Commit | Line | Data |
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db9f0278 | 1 | /* Evaluator for GNU Emacs Lisp interpreter. |
e0f331ab | 2 | Copyright (C) 1985, 86, 87, 93, 94, 95, 99, 2000, 2001 |
1182a7cb | 3 | Free Software Foundation, Inc. |
db9f0278 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
96277b2d | 9 | the Free Software Foundation; either version 2, or (at your option) |
db9f0278 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
db9f0278 JB |
21 | |
22 | ||
18160b98 | 23 | #include <config.h> |
db9f0278 | 24 | #include "lisp.h" |
9ac0d9e0 | 25 | #include "blockinput.h" |
db9f0278 | 26 | #include "commands.h" |
1f98fa48 | 27 | #include "keyboard.h" |
3648c842 | 28 | #include "dispextern.h" |
db9f0278 JB |
29 | #include <setjmp.h> |
30 | ||
31 | /* This definition is duplicated in alloc.c and keyboard.c */ | |
32 | /* Putting it in lisp.h makes cc bomb out! */ | |
33 | ||
34 | struct backtrace | |
4c576a83 GM |
35 | { |
36 | struct backtrace *next; | |
37 | Lisp_Object *function; | |
38 | Lisp_Object *args; /* Points to vector of args. */ | |
39 | int nargs; /* Length of vector. | |
daa37602 JB |
40 | If nargs is UNEVALLED, args points to slot holding |
41 | list of unevalled args */ | |
4c576a83 GM |
42 | char evalargs; |
43 | /* Nonzero means call value of debugger when done with this operation. */ | |
44 | char debug_on_exit; | |
45 | }; | |
db9f0278 JB |
46 | |
47 | struct backtrace *backtrace_list; | |
48 | ||
82da7701 JB |
49 | /* This structure helps implement the `catch' and `throw' control |
50 | structure. A struct catchtag contains all the information needed | |
51 | to restore the state of the interpreter after a non-local jump. | |
52 | ||
53 | Handlers for error conditions (represented by `struct handler' | |
54 | structures) just point to a catch tag to do the cleanup required | |
55 | for their jumps. | |
56 | ||
57 | catchtag structures are chained together in the C calling stack; | |
58 | the `next' member points to the next outer catchtag. | |
59 | ||
60 | A call like (throw TAG VAL) searches for a catchtag whose `tag' | |
61 | member is TAG, and then unbinds to it. The `val' member is used to | |
62 | hold VAL while the stack is unwound; `val' is returned as the value | |
63 | of the catch form. | |
64 | ||
65 | All the other members are concerned with restoring the interpreter | |
66 | state. */ | |
4c576a83 | 67 | |
db9f0278 | 68 | struct catchtag |
4c576a83 GM |
69 | { |
70 | Lisp_Object tag; | |
71 | Lisp_Object val; | |
72 | struct catchtag *next; | |
73 | struct gcpro *gcpro; | |
74 | jmp_buf jmp; | |
75 | struct backtrace *backlist; | |
76 | struct handler *handlerlist; | |
77 | int lisp_eval_depth; | |
78 | int pdlcount; | |
79 | int poll_suppress_count; | |
80 | struct byte_stack *byte_stack; | |
81 | }; | |
db9f0278 JB |
82 | |
83 | struct catchtag *catchlist; | |
84 | ||
15934ffa RS |
85 | #ifdef DEBUG_GCPRO |
86 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
87 | int gcpro_level; | |
88 | #endif | |
89 | ||
db9f0278 | 90 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
ad236261 | 91 | Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag; |
db9f0278 JB |
92 | Lisp_Object Qmocklisp_arguments, Vmocklisp_arguments, Qmocklisp; |
93 | Lisp_Object Qand_rest, Qand_optional; | |
94 | Lisp_Object Qdebug_on_error; | |
95 | ||
6e6e9f08 RS |
96 | /* This holds either the symbol `run-hooks' or nil. |
97 | It is nil at an early stage of startup, and when Emacs | |
98 | is shutting down. */ | |
4c576a83 | 99 | |
db9f0278 JB |
100 | Lisp_Object Vrun_hooks; |
101 | ||
102 | /* Non-nil means record all fset's and provide's, to be undone | |
103 | if the file being autoloaded is not fully loaded. | |
104 | They are recorded by being consed onto the front of Vautoload_queue: | |
105 | (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
106 | ||
107 | Lisp_Object Vautoload_queue; | |
108 | ||
109 | /* Current number of specbindings allocated in specpdl. */ | |
4c576a83 | 110 | |
db9f0278 JB |
111 | int specpdl_size; |
112 | ||
113 | /* Pointer to beginning of specpdl. */ | |
4c576a83 | 114 | |
db9f0278 JB |
115 | struct specbinding *specpdl; |
116 | ||
117 | /* Pointer to first unused element in specpdl. */ | |
4c576a83 | 118 | |
db9f0278 JB |
119 | struct specbinding *specpdl_ptr; |
120 | ||
121 | /* Maximum size allowed for specpdl allocation */ | |
4c576a83 | 122 | |
db9f0278 JB |
123 | int max_specpdl_size; |
124 | ||
125 | /* Depth in Lisp evaluations and function calls. */ | |
4c576a83 | 126 | |
db9f0278 JB |
127 | int lisp_eval_depth; |
128 | ||
129 | /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
4c576a83 | 130 | |
db9f0278 JB |
131 | int max_lisp_eval_depth; |
132 | ||
133 | /* Nonzero means enter debugger before next function call */ | |
4c576a83 | 134 | |
db9f0278 JB |
135 | int debug_on_next_call; |
136 | ||
556d7314 GM |
137 | /* Non-zero means debuffer may continue. This is zero when the |
138 | debugger is called during redisplay, where it might not be safe to | |
139 | continue the interrupted redisplay. */ | |
140 | ||
141 | int debugger_may_continue; | |
142 | ||
128c0f66 | 143 | /* List of conditions (non-nil atom means all) which cause a backtrace |
4de86b16 | 144 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 145 | |
128c0f66 | 146 | Lisp_Object Vstack_trace_on_error; |
db9f0278 | 147 | |
128c0f66 | 148 | /* List of conditions (non-nil atom means all) which enter the debugger |
4de86b16 | 149 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 150 | |
128c0f66 | 151 | Lisp_Object Vdebug_on_error; |
db9f0278 | 152 | |
fc950e09 KH |
153 | /* List of conditions and regexps specifying error messages which |
154 | do not enter the debugger even if Vdebug_on_errors says they should. */ | |
4c576a83 | 155 | |
fc950e09 KH |
156 | Lisp_Object Vdebug_ignored_errors; |
157 | ||
61ede770 | 158 | /* Non-nil means call the debugger even if the error will be handled. */ |
4c576a83 | 159 | |
57a6e758 | 160 | Lisp_Object Vdebug_on_signal; |
61ede770 RS |
161 | |
162 | /* Hook for edebug to use. */ | |
4c576a83 | 163 | |
61ede770 RS |
164 | Lisp_Object Vsignal_hook_function; |
165 | ||
db9f0278 | 166 | /* Nonzero means enter debugger if a quit signal |
128c0f66 | 167 | is handled by the command loop's error handler. */ |
4c576a83 | 168 | |
db9f0278 JB |
169 | int debug_on_quit; |
170 | ||
be857679 | 171 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 172 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 173 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
174 | know that the debugger itself has an error, and we should just |
175 | signal the error instead of entering an infinite loop of debugger | |
176 | invocations. */ | |
4c576a83 | 177 | |
82da7701 | 178 | int when_entered_debugger; |
db9f0278 JB |
179 | |
180 | Lisp_Object Vdebugger; | |
181 | ||
a2ff3819 GM |
182 | /* The function from which the last `signal' was called. Set in |
183 | Fsignal. */ | |
184 | ||
185 | Lisp_Object Vsignaling_function; | |
186 | ||
4c576a83 GM |
187 | /* Set to non-zero while processing X events. Checked in Feval to |
188 | make sure the Lisp interpreter isn't called from a signal handler, | |
189 | which is unsafe because the interpreter isn't reentrant. */ | |
190 | ||
191 | int handling_signal; | |
192 | ||
db9f0278 JB |
193 | void specbind (), record_unwind_protect (); |
194 | ||
420e60e6 RS |
195 | Lisp_Object run_hook_with_args (); |
196 | ||
db9f0278 JB |
197 | Lisp_Object funcall_lambda (); |
198 | extern Lisp_Object ml_apply (); /* Apply a mocklisp function to unevaluated argument list */ | |
199 | ||
dfcf069d | 200 | void |
db9f0278 JB |
201 | init_eval_once () |
202 | { | |
203 | specpdl_size = 50; | |
716acfce | 204 | specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding)); |
270e8074 | 205 | specpdl_ptr = specpdl; |
db9f0278 | 206 | max_specpdl_size = 600; |
969f5145 | 207 | max_lisp_eval_depth = 300; |
34d470ba RS |
208 | |
209 | Vrun_hooks = Qnil; | |
db9f0278 JB |
210 | } |
211 | ||
dfcf069d | 212 | void |
db9f0278 JB |
213 | init_eval () |
214 | { | |
215 | specpdl_ptr = specpdl; | |
216 | catchlist = 0; | |
217 | handlerlist = 0; | |
218 | backtrace_list = 0; | |
219 | Vquit_flag = Qnil; | |
220 | debug_on_next_call = 0; | |
221 | lisp_eval_depth = 0; | |
87e21fbd | 222 | #ifdef DEBUG_GCPRO |
15934ffa | 223 | gcpro_level = 0; |
87e21fbd | 224 | #endif |
be857679 | 225 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 226 | when_entered_debugger = -1; |
db9f0278 JB |
227 | } |
228 | ||
229 | Lisp_Object | |
230 | call_debugger (arg) | |
231 | Lisp_Object arg; | |
232 | { | |
3648c842 | 233 | int debug_while_redisplaying; |
556d7314 | 234 | int count = specpdl_ptr - specpdl; |
3648c842 GM |
235 | Lisp_Object val; |
236 | ||
db9f0278 JB |
237 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
238 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
3648c842 | 239 | |
db9f0278 JB |
240 | if (specpdl_size + 40 > max_specpdl_size) |
241 | max_specpdl_size = specpdl_size + 40; | |
3648c842 | 242 | |
237c23b0 | 243 | #ifdef HAVE_X_WINDOWS |
df6c90d8 GM |
244 | if (display_hourglass_p) |
245 | cancel_hourglass (); | |
237c23b0 GM |
246 | #endif |
247 | ||
db9f0278 | 248 | debug_on_next_call = 0; |
be857679 | 249 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
250 | |
251 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
252 | displayed if the debugger is invoked during redisplay. */ | |
253 | debug_while_redisplaying = redisplaying_p; | |
254 | redisplaying_p = 0; | |
556d7314 GM |
255 | specbind (intern ("debugger-may-continue"), |
256 | debug_while_redisplaying ? Qnil : Qt); | |
3648c842 GM |
257 | |
258 | val = apply1 (Vdebugger, arg); | |
259 | ||
260 | /* Interrupting redisplay and resuming it later is not safe under | |
261 | all circumstances. So, when the debugger returns, abort the | |
262 | interupted redisplay by going back to the top-level. */ | |
263 | if (debug_while_redisplaying) | |
264 | Ftop_level (); | |
265 | ||
556d7314 | 266 | return unbind_to (count, val); |
db9f0278 JB |
267 | } |
268 | ||
dfcf069d | 269 | void |
db9f0278 JB |
270 | do_debug_on_call (code) |
271 | Lisp_Object code; | |
272 | { | |
273 | debug_on_next_call = 0; | |
274 | backtrace_list->debug_on_exit = 1; | |
275 | call_debugger (Fcons (code, Qnil)); | |
276 | } | |
277 | \f | |
278 | /* NOTE!!! Every function that can call EVAL must protect its args | |
279 | and temporaries from garbage collection while it needs them. | |
280 | The definition of `For' shows what you have to do. */ | |
281 | ||
282 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
283 | "Eval args until one of them yields non-nil, then return that value.\n\ | |
284 | The remaining args are not evalled at all.\n\ | |
285 | If all args return nil, return nil.") | |
286 | (args) | |
287 | Lisp_Object args; | |
288 | { | |
289 | register Lisp_Object val; | |
290 | Lisp_Object args_left; | |
291 | struct gcpro gcpro1; | |
292 | ||
265a9e55 | 293 | if (NILP(args)) |
db9f0278 JB |
294 | return Qnil; |
295 | ||
296 | args_left = args; | |
297 | GCPRO1 (args_left); | |
298 | ||
299 | do | |
300 | { | |
301 | val = Feval (Fcar (args_left)); | |
265a9e55 | 302 | if (!NILP (val)) |
db9f0278 JB |
303 | break; |
304 | args_left = Fcdr (args_left); | |
305 | } | |
265a9e55 | 306 | while (!NILP(args_left)); |
db9f0278 JB |
307 | |
308 | UNGCPRO; | |
309 | return val; | |
310 | } | |
311 | ||
312 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
313 | "Eval args until one of them yields nil, then return nil.\n\ | |
314 | The remaining args are not evalled at all.\n\ | |
315 | If no arg yields nil, return the last arg's value.") | |
316 | (args) | |
317 | Lisp_Object args; | |
318 | { | |
319 | register Lisp_Object val; | |
320 | Lisp_Object args_left; | |
321 | struct gcpro gcpro1; | |
322 | ||
265a9e55 | 323 | if (NILP(args)) |
db9f0278 JB |
324 | return Qt; |
325 | ||
326 | args_left = args; | |
327 | GCPRO1 (args_left); | |
328 | ||
329 | do | |
330 | { | |
331 | val = Feval (Fcar (args_left)); | |
265a9e55 | 332 | if (NILP (val)) |
db9f0278 JB |
333 | break; |
334 | args_left = Fcdr (args_left); | |
335 | } | |
265a9e55 | 336 | while (!NILP(args_left)); |
db9f0278 JB |
337 | |
338 | UNGCPRO; | |
339 | return val; | |
340 | } | |
341 | ||
342 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
1182a7cb | 343 | "If COND yields non-nil, do THEN, else do ELSE...\n\ |
db9f0278 JB |
344 | Returns the value of THEN or the value of the last of the ELSE's.\n\ |
345 | THEN must be one expression, but ELSE... can be zero or more expressions.\n\ | |
346 | If COND yields nil, and there are no ELSE's, the value is nil.") | |
347 | (args) | |
348 | Lisp_Object args; | |
349 | { | |
350 | register Lisp_Object cond; | |
351 | struct gcpro gcpro1; | |
352 | ||
353 | GCPRO1 (args); | |
354 | cond = Feval (Fcar (args)); | |
355 | UNGCPRO; | |
356 | ||
265a9e55 | 357 | if (!NILP (cond)) |
db9f0278 JB |
358 | return Feval (Fcar (Fcdr (args))); |
359 | return Fprogn (Fcdr (Fcdr (args))); | |
360 | } | |
361 | ||
362 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
1182a7cb | 363 | "Try each clause until one succeeds.\n\ |
db9f0278 JB |
364 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated\n\ |
365 | and, if the value is non-nil, this clause succeeds:\n\ | |
366 | then the expressions in BODY are evaluated and the last one's\n\ | |
367 | value is the value of the cond-form.\n\ | |
368 | If no clause succeeds, cond returns nil.\n\ | |
369 | If a clause has one element, as in (CONDITION),\n\ | |
370 | CONDITION's value if non-nil is returned from the cond-form.") | |
371 | (args) | |
372 | Lisp_Object args; | |
373 | { | |
374 | register Lisp_Object clause, val; | |
375 | struct gcpro gcpro1; | |
376 | ||
377 | val = Qnil; | |
378 | GCPRO1 (args); | |
265a9e55 | 379 | while (!NILP (args)) |
db9f0278 JB |
380 | { |
381 | clause = Fcar (args); | |
382 | val = Feval (Fcar (clause)); | |
265a9e55 | 383 | if (!NILP (val)) |
db9f0278 | 384 | { |
03699b14 KR |
385 | if (!EQ (XCDR (clause), Qnil)) |
386 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
387 | break; |
388 | } | |
03699b14 | 389 | args = XCDR (args); |
db9f0278 JB |
390 | } |
391 | UNGCPRO; | |
392 | ||
393 | return val; | |
394 | } | |
395 | ||
396 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
1182a7cb | 397 | "Eval BODY forms sequentially and return value of last one.") |
db9f0278 JB |
398 | (args) |
399 | Lisp_Object args; | |
400 | { | |
401 | register Lisp_Object val, tem; | |
402 | Lisp_Object args_left; | |
403 | struct gcpro gcpro1; | |
404 | ||
405 | /* In Mocklisp code, symbols at the front of the progn arglist | |
406 | are to be bound to zero. */ | |
407 | if (!EQ (Vmocklisp_arguments, Qt)) | |
408 | { | |
409 | val = make_number (0); | |
90165123 | 410 | while (!NILP (args) && (tem = Fcar (args), SYMBOLP (tem))) |
db9f0278 JB |
411 | { |
412 | QUIT; | |
413 | specbind (tem, val), args = Fcdr (args); | |
414 | } | |
415 | } | |
416 | ||
265a9e55 | 417 | if (NILP(args)) |
db9f0278 JB |
418 | return Qnil; |
419 | ||
420 | args_left = args; | |
421 | GCPRO1 (args_left); | |
422 | ||
423 | do | |
424 | { | |
425 | val = 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 ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
1182a7cb | 435 | "Eval FIRST and BODY sequentially; value from FIRST.\n\ |
db9f0278 JB |
436 | The value of FIRST 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 = 0; | |
445 | ||
265a9e55 | 446 | if (NILP(args)) |
db9f0278 JB |
447 | return Qnil; |
448 | ||
449 | args_left = args; | |
450 | val = Qnil; | |
451 | GCPRO2 (args, val); | |
452 | ||
453 | do | |
454 | { | |
455 | if (!(argnum++)) | |
456 | val = Feval (Fcar (args_left)); | |
457 | else | |
458 | Feval (Fcar (args_left)); | |
459 | args_left = Fcdr (args_left); | |
460 | } | |
265a9e55 | 461 | while (!NILP(args_left)); |
db9f0278 JB |
462 | |
463 | UNGCPRO; | |
464 | return val; | |
465 | } | |
466 | ||
467 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
1182a7cb | 468 | "Eval X, Y and BODY sequentially; value from Y.\n\ |
db9f0278 JB |
469 | The value of Y is saved during the evaluation of the remaining args,\n\ |
470 | whose values are discarded.") | |
471 | (args) | |
472 | Lisp_Object args; | |
473 | { | |
474 | Lisp_Object val; | |
475 | register Lisp_Object args_left; | |
476 | struct gcpro gcpro1, gcpro2; | |
477 | register int argnum = -1; | |
478 | ||
479 | val = Qnil; | |
480 | ||
87d238ba | 481 | if (NILP (args)) |
db9f0278 JB |
482 | return Qnil; |
483 | ||
484 | args_left = args; | |
485 | val = Qnil; | |
486 | GCPRO2 (args, val); | |
487 | ||
488 | do | |
489 | { | |
490 | if (!(argnum++)) | |
491 | val = Feval (Fcar (args_left)); | |
492 | else | |
493 | Feval (Fcar (args_left)); | |
494 | args_left = Fcdr (args_left); | |
495 | } | |
87d238ba | 496 | while (!NILP (args_left)); |
db9f0278 JB |
497 | |
498 | UNGCPRO; | |
499 | return val; | |
500 | } | |
501 | ||
502 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
1182a7cb | 503 | "Set each SYM to the value of its VAL.\n\ |
b0d75191 RS |
504 | The symbols SYM are variables; they are literal (not evaluated).\n\ |
505 | The values VAL are expressions; they are evaluated.\n\ | |
506 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.\n\ | |
507 | The second VAL is not computed until after the first SYM is set, and so on;\n\ | |
508 | each VAL can use the new value of variables set earlier in the `setq'.\n\ | |
196e7d3f | 509 | The return value of the `setq' form is the value of the last VAL.") |
db9f0278 JB |
510 | (args) |
511 | Lisp_Object args; | |
512 | { | |
513 | register Lisp_Object args_left; | |
514 | register Lisp_Object val, sym; | |
515 | struct gcpro gcpro1; | |
516 | ||
265a9e55 | 517 | if (NILP(args)) |
db9f0278 JB |
518 | return Qnil; |
519 | ||
520 | args_left = args; | |
521 | GCPRO1 (args); | |
522 | ||
523 | do | |
524 | { | |
525 | val = Feval (Fcar (Fcdr (args_left))); | |
526 | sym = Fcar (args_left); | |
527 | Fset (sym, val); | |
528 | args_left = Fcdr (Fcdr (args_left)); | |
529 | } | |
265a9e55 | 530 | while (!NILP(args_left)); |
db9f0278 JB |
531 | |
532 | UNGCPRO; | |
533 | return val; | |
534 | } | |
535 | ||
536 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, | |
537 | "Return the argument, without evaluating it. `(quote x)' yields `x'.") | |
538 | (args) | |
539 | Lisp_Object args; | |
540 | { | |
541 | return Fcar (args); | |
542 | } | |
543 | ||
544 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, | |
545 | "Like `quote', but preferred for objects which are functions.\n\ | |
546 | In byte compilation, `function' causes its argument to be compiled.\n\ | |
547 | `quote' cannot do that.") | |
548 | (args) | |
549 | Lisp_Object args; | |
550 | { | |
551 | return Fcar (args); | |
552 | } | |
553 | ||
e0f331ab | 554 | |
db9f0278 JB |
555 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, |
556 | "Return t if function in which this appears was called interactively.\n\ | |
557 | This means that the function was called with call-interactively (which\n\ | |
558 | includes being called as the binding of a key)\n\ | |
559 | and input is currently coming from the keyboard (not in keyboard macro).") | |
560 | () | |
561 | { | |
e0f331ab GM |
562 | return interactive_p (1) ? Qt : Qnil; |
563 | } | |
564 | ||
565 | ||
566 | /* Return 1 if function in which this appears was called | |
567 | interactively. This means that the function was called with | |
568 | call-interactively (which includes being called as the binding of | |
569 | a key) and input is currently coming from the keyboard (not in | |
570 | keyboard macro). | |
571 | ||
572 | EXCLUDE_SUBRS_P non-zero means always return 0 if the function | |
573 | called is a built-in. */ | |
574 | ||
575 | int | |
576 | interactive_p (exclude_subrs_p) | |
577 | int exclude_subrs_p; | |
578 | { | |
579 | struct backtrace *btp; | |
580 | Lisp_Object fun; | |
db9f0278 JB |
581 | |
582 | if (!INTERACTIVE) | |
e0f331ab | 583 | return 0; |
db9f0278 | 584 | |
db9f0278 | 585 | btp = backtrace_list; |
daa37602 JB |
586 | |
587 | /* If this isn't a byte-compiled function, there may be a frame at | |
e0f331ab | 588 | the top for Finteractive_p. If so, skip it. */ |
daa37602 | 589 | fun = Findirect_function (*btp->function); |
0598f773 | 590 | if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) |
db9f0278 | 591 | btp = btp->next; |
daa37602 JB |
592 | |
593 | /* If we're running an Emacs 18-style byte-compiled function, there | |
594 | may be a frame for Fbytecode. Now, given the strictest | |
595 | definition, this function isn't really being called | |
596 | interactively, but because that's the way Emacs 18 always builds | |
597 | byte-compiled functions, we'll accept it for now. */ | |
598 | if (EQ (*btp->function, Qbytecode)) | |
599 | btp = btp->next; | |
600 | ||
601 | /* If this isn't a byte-compiled function, then we may now be | |
602 | looking at several frames for special forms. Skip past them. */ | |
603 | while (btp && | |
604 | btp->nargs == UNEVALLED) | |
a6e3fa71 JB |
605 | btp = btp->next; |
606 | ||
daa37602 JB |
607 | /* btp now points at the frame of the innermost function that isn't |
608 | a special form, ignoring frames for Finteractive_p and/or | |
609 | Fbytecode at the top. If this frame is for a built-in function | |
610 | (such as load or eval-region) return nil. */ | |
ffd56f97 | 611 | fun = Findirect_function (*btp->function); |
e0f331ab GM |
612 | if (exclude_subrs_p && SUBRP (fun)) |
613 | return 0; | |
614 | ||
db9f0278 JB |
615 | /* btp points to the frame of a Lisp function that called interactive-p. |
616 | Return t if that function was called interactively. */ | |
617 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
e0f331ab GM |
618 | return 1; |
619 | return 0; | |
db9f0278 JB |
620 | } |
621 | ||
e0f331ab | 622 | |
db9f0278 | 623 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, |
1182a7cb | 624 | "Define NAME as a function.\n\ |
db9f0278 JB |
625 | The definition is (lambda ARGLIST [DOCSTRING] BODY...).\n\ |
626 | See also the function `interactive'.") | |
627 | (args) | |
628 | Lisp_Object args; | |
629 | { | |
630 | register Lisp_Object fn_name; | |
631 | register Lisp_Object defn; | |
632 | ||
633 | fn_name = Fcar (args); | |
634 | defn = Fcons (Qlambda, Fcdr (args)); | |
265a9e55 | 635 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
636 | defn = Fpurecopy (defn); |
637 | Ffset (fn_name, defn); | |
2a49b6e5 | 638 | LOADHIST_ATTACH (fn_name); |
db9f0278 JB |
639 | return fn_name; |
640 | } | |
641 | ||
642 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
1182a7cb | 643 | "Define NAME as a macro.\n\ |
db9f0278 JB |
644 | The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).\n\ |
645 | When the macro is called, as in (NAME ARGS...),\n\ | |
646 | the function (lambda ARGLIST BODY...) is applied to\n\ | |
647 | the list ARGS... as it appears in the expression,\n\ | |
648 | and the result should be a form to be evaluated instead of the original.") | |
649 | (args) | |
650 | Lisp_Object args; | |
651 | { | |
652 | register Lisp_Object fn_name; | |
653 | register Lisp_Object defn; | |
654 | ||
655 | fn_name = Fcar (args); | |
656 | defn = Fcons (Qmacro, Fcons (Qlambda, Fcdr (args))); | |
265a9e55 | 657 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
658 | defn = Fpurecopy (defn); |
659 | Ffset (fn_name, defn); | |
2a49b6e5 | 660 | LOADHIST_ATTACH (fn_name); |
db9f0278 JB |
661 | return fn_name; |
662 | } | |
663 | ||
664 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, | |
1182a7cb | 665 | "Define SYMBOL as a variable.\n\ |
db9f0278 JB |
666 | You are not required to define a variable in order to use it,\n\ |
667 | but the definition can supply documentation and an initial value\n\ | |
668 | in a way that tags can recognize.\n\n\ | |
669 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void.\n\ | |
06ef7355 RS |
670 | If SYMBOL is buffer-local, its default value is what is set;\n\ |
671 | buffer-local values are not affected.\n\ | |
db9f0278 JB |
672 | INITVALUE and DOCSTRING are optional.\n\ |
673 | If DOCSTRING starts with *, this variable is identified as a user option.\n\ | |
77d20262 DL |
674 | This means that M-x set-variable recognizes it.\n\ |
675 | See also `user-variable-p'.\n\ | |
db9f0278 JB |
676 | If INITVALUE is missing, SYMBOL's value is not set.") |
677 | (args) | |
678 | Lisp_Object args; | |
679 | { | |
a42ba017 | 680 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
681 | |
682 | sym = Fcar (args); | |
a42ba017 RS |
683 | tail = Fcdr (args); |
684 | if (!NILP (Fcdr (Fcdr (tail)))) | |
685 | error ("too many arguments"); | |
686 | ||
687 | if (!NILP (tail)) | |
db9f0278 JB |
688 | { |
689 | tem = Fdefault_boundp (sym); | |
265a9e55 | 690 | if (NILP (tem)) |
db9f0278 JB |
691 | Fset_default (sym, Feval (Fcar (Fcdr (args)))); |
692 | } | |
a42ba017 RS |
693 | tail = Fcdr (Fcdr (args)); |
694 | if (!NILP (Fcar (tail))) | |
db9f0278 | 695 | { |
ca248607 | 696 | tem = Fcar (tail); |
265a9e55 | 697 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
698 | tem = Fpurecopy (tem); |
699 | Fput (sym, Qvariable_documentation, tem); | |
700 | } | |
2a49b6e5 | 701 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
702 | return sym; |
703 | } | |
704 | ||
705 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
1182a7cb | 706 | "Define SYMBOL as a constant variable.\n\ |
c569512a | 707 | The intent is that neither programs nor users should ever change this value.\n\ |
db9f0278 | 708 | Always sets the value of SYMBOL to the result of evalling INITVALUE.\n\ |
06ef7355 RS |
709 | If SYMBOL is buffer-local, its default value is what is set;\n\ |
710 | buffer-local values are not affected.\n\ | |
701b1ec2 | 711 | DOCSTRING is optional.") |
db9f0278 JB |
712 | (args) |
713 | Lisp_Object args; | |
714 | { | |
715 | register Lisp_Object sym, tem; | |
716 | ||
717 | sym = Fcar (args); | |
a42ba017 RS |
718 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
719 | error ("too many arguments"); | |
720 | ||
1182a7cb DL |
721 | tem = Feval (Fcar (Fcdr (args))); |
722 | if (!NILP (Vpurify_flag)) | |
723 | tem = Fpurecopy (tem); | |
724 | Fset_default (sym, tem); | |
db9f0278 | 725 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 726 | if (!NILP (tem)) |
db9f0278 | 727 | { |
265a9e55 | 728 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
729 | tem = Fpurecopy (tem); |
730 | Fput (sym, Qvariable_documentation, tem); | |
731 | } | |
2a49b6e5 | 732 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
733 | return sym; |
734 | } | |
735 | ||
736 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, | |
737 | "Returns t if VARIABLE is intended to be set and modified by users.\n\ | |
738 | \(The alternative is a variable used internally in a Lisp program.)\n\ | |
739 | Determined by whether the first character of the documentation\n\ | |
caff32a7 DL |
740 | for the variable is `*' or if the variable is customizable (has a non-nil\n\ |
741 | value of any of `custom-type', `custom-loads' or `standard-value'\n\ | |
742 | on its property list).") | |
db9f0278 JB |
743 | (variable) |
744 | Lisp_Object variable; | |
745 | { | |
746 | Lisp_Object documentation; | |
747 | ||
5e78e475 RS |
748 | if (!SYMBOLP (variable)) |
749 | return Qnil; | |
750 | ||
db9f0278 | 751 | documentation = Fget (variable, Qvariable_documentation); |
90165123 | 752 | if (INTEGERP (documentation) && XINT (documentation) < 0) |
db9f0278 | 753 | return Qt; |
65411977 RS |
754 | if (STRINGP (documentation) |
755 | && ((unsigned char) XSTRING (documentation)->data[0] == '*')) | |
756 | return Qt; | |
757 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
758 | if (CONSP (documentation) | |
03699b14 KR |
759 | && STRINGP (XCAR (documentation)) |
760 | && INTEGERP (XCDR (documentation)) | |
761 | && XINT (XCDR (documentation)) < 0) | |
db9f0278 | 762 | return Qt; |
caff32a7 DL |
763 | /* Customizable? */ |
764 | if ((!NILP (Fget (variable, intern ("custom-type")))) | |
765 | || (!NILP (Fget (variable, intern ("custom-loads")))) | |
766 | || (!NILP (Fget (variable, intern ("standard-value"))))) | |
767 | return Qt; | |
db9f0278 JB |
768 | return Qnil; |
769 | } | |
770 | \f | |
771 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
1182a7cb | 772 | "Bind variables according to VARLIST then eval BODY.\n\ |
db9f0278 JB |
773 | The value of the last form in BODY is returned.\n\ |
774 | Each element of VARLIST is a symbol (which is bound to nil)\n\ | |
775 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\ | |
776 | Each VALUEFORM can refer to the symbols already bound by this VARLIST.") | |
777 | (args) | |
778 | Lisp_Object args; | |
779 | { | |
780 | Lisp_Object varlist, val, elt; | |
781 | int count = specpdl_ptr - specpdl; | |
782 | struct gcpro gcpro1, gcpro2, gcpro3; | |
783 | ||
784 | GCPRO3 (args, elt, varlist); | |
785 | ||
786 | varlist = Fcar (args); | |
265a9e55 | 787 | while (!NILP (varlist)) |
db9f0278 JB |
788 | { |
789 | QUIT; | |
790 | elt = Fcar (varlist); | |
90165123 | 791 | if (SYMBOLP (elt)) |
db9f0278 | 792 | specbind (elt, Qnil); |
08564963 JB |
793 | else if (! NILP (Fcdr (Fcdr (elt)))) |
794 | Fsignal (Qerror, | |
795 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
796 | elt)); | |
db9f0278 JB |
797 | else |
798 | { | |
799 | val = Feval (Fcar (Fcdr (elt))); | |
800 | specbind (Fcar (elt), val); | |
801 | } | |
802 | varlist = Fcdr (varlist); | |
803 | } | |
804 | UNGCPRO; | |
805 | val = Fprogn (Fcdr (args)); | |
806 | return unbind_to (count, val); | |
807 | } | |
808 | ||
809 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
1182a7cb | 810 | "Bind variables according to VARLIST then eval BODY.\n\ |
db9f0278 JB |
811 | The value of the last form in BODY is returned.\n\ |
812 | Each element of VARLIST is a symbol (which is bound to nil)\n\ | |
813 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\ | |
814 | All the VALUEFORMs are evalled before any symbols are bound.") | |
815 | (args) | |
816 | Lisp_Object args; | |
817 | { | |
818 | Lisp_Object *temps, tem; | |
819 | register Lisp_Object elt, varlist; | |
820 | int count = specpdl_ptr - specpdl; | |
821 | register int argnum; | |
822 | struct gcpro gcpro1, gcpro2; | |
823 | ||
824 | varlist = Fcar (args); | |
825 | ||
826 | /* Make space to hold the values to give the bound variables */ | |
827 | elt = Flength (varlist); | |
828 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
829 | ||
830 | /* Compute the values and store them in `temps' */ | |
831 | ||
832 | GCPRO2 (args, *temps); | |
833 | gcpro2.nvars = 0; | |
834 | ||
265a9e55 | 835 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
836 | { |
837 | QUIT; | |
838 | elt = Fcar (varlist); | |
90165123 | 839 | if (SYMBOLP (elt)) |
db9f0278 | 840 | temps [argnum++] = Qnil; |
08564963 JB |
841 | else if (! NILP (Fcdr (Fcdr (elt)))) |
842 | Fsignal (Qerror, | |
843 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
844 | elt)); | |
db9f0278 JB |
845 | else |
846 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
847 | gcpro2.nvars = argnum; | |
848 | } | |
849 | UNGCPRO; | |
850 | ||
851 | varlist = Fcar (args); | |
265a9e55 | 852 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
853 | { |
854 | elt = Fcar (varlist); | |
855 | tem = temps[argnum++]; | |
90165123 | 856 | if (SYMBOLP (elt)) |
db9f0278 JB |
857 | specbind (elt, tem); |
858 | else | |
859 | specbind (Fcar (elt), tem); | |
860 | } | |
861 | ||
862 | elt = Fprogn (Fcdr (args)); | |
863 | return unbind_to (count, elt); | |
864 | } | |
865 | ||
866 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
1182a7cb | 867 | "If TEST yields non-nil, eval BODY... and repeat.\n\ |
db9f0278 JB |
868 | The order of execution is thus TEST, BODY, TEST, BODY and so on\n\ |
869 | until TEST returns nil.") | |
870 | (args) | |
871 | Lisp_Object args; | |
872 | { | |
873 | Lisp_Object test, body, tem; | |
874 | struct gcpro gcpro1, gcpro2; | |
875 | ||
876 | GCPRO2 (test, body); | |
877 | ||
878 | test = Fcar (args); | |
879 | body = Fcdr (args); | |
e3c24a74 RS |
880 | while (tem = Feval (test), |
881 | (!EQ (Vmocklisp_arguments, Qt) ? XINT (tem) : !NILP (tem))) | |
db9f0278 JB |
882 | { |
883 | QUIT; | |
884 | Fprogn (body); | |
885 | } | |
886 | ||
887 | UNGCPRO; | |
888 | return Qnil; | |
889 | } | |
890 | ||
891 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
892 | "Return result of expanding macros at top level of FORM.\n\ | |
893 | If FORM is not a macro call, it is returned unchanged.\n\ | |
894 | Otherwise, the macro is expanded and the expansion is considered\n\ | |
895 | in place of FORM. When a non-macro-call results, it is returned.\n\n\ | |
80c05374 | 896 | The second optional arg ENVIRONMENT specifies an environment of macro\n\ |
db9f0278 | 897 | definitions to shadow the loaded ones for use in file byte-compilation.") |
79e8bfbf | 898 | (form, environment) |
2e267a2e | 899 | Lisp_Object form; |
79e8bfbf | 900 | Lisp_Object environment; |
db9f0278 | 901 | { |
23d6b5a6 | 902 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
903 | register Lisp_Object expander, sym, def, tem; |
904 | ||
905 | while (1) | |
906 | { | |
907 | /* Come back here each time we expand a macro call, | |
908 | in case it expands into another macro call. */ | |
90165123 | 909 | if (!CONSP (form)) |
db9f0278 | 910 | break; |
23d6b5a6 | 911 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 912 | def = sym = XCAR (form); |
23d6b5a6 | 913 | tem = Qnil; |
db9f0278 JB |
914 | /* Trace symbols aliases to other symbols |
915 | until we get a symbol that is not an alias. */ | |
90165123 | 916 | while (SYMBOLP (def)) |
db9f0278 JB |
917 | { |
918 | QUIT; | |
23d6b5a6 | 919 | sym = def; |
79e8bfbf | 920 | tem = Fassq (sym, environment); |
265a9e55 | 921 | if (NILP (tem)) |
db9f0278 JB |
922 | { |
923 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
924 | if (!EQ (def, Qunbound)) |
925 | continue; | |
db9f0278 | 926 | } |
23d6b5a6 | 927 | break; |
db9f0278 | 928 | } |
79e8bfbf | 929 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 930 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 931 | if (NILP (tem)) |
db9f0278 | 932 | { |
79e8bfbf | 933 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 934 | Look at its function definition. */ |
90165123 | 935 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
936 | /* Not defined or definition not suitable */ |
937 | break; | |
03699b14 | 938 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
939 | { |
940 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 941 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 942 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
943 | /* Yes, load it and try again. */ |
944 | { | |
ca20916b RS |
945 | struct gcpro gcpro1; |
946 | GCPRO1 (form); | |
ee9ee63c | 947 | do_autoload (def, sym); |
ca20916b | 948 | UNGCPRO; |
ee9ee63c JB |
949 | continue; |
950 | } | |
951 | else | |
db9f0278 | 952 | break; |
db9f0278 | 953 | } |
03699b14 | 954 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 955 | break; |
03699b14 | 956 | else expander = XCDR (def); |
db9f0278 JB |
957 | } |
958 | else | |
959 | { | |
03699b14 | 960 | expander = XCDR (tem); |
265a9e55 | 961 | if (NILP (expander)) |
db9f0278 JB |
962 | break; |
963 | } | |
03699b14 | 964 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
965 | } |
966 | return form; | |
967 | } | |
968 | \f | |
969 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
1182a7cb | 970 | "Eval BODY allowing nonlocal exits using `throw'.\n\ |
4e306308 RS |
971 | TAG is evalled to get the tag to use; it must not be nil.\n\ |
972 | \n\ | |
973 | Then the BODY is executed.\n\ | |
db9f0278 JB |
974 | Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.\n\ |
975 | If no throw happens, `catch' returns the value of the last BODY form.\n\ | |
976 | If a throw happens, it specifies the value to return from `catch'.") | |
977 | (args) | |
978 | Lisp_Object args; | |
979 | { | |
980 | register Lisp_Object tag; | |
981 | struct gcpro gcpro1; | |
982 | ||
983 | GCPRO1 (args); | |
984 | tag = Feval (Fcar (args)); | |
985 | UNGCPRO; | |
986 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
987 | } | |
988 | ||
989 | /* Set up a catch, then call C function FUNC on argument ARG. | |
990 | FUNC should return a Lisp_Object. | |
991 | This is how catches are done from within C code. */ | |
992 | ||
993 | Lisp_Object | |
994 | internal_catch (tag, func, arg) | |
995 | Lisp_Object tag; | |
996 | Lisp_Object (*func) (); | |
997 | Lisp_Object arg; | |
998 | { | |
999 | /* This structure is made part of the chain `catchlist'. */ | |
1000 | struct catchtag c; | |
1001 | ||
1002 | /* Fill in the components of c, and put it on the list. */ | |
1003 | c.next = catchlist; | |
1004 | c.tag = tag; | |
1005 | c.val = Qnil; | |
1006 | c.backlist = backtrace_list; | |
1007 | c.handlerlist = handlerlist; | |
1008 | c.lisp_eval_depth = lisp_eval_depth; | |
1009 | c.pdlcount = specpdl_ptr - specpdl; | |
1010 | c.poll_suppress_count = poll_suppress_count; | |
1011 | c.gcpro = gcprolist; | |
bcf28080 | 1012 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1013 | catchlist = &c; |
1014 | ||
1015 | /* Call FUNC. */ | |
1016 | if (! _setjmp (c.jmp)) | |
1017 | c.val = (*func) (arg); | |
1018 | ||
1019 | /* Throw works by a longjmp that comes right here. */ | |
1020 | catchlist = c.next; | |
1021 | return c.val; | |
1022 | } | |
1023 | ||
ba410f40 JB |
1024 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1025 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1026 | |
ba410f40 JB |
1027 | This is the guts Fthrow and Fsignal; they differ only in the way |
1028 | they choose the catch tag to throw to. A catch tag for a | |
1029 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1030 | |
ba410f40 JB |
1031 | Before each catch is discarded, unbind all special bindings and |
1032 | execute all unwind-protect clauses made above that catch. Unwind | |
1033 | the handler stack as we go, so that the proper handlers are in | |
1034 | effect for each unwind-protect clause we run. At the end, restore | |
1035 | some static info saved in CATCH, and longjmp to the location | |
1036 | specified in the | |
1037 | ||
1038 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
1039 | |
1040 | static void | |
ba410f40 | 1041 | unwind_to_catch (catch, value) |
db9f0278 | 1042 | struct catchtag *catch; |
ba410f40 | 1043 | Lisp_Object value; |
db9f0278 JB |
1044 | { |
1045 | register int last_time; | |
1046 | ||
ba410f40 JB |
1047 | /* Save the value in the tag. */ |
1048 | catch->val = value; | |
1049 | ||
82da7701 | 1050 | /* Restore the polling-suppression count. */ |
1cdc3155 | 1051 | set_poll_suppress_count (catch->poll_suppress_count); |
82da7701 | 1052 | |
db9f0278 JB |
1053 | do |
1054 | { | |
1055 | last_time = catchlist == catch; | |
82da7701 JB |
1056 | |
1057 | /* Unwind the specpdl stack, and then restore the proper set of | |
1058 | handlers. */ | |
db9f0278 JB |
1059 | unbind_to (catchlist->pdlcount, Qnil); |
1060 | handlerlist = catchlist->handlerlist; | |
1061 | catchlist = catchlist->next; | |
1062 | } | |
1063 | while (! last_time); | |
1064 | ||
bcf28080 | 1065 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1066 | gcprolist = catch->gcpro; |
15934ffa RS |
1067 | #ifdef DEBUG_GCPRO |
1068 | if (gcprolist != 0) | |
1069 | gcpro_level = gcprolist->level + 1; | |
1070 | else | |
1071 | gcpro_level = 0; | |
1072 | #endif | |
db9f0278 JB |
1073 | backtrace_list = catch->backlist; |
1074 | lisp_eval_depth = catch->lisp_eval_depth; | |
ba410f40 JB |
1075 | |
1076 | _longjmp (catch->jmp, 1); | |
db9f0278 JB |
1077 | } |
1078 | ||
1079 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
1182a7cb | 1080 | "Throw to the catch for TAG and return VALUE from it.\n\ |
db9f0278 | 1081 | Both TAG and VALUE are evalled.") |
79e8bfbf EN |
1082 | (tag, value) |
1083 | register Lisp_Object tag, value; | |
db9f0278 JB |
1084 | { |
1085 | register struct catchtag *c; | |
1086 | ||
1087 | while (1) | |
1088 | { | |
265a9e55 | 1089 | if (!NILP (tag)) |
db9f0278 JB |
1090 | for (c = catchlist; c; c = c->next) |
1091 | { | |
1092 | if (EQ (c->tag, tag)) | |
79e8bfbf | 1093 | unwind_to_catch (c, value); |
db9f0278 | 1094 | } |
79e8bfbf | 1095 | tag = Fsignal (Qno_catch, Fcons (tag, Fcons (value, Qnil))); |
db9f0278 JB |
1096 | } |
1097 | } | |
1098 | ||
1099 | ||
1100 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
1101 | "Do BODYFORM, protecting with UNWINDFORMS.\n\ | |
db9f0278 JB |
1102 | If BODYFORM completes normally, its value is returned\n\ |
1103 | after executing the UNWINDFORMS.\n\ | |
1104 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.") | |
1105 | (args) | |
1106 | Lisp_Object args; | |
1107 | { | |
1108 | Lisp_Object val; | |
1109 | int count = specpdl_ptr - specpdl; | |
1110 | ||
1111 | record_unwind_protect (0, Fcdr (args)); | |
1112 | val = Feval (Fcar (args)); | |
1113 | return unbind_to (count, val); | |
1114 | } | |
1115 | \f | |
1116 | /* Chain of condition handlers currently in effect. | |
1117 | The elements of this chain are contained in the stack frames | |
1118 | of Fcondition_case and internal_condition_case. | |
1119 | When an error is signaled (by calling Fsignal, below), | |
1120 | this chain is searched for an element that applies. */ | |
1121 | ||
1122 | struct handler *handlerlist; | |
1123 | ||
1124 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
1125 | "Regain control when an error is signaled.\n\ | |
db9f0278 JB |
1126 | executes BODYFORM and returns its value if no error happens.\n\ |
1127 | Each element of HANDLERS looks like (CONDITION-NAME BODY...)\n\ | |
1128 | where the BODY is made of Lisp expressions.\n\n\ | |
1129 | A handler is applicable to an error\n\ | |
1130 | if CONDITION-NAME is one of the error's condition names.\n\ | |
1131 | If an error happens, the first applicable handler is run.\n\ | |
1132 | \n\ | |
633357d4 RS |
1133 | The car of a handler may be a list of condition names\n\ |
1134 | instead of a single condition name.\n\ | |
1135 | \n\ | |
db9f0278 JB |
1136 | When a handler handles an error,\n\ |
1137 | control returns to the condition-case and the handler BODY... is executed\n\ | |
1138 | with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).\n\ | |
1139 | VAR may be nil; then you do not get access to the signal information.\n\ | |
1140 | \n\ | |
1141 | The value of the last BODY form is returned from the condition-case.\n\ | |
1142 | See also the function `signal' for more info.") | |
1143 | (args) | |
1144 | Lisp_Object args; | |
1145 | { | |
1146 | Lisp_Object val; | |
1147 | struct catchtag c; | |
1148 | struct handler h; | |
17401c97 GM |
1149 | register Lisp_Object bodyform, handlers; |
1150 | volatile Lisp_Object var; | |
db9f0278 | 1151 | |
82da7701 JB |
1152 | var = Fcar (args); |
1153 | bodyform = Fcar (Fcdr (args)); | |
1154 | handlers = Fcdr (Fcdr (args)); | |
1155 | CHECK_SYMBOL (var, 0); | |
1156 | ||
1157 | for (val = handlers; ! NILP (val); val = Fcdr (val)) | |
1158 | { | |
1159 | Lisp_Object tem; | |
1160 | tem = Fcar (val); | |
5f96776a RS |
1161 | if (! (NILP (tem) |
1162 | || (CONSP (tem) | |
03699b14 KR |
1163 | && (SYMBOLP (XCAR (tem)) |
1164 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1165 | error ("Invalid condition handler", tem); |
1166 | } | |
db9f0278 JB |
1167 | |
1168 | c.tag = Qnil; | |
1169 | c.val = Qnil; | |
1170 | c.backlist = backtrace_list; | |
1171 | c.handlerlist = handlerlist; | |
1172 | c.lisp_eval_depth = lisp_eval_depth; | |
1173 | c.pdlcount = specpdl_ptr - specpdl; | |
1174 | c.poll_suppress_count = poll_suppress_count; | |
1175 | c.gcpro = gcprolist; | |
bcf28080 | 1176 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1177 | if (_setjmp (c.jmp)) |
1178 | { | |
265a9e55 | 1179 | if (!NILP (h.var)) |
9d58218c RS |
1180 | specbind (h.var, c.val); |
1181 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1182 | |
1183 | /* Note that this just undoes the binding of h.var; whoever | |
1184 | longjumped to us unwound the stack to c.pdlcount before | |
1185 | throwing. */ | |
db9f0278 JB |
1186 | unbind_to (c.pdlcount, Qnil); |
1187 | return val; | |
1188 | } | |
1189 | c.next = catchlist; | |
1190 | catchlist = &c; | |
db9f0278 | 1191 | |
82da7701 JB |
1192 | h.var = var; |
1193 | h.handler = handlers; | |
db9f0278 | 1194 | h.next = handlerlist; |
db9f0278 JB |
1195 | h.tag = &c; |
1196 | handlerlist = &h; | |
1197 | ||
82da7701 | 1198 | val = Feval (bodyform); |
db9f0278 JB |
1199 | catchlist = c.next; |
1200 | handlerlist = h.next; | |
1201 | return val; | |
1202 | } | |
1203 | ||
f029ca5f RS |
1204 | /* Call the function BFUN with no arguments, catching errors within it |
1205 | according to HANDLERS. If there is an error, call HFUN with | |
1206 | one argument which is the data that describes the error: | |
1207 | (SIGNALNAME . DATA) | |
1208 | ||
1209 | HANDLERS can be a list of conditions to catch. | |
1210 | If HANDLERS is Qt, catch all errors. | |
1211 | If HANDLERS is Qerror, catch all errors | |
1212 | but allow the debugger to run if that is enabled. */ | |
1213 | ||
db9f0278 JB |
1214 | Lisp_Object |
1215 | internal_condition_case (bfun, handlers, hfun) | |
1216 | Lisp_Object (*bfun) (); | |
1217 | Lisp_Object handlers; | |
1218 | Lisp_Object (*hfun) (); | |
1219 | { | |
1220 | Lisp_Object val; | |
1221 | struct catchtag c; | |
1222 | struct handler h; | |
1223 | ||
dccfb979 AI |
1224 | #if 0 /* Can't do this check anymore because realize_basic_faces has |
1225 | to BLOCK_INPUT, and can call Lisp. What's really needed is a | |
1226 | flag indicating that we're currently handling a signal. */ | |
01591d17 RS |
1227 | /* Since Fsignal resets this to 0, it had better be 0 now |
1228 | or else we have a potential bug. */ | |
1229 | if (interrupt_input_blocked != 0) | |
1230 | abort (); | |
dccfb979 | 1231 | #endif |
01591d17 | 1232 | |
db9f0278 JB |
1233 | c.tag = Qnil; |
1234 | c.val = Qnil; | |
1235 | c.backlist = backtrace_list; | |
1236 | c.handlerlist = handlerlist; | |
1237 | c.lisp_eval_depth = lisp_eval_depth; | |
1238 | c.pdlcount = specpdl_ptr - specpdl; | |
1239 | c.poll_suppress_count = poll_suppress_count; | |
1240 | c.gcpro = gcprolist; | |
bcf28080 | 1241 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1242 | if (_setjmp (c.jmp)) |
1243 | { | |
9d58218c | 1244 | return (*hfun) (c.val); |
db9f0278 JB |
1245 | } |
1246 | c.next = catchlist; | |
1247 | catchlist = &c; | |
1248 | h.handler = handlers; | |
1249 | h.var = Qnil; | |
db9f0278 JB |
1250 | h.next = handlerlist; |
1251 | h.tag = &c; | |
1252 | handlerlist = &h; | |
1253 | ||
1254 | val = (*bfun) (); | |
1255 | catchlist = c.next; | |
1256 | handlerlist = h.next; | |
1257 | return val; | |
1258 | } | |
1259 | ||
f029ca5f RS |
1260 | /* Like internal_condition_case but call HFUN with ARG as its argument. */ |
1261 | ||
d227775c RS |
1262 | Lisp_Object |
1263 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1264 | Lisp_Object (*bfun) (); | |
1265 | Lisp_Object arg; | |
1266 | Lisp_Object handlers; | |
1267 | Lisp_Object (*hfun) (); | |
1268 | { | |
1269 | Lisp_Object val; | |
1270 | struct catchtag c; | |
1271 | struct handler h; | |
1272 | ||
1273 | c.tag = Qnil; | |
1274 | c.val = Qnil; | |
1275 | c.backlist = backtrace_list; | |
1276 | c.handlerlist = handlerlist; | |
1277 | c.lisp_eval_depth = lisp_eval_depth; | |
1278 | c.pdlcount = specpdl_ptr - specpdl; | |
1279 | c.poll_suppress_count = poll_suppress_count; | |
1280 | c.gcpro = gcprolist; | |
bcf28080 | 1281 | c.byte_stack = byte_stack_list; |
d227775c RS |
1282 | if (_setjmp (c.jmp)) |
1283 | { | |
9d58218c | 1284 | return (*hfun) (c.val); |
d227775c RS |
1285 | } |
1286 | c.next = catchlist; | |
1287 | catchlist = &c; | |
1288 | h.handler = handlers; | |
1289 | h.var = Qnil; | |
1290 | h.next = handlerlist; | |
1291 | h.tag = &c; | |
1292 | handlerlist = &h; | |
1293 | ||
1294 | val = (*bfun) (arg); | |
1295 | catchlist = c.next; | |
1296 | handlerlist = h.next; | |
1297 | return val; | |
1298 | } | |
10b29d41 GM |
1299 | |
1300 | ||
1301 | /* Like internal_condition_case but call HFUN with NARGS as first, | |
1302 | and ARGS as second argument. */ | |
1303 | ||
1304 | Lisp_Object | |
1305 | internal_condition_case_2 (bfun, nargs, args, handlers, hfun) | |
1306 | Lisp_Object (*bfun) (); | |
1307 | int nargs; | |
1308 | Lisp_Object *args; | |
1309 | Lisp_Object handlers; | |
1310 | Lisp_Object (*hfun) (); | |
1311 | { | |
1312 | Lisp_Object val; | |
1313 | struct catchtag c; | |
1314 | struct handler h; | |
1315 | ||
1316 | c.tag = Qnil; | |
1317 | c.val = Qnil; | |
1318 | c.backlist = backtrace_list; | |
1319 | c.handlerlist = handlerlist; | |
1320 | c.lisp_eval_depth = lisp_eval_depth; | |
1321 | c.pdlcount = specpdl_ptr - specpdl; | |
1322 | c.poll_suppress_count = poll_suppress_count; | |
1323 | c.gcpro = gcprolist; | |
1324 | c.byte_stack = byte_stack_list; | |
1325 | if (_setjmp (c.jmp)) | |
1326 | { | |
1327 | return (*hfun) (c.val); | |
1328 | } | |
1329 | c.next = catchlist; | |
1330 | catchlist = &c; | |
1331 | h.handler = handlers; | |
1332 | h.var = Qnil; | |
1333 | h.next = handlerlist; | |
1334 | h.tag = &c; | |
1335 | handlerlist = &h; | |
1336 | ||
1337 | val = (*bfun) (nargs, args); | |
1338 | catchlist = c.next; | |
1339 | handlerlist = h.next; | |
1340 | return val; | |
1341 | } | |
1342 | ||
d227775c | 1343 | \f |
db9f0278 JB |
1344 | static Lisp_Object find_handler_clause (); |
1345 | ||
1346 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
4200e719 | 1347 | "Signal an error. Args are ERROR-SYMBOL and associated DATA.\n\ |
db9f0278 | 1348 | This function does not return.\n\n\ |
4200e719 | 1349 | An error symbol is a symbol with an `error-conditions' property\n\ |
db9f0278 JB |
1350 | that is a list of condition names.\n\ |
1351 | A handler for any of those names will get to handle this signal.\n\ | |
1352 | The symbol `error' should normally be one of them.\n\ | |
1353 | \n\ | |
1354 | DATA should be a list. Its elements are printed as part of the error message.\n\ | |
1355 | If the signal is handled, DATA is made available to the handler.\n\ | |
1356 | See also the function `condition-case'.") | |
4200e719 RS |
1357 | (error_symbol, data) |
1358 | Lisp_Object error_symbol, data; | |
db9f0278 | 1359 | { |
bfa8ca43 AS |
1360 | /* When memory is full, ERROR-SYMBOL is nil, |
1361 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). */ | |
db9f0278 JB |
1362 | register struct handler *allhandlers = handlerlist; |
1363 | Lisp_Object conditions; | |
1364 | extern int gc_in_progress; | |
1365 | extern int waiting_for_input; | |
1366 | Lisp_Object debugger_value; | |
c11d3d17 | 1367 | Lisp_Object string; |
1ea9dec4 | 1368 | Lisp_Object real_error_symbol; |
df6c90d8 | 1369 | extern int display_hourglass_p; |
a2ff3819 | 1370 | struct backtrace *bp; |
db9f0278 | 1371 | |
346598f1 | 1372 | immediate_quit = handling_signal = 0; |
db9f0278 JB |
1373 | if (gc_in_progress || waiting_for_input) |
1374 | abort (); | |
1375 | ||
1376 | TOTALLY_UNBLOCK_INPUT; | |
1377 | ||
1ea9dec4 RS |
1378 | if (NILP (error_symbol)) |
1379 | real_error_symbol = Fcar (data); | |
1380 | else | |
1381 | real_error_symbol = error_symbol; | |
1382 | ||
48f8dfa3 | 1383 | #ifdef HAVE_X_WINDOWS |
df6c90d8 GM |
1384 | if (display_hourglass_p) |
1385 | cancel_hourglass (); | |
48f8dfa3 | 1386 | #endif |
48f8dfa3 | 1387 | |
61ede770 RS |
1388 | /* This hook is used by edebug. */ |
1389 | if (! NILP (Vsignal_hook_function)) | |
f01a9c5b | 1390 | call2 (Vsignal_hook_function, error_symbol, data); |
61ede770 | 1391 | |
1ea9dec4 | 1392 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1393 | |
a2ff3819 GM |
1394 | /* Remember from where signal was called. Skip over the frame for |
1395 | `signal' itself. If a frame for `error' follows, skip that, | |
1396 | too. */ | |
090a072f GM |
1397 | Vsignaling_function = Qnil; |
1398 | if (backtrace_list) | |
1399 | { | |
1400 | bp = backtrace_list->next; | |
1401 | if (bp && bp->function && EQ (*bp->function, Qerror)) | |
1402 | bp = bp->next; | |
1403 | if (bp && bp->function) | |
1404 | Vsignaling_function = *bp->function; | |
1405 | } | |
a2ff3819 | 1406 | |
db9f0278 JB |
1407 | for (; handlerlist; handlerlist = handlerlist->next) |
1408 | { | |
1409 | register Lisp_Object clause; | |
8515044c GM |
1410 | |
1411 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1412 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1413 | ||
1414 | if (specpdl_size + 40 > max_specpdl_size) | |
1415 | max_specpdl_size = specpdl_size + 40; | |
1416 | ||
db9f0278 | 1417 | clause = find_handler_clause (handlerlist->handler, conditions, |
4200e719 | 1418 | error_symbol, data, &debugger_value); |
db9f0278 JB |
1419 | |
1420 | #if 0 /* Most callers are not prepared to handle gc if this returns. | |
1421 | So, since this feature is not very useful, take it out. */ | |
1422 | /* If have called debugger and user wants to continue, | |
1423 | just return nil. */ | |
1424 | if (EQ (clause, Qlambda)) | |
1425 | return debugger_value; | |
1426 | #else | |
1427 | if (EQ (clause, Qlambda)) | |
82da7701 | 1428 | { |
690337b7 KH |
1429 | /* We can't return values to code which signaled an error, but we |
1430 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1431 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1432 | return Qnil; |
1433 | else | |
d3e6f8be | 1434 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1435 | } |
db9f0278 JB |
1436 | #endif |
1437 | ||
265a9e55 | 1438 | if (!NILP (clause)) |
db9f0278 | 1439 | { |
9d58218c | 1440 | Lisp_Object unwind_data; |
db9f0278 | 1441 | struct handler *h = handlerlist; |
9d58218c | 1442 | |
db9f0278 | 1443 | handlerlist = allhandlers; |
1ea9dec4 RS |
1444 | |
1445 | if (NILP (error_symbol)) | |
1446 | unwind_data = data; | |
9d58218c RS |
1447 | else |
1448 | unwind_data = Fcons (error_symbol, data); | |
1449 | h->chosen_clause = clause; | |
1450 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1451 | } |
1452 | } | |
1453 | ||
1454 | handlerlist = allhandlers; | |
1455 | /* If no handler is present now, try to run the debugger, | |
1456 | and if that fails, throw to top level. */ | |
4200e719 | 1457 | find_handler_clause (Qerror, conditions, error_symbol, data, &debugger_value); |
c11d3d17 RS |
1458 | if (catchlist != 0) |
1459 | Fthrow (Qtop_level, Qt); | |
1460 | ||
1ea9dec4 | 1461 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1462 | data = Fcons (error_symbol, data); |
1463 | ||
1464 | string = Ferror_message_string (data); | |
377127ce | 1465 | fatal ("%s", XSTRING (string)->data, 0); |
db9f0278 JB |
1466 | } |
1467 | ||
128c0f66 RM |
1468 | /* Return nonzero iff LIST is a non-nil atom or |
1469 | a list containing one of CONDITIONS. */ | |
1470 | ||
1471 | static int | |
1472 | wants_debugger (list, conditions) | |
1473 | Lisp_Object list, conditions; | |
1474 | { | |
4de86b16 | 1475 | if (NILP (list)) |
128c0f66 RM |
1476 | return 0; |
1477 | if (! CONSP (list)) | |
1478 | return 1; | |
1479 | ||
ab67260b | 1480 | while (CONSP (conditions)) |
128c0f66 | 1481 | { |
ab67260b | 1482 | Lisp_Object this, tail; |
03699b14 KR |
1483 | this = XCAR (conditions); |
1484 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1485 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1486 | return 1; |
03699b14 | 1487 | conditions = XCDR (conditions); |
128c0f66 | 1488 | } |
ab67260b | 1489 | return 0; |
128c0f66 RM |
1490 | } |
1491 | ||
fc950e09 KH |
1492 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1493 | and described by SIGNAL-DATA, should skip the debugger | |
1494 | according to debugger-ignore-errors. */ | |
1495 | ||
1496 | static int | |
1497 | skip_debugger (conditions, data) | |
1498 | Lisp_Object conditions, data; | |
1499 | { | |
1500 | Lisp_Object tail; | |
1501 | int first_string = 1; | |
1502 | Lisp_Object error_message; | |
1503 | ||
17401c97 GM |
1504 | error_message = Qnil; |
1505 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1506 | { |
03699b14 | 1507 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1508 | { |
1509 | if (first_string) | |
1510 | { | |
1511 | error_message = Ferror_message_string (data); | |
1512 | first_string = 0; | |
1513 | } | |
17401c97 | 1514 | |
03699b14 | 1515 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1516 | return 1; |
1517 | } | |
1518 | else | |
1519 | { | |
1520 | Lisp_Object contail; | |
1521 | ||
17401c97 | 1522 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1523 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1524 | return 1; |
1525 | } | |
1526 | } | |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
128c0f66 | 1531 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1532 | There are two ways to pass SIG and DATA: |
9b942ebd | 1533 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1534 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1535 | This is for memory-full errors only. |
1ea9dec4 | 1536 | |
128c0f66 | 1537 | Store value returned from debugger into *DEBUGGER_VALUE_PTR. */ |
db9f0278 JB |
1538 | |
1539 | static Lisp_Object | |
1540 | find_handler_clause (handlers, conditions, sig, data, debugger_value_ptr) | |
1541 | Lisp_Object handlers, conditions, sig, data; | |
1542 | Lisp_Object *debugger_value_ptr; | |
1543 | { | |
1544 | register Lisp_Object h; | |
1545 | register Lisp_Object tem; | |
db9f0278 JB |
1546 | |
1547 | if (EQ (handlers, Qt)) /* t is used by handlers for all conditions, set up by C code. */ | |
1548 | return Qt; | |
61ede770 RS |
1549 | /* error is used similarly, but means print an error message |
1550 | and run the debugger if that is enabled. */ | |
1551 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1552 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1553 | there is a handler. */ | |
db9f0278 | 1554 | { |
61ede770 RS |
1555 | int count = specpdl_ptr - specpdl; |
1556 | int debugger_called = 0; | |
1ea9dec4 | 1557 | Lisp_Object sig_symbol, combined_data; |
9b942ebd RS |
1558 | /* This is set to 1 if we are handling a memory-full error, |
1559 | because these must not run the debugger. | |
1560 | (There is no room in memory to do that!) */ | |
1561 | int no_debugger = 0; | |
1ea9dec4 RS |
1562 | |
1563 | if (NILP (sig)) | |
1564 | { | |
1565 | combined_data = data; | |
1566 | sig_symbol = Fcar (data); | |
9b942ebd | 1567 | no_debugger = 1; |
1ea9dec4 RS |
1568 | } |
1569 | else | |
1570 | { | |
1571 | combined_data = Fcons (sig, data); | |
1572 | sig_symbol = sig; | |
1573 | } | |
61ede770 | 1574 | |
128c0f66 | 1575 | if (wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b | 1576 | { |
b369fa65 | 1577 | #ifdef PROTOTYPES |
88817f3b RS |
1578 | internal_with_output_to_temp_buffer ("*Backtrace*", |
1579 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1580 | Qnil); | |
1581 | #else | |
1582 | internal_with_output_to_temp_buffer ("*Backtrace*", | |
1583 | Fbacktrace, Qnil); | |
1584 | #endif | |
1585 | } | |
9b942ebd RS |
1586 | if (! no_debugger |
1587 | && (EQ (sig_symbol, Qquit) | |
1588 | ? debug_on_quit | |
1589 | : wants_debugger (Vdebug_on_error, conditions)) | |
1ea9dec4 | 1590 | && ! skip_debugger (conditions, combined_data) |
be857679 | 1591 | && when_entered_debugger < num_nonmacro_input_events) |
db9f0278 | 1592 | { |
db9f0278 | 1593 | specbind (Qdebug_on_error, Qnil); |
fc950e09 KH |
1594 | *debugger_value_ptr |
1595 | = call_debugger (Fcons (Qerror, | |
1ea9dec4 | 1596 | Fcons (combined_data, Qnil))); |
61ede770 RS |
1597 | debugger_called = 1; |
1598 | } | |
1599 | /* If there is no handler, return saying whether we ran the debugger. */ | |
1600 | if (EQ (handlers, Qerror)) | |
1601 | { | |
1602 | if (debugger_called) | |
1603 | return unbind_to (count, Qlambda); | |
1604 | return Qt; | |
db9f0278 | 1605 | } |
db9f0278 JB |
1606 | } |
1607 | for (h = handlers; CONSP (h); h = Fcdr (h)) | |
1608 | { | |
5f96776a RS |
1609 | Lisp_Object handler, condit; |
1610 | ||
1611 | handler = Fcar (h); | |
1612 | if (!CONSP (handler)) | |
db9f0278 | 1613 | continue; |
5f96776a RS |
1614 | condit = Fcar (handler); |
1615 | /* Handle a single condition name in handler HANDLER. */ | |
1616 | if (SYMBOLP (condit)) | |
1617 | { | |
1618 | tem = Fmemq (Fcar (handler), conditions); | |
1619 | if (!NILP (tem)) | |
1620 | return handler; | |
1621 | } | |
1622 | /* Handle a list of condition names in handler HANDLER. */ | |
1623 | else if (CONSP (condit)) | |
1624 | { | |
1625 | while (CONSP (condit)) | |
1626 | { | |
1627 | tem = Fmemq (Fcar (condit), conditions); | |
1628 | if (!NILP (tem)) | |
1629 | return handler; | |
03699b14 | 1630 | condit = XCDR (condit); |
5f96776a RS |
1631 | } |
1632 | } | |
db9f0278 JB |
1633 | } |
1634 | return Qnil; | |
1635 | } | |
1636 | ||
1637 | /* dump an error message; called like printf */ | |
1638 | ||
1639 | /* VARARGS 1 */ | |
1640 | void | |
1641 | error (m, a1, a2, a3) | |
1642 | char *m; | |
9125da08 | 1643 | char *a1, *a2, *a3; |
db9f0278 JB |
1644 | { |
1645 | char buf[200]; | |
9125da08 RS |
1646 | int size = 200; |
1647 | int mlen; | |
1648 | char *buffer = buf; | |
1649 | char *args[3]; | |
1650 | int allocated = 0; | |
1651 | Lisp_Object string; | |
1652 | ||
1653 | args[0] = a1; | |
1654 | args[1] = a2; | |
1655 | args[2] = a3; | |
1656 | ||
1657 | mlen = strlen (m); | |
db9f0278 JB |
1658 | |
1659 | while (1) | |
9125da08 | 1660 | { |
955f3ff9 | 1661 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
1662 | if (used < size) |
1663 | break; | |
1664 | size *= 2; | |
1665 | if (allocated) | |
1666 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
1667 | else |
1668 | { | |
1669 | buffer = (char *) xmalloc (size); | |
1670 | allocated = 1; | |
1671 | } | |
9125da08 RS |
1672 | } |
1673 | ||
955f3ff9 | 1674 | string = build_string (buffer); |
9125da08 | 1675 | if (allocated) |
9ae6734f | 1676 | xfree (buffer); |
9125da08 RS |
1677 | |
1678 | Fsignal (Qerror, Fcons (string, Qnil)); | |
9402dba5 | 1679 | abort (); |
db9f0278 JB |
1680 | } |
1681 | \f | |
1682 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 1, 0, | |
1683 | "T if FUNCTION makes provisions for interactive calling.\n\ | |
1684 | This means it contains a description for how to read arguments to give it.\n\ | |
1685 | The value is nil for an invalid function or a symbol with no function\n\ | |
1686 | definition.\n\ | |
1687 | \n\ | |
1688 | Interactively callable functions include strings and vectors (treated\n\ | |
1689 | as keyboard macros), lambda-expressions that contain a top-level call\n\ | |
1690 | to `interactive', autoload definitions made by `autoload' with non-nil\n\ | |
1691 | fourth argument, and some of the built-in functions of Lisp.\n\ | |
1692 | \n\ | |
1693 | Also, a symbol satisfies `commandp' if its function definition does so.") | |
1694 | (function) | |
1695 | Lisp_Object function; | |
1696 | { | |
1697 | register Lisp_Object fun; | |
1698 | register Lisp_Object funcar; | |
db9f0278 JB |
1699 | |
1700 | fun = function; | |
1701 | ||
ffd56f97 JB |
1702 | fun = indirect_function (fun); |
1703 | if (EQ (fun, Qunbound)) | |
1704 | return Qnil; | |
db9f0278 JB |
1705 | |
1706 | /* Emacs primitives are interactive if their DEFUN specifies an | |
1707 | interactive spec. */ | |
90165123 | 1708 | if (SUBRP (fun)) |
db9f0278 JB |
1709 | { |
1710 | if (XSUBR (fun)->prompt) | |
1711 | return Qt; | |
1712 | else | |
1713 | return Qnil; | |
1714 | } | |
1715 | ||
1716 | /* Bytecode objects are interactive if they are long enough to | |
1717 | have an element whose index is COMPILED_INTERACTIVE, which is | |
1718 | where the interactive spec is stored. */ | |
90165123 | 1719 | else if (COMPILEDP (fun)) |
f9b4aacf | 1720 | return ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
db9f0278 JB |
1721 | ? Qt : Qnil); |
1722 | ||
1723 | /* Strings and vectors are keyboard macros. */ | |
90165123 | 1724 | if (STRINGP (fun) || VECTORP (fun)) |
db9f0278 JB |
1725 | return Qt; |
1726 | ||
1727 | /* Lists may represent commands. */ | |
1728 | if (!CONSP (fun)) | |
1729 | return Qnil; | |
1730 | funcar = Fcar (fun); | |
90165123 | 1731 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
1732 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
1733 | if (EQ (funcar, Qlambda)) | |
1734 | return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
1735 | if (EQ (funcar, Qmocklisp)) | |
1736 | return Qt; /* All mocklisp functions can be called interactively */ | |
1737 | if (EQ (funcar, Qautoload)) | |
1738 | return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
1739 | else | |
1740 | return Qnil; | |
1741 | } | |
1742 | ||
1743 | /* ARGSUSED */ | |
1744 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, | |
1745 | "Define FUNCTION to autoload from FILE.\n\ | |
1746 | FUNCTION is a symbol; FILE is a file name string to pass to `load'.\n\ | |
1747 | Third arg DOCSTRING is documentation for the function.\n\ | |
1748 | Fourth arg INTERACTIVE if non-nil says function can be called interactively.\n\ | |
ee9ee63c JB |
1749 | Fifth arg TYPE indicates the type of the object:\n\ |
1750 | nil or omitted says FUNCTION is a function,\n\ | |
1751 | `keymap' says FUNCTION is really a keymap, and\n\ | |
1752 | `macro' or t says FUNCTION is really a macro.\n\ | |
db9f0278 JB |
1753 | Third through fifth args give info about the real definition.\n\ |
1754 | They default to nil.\n\ | |
1755 | If FUNCTION is already defined other than as an autoload,\n\ | |
1756 | this does nothing and returns nil.") | |
ee9ee63c JB |
1757 | (function, file, docstring, interactive, type) |
1758 | Lisp_Object function, file, docstring, interactive, type; | |
db9f0278 JB |
1759 | { |
1760 | #ifdef NO_ARG_ARRAY | |
1761 | Lisp_Object args[4]; | |
1762 | #endif | |
1763 | ||
1764 | CHECK_SYMBOL (function, 0); | |
1765 | CHECK_STRING (file, 1); | |
1766 | ||
1767 | /* If function is defined and not as an autoload, don't override */ | |
1768 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 1769 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 1770 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
1771 | return Qnil; |
1772 | ||
7973e637 SM |
1773 | if (NILP (Vpurify_flag)) |
1774 | /* Only add entries after dumping, because the ones before are | |
1775 | not useful and else we get loads of them from the loaddefs.el. */ | |
1776 | LOADHIST_ATTACH (Fcons (Qautoload, function)); | |
1777 | ||
db9f0278 JB |
1778 | #ifdef NO_ARG_ARRAY |
1779 | args[0] = file; | |
1780 | args[1] = docstring; | |
1781 | args[2] = interactive; | |
ee9ee63c | 1782 | args[3] = type; |
db9f0278 JB |
1783 | |
1784 | return Ffset (function, Fcons (Qautoload, Flist (4, &args[0]))); | |
1785 | #else /* NO_ARG_ARRAY */ | |
1786 | return Ffset (function, Fcons (Qautoload, Flist (4, &file))); | |
1787 | #endif /* not NO_ARG_ARRAY */ | |
1788 | } | |
1789 | ||
1790 | Lisp_Object | |
1791 | un_autoload (oldqueue) | |
1792 | Lisp_Object oldqueue; | |
1793 | { | |
1794 | register Lisp_Object queue, first, second; | |
1795 | ||
1796 | /* Queue to unwind is current value of Vautoload_queue. | |
1797 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
1798 | queue = Vautoload_queue; | |
1799 | Vautoload_queue = oldqueue; | |
1800 | while (CONSP (queue)) | |
1801 | { | |
1802 | first = Fcar (queue); | |
1803 | second = Fcdr (first); | |
1804 | first = Fcar (first); | |
1805 | if (EQ (second, Qnil)) | |
1806 | Vfeatures = first; | |
1807 | else | |
1808 | Ffset (first, second); | |
1809 | queue = Fcdr (queue); | |
1810 | } | |
1811 | return Qnil; | |
1812 | } | |
1813 | ||
ca20916b RS |
1814 | /* Load an autoloaded function. |
1815 | FUNNAME is the symbol which is the function's name. | |
1816 | FUNDEF is the autoload definition (a list). */ | |
1817 | ||
045ba794 | 1818 | void |
db9f0278 JB |
1819 | do_autoload (fundef, funname) |
1820 | Lisp_Object fundef, funname; | |
1821 | { | |
1822 | int count = specpdl_ptr - specpdl; | |
cb81ac97 | 1823 | Lisp_Object fun, queue, first, second; |
ca20916b | 1824 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 JB |
1825 | |
1826 | fun = funname; | |
1827 | CHECK_SYMBOL (funname, 0); | |
ca20916b | 1828 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 1829 | |
f87740dc RS |
1830 | /* Preserve the match data. */ |
1831 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
1832 | ||
1833 | /* Value saved here is to be restored into Vautoload_queue. */ | |
db9f0278 JB |
1834 | record_unwind_protect (un_autoload, Vautoload_queue); |
1835 | Vautoload_queue = Qt; | |
4aac2302 | 1836 | Fload (Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil, Qt); |
2a49b6e5 | 1837 | |
f87740dc | 1838 | /* Save the old autoloads, in case we ever do an unload. */ |
2a49b6e5 RS |
1839 | queue = Vautoload_queue; |
1840 | while (CONSP (queue)) | |
1841 | { | |
1842 | first = Fcar (queue); | |
1843 | second = Fcdr (first); | |
1844 | first = Fcar (first); | |
5739ce6b ER |
1845 | |
1846 | /* Note: This test is subtle. The cdr of an autoload-queue entry | |
1847 | may be an atom if the autoload entry was generated by a defalias | |
f87740dc | 1848 | or fset. */ |
5739ce6b | 1849 | if (CONSP (second)) |
03e267c2 | 1850 | Fput (first, Qautoload, (Fcdr (second))); |
5739ce6b | 1851 | |
2a49b6e5 RS |
1852 | queue = Fcdr (queue); |
1853 | } | |
1854 | ||
db9f0278 JB |
1855 | /* Once loading finishes, don't undo it. */ |
1856 | Vautoload_queue = Qt; | |
1857 | unbind_to (count, Qnil); | |
1858 | ||
ffd56f97 JB |
1859 | fun = Findirect_function (fun); |
1860 | ||
76c2b0cc | 1861 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 JB |
1862 | error ("Autoloading failed to define function %s", |
1863 | XSYMBOL (funname)->name->data); | |
ca20916b | 1864 | UNGCPRO; |
db9f0278 | 1865 | } |
4c576a83 | 1866 | |
db9f0278 JB |
1867 | \f |
1868 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
1869 | "Evaluate FORM and return its value.") | |
1870 | (form) | |
1871 | Lisp_Object form; | |
1872 | { | |
1873 | Lisp_Object fun, val, original_fun, original_args; | |
1874 | Lisp_Object funcar; | |
1875 | struct backtrace backtrace; | |
1876 | struct gcpro gcpro1, gcpro2, gcpro3; | |
1877 | ||
4c576a83 | 1878 | if (handling_signal) |
48f8dfa3 GM |
1879 | abort (); |
1880 | ||
90165123 | 1881 | if (SYMBOLP (form)) |
db9f0278 JB |
1882 | { |
1883 | if (EQ (Vmocklisp_arguments, Qt)) | |
1884 | return Fsymbol_value (form); | |
1885 | val = Fsymbol_value (form); | |
265a9e55 | 1886 | if (NILP (val)) |
a631e24c | 1887 | XSETFASTINT (val, 0); |
db9f0278 | 1888 | else if (EQ (val, Qt)) |
a631e24c | 1889 | XSETFASTINT (val, 1); |
db9f0278 JB |
1890 | return val; |
1891 | } | |
1892 | if (!CONSP (form)) | |
1893 | return form; | |
1894 | ||
1895 | QUIT; | |
1896 | if (consing_since_gc > gc_cons_threshold) | |
1897 | { | |
1898 | GCPRO1 (form); | |
1899 | Fgarbage_collect (); | |
1900 | UNGCPRO; | |
1901 | } | |
1902 | ||
1903 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
1904 | { | |
1905 | if (max_lisp_eval_depth < 100) | |
1906 | max_lisp_eval_depth = 100; | |
1907 | if (lisp_eval_depth > max_lisp_eval_depth) | |
1908 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
1909 | } | |
1910 | ||
1911 | original_fun = Fcar (form); | |
1912 | original_args = Fcdr (form); | |
1913 | ||
1914 | backtrace.next = backtrace_list; | |
1915 | backtrace_list = &backtrace; | |
1916 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
1917 | backtrace.args = &original_args; | |
1918 | backtrace.nargs = UNEVALLED; | |
1919 | backtrace.evalargs = 1; | |
1920 | backtrace.debug_on_exit = 0; | |
1921 | ||
1922 | if (debug_on_next_call) | |
1923 | do_debug_on_call (Qt); | |
1924 | ||
1925 | /* At this point, only original_fun and original_args | |
1926 | have values that will be used below */ | |
1927 | retry: | |
ffd56f97 | 1928 | fun = Findirect_function (original_fun); |
db9f0278 | 1929 | |
90165123 | 1930 | if (SUBRP (fun)) |
db9f0278 JB |
1931 | { |
1932 | Lisp_Object numargs; | |
166c822d | 1933 | Lisp_Object argvals[8]; |
db9f0278 JB |
1934 | Lisp_Object args_left; |
1935 | register int i, maxargs; | |
1936 | ||
1937 | args_left = original_args; | |
1938 | numargs = Flength (args_left); | |
1939 | ||
1940 | if (XINT (numargs) < XSUBR (fun)->min_args || | |
1941 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
1942 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
1943 | ||
1944 | if (XSUBR (fun)->max_args == UNEVALLED) | |
1945 | { | |
1946 | backtrace.evalargs = 0; | |
1947 | val = (*XSUBR (fun)->function) (args_left); | |
1948 | goto done; | |
1949 | } | |
1950 | ||
1951 | if (XSUBR (fun)->max_args == MANY) | |
1952 | { | |
1953 | /* Pass a vector of evaluated arguments */ | |
1954 | Lisp_Object *vals; | |
1955 | register int argnum = 0; | |
1956 | ||
1957 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
1958 | ||
1959 | GCPRO3 (args_left, fun, fun); | |
1960 | gcpro3.var = vals; | |
1961 | gcpro3.nvars = 0; | |
1962 | ||
265a9e55 | 1963 | while (!NILP (args_left)) |
db9f0278 JB |
1964 | { |
1965 | vals[argnum++] = Feval (Fcar (args_left)); | |
1966 | args_left = Fcdr (args_left); | |
1967 | gcpro3.nvars = argnum; | |
1968 | } | |
db9f0278 JB |
1969 | |
1970 | backtrace.args = vals; | |
1971 | backtrace.nargs = XINT (numargs); | |
1972 | ||
1973 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 1974 | UNGCPRO; |
db9f0278 JB |
1975 | goto done; |
1976 | } | |
1977 | ||
1978 | GCPRO3 (args_left, fun, fun); | |
1979 | gcpro3.var = argvals; | |
1980 | gcpro3.nvars = 0; | |
1981 | ||
1982 | maxargs = XSUBR (fun)->max_args; | |
1983 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
1984 | { | |
1985 | argvals[i] = Feval (Fcar (args_left)); | |
1986 | gcpro3.nvars = ++i; | |
1987 | } | |
1988 | ||
1989 | UNGCPRO; | |
1990 | ||
1991 | backtrace.args = argvals; | |
1992 | backtrace.nargs = XINT (numargs); | |
1993 | ||
1994 | switch (i) | |
1995 | { | |
1996 | case 0: | |
1997 | val = (*XSUBR (fun)->function) (); | |
1998 | goto done; | |
1999 | case 1: | |
2000 | val = (*XSUBR (fun)->function) (argvals[0]); | |
2001 | goto done; | |
2002 | case 2: | |
2003 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
2004 | goto done; | |
2005 | case 3: | |
2006 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2007 | argvals[2]); | |
2008 | goto done; | |
2009 | case 4: | |
2010 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2011 | argvals[2], argvals[3]); | |
2012 | goto done; | |
2013 | case 5: | |
2014 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2015 | argvals[3], argvals[4]); | |
2016 | goto done; | |
2017 | case 6: | |
2018 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2019 | argvals[3], argvals[4], argvals[5]); | |
2020 | goto done; | |
15c65264 RS |
2021 | case 7: |
2022 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2023 | argvals[3], argvals[4], argvals[5], | |
2024 | argvals[6]); | |
2025 | goto done; | |
db9f0278 | 2026 | |
166c822d KH |
2027 | case 8: |
2028 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2029 | argvals[3], argvals[4], argvals[5], | |
2030 | argvals[6], argvals[7]); | |
2031 | goto done; | |
2032 | ||
db9f0278 | 2033 | default: |
08564963 JB |
2034 | /* Someone has created a subr that takes more arguments than |
2035 | is supported by this code. We need to either rewrite the | |
2036 | subr to use a different argument protocol, or add more | |
2037 | cases to this switch. */ | |
2038 | abort (); | |
db9f0278 JB |
2039 | } |
2040 | } | |
90165123 | 2041 | if (COMPILEDP (fun)) |
db9f0278 JB |
2042 | val = apply_lambda (fun, original_args, 1); |
2043 | else | |
2044 | { | |
2045 | if (!CONSP (fun)) | |
2046 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2047 | funcar = Fcar (fun); | |
90165123 | 2048 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
2049 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
2050 | if (EQ (funcar, Qautoload)) | |
2051 | { | |
2052 | do_autoload (fun, original_fun); | |
2053 | goto retry; | |
2054 | } | |
2055 | if (EQ (funcar, Qmacro)) | |
2056 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
2057 | else if (EQ (funcar, Qlambda)) | |
2058 | val = apply_lambda (fun, original_args, 1); | |
2059 | else if (EQ (funcar, Qmocklisp)) | |
2060 | val = ml_apply (fun, original_args); | |
2061 | else | |
2062 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2063 | } | |
2064 | done: | |
2065 | if (!EQ (Vmocklisp_arguments, Qt)) | |
2066 | { | |
265a9e55 | 2067 | if (NILP (val)) |
a631e24c | 2068 | XSETFASTINT (val, 0); |
db9f0278 | 2069 | else if (EQ (val, Qt)) |
a631e24c | 2070 | XSETFASTINT (val, 1); |
db9f0278 JB |
2071 | } |
2072 | lisp_eval_depth--; | |
2073 | if (backtrace.debug_on_exit) | |
2074 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2075 | backtrace_list = backtrace.next; | |
2076 | return val; | |
2077 | } | |
2078 | \f | |
2079 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
2080 | "Call FUNCTION with our remaining args, using our last arg as list of args.\n\ | |
fd7fe9a1 | 2081 | Then return the value FUNCTION returns.\n\ |
db9f0278 JB |
2082 | Thus, (apply '+ 1 2 '(3 4)) returns 10.") |
2083 | (nargs, args) | |
2084 | int nargs; | |
2085 | Lisp_Object *args; | |
2086 | { | |
2087 | register int i, numargs; | |
2088 | register Lisp_Object spread_arg; | |
2089 | register Lisp_Object *funcall_args; | |
db9f0278 | 2090 | Lisp_Object fun; |
a6e3fa71 | 2091 | struct gcpro gcpro1; |
db9f0278 JB |
2092 | |
2093 | fun = args [0]; | |
2094 | funcall_args = 0; | |
2095 | spread_arg = args [nargs - 1]; | |
2096 | CHECK_LIST (spread_arg, nargs); | |
2097 | ||
2098 | numargs = XINT (Flength (spread_arg)); | |
2099 | ||
2100 | if (numargs == 0) | |
2101 | return Ffuncall (nargs - 1, args); | |
2102 | else if (numargs == 1) | |
2103 | { | |
03699b14 | 2104 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2105 | return Ffuncall (nargs, args); |
2106 | } | |
2107 | ||
a6e3fa71 | 2108 | numargs += nargs - 2; |
db9f0278 | 2109 | |
ffd56f97 JB |
2110 | fun = indirect_function (fun); |
2111 | if (EQ (fun, Qunbound)) | |
db9f0278 | 2112 | { |
ffd56f97 JB |
2113 | /* Let funcall get the error */ |
2114 | fun = args[0]; | |
2115 | goto funcall; | |
db9f0278 JB |
2116 | } |
2117 | ||
90165123 | 2118 | if (SUBRP (fun)) |
db9f0278 JB |
2119 | { |
2120 | if (numargs < XSUBR (fun)->min_args | |
2121 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2122 | goto funcall; /* Let funcall get the error */ | |
2123 | else if (XSUBR (fun)->max_args > numargs) | |
2124 | { | |
2125 | /* Avoid making funcall cons up a yet another new vector of arguments | |
2126 | by explicitly supplying nil's for optional values */ | |
2127 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
2128 | * sizeof (Lisp_Object)); | |
2129 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
2130 | funcall_args[++i] = Qnil; | |
a6e3fa71 JB |
2131 | GCPRO1 (*funcall_args); |
2132 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2133 | } |
2134 | } | |
2135 | funcall: | |
2136 | /* We add 1 to numargs because funcall_args includes the | |
2137 | function itself as well as its arguments. */ | |
2138 | if (!funcall_args) | |
a6e3fa71 JB |
2139 | { |
2140 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
2141 | * sizeof (Lisp_Object)); | |
2142 | GCPRO1 (*funcall_args); | |
2143 | gcpro1.nvars = 1 + numargs; | |
2144 | } | |
2145 | ||
db9f0278 JB |
2146 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
2147 | /* Spread the last arg we got. Its first element goes in | |
2148 | the slot that it used to occupy, hence this value of I. */ | |
2149 | i = nargs - 1; | |
265a9e55 | 2150 | while (!NILP (spread_arg)) |
db9f0278 | 2151 | { |
03699b14 KR |
2152 | funcall_args [i++] = XCAR (spread_arg); |
2153 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2154 | } |
a6e3fa71 JB |
2155 | |
2156 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
2157 | } |
2158 | \f | |
ff936e53 SM |
2159 | /* Run hook variables in various ways. */ |
2160 | ||
2161 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2162 | ||
8b5176cd | 2163 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
ff936e53 SM |
2164 | "Run each hook in HOOKS. Major mode functions use this.\n\ |
2165 | Each argument should be a symbol, a hook variable.\n\ | |
2166 | These symbols are processed in the order specified.\n\ | |
2167 | If a hook symbol has a non-nil value, that value may be a function\n\ | |
2168 | or a list of functions to be called to run the hook.\n\ | |
2169 | If the value is a function, it is called with no arguments.\n\ | |
2170 | If it is a list, the elements are called, in order, with no arguments.\n\ | |
2171 | \n\ | |
2172 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2173 | not `make-local-variable'.") | |
2174 | (nargs, args) | |
2175 | int nargs; | |
2176 | Lisp_Object *args; | |
2177 | { | |
2178 | Lisp_Object hook[1]; | |
2179 | register int i; | |
2180 | ||
2181 | for (i = 0; i < nargs; i++) | |
2182 | { | |
2183 | hook[0] = args[i]; | |
2184 | run_hook_with_args (1, hook, to_completion); | |
2185 | } | |
2186 | ||
2187 | return Qnil; | |
2188 | } | |
2189 | ||
a0d76c27 EN |
2190 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
2191 | Srun_hook_with_args, 1, MANY, 0, | |
b0b667cb KH |
2192 | "Run HOOK with the specified arguments ARGS.\n\ |
2193 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil\n\ | |
2194 | value, that value may be a function or a list of functions to be\n\ | |
2195 | called to run the hook. If the value is a function, it is called with\n\ | |
2196 | the given arguments and its return value is returned. If it is a list\n\ | |
2197 | of functions, those functions are called, in order,\n\ | |
2198 | with the given arguments ARGS.\n\ | |
2199 | It is best not to depend on the value return by `run-hook-with-args',\n\ | |
2200 | as that may change.\n\ | |
2201 | \n\ | |
ff936e53 SM |
2202 | To make a hook variable buffer-local, use `make-local-hook',\n\ |
2203 | not `make-local-variable'.") | |
2204 | (nargs, args) | |
2205 | int nargs; | |
2206 | Lisp_Object *args; | |
2207 | { | |
2208 | return run_hook_with_args (nargs, args, to_completion); | |
2209 | } | |
2210 | ||
a0d76c27 EN |
2211 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
2212 | Srun_hook_with_args_until_success, 1, MANY, 0, | |
ff936e53 SM |
2213 | "Run HOOK with the specified arguments ARGS.\n\ |
2214 | HOOK should be a symbol, a hook variable. Its value should\n\ | |
2215 | be a list of functions. We call those functions, one by one,\n\ | |
2216 | passing arguments ARGS to each of them, until one of them\n\ | |
2217 | returns a non-nil value. Then we return that value.\n\ | |
2218 | If all the functions return nil, we return nil.\n\ | |
2219 | \n\ | |
2220 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2221 | not `make-local-variable'.") | |
b0b667cb KH |
2222 | (nargs, args) |
2223 | int nargs; | |
2224 | Lisp_Object *args; | |
2225 | { | |
ff936e53 SM |
2226 | return run_hook_with_args (nargs, args, until_success); |
2227 | } | |
2228 | ||
a0d76c27 EN |
2229 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
2230 | Srun_hook_with_args_until_failure, 1, MANY, 0, | |
ff936e53 SM |
2231 | "Run HOOK with the specified arguments ARGS.\n\ |
2232 | HOOK should be a symbol, a hook variable. Its value should\n\ | |
2233 | be a list of functions. We call those functions, one by one,\n\ | |
2234 | passing arguments ARGS to each of them, until one of them\n\ | |
2235 | returns nil. Then we return nil.\n\ | |
2236 | If all the functions return non-nil, we return non-nil.\n\ | |
2237 | \n\ | |
2238 | To make a hook variable buffer-local, use `make-local-hook',\n\ | |
2239 | not `make-local-variable'.") | |
2240 | (nargs, args) | |
2241 | int nargs; | |
2242 | Lisp_Object *args; | |
2243 | { | |
2244 | return run_hook_with_args (nargs, args, until_failure); | |
2245 | } | |
2246 | ||
c933ea05 RS |
2247 | /* ARGS[0] should be a hook symbol. |
2248 | Call each of the functions in the hook value, passing each of them | |
2249 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2250 | COND specifies a condition to test after each call | |
2251 | to decide whether to stop. | |
2252 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2253 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2254 | ||
ff936e53 SM |
2255 | Lisp_Object |
2256 | run_hook_with_args (nargs, args, cond) | |
2257 | int nargs; | |
2258 | Lisp_Object *args; | |
2259 | enum run_hooks_condition cond; | |
2260 | { | |
2261 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2262 | Lisp_Object globals; |
2263 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2264 | |
f029ca5f RS |
2265 | /* If we are dying or still initializing, |
2266 | don't do anything--it would probably crash if we tried. */ | |
2267 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2268 | return Qnil; |
f029ca5f | 2269 | |
b0b667cb | 2270 | sym = args[0]; |
aa681b51 | 2271 | val = find_symbol_value (sym); |
ff936e53 SM |
2272 | ret = (cond == until_failure ? Qt : Qnil); |
2273 | ||
b0b667cb | 2274 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2275 | return ret; |
03699b14 | 2276 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2277 | { |
2278 | args[0] = val; | |
2279 | return Ffuncall (nargs, args); | |
2280 | } | |
2281 | else | |
2282 | { | |
fada05d6 KH |
2283 | globals = Qnil; |
2284 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2285 | |
ff936e53 SM |
2286 | for (; |
2287 | CONSP (val) && ((cond == to_completion) | |
2288 | || (cond == until_success ? NILP (ret) | |
2289 | : !NILP (ret))); | |
03699b14 | 2290 | val = XCDR (val)) |
b0b667cb | 2291 | { |
03699b14 | 2292 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2293 | { |
2294 | /* t indicates this hook has a local binding; | |
2295 | it means to run the global binding too. */ | |
b0b667cb | 2296 | |
ff936e53 SM |
2297 | for (globals = Fdefault_value (sym); |
2298 | CONSP (globals) && ((cond == to_completion) | |
2299 | || (cond == until_success ? NILP (ret) | |
2300 | : !NILP (ret))); | |
03699b14 | 2301 | globals = XCDR (globals)) |
b0b667cb | 2302 | { |
03699b14 | 2303 | args[0] = XCAR (globals); |
77d92e05 RS |
2304 | /* In a global value, t should not occur. If it does, we |
2305 | must ignore it to avoid an endless loop. */ | |
2306 | if (!EQ (args[0], Qt)) | |
2307 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2308 | } |
2309 | } | |
2310 | else | |
2311 | { | |
03699b14 | 2312 | args[0] = XCAR (val); |
ff936e53 | 2313 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2314 | } |
2315 | } | |
cb9d21f8 RS |
2316 | |
2317 | UNGCPRO; | |
ff936e53 | 2318 | return ret; |
b0b667cb KH |
2319 | } |
2320 | } | |
c933ea05 RS |
2321 | |
2322 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2323 | present value of that symbol. | |
2324 | Call each element of FUNLIST, | |
2325 | passing each of them the rest of ARGS. | |
2326 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2327 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2328 | ||
2329 | Lisp_Object | |
2330 | run_hook_list_with_args (funlist, nargs, args) | |
2331 | Lisp_Object funlist; | |
2332 | int nargs; | |
2333 | Lisp_Object *args; | |
2334 | { | |
2335 | Lisp_Object sym; | |
2336 | Lisp_Object val; | |
fada05d6 KH |
2337 | Lisp_Object globals; |
2338 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2339 | |
2340 | sym = args[0]; | |
fada05d6 KH |
2341 | globals = Qnil; |
2342 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2343 | |
03699b14 | 2344 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2345 | { |
03699b14 | 2346 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2347 | { |
2348 | /* t indicates this hook has a local binding; | |
2349 | it means to run the global binding too. */ | |
c933ea05 RS |
2350 | |
2351 | for (globals = Fdefault_value (sym); | |
2352 | CONSP (globals); | |
03699b14 | 2353 | globals = XCDR (globals)) |
c933ea05 | 2354 | { |
03699b14 | 2355 | args[0] = XCAR (globals); |
77d92e05 RS |
2356 | /* In a global value, t should not occur. If it does, we |
2357 | must ignore it to avoid an endless loop. */ | |
2358 | if (!EQ (args[0], Qt)) | |
2359 | Ffuncall (nargs, args); | |
c933ea05 RS |
2360 | } |
2361 | } | |
2362 | else | |
2363 | { | |
03699b14 | 2364 | args[0] = XCAR (val); |
c933ea05 RS |
2365 | Ffuncall (nargs, args); |
2366 | } | |
2367 | } | |
2368 | UNGCPRO; | |
2369 | return Qnil; | |
2370 | } | |
7d48558f RS |
2371 | |
2372 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2373 | ||
2374 | void | |
2375 | run_hook_with_args_2 (hook, arg1, arg2) | |
2376 | Lisp_Object hook, arg1, arg2; | |
2377 | { | |
2378 | Lisp_Object temp[3]; | |
2379 | temp[0] = hook; | |
2380 | temp[1] = arg1; | |
2381 | temp[2] = arg2; | |
2382 | ||
2383 | Frun_hook_with_args (3, temp); | |
2384 | } | |
ff936e53 | 2385 | \f |
db9f0278 JB |
2386 | /* Apply fn to arg */ |
2387 | Lisp_Object | |
2388 | apply1 (fn, arg) | |
2389 | Lisp_Object fn, arg; | |
2390 | { | |
a6e3fa71 JB |
2391 | struct gcpro gcpro1; |
2392 | ||
2393 | GCPRO1 (fn); | |
265a9e55 | 2394 | if (NILP (arg)) |
a6e3fa71 JB |
2395 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2396 | gcpro1.nvars = 2; | |
db9f0278 JB |
2397 | #ifdef NO_ARG_ARRAY |
2398 | { | |
2399 | Lisp_Object args[2]; | |
2400 | args[0] = fn; | |
2401 | args[1] = arg; | |
a6e3fa71 JB |
2402 | gcpro1.var = args; |
2403 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2404 | } |
2405 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2406 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2407 | #endif /* not NO_ARG_ARRAY */ |
2408 | } | |
2409 | ||
2410 | /* Call function fn on no arguments */ | |
2411 | Lisp_Object | |
2412 | call0 (fn) | |
2413 | Lisp_Object fn; | |
2414 | { | |
a6e3fa71 JB |
2415 | struct gcpro gcpro1; |
2416 | ||
2417 | GCPRO1 (fn); | |
2418 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2419 | } |
2420 | ||
15285f9f | 2421 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2422 | /* ARGSUSED */ |
2423 | Lisp_Object | |
15285f9f RS |
2424 | call1 (fn, arg1) |
2425 | Lisp_Object fn, arg1; | |
db9f0278 | 2426 | { |
a6e3fa71 | 2427 | struct gcpro gcpro1; |
db9f0278 | 2428 | #ifdef NO_ARG_ARRAY |
a6e3fa71 JB |
2429 | Lisp_Object args[2]; |
2430 | ||
db9f0278 | 2431 | args[0] = fn; |
15285f9f | 2432 | args[1] = arg1; |
a6e3fa71 JB |
2433 | GCPRO1 (args[0]); |
2434 | gcpro1.nvars = 2; | |
2435 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2436 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2437 | GCPRO1 (fn); |
2438 | gcpro1.nvars = 2; | |
2439 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2440 | #endif /* not NO_ARG_ARRAY */ |
2441 | } | |
2442 | ||
15285f9f | 2443 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2444 | /* ARGSUSED */ |
2445 | Lisp_Object | |
15285f9f RS |
2446 | call2 (fn, arg1, arg2) |
2447 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2448 | { |
a6e3fa71 | 2449 | struct gcpro gcpro1; |
db9f0278 JB |
2450 | #ifdef NO_ARG_ARRAY |
2451 | Lisp_Object args[3]; | |
2452 | args[0] = fn; | |
15285f9f RS |
2453 | args[1] = arg1; |
2454 | args[2] = arg2; | |
a6e3fa71 JB |
2455 | GCPRO1 (args[0]); |
2456 | gcpro1.nvars = 3; | |
2457 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2458 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2459 | GCPRO1 (fn); |
2460 | gcpro1.nvars = 3; | |
2461 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2462 | #endif /* not NO_ARG_ARRAY */ |
2463 | } | |
2464 | ||
15285f9f | 2465 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2466 | /* ARGSUSED */ |
2467 | Lisp_Object | |
15285f9f RS |
2468 | call3 (fn, arg1, arg2, arg3) |
2469 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2470 | { |
a6e3fa71 | 2471 | struct gcpro gcpro1; |
db9f0278 JB |
2472 | #ifdef NO_ARG_ARRAY |
2473 | Lisp_Object args[4]; | |
2474 | args[0] = fn; | |
15285f9f RS |
2475 | args[1] = arg1; |
2476 | args[2] = arg2; | |
2477 | args[3] = arg3; | |
a6e3fa71 JB |
2478 | GCPRO1 (args[0]); |
2479 | gcpro1.nvars = 4; | |
2480 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2481 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2482 | GCPRO1 (fn); |
2483 | gcpro1.nvars = 4; | |
2484 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2485 | #endif /* not NO_ARG_ARRAY */ |
2486 | } | |
2487 | ||
15285f9f | 2488 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2489 | /* ARGSUSED */ |
2490 | Lisp_Object | |
15285f9f RS |
2491 | call4 (fn, arg1, arg2, arg3, arg4) |
2492 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2493 | { |
2494 | struct gcpro gcpro1; | |
2495 | #ifdef NO_ARG_ARRAY | |
2496 | Lisp_Object args[5]; | |
2497 | args[0] = fn; | |
15285f9f RS |
2498 | args[1] = arg1; |
2499 | args[2] = arg2; | |
2500 | args[3] = arg3; | |
2501 | args[4] = arg4; | |
a5a44b91 JB |
2502 | GCPRO1 (args[0]); |
2503 | gcpro1.nvars = 5; | |
2504 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2505 | #else /* not NO_ARG_ARRAY */ | |
2506 | GCPRO1 (fn); | |
2507 | gcpro1.nvars = 5; | |
2508 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2509 | #endif /* not NO_ARG_ARRAY */ | |
2510 | } | |
2511 | ||
15285f9f RS |
2512 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2513 | /* ARGSUSED */ | |
2514 | Lisp_Object | |
2515 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2516 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2517 | { | |
2518 | struct gcpro gcpro1; | |
2519 | #ifdef NO_ARG_ARRAY | |
2520 | Lisp_Object args[6]; | |
2521 | args[0] = fn; | |
2522 | args[1] = arg1; | |
2523 | args[2] = arg2; | |
2524 | args[3] = arg3; | |
2525 | args[4] = arg4; | |
2526 | args[5] = arg5; | |
2527 | GCPRO1 (args[0]); | |
2528 | gcpro1.nvars = 6; | |
2529 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2530 | #else /* not NO_ARG_ARRAY */ | |
2531 | GCPRO1 (fn); | |
2532 | gcpro1.nvars = 6; | |
2533 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2534 | #endif /* not NO_ARG_ARRAY */ | |
2535 | } | |
2536 | ||
2537 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2538 | /* ARGSUSED */ | |
2539 | Lisp_Object | |
2540 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2541 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2542 | { | |
2543 | struct gcpro gcpro1; | |
2544 | #ifdef NO_ARG_ARRAY | |
2545 | Lisp_Object args[7]; | |
2546 | args[0] = fn; | |
2547 | args[1] = arg1; | |
2548 | args[2] = arg2; | |
2549 | args[3] = arg3; | |
2550 | args[4] = arg4; | |
2551 | args[5] = arg5; | |
2552 | args[6] = arg6; | |
2553 | GCPRO1 (args[0]); | |
2554 | gcpro1.nvars = 7; | |
2555 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2556 | #else /* not NO_ARG_ARRAY */ | |
2557 | GCPRO1 (fn); | |
2558 | gcpro1.nvars = 7; | |
2559 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2560 | #endif /* not NO_ARG_ARRAY */ | |
2561 | } | |
2562 | ||
db9f0278 JB |
2563 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
2564 | "Call first argument as a function, passing remaining arguments to it.\n\ | |
fd7fe9a1 | 2565 | Return the value that function returns.\n\ |
db9f0278 JB |
2566 | Thus, (funcall 'cons 'x 'y) returns (x . y).") |
2567 | (nargs, args) | |
2568 | int nargs; | |
2569 | Lisp_Object *args; | |
2570 | { | |
2571 | Lisp_Object fun; | |
2572 | Lisp_Object funcar; | |
2573 | int numargs = nargs - 1; | |
2574 | Lisp_Object lisp_numargs; | |
2575 | Lisp_Object val; | |
2576 | struct backtrace backtrace; | |
2577 | register Lisp_Object *internal_args; | |
2578 | register int i; | |
2579 | ||
2580 | QUIT; | |
2581 | if (consing_since_gc > gc_cons_threshold) | |
a6e3fa71 | 2582 | Fgarbage_collect (); |
db9f0278 JB |
2583 | |
2584 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2585 | { | |
2586 | if (max_lisp_eval_depth < 100) | |
2587 | max_lisp_eval_depth = 100; | |
2588 | if (lisp_eval_depth > max_lisp_eval_depth) | |
2589 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
2590 | } | |
2591 | ||
2592 | backtrace.next = backtrace_list; | |
2593 | backtrace_list = &backtrace; | |
2594 | backtrace.function = &args[0]; | |
2595 | backtrace.args = &args[1]; | |
2596 | backtrace.nargs = nargs - 1; | |
2597 | backtrace.evalargs = 0; | |
2598 | backtrace.debug_on_exit = 0; | |
2599 | ||
2600 | if (debug_on_next_call) | |
2601 | do_debug_on_call (Qlambda); | |
2602 | ||
2603 | retry: | |
2604 | ||
2605 | fun = args[0]; | |
ffd56f97 JB |
2606 | |
2607 | fun = Findirect_function (fun); | |
db9f0278 | 2608 | |
90165123 | 2609 | if (SUBRP (fun)) |
db9f0278 JB |
2610 | { |
2611 | if (numargs < XSUBR (fun)->min_args | |
2612 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2613 | { | |
a631e24c | 2614 | XSETFASTINT (lisp_numargs, numargs); |
db9f0278 JB |
2615 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (lisp_numargs, Qnil))); |
2616 | } | |
2617 | ||
2618 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2619 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2620 | ||
2621 | if (XSUBR (fun)->max_args == MANY) | |
2622 | { | |
2623 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
2624 | goto done; | |
2625 | } | |
2626 | ||
2627 | if (XSUBR (fun)->max_args > numargs) | |
2628 | { | |
2629 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
2630 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
2631 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
2632 | internal_args[i] = Qnil; | |
2633 | } | |
2634 | else | |
2635 | internal_args = args + 1; | |
2636 | switch (XSUBR (fun)->max_args) | |
2637 | { | |
2638 | case 0: | |
2639 | val = (*XSUBR (fun)->function) (); | |
2640 | goto done; | |
2641 | case 1: | |
2642 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
2643 | goto done; | |
2644 | case 2: | |
2645 | val = (*XSUBR (fun)->function) (internal_args[0], | |
2646 | internal_args[1]); | |
2647 | goto done; | |
2648 | case 3: | |
2649 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2650 | internal_args[2]); | |
2651 | goto done; | |
2652 | case 4: | |
2653 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2654 | internal_args[2], | |
2655 | internal_args[3]); | |
2656 | goto done; | |
2657 | case 5: | |
2658 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2659 | internal_args[2], internal_args[3], | |
2660 | internal_args[4]); | |
2661 | goto done; | |
2662 | case 6: | |
2663 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2664 | internal_args[2], internal_args[3], | |
2665 | internal_args[4], internal_args[5]); | |
2666 | goto done; | |
15c65264 RS |
2667 | case 7: |
2668 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2669 | internal_args[2], internal_args[3], | |
2670 | internal_args[4], internal_args[5], | |
2671 | internal_args[6]); | |
2672 | goto done; | |
db9f0278 | 2673 | |
166c822d KH |
2674 | case 8: |
2675 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2676 | internal_args[2], internal_args[3], | |
2677 | internal_args[4], internal_args[5], | |
2678 | internal_args[6], internal_args[7]); | |
2679 | goto done; | |
2680 | ||
db9f0278 | 2681 | default: |
70ee42f7 | 2682 | |
166c822d | 2683 | /* If a subr takes more than 8 arguments without using MANY |
70ee42f7 JB |
2684 | or UNEVALLED, we need to extend this function to support it. |
2685 | Until this is done, there is no way to call the function. */ | |
2686 | abort (); | |
db9f0278 JB |
2687 | } |
2688 | } | |
90165123 | 2689 | if (COMPILEDP (fun)) |
db9f0278 JB |
2690 | val = funcall_lambda (fun, numargs, args + 1); |
2691 | else | |
2692 | { | |
2693 | if (!CONSP (fun)) | |
2694 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2695 | funcar = Fcar (fun); | |
90165123 | 2696 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
2697 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
2698 | if (EQ (funcar, Qlambda)) | |
2699 | val = funcall_lambda (fun, numargs, args + 1); | |
2700 | else if (EQ (funcar, Qmocklisp)) | |
2701 | val = ml_apply (fun, Flist (numargs, args + 1)); | |
2702 | else if (EQ (funcar, Qautoload)) | |
2703 | { | |
2704 | do_autoload (fun, args[0]); | |
2705 | goto retry; | |
2706 | } | |
2707 | else | |
2708 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2709 | } | |
2710 | done: | |
2711 | lisp_eval_depth--; | |
2712 | if (backtrace.debug_on_exit) | |
2713 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2714 | backtrace_list = backtrace.next; | |
2715 | return val; | |
2716 | } | |
2717 | \f | |
2718 | Lisp_Object | |
2719 | apply_lambda (fun, args, eval_flag) | |
2720 | Lisp_Object fun, args; | |
2721 | int eval_flag; | |
2722 | { | |
2723 | Lisp_Object args_left; | |
2724 | Lisp_Object numargs; | |
2725 | register Lisp_Object *arg_vector; | |
2726 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2727 | register int i; | |
2728 | register Lisp_Object tem; | |
2729 | ||
2730 | numargs = Flength (args); | |
2731 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2732 | args_left = args; | |
2733 | ||
2734 | GCPRO3 (*arg_vector, args_left, fun); | |
2735 | gcpro1.nvars = 0; | |
2736 | ||
2737 | for (i = 0; i < XINT (numargs);) | |
2738 | { | |
2739 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
2740 | if (eval_flag) tem = Feval (tem); | |
2741 | arg_vector[i++] = tem; | |
2742 | gcpro1.nvars = i; | |
2743 | } | |
2744 | ||
2745 | UNGCPRO; | |
2746 | ||
2747 | if (eval_flag) | |
2748 | { | |
2749 | backtrace_list->args = arg_vector; | |
2750 | backtrace_list->nargs = i; | |
2751 | } | |
2752 | backtrace_list->evalargs = 0; | |
2753 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
2754 | ||
2755 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
2756 | if (backtrace_list->debug_on_exit) | |
2757 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
2758 | /* Don't do it again when we return to eval. */ | |
2759 | backtrace_list->debug_on_exit = 0; | |
2760 | return tem; | |
2761 | } | |
2762 | ||
2763 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
2764 | and return the result of evaluation. | |
2765 | FUN must be either a lambda-expression or a compiled-code object. */ | |
2766 | ||
2767 | Lisp_Object | |
2768 | funcall_lambda (fun, nargs, arg_vector) | |
2769 | Lisp_Object fun; | |
2770 | int nargs; | |
2771 | register Lisp_Object *arg_vector; | |
2772 | { | |
9ab90667 | 2773 | Lisp_Object val, syms_left, next; |
db9f0278 | 2774 | int count = specpdl_ptr - specpdl; |
9ab90667 | 2775 | int i, optional, rest; |
db9f0278 | 2776 | |
9ab90667 GM |
2777 | if (NILP (Vmocklisp_arguments)) |
2778 | specbind (Qmocklisp_arguments, Qt); /* t means NOT mocklisp! */ | |
db9f0278 | 2779 | |
90165123 | 2780 | if (CONSP (fun)) |
9ab90667 GM |
2781 | { |
2782 | syms_left = XCDR (fun); | |
2783 | if (CONSP (syms_left)) | |
2784 | syms_left = XCAR (syms_left); | |
2785 | else | |
2786 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2787 | } | |
90165123 | 2788 | else if (COMPILEDP (fun)) |
db9f0278 | 2789 | syms_left = XVECTOR (fun)->contents[COMPILED_ARGLIST]; |
9ab90667 GM |
2790 | else |
2791 | abort (); | |
db9f0278 | 2792 | |
9ab90667 GM |
2793 | i = optional = rest = 0; |
2794 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
2795 | { |
2796 | QUIT; | |
9ab90667 GM |
2797 | |
2798 | next = XCAR (syms_left); | |
90165123 | 2799 | while (!SYMBOLP (next)) |
9ffa21d4 | 2800 | next = Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
9ab90667 | 2801 | |
db9f0278 JB |
2802 | if (EQ (next, Qand_rest)) |
2803 | rest = 1; | |
2804 | else if (EQ (next, Qand_optional)) | |
2805 | optional = 1; | |
2806 | else if (rest) | |
2807 | { | |
9ffa21d4 | 2808 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
2809 | i = nargs; |
2810 | } | |
2811 | else if (i < nargs) | |
9ab90667 | 2812 | specbind (next, arg_vector[i++]); |
db9f0278 | 2813 | else if (!optional) |
9ab90667 GM |
2814 | return Fsignal (Qwrong_number_of_arguments, |
2815 | Fcons (fun, Fcons (make_number (nargs), Qnil))); | |
db9f0278 JB |
2816 | else |
2817 | specbind (next, Qnil); | |
2818 | } | |
2819 | ||
9ab90667 GM |
2820 | if (!NILP (syms_left)) |
2821 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2822 | else if (i < nargs) | |
2823 | return Fsignal (Qwrong_number_of_arguments, | |
2824 | Fcons (fun, Fcons (make_number (nargs), Qnil))); | |
db9f0278 | 2825 | |
90165123 | 2826 | if (CONSP (fun)) |
9ab90667 | 2827 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 2828 | else |
ca248607 RS |
2829 | { |
2830 | /* If we have not actually read the bytecode string | |
2831 | and constants vector yet, fetch them from the file. */ | |
2832 | if (CONSP (XVECTOR (fun)->contents[COMPILED_BYTECODE])) | |
661c7d6e | 2833 | Ffetch_bytecode (fun); |
ca248607 RS |
2834 | val = Fbyte_code (XVECTOR (fun)->contents[COMPILED_BYTECODE], |
2835 | XVECTOR (fun)->contents[COMPILED_CONSTANTS], | |
2836 | XVECTOR (fun)->contents[COMPILED_STACK_DEPTH]); | |
2837 | } | |
9ab90667 | 2838 | |
db9f0278 JB |
2839 | return unbind_to (count, val); |
2840 | } | |
661c7d6e KH |
2841 | |
2842 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
2843 | 1, 1, 0, | |
2844 | "If byte-compiled OBJECT is lazy-loaded, fetch it now.") | |
2845 | (object) | |
2846 | Lisp_Object object; | |
2847 | { | |
2848 | Lisp_Object tem; | |
2849 | ||
2850 | if (COMPILEDP (object) | |
2851 | && CONSP (XVECTOR (object)->contents[COMPILED_BYTECODE])) | |
2852 | { | |
2853 | tem = read_doc_string (XVECTOR (object)->contents[COMPILED_BYTECODE]); | |
5bbdb090 RS |
2854 | if (!CONSP (tem)) |
2855 | error ("invalid byte code"); | |
03699b14 KR |
2856 | XVECTOR (object)->contents[COMPILED_BYTECODE] = XCAR (tem); |
2857 | XVECTOR (object)->contents[COMPILED_CONSTANTS] = XCDR (tem); | |
661c7d6e KH |
2858 | } |
2859 | return object; | |
2860 | } | |
db9f0278 JB |
2861 | \f |
2862 | void | |
2863 | grow_specpdl () | |
2864 | { | |
2865 | register int count = specpdl_ptr - specpdl; | |
2866 | if (specpdl_size >= max_specpdl_size) | |
2867 | { | |
2868 | if (max_specpdl_size < 400) | |
2869 | max_specpdl_size = 400; | |
2870 | if (specpdl_size >= max_specpdl_size) | |
2871 | { | |
debee8fe RS |
2872 | if (!NILP (Vdebug_on_error)) |
2873 | /* Leave room for some specpdl in the debugger. */ | |
2874 | max_specpdl_size = specpdl_size + 100; | |
db9f0278 JB |
2875 | Fsignal (Qerror, |
2876 | Fcons (build_string ("Variable binding depth exceeds max-specpdl-size"), Qnil)); | |
db9f0278 JB |
2877 | } |
2878 | } | |
2879 | specpdl_size *= 2; | |
2880 | if (specpdl_size > max_specpdl_size) | |
2881 | specpdl_size = max_specpdl_size; | |
2882 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
2883 | specpdl_ptr = specpdl + count; | |
2884 | } | |
2885 | ||
2886 | void | |
2887 | specbind (symbol, value) | |
2888 | Lisp_Object symbol, value; | |
2889 | { | |
db9f0278 JB |
2890 | Lisp_Object ovalue; |
2891 | ||
9ffa21d4 | 2892 | CHECK_SYMBOL (symbol, 0); |
db9f0278 JB |
2893 | if (specpdl_ptr == specpdl + specpdl_size) |
2894 | grow_specpdl (); | |
719177b3 | 2895 | |
9ab90667 GM |
2896 | /* The most common case is that a non-constant symbol with a trivial |
2897 | value. Make that as fast as we can. */ | |
2898 | if (!MISCP (XSYMBOL (symbol)->value) | |
2899 | && !EQ (symbol, Qnil) | |
2900 | && !EQ (symbol, Qt) | |
2901 | && !(XSYMBOL (symbol)->name->data[0] == ':' | |
2902 | && EQ (XSYMBOL (symbol)->obarray, initial_obarray) | |
9ab90667 | 2903 | && !EQ (value, symbol))) |
719177b3 | 2904 | { |
9ab90667 GM |
2905 | specpdl_ptr->symbol = symbol; |
2906 | specpdl_ptr->old_value = XSYMBOL (symbol)->value; | |
2907 | specpdl_ptr->func = NULL; | |
2908 | ++specpdl_ptr; | |
2909 | XSYMBOL (symbol)->value = value; | |
719177b3 RS |
2910 | } |
2911 | else | |
9ab90667 GM |
2912 | { |
2913 | ovalue = find_symbol_value (symbol); | |
2914 | specpdl_ptr->func = 0; | |
2915 | specpdl_ptr->old_value = ovalue; | |
719177b3 | 2916 | |
9ab90667 GM |
2917 | if (BUFFER_LOCAL_VALUEP (XSYMBOL (symbol)->value) |
2918 | || SOME_BUFFER_LOCAL_VALUEP (XSYMBOL (symbol)->value) | |
2919 | || BUFFER_OBJFWDP (XSYMBOL (symbol)->value)) | |
2920 | { | |
2921 | Lisp_Object current_buffer, binding_buffer; | |
06bccf8e | 2922 | |
9ab90667 GM |
2923 | /* For a local variable, record both the symbol and which |
2924 | buffer's value we are saving. */ | |
2925 | current_buffer = Fcurrent_buffer (); | |
2926 | binding_buffer = current_buffer; | |
06bccf8e | 2927 | |
9ab90667 GM |
2928 | /* If the variable is not local in this buffer, |
2929 | we are saving the global value, so restore that. */ | |
2930 | if (NILP (Flocal_variable_p (symbol, binding_buffer))) | |
2931 | binding_buffer = Qnil; | |
2932 | specpdl_ptr->symbol | |
2933 | = Fcons (symbol, Fcons (binding_buffer, current_buffer)); | |
06bccf8e GM |
2934 | |
2935 | /* If SYMBOL is a per-buffer variable which doesn't have a | |
2936 | buffer-local value here, make the `let' change the global | |
2937 | value by changing the value of SYMBOL in all buffers not | |
2938 | having their own value. This is consistent with what | |
2939 | happens with other buffer-local variables. */ | |
2940 | if (NILP (binding_buffer) | |
2941 | && BUFFER_OBJFWDP (XSYMBOL (symbol)->value)) | |
2942 | { | |
2943 | ++specpdl_ptr; | |
2944 | Fset_default (symbol, value); | |
2945 | return; | |
2946 | } | |
9ab90667 GM |
2947 | } |
2948 | else | |
2949 | specpdl_ptr->symbol = symbol; | |
2950 | ||
2951 | specpdl_ptr++; | |
2952 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) | |
2953 | store_symval_forwarding (symbol, ovalue, value); | |
2954 | else | |
2955 | set_internal (symbol, value, 0, 1); | |
2956 | } | |
db9f0278 JB |
2957 | } |
2958 | ||
2959 | void | |
2960 | record_unwind_protect (function, arg) | |
1d159538 | 2961 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
2962 | Lisp_Object arg; |
2963 | { | |
2964 | if (specpdl_ptr == specpdl + specpdl_size) | |
2965 | grow_specpdl (); | |
2966 | specpdl_ptr->func = function; | |
2967 | specpdl_ptr->symbol = Qnil; | |
2968 | specpdl_ptr->old_value = arg; | |
2969 | specpdl_ptr++; | |
2970 | } | |
2971 | ||
2972 | Lisp_Object | |
2973 | unbind_to (count, value) | |
2974 | int count; | |
2975 | Lisp_Object value; | |
2976 | { | |
265a9e55 | 2977 | int quitf = !NILP (Vquit_flag); |
db9f0278 JB |
2978 | struct gcpro gcpro1; |
2979 | ||
2980 | GCPRO1 (value); | |
db9f0278 JB |
2981 | Vquit_flag = Qnil; |
2982 | ||
2983 | while (specpdl_ptr != specpdl + count) | |
2984 | { | |
2985 | --specpdl_ptr; | |
9ab90667 | 2986 | |
db9f0278 JB |
2987 | if (specpdl_ptr->func != 0) |
2988 | (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
2989 | /* Note that a "binding" of nil is really an unwind protect, | |
719177b3 | 2990 | so in that case the "old value" is a list of forms to evaluate. */ |
265a9e55 | 2991 | else if (NILP (specpdl_ptr->symbol)) |
db9f0278 | 2992 | Fprogn (specpdl_ptr->old_value); |
27a6c729 RS |
2993 | /* If the symbol is a list, it is really |
2994 | (SYMBOL BINDING_BUFFER . CURRENT_BUFFER) | |
2995 | and it indicates we bound a variable that has | |
2996 | buffer-local bindings. */ | |
719177b3 RS |
2997 | else if (CONSP (specpdl_ptr->symbol)) |
2998 | { | |
2999 | Lisp_Object symbol, buffer; | |
3000 | ||
3001 | symbol = XCAR (specpdl_ptr->symbol); | |
27a6c729 | 3002 | buffer = XCAR (XCDR (specpdl_ptr->symbol)); |
719177b3 RS |
3003 | |
3004 | /* Handle restoring a default value. */ | |
3005 | if (NILP (buffer)) | |
3006 | Fset_default (symbol, specpdl_ptr->old_value); | |
3007 | /* Handle restoring a value saved from a live buffer. */ | |
3008 | else | |
3009 | set_internal (symbol, specpdl_ptr->old_value, XBUFFER (buffer), 1); | |
3010 | } | |
db9f0278 | 3011 | else |
9ab90667 GM |
3012 | { |
3013 | /* If variable has a trivial value (no forwarding), we can | |
3014 | just set it. No need to check for constant symbols here, | |
3015 | since that was already done by specbind. */ | |
3016 | if (!MISCP (XSYMBOL (specpdl_ptr->symbol)->value)) | |
3017 | XSYMBOL (specpdl_ptr->symbol)->value = specpdl_ptr->old_value; | |
3018 | else | |
3019 | set_internal (specpdl_ptr->symbol, specpdl_ptr->old_value, 0, 1); | |
3020 | } | |
db9f0278 | 3021 | } |
9ab90667 GM |
3022 | |
3023 | if (NILP (Vquit_flag) && quitf) | |
3024 | Vquit_flag = Qt; | |
db9f0278 JB |
3025 | |
3026 | UNGCPRO; | |
db9f0278 JB |
3027 | return value; |
3028 | } | |
3029 | \f | |
3030 | #if 0 | |
3031 | ||
3032 | /* Get the value of symbol's global binding, even if that binding | |
3033 | is not now dynamically visible. */ | |
3034 | ||
3035 | Lisp_Object | |
3036 | top_level_value (symbol) | |
3037 | Lisp_Object symbol; | |
3038 | { | |
3039 | register struct specbinding *ptr = specpdl; | |
3040 | ||
3041 | CHECK_SYMBOL (symbol, 0); | |
3042 | for (; ptr != specpdl_ptr; ptr++) | |
3043 | { | |
3044 | if (EQ (ptr->symbol, symbol)) | |
3045 | return ptr->old_value; | |
3046 | } | |
3047 | return Fsymbol_value (symbol); | |
3048 | } | |
3049 | ||
3050 | Lisp_Object | |
3051 | top_level_set (symbol, newval) | |
3052 | Lisp_Object symbol, newval; | |
3053 | { | |
3054 | register struct specbinding *ptr = specpdl; | |
3055 | ||
3056 | CHECK_SYMBOL (symbol, 0); | |
3057 | for (; ptr != specpdl_ptr; ptr++) | |
3058 | { | |
3059 | if (EQ (ptr->symbol, symbol)) | |
3060 | { | |
3061 | ptr->old_value = newval; | |
3062 | return newval; | |
3063 | } | |
3064 | } | |
3065 | return Fset (symbol, newval); | |
3066 | } | |
3067 | ||
3068 | #endif /* 0 */ | |
3069 | \f | |
3070 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, | |
3071 | "Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.\n\ | |
3072 | The debugger is entered when that frame exits, if the flag is non-nil.") | |
3073 | (level, flag) | |
3074 | Lisp_Object level, flag; | |
3075 | { | |
3076 | register struct backtrace *backlist = backtrace_list; | |
3077 | register int i; | |
3078 | ||
3079 | CHECK_NUMBER (level, 0); | |
3080 | ||
3081 | for (i = 0; backlist && i < XINT (level); i++) | |
3082 | { | |
3083 | backlist = backlist->next; | |
3084 | } | |
3085 | ||
3086 | if (backlist) | |
265a9e55 | 3087 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
3088 | |
3089 | return flag; | |
3090 | } | |
3091 | ||
3092 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
3093 | "Print a trace of Lisp function calls currently active.\n\ | |
3094 | Output stream used is value of `standard-output'.") | |
3095 | () | |
3096 | { | |
3097 | register struct backtrace *backlist = backtrace_list; | |
3098 | register int i; | |
3099 | Lisp_Object tail; | |
3100 | Lisp_Object tem; | |
3101 | extern Lisp_Object Vprint_level; | |
3102 | struct gcpro gcpro1; | |
3103 | ||
a631e24c | 3104 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
3105 | |
3106 | tail = Qnil; | |
3107 | GCPRO1 (tail); | |
3108 | ||
3109 | while (backlist) | |
3110 | { | |
3111 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
3112 | if (backlist->nargs == UNEVALLED) | |
3113 | { | |
3114 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 3115 | write_string ("\n", -1); |
db9f0278 JB |
3116 | } |
3117 | else | |
3118 | { | |
3119 | tem = *backlist->function; | |
3120 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
3121 | write_string ("(", -1); | |
3122 | if (backlist->nargs == MANY) | |
3123 | { | |
3124 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 3125 | !NILP (tail); |
db9f0278 JB |
3126 | tail = Fcdr (tail), i++) |
3127 | { | |
3128 | if (i) write_string (" ", -1); | |
3129 | Fprin1 (Fcar (tail), Qnil); | |
3130 | } | |
3131 | } | |
3132 | else | |
3133 | { | |
3134 | for (i = 0; i < backlist->nargs; i++) | |
3135 | { | |
3136 | if (i) write_string (" ", -1); | |
3137 | Fprin1 (backlist->args[i], Qnil); | |
3138 | } | |
3139 | } | |
b6703b02 | 3140 | write_string (")\n", -1); |
db9f0278 | 3141 | } |
db9f0278 JB |
3142 | backlist = backlist->next; |
3143 | } | |
3144 | ||
3145 | Vprint_level = Qnil; | |
3146 | UNGCPRO; | |
3147 | return Qnil; | |
3148 | } | |
3149 | ||
17401c97 | 3150 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
79e8bfbf | 3151 | "Return the function and arguments NFRAMES up from current execution point.\n\ |
db9f0278 JB |
3152 | If that frame has not evaluated the arguments yet (or is a special form),\n\ |
3153 | the value is (nil FUNCTION ARG-FORMS...).\n\ | |
3154 | If that frame has evaluated its arguments and called its function already,\n\ | |
3155 | the value is (t FUNCTION ARG-VALUES...).\n\ | |
3156 | A &rest arg is represented as the tail of the list ARG-VALUES.\n\ | |
3157 | FUNCTION is whatever was supplied as car of evaluated list,\n\ | |
3158 | or a lambda expression for macro calls.\n\ | |
79e8bfbf | 3159 | If NFRAMES is more than the number of frames, the value is nil.") |
db9f0278 JB |
3160 | (nframes) |
3161 | Lisp_Object nframes; | |
3162 | { | |
3163 | register struct backtrace *backlist = backtrace_list; | |
3164 | register int i; | |
3165 | Lisp_Object tem; | |
3166 | ||
3167 | CHECK_NATNUM (nframes, 0); | |
3168 | ||
3169 | /* Find the frame requested. */ | |
b6703b02 | 3170 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
3171 | backlist = backlist->next; |
3172 | ||
3173 | if (!backlist) | |
3174 | return Qnil; | |
3175 | if (backlist->nargs == UNEVALLED) | |
3176 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
3177 | else | |
3178 | { | |
3179 | if (backlist->nargs == MANY) | |
3180 | tem = *backlist->args; | |
3181 | else | |
3182 | tem = Flist (backlist->nargs, backlist->args); | |
3183 | ||
3184 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3185 | } | |
3186 | } | |
a2ff3819 | 3187 | |
db9f0278 | 3188 | \f |
dfcf069d | 3189 | void |
db9f0278 JB |
3190 | syms_of_eval () |
3191 | { | |
3192 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
7eaada67 RS |
3193 | "*Limit on number of Lisp variable bindings & unwind-protects.\n\ |
3194 | If Lisp code tries to make more than this many at once,\n\ | |
3195 | an error is signaled."); | |
db9f0278 JB |
3196 | |
3197 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
7eaada67 | 3198 | "*Limit on depth in `eval', `apply' and `funcall' before error.\n\ |
db9f0278 JB |
3199 | This limit is to catch infinite recursions for you before they cause\n\ |
3200 | actual stack overflow in C, which would be fatal for Emacs.\n\ | |
3201 | You can safely make it considerably larger than its default value,\n\ | |
3202 | if that proves inconveniently small."); | |
3203 | ||
3204 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
3205 | "Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.\n\ | |
d0b68896 | 3206 | Typing C-g sets `quit-flag' non-nil, regardless of `inhibit-quit'."); |
db9f0278 JB |
3207 | Vquit_flag = Qnil; |
3208 | ||
3209 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
3210 | "Non-nil inhibits C-g quitting from happening immediately.\n\ | |
3211 | Note that `quit-flag' will still be set by typing C-g,\n\ | |
690337b7 | 3212 | so a quit will be signaled as soon as `inhibit-quit' is nil.\n\ |
db9f0278 JB |
3213 | To prevent this happening, set `quit-flag' to nil\n\ |
3214 | before making `inhibit-quit' nil."); | |
3215 | Vinhibit_quit = Qnil; | |
3216 | ||
ad236261 JB |
3217 | Qinhibit_quit = intern ("inhibit-quit"); |
3218 | staticpro (&Qinhibit_quit); | |
3219 | ||
db9f0278 JB |
3220 | Qautoload = intern ("autoload"); |
3221 | staticpro (&Qautoload); | |
3222 | ||
3223 | Qdebug_on_error = intern ("debug-on-error"); | |
3224 | staticpro (&Qdebug_on_error); | |
3225 | ||
3226 | Qmacro = intern ("macro"); | |
3227 | staticpro (&Qmacro); | |
3228 | ||
3229 | /* Note that the process handling also uses Qexit, but we don't want | |
3230 | to staticpro it twice, so we just do it here. */ | |
3231 | Qexit = intern ("exit"); | |
3232 | staticpro (&Qexit); | |
3233 | ||
3234 | Qinteractive = intern ("interactive"); | |
3235 | staticpro (&Qinteractive); | |
3236 | ||
3237 | Qcommandp = intern ("commandp"); | |
3238 | staticpro (&Qcommandp); | |
3239 | ||
3240 | Qdefun = intern ("defun"); | |
3241 | staticpro (&Qdefun); | |
3242 | ||
3243 | Qand_rest = intern ("&rest"); | |
3244 | staticpro (&Qand_rest); | |
3245 | ||
3246 | Qand_optional = intern ("&optional"); | |
3247 | staticpro (&Qand_optional); | |
3248 | ||
128c0f66 | 3249 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
db9f0278 | 3250 | "*Non-nil means automatically display a backtrace buffer\n\ |
128c0f66 RM |
3251 | after any error that is handled by the editor command loop.\n\ |
3252 | If the value is a list, an error only means to display a backtrace\n\ | |
3253 | if one of its condition symbols appears in the list."); | |
3254 | Vstack_trace_on_error = Qnil; | |
db9f0278 | 3255 | |
128c0f66 | 3256 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
db9f0278 JB |
3257 | "*Non-nil means enter debugger if an error is signaled.\n\ |
3258 | Does not apply to errors handled by `condition-case'.\n\ | |
128c0f66 RM |
3259 | If the value is a list, an error only means to enter the debugger\n\ |
3260 | if one of its condition symbols appears in the list.\n\ | |
db9f0278 | 3261 | See also variable `debug-on-quit'."); |
128c0f66 | 3262 | Vdebug_on_error = Qnil; |
db9f0278 | 3263 | |
fc950e09 KH |
3264 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
3265 | "*List of errors for which the debugger should not be called.\n\ | |
3266 | Each element may be a condition-name or a regexp that matches error messages.\n\ | |
3267 | If any element applies to a given error, that error skips the debugger\n\ | |
3268 | and just returns to top level.\n\ | |
3269 | This overrides the variable `debug-on-error'.\n\ | |
3270 | It does not apply to errors handled by `condition-case'."); | |
3271 | Vdebug_ignored_errors = Qnil; | |
3272 | ||
db9f0278 | 3273 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
d0b68896 | 3274 | "*Non-nil means enter debugger if quit is signaled (C-g, for example).\n\ |
1b7d8239 | 3275 | Does not apply if quit is handled by a `condition-case'."); |
db9f0278 JB |
3276 | debug_on_quit = 0; |
3277 | ||
3278 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
3279 | "Non-nil means enter debugger before next `eval', `apply' or `funcall'."); | |
3280 | ||
556d7314 GM |
3281 | DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue, |
3282 | "Non-nil means debugger may continue execution.\n\ | |
3283 | This is nil when the debugger is called under circumstances where it\n\ | |
3284 | might not be safe to continue."); | |
dac204bc | 3285 | debugger_may_continue = 1; |
556d7314 | 3286 | |
db9f0278 JB |
3287 | DEFVAR_LISP ("debugger", &Vdebugger, |
3288 | "Function to call to invoke debugger.\n\ | |
3289 | If due to frame exit, args are `exit' and the value being returned;\n\ | |
3290 | this function's value will be returned instead of that.\n\ | |
3291 | If due to error, args are `error' and a list of the args to `signal'.\n\ | |
3292 | If due to `apply' or `funcall' entry, one arg, `lambda'.\n\ | |
3293 | If due to `eval' entry, one arg, t."); | |
3294 | Vdebugger = Qnil; | |
3295 | ||
61ede770 RS |
3296 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
3297 | "If non-nil, this is a function for `signal' to call.\n\ | |
3298 | It receives the same arguments that `signal' was given.\n\ | |
3299 | The Edebug package uses this to regain control."); | |
3300 | Vsignal_hook_function = Qnil; | |
3301 | ||
db9f0278 JB |
3302 | Qmocklisp_arguments = intern ("mocklisp-arguments"); |
3303 | staticpro (&Qmocklisp_arguments); | |
3304 | DEFVAR_LISP ("mocklisp-arguments", &Vmocklisp_arguments, | |
3305 | "While in a mocklisp function, the list of its unevaluated args."); | |
3306 | Vmocklisp_arguments = Qt; | |
3307 | ||
57a6e758 | 3308 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
61ede770 RS |
3309 | "*Non-nil means call the debugger regardless of condition handlers.\n\ |
3310 | Note that `debug-on-error', `debug-on-quit' and friends\n\ | |
3311 | still determine whether to handle the particular condition."); | |
57a6e758 | 3312 | Vdebug_on_signal = Qnil; |
61ede770 | 3313 | |
6e6e9f08 RS |
3314 | Vrun_hooks = intern ("run-hooks"); |
3315 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3316 | |
3317 | staticpro (&Vautoload_queue); | |
3318 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3319 | staticpro (&Vsignaling_function); |
3320 | Vsignaling_function = Qnil; | |
db9f0278 JB |
3321 | |
3322 | defsubr (&Sor); | |
3323 | defsubr (&Sand); | |
3324 | defsubr (&Sif); | |
3325 | defsubr (&Scond); | |
3326 | defsubr (&Sprogn); | |
3327 | defsubr (&Sprog1); | |
3328 | defsubr (&Sprog2); | |
3329 | defsubr (&Ssetq); | |
3330 | defsubr (&Squote); | |
3331 | defsubr (&Sfunction); | |
3332 | defsubr (&Sdefun); | |
3333 | defsubr (&Sdefmacro); | |
3334 | defsubr (&Sdefvar); | |
3335 | defsubr (&Sdefconst); | |
3336 | defsubr (&Suser_variable_p); | |
3337 | defsubr (&Slet); | |
3338 | defsubr (&SletX); | |
3339 | defsubr (&Swhile); | |
3340 | defsubr (&Smacroexpand); | |
3341 | defsubr (&Scatch); | |
3342 | defsubr (&Sthrow); | |
3343 | defsubr (&Sunwind_protect); | |
3344 | defsubr (&Scondition_case); | |
3345 | defsubr (&Ssignal); | |
3346 | defsubr (&Sinteractive_p); | |
3347 | defsubr (&Scommandp); | |
3348 | defsubr (&Sautoload); | |
3349 | defsubr (&Seval); | |
3350 | defsubr (&Sapply); | |
3351 | defsubr (&Sfuncall); | |
ff936e53 SM |
3352 | defsubr (&Srun_hooks); |
3353 | defsubr (&Srun_hook_with_args); | |
3354 | defsubr (&Srun_hook_with_args_until_success); | |
3355 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3356 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3357 | defsubr (&Sbacktrace_debug); |
3358 | defsubr (&Sbacktrace); | |
3359 | defsubr (&Sbacktrace_frame); | |
3360 | } |