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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 | ||
1b1acc13 | 137 | /* Non-zero means debugger may continue. This is zero when the |
556d7314 GM |
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 | 153 | /* List of conditions and regexps specifying error messages which |
1b1acc13 | 154 | do not enter the debugger even if Vdebug_on_error 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); | |
8efb6cc7 | 257 | specbind (Qinhibit_redisplay, Qnil); |
9db6f6b4 GM |
258 | |
259 | #if 0 /* Binding this prevents execution of Lisp code during | |
260 | redisplay, which necessarily leads to display problems. */ | |
8efb6cc7 | 261 | specbind (Qinhibit_eval_during_redisplay, Qt); |
9db6f6b4 | 262 | #endif |
3648c842 GM |
263 | |
264 | val = apply1 (Vdebugger, arg); | |
265 | ||
266 | /* Interrupting redisplay and resuming it later is not safe under | |
267 | all circumstances. So, when the debugger returns, abort the | |
1b1acc13 | 268 | interrupted redisplay by going back to the top-level. */ |
3648c842 GM |
269 | if (debug_while_redisplaying) |
270 | Ftop_level (); | |
271 | ||
556d7314 | 272 | return unbind_to (count, val); |
db9f0278 JB |
273 | } |
274 | ||
dfcf069d | 275 | void |
db9f0278 JB |
276 | do_debug_on_call (code) |
277 | Lisp_Object code; | |
278 | { | |
279 | debug_on_next_call = 0; | |
280 | backtrace_list->debug_on_exit = 1; | |
281 | call_debugger (Fcons (code, Qnil)); | |
282 | } | |
283 | \f | |
284 | /* NOTE!!! Every function that can call EVAL must protect its args | |
285 | and temporaries from garbage collection while it needs them. | |
286 | The definition of `For' shows what you have to do. */ | |
287 | ||
288 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
289 | doc: /* Eval args until one of them yields non-nil, then return that value. |
290 | The remaining args are not evalled at all. | |
291 | If all args return nil, return nil. | |
292 | usage: (or CONDITIONS ...) */) | |
293 | (args) | |
db9f0278 JB |
294 | Lisp_Object args; |
295 | { | |
296 | register Lisp_Object val; | |
297 | Lisp_Object args_left; | |
298 | struct gcpro gcpro1; | |
299 | ||
265a9e55 | 300 | if (NILP(args)) |
db9f0278 JB |
301 | return Qnil; |
302 | ||
303 | args_left = args; | |
304 | GCPRO1 (args_left); | |
305 | ||
306 | do | |
307 | { | |
308 | val = Feval (Fcar (args_left)); | |
265a9e55 | 309 | if (!NILP (val)) |
db9f0278 JB |
310 | break; |
311 | args_left = Fcdr (args_left); | |
312 | } | |
265a9e55 | 313 | while (!NILP(args_left)); |
db9f0278 JB |
314 | |
315 | UNGCPRO; | |
316 | return val; | |
317 | } | |
318 | ||
319 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
320 | doc: /* Eval args until one of them yields nil, then return nil. |
321 | The remaining args are not evalled at all. | |
322 | If no arg yields nil, return the last arg's value. | |
323 | usage: (and CONDITIONS ...) */) | |
324 | (args) | |
db9f0278 JB |
325 | Lisp_Object args; |
326 | { | |
327 | register Lisp_Object val; | |
328 | Lisp_Object args_left; | |
329 | struct gcpro gcpro1; | |
330 | ||
265a9e55 | 331 | if (NILP(args)) |
db9f0278 JB |
332 | return Qt; |
333 | ||
334 | args_left = args; | |
335 | GCPRO1 (args_left); | |
336 | ||
337 | do | |
338 | { | |
339 | val = Feval (Fcar (args_left)); | |
265a9e55 | 340 | if (NILP (val)) |
db9f0278 JB |
341 | break; |
342 | args_left = Fcdr (args_left); | |
343 | } | |
265a9e55 | 344 | while (!NILP(args_left)); |
db9f0278 JB |
345 | |
346 | UNGCPRO; | |
347 | return val; | |
348 | } | |
349 | ||
350 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
351 | doc: /* If COND yields non-nil, do THEN, else do ELSE... |
352 | Returns the value of THEN or the value of the last of the ELSE's. | |
353 | THEN must be one expression, but ELSE... can be zero or more expressions. | |
354 | If COND yields nil, and there are no ELSE's, the value is nil. | |
355 | usage: (if COND THEN ELSE...) */) | |
356 | (args) | |
db9f0278 JB |
357 | Lisp_Object args; |
358 | { | |
359 | register Lisp_Object cond; | |
360 | struct gcpro gcpro1; | |
361 | ||
362 | GCPRO1 (args); | |
363 | cond = Feval (Fcar (args)); | |
364 | UNGCPRO; | |
365 | ||
265a9e55 | 366 | if (!NILP (cond)) |
db9f0278 JB |
367 | return Feval (Fcar (Fcdr (args))); |
368 | return Fprogn (Fcdr (Fcdr (args))); | |
369 | } | |
370 | ||
371 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
372 | doc: /* Try each clause until one succeeds. |
373 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated | |
374 | and, if the value is non-nil, this clause succeeds: | |
375 | then the expressions in BODY are evaluated and the last one's | |
376 | value is the value of the cond-form. | |
377 | If no clause succeeds, cond returns nil. | |
378 | If a clause has one element, as in (CONDITION), | |
379 | CONDITION's value if non-nil is returned from the cond-form. | |
380 | usage: (cond CLAUSES...) */) | |
381 | (args) | |
db9f0278 JB |
382 | Lisp_Object args; |
383 | { | |
384 | register Lisp_Object clause, val; | |
385 | struct gcpro gcpro1; | |
386 | ||
387 | val = Qnil; | |
388 | GCPRO1 (args); | |
265a9e55 | 389 | while (!NILP (args)) |
db9f0278 JB |
390 | { |
391 | clause = Fcar (args); | |
392 | val = Feval (Fcar (clause)); | |
265a9e55 | 393 | if (!NILP (val)) |
db9f0278 | 394 | { |
03699b14 KR |
395 | if (!EQ (XCDR (clause), Qnil)) |
396 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
397 | break; |
398 | } | |
03699b14 | 399 | args = XCDR (args); |
db9f0278 JB |
400 | } |
401 | UNGCPRO; | |
402 | ||
403 | return val; | |
404 | } | |
405 | ||
406 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
407 | doc: /* Eval BODY forms sequentially and return value of last one. |
408 | usage: (progn BODY ...) */) | |
409 | (args) | |
db9f0278 JB |
410 | Lisp_Object args; |
411 | { | |
412 | register Lisp_Object val, tem; | |
413 | Lisp_Object args_left; | |
414 | struct gcpro gcpro1; | |
415 | ||
416 | /* In Mocklisp code, symbols at the front of the progn arglist | |
417 | are to be bound to zero. */ | |
418 | if (!EQ (Vmocklisp_arguments, Qt)) | |
419 | { | |
420 | val = make_number (0); | |
90165123 | 421 | while (!NILP (args) && (tem = Fcar (args), SYMBOLP (tem))) |
db9f0278 JB |
422 | { |
423 | QUIT; | |
424 | specbind (tem, val), args = Fcdr (args); | |
425 | } | |
426 | } | |
427 | ||
265a9e55 | 428 | if (NILP(args)) |
db9f0278 JB |
429 | return Qnil; |
430 | ||
431 | args_left = args; | |
432 | GCPRO1 (args_left); | |
433 | ||
434 | do | |
435 | { | |
436 | val = Feval (Fcar (args_left)); | |
437 | args_left = Fcdr (args_left); | |
438 | } | |
265a9e55 | 439 | while (!NILP(args_left)); |
db9f0278 JB |
440 | |
441 | UNGCPRO; | |
442 | return val; | |
443 | } | |
444 | ||
445 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
446 | doc: /* Eval FIRST and BODY sequentially; value from FIRST. |
447 | The value of FIRST is saved during the evaluation of the remaining args, | |
448 | whose values are discarded. | |
449 | usage: (prog1 FIRST BODY...) */) | |
450 | (args) | |
db9f0278 JB |
451 | Lisp_Object args; |
452 | { | |
453 | Lisp_Object val; | |
454 | register Lisp_Object args_left; | |
455 | struct gcpro gcpro1, gcpro2; | |
456 | register int argnum = 0; | |
457 | ||
265a9e55 | 458 | if (NILP(args)) |
db9f0278 JB |
459 | return Qnil; |
460 | ||
461 | args_left = args; | |
462 | val = Qnil; | |
463 | GCPRO2 (args, val); | |
464 | ||
465 | do | |
466 | { | |
467 | if (!(argnum++)) | |
468 | val = Feval (Fcar (args_left)); | |
469 | else | |
470 | Feval (Fcar (args_left)); | |
471 | args_left = Fcdr (args_left); | |
472 | } | |
265a9e55 | 473 | while (!NILP(args_left)); |
db9f0278 JB |
474 | |
475 | UNGCPRO; | |
476 | return val; | |
477 | } | |
478 | ||
479 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
480 | doc: /* Eval X, Y and BODY sequentially; value from Y. |
481 | The value of Y is saved during the evaluation of the remaining args, | |
482 | whose values are discarded. | |
483 | usage: (prog2 X Y BODY...) */) | |
484 | (args) | |
db9f0278 JB |
485 | Lisp_Object args; |
486 | { | |
487 | Lisp_Object val; | |
488 | register Lisp_Object args_left; | |
489 | struct gcpro gcpro1, gcpro2; | |
490 | register int argnum = -1; | |
491 | ||
492 | val = Qnil; | |
493 | ||
87d238ba | 494 | if (NILP (args)) |
db9f0278 JB |
495 | return Qnil; |
496 | ||
497 | args_left = args; | |
498 | val = Qnil; | |
499 | GCPRO2 (args, val); | |
500 | ||
501 | do | |
502 | { | |
503 | if (!(argnum++)) | |
504 | val = Feval (Fcar (args_left)); | |
505 | else | |
506 | Feval (Fcar (args_left)); | |
507 | args_left = Fcdr (args_left); | |
508 | } | |
87d238ba | 509 | while (!NILP (args_left)); |
db9f0278 JB |
510 | |
511 | UNGCPRO; | |
512 | return val; | |
513 | } | |
514 | ||
515 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
516 | doc: /* Set each SYM to the value of its VAL. |
517 | The symbols SYM are variables; they are literal (not evaluated). | |
518 | The values VAL are expressions; they are evaluated. | |
519 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
520 | The second VAL is not computed until after the first SYM is set, and so on; | |
521 | each VAL can use the new value of variables set earlier in the `setq'. | |
522 | The return value of the `setq' form is the value of the last VAL. | |
523 | usage: (setq SYM VAL SYM VAL ...) */) | |
524 | (args) | |
db9f0278 JB |
525 | Lisp_Object args; |
526 | { | |
527 | register Lisp_Object args_left; | |
528 | register Lisp_Object val, sym; | |
529 | struct gcpro gcpro1; | |
530 | ||
265a9e55 | 531 | if (NILP(args)) |
db9f0278 JB |
532 | return Qnil; |
533 | ||
534 | args_left = args; | |
535 | GCPRO1 (args); | |
536 | ||
537 | do | |
538 | { | |
539 | val = Feval (Fcar (Fcdr (args_left))); | |
540 | sym = Fcar (args_left); | |
541 | Fset (sym, val); | |
542 | args_left = Fcdr (Fcdr (args_left)); | |
543 | } | |
265a9e55 | 544 | while (!NILP(args_left)); |
db9f0278 JB |
545 | |
546 | UNGCPRO; | |
547 | return val; | |
548 | } | |
549 | ||
550 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
551 | doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'. |
552 | usage: (quote ARG) */) | |
553 | (args) | |
db9f0278 JB |
554 | Lisp_Object args; |
555 | { | |
556 | return Fcar (args); | |
557 | } | |
558 | ||
559 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
560 | doc: /* Like `quote', but preferred for objects which are functions. |
561 | In byte compilation, `function' causes its argument to be compiled. | |
562 | `quote' cannot do that. | |
563 | usage: (function ARG) */) | |
564 | (args) | |
db9f0278 JB |
565 | Lisp_Object args; |
566 | { | |
567 | return Fcar (args); | |
568 | } | |
569 | ||
e0f331ab | 570 | |
db9f0278 | 571 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, |
9dbc9081 PJ |
572 | doc: /* Return t if function in which this appears was called interactively. |
573 | This means that the function was called with call-interactively (which | |
574 | includes being called as the binding of a key) | |
575 | and input is currently coming from the keyboard (not in keyboard macro). */) | |
576 | () | |
db9f0278 | 577 | { |
e0f331ab GM |
578 | return interactive_p (1) ? Qt : Qnil; |
579 | } | |
580 | ||
581 | ||
582 | /* Return 1 if function in which this appears was called | |
583 | interactively. This means that the function was called with | |
584 | call-interactively (which includes being called as the binding of | |
585 | a key) and input is currently coming from the keyboard (not in | |
586 | keyboard macro). | |
587 | ||
588 | EXCLUDE_SUBRS_P non-zero means always return 0 if the function | |
589 | called is a built-in. */ | |
590 | ||
591 | int | |
592 | interactive_p (exclude_subrs_p) | |
593 | int exclude_subrs_p; | |
594 | { | |
595 | struct backtrace *btp; | |
596 | Lisp_Object fun; | |
db9f0278 JB |
597 | |
598 | if (!INTERACTIVE) | |
e0f331ab | 599 | return 0; |
db9f0278 | 600 | |
db9f0278 | 601 | btp = backtrace_list; |
daa37602 JB |
602 | |
603 | /* If this isn't a byte-compiled function, there may be a frame at | |
e0f331ab | 604 | the top for Finteractive_p. If so, skip it. */ |
daa37602 | 605 | fun = Findirect_function (*btp->function); |
0598f773 | 606 | if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) |
db9f0278 | 607 | btp = btp->next; |
daa37602 JB |
608 | |
609 | /* If we're running an Emacs 18-style byte-compiled function, there | |
610 | may be a frame for Fbytecode. Now, given the strictest | |
611 | definition, this function isn't really being called | |
612 | interactively, but because that's the way Emacs 18 always builds | |
613 | byte-compiled functions, we'll accept it for now. */ | |
614 | if (EQ (*btp->function, Qbytecode)) | |
615 | btp = btp->next; | |
616 | ||
617 | /* If this isn't a byte-compiled function, then we may now be | |
618 | looking at several frames for special forms. Skip past them. */ | |
619 | while (btp && | |
620 | btp->nargs == UNEVALLED) | |
a6e3fa71 JB |
621 | btp = btp->next; |
622 | ||
daa37602 JB |
623 | /* btp now points at the frame of the innermost function that isn't |
624 | a special form, ignoring frames for Finteractive_p and/or | |
625 | Fbytecode at the top. If this frame is for a built-in function | |
626 | (such as load or eval-region) return nil. */ | |
ffd56f97 | 627 | fun = Findirect_function (*btp->function); |
e0f331ab GM |
628 | if (exclude_subrs_p && SUBRP (fun)) |
629 | return 0; | |
630 | ||
db9f0278 JB |
631 | /* btp points to the frame of a Lisp function that called interactive-p. |
632 | Return t if that function was called interactively. */ | |
633 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
e0f331ab GM |
634 | return 1; |
635 | return 0; | |
db9f0278 JB |
636 | } |
637 | ||
e0f331ab | 638 | |
db9f0278 | 639 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, |
9dbc9081 PJ |
640 | doc: /* Define NAME as a function. |
641 | The definition is (lambda ARGLIST [DOCSTRING] BODY...). | |
642 | See also the function `interactive'. | |
643 | usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */) | |
644 | (args) | |
db9f0278 JB |
645 | Lisp_Object args; |
646 | { | |
647 | register Lisp_Object fn_name; | |
648 | register Lisp_Object defn; | |
649 | ||
650 | fn_name = Fcar (args); | |
651 | defn = Fcons (Qlambda, Fcdr (args)); | |
265a9e55 | 652 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
653 | defn = Fpurecopy (defn); |
654 | Ffset (fn_name, defn); | |
2a49b6e5 | 655 | LOADHIST_ATTACH (fn_name); |
db9f0278 JB |
656 | return fn_name; |
657 | } | |
658 | ||
659 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
660 | doc: /* Define NAME as a macro. |
661 | The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). | |
662 | When the macro is called, as in (NAME ARGS...), | |
663 | the function (lambda ARGLIST BODY...) is applied to | |
664 | the list ARGS... as it appears in the expression, | |
665 | and the result should be a form to be evaluated instead of the original. | |
666 | usage: (defmacro NAME ARGLIST [DOCSTRING] BODY...) */) | |
667 | (args) | |
db9f0278 JB |
668 | Lisp_Object args; |
669 | { | |
670 | register Lisp_Object fn_name; | |
671 | register Lisp_Object defn; | |
672 | ||
673 | fn_name = Fcar (args); | |
674 | defn = Fcons (Qmacro, Fcons (Qlambda, Fcdr (args))); | |
265a9e55 | 675 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
676 | defn = Fpurecopy (defn); |
677 | Ffset (fn_name, defn); | |
2a49b6e5 | 678 | LOADHIST_ATTACH (fn_name); |
db9f0278 JB |
679 | return fn_name; |
680 | } | |
681 | ||
19cebf5a GM |
682 | |
683 | DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 2, 0, | |
9dbc9081 PJ |
684 | doc: /* Make SYMBOL a variable alias for symbol ALIASED. |
685 | Setting the value of SYMBOL will subsequently set the value of ALIASED, | |
686 | and getting the value of SYMBOL will return the value ALIASED has. | |
687 | ALIASED nil means remove the alias; SYMBOL is unbound after that. */) | |
688 | (symbol, aliased) | |
19cebf5a GM |
689 | Lisp_Object symbol, aliased; |
690 | { | |
691 | struct Lisp_Symbol *sym; | |
692 | ||
b7826503 PJ |
693 | CHECK_SYMBOL (symbol); |
694 | CHECK_SYMBOL (aliased); | |
19cebf5a GM |
695 | |
696 | if (SYMBOL_CONSTANT_P (symbol)) | |
697 | error ("Cannot make a constant an alias"); | |
698 | ||
699 | sym = XSYMBOL (symbol); | |
700 | sym->indirect_variable = 1; | |
701 | sym->value = aliased; | |
702 | sym->constant = SYMBOL_CONSTANT_P (aliased); | |
703 | LOADHIST_ATTACH (symbol); | |
704 | ||
705 | return aliased; | |
706 | } | |
707 | ||
708 | ||
db9f0278 | 709 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, |
9dbc9081 PJ |
710 | doc: /* Define SYMBOL as a variable. |
711 | You are not required to define a variable in order to use it, | |
712 | but the definition can supply documentation and an initial value | |
713 | in a way that tags can recognize. | |
714 | ||
715 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void. | |
716 | If SYMBOL is buffer-local, its default value is what is set; | |
717 | buffer-local values are not affected. | |
718 | INITVALUE and DOCSTRING are optional. | |
719 | If DOCSTRING starts with *, this variable is identified as a user option. | |
720 | This means that M-x set-variable recognizes it. | |
721 | See also `user-variable-p'. | |
722 | If INITVALUE is missing, SYMBOL's value is not set. | |
723 | usage: (defvar SYMBOL [INITVALUE DOCSTRING]) */) | |
724 | (args) | |
db9f0278 JB |
725 | Lisp_Object args; |
726 | { | |
a42ba017 | 727 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
728 | |
729 | sym = Fcar (args); | |
a42ba017 RS |
730 | tail = Fcdr (args); |
731 | if (!NILP (Fcdr (Fcdr (tail)))) | |
732 | error ("too many arguments"); | |
733 | ||
33568849 | 734 | tem = Fdefault_boundp (sym); |
a42ba017 | 735 | if (!NILP (tail)) |
db9f0278 | 736 | { |
265a9e55 | 737 | if (NILP (tem)) |
33568849 SM |
738 | Fset_default (sym, Feval (Fcar (tail))); |
739 | tail = Fcdr (tail); | |
740 | if (!NILP (Fcar (tail))) | |
741 | { | |
742 | tem = Fcar (tail); | |
743 | if (!NILP (Vpurify_flag)) | |
744 | tem = Fpurecopy (tem); | |
745 | Fput (sym, Qvariable_documentation, tem); | |
746 | } | |
747 | LOADHIST_ATTACH (sym); | |
db9f0278 | 748 | } |
33568849 SM |
749 | else |
750 | /* A (defvar <var>) should not take precedence in the load-history over | |
751 | an earlier (defvar <var> <val>), so only add to history if the default | |
752 | value is still unbound. */ | |
753 | if (NILP (tem)) | |
754 | LOADHIST_ATTACH (sym); | |
755 | ||
db9f0278 JB |
756 | return sym; |
757 | } | |
758 | ||
759 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
760 | doc: /* Define SYMBOL as a constant variable. |
761 | The intent is that neither programs nor users should ever change this value. | |
762 | Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
763 | If SYMBOL is buffer-local, its default value is what is set; | |
764 | buffer-local values are not affected. | |
765 | DOCSTRING is optional. | |
766 | usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */) | |
767 | (args) | |
db9f0278 JB |
768 | Lisp_Object args; |
769 | { | |
770 | register Lisp_Object sym, tem; | |
771 | ||
772 | sym = Fcar (args); | |
a42ba017 RS |
773 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
774 | error ("too many arguments"); | |
775 | ||
1182a7cb DL |
776 | tem = Feval (Fcar (Fcdr (args))); |
777 | if (!NILP (Vpurify_flag)) | |
778 | tem = Fpurecopy (tem); | |
779 | Fset_default (sym, tem); | |
db9f0278 | 780 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 781 | if (!NILP (tem)) |
db9f0278 | 782 | { |
265a9e55 | 783 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
784 | tem = Fpurecopy (tem); |
785 | Fput (sym, Qvariable_documentation, tem); | |
786 | } | |
2a49b6e5 | 787 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
788 | return sym; |
789 | } | |
790 | ||
791 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, | |
9dbc9081 PJ |
792 | doc: /* Returns t if VARIABLE is intended to be set and modified by users. |
793 | \(The alternative is a variable used internally in a Lisp program.) | |
794 | Determined by whether the first character of the documentation | |
795 | for the variable is `*' or if the variable is customizable (has a non-nil | |
796 | value of any of `custom-type', `custom-loads' or `standard-value' | |
797 | on its property list). */) | |
798 | (variable) | |
db9f0278 JB |
799 | Lisp_Object variable; |
800 | { | |
801 | Lisp_Object documentation; | |
802 | ||
5e78e475 RS |
803 | if (!SYMBOLP (variable)) |
804 | return Qnil; | |
805 | ||
db9f0278 | 806 | documentation = Fget (variable, Qvariable_documentation); |
90165123 | 807 | if (INTEGERP (documentation) && XINT (documentation) < 0) |
db9f0278 | 808 | return Qt; |
65411977 RS |
809 | if (STRINGP (documentation) |
810 | && ((unsigned char) XSTRING (documentation)->data[0] == '*')) | |
811 | return Qt; | |
812 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
813 | if (CONSP (documentation) | |
03699b14 KR |
814 | && STRINGP (XCAR (documentation)) |
815 | && INTEGERP (XCDR (documentation)) | |
816 | && XINT (XCDR (documentation)) < 0) | |
db9f0278 | 817 | return Qt; |
caff32a7 DL |
818 | /* Customizable? */ |
819 | if ((!NILP (Fget (variable, intern ("custom-type")))) | |
820 | || (!NILP (Fget (variable, intern ("custom-loads")))) | |
821 | || (!NILP (Fget (variable, intern ("standard-value"))))) | |
822 | return Qt; | |
db9f0278 JB |
823 | return Qnil; |
824 | } | |
825 | \f | |
826 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
827 | doc: /* Bind variables according to VARLIST then eval BODY. |
828 | The value of the last form in BODY is returned. | |
829 | Each element of VARLIST is a symbol (which is bound to nil) | |
830 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
831 | Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
832 | usage: (let* VARLIST BODY...) */) | |
833 | (args) | |
db9f0278 JB |
834 | Lisp_Object args; |
835 | { | |
836 | Lisp_Object varlist, val, elt; | |
837 | int count = specpdl_ptr - specpdl; | |
838 | struct gcpro gcpro1, gcpro2, gcpro3; | |
839 | ||
840 | GCPRO3 (args, elt, varlist); | |
841 | ||
842 | varlist = Fcar (args); | |
265a9e55 | 843 | while (!NILP (varlist)) |
db9f0278 JB |
844 | { |
845 | QUIT; | |
846 | elt = Fcar (varlist); | |
90165123 | 847 | if (SYMBOLP (elt)) |
db9f0278 | 848 | specbind (elt, Qnil); |
08564963 JB |
849 | else if (! NILP (Fcdr (Fcdr (elt)))) |
850 | Fsignal (Qerror, | |
851 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
852 | elt)); | |
db9f0278 JB |
853 | else |
854 | { | |
855 | val = Feval (Fcar (Fcdr (elt))); | |
856 | specbind (Fcar (elt), val); | |
857 | } | |
858 | varlist = Fcdr (varlist); | |
859 | } | |
860 | UNGCPRO; | |
861 | val = Fprogn (Fcdr (args)); | |
862 | return unbind_to (count, val); | |
863 | } | |
864 | ||
865 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
866 | doc: /* Bind variables according to VARLIST then eval BODY. |
867 | The value of the last form in BODY is returned. | |
868 | Each element of VARLIST is a symbol (which is bound to nil) | |
869 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
870 | All the VALUEFORMs are evalled before any symbols are bound. | |
871 | usage: (let VARLIST BODY...) */) | |
872 | (args) | |
db9f0278 JB |
873 | Lisp_Object args; |
874 | { | |
875 | Lisp_Object *temps, tem; | |
876 | register Lisp_Object elt, varlist; | |
877 | int count = specpdl_ptr - specpdl; | |
878 | register int argnum; | |
879 | struct gcpro gcpro1, gcpro2; | |
880 | ||
881 | varlist = Fcar (args); | |
882 | ||
883 | /* Make space to hold the values to give the bound variables */ | |
884 | elt = Flength (varlist); | |
885 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
886 | ||
887 | /* Compute the values and store them in `temps' */ | |
888 | ||
889 | GCPRO2 (args, *temps); | |
890 | gcpro2.nvars = 0; | |
891 | ||
265a9e55 | 892 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
893 | { |
894 | QUIT; | |
895 | elt = Fcar (varlist); | |
90165123 | 896 | if (SYMBOLP (elt)) |
db9f0278 | 897 | temps [argnum++] = Qnil; |
08564963 JB |
898 | else if (! NILP (Fcdr (Fcdr (elt)))) |
899 | Fsignal (Qerror, | |
900 | Fcons (build_string ("`let' bindings can have only one value-form"), | |
901 | elt)); | |
db9f0278 JB |
902 | else |
903 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
904 | gcpro2.nvars = argnum; | |
905 | } | |
906 | UNGCPRO; | |
907 | ||
908 | varlist = Fcar (args); | |
265a9e55 | 909 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
910 | { |
911 | elt = Fcar (varlist); | |
912 | tem = temps[argnum++]; | |
90165123 | 913 | if (SYMBOLP (elt)) |
db9f0278 JB |
914 | specbind (elt, tem); |
915 | else | |
916 | specbind (Fcar (elt), tem); | |
917 | } | |
918 | ||
919 | elt = Fprogn (Fcdr (args)); | |
920 | return unbind_to (count, elt); | |
921 | } | |
922 | ||
923 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
924 | doc: /* If TEST yields non-nil, eval BODY... and repeat. |
925 | The order of execution is thus TEST, BODY, TEST, BODY and so on | |
926 | until TEST returns nil. | |
927 | usage: (while TEST BODY...) */) | |
928 | (args) | |
db9f0278 JB |
929 | Lisp_Object args; |
930 | { | |
931 | Lisp_Object test, body, tem; | |
932 | struct gcpro gcpro1, gcpro2; | |
933 | ||
934 | GCPRO2 (test, body); | |
935 | ||
936 | test = Fcar (args); | |
937 | body = Fcdr (args); | |
e3c24a74 RS |
938 | while (tem = Feval (test), |
939 | (!EQ (Vmocklisp_arguments, Qt) ? XINT (tem) : !NILP (tem))) | |
db9f0278 JB |
940 | { |
941 | QUIT; | |
942 | Fprogn (body); | |
943 | } | |
944 | ||
945 | UNGCPRO; | |
946 | return Qnil; | |
947 | } | |
948 | ||
949 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
9dbc9081 PJ |
950 | doc: /* Return result of expanding macros at top level of FORM. |
951 | If FORM is not a macro call, it is returned unchanged. | |
952 | Otherwise, the macro is expanded and the expansion is considered | |
953 | in place of FORM. When a non-macro-call results, it is returned. | |
954 | ||
955 | The second optional arg ENVIRONMENT specifies an environment of macro | |
956 | definitions to shadow the loaded ones for use in file byte-compilation. */) | |
957 | (form, environment) | |
2e267a2e | 958 | Lisp_Object form; |
79e8bfbf | 959 | Lisp_Object environment; |
db9f0278 | 960 | { |
23d6b5a6 | 961 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
962 | register Lisp_Object expander, sym, def, tem; |
963 | ||
964 | while (1) | |
965 | { | |
966 | /* Come back here each time we expand a macro call, | |
967 | in case it expands into another macro call. */ | |
90165123 | 968 | if (!CONSP (form)) |
db9f0278 | 969 | break; |
23d6b5a6 | 970 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 971 | def = sym = XCAR (form); |
23d6b5a6 | 972 | tem = Qnil; |
db9f0278 JB |
973 | /* Trace symbols aliases to other symbols |
974 | until we get a symbol that is not an alias. */ | |
90165123 | 975 | while (SYMBOLP (def)) |
db9f0278 JB |
976 | { |
977 | QUIT; | |
23d6b5a6 | 978 | sym = def; |
79e8bfbf | 979 | tem = Fassq (sym, environment); |
265a9e55 | 980 | if (NILP (tem)) |
db9f0278 JB |
981 | { |
982 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
983 | if (!EQ (def, Qunbound)) |
984 | continue; | |
db9f0278 | 985 | } |
23d6b5a6 | 986 | break; |
db9f0278 | 987 | } |
79e8bfbf | 988 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 989 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 990 | if (NILP (tem)) |
db9f0278 | 991 | { |
79e8bfbf | 992 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 993 | Look at its function definition. */ |
90165123 | 994 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
995 | /* Not defined or definition not suitable */ |
996 | break; | |
03699b14 | 997 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
998 | { |
999 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 1000 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 1001 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
1002 | /* Yes, load it and try again. */ |
1003 | { | |
ca20916b RS |
1004 | struct gcpro gcpro1; |
1005 | GCPRO1 (form); | |
ee9ee63c | 1006 | do_autoload (def, sym); |
ca20916b | 1007 | UNGCPRO; |
ee9ee63c JB |
1008 | continue; |
1009 | } | |
1010 | else | |
db9f0278 | 1011 | break; |
db9f0278 | 1012 | } |
03699b14 | 1013 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 1014 | break; |
03699b14 | 1015 | else expander = XCDR (def); |
db9f0278 JB |
1016 | } |
1017 | else | |
1018 | { | |
03699b14 | 1019 | expander = XCDR (tem); |
265a9e55 | 1020 | if (NILP (expander)) |
db9f0278 JB |
1021 | break; |
1022 | } | |
03699b14 | 1023 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
1024 | } |
1025 | return form; | |
1026 | } | |
1027 | \f | |
1028 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1029 | doc: /* Eval BODY allowing nonlocal exits using `throw'. |
1030 | TAG is evalled to get the tag to use; it must not be nil. | |
1031 | ||
1032 | Then the BODY is executed. | |
1033 | Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'. | |
1034 | If no throw happens, `catch' returns the value of the last BODY form. | |
1035 | If a throw happens, it specifies the value to return from `catch'. | |
1036 | usage: (catch TAG BODY...) */) | |
1037 | (args) | |
db9f0278 JB |
1038 | Lisp_Object args; |
1039 | { | |
1040 | register Lisp_Object tag; | |
1041 | struct gcpro gcpro1; | |
1042 | ||
1043 | GCPRO1 (args); | |
1044 | tag = Feval (Fcar (args)); | |
1045 | UNGCPRO; | |
1046 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
1047 | } | |
1048 | ||
1049 | /* Set up a catch, then call C function FUNC on argument ARG. | |
1050 | FUNC should return a Lisp_Object. | |
1051 | This is how catches are done from within C code. */ | |
1052 | ||
1053 | Lisp_Object | |
1054 | internal_catch (tag, func, arg) | |
1055 | Lisp_Object tag; | |
1056 | Lisp_Object (*func) (); | |
1057 | Lisp_Object arg; | |
1058 | { | |
1059 | /* This structure is made part of the chain `catchlist'. */ | |
1060 | struct catchtag c; | |
1061 | ||
1062 | /* Fill in the components of c, and put it on the list. */ | |
1063 | c.next = catchlist; | |
1064 | c.tag = tag; | |
1065 | c.val = Qnil; | |
1066 | c.backlist = backtrace_list; | |
1067 | c.handlerlist = handlerlist; | |
1068 | c.lisp_eval_depth = lisp_eval_depth; | |
1069 | c.pdlcount = specpdl_ptr - specpdl; | |
1070 | c.poll_suppress_count = poll_suppress_count; | |
1071 | c.gcpro = gcprolist; | |
bcf28080 | 1072 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1073 | catchlist = &c; |
1074 | ||
1075 | /* Call FUNC. */ | |
1076 | if (! _setjmp (c.jmp)) | |
1077 | c.val = (*func) (arg); | |
1078 | ||
1079 | /* Throw works by a longjmp that comes right here. */ | |
1080 | catchlist = c.next; | |
1081 | return c.val; | |
1082 | } | |
1083 | ||
ba410f40 JB |
1084 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1085 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1086 | |
ba410f40 JB |
1087 | This is the guts Fthrow and Fsignal; they differ only in the way |
1088 | they choose the catch tag to throw to. A catch tag for a | |
1089 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1090 | |
ba410f40 JB |
1091 | Before each catch is discarded, unbind all special bindings and |
1092 | execute all unwind-protect clauses made above that catch. Unwind | |
1093 | the handler stack as we go, so that the proper handlers are in | |
1094 | effect for each unwind-protect clause we run. At the end, restore | |
1095 | some static info saved in CATCH, and longjmp to the location | |
1096 | specified in the | |
1097 | ||
1098 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
1099 | |
1100 | static void | |
ba410f40 | 1101 | unwind_to_catch (catch, value) |
db9f0278 | 1102 | struct catchtag *catch; |
ba410f40 | 1103 | Lisp_Object value; |
db9f0278 JB |
1104 | { |
1105 | register int last_time; | |
1106 | ||
ba410f40 JB |
1107 | /* Save the value in the tag. */ |
1108 | catch->val = value; | |
1109 | ||
82da7701 | 1110 | /* Restore the polling-suppression count. */ |
1cdc3155 | 1111 | set_poll_suppress_count (catch->poll_suppress_count); |
82da7701 | 1112 | |
db9f0278 JB |
1113 | do |
1114 | { | |
1115 | last_time = catchlist == catch; | |
82da7701 JB |
1116 | |
1117 | /* Unwind the specpdl stack, and then restore the proper set of | |
1118 | handlers. */ | |
db9f0278 JB |
1119 | unbind_to (catchlist->pdlcount, Qnil); |
1120 | handlerlist = catchlist->handlerlist; | |
1121 | catchlist = catchlist->next; | |
1122 | } | |
1123 | while (! last_time); | |
1124 | ||
bcf28080 | 1125 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1126 | gcprolist = catch->gcpro; |
15934ffa RS |
1127 | #ifdef DEBUG_GCPRO |
1128 | if (gcprolist != 0) | |
1129 | gcpro_level = gcprolist->level + 1; | |
1130 | else | |
1131 | gcpro_level = 0; | |
1132 | #endif | |
db9f0278 JB |
1133 | backtrace_list = catch->backlist; |
1134 | lisp_eval_depth = catch->lisp_eval_depth; | |
ba410f40 JB |
1135 | |
1136 | _longjmp (catch->jmp, 1); | |
db9f0278 JB |
1137 | } |
1138 | ||
1139 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
9dbc9081 PJ |
1140 | doc: /* Throw to the catch for TAG and return VALUE from it. |
1141 | Both TAG and VALUE are evalled. */) | |
1142 | (tag, value) | |
79e8bfbf | 1143 | register Lisp_Object tag, value; |
db9f0278 JB |
1144 | { |
1145 | register struct catchtag *c; | |
1146 | ||
1147 | while (1) | |
1148 | { | |
265a9e55 | 1149 | if (!NILP (tag)) |
db9f0278 JB |
1150 | for (c = catchlist; c; c = c->next) |
1151 | { | |
1152 | if (EQ (c->tag, tag)) | |
79e8bfbf | 1153 | unwind_to_catch (c, value); |
db9f0278 | 1154 | } |
79e8bfbf | 1155 | tag = Fsignal (Qno_catch, Fcons (tag, Fcons (value, Qnil))); |
db9f0278 JB |
1156 | } |
1157 | } | |
1158 | ||
1159 | ||
1160 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1161 | doc: /* Do BODYFORM, protecting with UNWINDFORMS. |
1162 | If BODYFORM completes normally, its value is returned | |
1163 | after executing the UNWINDFORMS. | |
1164 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
1165 | usage: (unwind-protect BODYFORM UNWINDFORMS...) */) | |
1166 | (args) | |
db9f0278 JB |
1167 | Lisp_Object args; |
1168 | { | |
1169 | Lisp_Object val; | |
1170 | int count = specpdl_ptr - specpdl; | |
1171 | ||
1172 | record_unwind_protect (0, Fcdr (args)); | |
1173 | val = Feval (Fcar (args)); | |
1174 | return unbind_to (count, val); | |
1175 | } | |
1176 | \f | |
1177 | /* Chain of condition handlers currently in effect. | |
1178 | The elements of this chain are contained in the stack frames | |
1179 | of Fcondition_case and internal_condition_case. | |
1180 | When an error is signaled (by calling Fsignal, below), | |
1181 | this chain is searched for an element that applies. */ | |
1182 | ||
1183 | struct handler *handlerlist; | |
1184 | ||
1185 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
9dbc9081 | 1186 | doc: /* Regain control when an error is signaled. |
1b1acc13 | 1187 | Executes BODYFORM and returns its value if no error happens. |
9dbc9081 PJ |
1188 | Each element of HANDLERS looks like (CONDITION-NAME BODY...) |
1189 | where the BODY is made of Lisp expressions. | |
1190 | ||
1191 | A handler is applicable to an error | |
1192 | if CONDITION-NAME is one of the error's condition names. | |
1193 | If an error happens, the first applicable handler is run. | |
1194 | ||
1195 | The car of a handler may be a list of condition names | |
1196 | instead of a single condition name. | |
1197 | ||
1198 | When a handler handles an error, | |
1199 | control returns to the condition-case and the handler BODY... is executed | |
1200 | with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
1201 | VAR may be nil; then you do not get access to the signal information. | |
1202 | ||
1203 | The value of the last BODY form is returned from the condition-case. | |
1204 | See also the function `signal' for more info. | |
1205 | usage: (condition-case VAR BODYFORM HANDLERS...) */) | |
1206 | (args) | |
db9f0278 JB |
1207 | Lisp_Object args; |
1208 | { | |
1209 | Lisp_Object val; | |
1210 | struct catchtag c; | |
1211 | struct handler h; | |
17401c97 GM |
1212 | register Lisp_Object bodyform, handlers; |
1213 | volatile Lisp_Object var; | |
db9f0278 | 1214 | |
82da7701 JB |
1215 | var = Fcar (args); |
1216 | bodyform = Fcar (Fcdr (args)); | |
1217 | handlers = Fcdr (Fcdr (args)); | |
b7826503 | 1218 | CHECK_SYMBOL (var); |
82da7701 JB |
1219 | |
1220 | for (val = handlers; ! NILP (val); val = Fcdr (val)) | |
1221 | { | |
1222 | Lisp_Object tem; | |
1223 | tem = Fcar (val); | |
5f96776a RS |
1224 | if (! (NILP (tem) |
1225 | || (CONSP (tem) | |
03699b14 KR |
1226 | && (SYMBOLP (XCAR (tem)) |
1227 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1228 | error ("Invalid condition handler", tem); |
1229 | } | |
db9f0278 JB |
1230 | |
1231 | c.tag = Qnil; | |
1232 | c.val = Qnil; | |
1233 | c.backlist = backtrace_list; | |
1234 | c.handlerlist = handlerlist; | |
1235 | c.lisp_eval_depth = lisp_eval_depth; | |
1236 | c.pdlcount = specpdl_ptr - specpdl; | |
1237 | c.poll_suppress_count = poll_suppress_count; | |
1238 | c.gcpro = gcprolist; | |
bcf28080 | 1239 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1240 | if (_setjmp (c.jmp)) |
1241 | { | |
265a9e55 | 1242 | if (!NILP (h.var)) |
9d58218c RS |
1243 | specbind (h.var, c.val); |
1244 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1245 | |
1246 | /* Note that this just undoes the binding of h.var; whoever | |
1247 | longjumped to us unwound the stack to c.pdlcount before | |
1248 | throwing. */ | |
db9f0278 JB |
1249 | unbind_to (c.pdlcount, Qnil); |
1250 | return val; | |
1251 | } | |
1252 | c.next = catchlist; | |
1253 | catchlist = &c; | |
db9f0278 | 1254 | |
82da7701 JB |
1255 | h.var = var; |
1256 | h.handler = handlers; | |
db9f0278 | 1257 | h.next = handlerlist; |
db9f0278 JB |
1258 | h.tag = &c; |
1259 | handlerlist = &h; | |
1260 | ||
82da7701 | 1261 | val = Feval (bodyform); |
db9f0278 JB |
1262 | catchlist = c.next; |
1263 | handlerlist = h.next; | |
1264 | return val; | |
1265 | } | |
1266 | ||
f029ca5f RS |
1267 | /* Call the function BFUN with no arguments, catching errors within it |
1268 | according to HANDLERS. If there is an error, call HFUN with | |
1269 | one argument which is the data that describes the error: | |
1270 | (SIGNALNAME . DATA) | |
1271 | ||
1272 | HANDLERS can be a list of conditions to catch. | |
1273 | If HANDLERS is Qt, catch all errors. | |
1274 | If HANDLERS is Qerror, catch all errors | |
1275 | but allow the debugger to run if that is enabled. */ | |
1276 | ||
db9f0278 JB |
1277 | Lisp_Object |
1278 | internal_condition_case (bfun, handlers, hfun) | |
1279 | Lisp_Object (*bfun) (); | |
1280 | Lisp_Object handlers; | |
1281 | Lisp_Object (*hfun) (); | |
1282 | { | |
1283 | Lisp_Object val; | |
1284 | struct catchtag c; | |
1285 | struct handler h; | |
1286 | ||
dccfb979 AI |
1287 | #if 0 /* Can't do this check anymore because realize_basic_faces has |
1288 | to BLOCK_INPUT, and can call Lisp. What's really needed is a | |
1289 | flag indicating that we're currently handling a signal. */ | |
01591d17 RS |
1290 | /* Since Fsignal resets this to 0, it had better be 0 now |
1291 | or else we have a potential bug. */ | |
1292 | if (interrupt_input_blocked != 0) | |
1293 | abort (); | |
dccfb979 | 1294 | #endif |
01591d17 | 1295 | |
db9f0278 JB |
1296 | c.tag = Qnil; |
1297 | c.val = Qnil; | |
1298 | c.backlist = backtrace_list; | |
1299 | c.handlerlist = handlerlist; | |
1300 | c.lisp_eval_depth = lisp_eval_depth; | |
1301 | c.pdlcount = specpdl_ptr - specpdl; | |
1302 | c.poll_suppress_count = poll_suppress_count; | |
1303 | c.gcpro = gcprolist; | |
bcf28080 | 1304 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1305 | if (_setjmp (c.jmp)) |
1306 | { | |
9d58218c | 1307 | return (*hfun) (c.val); |
db9f0278 JB |
1308 | } |
1309 | c.next = catchlist; | |
1310 | catchlist = &c; | |
1311 | h.handler = handlers; | |
1312 | h.var = Qnil; | |
db9f0278 JB |
1313 | h.next = handlerlist; |
1314 | h.tag = &c; | |
1315 | handlerlist = &h; | |
1316 | ||
1317 | val = (*bfun) (); | |
1318 | catchlist = c.next; | |
1319 | handlerlist = h.next; | |
1320 | return val; | |
1321 | } | |
1322 | ||
f029ca5f RS |
1323 | /* Like internal_condition_case but call HFUN with ARG as its argument. */ |
1324 | ||
d227775c RS |
1325 | Lisp_Object |
1326 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1327 | Lisp_Object (*bfun) (); | |
1328 | Lisp_Object arg; | |
1329 | Lisp_Object handlers; | |
1330 | Lisp_Object (*hfun) (); | |
1331 | { | |
1332 | Lisp_Object val; | |
1333 | struct catchtag c; | |
1334 | struct handler h; | |
1335 | ||
1336 | c.tag = Qnil; | |
1337 | c.val = Qnil; | |
1338 | c.backlist = backtrace_list; | |
1339 | c.handlerlist = handlerlist; | |
1340 | c.lisp_eval_depth = lisp_eval_depth; | |
1341 | c.pdlcount = specpdl_ptr - specpdl; | |
1342 | c.poll_suppress_count = poll_suppress_count; | |
1343 | c.gcpro = gcprolist; | |
bcf28080 | 1344 | c.byte_stack = byte_stack_list; |
d227775c RS |
1345 | if (_setjmp (c.jmp)) |
1346 | { | |
9d58218c | 1347 | return (*hfun) (c.val); |
d227775c RS |
1348 | } |
1349 | c.next = catchlist; | |
1350 | catchlist = &c; | |
1351 | h.handler = handlers; | |
1352 | h.var = Qnil; | |
1353 | h.next = handlerlist; | |
1354 | h.tag = &c; | |
1355 | handlerlist = &h; | |
1356 | ||
1357 | val = (*bfun) (arg); | |
1358 | catchlist = c.next; | |
1359 | handlerlist = h.next; | |
1360 | return val; | |
1361 | } | |
10b29d41 GM |
1362 | |
1363 | ||
1364 | /* Like internal_condition_case but call HFUN with NARGS as first, | |
1365 | and ARGS as second argument. */ | |
1366 | ||
1367 | Lisp_Object | |
1368 | internal_condition_case_2 (bfun, nargs, args, handlers, hfun) | |
1369 | Lisp_Object (*bfun) (); | |
1370 | int nargs; | |
1371 | Lisp_Object *args; | |
1372 | Lisp_Object handlers; | |
1373 | Lisp_Object (*hfun) (); | |
1374 | { | |
1375 | Lisp_Object val; | |
1376 | struct catchtag c; | |
1377 | struct handler h; | |
1378 | ||
1379 | c.tag = Qnil; | |
1380 | c.val = Qnil; | |
1381 | c.backlist = backtrace_list; | |
1382 | c.handlerlist = handlerlist; | |
1383 | c.lisp_eval_depth = lisp_eval_depth; | |
1384 | c.pdlcount = specpdl_ptr - specpdl; | |
1385 | c.poll_suppress_count = poll_suppress_count; | |
1386 | c.gcpro = gcprolist; | |
1387 | c.byte_stack = byte_stack_list; | |
1388 | if (_setjmp (c.jmp)) | |
1389 | { | |
1390 | return (*hfun) (c.val); | |
1391 | } | |
1392 | c.next = catchlist; | |
1393 | catchlist = &c; | |
1394 | h.handler = handlers; | |
1395 | h.var = Qnil; | |
1396 | h.next = handlerlist; | |
1397 | h.tag = &c; | |
1398 | handlerlist = &h; | |
1399 | ||
1400 | val = (*bfun) (nargs, args); | |
1401 | catchlist = c.next; | |
1402 | handlerlist = h.next; | |
1403 | return val; | |
1404 | } | |
1405 | ||
d227775c | 1406 | \f |
db9f0278 JB |
1407 | static Lisp_Object find_handler_clause (); |
1408 | ||
1409 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
9dbc9081 PJ |
1410 | doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA. |
1411 | This function does not return. | |
1412 | ||
1413 | An error symbol is a symbol with an `error-conditions' property | |
1414 | that is a list of condition names. | |
1415 | A handler for any of those names will get to handle this signal. | |
1416 | The symbol `error' should normally be one of them. | |
1417 | ||
1418 | DATA should be a list. Its elements are printed as part of the error message. | |
1419 | If the signal is handled, DATA is made available to the handler. | |
1420 | See also the function `condition-case'. */) | |
1421 | (error_symbol, data) | |
4200e719 | 1422 | Lisp_Object error_symbol, data; |
db9f0278 | 1423 | { |
bfa8ca43 AS |
1424 | /* When memory is full, ERROR-SYMBOL is nil, |
1425 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). */ | |
db9f0278 JB |
1426 | register struct handler *allhandlers = handlerlist; |
1427 | Lisp_Object conditions; | |
1428 | extern int gc_in_progress; | |
1429 | extern int waiting_for_input; | |
1430 | Lisp_Object debugger_value; | |
c11d3d17 | 1431 | Lisp_Object string; |
1ea9dec4 | 1432 | Lisp_Object real_error_symbol; |
df6c90d8 | 1433 | extern int display_hourglass_p; |
a2ff3819 | 1434 | struct backtrace *bp; |
db9f0278 | 1435 | |
346598f1 | 1436 | immediate_quit = handling_signal = 0; |
db9f0278 JB |
1437 | if (gc_in_progress || waiting_for_input) |
1438 | abort (); | |
1439 | ||
1440 | TOTALLY_UNBLOCK_INPUT; | |
1441 | ||
1ea9dec4 RS |
1442 | if (NILP (error_symbol)) |
1443 | real_error_symbol = Fcar (data); | |
1444 | else | |
1445 | real_error_symbol = error_symbol; | |
1446 | ||
48f8dfa3 | 1447 | #ifdef HAVE_X_WINDOWS |
df6c90d8 GM |
1448 | if (display_hourglass_p) |
1449 | cancel_hourglass (); | |
48f8dfa3 | 1450 | #endif |
48f8dfa3 | 1451 | |
61ede770 RS |
1452 | /* This hook is used by edebug. */ |
1453 | if (! NILP (Vsignal_hook_function)) | |
f01a9c5b | 1454 | call2 (Vsignal_hook_function, error_symbol, data); |
61ede770 | 1455 | |
1ea9dec4 | 1456 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1457 | |
a2ff3819 GM |
1458 | /* Remember from where signal was called. Skip over the frame for |
1459 | `signal' itself. If a frame for `error' follows, skip that, | |
1460 | too. */ | |
090a072f GM |
1461 | Vsignaling_function = Qnil; |
1462 | if (backtrace_list) | |
1463 | { | |
1464 | bp = backtrace_list->next; | |
1465 | if (bp && bp->function && EQ (*bp->function, Qerror)) | |
1466 | bp = bp->next; | |
1467 | if (bp && bp->function) | |
1468 | Vsignaling_function = *bp->function; | |
1469 | } | |
a2ff3819 | 1470 | |
db9f0278 JB |
1471 | for (; handlerlist; handlerlist = handlerlist->next) |
1472 | { | |
1473 | register Lisp_Object clause; | |
8515044c GM |
1474 | |
1475 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1476 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1477 | ||
1478 | if (specpdl_size + 40 > max_specpdl_size) | |
1479 | max_specpdl_size = specpdl_size + 40; | |
1480 | ||
db9f0278 | 1481 | clause = find_handler_clause (handlerlist->handler, conditions, |
4200e719 | 1482 | error_symbol, data, &debugger_value); |
db9f0278 JB |
1483 | |
1484 | #if 0 /* Most callers are not prepared to handle gc if this returns. | |
1485 | So, since this feature is not very useful, take it out. */ | |
1486 | /* If have called debugger and user wants to continue, | |
1487 | just return nil. */ | |
1488 | if (EQ (clause, Qlambda)) | |
1489 | return debugger_value; | |
1490 | #else | |
1491 | if (EQ (clause, Qlambda)) | |
82da7701 | 1492 | { |
690337b7 KH |
1493 | /* We can't return values to code which signaled an error, but we |
1494 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1495 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1496 | return Qnil; |
1497 | else | |
d3e6f8be | 1498 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1499 | } |
db9f0278 JB |
1500 | #endif |
1501 | ||
265a9e55 | 1502 | if (!NILP (clause)) |
db9f0278 | 1503 | { |
9d58218c | 1504 | Lisp_Object unwind_data; |
db9f0278 | 1505 | struct handler *h = handlerlist; |
9d58218c | 1506 | |
db9f0278 | 1507 | handlerlist = allhandlers; |
1ea9dec4 RS |
1508 | |
1509 | if (NILP (error_symbol)) | |
1510 | unwind_data = data; | |
9d58218c RS |
1511 | else |
1512 | unwind_data = Fcons (error_symbol, data); | |
1513 | h->chosen_clause = clause; | |
1514 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1515 | } |
1516 | } | |
1517 | ||
1518 | handlerlist = allhandlers; | |
1519 | /* If no handler is present now, try to run the debugger, | |
1520 | and if that fails, throw to top level. */ | |
4200e719 | 1521 | find_handler_clause (Qerror, conditions, error_symbol, data, &debugger_value); |
c11d3d17 RS |
1522 | if (catchlist != 0) |
1523 | Fthrow (Qtop_level, Qt); | |
1524 | ||
1ea9dec4 | 1525 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1526 | data = Fcons (error_symbol, data); |
1527 | ||
1528 | string = Ferror_message_string (data); | |
377127ce | 1529 | fatal ("%s", XSTRING (string)->data, 0); |
db9f0278 JB |
1530 | } |
1531 | ||
128c0f66 RM |
1532 | /* Return nonzero iff LIST is a non-nil atom or |
1533 | a list containing one of CONDITIONS. */ | |
1534 | ||
1535 | static int | |
1536 | wants_debugger (list, conditions) | |
1537 | Lisp_Object list, conditions; | |
1538 | { | |
4de86b16 | 1539 | if (NILP (list)) |
128c0f66 RM |
1540 | return 0; |
1541 | if (! CONSP (list)) | |
1542 | return 1; | |
1543 | ||
ab67260b | 1544 | while (CONSP (conditions)) |
128c0f66 | 1545 | { |
ab67260b | 1546 | Lisp_Object this, tail; |
03699b14 KR |
1547 | this = XCAR (conditions); |
1548 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1549 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1550 | return 1; |
03699b14 | 1551 | conditions = XCDR (conditions); |
128c0f66 | 1552 | } |
ab67260b | 1553 | return 0; |
128c0f66 RM |
1554 | } |
1555 | ||
fc950e09 KH |
1556 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1557 | and described by SIGNAL-DATA, should skip the debugger | |
1b1acc13 | 1558 | according to debugger-ignored-errors. */ |
fc950e09 KH |
1559 | |
1560 | static int | |
1561 | skip_debugger (conditions, data) | |
1562 | Lisp_Object conditions, data; | |
1563 | { | |
1564 | Lisp_Object tail; | |
1565 | int first_string = 1; | |
1566 | Lisp_Object error_message; | |
1567 | ||
17401c97 GM |
1568 | error_message = Qnil; |
1569 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1570 | { |
03699b14 | 1571 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1572 | { |
1573 | if (first_string) | |
1574 | { | |
1575 | error_message = Ferror_message_string (data); | |
1576 | first_string = 0; | |
1577 | } | |
17401c97 | 1578 | |
03699b14 | 1579 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1580 | return 1; |
1581 | } | |
1582 | else | |
1583 | { | |
1584 | Lisp_Object contail; | |
1585 | ||
17401c97 | 1586 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1587 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1588 | return 1; |
1589 | } | |
1590 | } | |
1591 | ||
1592 | return 0; | |
1593 | } | |
1594 | ||
128c0f66 | 1595 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1596 | There are two ways to pass SIG and DATA: |
9b942ebd | 1597 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1598 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1599 | This is for memory-full errors only. |
1ea9dec4 | 1600 | |
128c0f66 | 1601 | Store value returned from debugger into *DEBUGGER_VALUE_PTR. */ |
db9f0278 JB |
1602 | |
1603 | static Lisp_Object | |
1604 | find_handler_clause (handlers, conditions, sig, data, debugger_value_ptr) | |
1605 | Lisp_Object handlers, conditions, sig, data; | |
1606 | Lisp_Object *debugger_value_ptr; | |
1607 | { | |
1608 | register Lisp_Object h; | |
1609 | register Lisp_Object tem; | |
db9f0278 JB |
1610 | |
1611 | if (EQ (handlers, Qt)) /* t is used by handlers for all conditions, set up by C code. */ | |
1612 | return Qt; | |
61ede770 RS |
1613 | /* error is used similarly, but means print an error message |
1614 | and run the debugger if that is enabled. */ | |
1615 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1616 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1617 | there is a handler. */ | |
db9f0278 | 1618 | { |
61ede770 RS |
1619 | int count = specpdl_ptr - specpdl; |
1620 | int debugger_called = 0; | |
1ea9dec4 | 1621 | Lisp_Object sig_symbol, combined_data; |
9b942ebd RS |
1622 | /* This is set to 1 if we are handling a memory-full error, |
1623 | because these must not run the debugger. | |
1624 | (There is no room in memory to do that!) */ | |
1625 | int no_debugger = 0; | |
1ea9dec4 RS |
1626 | |
1627 | if (NILP (sig)) | |
1628 | { | |
1629 | combined_data = data; | |
1630 | sig_symbol = Fcar (data); | |
9b942ebd | 1631 | no_debugger = 1; |
1ea9dec4 RS |
1632 | } |
1633 | else | |
1634 | { | |
1635 | combined_data = Fcons (sig, data); | |
1636 | sig_symbol = sig; | |
1637 | } | |
61ede770 | 1638 | |
128c0f66 | 1639 | if (wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b | 1640 | { |
b369fa65 | 1641 | #ifdef PROTOTYPES |
88817f3b RS |
1642 | internal_with_output_to_temp_buffer ("*Backtrace*", |
1643 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1644 | Qnil); | |
1645 | #else | |
1646 | internal_with_output_to_temp_buffer ("*Backtrace*", | |
1647 | Fbacktrace, Qnil); | |
1648 | #endif | |
1649 | } | |
9b942ebd RS |
1650 | if (! no_debugger |
1651 | && (EQ (sig_symbol, Qquit) | |
1652 | ? debug_on_quit | |
1653 | : wants_debugger (Vdebug_on_error, conditions)) | |
1ea9dec4 | 1654 | && ! skip_debugger (conditions, combined_data) |
be857679 | 1655 | && when_entered_debugger < num_nonmacro_input_events) |
db9f0278 | 1656 | { |
db9f0278 | 1657 | specbind (Qdebug_on_error, Qnil); |
fc950e09 KH |
1658 | *debugger_value_ptr |
1659 | = call_debugger (Fcons (Qerror, | |
1ea9dec4 | 1660 | Fcons (combined_data, Qnil))); |
61ede770 RS |
1661 | debugger_called = 1; |
1662 | } | |
1663 | /* If there is no handler, return saying whether we ran the debugger. */ | |
1664 | if (EQ (handlers, Qerror)) | |
1665 | { | |
1666 | if (debugger_called) | |
1667 | return unbind_to (count, Qlambda); | |
1668 | return Qt; | |
db9f0278 | 1669 | } |
db9f0278 JB |
1670 | } |
1671 | for (h = handlers; CONSP (h); h = Fcdr (h)) | |
1672 | { | |
5f96776a RS |
1673 | Lisp_Object handler, condit; |
1674 | ||
1675 | handler = Fcar (h); | |
1676 | if (!CONSP (handler)) | |
db9f0278 | 1677 | continue; |
5f96776a RS |
1678 | condit = Fcar (handler); |
1679 | /* Handle a single condition name in handler HANDLER. */ | |
1680 | if (SYMBOLP (condit)) | |
1681 | { | |
1682 | tem = Fmemq (Fcar (handler), conditions); | |
1683 | if (!NILP (tem)) | |
1684 | return handler; | |
1685 | } | |
1686 | /* Handle a list of condition names in handler HANDLER. */ | |
1687 | else if (CONSP (condit)) | |
1688 | { | |
1689 | while (CONSP (condit)) | |
1690 | { | |
1691 | tem = Fmemq (Fcar (condit), conditions); | |
1692 | if (!NILP (tem)) | |
1693 | return handler; | |
03699b14 | 1694 | condit = XCDR (condit); |
5f96776a RS |
1695 | } |
1696 | } | |
db9f0278 JB |
1697 | } |
1698 | return Qnil; | |
1699 | } | |
1700 | ||
1701 | /* dump an error message; called like printf */ | |
1702 | ||
1703 | /* VARARGS 1 */ | |
1704 | void | |
1705 | error (m, a1, a2, a3) | |
1706 | char *m; | |
9125da08 | 1707 | char *a1, *a2, *a3; |
db9f0278 JB |
1708 | { |
1709 | char buf[200]; | |
9125da08 RS |
1710 | int size = 200; |
1711 | int mlen; | |
1712 | char *buffer = buf; | |
1713 | char *args[3]; | |
1714 | int allocated = 0; | |
1715 | Lisp_Object string; | |
1716 | ||
1717 | args[0] = a1; | |
1718 | args[1] = a2; | |
1719 | args[2] = a3; | |
1720 | ||
1721 | mlen = strlen (m); | |
db9f0278 JB |
1722 | |
1723 | while (1) | |
9125da08 | 1724 | { |
955f3ff9 | 1725 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
1726 | if (used < size) |
1727 | break; | |
1728 | size *= 2; | |
1729 | if (allocated) | |
1730 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
1731 | else |
1732 | { | |
1733 | buffer = (char *) xmalloc (size); | |
1734 | allocated = 1; | |
1735 | } | |
9125da08 RS |
1736 | } |
1737 | ||
955f3ff9 | 1738 | string = build_string (buffer); |
9125da08 | 1739 | if (allocated) |
9ae6734f | 1740 | xfree (buffer); |
9125da08 RS |
1741 | |
1742 | Fsignal (Qerror, Fcons (string, Qnil)); | |
9402dba5 | 1743 | abort (); |
db9f0278 JB |
1744 | } |
1745 | \f | |
1746 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 1, 0, | |
9dbc9081 PJ |
1747 | doc: /* Non-nil if FUNCTION makes provisions for interactive calling. |
1748 | This means it contains a description for how to read arguments to give it. | |
1749 | The value is nil for an invalid function or a symbol with no function | |
1750 | definition. | |
1751 | ||
1752 | Interactively callable functions include strings and vectors (treated | |
1753 | as keyboard macros), lambda-expressions that contain a top-level call | |
1754 | to `interactive', autoload definitions made by `autoload' with non-nil | |
1755 | fourth argument, and some of the built-in functions of Lisp. | |
1756 | ||
1757 | Also, a symbol satisfies `commandp' if its function definition does so. */) | |
1758 | (function) | |
db9f0278 JB |
1759 | Lisp_Object function; |
1760 | { | |
1761 | register Lisp_Object fun; | |
1762 | register Lisp_Object funcar; | |
db9f0278 JB |
1763 | |
1764 | fun = function; | |
1765 | ||
ffd56f97 JB |
1766 | fun = indirect_function (fun); |
1767 | if (EQ (fun, Qunbound)) | |
1768 | return Qnil; | |
db9f0278 JB |
1769 | |
1770 | /* Emacs primitives are interactive if their DEFUN specifies an | |
1771 | interactive spec. */ | |
90165123 | 1772 | if (SUBRP (fun)) |
db9f0278 JB |
1773 | { |
1774 | if (XSUBR (fun)->prompt) | |
1775 | return Qt; | |
1776 | else | |
1777 | return Qnil; | |
1778 | } | |
1779 | ||
1780 | /* Bytecode objects are interactive if they are long enough to | |
1781 | have an element whose index is COMPILED_INTERACTIVE, which is | |
1782 | where the interactive spec is stored. */ | |
90165123 | 1783 | else if (COMPILEDP (fun)) |
f9b4aacf | 1784 | return ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
db9f0278 JB |
1785 | ? Qt : Qnil); |
1786 | ||
1787 | /* Strings and vectors are keyboard macros. */ | |
90165123 | 1788 | if (STRINGP (fun) || VECTORP (fun)) |
db9f0278 JB |
1789 | return Qt; |
1790 | ||
1791 | /* Lists may represent commands. */ | |
1792 | if (!CONSP (fun)) | |
1793 | return Qnil; | |
1794 | funcar = Fcar (fun); | |
90165123 | 1795 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
1796 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
1797 | if (EQ (funcar, Qlambda)) | |
1798 | return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
1799 | if (EQ (funcar, Qmocklisp)) | |
1800 | return Qt; /* All mocklisp functions can be called interactively */ | |
1801 | if (EQ (funcar, Qautoload)) | |
1802 | return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
1803 | else | |
1804 | return Qnil; | |
1805 | } | |
1806 | ||
1807 | /* ARGSUSED */ | |
1808 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, | |
9dbc9081 PJ |
1809 | doc: /* Define FUNCTION to autoload from FILE. |
1810 | FUNCTION is a symbol; FILE is a file name string to pass to `load'. | |
1811 | Third arg DOCSTRING is documentation for the function. | |
1812 | Fourth arg INTERACTIVE if non-nil says function can be called interactively. | |
1813 | Fifth arg TYPE indicates the type of the object: | |
1814 | nil or omitted says FUNCTION is a function, | |
1815 | `keymap' says FUNCTION is really a keymap, and | |
1816 | `macro' or t says FUNCTION is really a macro. | |
1817 | Third through fifth args give info about the real definition. | |
1818 | They default to nil. | |
1819 | If FUNCTION is already defined other than as an autoload, | |
1820 | this does nothing and returns nil. */) | |
1821 | (function, file, docstring, interactive, type) | |
ee9ee63c | 1822 | Lisp_Object function, file, docstring, interactive, type; |
db9f0278 JB |
1823 | { |
1824 | #ifdef NO_ARG_ARRAY | |
1825 | Lisp_Object args[4]; | |
1826 | #endif | |
1827 | ||
b7826503 PJ |
1828 | CHECK_SYMBOL (function); |
1829 | CHECK_STRING (file); | |
db9f0278 JB |
1830 | |
1831 | /* If function is defined and not as an autoload, don't override */ | |
1832 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 1833 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 1834 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
1835 | return Qnil; |
1836 | ||
7973e637 SM |
1837 | if (NILP (Vpurify_flag)) |
1838 | /* Only add entries after dumping, because the ones before are | |
1839 | not useful and else we get loads of them from the loaddefs.el. */ | |
1840 | LOADHIST_ATTACH (Fcons (Qautoload, function)); | |
1841 | ||
db9f0278 JB |
1842 | #ifdef NO_ARG_ARRAY |
1843 | args[0] = file; | |
1844 | args[1] = docstring; | |
1845 | args[2] = interactive; | |
ee9ee63c | 1846 | args[3] = type; |
db9f0278 JB |
1847 | |
1848 | return Ffset (function, Fcons (Qautoload, Flist (4, &args[0]))); | |
1849 | #else /* NO_ARG_ARRAY */ | |
1850 | return Ffset (function, Fcons (Qautoload, Flist (4, &file))); | |
1851 | #endif /* not NO_ARG_ARRAY */ | |
1852 | } | |
1853 | ||
1854 | Lisp_Object | |
1855 | un_autoload (oldqueue) | |
1856 | Lisp_Object oldqueue; | |
1857 | { | |
1858 | register Lisp_Object queue, first, second; | |
1859 | ||
1860 | /* Queue to unwind is current value of Vautoload_queue. | |
1861 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
1862 | queue = Vautoload_queue; | |
1863 | Vautoload_queue = oldqueue; | |
1864 | while (CONSP (queue)) | |
1865 | { | |
1866 | first = Fcar (queue); | |
1867 | second = Fcdr (first); | |
1868 | first = Fcar (first); | |
1869 | if (EQ (second, Qnil)) | |
1870 | Vfeatures = first; | |
1871 | else | |
1872 | Ffset (first, second); | |
1873 | queue = Fcdr (queue); | |
1874 | } | |
1875 | return Qnil; | |
1876 | } | |
1877 | ||
ca20916b RS |
1878 | /* Load an autoloaded function. |
1879 | FUNNAME is the symbol which is the function's name. | |
1880 | FUNDEF is the autoload definition (a list). */ | |
1881 | ||
045ba794 | 1882 | void |
db9f0278 JB |
1883 | do_autoload (fundef, funname) |
1884 | Lisp_Object fundef, funname; | |
1885 | { | |
1886 | int count = specpdl_ptr - specpdl; | |
cb81ac97 | 1887 | Lisp_Object fun, queue, first, second; |
ca20916b | 1888 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 JB |
1889 | |
1890 | fun = funname; | |
b7826503 | 1891 | CHECK_SYMBOL (funname); |
ca20916b | 1892 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 1893 | |
f87740dc RS |
1894 | /* Preserve the match data. */ |
1895 | record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil)); | |
1896 | ||
1897 | /* Value saved here is to be restored into Vautoload_queue. */ | |
db9f0278 JB |
1898 | record_unwind_protect (un_autoload, Vautoload_queue); |
1899 | Vautoload_queue = Qt; | |
4aac2302 | 1900 | Fload (Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil, Qt); |
2a49b6e5 | 1901 | |
f87740dc | 1902 | /* Save the old autoloads, in case we ever do an unload. */ |
2a49b6e5 RS |
1903 | queue = Vautoload_queue; |
1904 | while (CONSP (queue)) | |
1905 | { | |
1906 | first = Fcar (queue); | |
1907 | second = Fcdr (first); | |
1908 | first = Fcar (first); | |
5739ce6b ER |
1909 | |
1910 | /* Note: This test is subtle. The cdr of an autoload-queue entry | |
1911 | may be an atom if the autoload entry was generated by a defalias | |
f87740dc | 1912 | or fset. */ |
5739ce6b | 1913 | if (CONSP (second)) |
03e267c2 | 1914 | Fput (first, Qautoload, (Fcdr (second))); |
5739ce6b | 1915 | |
2a49b6e5 RS |
1916 | queue = Fcdr (queue); |
1917 | } | |
1918 | ||
db9f0278 JB |
1919 | /* Once loading finishes, don't undo it. */ |
1920 | Vautoload_queue = Qt; | |
1921 | unbind_to (count, Qnil); | |
1922 | ||
ffd56f97 JB |
1923 | fun = Findirect_function (fun); |
1924 | ||
76c2b0cc | 1925 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 JB |
1926 | error ("Autoloading failed to define function %s", |
1927 | XSYMBOL (funname)->name->data); | |
ca20916b | 1928 | UNGCPRO; |
db9f0278 | 1929 | } |
4c576a83 | 1930 | |
db9f0278 JB |
1931 | \f |
1932 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
9dbc9081 PJ |
1933 | doc: /* Evaluate FORM and return its value. */) |
1934 | (form) | |
db9f0278 JB |
1935 | Lisp_Object form; |
1936 | { | |
1937 | Lisp_Object fun, val, original_fun, original_args; | |
1938 | Lisp_Object funcar; | |
1939 | struct backtrace backtrace; | |
1940 | struct gcpro gcpro1, gcpro2, gcpro3; | |
1941 | ||
4c576a83 | 1942 | if (handling_signal) |
48f8dfa3 GM |
1943 | abort (); |
1944 | ||
90165123 | 1945 | if (SYMBOLP (form)) |
db9f0278 JB |
1946 | { |
1947 | if (EQ (Vmocklisp_arguments, Qt)) | |
1948 | return Fsymbol_value (form); | |
1949 | val = Fsymbol_value (form); | |
265a9e55 | 1950 | if (NILP (val)) |
a631e24c | 1951 | XSETFASTINT (val, 0); |
db9f0278 | 1952 | else if (EQ (val, Qt)) |
a631e24c | 1953 | XSETFASTINT (val, 1); |
db9f0278 JB |
1954 | return val; |
1955 | } | |
1956 | if (!CONSP (form)) | |
1957 | return form; | |
1958 | ||
1959 | QUIT; | |
1960 | if (consing_since_gc > gc_cons_threshold) | |
1961 | { | |
1962 | GCPRO1 (form); | |
1963 | Fgarbage_collect (); | |
1964 | UNGCPRO; | |
1965 | } | |
1966 | ||
1967 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
1968 | { | |
1969 | if (max_lisp_eval_depth < 100) | |
1970 | max_lisp_eval_depth = 100; | |
1971 | if (lisp_eval_depth > max_lisp_eval_depth) | |
1972 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
1973 | } | |
1974 | ||
1975 | original_fun = Fcar (form); | |
1976 | original_args = Fcdr (form); | |
1977 | ||
1978 | backtrace.next = backtrace_list; | |
1979 | backtrace_list = &backtrace; | |
1980 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
1981 | backtrace.args = &original_args; | |
1982 | backtrace.nargs = UNEVALLED; | |
1983 | backtrace.evalargs = 1; | |
1984 | backtrace.debug_on_exit = 0; | |
1985 | ||
1986 | if (debug_on_next_call) | |
1987 | do_debug_on_call (Qt); | |
1988 | ||
1989 | /* At this point, only original_fun and original_args | |
1990 | have values that will be used below */ | |
1991 | retry: | |
ffd56f97 | 1992 | fun = Findirect_function (original_fun); |
db9f0278 | 1993 | |
90165123 | 1994 | if (SUBRP (fun)) |
db9f0278 JB |
1995 | { |
1996 | Lisp_Object numargs; | |
166c822d | 1997 | Lisp_Object argvals[8]; |
db9f0278 JB |
1998 | Lisp_Object args_left; |
1999 | register int i, maxargs; | |
2000 | ||
2001 | args_left = original_args; | |
2002 | numargs = Flength (args_left); | |
2003 | ||
2004 | if (XINT (numargs) < XSUBR (fun)->min_args || | |
2005 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
2006 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (numargs, Qnil))); | |
2007 | ||
2008 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2009 | { | |
2010 | backtrace.evalargs = 0; | |
2011 | val = (*XSUBR (fun)->function) (args_left); | |
2012 | goto done; | |
2013 | } | |
2014 | ||
2015 | if (XSUBR (fun)->max_args == MANY) | |
2016 | { | |
2017 | /* Pass a vector of evaluated arguments */ | |
2018 | Lisp_Object *vals; | |
2019 | register int argnum = 0; | |
2020 | ||
2021 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2022 | ||
2023 | GCPRO3 (args_left, fun, fun); | |
2024 | gcpro3.var = vals; | |
2025 | gcpro3.nvars = 0; | |
2026 | ||
265a9e55 | 2027 | while (!NILP (args_left)) |
db9f0278 JB |
2028 | { |
2029 | vals[argnum++] = Feval (Fcar (args_left)); | |
2030 | args_left = Fcdr (args_left); | |
2031 | gcpro3.nvars = argnum; | |
2032 | } | |
db9f0278 JB |
2033 | |
2034 | backtrace.args = vals; | |
2035 | backtrace.nargs = XINT (numargs); | |
2036 | ||
2037 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 2038 | UNGCPRO; |
db9f0278 JB |
2039 | goto done; |
2040 | } | |
2041 | ||
2042 | GCPRO3 (args_left, fun, fun); | |
2043 | gcpro3.var = argvals; | |
2044 | gcpro3.nvars = 0; | |
2045 | ||
2046 | maxargs = XSUBR (fun)->max_args; | |
2047 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
2048 | { | |
2049 | argvals[i] = Feval (Fcar (args_left)); | |
2050 | gcpro3.nvars = ++i; | |
2051 | } | |
2052 | ||
2053 | UNGCPRO; | |
2054 | ||
2055 | backtrace.args = argvals; | |
2056 | backtrace.nargs = XINT (numargs); | |
2057 | ||
2058 | switch (i) | |
2059 | { | |
2060 | case 0: | |
2061 | val = (*XSUBR (fun)->function) (); | |
2062 | goto done; | |
2063 | case 1: | |
2064 | val = (*XSUBR (fun)->function) (argvals[0]); | |
2065 | goto done; | |
2066 | case 2: | |
2067 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
2068 | goto done; | |
2069 | case 3: | |
2070 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2071 | argvals[2]); | |
2072 | goto done; | |
2073 | case 4: | |
2074 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2075 | argvals[2], argvals[3]); | |
2076 | goto done; | |
2077 | case 5: | |
2078 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2079 | argvals[3], argvals[4]); | |
2080 | goto done; | |
2081 | case 6: | |
2082 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2083 | argvals[3], argvals[4], argvals[5]); | |
2084 | goto done; | |
15c65264 RS |
2085 | case 7: |
2086 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2087 | argvals[3], argvals[4], argvals[5], | |
2088 | argvals[6]); | |
2089 | goto done; | |
db9f0278 | 2090 | |
166c822d KH |
2091 | case 8: |
2092 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2093 | argvals[3], argvals[4], argvals[5], | |
2094 | argvals[6], argvals[7]); | |
2095 | goto done; | |
2096 | ||
db9f0278 | 2097 | default: |
08564963 JB |
2098 | /* Someone has created a subr that takes more arguments than |
2099 | is supported by this code. We need to either rewrite the | |
2100 | subr to use a different argument protocol, or add more | |
2101 | cases to this switch. */ | |
2102 | abort (); | |
db9f0278 JB |
2103 | } |
2104 | } | |
90165123 | 2105 | if (COMPILEDP (fun)) |
db9f0278 JB |
2106 | val = apply_lambda (fun, original_args, 1); |
2107 | else | |
2108 | { | |
2109 | if (!CONSP (fun)) | |
2110 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2111 | funcar = Fcar (fun); | |
90165123 | 2112 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
2113 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
2114 | if (EQ (funcar, Qautoload)) | |
2115 | { | |
2116 | do_autoload (fun, original_fun); | |
2117 | goto retry; | |
2118 | } | |
2119 | if (EQ (funcar, Qmacro)) | |
2120 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
2121 | else if (EQ (funcar, Qlambda)) | |
2122 | val = apply_lambda (fun, original_args, 1); | |
2123 | else if (EQ (funcar, Qmocklisp)) | |
2124 | val = ml_apply (fun, original_args); | |
2125 | else | |
2126 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2127 | } | |
2128 | done: | |
2129 | if (!EQ (Vmocklisp_arguments, Qt)) | |
2130 | { | |
265a9e55 | 2131 | if (NILP (val)) |
a631e24c | 2132 | XSETFASTINT (val, 0); |
db9f0278 | 2133 | else if (EQ (val, Qt)) |
a631e24c | 2134 | XSETFASTINT (val, 1); |
db9f0278 JB |
2135 | } |
2136 | lisp_eval_depth--; | |
2137 | if (backtrace.debug_on_exit) | |
2138 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2139 | backtrace_list = backtrace.next; | |
2140 | return val; | |
2141 | } | |
2142 | \f | |
2143 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
9dbc9081 PJ |
2144 | doc: /* Call FUNCTION with our remaining args, using our last arg as list of args. |
2145 | Then return the value FUNCTION returns. | |
2146 | Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
2147 | usage: (apply FUNCTION &rest ARGUMENTS) */) | |
2148 | (nargs, args) | |
db9f0278 JB |
2149 | int nargs; |
2150 | Lisp_Object *args; | |
2151 | { | |
2152 | register int i, numargs; | |
2153 | register Lisp_Object spread_arg; | |
2154 | register Lisp_Object *funcall_args; | |
db9f0278 | 2155 | Lisp_Object fun; |
a6e3fa71 | 2156 | struct gcpro gcpro1; |
db9f0278 JB |
2157 | |
2158 | fun = args [0]; | |
2159 | funcall_args = 0; | |
2160 | spread_arg = args [nargs - 1]; | |
b7826503 | 2161 | CHECK_LIST (spread_arg); |
db9f0278 JB |
2162 | |
2163 | numargs = XINT (Flength (spread_arg)); | |
2164 | ||
2165 | if (numargs == 0) | |
2166 | return Ffuncall (nargs - 1, args); | |
2167 | else if (numargs == 1) | |
2168 | { | |
03699b14 | 2169 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2170 | return Ffuncall (nargs, args); |
2171 | } | |
2172 | ||
a6e3fa71 | 2173 | numargs += nargs - 2; |
db9f0278 | 2174 | |
ffd56f97 JB |
2175 | fun = indirect_function (fun); |
2176 | if (EQ (fun, Qunbound)) | |
db9f0278 | 2177 | { |
ffd56f97 JB |
2178 | /* Let funcall get the error */ |
2179 | fun = args[0]; | |
2180 | goto funcall; | |
db9f0278 JB |
2181 | } |
2182 | ||
90165123 | 2183 | if (SUBRP (fun)) |
db9f0278 JB |
2184 | { |
2185 | if (numargs < XSUBR (fun)->min_args | |
2186 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2187 | goto funcall; /* Let funcall get the error */ | |
2188 | else if (XSUBR (fun)->max_args > numargs) | |
2189 | { | |
2190 | /* Avoid making funcall cons up a yet another new vector of arguments | |
2191 | by explicitly supplying nil's for optional values */ | |
2192 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
2193 | * sizeof (Lisp_Object)); | |
2194 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
2195 | funcall_args[++i] = Qnil; | |
a6e3fa71 JB |
2196 | GCPRO1 (*funcall_args); |
2197 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2198 | } |
2199 | } | |
2200 | funcall: | |
2201 | /* We add 1 to numargs because funcall_args includes the | |
2202 | function itself as well as its arguments. */ | |
2203 | if (!funcall_args) | |
a6e3fa71 JB |
2204 | { |
2205 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
2206 | * sizeof (Lisp_Object)); | |
2207 | GCPRO1 (*funcall_args); | |
2208 | gcpro1.nvars = 1 + numargs; | |
2209 | } | |
2210 | ||
db9f0278 JB |
2211 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
2212 | /* Spread the last arg we got. Its first element goes in | |
2213 | the slot that it used to occupy, hence this value of I. */ | |
2214 | i = nargs - 1; | |
265a9e55 | 2215 | while (!NILP (spread_arg)) |
db9f0278 | 2216 | { |
03699b14 KR |
2217 | funcall_args [i++] = XCAR (spread_arg); |
2218 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2219 | } |
a6e3fa71 JB |
2220 | |
2221 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
2222 | } |
2223 | \f | |
ff936e53 SM |
2224 | /* Run hook variables in various ways. */ |
2225 | ||
2226 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2227 | ||
8b5176cd | 2228 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
9dbc9081 PJ |
2229 | doc: /* Run each hook in HOOKS. Major mode functions use this. |
2230 | Each argument should be a symbol, a hook variable. | |
2231 | These symbols are processed in the order specified. | |
2232 | If a hook symbol has a non-nil value, that value may be a function | |
2233 | or a list of functions to be called to run the hook. | |
2234 | If the value is a function, it is called with no arguments. | |
2235 | If it is a list, the elements are called, in order, with no arguments. | |
2236 | ||
72e85d5d RS |
2237 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2238 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2239 | usage: (run-hooks &rest HOOKS) */) |
2240 | (nargs, args) | |
ff936e53 SM |
2241 | int nargs; |
2242 | Lisp_Object *args; | |
2243 | { | |
2244 | Lisp_Object hook[1]; | |
2245 | register int i; | |
2246 | ||
2247 | for (i = 0; i < nargs; i++) | |
2248 | { | |
2249 | hook[0] = args[i]; | |
2250 | run_hook_with_args (1, hook, to_completion); | |
2251 | } | |
2252 | ||
2253 | return Qnil; | |
2254 | } | |
2255 | ||
a0d76c27 | 2256 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
9dbc9081 PJ |
2257 | Srun_hook_with_args, 1, MANY, 0, |
2258 | doc: /* Run HOOK with the specified arguments ARGS. | |
2259 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
2260 | value, that value may be a function or a list of functions to be | |
2261 | called to run the hook. If the value is a function, it is called with | |
2262 | the given arguments and its return value is returned. If it is a list | |
2263 | of functions, those functions are called, in order, | |
2264 | with the given arguments ARGS. | |
2265 | It is best not to depend on the value return by `run-hook-with-args', | |
2266 | as that may change. | |
2267 | ||
72e85d5d RS |
2268 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2269 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2270 | usage: (run-hook-with-args HOOK &rest ARGS) */) |
2271 | (nargs, args) | |
ff936e53 SM |
2272 | int nargs; |
2273 | Lisp_Object *args; | |
2274 | { | |
2275 | return run_hook_with_args (nargs, args, to_completion); | |
2276 | } | |
2277 | ||
a0d76c27 | 2278 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
9dbc9081 PJ |
2279 | Srun_hook_with_args_until_success, 1, MANY, 0, |
2280 | doc: /* Run HOOK with the specified arguments ARGS. | |
2281 | HOOK should be a symbol, a hook variable. Its value should | |
2282 | be a list of functions. We call those functions, one by one, | |
2283 | passing arguments ARGS to each of them, until one of them | |
2284 | returns a non-nil value. Then we return that value. | |
2285 | If all the functions return nil, we return nil. | |
2286 | ||
72e85d5d RS |
2287 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2288 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2289 | usage: (run-hook-with-args-until-success HOOK &rest ARGS) */) |
2290 | (nargs, args) | |
b0b667cb KH |
2291 | int nargs; |
2292 | Lisp_Object *args; | |
2293 | { | |
ff936e53 SM |
2294 | return run_hook_with_args (nargs, args, until_success); |
2295 | } | |
2296 | ||
a0d76c27 | 2297 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
9dbc9081 PJ |
2298 | Srun_hook_with_args_until_failure, 1, MANY, 0, |
2299 | doc: /* Run HOOK with the specified arguments ARGS. | |
2300 | HOOK should be a symbol, a hook variable. Its value should | |
2301 | be a list of functions. We call those functions, one by one, | |
2302 | passing arguments ARGS to each of them, until one of them | |
2303 | returns nil. Then we return nil. | |
2304 | If all the functions return non-nil, we return non-nil. | |
2305 | ||
72e85d5d RS |
2306 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2307 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2308 | usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */) |
2309 | (nargs, args) | |
ff936e53 SM |
2310 | int nargs; |
2311 | Lisp_Object *args; | |
2312 | { | |
2313 | return run_hook_with_args (nargs, args, until_failure); | |
2314 | } | |
2315 | ||
c933ea05 RS |
2316 | /* ARGS[0] should be a hook symbol. |
2317 | Call each of the functions in the hook value, passing each of them | |
2318 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2319 | COND specifies a condition to test after each call | |
2320 | to decide whether to stop. | |
2321 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2322 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2323 | ||
ff936e53 SM |
2324 | Lisp_Object |
2325 | run_hook_with_args (nargs, args, cond) | |
2326 | int nargs; | |
2327 | Lisp_Object *args; | |
2328 | enum run_hooks_condition cond; | |
2329 | { | |
2330 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2331 | Lisp_Object globals; |
2332 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2333 | |
f029ca5f RS |
2334 | /* If we are dying or still initializing, |
2335 | don't do anything--it would probably crash if we tried. */ | |
2336 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2337 | return Qnil; |
f029ca5f | 2338 | |
b0b667cb | 2339 | sym = args[0]; |
aa681b51 | 2340 | val = find_symbol_value (sym); |
ff936e53 SM |
2341 | ret = (cond == until_failure ? Qt : Qnil); |
2342 | ||
b0b667cb | 2343 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2344 | return ret; |
03699b14 | 2345 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2346 | { |
2347 | args[0] = val; | |
2348 | return Ffuncall (nargs, args); | |
2349 | } | |
2350 | else | |
2351 | { | |
fada05d6 KH |
2352 | globals = Qnil; |
2353 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2354 | |
ff936e53 SM |
2355 | for (; |
2356 | CONSP (val) && ((cond == to_completion) | |
2357 | || (cond == until_success ? NILP (ret) | |
2358 | : !NILP (ret))); | |
03699b14 | 2359 | val = XCDR (val)) |
b0b667cb | 2360 | { |
03699b14 | 2361 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2362 | { |
2363 | /* t indicates this hook has a local binding; | |
2364 | it means to run the global binding too. */ | |
b0b667cb | 2365 | |
ff936e53 SM |
2366 | for (globals = Fdefault_value (sym); |
2367 | CONSP (globals) && ((cond == to_completion) | |
2368 | || (cond == until_success ? NILP (ret) | |
2369 | : !NILP (ret))); | |
03699b14 | 2370 | globals = XCDR (globals)) |
b0b667cb | 2371 | { |
03699b14 | 2372 | args[0] = XCAR (globals); |
77d92e05 RS |
2373 | /* In a global value, t should not occur. If it does, we |
2374 | must ignore it to avoid an endless loop. */ | |
2375 | if (!EQ (args[0], Qt)) | |
2376 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2377 | } |
2378 | } | |
2379 | else | |
2380 | { | |
03699b14 | 2381 | args[0] = XCAR (val); |
ff936e53 | 2382 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2383 | } |
2384 | } | |
cb9d21f8 RS |
2385 | |
2386 | UNGCPRO; | |
ff936e53 | 2387 | return ret; |
b0b667cb KH |
2388 | } |
2389 | } | |
c933ea05 RS |
2390 | |
2391 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2392 | present value of that symbol. | |
2393 | Call each element of FUNLIST, | |
2394 | passing each of them the rest of ARGS. | |
2395 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2396 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2397 | ||
2398 | Lisp_Object | |
2399 | run_hook_list_with_args (funlist, nargs, args) | |
2400 | Lisp_Object funlist; | |
2401 | int nargs; | |
2402 | Lisp_Object *args; | |
2403 | { | |
2404 | Lisp_Object sym; | |
2405 | Lisp_Object val; | |
fada05d6 KH |
2406 | Lisp_Object globals; |
2407 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2408 | |
2409 | sym = args[0]; | |
fada05d6 KH |
2410 | globals = Qnil; |
2411 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2412 | |
03699b14 | 2413 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2414 | { |
03699b14 | 2415 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2416 | { |
2417 | /* t indicates this hook has a local binding; | |
2418 | it means to run the global binding too. */ | |
c933ea05 RS |
2419 | |
2420 | for (globals = Fdefault_value (sym); | |
2421 | CONSP (globals); | |
03699b14 | 2422 | globals = XCDR (globals)) |
c933ea05 | 2423 | { |
03699b14 | 2424 | args[0] = XCAR (globals); |
77d92e05 RS |
2425 | /* In a global value, t should not occur. If it does, we |
2426 | must ignore it to avoid an endless loop. */ | |
2427 | if (!EQ (args[0], Qt)) | |
2428 | Ffuncall (nargs, args); | |
c933ea05 RS |
2429 | } |
2430 | } | |
2431 | else | |
2432 | { | |
03699b14 | 2433 | args[0] = XCAR (val); |
c933ea05 RS |
2434 | Ffuncall (nargs, args); |
2435 | } | |
2436 | } | |
2437 | UNGCPRO; | |
2438 | return Qnil; | |
2439 | } | |
7d48558f RS |
2440 | |
2441 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2442 | ||
2443 | void | |
2444 | run_hook_with_args_2 (hook, arg1, arg2) | |
2445 | Lisp_Object hook, arg1, arg2; | |
2446 | { | |
2447 | Lisp_Object temp[3]; | |
2448 | temp[0] = hook; | |
2449 | temp[1] = arg1; | |
2450 | temp[2] = arg2; | |
2451 | ||
2452 | Frun_hook_with_args (3, temp); | |
2453 | } | |
ff936e53 | 2454 | \f |
db9f0278 JB |
2455 | /* Apply fn to arg */ |
2456 | Lisp_Object | |
2457 | apply1 (fn, arg) | |
2458 | Lisp_Object fn, arg; | |
2459 | { | |
a6e3fa71 JB |
2460 | struct gcpro gcpro1; |
2461 | ||
2462 | GCPRO1 (fn); | |
265a9e55 | 2463 | if (NILP (arg)) |
a6e3fa71 JB |
2464 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2465 | gcpro1.nvars = 2; | |
db9f0278 JB |
2466 | #ifdef NO_ARG_ARRAY |
2467 | { | |
2468 | Lisp_Object args[2]; | |
2469 | args[0] = fn; | |
2470 | args[1] = arg; | |
a6e3fa71 JB |
2471 | gcpro1.var = args; |
2472 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2473 | } |
2474 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2475 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2476 | #endif /* not NO_ARG_ARRAY */ |
2477 | } | |
2478 | ||
2479 | /* Call function fn on no arguments */ | |
2480 | Lisp_Object | |
2481 | call0 (fn) | |
2482 | Lisp_Object fn; | |
2483 | { | |
a6e3fa71 JB |
2484 | struct gcpro gcpro1; |
2485 | ||
2486 | GCPRO1 (fn); | |
2487 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2488 | } |
2489 | ||
15285f9f | 2490 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2491 | /* ARGSUSED */ |
2492 | Lisp_Object | |
15285f9f RS |
2493 | call1 (fn, arg1) |
2494 | Lisp_Object fn, arg1; | |
db9f0278 | 2495 | { |
a6e3fa71 | 2496 | struct gcpro gcpro1; |
db9f0278 | 2497 | #ifdef NO_ARG_ARRAY |
a6e3fa71 JB |
2498 | Lisp_Object args[2]; |
2499 | ||
db9f0278 | 2500 | args[0] = fn; |
15285f9f | 2501 | args[1] = arg1; |
a6e3fa71 JB |
2502 | GCPRO1 (args[0]); |
2503 | gcpro1.nvars = 2; | |
2504 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2505 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2506 | GCPRO1 (fn); |
2507 | gcpro1.nvars = 2; | |
2508 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2509 | #endif /* not NO_ARG_ARRAY */ |
2510 | } | |
2511 | ||
15285f9f | 2512 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2513 | /* ARGSUSED */ |
2514 | Lisp_Object | |
15285f9f RS |
2515 | call2 (fn, arg1, arg2) |
2516 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2517 | { |
a6e3fa71 | 2518 | struct gcpro gcpro1; |
db9f0278 JB |
2519 | #ifdef NO_ARG_ARRAY |
2520 | Lisp_Object args[3]; | |
2521 | args[0] = fn; | |
15285f9f RS |
2522 | args[1] = arg1; |
2523 | args[2] = arg2; | |
a6e3fa71 JB |
2524 | GCPRO1 (args[0]); |
2525 | gcpro1.nvars = 3; | |
2526 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2527 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2528 | GCPRO1 (fn); |
2529 | gcpro1.nvars = 3; | |
2530 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2531 | #endif /* not NO_ARG_ARRAY */ |
2532 | } | |
2533 | ||
15285f9f | 2534 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2535 | /* ARGSUSED */ |
2536 | Lisp_Object | |
15285f9f RS |
2537 | call3 (fn, arg1, arg2, arg3) |
2538 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2539 | { |
a6e3fa71 | 2540 | struct gcpro gcpro1; |
db9f0278 JB |
2541 | #ifdef NO_ARG_ARRAY |
2542 | Lisp_Object args[4]; | |
2543 | args[0] = fn; | |
15285f9f RS |
2544 | args[1] = arg1; |
2545 | args[2] = arg2; | |
2546 | args[3] = arg3; | |
a6e3fa71 JB |
2547 | GCPRO1 (args[0]); |
2548 | gcpro1.nvars = 4; | |
2549 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2550 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2551 | GCPRO1 (fn); |
2552 | gcpro1.nvars = 4; | |
2553 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2554 | #endif /* not NO_ARG_ARRAY */ |
2555 | } | |
2556 | ||
15285f9f | 2557 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2558 | /* ARGSUSED */ |
2559 | Lisp_Object | |
15285f9f RS |
2560 | call4 (fn, arg1, arg2, arg3, arg4) |
2561 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2562 | { |
2563 | struct gcpro gcpro1; | |
2564 | #ifdef NO_ARG_ARRAY | |
2565 | Lisp_Object args[5]; | |
2566 | args[0] = fn; | |
15285f9f RS |
2567 | args[1] = arg1; |
2568 | args[2] = arg2; | |
2569 | args[3] = arg3; | |
2570 | args[4] = arg4; | |
a5a44b91 JB |
2571 | GCPRO1 (args[0]); |
2572 | gcpro1.nvars = 5; | |
2573 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2574 | #else /* not NO_ARG_ARRAY */ | |
2575 | GCPRO1 (fn); | |
2576 | gcpro1.nvars = 5; | |
2577 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2578 | #endif /* not NO_ARG_ARRAY */ | |
2579 | } | |
2580 | ||
15285f9f RS |
2581 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2582 | /* ARGSUSED */ | |
2583 | Lisp_Object | |
2584 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2585 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2586 | { | |
2587 | struct gcpro gcpro1; | |
2588 | #ifdef NO_ARG_ARRAY | |
2589 | Lisp_Object args[6]; | |
2590 | args[0] = fn; | |
2591 | args[1] = arg1; | |
2592 | args[2] = arg2; | |
2593 | args[3] = arg3; | |
2594 | args[4] = arg4; | |
2595 | args[5] = arg5; | |
2596 | GCPRO1 (args[0]); | |
2597 | gcpro1.nvars = 6; | |
2598 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2599 | #else /* not NO_ARG_ARRAY */ | |
2600 | GCPRO1 (fn); | |
2601 | gcpro1.nvars = 6; | |
2602 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2603 | #endif /* not NO_ARG_ARRAY */ | |
2604 | } | |
2605 | ||
2606 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2607 | /* ARGSUSED */ | |
2608 | Lisp_Object | |
2609 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2610 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2611 | { | |
2612 | struct gcpro gcpro1; | |
2613 | #ifdef NO_ARG_ARRAY | |
2614 | Lisp_Object args[7]; | |
2615 | args[0] = fn; | |
2616 | args[1] = arg1; | |
2617 | args[2] = arg2; | |
2618 | args[3] = arg3; | |
2619 | args[4] = arg4; | |
2620 | args[5] = arg5; | |
2621 | args[6] = arg6; | |
2622 | GCPRO1 (args[0]); | |
2623 | gcpro1.nvars = 7; | |
2624 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2625 | #else /* not NO_ARG_ARRAY */ | |
2626 | GCPRO1 (fn); | |
2627 | gcpro1.nvars = 7; | |
2628 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2629 | #endif /* not NO_ARG_ARRAY */ | |
2630 | } | |
2631 | ||
db9f0278 | 2632 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
9dbc9081 PJ |
2633 | doc: /* Call first argument as a function, passing remaining arguments to it. |
2634 | Return the value that function returns. | |
2635 | Thus, (funcall 'cons 'x 'y) returns (x . y). | |
2636 | usage: (funcall FUNCTION &rest ARGUMENTS) */) | |
2637 | (nargs, args) | |
db9f0278 JB |
2638 | int nargs; |
2639 | Lisp_Object *args; | |
2640 | { | |
2641 | Lisp_Object fun; | |
2642 | Lisp_Object funcar; | |
2643 | int numargs = nargs - 1; | |
2644 | Lisp_Object lisp_numargs; | |
2645 | Lisp_Object val; | |
2646 | struct backtrace backtrace; | |
2647 | register Lisp_Object *internal_args; | |
2648 | register int i; | |
2649 | ||
2650 | QUIT; | |
2651 | if (consing_since_gc > gc_cons_threshold) | |
a6e3fa71 | 2652 | Fgarbage_collect (); |
db9f0278 JB |
2653 | |
2654 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2655 | { | |
2656 | if (max_lisp_eval_depth < 100) | |
2657 | max_lisp_eval_depth = 100; | |
2658 | if (lisp_eval_depth > max_lisp_eval_depth) | |
2659 | error ("Lisp nesting exceeds max-lisp-eval-depth"); | |
2660 | } | |
2661 | ||
2662 | backtrace.next = backtrace_list; | |
2663 | backtrace_list = &backtrace; | |
2664 | backtrace.function = &args[0]; | |
2665 | backtrace.args = &args[1]; | |
2666 | backtrace.nargs = nargs - 1; | |
2667 | backtrace.evalargs = 0; | |
2668 | backtrace.debug_on_exit = 0; | |
2669 | ||
2670 | if (debug_on_next_call) | |
2671 | do_debug_on_call (Qlambda); | |
2672 | ||
2673 | retry: | |
2674 | ||
2675 | fun = args[0]; | |
ffd56f97 JB |
2676 | |
2677 | fun = Findirect_function (fun); | |
db9f0278 | 2678 | |
90165123 | 2679 | if (SUBRP (fun)) |
db9f0278 JB |
2680 | { |
2681 | if (numargs < XSUBR (fun)->min_args | |
2682 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2683 | { | |
a631e24c | 2684 | XSETFASTINT (lisp_numargs, numargs); |
db9f0278 JB |
2685 | return Fsignal (Qwrong_number_of_arguments, Fcons (fun, Fcons (lisp_numargs, Qnil))); |
2686 | } | |
2687 | ||
2688 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2689 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2690 | ||
2691 | if (XSUBR (fun)->max_args == MANY) | |
2692 | { | |
2693 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
2694 | goto done; | |
2695 | } | |
2696 | ||
2697 | if (XSUBR (fun)->max_args > numargs) | |
2698 | { | |
2699 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
2700 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
2701 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
2702 | internal_args[i] = Qnil; | |
2703 | } | |
2704 | else | |
2705 | internal_args = args + 1; | |
2706 | switch (XSUBR (fun)->max_args) | |
2707 | { | |
2708 | case 0: | |
2709 | val = (*XSUBR (fun)->function) (); | |
2710 | goto done; | |
2711 | case 1: | |
2712 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
2713 | goto done; | |
2714 | case 2: | |
2715 | val = (*XSUBR (fun)->function) (internal_args[0], | |
2716 | internal_args[1]); | |
2717 | goto done; | |
2718 | case 3: | |
2719 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2720 | internal_args[2]); | |
2721 | goto done; | |
2722 | case 4: | |
2723 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2724 | internal_args[2], | |
2725 | internal_args[3]); | |
2726 | goto done; | |
2727 | case 5: | |
2728 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2729 | internal_args[2], internal_args[3], | |
2730 | internal_args[4]); | |
2731 | goto done; | |
2732 | case 6: | |
2733 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2734 | internal_args[2], internal_args[3], | |
2735 | internal_args[4], internal_args[5]); | |
2736 | goto done; | |
15c65264 RS |
2737 | case 7: |
2738 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2739 | internal_args[2], internal_args[3], | |
2740 | internal_args[4], internal_args[5], | |
2741 | internal_args[6]); | |
2742 | goto done; | |
db9f0278 | 2743 | |
166c822d KH |
2744 | case 8: |
2745 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
2746 | internal_args[2], internal_args[3], | |
2747 | internal_args[4], internal_args[5], | |
2748 | internal_args[6], internal_args[7]); | |
2749 | goto done; | |
2750 | ||
db9f0278 | 2751 | default: |
70ee42f7 | 2752 | |
166c822d | 2753 | /* If a subr takes more than 8 arguments without using MANY |
70ee42f7 JB |
2754 | or UNEVALLED, we need to extend this function to support it. |
2755 | Until this is done, there is no way to call the function. */ | |
2756 | abort (); | |
db9f0278 JB |
2757 | } |
2758 | } | |
90165123 | 2759 | if (COMPILEDP (fun)) |
db9f0278 JB |
2760 | val = funcall_lambda (fun, numargs, args + 1); |
2761 | else | |
2762 | { | |
2763 | if (!CONSP (fun)) | |
2764 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2765 | funcar = Fcar (fun); | |
90165123 | 2766 | if (!SYMBOLP (funcar)) |
db9f0278 JB |
2767 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
2768 | if (EQ (funcar, Qlambda)) | |
2769 | val = funcall_lambda (fun, numargs, args + 1); | |
2770 | else if (EQ (funcar, Qmocklisp)) | |
2771 | val = ml_apply (fun, Flist (numargs, args + 1)); | |
2772 | else if (EQ (funcar, Qautoload)) | |
2773 | { | |
2774 | do_autoload (fun, args[0]); | |
2775 | goto retry; | |
2776 | } | |
2777 | else | |
2778 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2779 | } | |
2780 | done: | |
2781 | lisp_eval_depth--; | |
2782 | if (backtrace.debug_on_exit) | |
2783 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2784 | backtrace_list = backtrace.next; | |
2785 | return val; | |
2786 | } | |
2787 | \f | |
2788 | Lisp_Object | |
2789 | apply_lambda (fun, args, eval_flag) | |
2790 | Lisp_Object fun, args; | |
2791 | int eval_flag; | |
2792 | { | |
2793 | Lisp_Object args_left; | |
2794 | Lisp_Object numargs; | |
2795 | register Lisp_Object *arg_vector; | |
2796 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2797 | register int i; | |
2798 | register Lisp_Object tem; | |
2799 | ||
2800 | numargs = Flength (args); | |
2801 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2802 | args_left = args; | |
2803 | ||
2804 | GCPRO3 (*arg_vector, args_left, fun); | |
2805 | gcpro1.nvars = 0; | |
2806 | ||
2807 | for (i = 0; i < XINT (numargs);) | |
2808 | { | |
2809 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
2810 | if (eval_flag) tem = Feval (tem); | |
2811 | arg_vector[i++] = tem; | |
2812 | gcpro1.nvars = i; | |
2813 | } | |
2814 | ||
2815 | UNGCPRO; | |
2816 | ||
2817 | if (eval_flag) | |
2818 | { | |
2819 | backtrace_list->args = arg_vector; | |
2820 | backtrace_list->nargs = i; | |
2821 | } | |
2822 | backtrace_list->evalargs = 0; | |
2823 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
2824 | ||
2825 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
2826 | if (backtrace_list->debug_on_exit) | |
2827 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
2828 | /* Don't do it again when we return to eval. */ | |
2829 | backtrace_list->debug_on_exit = 0; | |
2830 | return tem; | |
2831 | } | |
2832 | ||
2833 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
2834 | and return the result of evaluation. | |
2835 | FUN must be either a lambda-expression or a compiled-code object. */ | |
2836 | ||
2837 | Lisp_Object | |
2838 | funcall_lambda (fun, nargs, arg_vector) | |
2839 | Lisp_Object fun; | |
2840 | int nargs; | |
2841 | register Lisp_Object *arg_vector; | |
2842 | { | |
9ab90667 | 2843 | Lisp_Object val, syms_left, next; |
db9f0278 | 2844 | int count = specpdl_ptr - specpdl; |
9ab90667 | 2845 | int i, optional, rest; |
db9f0278 | 2846 | |
9ab90667 GM |
2847 | if (NILP (Vmocklisp_arguments)) |
2848 | specbind (Qmocklisp_arguments, Qt); /* t means NOT mocklisp! */ | |
db9f0278 | 2849 | |
90165123 | 2850 | if (CONSP (fun)) |
9ab90667 GM |
2851 | { |
2852 | syms_left = XCDR (fun); | |
2853 | if (CONSP (syms_left)) | |
2854 | syms_left = XCAR (syms_left); | |
2855 | else | |
2856 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2857 | } | |
90165123 | 2858 | else if (COMPILEDP (fun)) |
db9f0278 | 2859 | syms_left = XVECTOR (fun)->contents[COMPILED_ARGLIST]; |
9ab90667 GM |
2860 | else |
2861 | abort (); | |
db9f0278 | 2862 | |
9ab90667 GM |
2863 | i = optional = rest = 0; |
2864 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
2865 | { |
2866 | QUIT; | |
9ab90667 GM |
2867 | |
2868 | next = XCAR (syms_left); | |
90165123 | 2869 | while (!SYMBOLP (next)) |
9ffa21d4 | 2870 | next = Fsignal (Qinvalid_function, Fcons (fun, Qnil)); |
9ab90667 | 2871 | |
db9f0278 JB |
2872 | if (EQ (next, Qand_rest)) |
2873 | rest = 1; | |
2874 | else if (EQ (next, Qand_optional)) | |
2875 | optional = 1; | |
2876 | else if (rest) | |
2877 | { | |
9ffa21d4 | 2878 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
2879 | i = nargs; |
2880 | } | |
2881 | else if (i < nargs) | |
9ab90667 | 2882 | specbind (next, arg_vector[i++]); |
db9f0278 | 2883 | else if (!optional) |
9ab90667 GM |
2884 | return Fsignal (Qwrong_number_of_arguments, |
2885 | Fcons (fun, Fcons (make_number (nargs), Qnil))); | |
db9f0278 JB |
2886 | else |
2887 | specbind (next, Qnil); | |
2888 | } | |
2889 | ||
9ab90667 GM |
2890 | if (!NILP (syms_left)) |
2891 | return Fsignal (Qinvalid_function, Fcons (fun, Qnil)); | |
2892 | else if (i < nargs) | |
2893 | return Fsignal (Qwrong_number_of_arguments, | |
2894 | Fcons (fun, Fcons (make_number (nargs), Qnil))); | |
db9f0278 | 2895 | |
90165123 | 2896 | if (CONSP (fun)) |
9ab90667 | 2897 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 2898 | else |
ca248607 RS |
2899 | { |
2900 | /* If we have not actually read the bytecode string | |
2901 | and constants vector yet, fetch them from the file. */ | |
2902 | if (CONSP (XVECTOR (fun)->contents[COMPILED_BYTECODE])) | |
661c7d6e | 2903 | Ffetch_bytecode (fun); |
ca248607 RS |
2904 | val = Fbyte_code (XVECTOR (fun)->contents[COMPILED_BYTECODE], |
2905 | XVECTOR (fun)->contents[COMPILED_CONSTANTS], | |
2906 | XVECTOR (fun)->contents[COMPILED_STACK_DEPTH]); | |
2907 | } | |
9ab90667 | 2908 | |
db9f0278 JB |
2909 | return unbind_to (count, val); |
2910 | } | |
661c7d6e KH |
2911 | |
2912 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
9dbc9081 PJ |
2913 | 1, 1, 0, |
2914 | doc: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */) | |
2915 | (object) | |
661c7d6e KH |
2916 | Lisp_Object object; |
2917 | { | |
2918 | Lisp_Object tem; | |
2919 | ||
2920 | if (COMPILEDP (object) | |
2921 | && CONSP (XVECTOR (object)->contents[COMPILED_BYTECODE])) | |
2922 | { | |
2923 | tem = read_doc_string (XVECTOR (object)->contents[COMPILED_BYTECODE]); | |
5bbdb090 RS |
2924 | if (!CONSP (tem)) |
2925 | error ("invalid byte code"); | |
03699b14 KR |
2926 | XVECTOR (object)->contents[COMPILED_BYTECODE] = XCAR (tem); |
2927 | XVECTOR (object)->contents[COMPILED_CONSTANTS] = XCDR (tem); | |
661c7d6e KH |
2928 | } |
2929 | return object; | |
2930 | } | |
db9f0278 JB |
2931 | \f |
2932 | void | |
2933 | grow_specpdl () | |
2934 | { | |
2935 | register int count = specpdl_ptr - specpdl; | |
2936 | if (specpdl_size >= max_specpdl_size) | |
2937 | { | |
2938 | if (max_specpdl_size < 400) | |
2939 | max_specpdl_size = 400; | |
2940 | if (specpdl_size >= max_specpdl_size) | |
2941 | { | |
debee8fe RS |
2942 | if (!NILP (Vdebug_on_error)) |
2943 | /* Leave room for some specpdl in the debugger. */ | |
2944 | max_specpdl_size = specpdl_size + 100; | |
db9f0278 JB |
2945 | Fsignal (Qerror, |
2946 | Fcons (build_string ("Variable binding depth exceeds max-specpdl-size"), Qnil)); | |
db9f0278 JB |
2947 | } |
2948 | } | |
2949 | specpdl_size *= 2; | |
2950 | if (specpdl_size > max_specpdl_size) | |
2951 | specpdl_size = max_specpdl_size; | |
2952 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
2953 | specpdl_ptr = specpdl + count; | |
2954 | } | |
2955 | ||
2956 | void | |
2957 | specbind (symbol, value) | |
2958 | Lisp_Object symbol, value; | |
2959 | { | |
db9f0278 | 2960 | Lisp_Object ovalue; |
19cebf5a | 2961 | Lisp_Object valcontents; |
db9f0278 | 2962 | |
b7826503 | 2963 | CHECK_SYMBOL (symbol); |
db9f0278 JB |
2964 | if (specpdl_ptr == specpdl + specpdl_size) |
2965 | grow_specpdl (); | |
719177b3 | 2966 | |
19cebf5a GM |
2967 | /* The most common case is that of a non-constant symbol with a |
2968 | trivial value. Make that as fast as we can. */ | |
2969 | valcontents = SYMBOL_VALUE (symbol); | |
2970 | if (!MISCP (valcontents) && !SYMBOL_CONSTANT_P (symbol)) | |
719177b3 | 2971 | { |
9ab90667 | 2972 | specpdl_ptr->symbol = symbol; |
19cebf5a | 2973 | specpdl_ptr->old_value = valcontents; |
9ab90667 GM |
2974 | specpdl_ptr->func = NULL; |
2975 | ++specpdl_ptr; | |
19cebf5a | 2976 | SET_SYMBOL_VALUE (symbol, value); |
719177b3 RS |
2977 | } |
2978 | else | |
9ab90667 | 2979 | { |
eb700b82 GM |
2980 | Lisp_Object valcontents; |
2981 | ||
9ab90667 GM |
2982 | ovalue = find_symbol_value (symbol); |
2983 | specpdl_ptr->func = 0; | |
2984 | specpdl_ptr->old_value = ovalue; | |
719177b3 | 2985 | |
eb700b82 GM |
2986 | valcontents = XSYMBOL (symbol)->value; |
2987 | ||
2988 | if (BUFFER_LOCAL_VALUEP (valcontents) | |
2989 | || SOME_BUFFER_LOCAL_VALUEP (valcontents) | |
2990 | || BUFFER_OBJFWDP (valcontents)) | |
9ab90667 | 2991 | { |
0967b4b0 GM |
2992 | Lisp_Object where, current_buffer; |
2993 | ||
2994 | current_buffer = Fcurrent_buffer (); | |
06bccf8e | 2995 | |
9ab90667 | 2996 | /* For a local variable, record both the symbol and which |
eb700b82 GM |
2997 | buffer's or frame's value we are saving. */ |
2998 | if (!NILP (Flocal_variable_p (symbol, Qnil))) | |
0967b4b0 | 2999 | where = current_buffer; |
eb700b82 GM |
3000 | else if (!BUFFER_OBJFWDP (valcontents) |
3001 | && XBUFFER_LOCAL_VALUE (valcontents)->found_for_frame) | |
3002 | where = XBUFFER_LOCAL_VALUE (valcontents)->frame; | |
3003 | else | |
3004 | where = Qnil; | |
3005 | ||
3006 | /* We're not using the `unused' slot in the specbinding | |
3007 | structure because this would mean we have to do more | |
3008 | work for simple variables. */ | |
0967b4b0 | 3009 | specpdl_ptr->symbol = Fcons (symbol, Fcons (where, current_buffer)); |
06bccf8e GM |
3010 | |
3011 | /* If SYMBOL is a per-buffer variable which doesn't have a | |
3012 | buffer-local value here, make the `let' change the global | |
3013 | value by changing the value of SYMBOL in all buffers not | |
3014 | having their own value. This is consistent with what | |
3015 | happens with other buffer-local variables. */ | |
eb700b82 GM |
3016 | if (NILP (where) |
3017 | && BUFFER_OBJFWDP (valcontents)) | |
06bccf8e GM |
3018 | { |
3019 | ++specpdl_ptr; | |
3020 | Fset_default (symbol, value); | |
3021 | return; | |
3022 | } | |
9ab90667 GM |
3023 | } |
3024 | else | |
3025 | specpdl_ptr->symbol = symbol; | |
3026 | ||
3027 | specpdl_ptr++; | |
3028 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) | |
eae0e123 | 3029 | store_symval_forwarding (symbol, ovalue, value, NULL); |
9ab90667 GM |
3030 | else |
3031 | set_internal (symbol, value, 0, 1); | |
3032 | } | |
db9f0278 JB |
3033 | } |
3034 | ||
3035 | void | |
3036 | record_unwind_protect (function, arg) | |
1d159538 | 3037 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
3038 | Lisp_Object arg; |
3039 | { | |
3040 | if (specpdl_ptr == specpdl + specpdl_size) | |
3041 | grow_specpdl (); | |
3042 | specpdl_ptr->func = function; | |
3043 | specpdl_ptr->symbol = Qnil; | |
3044 | specpdl_ptr->old_value = arg; | |
3045 | specpdl_ptr++; | |
3046 | } | |
3047 | ||
3048 | Lisp_Object | |
3049 | unbind_to (count, value) | |
3050 | int count; | |
3051 | Lisp_Object value; | |
3052 | { | |
265a9e55 | 3053 | int quitf = !NILP (Vquit_flag); |
db9f0278 JB |
3054 | struct gcpro gcpro1; |
3055 | ||
3056 | GCPRO1 (value); | |
db9f0278 JB |
3057 | Vquit_flag = Qnil; |
3058 | ||
3059 | while (specpdl_ptr != specpdl + count) | |
3060 | { | |
3061 | --specpdl_ptr; | |
eb700b82 | 3062 | |
db9f0278 JB |
3063 | if (specpdl_ptr->func != 0) |
3064 | (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
3065 | /* Note that a "binding" of nil is really an unwind protect, | |
719177b3 | 3066 | so in that case the "old value" is a list of forms to evaluate. */ |
265a9e55 | 3067 | else if (NILP (specpdl_ptr->symbol)) |
db9f0278 | 3068 | Fprogn (specpdl_ptr->old_value); |
0967b4b0 GM |
3069 | /* If the symbol is a list, it is really (SYMBOL WHERE |
3070 | . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a | |
3071 | frame. If WHERE is a buffer or frame, this indicates we | |
1b1acc13 PJ |
3072 | bound a variable that had a buffer-local or frame-local |
3073 | binding. WHERE nil means that the variable had the default | |
0967b4b0 GM |
3074 | value when it was bound. CURRENT-BUFFER is the buffer that |
3075 | was current when the variable was bound. */ | |
719177b3 RS |
3076 | else if (CONSP (specpdl_ptr->symbol)) |
3077 | { | |
eb700b82 | 3078 | Lisp_Object symbol, where; |
719177b3 RS |
3079 | |
3080 | symbol = XCAR (specpdl_ptr->symbol); | |
0967b4b0 | 3081 | where = XCAR (XCDR (specpdl_ptr->symbol)); |
719177b3 | 3082 | |
eb700b82 | 3083 | if (NILP (where)) |
719177b3 | 3084 | Fset_default (symbol, specpdl_ptr->old_value); |
eb700b82 GM |
3085 | else if (BUFFERP (where)) |
3086 | set_internal (symbol, specpdl_ptr->old_value, XBUFFER (where), 1); | |
3087 | else | |
3088 | set_internal (symbol, specpdl_ptr->old_value, NULL, 1); | |
719177b3 | 3089 | } |
db9f0278 | 3090 | else |
9ab90667 GM |
3091 | { |
3092 | /* If variable has a trivial value (no forwarding), we can | |
3093 | just set it. No need to check for constant symbols here, | |
3094 | since that was already done by specbind. */ | |
19cebf5a GM |
3095 | if (!MISCP (SYMBOL_VALUE (specpdl_ptr->symbol))) |
3096 | SET_SYMBOL_VALUE (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
9ab90667 GM |
3097 | else |
3098 | set_internal (specpdl_ptr->symbol, specpdl_ptr->old_value, 0, 1); | |
3099 | } | |
db9f0278 | 3100 | } |
9ab90667 GM |
3101 | |
3102 | if (NILP (Vquit_flag) && quitf) | |
3103 | Vquit_flag = Qt; | |
db9f0278 JB |
3104 | |
3105 | UNGCPRO; | |
db9f0278 JB |
3106 | return value; |
3107 | } | |
3108 | \f | |
3109 | #if 0 | |
3110 | ||
3111 | /* Get the value of symbol's global binding, even if that binding | |
3112 | is not now dynamically visible. */ | |
3113 | ||
3114 | Lisp_Object | |
3115 | top_level_value (symbol) | |
3116 | Lisp_Object symbol; | |
3117 | { | |
3118 | register struct specbinding *ptr = specpdl; | |
3119 | ||
b7826503 | 3120 | CHECK_SYMBOL (symbol); |
db9f0278 JB |
3121 | for (; ptr != specpdl_ptr; ptr++) |
3122 | { | |
3123 | if (EQ (ptr->symbol, symbol)) | |
3124 | return ptr->old_value; | |
3125 | } | |
3126 | return Fsymbol_value (symbol); | |
3127 | } | |
3128 | ||
3129 | Lisp_Object | |
3130 | top_level_set (symbol, newval) | |
3131 | Lisp_Object symbol, newval; | |
3132 | { | |
3133 | register struct specbinding *ptr = specpdl; | |
3134 | ||
b7826503 | 3135 | CHECK_SYMBOL (symbol); |
db9f0278 JB |
3136 | for (; ptr != specpdl_ptr; ptr++) |
3137 | { | |
3138 | if (EQ (ptr->symbol, symbol)) | |
3139 | { | |
3140 | ptr->old_value = newval; | |
3141 | return newval; | |
3142 | } | |
3143 | } | |
3144 | return Fset (symbol, newval); | |
3145 | } | |
3146 | ||
3147 | #endif /* 0 */ | |
3148 | \f | |
3149 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, | |
9dbc9081 PJ |
3150 | doc: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. |
3151 | The debugger is entered when that frame exits, if the flag is non-nil. */) | |
3152 | (level, flag) | |
db9f0278 JB |
3153 | Lisp_Object level, flag; |
3154 | { | |
3155 | register struct backtrace *backlist = backtrace_list; | |
3156 | register int i; | |
3157 | ||
b7826503 | 3158 | CHECK_NUMBER (level); |
db9f0278 JB |
3159 | |
3160 | for (i = 0; backlist && i < XINT (level); i++) | |
3161 | { | |
3162 | backlist = backlist->next; | |
3163 | } | |
3164 | ||
3165 | if (backlist) | |
265a9e55 | 3166 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
3167 | |
3168 | return flag; | |
3169 | } | |
3170 | ||
3171 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
9dbc9081 PJ |
3172 | doc: /* Print a trace of Lisp function calls currently active. |
3173 | Output stream used is value of `standard-output'. */) | |
3174 | () | |
db9f0278 JB |
3175 | { |
3176 | register struct backtrace *backlist = backtrace_list; | |
3177 | register int i; | |
3178 | Lisp_Object tail; | |
3179 | Lisp_Object tem; | |
3180 | extern Lisp_Object Vprint_level; | |
3181 | struct gcpro gcpro1; | |
3182 | ||
a631e24c | 3183 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
3184 | |
3185 | tail = Qnil; | |
3186 | GCPRO1 (tail); | |
3187 | ||
3188 | while (backlist) | |
3189 | { | |
3190 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
3191 | if (backlist->nargs == UNEVALLED) | |
3192 | { | |
3193 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 3194 | write_string ("\n", -1); |
db9f0278 JB |
3195 | } |
3196 | else | |
3197 | { | |
3198 | tem = *backlist->function; | |
3199 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
3200 | write_string ("(", -1); | |
3201 | if (backlist->nargs == MANY) | |
3202 | { | |
3203 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 3204 | !NILP (tail); |
db9f0278 JB |
3205 | tail = Fcdr (tail), i++) |
3206 | { | |
3207 | if (i) write_string (" ", -1); | |
3208 | Fprin1 (Fcar (tail), Qnil); | |
3209 | } | |
3210 | } | |
3211 | else | |
3212 | { | |
3213 | for (i = 0; i < backlist->nargs; i++) | |
3214 | { | |
3215 | if (i) write_string (" ", -1); | |
3216 | Fprin1 (backlist->args[i], Qnil); | |
3217 | } | |
3218 | } | |
b6703b02 | 3219 | write_string (")\n", -1); |
db9f0278 | 3220 | } |
db9f0278 JB |
3221 | backlist = backlist->next; |
3222 | } | |
3223 | ||
3224 | Vprint_level = Qnil; | |
3225 | UNGCPRO; | |
3226 | return Qnil; | |
3227 | } | |
3228 | ||
17401c97 | 3229 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
9dbc9081 PJ |
3230 | doc: /* Return the function and arguments NFRAMES up from current execution point. |
3231 | If that frame has not evaluated the arguments yet (or is a special form), | |
3232 | the value is (nil FUNCTION ARG-FORMS...). | |
3233 | If that frame has evaluated its arguments and called its function already, | |
3234 | the value is (t FUNCTION ARG-VALUES...). | |
3235 | A &rest arg is represented as the tail of the list ARG-VALUES. | |
3236 | FUNCTION is whatever was supplied as car of evaluated list, | |
3237 | or a lambda expression for macro calls. | |
3238 | If NFRAMES is more than the number of frames, the value is nil. */) | |
3239 | (nframes) | |
db9f0278 JB |
3240 | Lisp_Object nframes; |
3241 | { | |
3242 | register struct backtrace *backlist = backtrace_list; | |
3243 | register int i; | |
3244 | Lisp_Object tem; | |
3245 | ||
b7826503 | 3246 | CHECK_NATNUM (nframes); |
db9f0278 JB |
3247 | |
3248 | /* Find the frame requested. */ | |
b6703b02 | 3249 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
3250 | backlist = backlist->next; |
3251 | ||
3252 | if (!backlist) | |
3253 | return Qnil; | |
3254 | if (backlist->nargs == UNEVALLED) | |
3255 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
3256 | else | |
3257 | { | |
3258 | if (backlist->nargs == MANY) | |
3259 | tem = *backlist->args; | |
3260 | else | |
3261 | tem = Flist (backlist->nargs, backlist->args); | |
3262 | ||
3263 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3264 | } | |
3265 | } | |
a2ff3819 | 3266 | |
db9f0278 | 3267 | \f |
dfcf069d | 3268 | void |
db9f0278 JB |
3269 | syms_of_eval () |
3270 | { | |
3271 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
9dbc9081 PJ |
3272 | doc: /* *Limit on number of Lisp variable bindings & unwind-protects. |
3273 | If Lisp code tries to make more than this many at once, | |
3274 | an error is signaled. */); | |
db9f0278 JB |
3275 | |
3276 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
9dbc9081 PJ |
3277 | doc: /* *Limit on depth in `eval', `apply' and `funcall' before error. |
3278 | This limit is to catch infinite recursions for you before they cause | |
3279 | actual stack overflow in C, which would be fatal for Emacs. | |
3280 | You can safely make it considerably larger than its default value, | |
3281 | if that proves inconveniently small. */); | |
db9f0278 JB |
3282 | |
3283 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
9dbc9081 PJ |
3284 | doc: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil. |
3285 | Typing C-g sets `quit-flag' non-nil, regardless of `inhibit-quit'. */); | |
db9f0278 JB |
3286 | Vquit_flag = Qnil; |
3287 | ||
3288 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
9dbc9081 PJ |
3289 | doc: /* Non-nil inhibits C-g quitting from happening immediately. |
3290 | Note that `quit-flag' will still be set by typing C-g, | |
3291 | so a quit will be signaled as soon as `inhibit-quit' is nil. | |
3292 | To prevent this happening, set `quit-flag' to nil | |
3293 | before making `inhibit-quit' nil. */); | |
db9f0278 JB |
3294 | Vinhibit_quit = Qnil; |
3295 | ||
ad236261 JB |
3296 | Qinhibit_quit = intern ("inhibit-quit"); |
3297 | staticpro (&Qinhibit_quit); | |
3298 | ||
db9f0278 JB |
3299 | Qautoload = intern ("autoload"); |
3300 | staticpro (&Qautoload); | |
3301 | ||
3302 | Qdebug_on_error = intern ("debug-on-error"); | |
3303 | staticpro (&Qdebug_on_error); | |
3304 | ||
3305 | Qmacro = intern ("macro"); | |
3306 | staticpro (&Qmacro); | |
3307 | ||
3308 | /* Note that the process handling also uses Qexit, but we don't want | |
3309 | to staticpro it twice, so we just do it here. */ | |
3310 | Qexit = intern ("exit"); | |
3311 | staticpro (&Qexit); | |
3312 | ||
3313 | Qinteractive = intern ("interactive"); | |
3314 | staticpro (&Qinteractive); | |
3315 | ||
3316 | Qcommandp = intern ("commandp"); | |
3317 | staticpro (&Qcommandp); | |
3318 | ||
3319 | Qdefun = intern ("defun"); | |
3320 | staticpro (&Qdefun); | |
3321 | ||
3322 | Qand_rest = intern ("&rest"); | |
3323 | staticpro (&Qand_rest); | |
3324 | ||
3325 | Qand_optional = intern ("&optional"); | |
3326 | staticpro (&Qand_optional); | |
3327 | ||
128c0f66 | 3328 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
9dbc9081 PJ |
3329 | doc: /* *Non-nil means automatically display a backtrace buffer |
3330 | after any error that is handled by the editor command loop. | |
3331 | If the value is a list, an error only means to display a backtrace | |
3332 | if one of its condition symbols appears in the list. */); | |
128c0f66 | 3333 | Vstack_trace_on_error = Qnil; |
db9f0278 | 3334 | |
128c0f66 | 3335 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
9dbc9081 PJ |
3336 | doc: /* *Non-nil means enter debugger if an error is signaled. |
3337 | Does not apply to errors handled by `condition-case' or those | |
3338 | matched by `debug-ignored-errors'. | |
3339 | If the value is a list, an error only means to enter the debugger | |
3340 | if one of its condition symbols appears in the list. | |
3341 | When you evaluate an expression interactively, this variable | |
3342 | is temporarily non-nil if `eval-expression-debug-on-error' is non-nil. | |
3343 | See also variable `debug-on-quit'. */); | |
128c0f66 | 3344 | Vdebug_on_error = Qnil; |
db9f0278 | 3345 | |
fc950e09 | 3346 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
9dbc9081 PJ |
3347 | doc: /* *List of errors for which the debugger should not be called. |
3348 | Each element may be a condition-name or a regexp that matches error messages. | |
3349 | If any element applies to a given error, that error skips the debugger | |
3350 | and just returns to top level. | |
3351 | This overrides the variable `debug-on-error'. | |
3352 | It does not apply to errors handled by `condition-case'. */); | |
fc950e09 KH |
3353 | Vdebug_ignored_errors = Qnil; |
3354 | ||
db9f0278 | 3355 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
9dbc9081 PJ |
3356 | doc: /* *Non-nil means enter debugger if quit is signaled (C-g, for example). |
3357 | Does not apply if quit is handled by a `condition-case'. | |
3358 | When you evaluate an expression interactively, this variable | |
3359 | is temporarily non-nil if `eval-expression-debug-on-quit' is non-nil. */); | |
db9f0278 JB |
3360 | debug_on_quit = 0; |
3361 | ||
3362 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
9dbc9081 | 3363 | doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */); |
db9f0278 | 3364 | |
556d7314 | 3365 | DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue, |
9dbc9081 PJ |
3366 | doc: /* Non-nil means debugger may continue execution. |
3367 | This is nil when the debugger is called under circumstances where it | |
3368 | might not be safe to continue. */); | |
dac204bc | 3369 | debugger_may_continue = 1; |
556d7314 | 3370 | |
db9f0278 | 3371 | DEFVAR_LISP ("debugger", &Vdebugger, |
9dbc9081 PJ |
3372 | doc: /* Function to call to invoke debugger. |
3373 | If due to frame exit, args are `exit' and the value being returned; | |
3374 | this function's value will be returned instead of that. | |
3375 | If due to error, args are `error' and a list of the args to `signal'. | |
3376 | If due to `apply' or `funcall' entry, one arg, `lambda'. | |
3377 | If due to `eval' entry, one arg, t. */); | |
db9f0278 JB |
3378 | Vdebugger = Qnil; |
3379 | ||
61ede770 | 3380 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
9dbc9081 PJ |
3381 | doc: /* If non-nil, this is a function for `signal' to call. |
3382 | It receives the same arguments that `signal' was given. | |
3383 | The Edebug package uses this to regain control. */); | |
61ede770 RS |
3384 | Vsignal_hook_function = Qnil; |
3385 | ||
db9f0278 JB |
3386 | Qmocklisp_arguments = intern ("mocklisp-arguments"); |
3387 | staticpro (&Qmocklisp_arguments); | |
3388 | DEFVAR_LISP ("mocklisp-arguments", &Vmocklisp_arguments, | |
9dbc9081 | 3389 | doc: /* While in a mocklisp function, the list of its unevaluated args. */); |
db9f0278 JB |
3390 | Vmocklisp_arguments = Qt; |
3391 | ||
57a6e758 | 3392 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
9dbc9081 PJ |
3393 | doc: /* *Non-nil means call the debugger regardless of condition handlers. |
3394 | Note that `debug-on-error', `debug-on-quit' and friends | |
3395 | still determine whether to handle the particular condition. */); | |
57a6e758 | 3396 | Vdebug_on_signal = Qnil; |
61ede770 | 3397 | |
6e6e9f08 RS |
3398 | Vrun_hooks = intern ("run-hooks"); |
3399 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3400 | |
3401 | staticpro (&Vautoload_queue); | |
3402 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3403 | staticpro (&Vsignaling_function); |
3404 | Vsignaling_function = Qnil; | |
db9f0278 JB |
3405 | |
3406 | defsubr (&Sor); | |
3407 | defsubr (&Sand); | |
3408 | defsubr (&Sif); | |
3409 | defsubr (&Scond); | |
3410 | defsubr (&Sprogn); | |
3411 | defsubr (&Sprog1); | |
3412 | defsubr (&Sprog2); | |
3413 | defsubr (&Ssetq); | |
3414 | defsubr (&Squote); | |
3415 | defsubr (&Sfunction); | |
3416 | defsubr (&Sdefun); | |
3417 | defsubr (&Sdefmacro); | |
3418 | defsubr (&Sdefvar); | |
19cebf5a | 3419 | defsubr (&Sdefvaralias); |
db9f0278 JB |
3420 | defsubr (&Sdefconst); |
3421 | defsubr (&Suser_variable_p); | |
3422 | defsubr (&Slet); | |
3423 | defsubr (&SletX); | |
3424 | defsubr (&Swhile); | |
3425 | defsubr (&Smacroexpand); | |
3426 | defsubr (&Scatch); | |
3427 | defsubr (&Sthrow); | |
3428 | defsubr (&Sunwind_protect); | |
3429 | defsubr (&Scondition_case); | |
3430 | defsubr (&Ssignal); | |
3431 | defsubr (&Sinteractive_p); | |
3432 | defsubr (&Scommandp); | |
3433 | defsubr (&Sautoload); | |
3434 | defsubr (&Seval); | |
3435 | defsubr (&Sapply); | |
3436 | defsubr (&Sfuncall); | |
ff936e53 SM |
3437 | defsubr (&Srun_hooks); |
3438 | defsubr (&Srun_hook_with_args); | |
3439 | defsubr (&Srun_hook_with_args_until_success); | |
3440 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3441 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3442 | defsubr (&Sbacktrace_debug); |
3443 | defsubr (&Sbacktrace); | |
3444 | defsubr (&Sbacktrace_frame); | |
3445 | } |