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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> |
db9f0278 | 23 | #include "lisp.h" |
9ac0d9e0 | 24 | #include "blockinput.h" |
db9f0278 | 25 | #include "commands.h" |
1f98fa48 | 26 | #include "keyboard.h" |
3648c842 | 27 | #include "dispextern.h" |
db9f0278 JB |
28 | #include <setjmp.h> |
29 | ||
30 | /* This definition is duplicated in alloc.c and keyboard.c */ | |
31 | /* Putting it in lisp.h makes cc bomb out! */ | |
32 | ||
33 | struct backtrace | |
34 | { | |
35 | struct backtrace *next; | |
36 | Lisp_Object *function; | |
37 | Lisp_Object *args; /* Points to vector of args. */ | |
daa37602 JB |
38 | int nargs; /* Length of vector. |
39 | If nargs is UNEVALLED, args points to slot holding | |
40 | list of unevalled args */ | |
db9f0278 JB |
41 | char evalargs; |
42 | /* Nonzero means call value of debugger when done with this operation. */ | |
43 | char debug_on_exit; | |
44 | }; | |
45 | ||
46 | struct backtrace *backtrace_list; | |
47 | ||
82da7701 JB |
48 | /* This structure helps implement the `catch' and `throw' control |
49 | structure. A struct catchtag contains all the information needed | |
50 | to restore the state of the interpreter after a non-local jump. | |
51 | ||
52 | Handlers for error conditions (represented by `struct handler' | |
53 | structures) just point to a catch tag to do the cleanup required | |
54 | for their jumps. | |
55 | ||
56 | catchtag structures are chained together in the C calling stack; | |
57 | the `next' member points to the next outer catchtag. | |
58 | ||
59 | A call like (throw TAG VAL) searches for a catchtag whose `tag' | |
60 | member is TAG, and then unbinds to it. The `val' member is used to | |
61 | hold VAL while the stack is unwound; `val' is returned as the value | |
62 | of the catch form. | |
63 | ||
64 | All the other members are concerned with restoring the interpreter | |
65 | state. */ | |
db9f0278 JB |
66 | struct catchtag |
67 | { | |
68 | Lisp_Object tag; | |
69 | Lisp_Object val; | |
70 | struct catchtag *next; | |
71 | struct gcpro *gcpro; | |
72 | jmp_buf jmp; | |
73 | struct backtrace *backlist; | |
74 | struct handler *handlerlist; | |
75 | int lisp_eval_depth; | |
76 | int pdlcount; | |
77 | int poll_suppress_count; | |
bcf28080 | 78 | struct byte_stack *byte_stack; |
db9f0278 JB |
79 | }; |
80 | ||
81 | struct catchtag *catchlist; | |
82 | ||
15934ffa RS |
83 | #ifdef DEBUG_GCPRO |
84 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
85 | int gcpro_level; | |
86 | #endif | |
87 | ||
db9f0278 | 88 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
ad236261 | 89 | Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag; |
db9f0278 JB |
90 | Lisp_Object Qmocklisp_arguments, Vmocklisp_arguments, Qmocklisp; |
91 | Lisp_Object Qand_rest, Qand_optional; | |
92 | Lisp_Object Qdebug_on_error; | |
93 | ||
6e6e9f08 RS |
94 | /* This holds either the symbol `run-hooks' or nil. |
95 | It is nil at an early stage of startup, and when Emacs | |
96 | is shutting down. */ | |
db9f0278 JB |
97 | Lisp_Object Vrun_hooks; |
98 | ||
99 | /* Non-nil means record all fset's and provide's, to be undone | |
100 | if the file being autoloaded is not fully loaded. | |
101 | They are recorded by being consed onto the front of Vautoload_queue: | |
102 | (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
103 | ||
104 | Lisp_Object Vautoload_queue; | |
105 | ||
106 | /* Current number of specbindings allocated in specpdl. */ | |
107 | int specpdl_size; | |
108 | ||
109 | /* Pointer to beginning of specpdl. */ | |
110 | struct specbinding *specpdl; | |
111 | ||
112 | /* Pointer to first unused element in specpdl. */ | |
113 | struct specbinding *specpdl_ptr; | |
114 | ||
115 | /* Maximum size allowed for specpdl allocation */ | |
116 | int max_specpdl_size; | |
117 | ||
118 | /* Depth in Lisp evaluations and function calls. */ | |
119 | int lisp_eval_depth; | |
120 | ||
121 | /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
122 | int max_lisp_eval_depth; | |
123 | ||
124 | /* Nonzero means enter debugger before next function call */ | |
125 | int debug_on_next_call; | |
126 | ||
556d7314 GM |
127 | /* Non-zero means debuffer may continue. This is zero when the |
128 | debugger is called during redisplay, where it might not be safe to | |
129 | continue the interrupted redisplay. */ | |
130 | ||
131 | int debugger_may_continue; | |
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 | { | |
3648c842 | 205 | int debug_while_redisplaying; |
556d7314 | 206 | int count = specpdl_ptr - specpdl; |
3648c842 GM |
207 | Lisp_Object val; |
208 | ||
db9f0278 JB |
209 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
210 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
3648c842 | 211 | |
db9f0278 JB |
212 | if (specpdl_size + 40 > max_specpdl_size) |
213 | max_specpdl_size = specpdl_size + 40; | |
3648c842 | 214 | |
db9f0278 | 215 | debug_on_next_call = 0; |
be857679 | 216 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
217 | |
218 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
219 | displayed if the debugger is invoked during redisplay. */ | |
220 | debug_while_redisplaying = redisplaying_p; | |
221 | redisplaying_p = 0; | |
556d7314 GM |
222 | specbind (intern ("debugger-may-continue"), |
223 | debug_while_redisplaying ? Qnil : Qt); | |
3648c842 GM |
224 | |
225 | val = apply1 (Vdebugger, arg); | |
226 | ||
227 | /* Interrupting redisplay and resuming it later is not safe under | |
228 | all circumstances. So, when the debugger returns, abort the | |
229 | interupted redisplay by going back to the top-level. */ | |
230 | if (debug_while_redisplaying) | |
231 | Ftop_level (); | |
232 | ||
556d7314 | 233 | return unbind_to (count, val); |
db9f0278 JB |
234 | } |
235 | ||
dfcf069d | 236 | void |
db9f0278 JB |
237 | do_debug_on_call (code) |
238 | Lisp_Object code; | |
239 | { | |
240 | debug_on_next_call = 0; | |
241 | backtrace_list->debug_on_exit = 1; | |
242 | call_debugger (Fcons (code, Qnil)); | |
243 | } | |
244 | \f | |
245 | /* NOTE!!! Every function that can call EVAL must protect its args | |
246 | and temporaries from garbage collection while it needs them. | |
247 | The definition of `For' shows what you have to do. */ | |
248 | ||
249 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
250 | "Eval args until one of them yields non-nil, then return that value.\n\ | |
251 | The remaining args are not evalled at all.\n\ | |
252 | If all args return nil, return nil.") | |
253 | (args) | |
254 | Lisp_Object args; | |
255 | { | |
256 | register Lisp_Object val; | |
257 | Lisp_Object args_left; | |
258 | struct gcpro gcpro1; | |
259 | ||
265a9e55 | 260 | if (NILP(args)) |
db9f0278 JB |
261 | return Qnil; |
262 | ||
263 | args_left = args; | |
264 | GCPRO1 (args_left); | |
265 | ||
266 | do | |
267 | { | |
268 | val = Feval (Fcar (args_left)); | |
265a9e55 | 269 | if (!NILP (val)) |
db9f0278 JB |
270 | break; |
271 | args_left = Fcdr (args_left); | |
272 | } | |
265a9e55 | 273 | while (!NILP(args_left)); |
db9f0278 JB |
274 | |
275 | UNGCPRO; | |
276 | return val; | |
277 | } | |
278 | ||
279 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
280 | "Eval args until one of them yields nil, then return nil.\n\ | |
281 | The remaining args are not evalled at all.\n\ | |
282 | If no arg yields nil, return the last arg's value.") | |
283 | (args) | |
284 | Lisp_Object args; | |
285 | { | |
286 | register Lisp_Object val; | |
287 | Lisp_Object args_left; | |
288 | struct gcpro gcpro1; | |
289 | ||
265a9e55 | 290 | if (NILP(args)) |
db9f0278 JB |
291 | return Qt; |
292 | ||
293 | args_left = args; | |
294 | GCPRO1 (args_left); | |
295 | ||
296 | do | |
297 | { | |
298 | val = Feval (Fcar (args_left)); | |
265a9e55 | 299 | if (NILP (val)) |
db9f0278 JB |
300 | break; |
301 | args_left = Fcdr (args_left); | |
302 | } | |
265a9e55 | 303 | while (!NILP(args_left)); |
db9f0278 JB |
304 | |
305 | UNGCPRO; | |
306 | return val; | |
307 | } | |
308 | ||
309 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
310 | "(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...\n\ | |
311 | Returns the value of THEN or the value of the last of the ELSE's.\n\ | |
312 | THEN must be one expression, but ELSE... can be zero or more expressions.\n\ | |
313 | If COND yields nil, and there are no ELSE's, the value is nil.") | |
314 | (args) | |
315 | Lisp_Object args; | |
316 | { | |
317 | register Lisp_Object cond; | |
318 | struct gcpro gcpro1; | |
319 | ||
320 | GCPRO1 (args); | |
321 | cond = Feval (Fcar (args)); | |
322 | UNGCPRO; | |
323 | ||
265a9e55 | 324 | if (!NILP (cond)) |
db9f0278 JB |
325 | return Feval (Fcar (Fcdr (args))); |
326 | return Fprogn (Fcdr (Fcdr (args))); | |
327 | } | |
328 | ||
329 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
330 | "(cond CLAUSES...): try each clause until one succeeds.\n\ | |
331 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated\n\ | |
332 | and, if the value is non-nil, this clause succeeds:\n\ | |
333 | then the expressions in BODY are evaluated and the last one's\n\ | |
334 | value is the value of the cond-form.\n\ | |
335 | If no clause succeeds, cond returns nil.\n\ | |
336 | If a clause has one element, as in (CONDITION),\n\ | |
337 | CONDITION's value if non-nil is returned from the cond-form.") | |
338 | (args) | |
339 | Lisp_Object args; | |
340 | { | |
341 | register Lisp_Object clause, val; | |
342 | struct gcpro gcpro1; | |
343 | ||
344 | val = Qnil; | |
345 | GCPRO1 (args); | |
265a9e55 | 346 | while (!NILP (args)) |
db9f0278 JB |
347 | { |
348 | clause = Fcar (args); | |
349 | val = Feval (Fcar (clause)); | |
265a9e55 | 350 | if (!NILP (val)) |
db9f0278 | 351 | { |
03699b14 KR |
352 | if (!EQ (XCDR (clause), Qnil)) |
353 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
354 | break; |
355 | } | |
03699b14 | 356 | args = XCDR (args); |
db9f0278 JB |
357 | } |
358 | UNGCPRO; | |
359 | ||
360 | return val; | |
361 | } | |
362 | ||
363 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
364 | "(progn BODY...): eval BODY forms sequentially and return value of last one.") | |
365 | (args) | |
366 | Lisp_Object args; | |
367 | { | |
368 | register Lisp_Object val, tem; | |
369 | Lisp_Object args_left; | |
370 | struct gcpro gcpro1; | |
371 | ||
372 | /* In Mocklisp code, symbols at the front of the progn arglist | |
373 | are to be bound to zero. */ | |
374 | if (!EQ (Vmocklisp_arguments, Qt)) | |
375 | { | |
376 | val = make_number (0); | |
90165123 | 377 | while (!NILP (args) && (tem = Fcar (args), SYMBOLP (tem))) |
db9f0278 JB |
378 | { |
379 | QUIT; | |
380 | specbind (tem, val), args = Fcdr (args); | |
381 | } | |
382 | } | |
383 | ||
265a9e55 | 384 | if (NILP(args)) |
db9f0278 JB |
385 | return Qnil; |
386 | ||
387 | args_left = args; | |
388 | GCPRO1 (args_left); | |
389 | ||
390 | do | |
391 | { | |
392 | val = Feval (Fcar (args_left)); | |
393 | args_left = Fcdr (args_left); | |
394 | } | |
265a9e55 | 395 | while (!NILP(args_left)); |
db9f0278 JB |
396 | |
397 | UNGCPRO; | |
398 | return val; | |
399 | } | |
400 | ||
401 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
402 | "(prog1 FIRST BODY...): eval FIRST and BODY sequentially; value from FIRST.\n\ | |
403 | The value of FIRST is saved during the evaluation of the remaining args,\n\ | |
404 | whose values are discarded.") | |
405 | (args) | |
406 | Lisp_Object args; | |
407 | { | |
408 | Lisp_Object val; | |
409 | register Lisp_Object args_left; | |
410 | struct gcpro gcpro1, gcpro2; | |
411 | register int argnum = 0; | |
412 | ||
265a9e55 | 413 | if (NILP(args)) |
db9f0278 JB |
414 | return Qnil; |
415 | ||
416 | args_left = args; | |
417 | val = Qnil; | |
418 | GCPRO2 (args, val); | |
419 | ||
420 | do | |
421 | { | |
422 | if (!(argnum++)) | |
423 | val = Feval (Fcar (args_left)); | |
424 | else | |
425 | Feval (Fcar (args_left)); | |
426 | args_left = Fcdr (args_left); | |
427 | } | |
265a9e55 | 428 | while (!NILP(args_left)); |
db9f0278 JB |
429 | |
430 | UNGCPRO; | |
431 | return val; | |
432 | } | |
433 | ||
434 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
877b578f | 435 | "(prog2 X Y BODY...): eval X, Y and BODY sequentially; value from Y.\n\ |
db9f0278 JB |
436 | The value of Y is saved during the evaluation of the remaining args,\n\ |
437 | whose values are discarded.") | |
438 | (args) | |
439 | Lisp_Object args; | |
440 | { | |
441 | Lisp_Object val; | |
442 | register Lisp_Object args_left; | |
443 | struct gcpro gcpro1, gcpro2; | |
444 | register int argnum = -1; | |
445 | ||
446 | val = Qnil; | |
447 | ||
87d238ba | 448 | if (NILP (args)) |
db9f0278 JB |
449 | return Qnil; |
450 | ||
451 | args_left = args; | |
452 | val = Qnil; | |
453 | GCPRO2 (args, val); | |
454 | ||
455 | do | |
456 | { | |
457 | if (!(argnum++)) | |
458 | val = Feval (Fcar (args_left)); | |
459 | else | |
460 | Feval (Fcar (args_left)); | |
461 | args_left = Fcdr (args_left); | |
462 | } | |
87d238ba | 463 | while (!NILP (args_left)); |
db9f0278 JB |
464 | |
465 | UNGCPRO; | |
466 | return val; | |
467 | } | |
468 | ||
469 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
470 | "(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.\n\ | |
b0d75191 RS |
471 | The symbols SYM are variables; they are literal (not evaluated).\n\ |
472 | The values VAL are expressions; they are evaluated.\n\ | |
473 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.\n\ | |
474 | The second VAL is not computed until after the first SYM is set, and so on;\n\ | |
475 | each VAL can use the new value of variables set earlier in the `setq'.\n\ | |
196e7d3f | 476 | The return value of the `setq' form is the value of the last VAL.") |
db9f0278 JB |
477 | (args) |
478 | Lisp_Object args; | |
479 | { | |
480 | register Lisp_Object args_left; | |
481 | register Lisp_Object val, sym; | |
482 | struct gcpro gcpro1; | |
483 | ||
265a9e55 | 484 | if (NILP(args)) |
db9f0278 JB |
485 | return Qnil; |
486 | ||
487 | args_left = args; | |
488 | GCPRO1 (args); | |
489 | ||
490 | do | |
491 | { | |
492 | val = Feval (Fcar (Fcdr (args_left))); | |
493 | sym = Fcar (args_left); | |
494 | Fset (sym, val); | |
495 | args_left = Fcdr (Fcdr (args_left)); | |
496 | } | |
265a9e55 | 497 | while (!NILP(args_left)); |
db9f0278 JB |
498 | |
499 | UNGCPRO; | |
500 | return val; | |
501 | } | |
502 | ||
503 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, | |
504 | "Return the argument, without evaluating it. `(quote x)' yields `x'.") | |
505 | (args) | |
506 | Lisp_Object args; | |
507 | { | |
508 | return Fcar (args); | |
509 | } | |
510 | ||
511 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, | |
512 | "Like `quote', but preferred for objects which are functions.\n\ | |
513 | In byte compilation, `function' causes its argument to be compiled.\n\ | |
514 | `quote' cannot do that.") | |
515 | (args) | |
516 | Lisp_Object args; | |
517 | { | |
518 | return Fcar (args); | |
519 | } | |
520 | ||
521 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, | |
522 | "Return t if function in which this appears was called interactively.\n\ | |
523 | This means that the function was called with call-interactively (which\n\ | |
524 | includes being called as the binding of a key)\n\ | |
525 | and input is currently coming from the keyboard (not in keyboard macro).") | |
526 | () | |
527 | { | |
528 | register struct backtrace *btp; | |
529 | register Lisp_Object fun; | |
530 | ||
531 | if (!INTERACTIVE) | |
532 | return Qnil; | |
533 | ||
db9f0278 | 534 | btp = backtrace_list; |
daa37602 JB |
535 | |
536 | /* If this isn't a byte-compiled function, there may be a frame at | |
537 | the top for Finteractive_p itself. If so, skip it. */ | |
538 | fun = Findirect_function (*btp->function); | |
0598f773 | 539 | if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) |
db9f0278 | 540 | btp = btp->next; |
daa37602 JB |
541 | |
542 | /* If we're running an Emacs 18-style byte-compiled function, there | |
543 | may be a frame for Fbytecode. Now, given the strictest | |
544 | definition, this function isn't really being called | |
545 | interactively, but because that's the way Emacs 18 always builds | |
546 | byte-compiled functions, we'll accept it for now. */ | |
547 | if (EQ (*btp->function, Qbytecode)) | |
548 | btp = btp->next; | |
549 | ||
550 | /* If this isn't a byte-compiled function, then we may now be | |
551 | looking at several frames for special forms. Skip past them. */ | |
552 | while (btp && | |
553 | btp->nargs == UNEVALLED) | |
a6e3fa71 JB |
554 | btp = btp->next; |
555 | ||
daa37602 JB |
556 | /* btp now points at the frame of the innermost function that isn't |
557 | a special form, ignoring frames for Finteractive_p and/or | |
558 | Fbytecode at the top. If this frame is for a built-in function | |
559 | (such as load or eval-region) return nil. */ | |
ffd56f97 | 560 | fun = Findirect_function (*btp->function); |
90165123 | 561 | if (SUBRP (fun)) |
db9f0278 JB |
562 | return Qnil; |
563 | /* btp points to the frame of a Lisp function that called interactive-p. | |
564 | Return t if that function was called interactively. */ | |
565 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
566 | return Qt; | |
567 | return Qnil; | |
568 | } | |
569 | ||
570 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, | |
571 | "(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.\n\ | |
572 | The definition is (lambda ARGLIST [DOCSTRING] BODY...).\n\ | |
573 | See also the function `interactive'.") | |
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 (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 ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
590 | "(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.\n\ | |
591 | The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).\n\ | |
592 | When the macro is called, as in (NAME ARGS...),\n\ | |
593 | the function (lambda ARGLIST BODY...) is applied to\n\ | |
594 | the list ARGS... as it appears in the expression,\n\ | |
595 | and the result should be a form to be evaluated instead of the original.") | |
596 | (args) | |
597 | Lisp_Object args; | |
598 | { | |
599 | register Lisp_Object fn_name; | |
600 | register Lisp_Object defn; | |
601 | ||
602 | fn_name = Fcar (args); | |
603 | defn = Fcons (Qmacro, Fcons (Qlambda, Fcdr (args))); | |
265a9e55 | 604 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
605 | defn = Fpurecopy (defn); |
606 | Ffset (fn_name, defn); | |
2a49b6e5 | 607 | LOADHIST_ATTACH (fn_name); |
db9f0278 JB |
608 | return fn_name; |
609 | } | |
610 | ||
611 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, | |
612 | "(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.\n\ | |
613 | You are not required to define a variable in order to use it,\n\ | |
614 | but the definition can supply documentation and an initial value\n\ | |
615 | in a way that tags can recognize.\n\n\ | |
616 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void.\n\ | |
06ef7355 RS |
617 | If SYMBOL is buffer-local, its default value is what is set;\n\ |
618 | buffer-local values are not affected.\n\ | |
db9f0278 JB |
619 | INITVALUE and DOCSTRING are optional.\n\ |
620 | If DOCSTRING starts with *, this variable is identified as a user option.\n\ | |
621 | This means that M-x set-variable and M-x edit-options recognize it.\n\ | |
622 | If INITVALUE is missing, SYMBOL's value is not set.") | |
623 | (args) | |
624 | Lisp_Object args; | |
625 | { | |
a42ba017 | 626 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
627 | |
628 | sym = Fcar (args); | |
a42ba017 RS |
629 | tail = Fcdr (args); |
630 | if (!NILP (Fcdr (Fcdr (tail)))) | |
631 | error ("too many arguments"); | |
632 | ||
633 | if (!NILP (tail)) | |
db9f0278 JB |
634 | { |
635 | tem = Fdefault_boundp (sym); | |
265a9e55 | 636 | if (NILP (tem)) |
db9f0278 JB |
637 | Fset_default (sym, Feval (Fcar (Fcdr (args)))); |
638 | } | |
a42ba017 RS |
639 | tail = Fcdr (Fcdr (args)); |
640 | if (!NILP (Fcar (tail))) | |
db9f0278 | 641 | { |
ca248607 | 642 | tem = Fcar (tail); |
265a9e55 | 643 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
644 | tem = Fpurecopy (tem); |
645 | Fput (sym, Qvariable_documentation, tem); | |
646 | } | |
2a49b6e5 | 647 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
648 | return sym; |
649 | } | |
650 | ||
651 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
652 | "(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant variable.\n\ | |
c569512a | 653 | The intent is that neither programs nor users should ever change this value.\n\ |
db9f0278 | 654 | Always sets the value of SYMBOL to the result of evalling INITVALUE.\n\ |
06ef7355 RS |
655 | If SYMBOL is buffer-local, its default value is what is set;\n\ |
656 | buffer-local values are not affected.\n\ | |
701b1ec2 | 657 | DOCSTRING is optional.") |
db9f0278 JB |
658 | (args) |
659 | Lisp_Object args; | |
660 | { | |
661 | register Lisp_Object sym, tem; | |
662 | ||
663 | sym = Fcar (args); | |
a42ba017 RS |
664 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
665 | error ("too many arguments"); | |
666 | ||
db9f0278 JB |
667 | Fset_default (sym, Feval (Fcar (Fcdr (args)))); |
668 | tem = Fcar (Fcdr (Fcdr (args))); | |
265a9e55 | 669 | if (!NILP (tem)) |
db9f0278 | 670 | { |
265a9e55 | 671 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
672 | tem = Fpurecopy (tem); |
673 | Fput (sym, Qvariable_documentation, tem); | |
674 | } | |
2a49b6e5 | 675 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
676 | return sym; |
677 | } | |
678 | ||
679 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, | |
680 | "Returns t if VARIABLE is intended to be set and modified by users.\n\ | |
681 | \(The alternative is a variable used internally in a Lisp program.)\n\ | |
682 | Determined by whether the first character of the documentation\n\ | |
caff32a7 DL |
683 | for the variable is `*' or if the variable is customizable (has a non-nil\n\ |
684 | value of any of `custom-type', `custom-loads' or `standard-value'\n\ | |
685 | on its property list).") | |
db9f0278 JB |
686 | (variable) |
687 | Lisp_Object variable; | |
688 | { | |
689 | Lisp_Object documentation; | |
690 | ||
5e78e475 RS |
691 | if (!SYMBOLP (variable)) |
692 | return Qnil; | |
693 | ||
db9f0278 | 694 | documentation = Fget (variable, Qvariable_documentation); |
90165123 | 695 | if (INTEGERP (documentation) && XINT (documentation) < 0) |
db9f0278 | 696 | return Qt; |
65411977 RS |
697 | if (STRINGP (documentation) |
698 | && ((unsigned char) XSTRING (documentation)->data[0] == '*')) | |
699 | return Qt; | |
700 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
701 | if (CONSP (documentation) | |
03699b14 KR |
702 | && STRINGP (XCAR (documentation)) |
703 | && INTEGERP (XCDR (documentation)) | |
704 | && XINT (XCDR (documentation)) < 0) | |
db9f0278 | 705 | return Qt; |
caff32a7 DL |
706 | /* Customizable? */ |
707 | if ((!NILP (Fget (variable, intern ("custom-type")))) | |
708 | || (!NILP (Fget (variable, intern ("custom-loads")))) | |
709 | || (!NILP (Fget (variable, intern ("standard-value"))))) | |
710 | return Qt; | |
db9f0278 JB |
711 | return Qnil; |
712 | } | |
713 | \f | |
714 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
715 | "(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.\n\ | |
716 | The value of the last form in BODY is returned.\n\ | |
717 | Each element of VARLIST is a symbol (which is bound to nil)\n\ | |
718 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\ | |
719 | Each VALUEFORM can refer to the symbols already bound by this VARLIST.") | |
720 | (args) | |
721 | Lisp_Object args; | |
722 | { | |
723 | Lisp_Object varlist, val, elt; | |
724 | int count = specpdl_ptr - specpdl; | |
725 | struct gcpro gcpro1, gcpro2, gcpro3; | |
726 | ||
727 | GCPRO3 (args, elt, varlist); | |
728 | ||
729 | varlist = Fcar (args); | |
265a9e55 | 730 | while (!NILP (varlist)) |
db9f0278 JB |
731 | { |
732 | QUIT; | |
733 | elt = Fcar (varlist); | |
90165123 | 734 | if (SYMBOLP (elt)) |
db9f0278 | 735 | specbind (elt, Qnil); |
08564963 JB |
736 | else if (! NILP (Fcdr (Fcdr (elt)))) |
737 | Fsignal (Qerror, | |
738 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
739 | elt)); | |
db9f0278 JB |
740 | else |
741 | { | |
742 | val = Feval (Fcar (Fcdr (elt))); | |
743 | specbind (Fcar (elt), val); | |
744 | } | |
745 | varlist = Fcdr (varlist); | |
746 | } | |
747 | UNGCPRO; | |
748 | val = Fprogn (Fcdr (args)); | |
749 | return unbind_to (count, val); | |
750 | } | |
751 | ||
752 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
753 | "(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.\n\ | |
754 | The value of the last form in BODY is returned.\n\ | |
755 | Each element of VARLIST is a symbol (which is bound to nil)\n\ | |
756 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\ | |
757 | All the VALUEFORMs are evalled before any symbols are bound.") | |
758 | (args) | |
759 | Lisp_Object args; | |
760 | { | |
761 | Lisp_Object *temps, tem; | |
762 | register Lisp_Object elt, varlist; | |
763 | int count = specpdl_ptr - specpdl; | |
764 | register int argnum; | |
765 | struct gcpro gcpro1, gcpro2; | |
766 | ||
767 | varlist = Fcar (args); | |
768 | ||
769 | /* Make space to hold the values to give the bound variables */ | |
770 | elt = Flength (varlist); | |
771 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
772 | ||
773 | /* Compute the values and store them in `temps' */ | |
774 | ||
775 | GCPRO2 (args, *temps); | |
776 | gcpro2.nvars = 0; | |
777 | ||
265a9e55 | 778 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
779 | { |
780 | QUIT; | |
781 | elt = Fcar (varlist); | |
90165123 | 782 | if (SYMBOLP (elt)) |
db9f0278 | 783 | temps [argnum++] = Qnil; |
08564963 JB |
784 | else if (! NILP (Fcdr (Fcdr (elt)))) |
785 | Fsignal (Qerror, | |
786 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
787 | elt)); | |
db9f0278 JB |
788 | else |
789 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
790 | gcpro2.nvars = argnum; | |
791 | } | |
792 | UNGCPRO; | |
793 | ||
794 | varlist = Fcar (args); | |
265a9e55 | 795 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
796 | { |
797 | elt = Fcar (varlist); | |
798 | tem = temps[argnum++]; | |
90165123 | 799 | if (SYMBOLP (elt)) |
db9f0278 JB |
800 | specbind (elt, tem); |
801 | else | |
802 | specbind (Fcar (elt), tem); | |
803 | } | |
804 | ||
805 | elt = Fprogn (Fcdr (args)); | |
806 | return unbind_to (count, elt); | |
807 | } | |
808 | ||
809 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
810 | "(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.\n\ | |
811 | The order of execution is thus TEST, BODY, TEST, BODY and so on\n\ | |
812 | until TEST returns nil.") | |
813 | (args) | |
814 | Lisp_Object args; | |
815 | { | |
816 | Lisp_Object test, body, tem; | |
817 | struct gcpro gcpro1, gcpro2; | |
818 | ||
819 | GCPRO2 (test, body); | |
820 | ||
821 | test = Fcar (args); | |
822 | body = Fcdr (args); | |
e3c24a74 RS |
823 | while (tem = Feval (test), |
824 | (!EQ (Vmocklisp_arguments, Qt) ? XINT (tem) : !NILP (tem))) | |
db9f0278 JB |
825 | { |
826 | QUIT; | |
827 | Fprogn (body); | |
828 | } | |
829 | ||
830 | UNGCPRO; | |
831 | return Qnil; | |
832 | } | |
833 | ||
834 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
835 | "Return result of expanding macros at top level of FORM.\n\ | |
836 | If FORM is not a macro call, it is returned unchanged.\n\ | |
837 | Otherwise, the macro is expanded and the expansion is considered\n\ | |
838 | in place of FORM. When a non-macro-call results, it is returned.\n\n\ | |
839 | The second optional arg ENVIRONMENT species an environment of macro\n\ | |
840 | definitions to shadow the loaded ones for use in file byte-compilation.") | |
79e8bfbf | 841 | (form, environment) |
2e267a2e | 842 | Lisp_Object form; |
79e8bfbf | 843 | Lisp_Object environment; |
db9f0278 | 844 | { |
23d6b5a6 | 845 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
846 | register Lisp_Object expander, sym, def, tem; |
847 | ||
848 | while (1) | |
849 | { | |
850 | /* Come back here each time we expand a macro call, | |
851 | in case it expands into another macro call. */ | |
90165123 | 852 | if (!CONSP (form)) |
db9f0278 | 853 | break; |
23d6b5a6 | 854 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 855 | def = sym = XCAR (form); |
23d6b5a6 | 856 | tem = Qnil; |
db9f0278 JB |
857 | /* Trace symbols aliases to other symbols |
858 | until we get a symbol that is not an alias. */ | |
90165123 | 859 | while (SYMBOLP (def)) |
db9f0278 JB |
860 | { |
861 | QUIT; | |
23d6b5a6 | 862 | sym = def; |
79e8bfbf | 863 | tem = Fassq (sym, environment); |
265a9e55 | 864 | if (NILP (tem)) |
db9f0278 JB |
865 | { |
866 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
867 | if (!EQ (def, Qunbound)) |
868 | continue; | |
db9f0278 | 869 | } |
23d6b5a6 | 870 | break; |
db9f0278 | 871 | } |
79e8bfbf | 872 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 873 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 874 | if (NILP (tem)) |
db9f0278 | 875 | { |
79e8bfbf | 876 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 877 | Look at its function definition. */ |
90165123 | 878 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
879 | /* Not defined or definition not suitable */ |
880 | break; | |
03699b14 | 881 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
882 | { |
883 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 884 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 885 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
886 | /* Yes, load it and try again. */ |
887 | { | |
ca20916b RS |
888 | struct gcpro gcpro1; |
889 | GCPRO1 (form); | |
ee9ee63c | 890 | do_autoload (def, sym); |
ca20916b | 891 | UNGCPRO; |
ee9ee63c JB |
892 | continue; |
893 | } | |
894 | else | |
db9f0278 | 895 | break; |
db9f0278 | 896 | } |
03699b14 | 897 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 898 | break; |
03699b14 | 899 | else expander = XCDR (def); |
db9f0278 JB |
900 | } |
901 | else | |
902 | { | |
03699b14 | 903 | expander = XCDR (tem); |
265a9e55 | 904 | if (NILP (expander)) |
db9f0278 JB |
905 | break; |
906 | } | |
03699b14 | 907 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
908 | } |
909 | return form; | |
910 | } | |
911 | \f | |
912 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
913 | "(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.\n\ | |
4e306308 RS |
914 | TAG is evalled to get the tag to use; it must not be nil.\n\ |
915 | \n\ | |
916 | Then the BODY is executed.\n\ | |
db9f0278 JB |
917 | Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.\n\ |
918 | If no throw happens, `catch' returns the value of the last BODY form.\n\ | |
919 | If a throw happens, it specifies the value to return from `catch'.") | |
920 | (args) | |
921 | Lisp_Object args; | |
922 | { | |
923 | register Lisp_Object tag; | |
924 | struct gcpro gcpro1; | |
925 | ||
926 | GCPRO1 (args); | |
927 | tag = Feval (Fcar (args)); | |
928 | UNGCPRO; | |
929 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
930 | } | |
931 | ||
932 | /* Set up a catch, then call C function FUNC on argument ARG. | |
933 | FUNC should return a Lisp_Object. | |
934 | This is how catches are done from within C code. */ | |
935 | ||
936 | Lisp_Object | |
937 | internal_catch (tag, func, arg) | |
938 | Lisp_Object tag; | |
939 | Lisp_Object (*func) (); | |
940 | Lisp_Object arg; | |
941 | { | |
942 | /* This structure is made part of the chain `catchlist'. */ | |
943 | struct catchtag c; | |
944 | ||
945 | /* Fill in the components of c, and put it on the list. */ | |
946 | c.next = catchlist; | |
947 | c.tag = tag; | |
948 | c.val = Qnil; | |
949 | c.backlist = backtrace_list; | |
950 | c.handlerlist = handlerlist; | |
951 | c.lisp_eval_depth = lisp_eval_depth; | |
952 | c.pdlcount = specpdl_ptr - specpdl; | |
953 | c.poll_suppress_count = poll_suppress_count; | |
954 | c.gcpro = gcprolist; | |
bcf28080 | 955 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
956 | catchlist = &c; |
957 | ||
958 | /* Call FUNC. */ | |
959 | if (! _setjmp (c.jmp)) | |
960 | c.val = (*func) (arg); | |
961 | ||
962 | /* Throw works by a longjmp that comes right here. */ | |
963 | catchlist = c.next; | |
964 | return c.val; | |
965 | } | |
966 | ||
ba410f40 JB |
967 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
968 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 969 | |
ba410f40 JB |
970 | This is the guts Fthrow and Fsignal; they differ only in the way |
971 | they choose the catch tag to throw to. A catch tag for a | |
972 | condition-case form has a TAG of Qnil. | |
db9f0278 | 973 | |
ba410f40 JB |
974 | Before each catch is discarded, unbind all special bindings and |
975 | execute all unwind-protect clauses made above that catch. Unwind | |
976 | the handler stack as we go, so that the proper handlers are in | |
977 | effect for each unwind-protect clause we run. At the end, restore | |
978 | some static info saved in CATCH, and longjmp to the location | |
979 | specified in the | |
980 | ||
981 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
982 | |
983 | static void | |
ba410f40 | 984 | unwind_to_catch (catch, value) |
db9f0278 | 985 | struct catchtag *catch; |
ba410f40 | 986 | Lisp_Object value; |
db9f0278 JB |
987 | { |
988 | register int last_time; | |
989 | ||
ba410f40 JB |
990 | /* Save the value in the tag. */ |
991 | catch->val = value; | |
992 | ||
82da7701 | 993 | /* Restore the polling-suppression count. */ |
1cdc3155 | 994 | set_poll_suppress_count (catch->poll_suppress_count); |
82da7701 | 995 | |
db9f0278 JB |
996 | do |
997 | { | |
998 | last_time = catchlist == catch; | |
82da7701 JB |
999 | |
1000 | /* Unwind the specpdl stack, and then restore the proper set of | |
1001 | handlers. */ | |
db9f0278 JB |
1002 | unbind_to (catchlist->pdlcount, Qnil); |
1003 | handlerlist = catchlist->handlerlist; | |
1004 | catchlist = catchlist->next; | |
1005 | } | |
1006 | while (! last_time); | |
1007 | ||
bcf28080 | 1008 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1009 | gcprolist = catch->gcpro; |
15934ffa RS |
1010 | #ifdef DEBUG_GCPRO |
1011 | if (gcprolist != 0) | |
1012 | gcpro_level = gcprolist->level + 1; | |
1013 | else | |
1014 | gcpro_level = 0; | |
1015 | #endif | |
db9f0278 JB |
1016 | backtrace_list = catch->backlist; |
1017 | lisp_eval_depth = catch->lisp_eval_depth; | |
ba410f40 JB |
1018 | |
1019 | _longjmp (catch->jmp, 1); | |
db9f0278 JB |
1020 | } |
1021 | ||
1022 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
1023 | "(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.\n\ | |
1024 | Both TAG and VALUE are evalled.") | |
79e8bfbf EN |
1025 | (tag, value) |
1026 | register Lisp_Object tag, value; | |
db9f0278 JB |
1027 | { |
1028 | register struct catchtag *c; | |
1029 | ||
1030 | while (1) | |
1031 | { | |
265a9e55 | 1032 | if (!NILP (tag)) |
db9f0278 JB |
1033 | for (c = catchlist; c; c = c->next) |
1034 | { | |
1035 | if (EQ (c->tag, tag)) | |
79e8bfbf | 1036 | unwind_to_catch (c, value); |
db9f0278 | 1037 | } |
79e8bfbf | 1038 | tag = Fsignal (Qno_catch, Fcons (tag, Fcons (value, Qnil))); |
db9f0278 JB |
1039 | } |
1040 | } | |
1041 | ||
1042 | ||
1043 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
1044 | "Do BODYFORM, protecting with UNWINDFORMS.\n\ | |
1045 | Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).\n\ | |
1046 | If BODYFORM completes normally, its value is returned\n\ | |
1047 | after executing the UNWINDFORMS.\n\ | |
1048 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.") | |
1049 | (args) | |
1050 | Lisp_Object args; | |
1051 | { | |
1052 | Lisp_Object val; | |
1053 | int count = specpdl_ptr - specpdl; | |
1054 | ||
1055 | record_unwind_protect (0, Fcdr (args)); | |
1056 | val = Feval (Fcar (args)); | |
1057 | return unbind_to (count, val); | |
1058 | } | |
1059 | \f | |
1060 | /* Chain of condition handlers currently in effect. | |
1061 | The elements of this chain are contained in the stack frames | |
1062 | of Fcondition_case and internal_condition_case. | |
1063 | When an error is signaled (by calling Fsignal, below), | |
1064 | this chain is searched for an element that applies. */ | |
1065 | ||
1066 | struct handler *handlerlist; | |
1067 | ||
1068 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
1069 | "Regain control when an error is signaled.\n\ | |
1070 | Usage looks like (condition-case VAR BODYFORM HANDLERS...).\n\ | |
1071 | executes BODYFORM and returns its value if no error happens.\n\ | |
1072 | Each element of HANDLERS looks like (CONDITION-NAME BODY...)\n\ | |
1073 | where the BODY is made of Lisp expressions.\n\n\ | |
1074 | A handler is applicable to an error\n\ | |
1075 | if CONDITION-NAME is one of the error's condition names.\n\ | |
1076 | If an error happens, the first applicable handler is run.\n\ | |
1077 | \n\ | |
633357d4 RS |
1078 | The car of a handler may be a list of condition names\n\ |
1079 | instead of a single condition name.\n\ | |
1080 | \n\ | |
db9f0278 JB |
1081 | When a handler handles an error,\n\ |
1082 | control returns to the condition-case and the handler BODY... is executed\n\ | |
1083 | with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).\n\ | |
1084 | VAR may be nil; then you do not get access to the signal information.\n\ | |
1085 | \n\ | |
1086 | The value of the last BODY form is returned from the condition-case.\n\ | |
1087 | See also the function `signal' for more info.") | |
1088 | (args) | |
1089 | Lisp_Object args; | |
1090 | { | |
1091 | Lisp_Object val; | |
1092 | struct catchtag c; | |
1093 | struct handler h; | |
82da7701 | 1094 | register Lisp_Object var, bodyform, handlers; |
db9f0278 | 1095 | |
82da7701 JB |
1096 | var = Fcar (args); |
1097 | bodyform = Fcar (Fcdr (args)); | |
1098 | handlers = Fcdr (Fcdr (args)); | |
1099 | CHECK_SYMBOL (var, 0); | |
1100 | ||
1101 | for (val = handlers; ! NILP (val); val = Fcdr (val)) | |
1102 | { | |
1103 | Lisp_Object tem; | |
1104 | tem = Fcar (val); | |
5f96776a RS |
1105 | if (! (NILP (tem) |
1106 | || (CONSP (tem) | |
03699b14 KR |
1107 | && (SYMBOLP (XCAR (tem)) |
1108 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1109 | error ("Invalid condition handler", tem); |
1110 | } | |
db9f0278 JB |
1111 | |
1112 | c.tag = Qnil; | |
1113 | c.val = Qnil; | |
1114 | c.backlist = backtrace_list; | |
1115 | c.handlerlist = handlerlist; | |
1116 | c.lisp_eval_depth = lisp_eval_depth; | |
1117 | c.pdlcount = specpdl_ptr - specpdl; | |
1118 | c.poll_suppress_count = poll_suppress_count; | |
1119 | c.gcpro = gcprolist; | |
bcf28080 | 1120 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1121 | if (_setjmp (c.jmp)) |
1122 | { | |
265a9e55 | 1123 | if (!NILP (h.var)) |
9d58218c RS |
1124 | specbind (h.var, c.val); |
1125 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1126 | |
1127 | /* Note that this just undoes the binding of h.var; whoever | |
1128 | longjumped to us unwound the stack to c.pdlcount before | |
1129 | throwing. */ | |
db9f0278 JB |
1130 | unbind_to (c.pdlcount, Qnil); |
1131 | return val; | |
1132 | } | |
1133 | c.next = catchlist; | |
1134 | catchlist = &c; | |
db9f0278 | 1135 | |
82da7701 JB |
1136 | h.var = var; |
1137 | h.handler = handlers; | |
db9f0278 | 1138 | h.next = handlerlist; |
db9f0278 JB |
1139 | h.tag = &c; |
1140 | handlerlist = &h; | |
1141 | ||
82da7701 | 1142 | val = Feval (bodyform); |
db9f0278 JB |
1143 | catchlist = c.next; |
1144 | handlerlist = h.next; | |
1145 | return val; | |
1146 | } | |
1147 | ||
f029ca5f RS |
1148 | /* Call the function BFUN with no arguments, catching errors within it |
1149 | according to HANDLERS. If there is an error, call HFUN with | |
1150 | one argument which is the data that describes the error: | |
1151 | (SIGNALNAME . DATA) | |
1152 | ||
1153 | HANDLERS can be a list of conditions to catch. | |
1154 | If HANDLERS is Qt, catch all errors. | |
1155 | If HANDLERS is Qerror, catch all errors | |
1156 | but allow the debugger to run if that is enabled. */ | |
1157 | ||
db9f0278 JB |
1158 | Lisp_Object |
1159 | internal_condition_case (bfun, handlers, hfun) | |
1160 | Lisp_Object (*bfun) (); | |
1161 | Lisp_Object handlers; | |
1162 | Lisp_Object (*hfun) (); | |
1163 | { | |
1164 | Lisp_Object val; | |
1165 | struct catchtag c; | |
1166 | struct handler h; | |
1167 | ||
01591d17 RS |
1168 | /* Since Fsignal resets this to 0, it had better be 0 now |
1169 | or else we have a potential bug. */ | |
1170 | if (interrupt_input_blocked != 0) | |
1171 | abort (); | |
1172 | ||
db9f0278 JB |
1173 | c.tag = Qnil; |
1174 | c.val = Qnil; | |
1175 | c.backlist = backtrace_list; | |
1176 | c.handlerlist = handlerlist; | |
1177 | c.lisp_eval_depth = lisp_eval_depth; | |
1178 | c.pdlcount = specpdl_ptr - specpdl; | |
1179 | c.poll_suppress_count = poll_suppress_count; | |
1180 | c.gcpro = gcprolist; | |
bcf28080 | 1181 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1182 | if (_setjmp (c.jmp)) |
1183 | { | |
9d58218c | 1184 | return (*hfun) (c.val); |
db9f0278 JB |
1185 | } |
1186 | c.next = catchlist; | |
1187 | catchlist = &c; | |
1188 | h.handler = handlers; | |
1189 | h.var = Qnil; | |
db9f0278 JB |
1190 | h.next = handlerlist; |
1191 | h.tag = &c; | |
1192 | handlerlist = &h; | |
1193 | ||
1194 | val = (*bfun) (); | |
1195 | catchlist = c.next; | |
1196 | handlerlist = h.next; | |
1197 | return val; | |
1198 | } | |
1199 | ||
f029ca5f RS |
1200 | /* Like internal_condition_case but call HFUN with ARG as its argument. */ |
1201 | ||
d227775c RS |
1202 | Lisp_Object |
1203 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1204 | Lisp_Object (*bfun) (); | |
1205 | Lisp_Object arg; | |
1206 | Lisp_Object handlers; | |
1207 | Lisp_Object (*hfun) (); | |
1208 | { | |
1209 | Lisp_Object val; | |
1210 | struct catchtag c; | |
1211 | struct handler h; | |
1212 | ||
1213 | c.tag = Qnil; | |
1214 | c.val = Qnil; | |
1215 | c.backlist = backtrace_list; | |
1216 | c.handlerlist = handlerlist; | |
1217 | c.lisp_eval_depth = lisp_eval_depth; | |
1218 | c.pdlcount = specpdl_ptr - specpdl; | |
1219 | c.poll_suppress_count = poll_suppress_count; | |
1220 | c.gcpro = gcprolist; | |
bcf28080 | 1221 | c.byte_stack = byte_stack_list; |
d227775c RS |
1222 | if (_setjmp (c.jmp)) |
1223 | { | |
9d58218c | 1224 | return (*hfun) (c.val); |
d227775c RS |
1225 | } |
1226 | c.next = catchlist; | |
1227 | catchlist = &c; | |
1228 | h.handler = handlers; | |
1229 | h.var = Qnil; | |
1230 | h.next = handlerlist; | |
1231 | h.tag = &c; | |
1232 | handlerlist = &h; | |
1233 | ||
1234 | val = (*bfun) (arg); | |
1235 | catchlist = c.next; | |
1236 | handlerlist = h.next; | |
1237 | return val; | |
1238 | } | |
1239 | \f | |
db9f0278 JB |
1240 | static Lisp_Object find_handler_clause (); |
1241 | ||
1242 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
4200e719 | 1243 | "Signal an error. Args are ERROR-SYMBOL and associated DATA.\n\ |
db9f0278 | 1244 | This function does not return.\n\n\ |
4200e719 | 1245 | An error symbol is a symbol with an `error-conditions' property\n\ |
db9f0278 JB |
1246 | that is a list of condition names.\n\ |
1247 | A handler for any of those names will get to handle this signal.\n\ | |
1248 | The symbol `error' should normally be one of them.\n\ | |
1249 | \n\ | |
1250 | DATA should be a list. Its elements are printed as part of the error message.\n\ | |
1251 | If the signal is handled, DATA is made available to the handler.\n\ | |
1252 | See also the function `condition-case'.") | |
4200e719 RS |
1253 | (error_symbol, data) |
1254 | Lisp_Object error_symbol, data; | |
db9f0278 | 1255 | { |
bfa8ca43 AS |
1256 | /* When memory is full, ERROR-SYMBOL is nil, |
1257 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). */ | |
db9f0278 JB |
1258 | register struct handler *allhandlers = handlerlist; |
1259 | Lisp_Object conditions; | |
1260 | extern int gc_in_progress; | |
1261 | extern int waiting_for_input; | |
1262 | Lisp_Object debugger_value; | |
c11d3d17 | 1263 | Lisp_Object string; |
1ea9dec4 | 1264 | Lisp_Object real_error_symbol; |
48f8dfa3 | 1265 | extern int display_busy_cursor_p; |
db9f0278 | 1266 | |
db9f0278 JB |
1267 | immediate_quit = 0; |
1268 | if (gc_in_progress || waiting_for_input) | |
1269 | abort (); | |
1270 | ||
1271 | TOTALLY_UNBLOCK_INPUT; | |
1272 | ||
1ea9dec4 RS |
1273 | if (NILP (error_symbol)) |
1274 | real_error_symbol = Fcar (data); | |
1275 | else | |
1276 | real_error_symbol = error_symbol; | |
1277 | ||
48f8dfa3 GM |
1278 | #ifdef HAVE_X_WINDOWS |
1279 | if (display_busy_cursor_p) | |
1280 | Fx_hide_busy_cursor (Qt); | |
1281 | #endif | |
48f8dfa3 | 1282 | |
61ede770 RS |
1283 | /* This hook is used by edebug. */ |
1284 | if (! NILP (Vsignal_hook_function)) | |
f01a9c5b | 1285 | call2 (Vsignal_hook_function, error_symbol, data); |
61ede770 | 1286 | |
1ea9dec4 | 1287 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 JB |
1288 | |
1289 | for (; handlerlist; handlerlist = handlerlist->next) | |
1290 | { | |
1291 | register Lisp_Object clause; | |
1292 | clause = find_handler_clause (handlerlist->handler, conditions, | |
4200e719 | 1293 | error_symbol, data, &debugger_value); |
db9f0278 JB |
1294 | |
1295 | #if 0 /* Most callers are not prepared to handle gc if this returns. | |
1296 | So, since this feature is not very useful, take it out. */ | |
1297 | /* If have called debugger and user wants to continue, | |
1298 | just return nil. */ | |
1299 | if (EQ (clause, Qlambda)) | |
1300 | return debugger_value; | |
1301 | #else | |
1302 | if (EQ (clause, Qlambda)) | |
82da7701 | 1303 | { |
690337b7 KH |
1304 | /* We can't return values to code which signaled an error, but we |
1305 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1306 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1307 | return Qnil; |
1308 | else | |
d3e6f8be | 1309 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1310 | } |
db9f0278 JB |
1311 | #endif |
1312 | ||
265a9e55 | 1313 | if (!NILP (clause)) |
db9f0278 | 1314 | { |
9d58218c | 1315 | Lisp_Object unwind_data; |
db9f0278 | 1316 | struct handler *h = handlerlist; |
9d58218c | 1317 | |
db9f0278 | 1318 | handlerlist = allhandlers; |
1ea9dec4 RS |
1319 | |
1320 | if (NILP (error_symbol)) | |
1321 | unwind_data = data; | |
9d58218c RS |
1322 | else |
1323 | unwind_data = Fcons (error_symbol, data); | |
1324 | h->chosen_clause = clause; | |
1325 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1326 | } |
1327 | } | |
1328 | ||
1329 | handlerlist = allhandlers; | |
1330 | /* If no handler is present now, try to run the debugger, | |
1331 | and if that fails, throw to top level. */ | |
4200e719 | 1332 | find_handler_clause (Qerror, conditions, error_symbol, data, &debugger_value); |
c11d3d17 RS |
1333 | if (catchlist != 0) |
1334 | Fthrow (Qtop_level, Qt); | |
1335 | ||
1ea9dec4 | 1336 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1337 | data = Fcons (error_symbol, data); |
1338 | ||
1339 | string = Ferror_message_string (data); | |
377127ce | 1340 | fatal ("%s", XSTRING (string)->data, 0); |
db9f0278 JB |
1341 | } |
1342 | ||
128c0f66 RM |
1343 | /* Return nonzero iff LIST is a non-nil atom or |
1344 | a list containing one of CONDITIONS. */ | |
1345 | ||
1346 | static int | |
1347 | wants_debugger (list, conditions) | |
1348 | Lisp_Object list, conditions; | |
1349 | { | |
4de86b16 | 1350 | if (NILP (list)) |
128c0f66 RM |
1351 | return 0; |
1352 | if (! CONSP (list)) | |
1353 | return 1; | |
1354 | ||
ab67260b | 1355 | while (CONSP (conditions)) |
128c0f66 | 1356 | { |
ab67260b | 1357 | Lisp_Object this, tail; |
03699b14 KR |
1358 | this = XCAR (conditions); |
1359 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1360 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1361 | return 1; |
03699b14 | 1362 | conditions = XCDR (conditions); |
128c0f66 | 1363 | } |
ab67260b | 1364 | return 0; |
128c0f66 RM |
1365 | } |
1366 | ||
fc950e09 KH |
1367 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1368 | and described by SIGNAL-DATA, should skip the debugger | |
1369 | according to debugger-ignore-errors. */ | |
1370 | ||
1371 | static int | |
1372 | skip_debugger (conditions, data) | |
1373 | Lisp_Object conditions, data; | |
1374 | { | |
1375 | Lisp_Object tail; | |
1376 | int first_string = 1; | |
1377 | Lisp_Object error_message; | |
1378 | ||
1379 | for (tail = Vdebug_ignored_errors; CONSP (tail); | |
03699b14 | 1380 | tail = XCDR (tail)) |
fc950e09 | 1381 | { |
03699b14 | 1382 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1383 | { |
1384 | if (first_string) | |
1385 | { | |
1386 | error_message = Ferror_message_string (data); | |
1387 | first_string = 0; | |
1388 | } | |
03699b14 | 1389 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1390 | return 1; |
1391 | } | |
1392 | else | |
1393 | { | |
1394 | Lisp_Object contail; | |
1395 | ||
1396 | for (contail = conditions; CONSP (contail); | |
03699b14 KR |
1397 | contail = XCDR (contail)) |
1398 | if (EQ (XCAR (tail), XCAR (contail))) | |
fc950e09 KH |
1399 | return 1; |
1400 | } | |
1401 | } | |
1402 | ||
1403 | return 0; | |
1404 | } | |
1405 | ||
128c0f66 | 1406 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1407 | There are two ways to pass SIG and DATA: |
9b942ebd | 1408 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1409 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1410 | This is for memory-full errors only. |
1ea9dec4 | 1411 | |
128c0f66 | 1412 | Store value returned from debugger into *DEBUGGER_VALUE_PTR. */ |
db9f0278 JB |
1413 | |
1414 | static Lisp_Object | |
1415 | find_handler_clause (handlers, conditions, sig, data, debugger_value_ptr) | |
1416 | Lisp_Object handlers, conditions, sig, data; | |
1417 | Lisp_Object *debugger_value_ptr; | |
1418 | { | |
1419 | register Lisp_Object h; | |
1420 | register Lisp_Object tem; | |
db9f0278 JB |
1421 | |
1422 | if (EQ (handlers, Qt)) /* t is used by handlers for all conditions, set up by C code. */ | |
1423 | return Qt; | |
61ede770 RS |
1424 | /* error is used similarly, but means print an error message |
1425 | and run the debugger if that is enabled. */ | |
1426 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1427 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1428 | there is a handler. */ | |
db9f0278 | 1429 | { |
61ede770 RS |
1430 | int count = specpdl_ptr - specpdl; |
1431 | int debugger_called = 0; | |
1ea9dec4 | 1432 | Lisp_Object sig_symbol, combined_data; |
9b942ebd RS |
1433 | /* This is set to 1 if we are handling a memory-full error, |
1434 | because these must not run the debugger. | |
1435 | (There is no room in memory to do that!) */ | |
1436 | int no_debugger = 0; | |
1ea9dec4 RS |
1437 | |
1438 | if (NILP (sig)) | |
1439 | { | |
1440 | combined_data = data; | |
1441 | sig_symbol = Fcar (data); | |
9b942ebd | 1442 | no_debugger = 1; |
1ea9dec4 RS |
1443 | } |
1444 | else | |
1445 | { | |
1446 | combined_data = Fcons (sig, data); | |
1447 | sig_symbol = sig; | |
1448 | } | |
61ede770 | 1449 | |
128c0f66 | 1450 | if (wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b RS |
1451 | { |
1452 | #ifdef __STDC__ | |
1453 | internal_with_output_to_temp_buffer ("*Backtrace*", | |
1454 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1455 | Qnil); | |
1456 | #else | |
1457 | internal_with_output_to_temp_buffer ("*Backtrace*", | |
1458 | Fbacktrace, Qnil); | |
1459 | #endif | |
1460 | } | |
9b942ebd RS |
1461 | if (! no_debugger |
1462 | && (EQ (sig_symbol, Qquit) | |
1463 | ? debug_on_quit | |
1464 | : wants_debugger (Vdebug_on_error, conditions)) | |
1ea9dec4 | 1465 | && ! skip_debugger (conditions, combined_data) |
be857679 | 1466 | && when_entered_debugger < num_nonmacro_input_events) |
db9f0278 | 1467 | { |
db9f0278 | 1468 | specbind (Qdebug_on_error, Qnil); |
fc950e09 KH |
1469 | *debugger_value_ptr |
1470 | = call_debugger (Fcons (Qerror, | |
1ea9dec4 | 1471 | Fcons (combined_data, Qnil))); |
61ede770 RS |
1472 | debugger_called = 1; |
1473 | } | |
1474 | /* If there is no handler, return saying whether we ran the debugger. */ | |
1475 | if (EQ (handlers, Qerror)) | |
1476 | { | |
1477 | if (debugger_called) | |
1478 | return unbind_to (count, Qlambda); | |
1479 | return Qt; | |
db9f0278 | 1480 | } |
db9f0278 JB |
1481 | } |
1482 | for (h = handlers; CONSP (h); h = Fcdr (h)) | |
1483 | { | |
5f96776a RS |
1484 | Lisp_Object handler, condit; |
1485 | ||
1486 | handler = Fcar (h); | |
1487 | if (!CONSP (handler)) | |
db9f0278 | 1488 | continue; |
5f96776a RS |
1489 | condit = Fcar (handler); |
1490 | /* Handle a single condition name in handler HANDLER. */ | |
1491 | if (SYMBOLP (condit)) | |
1492 | { | |
1493 | tem = Fmemq (Fcar (handler), conditions); | |
1494 | if (!NILP (tem)) | |
1495 | return handler; | |
1496 | } | |
1497 | /* Handle a list of condition names in handler HANDLER. */ | |
1498 | else if (CONSP (condit)) | |
1499 | { | |
1500 | while (CONSP (condit)) | |
1501 | { | |
1502 | tem = Fmemq (Fcar (condit), conditions); | |
1503 | if (!NILP (tem)) | |
1504 | return handler; | |
03699b14 | 1505 | condit = XCDR (condit); |
5f96776a RS |
1506 | } |
1507 | } | |
db9f0278 JB |
1508 | } |
1509 | return Qnil; | |
1510 | } | |
1511 | ||
1512 | /* dump an error message; called like printf */ | |
1513 | ||
1514 | /* VARARGS 1 */ | |
1515 | void | |
1516 | error (m, a1, a2, a3) | |
1517 | char *m; | |
9125da08 | 1518 | char *a1, *a2, *a3; |
db9f0278 JB |
1519 | { |
1520 | char buf[200]; | |
9125da08 RS |
1521 | int size = 200; |
1522 | int mlen; | |
1523 | char *buffer = buf; | |
1524 | char *args[3]; | |
1525 | int allocated = 0; | |
1526 | Lisp_Object string; | |
1527 | ||
1528 | args[0] = a1; | |
1529 | args[1] = a2; | |
1530 | args[2] = a3; | |
1531 | ||
1532 | mlen = strlen (m); | |
db9f0278 JB |
1533 | |
1534 | while (1) | |
9125da08 | 1535 | { |
955f3ff9 | 1536 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
1537 | if (used < size) |
1538 | break; | |
1539 | size *= 2; | |
1540 | if (allocated) | |
1541 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
1542 | else |
1543 | { | |
1544 | buffer = (char *) xmalloc (size); | |
1545 | allocated = 1; | |
1546 | } | |
9125da08 RS |
1547 | } |
1548 | ||
955f3ff9 | 1549 | string = build_string (buffer); |
9125da08 RS |
1550 | if (allocated) |
1551 | free (buffer); | |
1552 | ||
1553 | Fsignal (Qerror, Fcons (string, Qnil)); | |
db9f0278 JB |
1554 | } |
1555 | \f | |
1556 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 1, 0, | |
1557 | "T if FUNCTION makes provisions for interactive calling.\n\ | |
1558 | This means it contains a description for how to read arguments to give it.\n\ | |
1559 | The value is nil for an invalid function or a symbol with no function\n\ | |
1560 | definition.\n\ | |
1561 | \n\ | |
1562 | Interactively callable functions include strings and vectors (treated\n\ | |
1563 | as keyboard macros), lambda-expressions that contain a top-level call\n\ | |
1564 | to `interactive', autoload definitions made by `autoload' with non-nil\n\ | |
1565 | fourth argument, and some of the built-in functions of Lisp.\n\ | |
1566 | \n\ | |
1567 | Also, a symbol satisfies `commandp' if its function definition does so.") | |
1568 | (function) | |
1569 | Lisp_Object function; | |
1570 | { | |
1571 | register Lisp_Object fun; | |
1572 | register Lisp_Object funcar; | |
db9f0278 JB |
1573 | |
1574 | fun = function; | |
1575 | ||
ffd56f97 JB |
1576 | fun = indirect_function (fun); |
1577 | if (EQ (fun, Qunbound)) | |
1578 | return Qnil; | |
db9f0278 JB |
1579 | |
1580 | /* Emacs primitives are interactive if their DEFUN specifies an | |
1581 | interactive spec. */ | |
90165123 | 1582 | if (SUBRP (fun)) |
db9f0278 JB |
1583 | { |
1584 | if (XSUBR (fun)->prompt) | |
1585 | return Qt; | |
1586 | else | |
1587 | return Qnil; | |
1588 | } | |
1589 | ||
1590 | /* Bytecode objects are interactive if they are long enough to | |
1591 | have an element whose index is COMPILED_INTERACTIVE, which is | |
1592 | where the interactive spec is stored. */ | |
90165123 | 1593 | else if (COMPILEDP (fun)) |
f9b4aacf | 1594 | return ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
db9f0278 JB |
1595 | ? Qt : Qnil); |
1596 | ||
1597 | /* Strings and vectors are keyboard macros. */ | |
90165123 | 1598 | if (STRINGP (fun) || VECTORP (fun)) |
db9f0278 JB |
1599 | return Qt; |
1600 | ||
1601 | /* Lists may represent commands. */ | |
1602 | if (!CONSP (fun)) | |
1603 | return Qnil; | |
1604 | funcar = Fcar (fun); | |
90165123 | 1605 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
1606 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
1607 | if (EQ (funcar, Qlambda)) | |
1608 | return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
1609 | if (EQ (funcar, Qmocklisp)) | |
1610 | return Qt; /* All mocklisp functions can be called interactively */ | |
1611 | if (EQ (funcar, Qautoload)) | |
1612 | return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
1613 | else | |
1614 | return Qnil; | |
1615 | } | |
1616 | ||
1617 | /* ARGSUSED */ | |
1618 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, | |
1619 | "Define FUNCTION to autoload from FILE.\n\ | |
1620 | FUNCTION is a symbol; FILE is a file name string to pass to `load'.\n\ | |
1621 | Third arg DOCSTRING is documentation for the function.\n\ | |
1622 | Fourth arg INTERACTIVE if non-nil says function can be called interactively.\n\ | |
ee9ee63c JB |
1623 | Fifth arg TYPE indicates the type of the object:\n\ |
1624 | nil or omitted says FUNCTION is a function,\n\ | |
1625 | `keymap' says FUNCTION is really a keymap, and\n\ | |
1626 | `macro' or t says FUNCTION is really a macro.\n\ | |
db9f0278 JB |
1627 | Third through fifth args give info about the real definition.\n\ |
1628 | They default to nil.\n\ | |
1629 | If FUNCTION is already defined other than as an autoload,\n\ | |
1630 | this does nothing and returns nil.") | |
ee9ee63c JB |
1631 | (function, file, docstring, interactive, type) |
1632 | Lisp_Object function, file, docstring, interactive, type; | |
db9f0278 JB |
1633 | { |
1634 | #ifdef NO_ARG_ARRAY | |
1635 | Lisp_Object args[4]; | |
1636 | #endif | |
1637 | ||
1638 | CHECK_SYMBOL (function, 0); | |
1639 | CHECK_STRING (file, 1); | |
1640 | ||
1641 | /* If function is defined and not as an autoload, don't override */ | |
1642 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 1643 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 1644 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
1645 | return Qnil; |
1646 | ||
1647 | #ifdef NO_ARG_ARRAY | |
1648 | args[0] = file; | |
1649 | args[1] = docstring; | |
1650 | args[2] = interactive; | |
ee9ee63c | 1651 | args[3] = type; |
db9f0278 JB |
1652 | |
1653 | return Ffset (function, Fcons (Qautoload, Flist (4, &args[0]))); | |
1654 | #else /* NO_ARG_ARRAY */ | |
1655 | return Ffset (function, Fcons (Qautoload, Flist (4, &file))); | |
1656 | #endif /* not NO_ARG_ARRAY */ | |
1657 | } | |
1658 | ||
1659 | Lisp_Object | |
1660 | un_autoload (oldqueue) | |
1661 | Lisp_Object oldqueue; | |
1662 | { | |
1663 | register Lisp_Object queue, first, second; | |
1664 | ||
1665 | /* Queue to unwind is current value of Vautoload_queue. | |
1666 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
1667 | queue = Vautoload_queue; | |
1668 | Vautoload_queue = oldqueue; | |
1669 | while (CONSP (queue)) | |
1670 | { | |
1671 | first = Fcar (queue); | |
1672 | second = Fcdr (first); | |
1673 | first = Fcar (first); | |
1674 | if (EQ (second, Qnil)) | |
1675 | Vfeatures = first; | |
1676 | else | |
1677 | Ffset (first, second); | |
1678 | queue = Fcdr (queue); | |
1679 | } | |
1680 | return Qnil; | |
1681 | } | |
1682 | ||
ca20916b RS |
1683 | /* Load an autoloaded function. |
1684 | FUNNAME is the symbol which is the function's name. | |
1685 | FUNDEF is the autoload definition (a list). */ | |
1686 | ||
045ba794 | 1687 | void |
db9f0278 JB |
1688 | do_autoload (fundef, funname) |
1689 | Lisp_Object fundef, funname; | |
1690 | { | |
1691 | int count = specpdl_ptr - specpdl; | |
cb81ac97 | 1692 | Lisp_Object fun, queue, first, second; |
ca20916b | 1693 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 JB |
1694 | |
1695 | fun = funname; | |
1696 | CHECK_SYMBOL (funname, 0); | |
ca20916b | 1697 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 1698 | |
f87740dc RS |
1699 | /* Preserve the match data. */ |
1700 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
1701 | ||
1702 | /* Value saved here is to be restored into Vautoload_queue. */ | |
db9f0278 JB |
1703 | record_unwind_protect (un_autoload, Vautoload_queue); |
1704 | Vautoload_queue = Qt; | |
4aac2302 | 1705 | Fload (Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil, Qt); |
2a49b6e5 | 1706 | |
f87740dc | 1707 | /* Save the old autoloads, in case we ever do an unload. */ |
2a49b6e5 RS |
1708 | queue = Vautoload_queue; |
1709 | while (CONSP (queue)) | |
1710 | { | |
1711 | first = Fcar (queue); | |
1712 | second = Fcdr (first); | |
1713 | first = Fcar (first); | |
5739ce6b ER |
1714 | |
1715 | /* Note: This test is subtle. The cdr of an autoload-queue entry | |
1716 | may be an atom if the autoload entry was generated by a defalias | |
f87740dc | 1717 | or fset. */ |
5739ce6b | 1718 | if (CONSP (second)) |
03e267c2 | 1719 | Fput (first, Qautoload, (Fcdr (second))); |
5739ce6b | 1720 | |
2a49b6e5 RS |
1721 | queue = Fcdr (queue); |
1722 | } | |
1723 | ||
db9f0278 JB |
1724 | /* Once loading finishes, don't undo it. */ |
1725 | Vautoload_queue = Qt; | |
1726 | unbind_to (count, Qnil); | |
1727 | ||
ffd56f97 JB |
1728 | fun = Findirect_function (fun); |
1729 | ||
76c2b0cc | 1730 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 JB |
1731 | error ("Autoloading failed to define function %s", |
1732 | XSYMBOL (funname)->name->data); | |
ca20916b | 1733 | UNGCPRO; |
db9f0278 JB |
1734 | } |
1735 | \f | |
1736 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
1737 | "Evaluate FORM and return its value.") | |
1738 | (form) | |
1739 | Lisp_Object form; | |
1740 | { | |
1741 | Lisp_Object fun, val, original_fun, original_args; | |
1742 | Lisp_Object funcar; | |
1743 | struct backtrace backtrace; | |
1744 | struct gcpro gcpro1, gcpro2, gcpro3; | |
1745 | ||
48f8dfa3 GM |
1746 | /* Since Fsignal resets this to 0, it had better be 0 now |
1747 | or else we have a potential bug. */ | |
1748 | if (interrupt_input_blocked != 0) | |
1749 | abort (); | |
1750 | ||
90165123 | 1751 | if (SYMBOLP (form)) |
db9f0278 JB |
1752 | { |
1753 | if (EQ (Vmocklisp_arguments, Qt)) | |
1754 | return Fsymbol_value (form); | |
1755 | val = Fsymbol_value (form); | |
265a9e55 | 1756 | if (NILP (val)) |
a631e24c | 1757 | XSETFASTINT (val, 0); |
db9f0278 | 1758 | else if (EQ (val, Qt)) |
a631e24c | 1759 | XSETFASTINT (val, 1); |
db9f0278 JB |
1760 | return val; |
1761 | } | |
1762 | if (!CONSP (form)) | |
1763 | return form; | |
1764 | ||
1765 | QUIT; | |
1766 | if (consing_since_gc > gc_cons_threshold) | |
1767 | { | |
1768 | GCPRO1 (form); | |
1769 | Fgarbage_collect (); | |
1770 | UNGCPRO; | |
1771 | } | |
1772 | ||
1773 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
1774 | { | |
1775 | if (max_lisp_eval_depth < 100) | |
1776 | max_lisp_eval_depth = 100; | |
1777 | if (lisp_eval_depth > max_lisp_eval_depth) | |
1778 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
1779 | } | |
1780 | ||
1781 | original_fun = Fcar (form); | |
1782 | original_args = Fcdr (form); | |
1783 | ||
1784 | backtrace.next = backtrace_list; | |
1785 | backtrace_list = &backtrace; | |
1786 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
1787 | backtrace.args = &original_args; | |
1788 | backtrace.nargs = UNEVALLED; | |
1789 | backtrace.evalargs = 1; | |
1790 | backtrace.debug_on_exit = 0; | |
1791 | ||
1792 | if (debug_on_next_call) | |
1793 | do_debug_on_call (Qt); | |
1794 | ||
1795 | /* At this point, only original_fun and original_args | |
1796 | have values that will be used below */ | |
1797 | retry: | |
ffd56f97 | 1798 | fun = Findirect_function (original_fun); |
db9f0278 | 1799 | |
90165123 | 1800 | if (SUBRP (fun)) |
db9f0278 JB |
1801 | { |
1802 | Lisp_Object numargs; | |
166c822d | 1803 | Lisp_Object argvals[8]; |
db9f0278 JB |
1804 | Lisp_Object args_left; |
1805 | register int i, maxargs; | |
1806 | ||
1807 | args_left = original_args; | |
1808 | numargs = Flength (args_left); | |
1809 | ||
1810 | if (XINT (numargs) < XSUBR (fun)->min_args || | |
1811 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
1812 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
1813 | ||
1814 | if (XSUBR (fun)->max_args == UNEVALLED) | |
1815 | { | |
1816 | backtrace.evalargs = 0; | |
1817 | val = (*XSUBR (fun)->function) (args_left); | |
1818 | goto done; | |
1819 | } | |
1820 | ||
1821 | if (XSUBR (fun)->max_args == MANY) | |
1822 | { | |
1823 | /* Pass a vector of evaluated arguments */ | |
1824 | Lisp_Object *vals; | |
1825 | register int argnum = 0; | |
1826 | ||
1827 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
1828 | ||
1829 | GCPRO3 (args_left, fun, fun); | |
1830 | gcpro3.var = vals; | |
1831 | gcpro3.nvars = 0; | |
1832 | ||
265a9e55 | 1833 | while (!NILP (args_left)) |
db9f0278 JB |
1834 | { |
1835 | vals[argnum++] = Feval (Fcar (args_left)); | |
1836 | args_left = Fcdr (args_left); | |
1837 | gcpro3.nvars = argnum; | |
1838 | } | |
db9f0278 JB |
1839 | |
1840 | backtrace.args = vals; | |
1841 | backtrace.nargs = XINT (numargs); | |
1842 | ||
1843 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 1844 | UNGCPRO; |
db9f0278 JB |
1845 | goto done; |
1846 | } | |
1847 | ||
1848 | GCPRO3 (args_left, fun, fun); | |
1849 | gcpro3.var = argvals; | |
1850 | gcpro3.nvars = 0; | |
1851 | ||
1852 | maxargs = XSUBR (fun)->max_args; | |
1853 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
1854 | { | |
1855 | argvals[i] = Feval (Fcar (args_left)); | |
1856 | gcpro3.nvars = ++i; | |
1857 | } | |
1858 | ||
1859 | UNGCPRO; | |
1860 | ||
1861 | backtrace.args = argvals; | |
1862 | backtrace.nargs = XINT (numargs); | |
1863 | ||
1864 | switch (i) | |
1865 | { | |
1866 | case 0: | |
1867 | val = (*XSUBR (fun)->function) (); | |
1868 | goto done; | |
1869 | case 1: | |
1870 | val = (*XSUBR (fun)->function) (argvals[0]); | |
1871 | goto done; | |
1872 | case 2: | |
1873 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
1874 | goto done; | |
1875 | case 3: | |
1876 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
1877 | argvals[2]); | |
1878 | goto done; | |
1879 | case 4: | |
1880 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
1881 | argvals[2], argvals[3]); | |
1882 | goto done; | |
1883 | case 5: | |
1884 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1885 | argvals[3], argvals[4]); | |
1886 | goto done; | |
1887 | case 6: | |
1888 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1889 | argvals[3], argvals[4], argvals[5]); | |
1890 | goto done; | |
15c65264 RS |
1891 | case 7: |
1892 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1893 | argvals[3], argvals[4], argvals[5], | |
1894 | argvals[6]); | |
1895 | goto done; | |
db9f0278 | 1896 | |
166c822d KH |
1897 | case 8: |
1898 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
1899 | argvals[3], argvals[4], argvals[5], | |
1900 | argvals[6], argvals[7]); | |
1901 | goto done; | |
1902 | ||
db9f0278 | 1903 | default: |
08564963 JB |
1904 | /* Someone has created a subr that takes more arguments than |
1905 | is supported by this code. We need to either rewrite the | |
1906 | subr to use a different argument protocol, or add more | |
1907 | cases to this switch. */ | |
1908 | abort (); | |
db9f0278 JB |
1909 | } |
1910 | } | |
90165123 | 1911 | if (COMPILEDP (fun)) |
db9f0278 JB |
1912 | val = apply_lambda (fun, original_args, 1); |
1913 | else | |
1914 | { | |
1915 | if (!CONSP (fun)) | |
1916 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
1917 | funcar = Fcar (fun); | |
90165123 | 1918 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
1919 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
1920 | if (EQ (funcar, Qautoload)) | |
1921 | { | |
1922 | do_autoload (fun, original_fun); | |
1923 | goto retry; | |
1924 | } | |
1925 | if (EQ (funcar, Qmacro)) | |
1926 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
1927 | else if (EQ (funcar, Qlambda)) | |
1928 | val = apply_lambda (fun, original_args, 1); | |
1929 | else if (EQ (funcar, Qmocklisp)) | |
1930 | val = ml_apply (fun, original_args); | |
1931 | else | |
1932 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
1933 | } | |
1934 | done: | |
1935 | if (!EQ (Vmocklisp_arguments, Qt)) | |
1936 | { | |
265a9e55 | 1937 | if (NILP (val)) |
a631e24c | 1938 | XSETFASTINT (val, 0); |
db9f0278 | 1939 | else if (EQ (val, Qt)) |
a631e24c | 1940 | XSETFASTINT (val, 1); |
db9f0278 JB |
1941 | } |
1942 | lisp_eval_depth--; | |
1943 | if (backtrace.debug_on_exit) | |
1944 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
1945 | backtrace_list = backtrace.next; | |
1946 | return val; | |
1947 | } | |
1948 | \f | |
1949 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
1950 | "Call FUNCTION with our remaining args, using our last arg as list of args.\n\ | |
fd7fe9a1 | 1951 | Then return the value FUNCTION returns.\n\ |
db9f0278 JB |
1952 | Thus, (apply '+ 1 2 '(3 4)) returns 10.") |
1953 | (nargs, args) | |
1954 | int nargs; | |
1955 | Lisp_Object *args; | |
1956 | { | |
1957 | register int i, numargs; | |
1958 | register Lisp_Object spread_arg; | |
1959 | register Lisp_Object *funcall_args; | |
db9f0278 | 1960 | Lisp_Object fun; |
a6e3fa71 | 1961 | struct gcpro gcpro1; |
db9f0278 JB |
1962 | |
1963 | fun = args [0]; | |
1964 | funcall_args = 0; | |
1965 | spread_arg = args [nargs - 1]; | |
1966 | CHECK_LIST (spread_arg, nargs); | |
1967 | ||
1968 | numargs = XINT (Flength (spread_arg)); | |
1969 | ||
1970 | if (numargs == 0) | |
1971 | return Ffuncall (nargs - 1, args); | |
1972 | else if (numargs == 1) | |
1973 | { | |
03699b14 | 1974 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
1975 | return Ffuncall (nargs, args); |
1976 | } | |
1977 | ||
a6e3fa71 | 1978 | numargs += nargs - 2; |
db9f0278 | 1979 | |
ffd56f97 JB |
1980 | fun = indirect_function (fun); |
1981 | if (EQ (fun, Qunbound)) | |
db9f0278 | 1982 | { |
ffd56f97 JB |
1983 | /* Let funcall get the error */ |
1984 | fun = args[0]; | |
1985 | goto funcall; | |
db9f0278 JB |
1986 | } |
1987 | ||
90165123 | 1988 | if (SUBRP (fun)) |
db9f0278 JB |
1989 | { |
1990 | if (numargs < XSUBR (fun)->min_args | |
1991 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
1992 | goto funcall; /* Let funcall get the error */ | |
1993 | else if (XSUBR (fun)->max_args > numargs) | |
1994 | { | |
1995 | /* Avoid making funcall cons up a yet another new vector of arguments | |
1996 | by explicitly supplying nil's for optional values */ | |
1997 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
1998 | * sizeof (Lisp_Object)); | |
1999 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
2000 | funcall_args[++i] = Qnil; | |
a6e3fa71 JB |
2001 | GCPRO1 (*funcall_args); |
2002 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2003 | } |
2004 | } | |
2005 | funcall: | |
2006 | /* We add 1 to numargs because funcall_args includes the | |
2007 | function itself as well as its arguments. */ | |
2008 | if (!funcall_args) | |
a6e3fa71 JB |
2009 | { |
2010 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
2011 | * sizeof (Lisp_Object)); | |
2012 | GCPRO1 (*funcall_args); | |
2013 | gcpro1.nvars = 1 + numargs; | |
2014 | } | |
2015 | ||
db9f0278 JB |
2016 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
2017 | /* Spread the last arg we got. Its first element goes in | |
2018 | the slot that it used to occupy, hence this value of I. */ | |
2019 | i = nargs - 1; | |
265a9e55 | 2020 | while (!NILP (spread_arg)) |
db9f0278 | 2021 | { |
03699b14 KR |
2022 | funcall_args [i++] = XCAR (spread_arg); |
2023 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2024 | } |
a6e3fa71 JB |
2025 | |
2026 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
2027 | } |
2028 | \f | |
ff936e53 SM |
2029 | /* Run hook variables in various ways. */ |
2030 | ||
2031 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2032 | ||
2033 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 1, MANY, 0, | |
2034 | "Run each hook in HOOKS. Major mode functions use this.\n\ | |
2035 | Each argument should be a symbol, a hook variable.\n\ | |
2036 | These symbols are processed in the order specified.\n\ | |
2037 | If a hook symbol has a non-nil value, that value may be a function\n\ | |
2038 | or a list of functions to be called to run the hook.\n\ | |
2039 | If the value is a function, it is called with no arguments.\n\ | |
2040 | If it is a list, the elements are called, in order, with no arguments.\n\ | |
2041 | \n\ | |
2042 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2043 | not `make-local-variable'.") | |
2044 | (nargs, args) | |
2045 | int nargs; | |
2046 | Lisp_Object *args; | |
2047 | { | |
2048 | Lisp_Object hook[1]; | |
2049 | register int i; | |
2050 | ||
2051 | for (i = 0; i < nargs; i++) | |
2052 | { | |
2053 | hook[0] = args[i]; | |
2054 | run_hook_with_args (1, hook, to_completion); | |
2055 | } | |
2056 | ||
2057 | return Qnil; | |
2058 | } | |
2059 | ||
a0d76c27 EN |
2060 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
2061 | Srun_hook_with_args, 1, MANY, 0, | |
b0b667cb KH |
2062 | "Run HOOK with the specified arguments ARGS.\n\ |
2063 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil\n\ | |
2064 | value, that value may be a function or a list of functions to be\n\ | |
2065 | called to run the hook. If the value is a function, it is called with\n\ | |
2066 | the given arguments and its return value is returned. If it is a list\n\ | |
2067 | of functions, those functions are called, in order,\n\ | |
2068 | with the given arguments ARGS.\n\ | |
2069 | It is best not to depend on the value return by `run-hook-with-args',\n\ | |
2070 | as that may change.\n\ | |
2071 | \n\ | |
ff936e53 SM |
2072 | To make a hook variable buffer-local, use `make-local-hook',\n\ |
2073 | not `make-local-variable'.") | |
2074 | (nargs, args) | |
2075 | int nargs; | |
2076 | Lisp_Object *args; | |
2077 | { | |
2078 | return run_hook_with_args (nargs, args, to_completion); | |
2079 | } | |
2080 | ||
a0d76c27 EN |
2081 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
2082 | Srun_hook_with_args_until_success, 1, MANY, 0, | |
ff936e53 SM |
2083 | "Run HOOK with the specified arguments ARGS.\n\ |
2084 | HOOK should be a symbol, a hook variable. Its value should\n\ | |
2085 | be a list of functions. We call those functions, one by one,\n\ | |
2086 | passing arguments ARGS to each of them, until one of them\n\ | |
2087 | returns a non-nil value. Then we return that value.\n\ | |
2088 | If all the functions return nil, we return nil.\n\ | |
2089 | \n\ | |
2090 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2091 | not `make-local-variable'.") | |
b0b667cb KH |
2092 | (nargs, args) |
2093 | int nargs; | |
2094 | Lisp_Object *args; | |
2095 | { | |
ff936e53 SM |
2096 | return run_hook_with_args (nargs, args, until_success); |
2097 | } | |
2098 | ||
a0d76c27 EN |
2099 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
2100 | Srun_hook_with_args_until_failure, 1, MANY, 0, | |
ff936e53 SM |
2101 | "Run HOOK with the specified arguments ARGS.\n\ |
2102 | HOOK should be a symbol, a hook variable. Its value should\n\ | |
2103 | be a list of functions. We call those functions, one by one,\n\ | |
2104 | passing arguments ARGS to each of them, until one of them\n\ | |
2105 | returns nil. Then we return nil.\n\ | |
2106 | If all the functions return non-nil, we return non-nil.\n\ | |
2107 | \n\ | |
2108 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2109 | not `make-local-variable'.") | |
2110 | (nargs, args) | |
2111 | int nargs; | |
2112 | Lisp_Object *args; | |
2113 | { | |
2114 | return run_hook_with_args (nargs, args, until_failure); | |
2115 | } | |
2116 | ||
c933ea05 RS |
2117 | /* ARGS[0] should be a hook symbol. |
2118 | Call each of the functions in the hook value, passing each of them | |
2119 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2120 | COND specifies a condition to test after each call | |
2121 | to decide whether to stop. | |
2122 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2123 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2124 | ||
ff936e53 SM |
2125 | Lisp_Object |
2126 | run_hook_with_args (nargs, args, cond) | |
2127 | int nargs; | |
2128 | Lisp_Object *args; | |
2129 | enum run_hooks_condition cond; | |
2130 | { | |
2131 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2132 | Lisp_Object globals; |
2133 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2134 | |
f029ca5f RS |
2135 | /* If we are dying or still initializing, |
2136 | don't do anything--it would probably crash if we tried. */ | |
2137 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2138 | return Qnil; |
f029ca5f | 2139 | |
b0b667cb | 2140 | sym = args[0]; |
aa681b51 | 2141 | val = find_symbol_value (sym); |
ff936e53 SM |
2142 | ret = (cond == until_failure ? Qt : Qnil); |
2143 | ||
b0b667cb | 2144 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2145 | return ret; |
03699b14 | 2146 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2147 | { |
2148 | args[0] = val; | |
2149 | return Ffuncall (nargs, args); | |
2150 | } | |
2151 | else | |
2152 | { | |
fada05d6 KH |
2153 | globals = Qnil; |
2154 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2155 | |
ff936e53 SM |
2156 | for (; |
2157 | CONSP (val) && ((cond == to_completion) | |
2158 | || (cond == until_success ? NILP (ret) | |
2159 | : !NILP (ret))); | |
03699b14 | 2160 | val = XCDR (val)) |
b0b667cb | 2161 | { |
03699b14 | 2162 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2163 | { |
2164 | /* t indicates this hook has a local binding; | |
2165 | it means to run the global binding too. */ | |
b0b667cb | 2166 | |
ff936e53 SM |
2167 | for (globals = Fdefault_value (sym); |
2168 | CONSP (globals) && ((cond == to_completion) | |
2169 | || (cond == until_success ? NILP (ret) | |
2170 | : !NILP (ret))); | |
03699b14 | 2171 | globals = XCDR (globals)) |
b0b667cb | 2172 | { |
03699b14 | 2173 | args[0] = XCAR (globals); |
77d92e05 RS |
2174 | /* In a global value, t should not occur. If it does, we |
2175 | must ignore it to avoid an endless loop. */ | |
2176 | if (!EQ (args[0], Qt)) | |
2177 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2178 | } |
2179 | } | |
2180 | else | |
2181 | { | |
03699b14 | 2182 | args[0] = XCAR (val); |
ff936e53 | 2183 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2184 | } |
2185 | } | |
cb9d21f8 RS |
2186 | |
2187 | UNGCPRO; | |
ff936e53 | 2188 | return ret; |
b0b667cb KH |
2189 | } |
2190 | } | |
c933ea05 RS |
2191 | |
2192 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2193 | present value of that symbol. | |
2194 | Call each element of FUNLIST, | |
2195 | passing each of them the rest of ARGS. | |
2196 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2197 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2198 | ||
2199 | Lisp_Object | |
2200 | run_hook_list_with_args (funlist, nargs, args) | |
2201 | Lisp_Object funlist; | |
2202 | int nargs; | |
2203 | Lisp_Object *args; | |
2204 | { | |
2205 | Lisp_Object sym; | |
2206 | Lisp_Object val; | |
fada05d6 KH |
2207 | Lisp_Object globals; |
2208 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2209 | |
2210 | sym = args[0]; | |
fada05d6 KH |
2211 | globals = Qnil; |
2212 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2213 | |
03699b14 | 2214 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2215 | { |
03699b14 | 2216 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2217 | { |
2218 | /* t indicates this hook has a local binding; | |
2219 | it means to run the global binding too. */ | |
c933ea05 RS |
2220 | |
2221 | for (globals = Fdefault_value (sym); | |
2222 | CONSP (globals); | |
03699b14 | 2223 | globals = XCDR (globals)) |
c933ea05 | 2224 | { |
03699b14 | 2225 | args[0] = XCAR (globals); |
77d92e05 RS |
2226 | /* In a global value, t should not occur. If it does, we |
2227 | must ignore it to avoid an endless loop. */ | |
2228 | if (!EQ (args[0], Qt)) | |
2229 | Ffuncall (nargs, args); | |
c933ea05 RS |
2230 | } |
2231 | } | |
2232 | else | |
2233 | { | |
03699b14 | 2234 | args[0] = XCAR (val); |
c933ea05 RS |
2235 | Ffuncall (nargs, args); |
2236 | } | |
2237 | } | |
2238 | UNGCPRO; | |
2239 | return Qnil; | |
2240 | } | |
7d48558f RS |
2241 | |
2242 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2243 | ||
2244 | void | |
2245 | run_hook_with_args_2 (hook, arg1, arg2) | |
2246 | Lisp_Object hook, arg1, arg2; | |
2247 | { | |
2248 | Lisp_Object temp[3]; | |
2249 | temp[0] = hook; | |
2250 | temp[1] = arg1; | |
2251 | temp[2] = arg2; | |
2252 | ||
2253 | Frun_hook_with_args (3, temp); | |
2254 | } | |
ff936e53 | 2255 | \f |
db9f0278 JB |
2256 | /* Apply fn to arg */ |
2257 | Lisp_Object | |
2258 | apply1 (fn, arg) | |
2259 | Lisp_Object fn, arg; | |
2260 | { | |
a6e3fa71 JB |
2261 | struct gcpro gcpro1; |
2262 | ||
2263 | GCPRO1 (fn); | |
265a9e55 | 2264 | if (NILP (arg)) |
a6e3fa71 JB |
2265 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2266 | gcpro1.nvars = 2; | |
db9f0278 JB |
2267 | #ifdef NO_ARG_ARRAY |
2268 | { | |
2269 | Lisp_Object args[2]; | |
2270 | args[0] = fn; | |
2271 | args[1] = arg; | |
a6e3fa71 JB |
2272 | gcpro1.var = args; |
2273 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2274 | } |
2275 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2276 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2277 | #endif /* not NO_ARG_ARRAY */ |
2278 | } | |
2279 | ||
2280 | /* Call function fn on no arguments */ | |
2281 | Lisp_Object | |
2282 | call0 (fn) | |
2283 | Lisp_Object fn; | |
2284 | { | |
a6e3fa71 JB |
2285 | struct gcpro gcpro1; |
2286 | ||
2287 | GCPRO1 (fn); | |
2288 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2289 | } |
2290 | ||
15285f9f | 2291 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2292 | /* ARGSUSED */ |
2293 | Lisp_Object | |
15285f9f RS |
2294 | call1 (fn, arg1) |
2295 | Lisp_Object fn, arg1; | |
db9f0278 | 2296 | { |
a6e3fa71 | 2297 | struct gcpro gcpro1; |
db9f0278 | 2298 | #ifdef NO_ARG_ARRAY |
a6e3fa71 JB |
2299 | Lisp_Object args[2]; |
2300 | ||
db9f0278 | 2301 | args[0] = fn; |
15285f9f | 2302 | args[1] = arg1; |
a6e3fa71 JB |
2303 | GCPRO1 (args[0]); |
2304 | gcpro1.nvars = 2; | |
2305 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2306 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2307 | GCPRO1 (fn); |
2308 | gcpro1.nvars = 2; | |
2309 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2310 | #endif /* not NO_ARG_ARRAY */ |
2311 | } | |
2312 | ||
15285f9f | 2313 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2314 | /* ARGSUSED */ |
2315 | Lisp_Object | |
15285f9f RS |
2316 | call2 (fn, arg1, arg2) |
2317 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2318 | { |
a6e3fa71 | 2319 | struct gcpro gcpro1; |
db9f0278 JB |
2320 | #ifdef NO_ARG_ARRAY |
2321 | Lisp_Object args[3]; | |
2322 | args[0] = fn; | |
15285f9f RS |
2323 | args[1] = arg1; |
2324 | args[2] = arg2; | |
a6e3fa71 JB |
2325 | GCPRO1 (args[0]); |
2326 | gcpro1.nvars = 3; | |
2327 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2328 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2329 | GCPRO1 (fn); |
2330 | gcpro1.nvars = 3; | |
2331 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2332 | #endif /* not NO_ARG_ARRAY */ |
2333 | } | |
2334 | ||
15285f9f | 2335 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2336 | /* ARGSUSED */ |
2337 | Lisp_Object | |
15285f9f RS |
2338 | call3 (fn, arg1, arg2, arg3) |
2339 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2340 | { |
a6e3fa71 | 2341 | struct gcpro gcpro1; |
db9f0278 JB |
2342 | #ifdef NO_ARG_ARRAY |
2343 | Lisp_Object args[4]; | |
2344 | args[0] = fn; | |
15285f9f RS |
2345 | args[1] = arg1; |
2346 | args[2] = arg2; | |
2347 | args[3] = arg3; | |
a6e3fa71 JB |
2348 | GCPRO1 (args[0]); |
2349 | gcpro1.nvars = 4; | |
2350 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2351 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2352 | GCPRO1 (fn); |
2353 | gcpro1.nvars = 4; | |
2354 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2355 | #endif /* not NO_ARG_ARRAY */ |
2356 | } | |
2357 | ||
15285f9f | 2358 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2359 | /* ARGSUSED */ |
2360 | Lisp_Object | |
15285f9f RS |
2361 | call4 (fn, arg1, arg2, arg3, arg4) |
2362 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2363 | { |
2364 | struct gcpro gcpro1; | |
2365 | #ifdef NO_ARG_ARRAY | |
2366 | Lisp_Object args[5]; | |
2367 | args[0] = fn; | |
15285f9f RS |
2368 | args[1] = arg1; |
2369 | args[2] = arg2; | |
2370 | args[3] = arg3; | |
2371 | args[4] = arg4; | |
a5a44b91 JB |
2372 | GCPRO1 (args[0]); |
2373 | gcpro1.nvars = 5; | |
2374 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2375 | #else /* not NO_ARG_ARRAY */ | |
2376 | GCPRO1 (fn); | |
2377 | gcpro1.nvars = 5; | |
2378 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2379 | #endif /* not NO_ARG_ARRAY */ | |
2380 | } | |
2381 | ||
15285f9f RS |
2382 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2383 | /* ARGSUSED */ | |
2384 | Lisp_Object | |
2385 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2386 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2387 | { | |
2388 | struct gcpro gcpro1; | |
2389 | #ifdef NO_ARG_ARRAY | |
2390 | Lisp_Object args[6]; | |
2391 | args[0] = fn; | |
2392 | args[1] = arg1; | |
2393 | args[2] = arg2; | |
2394 | args[3] = arg3; | |
2395 | args[4] = arg4; | |
2396 | args[5] = arg5; | |
2397 | GCPRO1 (args[0]); | |
2398 | gcpro1.nvars = 6; | |
2399 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2400 | #else /* not NO_ARG_ARRAY */ | |
2401 | GCPRO1 (fn); | |
2402 | gcpro1.nvars = 6; | |
2403 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2404 | #endif /* not NO_ARG_ARRAY */ | |
2405 | } | |
2406 | ||
2407 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2408 | /* ARGSUSED */ | |
2409 | Lisp_Object | |
2410 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2411 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2412 | { | |
2413 | struct gcpro gcpro1; | |
2414 | #ifdef NO_ARG_ARRAY | |
2415 | Lisp_Object args[7]; | |
2416 | args[0] = fn; | |
2417 | args[1] = arg1; | |
2418 | args[2] = arg2; | |
2419 | args[3] = arg3; | |
2420 | args[4] = arg4; | |
2421 | args[5] = arg5; | |
2422 | args[6] = arg6; | |
2423 | GCPRO1 (args[0]); | |
2424 | gcpro1.nvars = 7; | |
2425 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2426 | #else /* not NO_ARG_ARRAY */ | |
2427 | GCPRO1 (fn); | |
2428 | gcpro1.nvars = 7; | |
2429 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2430 | #endif /* not NO_ARG_ARRAY */ | |
2431 | } | |
2432 | ||
db9f0278 JB |
2433 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
2434 | "Call first argument as a function, passing remaining arguments to it.\n\ | |
fd7fe9a1 | 2435 | Return the value that function returns.\n\ |
db9f0278 JB |
2436 | Thus, (funcall 'cons 'x 'y) returns (x . y).") |
2437 | (nargs, args) | |
2438 | int nargs; | |
2439 | Lisp_Object *args; | |
2440 | { | |
2441 | Lisp_Object fun; | |
2442 | Lisp_Object funcar; | |
2443 | int numargs = nargs - 1; | |
2444 | Lisp_Object lisp_numargs; | |
2445 | Lisp_Object val; | |
2446 | struct backtrace backtrace; | |
2447 | register Lisp_Object *internal_args; | |
2448 | register int i; | |
2449 | ||
2450 | QUIT; | |
2451 | if (consing_since_gc > gc_cons_threshold) | |
a6e3fa71 | 2452 | Fgarbage_collect (); |
db9f0278 JB |
2453 | |
2454 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2455 | { | |
2456 | if (max_lisp_eval_depth < 100) | |
2457 | max_lisp_eval_depth = 100; | |
2458 | if (lisp_eval_depth > max_lisp_eval_depth) | |
2459 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
2460 | } | |
2461 | ||
2462 | backtrace.next = backtrace_list; | |
2463 | backtrace_list = &backtrace; | |
2464 | backtrace.function = &args[0]; | |
2465 | backtrace.args = &args[1]; | |
2466 | backtrace.nargs = nargs - 1; | |
2467 | backtrace.evalargs = 0; | |
2468 | backtrace.debug_on_exit = 0; | |
2469 | ||
2470 | if (debug_on_next_call) | |
2471 | do_debug_on_call (Qlambda); | |
2472 | ||
2473 | retry: | |
2474 | ||
2475 | fun = args[0]; | |
ffd56f97 JB |
2476 | |
2477 | fun = Findirect_function (fun); | |
db9f0278 | 2478 | |
90165123 | 2479 | if (SUBRP (fun)) |
db9f0278 JB |
2480 | { |
2481 | if (numargs < XSUBR (fun)->min_args | |
2482 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2483 | { | |
a631e24c | 2484 | XSETFASTINT (lisp_numargs, numargs); |
db9f0278 JB |
2485 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (lisp_numargs, Qnil))); |
2486 | } | |
2487 | ||
2488 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2489 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2490 | ||
2491 | if (XSUBR (fun)->max_args == MANY) | |
2492 | { | |
2493 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
2494 | goto done; | |
2495 | } | |
2496 | ||
2497 | if (XSUBR (fun)->max_args > numargs) | |
2498 | { | |
2499 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
2500 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
2501 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
2502 | internal_args[i] = Qnil; | |
2503 | } | |
2504 | else | |
2505 | internal_args = args + 1; | |
2506 | switch (XSUBR (fun)->max_args) | |
2507 | { | |
2508 | case 0: | |
2509 | val = (*XSUBR (fun)->function) (); | |
2510 | goto done; | |
2511 | case 1: | |
2512 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
2513 | goto done; | |
2514 | case 2: | |
2515 | val = (*XSUBR (fun)->function) (internal_args[0], | |
2516 | internal_args[1]); | |
2517 | goto done; | |
2518 | case 3: | |
2519 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2520 | internal_args[2]); | |
2521 | goto done; | |
2522 | case 4: | |
2523 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2524 | internal_args[2], | |
2525 | internal_args[3]); | |
2526 | goto done; | |
2527 | case 5: | |
2528 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2529 | internal_args[2], internal_args[3], | |
2530 | internal_args[4]); | |
2531 | goto done; | |
2532 | case 6: | |
2533 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2534 | internal_args[2], internal_args[3], | |
2535 | internal_args[4], internal_args[5]); | |
2536 | goto done; | |
15c65264 RS |
2537 | case 7: |
2538 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2539 | internal_args[2], internal_args[3], | |
2540 | internal_args[4], internal_args[5], | |
2541 | internal_args[6]); | |
2542 | goto done; | |
db9f0278 | 2543 | |
166c822d KH |
2544 | case 8: |
2545 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2546 | internal_args[2], internal_args[3], | |
2547 | internal_args[4], internal_args[5], | |
2548 | internal_args[6], internal_args[7]); | |
2549 | goto done; | |
2550 | ||
db9f0278 | 2551 | default: |
70ee42f7 | 2552 | |
166c822d | 2553 | /* If a subr takes more than 8 arguments without using MANY |
70ee42f7 JB |
2554 | or UNEVALLED, we need to extend this function to support it. |
2555 | Until this is done, there is no way to call the function. */ | |
2556 | abort (); | |
db9f0278 JB |
2557 | } |
2558 | } | |
90165123 | 2559 | if (COMPILEDP (fun)) |
db9f0278 JB |
2560 | val = funcall_lambda (fun, numargs, args + 1); |
2561 | else | |
2562 | { | |
2563 | if (!CONSP (fun)) | |
2564 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2565 | funcar = Fcar (fun); | |
90165123 | 2566 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
2567 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
2568 | if (EQ (funcar, Qlambda)) | |
2569 | val = funcall_lambda (fun, numargs, args + 1); | |
2570 | else if (EQ (funcar, Qmocklisp)) | |
2571 | val = ml_apply (fun, Flist (numargs, args + 1)); | |
2572 | else if (EQ (funcar, Qautoload)) | |
2573 | { | |
2574 | do_autoload (fun, args[0]); | |
2575 | goto retry; | |
2576 | } | |
2577 | else | |
2578 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2579 | } | |
2580 | done: | |
2581 | lisp_eval_depth--; | |
2582 | if (backtrace.debug_on_exit) | |
2583 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2584 | backtrace_list = backtrace.next; | |
2585 | return val; | |
2586 | } | |
2587 | \f | |
2588 | Lisp_Object | |
2589 | apply_lambda (fun, args, eval_flag) | |
2590 | Lisp_Object fun, args; | |
2591 | int eval_flag; | |
2592 | { | |
2593 | Lisp_Object args_left; | |
2594 | Lisp_Object numargs; | |
2595 | register Lisp_Object *arg_vector; | |
2596 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2597 | register int i; | |
2598 | register Lisp_Object tem; | |
2599 | ||
2600 | numargs = Flength (args); | |
2601 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2602 | args_left = args; | |
2603 | ||
2604 | GCPRO3 (*arg_vector, args_left, fun); | |
2605 | gcpro1.nvars = 0; | |
2606 | ||
2607 | for (i = 0; i < XINT (numargs);) | |
2608 | { | |
2609 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
2610 | if (eval_flag) tem = Feval (tem); | |
2611 | arg_vector[i++] = tem; | |
2612 | gcpro1.nvars = i; | |
2613 | } | |
2614 | ||
2615 | UNGCPRO; | |
2616 | ||
2617 | if (eval_flag) | |
2618 | { | |
2619 | backtrace_list->args = arg_vector; | |
2620 | backtrace_list->nargs = i; | |
2621 | } | |
2622 | backtrace_list->evalargs = 0; | |
2623 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
2624 | ||
2625 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
2626 | if (backtrace_list->debug_on_exit) | |
2627 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
2628 | /* Don't do it again when we return to eval. */ | |
2629 | backtrace_list->debug_on_exit = 0; | |
2630 | return tem; | |
2631 | } | |
2632 | ||
2633 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
2634 | and return the result of evaluation. | |
2635 | FUN must be either a lambda-expression or a compiled-code object. */ | |
2636 | ||
2637 | Lisp_Object | |
2638 | funcall_lambda (fun, nargs, arg_vector) | |
2639 | Lisp_Object fun; | |
2640 | int nargs; | |
2641 | register Lisp_Object *arg_vector; | |
2642 | { | |
2643 | Lisp_Object val, tem; | |
2644 | register Lisp_Object syms_left; | |
2645 | Lisp_Object numargs; | |
2646 | register Lisp_Object next; | |
2647 | int count = specpdl_ptr - specpdl; | |
2648 | register int i; | |
2649 | int optional = 0, rest = 0; | |
2650 | ||
2651 | specbind (Qmocklisp_arguments, Qt); /* t means NOT mocklisp! */ | |
2652 | ||
a631e24c | 2653 | XSETFASTINT (numargs, nargs); |
db9f0278 | 2654 | |
90165123 | 2655 | if (CONSP (fun)) |
db9f0278 | 2656 | syms_left = Fcar (Fcdr (fun)); |
90165123 | 2657 | else if (COMPILEDP (fun)) |
db9f0278 JB |
2658 | syms_left = XVECTOR (fun)->contents[COMPILED_ARGLIST]; |
2659 | else abort (); | |
2660 | ||
2661 | i = 0; | |
265a9e55 | 2662 | for (; !NILP (syms_left); syms_left = Fcdr (syms_left)) |
db9f0278 JB |
2663 | { |
2664 | QUIT; | |
2665 | next = Fcar (syms_left); | |
90165123 | 2666 | while (!SYMBOLP (next)) |
9ffa21d4 | 2667 | next = Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
db9f0278 JB |
2668 | if (EQ (next, Qand_rest)) |
2669 | rest = 1; | |
2670 | else if (EQ (next, Qand_optional)) | |
2671 | optional = 1; | |
2672 | else if (rest) | |
2673 | { | |
9ffa21d4 | 2674 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
2675 | i = nargs; |
2676 | } | |
2677 | else if (i < nargs) | |
2678 | { | |
2679 | tem = arg_vector[i++]; | |
2680 | specbind (next, tem); | |
2681 | } | |
2682 | else if (!optional) | |
2683 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
2684 | else | |
2685 | specbind (next, Qnil); | |
2686 | } | |
2687 | ||
2688 | if (i < nargs) | |
2689 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
2690 | ||
90165123 | 2691 | if (CONSP (fun)) |
db9f0278 JB |
2692 | val = Fprogn (Fcdr (Fcdr (fun))); |
2693 | else | |
ca248607 RS |
2694 | { |
2695 | /* If we have not actually read the bytecode string | |
2696 | and constants vector yet, fetch them from the file. */ | |
2697 | if (CONSP (XVECTOR (fun)->contents[COMPILED_BYTECODE])) | |
661c7d6e | 2698 | Ffetch_bytecode (fun); |
ca248607 RS |
2699 | val = Fbyte_code (XVECTOR (fun)->contents[COMPILED_BYTECODE], |
2700 | XVECTOR (fun)->contents[COMPILED_CONSTANTS], | |
2701 | XVECTOR (fun)->contents[COMPILED_STACK_DEPTH]); | |
2702 | } | |
db9f0278 JB |
2703 | return unbind_to (count, val); |
2704 | } | |
661c7d6e KH |
2705 | |
2706 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
2707 | 1, 1, 0, | |
2708 | "If byte-compiled OBJECT is lazy-loaded, fetch it now.") | |
2709 | (object) | |
2710 | Lisp_Object object; | |
2711 | { | |
2712 | Lisp_Object tem; | |
2713 | ||
2714 | if (COMPILEDP (object) | |
2715 | && CONSP (XVECTOR (object)->contents[COMPILED_BYTECODE])) | |
2716 | { | |
2717 | tem = read_doc_string (XVECTOR (object)->contents[COMPILED_BYTECODE]); | |
5bbdb090 RS |
2718 | if (!CONSP (tem)) |
2719 | error ("invalid byte code"); | |
03699b14 KR |
2720 | XVECTOR (object)->contents[COMPILED_BYTECODE] = XCAR (tem); |
2721 | XVECTOR (object)->contents[COMPILED_CONSTANTS] = XCDR (tem); | |
661c7d6e KH |
2722 | } |
2723 | return object; | |
2724 | } | |
db9f0278 JB |
2725 | \f |
2726 | void | |
2727 | grow_specpdl () | |
2728 | { | |
2729 | register int count = specpdl_ptr - specpdl; | |
2730 | if (specpdl_size >= max_specpdl_size) | |
2731 | { | |
2732 | if (max_specpdl_size < 400) | |
2733 | max_specpdl_size = 400; | |
2734 | if (specpdl_size >= max_specpdl_size) | |
2735 | { | |
debee8fe RS |
2736 | if (!NILP (Vdebug_on_error)) |
2737 | /* Leave room for some specpdl in the debugger. */ | |
2738 | max_specpdl_size = specpdl_size + 100; | |
db9f0278 JB |
2739 | Fsignal (Qerror, |
2740 | Fcons (build_string ("Variable binding depth exceeds max-specpdl-size"), Qnil)); | |
db9f0278 JB |
2741 | } |
2742 | } | |
2743 | specpdl_size *= 2; | |
2744 | if (specpdl_size > max_specpdl_size) | |
2745 | specpdl_size = max_specpdl_size; | |
2746 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
2747 | specpdl_ptr = specpdl + count; | |
2748 | } | |
2749 | ||
2750 | void | |
2751 | specbind (symbol, value) | |
2752 | Lisp_Object symbol, value; | |
2753 | { | |
db9f0278 JB |
2754 | Lisp_Object ovalue; |
2755 | ||
9ffa21d4 JB |
2756 | CHECK_SYMBOL (symbol, 0); |
2757 | ||
719177b3 RS |
2758 | ovalue = find_symbol_value (symbol); |
2759 | ||
db9f0278 JB |
2760 | if (specpdl_ptr == specpdl + specpdl_size) |
2761 | grow_specpdl (); | |
db9f0278 | 2762 | specpdl_ptr->func = 0; |
719177b3 RS |
2763 | specpdl_ptr->old_value = ovalue; |
2764 | ||
2765 | if (BUFFER_LOCAL_VALUEP (XSYMBOL (symbol)->value) | |
2766 | || SOME_BUFFER_LOCAL_VALUEP (XSYMBOL (symbol)->value) | |
2767 | || BUFFER_OBJFWDP (XSYMBOL (symbol)->value)) | |
2768 | { | |
2769 | Lisp_Object buffer; | |
2770 | /* For a local variable, record both the symbol and which | |
2771 | buffer's value we are saving. */ | |
2772 | buffer = Fcurrent_buffer (); | |
2773 | /* If the variable is not local in this buffer, | |
2774 | we are saving the global value, so restore that. */ | |
2775 | if (NILP (Flocal_variable_p (symbol, buffer))) | |
2776 | buffer = Qnil; | |
2777 | specpdl_ptr->symbol = Fcons (symbol, buffer); | |
2778 | } | |
2779 | else | |
2780 | specpdl_ptr->symbol = symbol; | |
2781 | ||
db9f0278 | 2782 | specpdl_ptr++; |
3d8585a1 | 2783 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) |
db9f0278 JB |
2784 | store_symval_forwarding (symbol, ovalue, value); |
2785 | else | |
719177b3 | 2786 | set_internal (symbol, value, 0, 1); |
db9f0278 JB |
2787 | } |
2788 | ||
2789 | void | |
2790 | record_unwind_protect (function, arg) | |
1d159538 | 2791 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
2792 | Lisp_Object arg; |
2793 | { | |
2794 | if (specpdl_ptr == specpdl + specpdl_size) | |
2795 | grow_specpdl (); | |
2796 | specpdl_ptr->func = function; | |
2797 | specpdl_ptr->symbol = Qnil; | |
2798 | specpdl_ptr->old_value = arg; | |
2799 | specpdl_ptr++; | |
2800 | } | |
2801 | ||
2802 | Lisp_Object | |
2803 | unbind_to (count, value) | |
2804 | int count; | |
2805 | Lisp_Object value; | |
2806 | { | |
265a9e55 | 2807 | int quitf = !NILP (Vquit_flag); |
db9f0278 JB |
2808 | struct gcpro gcpro1; |
2809 | ||
2810 | GCPRO1 (value); | |
2811 | ||
2812 | Vquit_flag = Qnil; | |
2813 | ||
2814 | while (specpdl_ptr != specpdl + count) | |
2815 | { | |
2816 | --specpdl_ptr; | |
2817 | if (specpdl_ptr->func != 0) | |
2818 | (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
2819 | /* Note that a "binding" of nil is really an unwind protect, | |
719177b3 | 2820 | so in that case the "old value" is a list of forms to evaluate. */ |
265a9e55 | 2821 | else if (NILP (specpdl_ptr->symbol)) |
db9f0278 | 2822 | Fprogn (specpdl_ptr->old_value); |
719177b3 RS |
2823 | else if (CONSP (specpdl_ptr->symbol)) |
2824 | { | |
2825 | Lisp_Object symbol, buffer; | |
2826 | ||
2827 | symbol = XCAR (specpdl_ptr->symbol); | |
2828 | buffer = XCDR (specpdl_ptr->symbol); | |
2829 | ||
2830 | /* Handle restoring a default value. */ | |
2831 | if (NILP (buffer)) | |
2832 | Fset_default (symbol, specpdl_ptr->old_value); | |
2833 | /* Handle restoring a value saved from a live buffer. */ | |
2834 | else | |
2835 | set_internal (symbol, specpdl_ptr->old_value, XBUFFER (buffer), 1); | |
2836 | } | |
db9f0278 | 2837 | else |
719177b3 | 2838 | set_internal (specpdl_ptr->symbol, specpdl_ptr->old_value, 0, 1); |
db9f0278 | 2839 | } |
265a9e55 | 2840 | if (NILP (Vquit_flag) && quitf) Vquit_flag = Qt; |
db9f0278 JB |
2841 | |
2842 | UNGCPRO; | |
2843 | ||
2844 | return value; | |
2845 | } | |
2846 | \f | |
2847 | #if 0 | |
2848 | ||
2849 | /* Get the value of symbol's global binding, even if that binding | |
2850 | is not now dynamically visible. */ | |
2851 | ||
2852 | Lisp_Object | |
2853 | top_level_value (symbol) | |
2854 | Lisp_Object symbol; | |
2855 | { | |
2856 | register struct specbinding *ptr = specpdl; | |
2857 | ||
2858 | CHECK_SYMBOL (symbol, 0); | |
2859 | for (; ptr != specpdl_ptr; ptr++) | |
2860 | { | |
2861 | if (EQ (ptr->symbol, symbol)) | |
2862 | return ptr->old_value; | |
2863 | } | |
2864 | return Fsymbol_value (symbol); | |
2865 | } | |
2866 | ||
2867 | Lisp_Object | |
2868 | top_level_set (symbol, newval) | |
2869 | Lisp_Object symbol, newval; | |
2870 | { | |
2871 | register struct specbinding *ptr = specpdl; | |
2872 | ||
2873 | CHECK_SYMBOL (symbol, 0); | |
2874 | for (; ptr != specpdl_ptr; ptr++) | |
2875 | { | |
2876 | if (EQ (ptr->symbol, symbol)) | |
2877 | { | |
2878 | ptr->old_value = newval; | |
2879 | return newval; | |
2880 | } | |
2881 | } | |
2882 | return Fset (symbol, newval); | |
2883 | } | |
2884 | ||
2885 | #endif /* 0 */ | |
2886 | \f | |
2887 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, | |
2888 | "Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.\n\ | |
2889 | The debugger is entered when that frame exits, if the flag is non-nil.") | |
2890 | (level, flag) | |
2891 | Lisp_Object level, flag; | |
2892 | { | |
2893 | register struct backtrace *backlist = backtrace_list; | |
2894 | register int i; | |
2895 | ||
2896 | CHECK_NUMBER (level, 0); | |
2897 | ||
2898 | for (i = 0; backlist && i < XINT (level); i++) | |
2899 | { | |
2900 | backlist = backlist->next; | |
2901 | } | |
2902 | ||
2903 | if (backlist) | |
265a9e55 | 2904 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
2905 | |
2906 | return flag; | |
2907 | } | |
2908 | ||
2909 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
2910 | "Print a trace of Lisp function calls currently active.\n\ | |
2911 | Output stream used is value of `standard-output'.") | |
2912 | () | |
2913 | { | |
2914 | register struct backtrace *backlist = backtrace_list; | |
2915 | register int i; | |
2916 | Lisp_Object tail; | |
2917 | Lisp_Object tem; | |
2918 | extern Lisp_Object Vprint_level; | |
2919 | struct gcpro gcpro1; | |
2920 | ||
a631e24c | 2921 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
2922 | |
2923 | tail = Qnil; | |
2924 | GCPRO1 (tail); | |
2925 | ||
2926 | while (backlist) | |
2927 | { | |
2928 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
2929 | if (backlist->nargs == UNEVALLED) | |
2930 | { | |
2931 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 2932 | write_string ("\n", -1); |
db9f0278 JB |
2933 | } |
2934 | else | |
2935 | { | |
2936 | tem = *backlist->function; | |
2937 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
2938 | write_string ("(", -1); | |
2939 | if (backlist->nargs == MANY) | |
2940 | { | |
2941 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 2942 | !NILP (tail); |
db9f0278 JB |
2943 | tail = Fcdr (tail), i++) |
2944 | { | |
2945 | if (i) write_string (" ", -1); | |
2946 | Fprin1 (Fcar (tail), Qnil); | |
2947 | } | |
2948 | } | |
2949 | else | |
2950 | { | |
2951 | for (i = 0; i < backlist->nargs; i++) | |
2952 | { | |
2953 | if (i) write_string (" ", -1); | |
2954 | Fprin1 (backlist->args[i], Qnil); | |
2955 | } | |
2956 | } | |
b6703b02 | 2957 | write_string (")\n", -1); |
db9f0278 | 2958 | } |
db9f0278 JB |
2959 | backlist = backlist->next; |
2960 | } | |
2961 | ||
2962 | Vprint_level = Qnil; | |
2963 | UNGCPRO; | |
2964 | return Qnil; | |
2965 | } | |
2966 | ||
2967 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, "", | |
79e8bfbf | 2968 | "Return the function and arguments NFRAMES up from current execution point.\n\ |
db9f0278 JB |
2969 | If that frame has not evaluated the arguments yet (or is a special form),\n\ |
2970 | the value is (nil FUNCTION ARG-FORMS...).\n\ | |
2971 | If that frame has evaluated its arguments and called its function already,\n\ | |
2972 | the value is (t FUNCTION ARG-VALUES...).\n\ | |
2973 | A &rest arg is represented as the tail of the list ARG-VALUES.\n\ | |
2974 | FUNCTION is whatever was supplied as car of evaluated list,\n\ | |
2975 | or a lambda expression for macro calls.\n\ | |
79e8bfbf | 2976 | If NFRAMES is more than the number of frames, the value is nil.") |
db9f0278 JB |
2977 | (nframes) |
2978 | Lisp_Object nframes; | |
2979 | { | |
2980 | register struct backtrace *backlist = backtrace_list; | |
2981 | register int i; | |
2982 | Lisp_Object tem; | |
2983 | ||
2984 | CHECK_NATNUM (nframes, 0); | |
2985 | ||
2986 | /* Find the frame requested. */ | |
b6703b02 | 2987 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
2988 | backlist = backlist->next; |
2989 | ||
2990 | if (!backlist) | |
2991 | return Qnil; | |
2992 | if (backlist->nargs == UNEVALLED) | |
2993 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
2994 | else | |
2995 | { | |
2996 | if (backlist->nargs == MANY) | |
2997 | tem = *backlist->args; | |
2998 | else | |
2999 | tem = Flist (backlist->nargs, backlist->args); | |
3000 | ||
3001 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3002 | } | |
3003 | } | |
3004 | \f | |
dfcf069d | 3005 | void |
db9f0278 JB |
3006 | syms_of_eval () |
3007 | { | |
3008 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
7eaada67 RS |
3009 | "*Limit on number of Lisp variable bindings & unwind-protects.\n\ |
3010 | If Lisp code tries to make more than this many at once,\n\ | |
3011 | an error is signaled."); | |
db9f0278 JB |
3012 | |
3013 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
7eaada67 | 3014 | "*Limit on depth in `eval', `apply' and `funcall' before error.\n\ |
db9f0278 JB |
3015 | This limit is to catch infinite recursions for you before they cause\n\ |
3016 | actual stack overflow in C, which would be fatal for Emacs.\n\ | |
3017 | You can safely make it considerably larger than its default value,\n\ | |
3018 | if that proves inconveniently small."); | |
3019 | ||
3020 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
3021 | "Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.\n\ | |
d0b68896 | 3022 | Typing C-g sets `quit-flag' non-nil, regardless of `inhibit-quit'."); |
db9f0278 JB |
3023 | Vquit_flag = Qnil; |
3024 | ||
3025 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
3026 | "Non-nil inhibits C-g quitting from happening immediately.\n\ | |
3027 | Note that `quit-flag' will still be set by typing C-g,\n\ | |
690337b7 | 3028 | so a quit will be signaled as soon as `inhibit-quit' is nil.\n\ |
db9f0278 JB |
3029 | To prevent this happening, set `quit-flag' to nil\n\ |
3030 | before making `inhibit-quit' nil."); | |
3031 | Vinhibit_quit = Qnil; | |
3032 | ||
ad236261 JB |
3033 | Qinhibit_quit = intern ("inhibit-quit"); |
3034 | staticpro (&Qinhibit_quit); | |
3035 | ||
db9f0278 JB |
3036 | Qautoload = intern ("autoload"); |
3037 | staticpro (&Qautoload); | |
3038 | ||
3039 | Qdebug_on_error = intern ("debug-on-error"); | |
3040 | staticpro (&Qdebug_on_error); | |
3041 | ||
3042 | Qmacro = intern ("macro"); | |
3043 | staticpro (&Qmacro); | |
3044 | ||
3045 | /* Note that the process handling also uses Qexit, but we don't want | |
3046 | to staticpro it twice, so we just do it here. */ | |
3047 | Qexit = intern ("exit"); | |
3048 | staticpro (&Qexit); | |
3049 | ||
3050 | Qinteractive = intern ("interactive"); | |
3051 | staticpro (&Qinteractive); | |
3052 | ||
3053 | Qcommandp = intern ("commandp"); | |
3054 | staticpro (&Qcommandp); | |
3055 | ||
3056 | Qdefun = intern ("defun"); | |
3057 | staticpro (&Qdefun); | |
3058 | ||
3059 | Qand_rest = intern ("&rest"); | |
3060 | staticpro (&Qand_rest); | |
3061 | ||
3062 | Qand_optional = intern ("&optional"); | |
3063 | staticpro (&Qand_optional); | |
3064 | ||
128c0f66 | 3065 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
db9f0278 | 3066 | "*Non-nil means automatically display a backtrace buffer\n\ |
128c0f66 RM |
3067 | after any error that is handled by the editor command loop.\n\ |
3068 | If the value is a list, an error only means to display a backtrace\n\ | |
3069 | if one of its condition symbols appears in the list."); | |
3070 | Vstack_trace_on_error = Qnil; | |
db9f0278 | 3071 | |
128c0f66 | 3072 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
db9f0278 JB |
3073 | "*Non-nil means enter debugger if an error is signaled.\n\ |
3074 | Does not apply to errors handled by `condition-case'.\n\ | |
128c0f66 RM |
3075 | If the value is a list, an error only means to enter the debugger\n\ |
3076 | if one of its condition symbols appears in the list.\n\ | |
db9f0278 | 3077 | See also variable `debug-on-quit'."); |
128c0f66 | 3078 | Vdebug_on_error = Qnil; |
db9f0278 | 3079 | |
fc950e09 KH |
3080 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
3081 | "*List of errors for which the debugger should not be called.\n\ | |
3082 | Each element may be a condition-name or a regexp that matches error messages.\n\ | |
3083 | If any element applies to a given error, that error skips the debugger\n\ | |
3084 | and just returns to top level.\n\ | |
3085 | This overrides the variable `debug-on-error'.\n\ | |
3086 | It does not apply to errors handled by `condition-case'."); | |
3087 | Vdebug_ignored_errors = Qnil; | |
3088 | ||
db9f0278 | 3089 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
d0b68896 | 3090 | "*Non-nil means enter debugger if quit is signaled (C-g, for example).\n\ |
1b7d8239 | 3091 | Does not apply if quit is handled by a `condition-case'."); |
db9f0278 JB |
3092 | debug_on_quit = 0; |
3093 | ||
3094 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
3095 | "Non-nil means enter debugger before next `eval', `apply' or `funcall'."); | |
3096 | ||
556d7314 GM |
3097 | DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue, |
3098 | "Non-nil means debugger may continue execution.\n\ | |
3099 | This is nil when the debugger is called under circumstances where it\n\ | |
3100 | might not be safe to continue."); | |
dac204bc | 3101 | debugger_may_continue = 1; |
556d7314 | 3102 | |
db9f0278 JB |
3103 | DEFVAR_LISP ("debugger", &Vdebugger, |
3104 | "Function to call to invoke debugger.\n\ | |
3105 | If due to frame exit, args are `exit' and the value being returned;\n\ | |
3106 | this function's value will be returned instead of that.\n\ | |
3107 | If due to error, args are `error' and a list of the args to `signal'.\n\ | |
3108 | If due to `apply' or `funcall' entry, one arg, `lambda'.\n\ | |
3109 | If due to `eval' entry, one arg, t."); | |
3110 | Vdebugger = Qnil; | |
3111 | ||
61ede770 RS |
3112 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
3113 | "If non-nil, this is a function for `signal' to call.\n\ | |
3114 | It receives the same arguments that `signal' was given.\n\ | |
3115 | The Edebug package uses this to regain control."); | |
3116 | Vsignal_hook_function = Qnil; | |
3117 | ||
db9f0278 JB |
3118 | Qmocklisp_arguments = intern ("mocklisp-arguments"); |
3119 | staticpro (&Qmocklisp_arguments); | |
3120 | DEFVAR_LISP ("mocklisp-arguments", &Vmocklisp_arguments, | |
3121 | "While in a mocklisp function, the list of its unevaluated args."); | |
3122 | Vmocklisp_arguments = Qt; | |
3123 | ||
57a6e758 | 3124 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
61ede770 RS |
3125 | "*Non-nil means call the debugger regardless of condition handlers.\n\ |
3126 | Note that `debug-on-error', `debug-on-quit' and friends\n\ | |
3127 | still determine whether to handle the particular condition."); | |
57a6e758 | 3128 | Vdebug_on_signal = Qnil; |
61ede770 | 3129 | |
6e6e9f08 RS |
3130 | Vrun_hooks = intern ("run-hooks"); |
3131 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3132 | |
3133 | staticpro (&Vautoload_queue); | |
3134 | Vautoload_queue = Qnil; | |
3135 | ||
3136 | defsubr (&Sor); | |
3137 | defsubr (&Sand); | |
3138 | defsubr (&Sif); | |
3139 | defsubr (&Scond); | |
3140 | defsubr (&Sprogn); | |
3141 | defsubr (&Sprog1); | |
3142 | defsubr (&Sprog2); | |
3143 | defsubr (&Ssetq); | |
3144 | defsubr (&Squote); | |
3145 | defsubr (&Sfunction); | |
3146 | defsubr (&Sdefun); | |
3147 | defsubr (&Sdefmacro); | |
3148 | defsubr (&Sdefvar); | |
3149 | defsubr (&Sdefconst); | |
3150 | defsubr (&Suser_variable_p); | |
3151 | defsubr (&Slet); | |
3152 | defsubr (&SletX); | |
3153 | defsubr (&Swhile); | |
3154 | defsubr (&Smacroexpand); | |
3155 | defsubr (&Scatch); | |
3156 | defsubr (&Sthrow); | |
3157 | defsubr (&Sunwind_protect); | |
3158 | defsubr (&Scondition_case); | |
3159 | defsubr (&Ssignal); | |
3160 | defsubr (&Sinteractive_p); | |
3161 | defsubr (&Scommandp); | |
3162 | defsubr (&Sautoload); | |
3163 | defsubr (&Seval); | |
3164 | defsubr (&Sapply); | |
3165 | defsubr (&Sfuncall); | |
ff936e53 SM |
3166 | defsubr (&Srun_hooks); |
3167 | defsubr (&Srun_hook_with_args); | |
3168 | defsubr (&Srun_hook_with_args_until_success); | |
3169 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3170 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3171 | defsubr (&Sbacktrace_debug); |
3172 | defsubr (&Sbacktrace); | |
3173 | defsubr (&Sbacktrace_frame); | |
3174 | } |