRAY | |
2386 | Lisp_Object args[7]; | |
2387 | args[0] = fn; | |
2388 | args[1] = arg1; | |
2389 | args[2] = arg2; | |
2390 | args[3] = arg3; | |
2391 | args[4] = arg4; | |
2392 | args[5] = arg5; | |
2393 | args[6] = arg6; | |
2394 | GCPRO1 (args[0]); | |
2395 | gcpro1.nvars = 7; | |
2396 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2397 | #else /* not NO_ARG_ARRAY */ | |
2398 | GCPRO1 (fn); | |
2399 | gcpro1.nvars = 7; | |
2400 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2401 | #endif /* not NO_ARG_ARRAY */ | |
2402 | } | |
2403 | ||
db9f0278 JB |
2404 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
2405 | "Call first argument as a function, passing remaining arguments to it.\n\ | |
fd7fe9a1 | 2406 | Return the value that function returns.\n\ |
db9f0278 JB |
2407 | Thus, (funcall 'cons 'x 'y) returns (x . y).") |
2408 | (nargs, args) | |
2409 | int nargs; | |
2410 | Lisp_Object *args; | |
2411 | { | |
2412 | Lisp_Object fun; | |
2413 | Lisp_Object funcar; | |
2414 | int numargs = nargs - 1; | |
2415 | Lisp_Object lisp_numargs; | |
2416 | Lisp_Object val; | |
2417 | struct backtrace backtrace; | |
2418 | register Lisp_Object *internal_args; | |
2419 | register int i; | |
2420 | ||
2421 | QUIT; | |
2422 | if (consing_since_gc > gc_cons_threshold) | |
a6e3fa71 | 2423 | Fgarbage_collect (); |
db9f0278 JB |
2424 | |
2425 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2426 | { | |
2427 | if (max_lisp_eval_depth < 100) | |
2428 | max_lisp_eval_depth = 100; | |
2429 | if (lisp_eval_depth > max_lisp_eval_depth) | |
2430 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
2431 | } | |
2432 | ||
2433 | backtrace.next = backtrace_list; | |
2434 | backtrace_list = &backtrace; | |
2435 | backtrace.function = &args[0]; | |
2436 | backtrace.args = &args[1]; | |
2437 | backtrace.nargs = nargs - 1; | |
2438 | backtrace.evalargs = 0; | |
2439 | backtrace.debug_on_exit = 0; | |
2440 | ||
2441 | if (debug_on_next_call) | |
2442 | do_debug_on_call (Qlambda); | |
2443 | ||
2444 | retry: | |
2445 | ||
2446 | fun = args[0]; | |
ffd56f97 JB |
2447 | |
2448 | fun = Findirect_function (fun); | |
db9f0278 | 2449 | |
90165123 | 2450 | if (SUBRP (fun)) |
db9f0278 JB |
2451 | { |
2452 | if (numargs < XSUBR (fun)->min_args | |
2453 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2454 | { | |
a631e24c | 2455 | XSETFASTINT (lisp_numargs, numargs); |
db9f0278 JB |
2456 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (lisp_numargs, Qnil))); |
2457 | } | |
2458 | ||
2459 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2460 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2461 | ||
2462 | if (XSUBR (fun)->max_args == MANY) | |
2463 | { | |
2464 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
2465 | goto done; | |
2466 | } | |
2467 | ||
2468 | if (XSUBR (fun)->max_args > numargs) | |
2469 | { | |
2470 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
2471 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
2472 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
2473 | internal_args[i] = Qnil; | |
2474 | } | |
2475 | else | |
2476 | internal_args = args + 1; | |
2477 | switch (XSUBR (fun)->max_args) | |
2478 | { | |
2479 | case 0: | |
2480 | val = (*XSUBR (fun)->function) (); | |
2481 | goto done; | |
2482 | case 1: | |
2483 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
2484 | goto done; | |
2485 | case 2: | |
2486 | val = (*XSUBR (fun)->function) (internal_args[0], | |
2487 | internal_args[1]); | |
2488 | goto done; | |
2489 | case 3: | |
2490 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2491 | internal_args[2]); | |
2492 | goto done; | |
2493 | case 4: | |
2494 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2495 | internal_args[2], | |
2496 | internal_args[3]); | |
2497 | goto done; | |
2498 | case 5: | |
2499 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2500 | internal_args[2], internal_args[3], | |
2501 | internal_args[4]); | |
2502 | goto done; | |
2503 | case 6: | |
2504 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2505 | internal_args[2], internal_args[3], | |
2506 | internal_args[4], internal_args[5]); | |
2507 | goto done; | |
15c65264 RS |
2508 | case 7: |
2509 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2510 | internal_args[2], internal_args[3], | |
2511 | internal_args[4], internal_args[5], | |
2512 | internal_args[6]); | |
2513 | goto done; | |
db9f0278 | 2514 | |
166c822d KH |
2515 | case 8: |
2516 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2517 | internal_args[2], internal_args[3], | |
2518 | internal_args[4], internal_args[5], | |
2519 | internal_args[6], internal_args[7]); | |
2520 | goto done; | |
2521 | ||
db9f0278 | 2522 | default: |
70ee42f7 | 2523 | |
166c822d | 2524 | /* If a subr takes more than 8 arguments without using MANY |
70ee42f7 JB |
2525 | or UNEVALLED, we need to extend this function to support it. |
2526 | Until this is done, there is no way to call the function. */ | |
2527 | abort (); | |
db9f0278 JB |
2528 | } |
2529 | } | |
90165123 | 2530 | if (COMPILEDP (fun)) |
db9f0278 JB |
2531 | val = funcall_lambda (fun, numargs, args + 1); |
2532 | else | |
2533 | { | |
2534 | if (!CONSP (fun)) | |
2535 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2536 | funcar = Fcar (fun); | |
90165123 | 2537 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
2538 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
2539 | if (EQ (funcar, Qlambda)) | |
2540 | val = funcall_lambda (fun, numargs, args + 1); | |
2541 | else if (EQ (funcar, Qmocklisp)) | |
2542 | val = ml_apply (fun, Flist (numargs, args + 1)); | |
2543 | else if (EQ (funcar, Qautoload)) | |
2544 | { | |
2545 | do_autoload (fun, args[0]); | |
2546 | goto retry; | |
2547 | } | |
2548 | else | |
2549 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2550 | } | |
2551 | done: | |
2552 | lisp_eval_depth--; | |
2553 | if (backtrace.debug_on_exit) | |
2554 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2555 | backtrace_list = backtrace.next; | |
2556 | return val; | |
2557 | } | |
2558 | \f | |
2559 | Lisp_Object | |
2560 | apply_lambda (fun, args, eval_flag) | |
2561 | Lisp_Object fun, args; | |
2562 | int eval_flag; | |
2563 | { | |
2564 | Lisp_Object args_left; | |
2565 | Lisp_Object numargs; | |
2566 | register Lisp_Object *arg_vector; | |
2567 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2568 | register int i; | |
2569 | register Lisp_Object tem; | |
2570 | ||
2571 | numargs = Flength (args); | |
2572 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2573 | args_left = args; | |
2574 | ||
2575 | GCPRO3 (*arg_vector, args_left, fun); | |
2576 | gcpro1.nvars = 0; | |
2577 | ||
2578 | for (i = 0; i < XINT (numargs);) | |
2579 | { | |
2580 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
2581 | if (eval_flag) tem = Feval (tem); | |
2582 | arg_vector[i++] = tem; | |
2583 | gcpro1.nvars = i; | |
2584 | } | |
2585 | ||
2586 | UNGCPRO; | |
2587 | ||
2588 | if (eval_flag) | |
2589 | { | |
2590 | backtrace_list->args = arg_vector; | |
2591 | backtrace_list->nargs = i; | |
2592 | } | |
2593 | backtrace_list->evalargs = 0; | |
2594 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
2595 | ||
2596 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
2597 | if (backtrace_list->debug_on_exit) | |
2598 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
2599 | /* Don't do it again when we return to eval. */ | |
2600 | backtrace_list->debug_on_exit = 0; | |
2601 | return tem; | |
2602 | } | |
2603 | ||
2604 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
2605 | and return the result of evaluation. | |
2606 | FUN must be either a lambda-expression or a compiled-code object. */ | |
2607 | ||
2608 | Lisp_Object | |
2609 | funcall_lambda (fun, nargs, arg_vector) | |
2610 | Lisp_Object fun; | |
2611 | int nargs; | |
2612 | register Lisp_Object *arg_vector; | |
2613 | { | |
2614 | Lisp_Object val, tem; | |
2615 | register Lisp_Object syms_left; | |
2616 | Lisp_Object numargs; | |
2617 | register Lisp_Object next; | |
2618 | int count = specpdl_ptr - specpdl; | |
2619 | register int i; | |
2620 | int optional = 0, rest = 0; | |
2621 | ||
2622 | specbind (Qmocklisp_arguments, Qt); /* t means NOT mocklisp! */ | |
2623 | ||
a631e24c | 2624 | XSETFASTINT (numargs, nargs); |
db9f0278 | 2625 | |
90165123 | 2626 | if (CONSP (fun)) |
db9f0278 | 2627 | syms_left = Fcar (Fcdr (fun)); |
90165123 | 2628 | else if (COMPILEDP (fun)) |
db9f0278 JB |
2629 | syms_left = XVECTOR (fun)->contents[COMPILED_ARGLIST]; |
2630 | else abort (); | |
2631 | ||
2632 | i = 0; | |
265a9e55 | 2633 | for (; !NILP (syms_left); syms_left = Fcdr (syms_left)) |
db9f0278 JB |
2634 | { |
2635 | QUIT; | |
2636 | next = Fcar (syms_left); | |
90165123 | 2637 | while (!SYMBOLP (next)) |
9ffa21d4 | 2638 | next = Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
db9f0278 JB |
2639 | if (EQ (next, Qand_rest)) |
2640 | rest = 1; | |
2641 | else if (EQ (next, Qand_optional)) | |
2642 | optional = 1; | |
2643 | else if (rest) | |
2644 | { | |
9ffa21d4 | 2645 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
2646 | i = nargs; |
2647 | } | |
2648 | else if (i < nargs) | |
2649 | { | |
2650 | tem = arg_vector[i++]; | |
2651 | specbind (next, tem); | |
2652 | } | |
2653 | else if (!optional) | |
2654 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
2655 | else | |
2656 | specbind (next, Qnil); | |
2657 | } | |
2658 | ||
2659 | if (i < nargs) | |
2660 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
2661 | ||
90165123 | 2662 | if (CONSP (fun)) |
db9f0278 JB |
2663 | val = Fprogn (Fcdr (Fcdr (fun))); |
2664 | else | |
ca248607 RS |
2665 | { |
2666 | /* If we have not actually read the bytecode string | |
2667 | and constants vector yet, fetch them from the file. */ | |
2668 | if (CONSP (XVECTOR (fun)->contents[COMPILED_BYTECODE])) | |
661c7d6e | 2669 | Ffetch_bytecode (fun); |
ca248607 RS |
2670 | val = Fbyte_code (XVECTOR (fun)->contents[COMPILED_BYTECODE], |
2671 | XVECTOR (fun)->contents[COMPILED_CONSTANTS], | |
2672 | XVECTOR (fun)->contents[COMPILED_STACK_DEPTH]); | |
2673 | } | |
db9f0278 JB |
2674 | return unbind_to (count, val); |
2675 | } | |
661c7d6e KH |
2676 | |
2677 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
2678 | 1, 1, 0, | |
2679 | "If byte-compiled OBJECT is lazy-loaded, fetch it now.") | |
2680 | (object) | |
2681 | Lisp_Object object; | |
2682 | { | |
2683 | Lisp_Object tem; | |
2684 | ||
2685 | if (COMPILEDP (object) | |
2686 | && CONSP (XVECTOR (object)->contents[COMPILED_BYTECODE])) | |
2687 | { | |
2688 | tem = read_doc_string (XVECTOR (object)->contents[COMPILED_BYTECODE]); | |
5bbdb090 RS |
2689 | if (!CONSP (tem)) |
2690 | error ("invalid byte code"); | |
03699b14 KR |
2691 | XVECTOR (object)->contents[COMPILED_BYTECODE] = XCAR (tem); |
2692 | XVECTOR (object)->contents[COMPILED_CONSTANTS] = XCDR (tem); | |
661c7d6e KH |
2693 | } |
2694 | return object; | |
2695 | } | |
db9f0278 JB |
2696 | \f |
2697 | void | |
2698 | grow_specpdl () | |
2699 | { | |
2700 | register int count = specpdl_ptr - specpdl; | |
2701 | if (specpdl_size >= max_specpdl_size) | |
2702 | { | |
2703 | if (max_specpdl_size < 400) | |
2704 | max_specpdl_size = 400; | |
2705 | if (specpdl_size >= max_specpdl_size) | |
2706 | { | |
debee8fe RS |
2707 | if (!NILP (Vdebug_on_error)) |
2708 | /* Leave room for some specpdl in the debugger. */ | |
2709 | max_specpdl_size = specpdl_size + 100; | |
db9f0278 JB |
2710 | Fsignal (Qerror, |
2711 | Fcons (build_string ("Variable binding depth exceeds max-specpdl-size"), Qnil)); | |
db9f0278 JB |
2712 | } |
2713 | } | |
2714 | specpdl_size *= 2; | |
2715 | if (specpdl_size > max_specpdl_size) | |
2716 | specpdl_size = max_specpdl_size; | |
2717 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
2718 | specpdl_ptr = specpdl + count; | |
2719 | } | |
2720 | ||
2721 | void | |
2722 | specbind (symbol, value) | |
2723 | Lisp_Object symbol, value; | |
2724 | { | |
db9f0278 JB |
2725 | Lisp_Object ovalue; |
2726 | ||
9ffa21d4 JB |
2727 | CHECK_SYMBOL (symbol, 0); |
2728 | ||
db9f0278 JB |
2729 | if (specpdl_ptr == specpdl + specpdl_size) |
2730 | grow_specpdl (); | |
2731 | specpdl_ptr->symbol = symbol; | |
2732 | specpdl_ptr->func = 0; | |
d0f7cdc8 | 2733 | specpdl_ptr->old_value = ovalue = find_symbol_value (symbol); |
db9f0278 | 2734 | specpdl_ptr++; |
3d8585a1 | 2735 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) |
db9f0278 JB |
2736 | store_symval_forwarding (symbol, ovalue, value); |
2737 | else | |
ab07bca0 | 2738 | set_internal (symbol, value, 1); |
db9f0278 JB |
2739 | } |
2740 | ||
2741 | void | |
2742 | record_unwind_protect (function, arg) | |
1d159538 | 2743 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
2744 | Lisp_Object arg; |
2745 | { | |
2746 | if (specpdl_ptr == specpdl + specpdl_size) | |
2747 | grow_specpdl (); | |
2748 | specpdl_ptr->func = function; | |
2749 | specpdl_ptr->symbol = Qnil; | |
2750 | specpdl_ptr->old_value = arg; | |
2751 | specpdl_ptr++; | |
2752 | } | |
2753 | ||
2754 | Lisp_Object | |
2755 | unbind_to (count, value) | |
2756 | int count; | |
2757 | Lisp_Object value; | |
2758 | { | |
265a9e55 | 2759 | int quitf = !NILP (Vquit_flag); |
db9f0278 JB |
2760 | struct gcpro gcpro1; |
2761 | ||
2762 | GCPRO1 (value); | |
2763 | ||
2764 | Vquit_flag = Qnil; | |
2765 | ||
2766 | while (specpdl_ptr != specpdl + count) | |
2767 | { | |
2768 | --specpdl_ptr; | |
2769 | if (specpdl_ptr->func != 0) | |
2770 | (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
2771 | /* Note that a "binding" of nil is really an unwind protect, | |
2772 | so in that case the "old value" is a list of forms to evaluate. */ | |
265a9e55 | 2773 | else if (NILP (specpdl_ptr->symbol)) |
db9f0278 JB |
2774 | Fprogn (specpdl_ptr->old_value); |
2775 | else | |
ab07bca0 | 2776 | set_internal (specpdl_ptr->symbol, specpdl_ptr->old_value, 1); |
db9f0278 | 2777 | } |
265a9e55 | 2778 | if (NILP (Vquit_flag) && quitf) Vquit_flag = Qt; |
db9f0278 JB |
2779 | |
2780 | UNGCPRO; | |
2781 | ||
2782 | return value; | |
2783 | } | |
2784 | \f | |
2785 | #if 0 | |
2786 | ||
2787 | /* Get the value of symbol's global binding, even if that binding | |
2788 | is not now dynamically visible. */ | |
2789 | ||
2790 | Lisp_Object | |
2791 | top_level_value (symbol) | |
2792 | Lisp_Object symbol; | |
2793 | { | |
2794 | register struct specbinding *ptr = specpdl; | |
2795 | ||
2796 | CHECK_SYMBOL (symbol, 0); | |
2797 | for (; ptr != specpdl_ptr; ptr++) | |
2798 | { | |
2799 | if (EQ (ptr->symbol, symbol)) | |
2800 | return ptr->old_value; | |
2801 | } | |
2802 | return Fsymbol_value (symbol); | |
2803 | } | |
2804 | ||
2805 | Lisp_Object | |
2806 | top_level_set (symbol, newval) | |
2807 | Lisp_Object symbol, newval; | |
2808 | { | |
2809 | register struct specbinding *ptr = specpdl; | |
2810 | ||
2811 | CHECK_SYMBOL (symbol, 0); | |
2812 | for (; ptr != specpdl_ptr; ptr++) | |
2813 | { | |
2814 | if (EQ (ptr->symbol, symbol)) | |
2815 | { | |
2816 | ptr->old_value = newval; | |
2817 | return newval; | |
2818 | } | |
2819 | } | |
2820 | return Fset (symbol, newval); | |
2821 | } | |
2822 | ||
2823 | #endif /* 0 */ | |
2824 | \f | |
2825 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, | |
2826 | "Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.\n\ | |
2827 | The debugger is entered when that frame exits, if the flag is non-nil.") | |
2828 | (level, flag) | |
2829 | Lisp_Object level, flag; | |
2830 | { | |
2831 | register struct backtrace *backlist = backtrace_list; | |
2832 | register int i; | |
2833 | ||
2834 | CHECK_NUMBER (level, 0); | |
2835 | ||
2836 | for (i = 0; backlist && i < XINT (level); i++) | |
2837 | { | |
2838 | backlist = backlist->next; | |
2839 | } | |
2840 | ||
2841 | if (backlist) | |
265a9e55 | 2842 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
2843 | |
2844 | return flag; | |
2845 | } | |
2846 | ||
2847 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
2848 | "Print a trace of Lisp function calls currently active.\n\ | |
2849 | Output stream used is value of `standard-output'.") | |
2850 | () | |
2851 | { | |
2852 | register struct backtrace *backlist = backtrace_list; | |
2853 | register int i; | |
2854 | Lisp_Object tail; | |
2855 | Lisp_Object tem; | |
2856 | extern Lisp_Object Vprint_level; | |
2857 | struct gcpro gcpro1; | |
2858 | ||
a631e24c | 2859 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
2860 | |
2861 | tail = Qnil; | |
2862 | GCPRO1 (tail); | |
2863 | ||
2864 | while (backlist) | |
2865 | { | |
2866 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
2867 | if (backlist->nargs == UNEVALLED) | |
2868 | { | |
2869 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 2870 | write_string ("\n", -1); |
db9f0278 JB |
2871 | } |
2872 | else | |
2873 | { | |
2874 | tem = *backlist->function; | |
2875 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
2876 | write_string ("(", -1); | |
2877 | if (backlist->nargs == MANY) | |
2878 | { | |
2879 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 2880 | !NILP (tail); |
db9f0278 JB |
2881 | tail = Fcdr (tail), i++) |
2882 | { | |
2883 | if (i) write_string (" ", -1); | |
2884 | Fprin1 (Fcar (tail), Qnil); | |
2885 | } | |
2886 | } | |
2887 | else | |
2888 | { | |
2889 | for (i = 0; i < backlist->nargs; i++) | |
2890 | { | |
2891 | if (i) write_string (" ", -1); | |
2892 | Fprin1 (backlist->args[i], Qnil); | |
2893 | } | |
2894 | } | |
b6703b02 | 2895 | write_string (")\n", -1); |
db9f0278 | 2896 | } |
db9f0278 JB |
2897 | backlist = backlist->next; |
2898 | } | |
2899 | ||
2900 | Vprint_level = Qnil; | |
2901 | UNGCPRO; | |
2902 | return Qnil; | |
2903 | } | |
2904 | ||
2905 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, "", | |
79e8bfbf | 2906 | "Return the function and arguments NFRAMES up from current execution point.\n\ |
db9f0278 JB |
2907 | If that frame has not evaluated the arguments yet (or is a special form),\n\ |
2908 | the value is (nil FUNCTION ARG-FORMS...).\n\ | |
2909 | If that frame has evaluated its arguments and called its function already,\n\ | |
2910 | the value is (t FUNCTION ARG-VALUES...).\n\ | |
2911 | A &rest arg is represented as the tail of the list ARG-VALUES.\n\ | |
2912 | FUNCTION is whatever was supplied as car of evaluated list,\n\ | |
2913 | or a lambda expression for macro calls.\n\ | |
79e8bfbf | 2914 | If NFRAMES is more than the number of frames, the value is nil.") |
db9f0278 JB |
2915 | (nframes) |
2916 | Lisp_Object nframes; | |
2917 | { | |
2918 | register struct backtrace *backlist = backtrace_list; | |
2919 | register int i; | |
2920 | Lisp_Object tem; | |
2921 | ||
2922 | CHECK_NATNUM (nframes, 0); | |
2923 | ||
2924 | /* Find the frame requested. */ | |
b6703b02 | 2925 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
2926 | backlist = backlist->next; |
2927 | ||
2928 | if (!backlist) | |
2929 | return Qnil; | |
2930 | if (backlist->nargs == UNEVALLED) | |
2931 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
2932 | else | |
2933 | { | |
2934 | if (backlist->nargs == MANY) | |
2935 | tem = *backlist->args; | |
2936 | else | |
2937 | tem = Flist (backlist->nargs, backlist->args); | |
2938 | ||
2939 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
2940 | } | |
2941 | } | |
2942 | \f | |
dfcf069d | 2943 | void |
db9f0278 JB |
2944 | syms_of_eval () |
2945 | { | |
2946 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
7eaada67 RS |
2947 | "*Limit on number of Lisp variable bindings & unwind-protects.\n\ |
2948 | If Lisp code tries to make more than this many at once,\n\ | |
2949 | an error is signaled."); | |
db9f0278 JB |
2950 | |
2951 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
7eaada67 | 2952 | "*Limit on depth in `eval', `apply' and `funcall' before error.\n\ |
db9f0278 JB |
2953 | This limit is to catch infinite recursions for you before they cause\n\ |
2954 | actual stack overflow in C, which would be fatal for Emacs.\n\ | |
2955 | You can safely make it considerably larger than its default value,\n\ | |
2956 | if that proves inconveniently small."); | |
2957 | ||
2958 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
2959 | "Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.\n\ | |
d0b68896 | 2960 | Typing C-g sets `quit-flag' non-nil, regardless of `inhibit-quit'."); |
db9f0278 JB |
2961 | Vquit_flag = Qnil; |
2962 | ||
2963 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
2964 | "Non-nil inhibits C-g quitting from happening immediately.\n\ | |
2965 | Note that `quit-flag' will still be set by typing C-g,\n\ | |
690337b7 | 2966 | so a quit will be signaled as soon as `inhibit-quit' is nil.\n\ |
db9f0278 JB |
2967 | To prevent this happening, set `quit-flag' to nil\n\ |
2968 | before making `inhibit-quit' nil."); | |
2969 | Vinhibit_quit = Qnil; | |
2970 | ||
ad236261 JB |
2971 | Qinhibit_quit = intern ("inhibit-quit"); |
2972 | staticpro (&Qinhibit_quit); | |
2973 | ||
db9f0278 JB |
2974 | Qautoload = intern ("autoload"); |
2975 | staticpro (&Qautoload); | |
2976 | ||
2977 | Qdebug_on_error = intern ("debug-on-error"); | |
2978 | staticpro (&Qdebug_on_error); | |
2979 | ||
2980 | Qmacro = intern ("macro"); | |
2981 | staticpro (&Qmacro); | |
2982 | ||
2983 | /* Note that the process handling also uses Qexit, but we don't want | |
2984 | to staticpro it twice, so we just do it here. */ | |
2985 | Qexit = intern ("exit"); | |
2986 | staticpro (&Qexit); | |
2987 | ||
2988 | Qinteractive = intern ("interactive"); | |
2989 | staticpro (&Qinteractive); | |
2990 | ||
2991 | Qcommandp = intern ("commandp"); | |
2992 | staticpro (&Qcommandp); | |
2993 | ||
2994 | Qdefun = intern ("defun"); | |
2995 | staticpro (&Qdefun); | |
2996 | ||
2997 | Qand_rest = intern ("&rest"); | |
2998 | staticpro (&Qand_rest); | |
2999 | ||
3000 | Qand_optional = intern ("&optional"); | |
3001 | staticpro (&Qand_optional); | |
3002 | ||
128c0f66 | 3003 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
db9f0278 | 3004 | "*Non-nil means automatically display a backtrace buffer\n\ |
128c0f66 RM |
3005 | after any error that is handled by the editor command loop.\n\ |
3006 | If the value is a list, an error only means to display a backtrace\n\ | |
3007 | if one of its condition symbols appears in the list."); | |
3008 | Vstack_trace_on_error = Qnil; | |
db9f0278 | 3009 | |
128c0f66 | 3010 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
db9f0278 JB |
3011 | "*Non-nil means enter debugger if an error is signaled.\n\ |
3012 | Does not apply to errors handled by `condition-case'.\n\ | |
128c0f66 RM |
3013 | If the value is a list, an error only means to enter the debugger\n\ |
3014 | if one of its condition symbols appears in the list.\n\ | |
db9f0278 | 3015 | See also variable `debug-on-quit'."); |
128c0f66 | 3016 | Vdebug_on_error = Qnil; |
db9f0278 | 3017 | |
fc950e09 KH |
3018 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
3019 | "*List of errors for which the debugger should not be called.\n\ | |
3020 | Each element may be a condition-name or a regexp that matches error messages.\n\ | |
3021 | If any element applies to a given error, that error skips the debugger\n\ | |
3022 | and just returns to top level.\n\ | |
3023 | This overrides the variable `debug-on-error'.\n\ | |
3024 | It does not apply to errors handled by `condition-case'."); | |
3025 | Vdebug_ignored_errors = Qnil; | |
3026 | ||
db9f0278 | 3027 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
d0b68896 | 3028 | "*Non-nil means enter debugger if quit is signaled (C-g, for example).\n\ |
1b7d8239 | 3029 | Does not apply if quit is handled by a `condition-case'."); |
db9f0278 JB |
3030 | debug_on_quit = 0; |
3031 | ||
3032 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
3033 | "Non-nil means enter debugger before next `eval', `apply' or `funcall'."); | |
3034 | ||
3035 | DEFVAR_LISP ("debugger", &Vdebugger, | |
3036 | "Function to call to invoke debugger.\n\ | |
3037 | If due to frame exit, args are `exit' and the value being returned;\n\ | |
3038 | this function's value will be returned instead of that.\n\ | |
3039 | If due to error, args are `error' and a list of the args to `signal'.\n\ | |
3040 | If due to `apply' or `funcall' entry, one arg, `lambda'.\n\ | |
3041 | If due to `eval' entry, one arg, t."); | |
3042 | Vdebugger = Qnil; | |
3043 | ||
61ede770 RS |
3044 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
3045 | "If non-nil, this is a function for `signal' to call.\n\ | |
3046 | It receives the same arguments that `signal' was given.\n\ | |
3047 | The Edebug package uses this to regain control."); | |
3048 | Vsignal_hook_function = Qnil; | |
3049 | ||
db9f0278 JB |
3050 | Qmocklisp_arguments = intern ("mocklisp-arguments"); |
3051 | staticpro (&Qmocklisp_arguments); | |
3052 | DEFVAR_LISP ("mocklisp-arguments", &Vmocklisp_arguments, | |
3053 | "While in a mocklisp function, the list of its unevaluated args."); | |
3054 | Vmocklisp_arguments = Qt; | |
3055 | ||
57a6e758 | 3056 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
61ede770 RS |
3057 | "*Non-nil means call the debugger regardless of condition handlers.\n\ |
3058 | Note that `debug-on-error', `debug-on-quit' and friends\n\ | |
3059 | still determine whether to handle the particular condition."); | |
57a6e758 | 3060 | Vdebug_on_signal = Qnil; |
61ede770 | 3061 | |
6e6e9f08 RS |
3062 | Vrun_hooks = intern ("run-hooks"); |
3063 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3064 | |
3065 | staticpro (&Vautoload_queue); | |
3066 | Vautoload_queue = Qnil; | |
3067 | ||
3068 | defsubr (&Sor); | |
3069 | defsubr (&Sand); | |
3070 | defsubr (&Sif); | |
3071 | defsubr (&Scond); | |
3072 | defsubr (&Sprogn); | |
3073 | defsubr (&Sprog1); | |
3074 | defsubr (&Sprog2); | |
3075 | defsubr (&Ssetq); | |
3076 | defsubr (&Squote); | |
3077 | defsubr (&Sfunction); | |
3078 | defsubr (&Sdefun); | |
3079 | defsubr (&Sdefmacro); | |
3080 | defsubr (&Sdefvar); | |
3081 | defsubr (&Sdefconst); | |
3082 | defsubr (&Suser_variable_p); | |
3083 | defsubr (&Slet); | |
3084 | defsubr (&SletX); | |
3085 | defsubr (&Swhile); | |
3086 | defsubr (&Smacroexpand); | |
3087 | defsubr (&Scatch); | |
3088 | defsubr (&Sthrow); | |
3089 | defsubr (&Sunwind_protect); | |
3090 | defsubr (&Scondition_case); | |
3091 | defsubr (&Ssignal); | |
3092 | defsubr (&Sinteractive_p); | |
3093 | defsubr (&Scommandp); | |
3094 | defsubr (&Sautoload); | |
3095 | defsubr (&Seval); | |
3096 | defsubr (&Sapply); | |
3097 | defsubr (&Sfuncall); | |
ff936e53 SM |
3098 | defsubr (&Srun_hooks); |
3099 | defsubr (&Srun_hook_with_args); | |
3100 | defsubr (&Srun_hook_with_args_until_success); | |
3101 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3102 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3103 | defsubr (&Sbacktrace_debug); |
3104 | defsubr (&Sbacktrace); | |
3105 | defsubr (&Sbacktrace_frame); | |
3106 | } |