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db9f0278 | 1 | /* Evaluator for GNU Emacs Lisp interpreter. |
f4cfd81a | 2 | Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1999, 2000, 2001, |
76b6f707 | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
8cabe764 | 4 | Free Software Foundation, Inc. |
db9f0278 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
db9f0278 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
db9f0278 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
db9f0278 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
d7306fe6 | 23 | #include <setjmp.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 | 29 | |
b70e1a2b SM |
30 | #if HAVE_X_WINDOWS |
31 | #include "xterm.h" | |
32 | #endif | |
33 | ||
db9f0278 JB |
34 | /* This definition is duplicated in alloc.c and keyboard.c */ |
35 | /* Putting it in lisp.h makes cc bomb out! */ | |
36 | ||
37 | struct backtrace | |
4c576a83 GM |
38 | { |
39 | struct backtrace *next; | |
40 | Lisp_Object *function; | |
41 | Lisp_Object *args; /* Points to vector of args. */ | |
42 | int nargs; /* Length of vector. | |
daa37602 JB |
43 | If nargs is UNEVALLED, args points to slot holding |
44 | list of unevalled args */ | |
4c576a83 GM |
45 | char evalargs; |
46 | /* Nonzero means call value of debugger when done with this operation. */ | |
47 | char debug_on_exit; | |
48 | }; | |
db9f0278 JB |
49 | |
50 | struct backtrace *backtrace_list; | |
51 | ||
db9f0278 JB |
52 | struct catchtag *catchlist; |
53 | ||
15934ffa RS |
54 | #ifdef DEBUG_GCPRO |
55 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
56 | int gcpro_level; | |
57 | #endif | |
58 | ||
6fd797f5 | 59 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
ad236261 | 60 | Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag; |
db9f0278 JB |
61 | Lisp_Object Qand_rest, Qand_optional; |
62 | Lisp_Object Qdebug_on_error; | |
d6edd563 | 63 | Lisp_Object Qdeclare; |
f01cbfdd | 64 | Lisp_Object Qdebug; |
2b9aa051 | 65 | extern Lisp_Object Qinteractive_form; |
db9f0278 | 66 | |
6e6e9f08 RS |
67 | /* This holds either the symbol `run-hooks' or nil. |
68 | It is nil at an early stage of startup, and when Emacs | |
69 | is shutting down. */ | |
4c576a83 | 70 | |
db9f0278 JB |
71 | Lisp_Object Vrun_hooks; |
72 | ||
73 | /* Non-nil means record all fset's and provide's, to be undone | |
74 | if the file being autoloaded is not fully loaded. | |
75 | They are recorded by being consed onto the front of Vautoload_queue: | |
47b82df9 | 76 | (FUN . ODEF) for a defun, (0 . OFEATURES) for a provide. */ |
db9f0278 JB |
77 | |
78 | Lisp_Object Vautoload_queue; | |
79 | ||
80 | /* Current number of specbindings allocated in specpdl. */ | |
4c576a83 | 81 | |
db9f0278 JB |
82 | int specpdl_size; |
83 | ||
84 | /* Pointer to beginning of specpdl. */ | |
4c576a83 | 85 | |
db9f0278 JB |
86 | struct specbinding *specpdl; |
87 | ||
88 | /* Pointer to first unused element in specpdl. */ | |
4c576a83 | 89 | |
ab837828 | 90 | struct specbinding *specpdl_ptr; |
db9f0278 JB |
91 | |
92 | /* Maximum size allowed for specpdl allocation */ | |
4c576a83 | 93 | |
31ade731 | 94 | EMACS_INT max_specpdl_size; |
db9f0278 JB |
95 | |
96 | /* Depth in Lisp evaluations and function calls. */ | |
4c576a83 | 97 | |
db9f0278 JB |
98 | int lisp_eval_depth; |
99 | ||
100 | /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
4c576a83 | 101 | |
31ade731 | 102 | EMACS_INT max_lisp_eval_depth; |
db9f0278 JB |
103 | |
104 | /* Nonzero means enter debugger before next function call */ | |
4c576a83 | 105 | |
db9f0278 JB |
106 | int debug_on_next_call; |
107 | ||
1b1acc13 | 108 | /* Non-zero means debugger may continue. This is zero when the |
556d7314 GM |
109 | debugger is called during redisplay, where it might not be safe to |
110 | continue the interrupted redisplay. */ | |
111 | ||
112 | int debugger_may_continue; | |
113 | ||
128c0f66 | 114 | /* List of conditions (non-nil atom means all) which cause a backtrace |
4de86b16 | 115 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 116 | |
128c0f66 | 117 | Lisp_Object Vstack_trace_on_error; |
db9f0278 | 118 | |
128c0f66 | 119 | /* List of conditions (non-nil atom means all) which enter the debugger |
4de86b16 | 120 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 121 | |
128c0f66 | 122 | Lisp_Object Vdebug_on_error; |
db9f0278 | 123 | |
fc950e09 | 124 | /* List of conditions and regexps specifying error messages which |
1b1acc13 | 125 | do not enter the debugger even if Vdebug_on_error says they should. */ |
4c576a83 | 126 | |
fc950e09 KH |
127 | Lisp_Object Vdebug_ignored_errors; |
128 | ||
61ede770 | 129 | /* Non-nil means call the debugger even if the error will be handled. */ |
4c576a83 | 130 | |
57a6e758 | 131 | Lisp_Object Vdebug_on_signal; |
61ede770 RS |
132 | |
133 | /* Hook for edebug to use. */ | |
4c576a83 | 134 | |
61ede770 RS |
135 | Lisp_Object Vsignal_hook_function; |
136 | ||
db9f0278 | 137 | /* Nonzero means enter debugger if a quit signal |
128c0f66 | 138 | is handled by the command loop's error handler. */ |
4c576a83 | 139 | |
db9f0278 JB |
140 | int debug_on_quit; |
141 | ||
be857679 | 142 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 143 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 144 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
145 | know that the debugger itself has an error, and we should just |
146 | signal the error instead of entering an infinite loop of debugger | |
147 | invocations. */ | |
4c576a83 | 148 | |
82da7701 | 149 | int when_entered_debugger; |
db9f0278 JB |
150 | |
151 | Lisp_Object Vdebugger; | |
152 | ||
a2ff3819 GM |
153 | /* The function from which the last `signal' was called. Set in |
154 | Fsignal. */ | |
155 | ||
156 | Lisp_Object Vsignaling_function; | |
157 | ||
4c576a83 GM |
158 | /* Set to non-zero while processing X events. Checked in Feval to |
159 | make sure the Lisp interpreter isn't called from a signal handler, | |
160 | which is unsafe because the interpreter isn't reentrant. */ | |
161 | ||
162 | int handling_signal; | |
163 | ||
d6edd563 GM |
164 | /* Function to process declarations in defmacro forms. */ |
165 | ||
166 | Lisp_Object Vmacro_declaration_function; | |
167 | ||
873759d5 | 168 | extern Lisp_Object Qrisky_local_variable; |
d6edd563 | 169 | |
1283140e RS |
170 | extern Lisp_Object Qfunction; |
171 | ||
2901f1d1 | 172 | static Lisp_Object funcall_lambda P_ ((Lisp_Object, int, Lisp_Object*)); |
2381d38d | 173 | static void unwind_to_catch P_ ((struct catchtag *, Lisp_Object)) NO_RETURN; |
eaa1e5ed EZ |
174 | |
175 | #if __GNUC__ | |
176 | /* "gcc -O3" enables automatic function inlining, which optimizes out | |
177 | the arguments for the invocations of these functions, whereas they | |
178 | expect these values on the stack. */ | |
179 | Lisp_Object apply1 () __attribute__((noinline)); | |
180 | Lisp_Object call2 () __attribute__((noinline)); | |
181 | #endif | |
873759d5 | 182 | \f |
dfcf069d | 183 | void |
db9f0278 JB |
184 | init_eval_once () |
185 | { | |
186 | specpdl_size = 50; | |
716acfce | 187 | specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding)); |
270e8074 | 188 | specpdl_ptr = specpdl; |
6588243d | 189 | /* Don't forget to update docs (lispref node "Local Variables"). */ |
a4547405 | 190 | max_specpdl_size = 1000; |
f983eb8a | 191 | max_lisp_eval_depth = 500; |
34d470ba RS |
192 | |
193 | Vrun_hooks = Qnil; | |
db9f0278 JB |
194 | } |
195 | ||
dfcf069d | 196 | void |
db9f0278 JB |
197 | init_eval () |
198 | { | |
199 | specpdl_ptr = specpdl; | |
200 | catchlist = 0; | |
201 | handlerlist = 0; | |
202 | backtrace_list = 0; | |
203 | Vquit_flag = Qnil; | |
204 | debug_on_next_call = 0; | |
205 | lisp_eval_depth = 0; | |
87e21fbd | 206 | #ifdef DEBUG_GCPRO |
15934ffa | 207 | gcpro_level = 0; |
87e21fbd | 208 | #endif |
be857679 | 209 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 210 | when_entered_debugger = -1; |
db9f0278 JB |
211 | } |
212 | ||
9f5903bb RS |
213 | /* unwind-protect function used by call_debugger. */ |
214 | ||
215 | static Lisp_Object | |
216 | restore_stack_limits (data) | |
217 | Lisp_Object data; | |
218 | { | |
219 | max_specpdl_size = XINT (XCAR (data)); | |
220 | max_lisp_eval_depth = XINT (XCDR (data)); | |
538f78c3 | 221 | return Qnil; |
9f5903bb RS |
222 | } |
223 | ||
224 | /* Call the Lisp debugger, giving it argument ARG. */ | |
225 | ||
db9f0278 JB |
226 | Lisp_Object |
227 | call_debugger (arg) | |
228 | Lisp_Object arg; | |
229 | { | |
3648c842 | 230 | int debug_while_redisplaying; |
aed13378 | 231 | int count = SPECPDL_INDEX (); |
3648c842 | 232 | Lisp_Object val; |
9f5903bb | 233 | int old_max = max_specpdl_size; |
177c0ea7 | 234 | |
9f5903bb RS |
235 | /* Temporarily bump up the stack limits, |
236 | so the debugger won't run out of stack. */ | |
177c0ea7 | 237 | |
9f5903bb RS |
238 | max_specpdl_size += 1; |
239 | record_unwind_protect (restore_stack_limits, | |
240 | Fcons (make_number (old_max), | |
241 | make_number (max_lisp_eval_depth))); | |
242 | max_specpdl_size = old_max; | |
243 | ||
244 | if (lisp_eval_depth + 40 > max_lisp_eval_depth) | |
245 | max_lisp_eval_depth = lisp_eval_depth + 40; | |
246 | ||
247 | if (SPECPDL_INDEX () + 100 > max_specpdl_size) | |
248 | max_specpdl_size = SPECPDL_INDEX () + 100; | |
177c0ea7 | 249 | |
d148e14d | 250 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
251 | if (display_hourglass_p) |
252 | cancel_hourglass (); | |
237c23b0 GM |
253 | #endif |
254 | ||
db9f0278 | 255 | debug_on_next_call = 0; |
be857679 | 256 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
257 | |
258 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
259 | displayed if the debugger is invoked during redisplay. */ | |
260 | debug_while_redisplaying = redisplaying_p; | |
261 | redisplaying_p = 0; | |
556d7314 GM |
262 | specbind (intern ("debugger-may-continue"), |
263 | debug_while_redisplaying ? Qnil : Qt); | |
8efb6cc7 | 264 | specbind (Qinhibit_redisplay, Qnil); |
9f5903bb | 265 | specbind (Qdebug_on_error, Qnil); |
9db6f6b4 GM |
266 | |
267 | #if 0 /* Binding this prevents execution of Lisp code during | |
268 | redisplay, which necessarily leads to display problems. */ | |
8efb6cc7 | 269 | specbind (Qinhibit_eval_during_redisplay, Qt); |
9db6f6b4 | 270 | #endif |
177c0ea7 | 271 | |
3648c842 GM |
272 | val = apply1 (Vdebugger, arg); |
273 | ||
274 | /* Interrupting redisplay and resuming it later is not safe under | |
275 | all circumstances. So, when the debugger returns, abort the | |
1b1acc13 | 276 | interrupted redisplay by going back to the top-level. */ |
3648c842 GM |
277 | if (debug_while_redisplaying) |
278 | Ftop_level (); | |
279 | ||
556d7314 | 280 | return unbind_to (count, val); |
db9f0278 JB |
281 | } |
282 | ||
dfcf069d | 283 | void |
db9f0278 JB |
284 | do_debug_on_call (code) |
285 | Lisp_Object code; | |
286 | { | |
287 | debug_on_next_call = 0; | |
288 | backtrace_list->debug_on_exit = 1; | |
289 | call_debugger (Fcons (code, Qnil)); | |
290 | } | |
291 | \f | |
292 | /* NOTE!!! Every function that can call EVAL must protect its args | |
293 | and temporaries from garbage collection while it needs them. | |
294 | The definition of `For' shows what you have to do. */ | |
295 | ||
296 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
297 | doc: /* Eval args until one of them yields non-nil, then return that value. |
298 | The remaining args are not evalled at all. | |
299 | If all args return nil, return nil. | |
533eb34b | 300 | usage: (or CONDITIONS...) */) |
9dbc9081 | 301 | (args) |
db9f0278 JB |
302 | Lisp_Object args; |
303 | { | |
e509f168 | 304 | register Lisp_Object val = Qnil; |
db9f0278 JB |
305 | struct gcpro gcpro1; |
306 | ||
e509f168 | 307 | GCPRO1 (args); |
db9f0278 | 308 | |
e509f168 | 309 | while (CONSP (args)) |
db9f0278 | 310 | { |
e509f168 | 311 | val = Feval (XCAR (args)); |
265a9e55 | 312 | if (!NILP (val)) |
db9f0278 | 313 | break; |
e509f168 | 314 | args = XCDR (args); |
db9f0278 | 315 | } |
db9f0278 JB |
316 | |
317 | UNGCPRO; | |
318 | return val; | |
319 | } | |
320 | ||
321 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
b8de5714 | 322 | doc: /* Eval args until one of them yields nil, then return nil. |
9dbc9081 PJ |
323 | The remaining args are not evalled at all. |
324 | If no arg yields nil, return the last arg's value. | |
533eb34b | 325 | usage: (and CONDITIONS...) */) |
9dbc9081 | 326 | (args) |
db9f0278 JB |
327 | Lisp_Object args; |
328 | { | |
e509f168 | 329 | register Lisp_Object val = Qt; |
db9f0278 JB |
330 | struct gcpro gcpro1; |
331 | ||
e509f168 | 332 | GCPRO1 (args); |
db9f0278 | 333 | |
e509f168 | 334 | while (CONSP (args)) |
db9f0278 | 335 | { |
e509f168 | 336 | val = Feval (XCAR (args)); |
265a9e55 | 337 | if (NILP (val)) |
db9f0278 | 338 | break; |
e509f168 | 339 | args = XCDR (args); |
db9f0278 | 340 | } |
db9f0278 JB |
341 | |
342 | UNGCPRO; | |
343 | return val; | |
344 | } | |
345 | ||
346 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
b8de5714 | 347 | doc: /* If COND yields non-nil, do THEN, else do ELSE... |
9dbc9081 PJ |
348 | Returns the value of THEN or the value of the last of the ELSE's. |
349 | THEN must be one expression, but ELSE... can be zero or more expressions. | |
350 | If COND yields nil, and there are no ELSE's, the value is nil. | |
7a25dc6d | 351 | usage: (if COND THEN ELSE...) */) |
9dbc9081 | 352 | (args) |
db9f0278 JB |
353 | Lisp_Object args; |
354 | { | |
355 | register Lisp_Object cond; | |
356 | struct gcpro gcpro1; | |
357 | ||
358 | GCPRO1 (args); | |
359 | cond = Feval (Fcar (args)); | |
360 | UNGCPRO; | |
361 | ||
265a9e55 | 362 | if (!NILP (cond)) |
db9f0278 JB |
363 | return Feval (Fcar (Fcdr (args))); |
364 | return Fprogn (Fcdr (Fcdr (args))); | |
365 | } | |
366 | ||
367 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
368 | doc: /* Try each clause until one succeeds. |
369 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated | |
370 | and, if the value is non-nil, this clause succeeds: | |
371 | then the expressions in BODY are evaluated and the last one's | |
372 | value is the value of the cond-form. | |
373 | If no clause succeeds, cond returns nil. | |
374 | If a clause has one element, as in (CONDITION), | |
375 | CONDITION's value if non-nil is returned from the cond-form. | |
7a25dc6d | 376 | usage: (cond CLAUSES...) */) |
9dbc9081 | 377 | (args) |
db9f0278 JB |
378 | Lisp_Object args; |
379 | { | |
380 | register Lisp_Object clause, val; | |
381 | struct gcpro gcpro1; | |
382 | ||
383 | val = Qnil; | |
384 | GCPRO1 (args); | |
265a9e55 | 385 | while (!NILP (args)) |
db9f0278 JB |
386 | { |
387 | clause = Fcar (args); | |
388 | val = Feval (Fcar (clause)); | |
265a9e55 | 389 | if (!NILP (val)) |
db9f0278 | 390 | { |
03699b14 KR |
391 | if (!EQ (XCDR (clause), Qnil)) |
392 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
393 | break; |
394 | } | |
03699b14 | 395 | args = XCDR (args); |
db9f0278 JB |
396 | } |
397 | UNGCPRO; | |
398 | ||
399 | return val; | |
400 | } | |
401 | ||
402 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
9dbc9081 | 403 | doc: /* Eval BODY forms sequentially and return value of last one. |
5b4a1f50 | 404 | usage: (progn BODY...) */) |
9dbc9081 | 405 | (args) |
db9f0278 JB |
406 | Lisp_Object args; |
407 | { | |
e509f168 | 408 | register Lisp_Object val = Qnil; |
db9f0278 JB |
409 | struct gcpro gcpro1; |
410 | ||
e509f168 | 411 | GCPRO1 (args); |
db9f0278 | 412 | |
e509f168 | 413 | while (CONSP (args)) |
db9f0278 | 414 | { |
e509f168 SM |
415 | val = Feval (XCAR (args)); |
416 | args = XCDR (args); | |
db9f0278 | 417 | } |
db9f0278 JB |
418 | |
419 | UNGCPRO; | |
420 | return val; | |
421 | } | |
422 | ||
423 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
bdee2ef3 | 424 | doc: /* Eval FIRST and BODY sequentially; return value from FIRST. |
9dbc9081 PJ |
425 | The value of FIRST is saved during the evaluation of the remaining args, |
426 | whose values are discarded. | |
7a25dc6d | 427 | usage: (prog1 FIRST BODY...) */) |
9dbc9081 | 428 | (args) |
db9f0278 JB |
429 | Lisp_Object args; |
430 | { | |
431 | Lisp_Object val; | |
432 | register Lisp_Object args_left; | |
433 | struct gcpro gcpro1, gcpro2; | |
434 | register int argnum = 0; | |
435 | ||
9ac66b45 | 436 | if (NILP (args)) |
db9f0278 JB |
437 | return Qnil; |
438 | ||
439 | args_left = args; | |
440 | val = Qnil; | |
441 | GCPRO2 (args, val); | |
442 | ||
443 | do | |
444 | { | |
445 | if (!(argnum++)) | |
446 | val = Feval (Fcar (args_left)); | |
447 | else | |
448 | Feval (Fcar (args_left)); | |
449 | args_left = Fcdr (args_left); | |
450 | } | |
265a9e55 | 451 | while (!NILP(args_left)); |
db9f0278 JB |
452 | |
453 | UNGCPRO; | |
454 | return val; | |
455 | } | |
456 | ||
457 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
bdee2ef3 | 458 | doc: /* Eval FORM1, FORM2 and BODY sequentially; return value from FORM2. |
82fc29a1 JB |
459 | The value of FORM2 is saved during the evaluation of the |
460 | remaining args, whose values are discarded. | |
461 | usage: (prog2 FORM1 FORM2 BODY...) */) | |
9dbc9081 | 462 | (args) |
db9f0278 JB |
463 | Lisp_Object args; |
464 | { | |
465 | Lisp_Object val; | |
466 | register Lisp_Object args_left; | |
467 | struct gcpro gcpro1, gcpro2; | |
468 | register int argnum = -1; | |
469 | ||
470 | val = Qnil; | |
471 | ||
87d238ba | 472 | if (NILP (args)) |
db9f0278 JB |
473 | return Qnil; |
474 | ||
475 | args_left = args; | |
476 | val = Qnil; | |
477 | GCPRO2 (args, val); | |
478 | ||
479 | do | |
480 | { | |
481 | if (!(argnum++)) | |
482 | val = Feval (Fcar (args_left)); | |
483 | else | |
484 | Feval (Fcar (args_left)); | |
485 | args_left = Fcdr (args_left); | |
486 | } | |
87d238ba | 487 | while (!NILP (args_left)); |
db9f0278 JB |
488 | |
489 | UNGCPRO; | |
490 | return val; | |
491 | } | |
492 | ||
493 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
494 | doc: /* Set each SYM to the value of its VAL. |
495 | The symbols SYM are variables; they are literal (not evaluated). | |
496 | The values VAL are expressions; they are evaluated. | |
497 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
498 | The second VAL is not computed until after the first SYM is set, and so on; | |
499 | each VAL can use the new value of variables set earlier in the `setq'. | |
500 | The return value of the `setq' form is the value of the last VAL. | |
819586b2 | 501 | usage: (setq [SYM VAL]...) */) |
9dbc9081 | 502 | (args) |
db9f0278 JB |
503 | Lisp_Object args; |
504 | { | |
505 | register Lisp_Object args_left; | |
506 | register Lisp_Object val, sym; | |
507 | struct gcpro gcpro1; | |
508 | ||
1283140e | 509 | if (NILP (args)) |
db9f0278 JB |
510 | return Qnil; |
511 | ||
512 | args_left = args; | |
513 | GCPRO1 (args); | |
514 | ||
515 | do | |
516 | { | |
517 | val = Feval (Fcar (Fcdr (args_left))); | |
518 | sym = Fcar (args_left); | |
519 | Fset (sym, val); | |
520 | args_left = Fcdr (Fcdr (args_left)); | |
521 | } | |
265a9e55 | 522 | while (!NILP(args_left)); |
db9f0278 JB |
523 | |
524 | UNGCPRO; | |
525 | return val; | |
526 | } | |
177c0ea7 | 527 | |
db9f0278 | 528 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, |
9dbc9081 PJ |
529 | doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'. |
530 | usage: (quote ARG) */) | |
531 | (args) | |
db9f0278 JB |
532 | Lisp_Object args; |
533 | { | |
1283140e RS |
534 | if (!NILP (Fcdr (args))) |
535 | xsignal2 (Qwrong_number_of_arguments, Qquote, Flength (args)); | |
db9f0278 JB |
536 | return Fcar (args); |
537 | } | |
177c0ea7 | 538 | |
db9f0278 | 539 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, |
9dbc9081 PJ |
540 | doc: /* Like `quote', but preferred for objects which are functions. |
541 | In byte compilation, `function' causes its argument to be compiled. | |
542 | `quote' cannot do that. | |
543 | usage: (function ARG) */) | |
544 | (args) | |
db9f0278 JB |
545 | Lisp_Object args; |
546 | { | |
1283140e RS |
547 | if (!NILP (Fcdr (args))) |
548 | xsignal2 (Qwrong_number_of_arguments, Qfunction, Flength (args)); | |
db9f0278 JB |
549 | return Fcar (args); |
550 | } | |
551 | ||
e0f331ab | 552 | |
db9f0278 | 553 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, |
84b17ab0 | 554 | doc: /* Return t if the containing function was run directly by user input. |
82fc29a1 JB |
555 | This means that the function was called with `call-interactively' |
556 | \(which includes being called as the binding of a key) | |
84b17ab0 | 557 | and input is currently coming from the keyboard (not a keyboard macro), |
c63df42b RS |
558 | and Emacs is not running in batch mode (`noninteractive' is nil). |
559 | ||
560 | The only known proper use of `interactive-p' is in deciding whether to | |
561 | display a helpful message, or how to display it. If you're thinking | |
562 | of using it for any other purpose, it is quite likely that you're | |
563 | making a mistake. Think: what do you want to do when the command is | |
564 | called from a keyboard macro? | |
565 | ||
84b17ab0 CY |
566 | To test whether your function was called with `call-interactively', |
567 | either (i) add an extra optional argument and give it an `interactive' | |
568 | spec that specifies non-nil unconditionally (such as \"p\"); or (ii) | |
569 | use `called-interactively-p'. */) | |
9dbc9081 | 570 | () |
db9f0278 | 571 | { |
c63df42b | 572 | return (INTERACTIVE && interactive_p (1)) ? Qt : Qnil; |
e0f331ab GM |
573 | } |
574 | ||
575 | ||
9d28c33e | 576 | DEFUN ("called-interactively-p", Fcalled_interactively_p, Scalled_interactively_p, 0, 1, 0, |
84b17ab0 | 577 | doc: /* Return t if the containing function was called by `call-interactively'. |
9d28c33e SM |
578 | If KIND is `interactive', then only return t if the call was made |
579 | interactively by the user, i.e. not in `noninteractive' mode nor | |
580 | when `executing-kbd-macro'. | |
581 | If KIND is `any', on the other hand, it will return t for any kind of | |
582 | interactive call, including being called as the binding of a key, or | |
583 | from a keyboard macro, or in `noninteractive' mode. | |
584 | ||
585 | The only known proper use of `interactive' for KIND is in deciding | |
586 | whether to display a helpful message, or how to display it. If you're | |
587 | thinking of using it for any other purpose, it is quite likely that | |
588 | you're making a mistake. Think: what do you want to do when the | |
589 | command is called from a keyboard macro? | |
84b17ab0 CY |
590 | |
591 | This function is meant for implementing advice and other | |
592 | function-modifying features. Instead of using this, it is sometimes | |
593 | cleaner to give your function an extra optional argument whose | |
594 | `interactive' spec specifies non-nil unconditionally (\"p\" is a good | |
9d28c33e SM |
595 | way to do this), or via (not (or executing-kbd-macro noninteractive)). */) |
596 | (kind) | |
597 | Lisp_Object kind; | |
c63df42b | 598 | { |
9d28c33e SM |
599 | return ((INTERACTIVE || !EQ (kind, intern ("interactive"))) |
600 | && interactive_p (1)) ? Qt : Qnil; | |
c63df42b RS |
601 | } |
602 | ||
603 | ||
604 | /* Return 1 if function in which this appears was called using | |
605 | call-interactively. | |
e0f331ab GM |
606 | |
607 | EXCLUDE_SUBRS_P non-zero means always return 0 if the function | |
608 | called is a built-in. */ | |
609 | ||
610 | int | |
611 | interactive_p (exclude_subrs_p) | |
612 | int exclude_subrs_p; | |
613 | { | |
614 | struct backtrace *btp; | |
615 | Lisp_Object fun; | |
db9f0278 | 616 | |
db9f0278 | 617 | btp = backtrace_list; |
daa37602 JB |
618 | |
619 | /* If this isn't a byte-compiled function, there may be a frame at | |
e0f331ab | 620 | the top for Finteractive_p. If so, skip it. */ |
a7f96a35 | 621 | fun = Findirect_function (*btp->function, Qnil); |
0b31741c RS |
622 | if (SUBRP (fun) && (XSUBR (fun) == &Sinteractive_p |
623 | || XSUBR (fun) == &Scalled_interactively_p)) | |
db9f0278 | 624 | btp = btp->next; |
daa37602 JB |
625 | |
626 | /* If we're running an Emacs 18-style byte-compiled function, there | |
4402a9ed RS |
627 | may be a frame for Fbytecode at the top level. In any version of |
628 | Emacs there can be Fbytecode frames for subexpressions evaluated | |
629 | inside catch and condition-case. Skip past them. | |
daa37602 | 630 | |
4402a9ed | 631 | If this isn't a byte-compiled function, then we may now be |
daa37602 | 632 | looking at several frames for special forms. Skip past them. */ |
4402a9ed RS |
633 | while (btp |
634 | && (EQ (*btp->function, Qbytecode) | |
635 | || btp->nargs == UNEVALLED)) | |
a6e3fa71 JB |
636 | btp = btp->next; |
637 | ||
daa37602 JB |
638 | /* btp now points at the frame of the innermost function that isn't |
639 | a special form, ignoring frames for Finteractive_p and/or | |
640 | Fbytecode at the top. If this frame is for a built-in function | |
641 | (such as load or eval-region) return nil. */ | |
a7f96a35 | 642 | fun = Findirect_function (*btp->function, Qnil); |
e0f331ab GM |
643 | if (exclude_subrs_p && SUBRP (fun)) |
644 | return 0; | |
177c0ea7 | 645 | |
db9f0278 JB |
646 | /* btp points to the frame of a Lisp function that called interactive-p. |
647 | Return t if that function was called interactively. */ | |
648 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
e0f331ab GM |
649 | return 1; |
650 | return 0; | |
db9f0278 JB |
651 | } |
652 | ||
e0f331ab | 653 | |
db9f0278 | 654 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, |
9dbc9081 PJ |
655 | doc: /* Define NAME as a function. |
656 | The definition is (lambda ARGLIST [DOCSTRING] BODY...). | |
657 | See also the function `interactive'. | |
7a25dc6d | 658 | usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */) |
9dbc9081 | 659 | (args) |
db9f0278 JB |
660 | Lisp_Object args; |
661 | { | |
662 | register Lisp_Object fn_name; | |
663 | register Lisp_Object defn; | |
664 | ||
665 | fn_name = Fcar (args); | |
6992a868 | 666 | CHECK_SYMBOL (fn_name); |
db9f0278 | 667 | defn = Fcons (Qlambda, Fcdr (args)); |
265a9e55 | 668 | if (!NILP (Vpurify_flag)) |
db9f0278 | 669 | defn = Fpurecopy (defn); |
f58e9f8c RS |
670 | if (CONSP (XSYMBOL (fn_name)->function) |
671 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
672 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 673 | Ffset (fn_name, defn); |
6fd797f5 | 674 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
675 | return fn_name; |
676 | } | |
677 | ||
678 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
9dbc9081 | 679 | doc: /* Define NAME as a macro. |
0654d6e3 RS |
680 | The actual definition looks like |
681 | (macro lambda ARGLIST [DOCSTRING] [DECL] BODY...). | |
9dbc9081 PJ |
682 | When the macro is called, as in (NAME ARGS...), |
683 | the function (lambda ARGLIST BODY...) is applied to | |
684 | the list ARGS... as it appears in the expression, | |
685 | and the result should be a form to be evaluated instead of the original. | |
0654d6e3 RS |
686 | |
687 | DECL is a declaration, optional, which can specify how to indent | |
4ba50634 JPW |
688 | calls to this macro, how Edebug should handle it, and which argument |
689 | should be treated as documentation. It looks like this: | |
0654d6e3 RS |
690 | (declare SPECS...) |
691 | The elements can look like this: | |
692 | (indent INDENT) | |
693 | Set NAME's `lisp-indent-function' property to INDENT. | |
694 | ||
e509f168 | 695 | (debug DEBUG) |
0654d6e3 | 696 | Set NAME's `edebug-form-spec' property to DEBUG. (This is |
7d5c86e5 | 697 | equivalent to writing a `def-edebug-spec' for the macro.) |
4ba50634 JPW |
698 | |
699 | (doc-string ELT) | |
700 | Set NAME's `doc-string-elt' property to ELT. | |
701 | ||
0654d6e3 | 702 | usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */) |
9dbc9081 | 703 | (args) |
db9f0278 JB |
704 | Lisp_Object args; |
705 | { | |
706 | register Lisp_Object fn_name; | |
707 | register Lisp_Object defn; | |
d6edd563 | 708 | Lisp_Object lambda_list, doc, tail; |
db9f0278 JB |
709 | |
710 | fn_name = Fcar (args); | |
8e975df9 | 711 | CHECK_SYMBOL (fn_name); |
d6edd563 GM |
712 | lambda_list = Fcar (Fcdr (args)); |
713 | tail = Fcdr (Fcdr (args)); | |
714 | ||
715 | doc = Qnil; | |
716 | if (STRINGP (Fcar (tail))) | |
717 | { | |
e509f168 SM |
718 | doc = XCAR (tail); |
719 | tail = XCDR (tail); | |
d6edd563 GM |
720 | } |
721 | ||
722 | while (CONSP (Fcar (tail)) | |
723 | && EQ (Fcar (Fcar (tail)), Qdeclare)) | |
724 | { | |
725 | if (!NILP (Vmacro_declaration_function)) | |
726 | { | |
727 | struct gcpro gcpro1; | |
728 | GCPRO1 (args); | |
729 | call2 (Vmacro_declaration_function, fn_name, Fcar (tail)); | |
730 | UNGCPRO; | |
731 | } | |
177c0ea7 | 732 | |
d6edd563 GM |
733 | tail = Fcdr (tail); |
734 | } | |
735 | ||
736 | if (NILP (doc)) | |
737 | tail = Fcons (lambda_list, tail); | |
738 | else | |
739 | tail = Fcons (lambda_list, Fcons (doc, tail)); | |
740 | defn = Fcons (Qmacro, Fcons (Qlambda, tail)); | |
177c0ea7 | 741 | |
265a9e55 | 742 | if (!NILP (Vpurify_flag)) |
db9f0278 | 743 | defn = Fpurecopy (defn); |
f58e9f8c RS |
744 | if (CONSP (XSYMBOL (fn_name)->function) |
745 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
746 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 747 | Ffset (fn_name, defn); |
6fd797f5 | 748 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
749 | return fn_name; |
750 | } | |
751 | ||
19cebf5a | 752 | |
1848d15d | 753 | DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0, |
4a9308b8 | 754 | doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE. |
e102f0d8 | 755 | Aliased variables always have the same value; setting one sets the other. |
4a9308b8 | 756 | Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is |
dd60787c GM |
757 | omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE, |
758 | or of the variable at the end of the chain of aliases, if BASE-VARIABLE is | |
759 | itself an alias. If NEW-ALIAS is bound, and BASE-VARIABLE is not, | |
760 | then the value of BASE-VARIABLE is set to that of NEW-ALIAS. | |
4a9308b8 JB |
761 | The return value is BASE-VARIABLE. */) |
762 | (new_alias, base_variable, docstring) | |
763 | Lisp_Object new_alias, base_variable, docstring; | |
19cebf5a GM |
764 | { |
765 | struct Lisp_Symbol *sym; | |
1848d15d | 766 | |
4a9308b8 JB |
767 | CHECK_SYMBOL (new_alias); |
768 | CHECK_SYMBOL (base_variable); | |
19cebf5a | 769 | |
4a9308b8 | 770 | if (SYMBOL_CONSTANT_P (new_alias)) |
19cebf5a GM |
771 | error ("Cannot make a constant an alias"); |
772 | ||
4a9308b8 | 773 | sym = XSYMBOL (new_alias); |
dd60787c GM |
774 | /* http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00834.html |
775 | If n_a is bound, but b_v is not, set the value of b_v to n_a. | |
776 | This is for the sake of define-obsolete-variable-alias and user | |
777 | customizations. */ | |
778 | if (NILP (Fboundp (base_variable)) && !NILP (Fboundp (new_alias))) | |
779 | XSYMBOL(base_variable)->value = sym->value; | |
19cebf5a | 780 | sym->indirect_variable = 1; |
4a9308b8 JB |
781 | sym->value = base_variable; |
782 | sym->constant = SYMBOL_CONSTANT_P (base_variable); | |
783 | LOADHIST_ATTACH (new_alias); | |
1848d15d | 784 | if (!NILP (docstring)) |
4a9308b8 | 785 | Fput (new_alias, Qvariable_documentation, docstring); |
bd81fcf8 | 786 | else |
4a9308b8 | 787 | Fput (new_alias, Qvariable_documentation, Qnil); |
1848d15d | 788 | |
4a9308b8 | 789 | return base_variable; |
19cebf5a GM |
790 | } |
791 | ||
792 | ||
db9f0278 | 793 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, |
29357847 | 794 | doc: /* Define SYMBOL as a variable, and return SYMBOL. |
9dbc9081 PJ |
795 | You are not required to define a variable in order to use it, |
796 | but the definition can supply documentation and an initial value | |
797 | in a way that tags can recognize. | |
798 | ||
799 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void. | |
800 | If SYMBOL is buffer-local, its default value is what is set; | |
801 | buffer-local values are not affected. | |
802 | INITVALUE and DOCSTRING are optional. | |
803 | If DOCSTRING starts with *, this variable is identified as a user option. | |
804 | This means that M-x set-variable recognizes it. | |
805 | See also `user-variable-p'. | |
806 | If INITVALUE is missing, SYMBOL's value is not set. | |
733f68b6 LT |
807 | |
808 | If SYMBOL has a local binding, then this form affects the local | |
809 | binding. This is usually not what you want. Thus, if you need to | |
810 | load a file defining variables, with this form or with `defconst' or | |
811 | `defcustom', you should always load that file _outside_ any bindings | |
812 | for these variables. \(`defconst' and `defcustom' behave similarly in | |
813 | this respect.) | |
2df5238c | 814 | usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */) |
9dbc9081 | 815 | (args) |
db9f0278 JB |
816 | Lisp_Object args; |
817 | { | |
a42ba017 | 818 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
819 | |
820 | sym = Fcar (args); | |
a42ba017 RS |
821 | tail = Fcdr (args); |
822 | if (!NILP (Fcdr (Fcdr (tail)))) | |
921baa95 | 823 | error ("Too many arguments"); |
a42ba017 | 824 | |
33568849 | 825 | tem = Fdefault_boundp (sym); |
a42ba017 | 826 | if (!NILP (tail)) |
db9f0278 | 827 | { |
1c9916a1 SM |
828 | if (SYMBOL_CONSTANT_P (sym)) |
829 | { | |
830 | /* For upward compatibility, allow (defvar :foo (quote :foo)). */ | |
831 | Lisp_Object tem = Fcar (tail); | |
832 | if (! (CONSP (tem) | |
833 | && EQ (XCAR (tem), Qquote) | |
834 | && CONSP (XCDR (tem)) | |
835 | && EQ (XCAR (XCDR (tem)), sym))) | |
836 | error ("Constant symbol `%s' specified in defvar", | |
837 | SDATA (SYMBOL_NAME (sym))); | |
838 | } | |
839 | ||
265a9e55 | 840 | if (NILP (tem)) |
33568849 | 841 | Fset_default (sym, Feval (Fcar (tail))); |
d0bce91e SM |
842 | else |
843 | { /* Check if there is really a global binding rather than just a let | |
844 | binding that shadows the global unboundness of the var. */ | |
b28d0d9a | 845 | volatile struct specbinding *pdl = specpdl_ptr; |
d0bce91e SM |
846 | while (--pdl >= specpdl) |
847 | { | |
848 | if (EQ (pdl->symbol, sym) && !pdl->func | |
849 | && EQ (pdl->old_value, Qunbound)) | |
850 | { | |
851 | message_with_string ("Warning: defvar ignored because %s is let-bound", | |
852 | SYMBOL_NAME (sym), 1); | |
853 | break; | |
854 | } | |
855 | } | |
856 | } | |
33568849 | 857 | tail = Fcdr (tail); |
e509f168 SM |
858 | tem = Fcar (tail); |
859 | if (!NILP (tem)) | |
33568849 | 860 | { |
33568849 SM |
861 | if (!NILP (Vpurify_flag)) |
862 | tem = Fpurecopy (tem); | |
863 | Fput (sym, Qvariable_documentation, tem); | |
864 | } | |
6fd797f5 | 865 | LOADHIST_ATTACH (sym); |
db9f0278 | 866 | } |
33568849 | 867 | else |
d7c1d0fc RS |
868 | /* Simple (defvar <var>) should not count as a definition at all. |
869 | It could get in the way of other definitions, and unloading this | |
870 | package could try to make the variable unbound. */ | |
addf35fd AS |
871 | ; |
872 | ||
db9f0278 JB |
873 | return sym; |
874 | } | |
875 | ||
876 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
877 | doc: /* Define SYMBOL as a constant variable. |
878 | The intent is that neither programs nor users should ever change this value. | |
879 | Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
880 | If SYMBOL is buffer-local, its default value is what is set; | |
881 | buffer-local values are not affected. | |
882 | DOCSTRING is optional. | |
733f68b6 LT |
883 | |
884 | If SYMBOL has a local binding, then this form sets the local binding's | |
885 | value. However, you should normally not make local bindings for | |
886 | variables defined with this form. | |
7a25dc6d | 887 | usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */) |
9dbc9081 | 888 | (args) |
db9f0278 JB |
889 | Lisp_Object args; |
890 | { | |
891 | register Lisp_Object sym, tem; | |
892 | ||
893 | sym = Fcar (args); | |
a42ba017 | 894 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
921baa95 | 895 | error ("Too many arguments"); |
a42ba017 | 896 | |
1182a7cb DL |
897 | tem = Feval (Fcar (Fcdr (args))); |
898 | if (!NILP (Vpurify_flag)) | |
899 | tem = Fpurecopy (tem); | |
900 | Fset_default (sym, tem); | |
db9f0278 | 901 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 902 | if (!NILP (tem)) |
db9f0278 | 903 | { |
265a9e55 | 904 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
905 | tem = Fpurecopy (tem); |
906 | Fput (sym, Qvariable_documentation, tem); | |
907 | } | |
873759d5 | 908 | Fput (sym, Qrisky_local_variable, Qt); |
6fd797f5 | 909 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
910 | return sym; |
911 | } | |
912 | ||
606cdb89 JB |
913 | /* Error handler used in Fuser_variable_p. */ |
914 | static Lisp_Object | |
915 | user_variable_p_eh (ignore) | |
916 | Lisp_Object ignore; | |
917 | { | |
918 | return Qnil; | |
919 | } | |
920 | ||
40a69fac SM |
921 | static Lisp_Object |
922 | lisp_indirect_variable (Lisp_Object sym) | |
923 | { | |
924 | XSETSYMBOL (sym, indirect_variable (XSYMBOL (sym))); | |
925 | return sym; | |
926 | } | |
927 | ||
db9f0278 | 928 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, |
606cdb89 | 929 | doc: /* Return t if VARIABLE is intended to be set and modified by users. |
9dbc9081 | 930 | \(The alternative is a variable used internally in a Lisp program.) |
606cdb89 JB |
931 | A variable is a user variable if |
932 | \(1) the first character of its documentation is `*', or | |
933 | \(2) it is customizable (its property list contains a non-nil value | |
934 | of `standard-value' or `custom-autoload'), or | |
935 | \(3) it is an alias for another user variable. | |
936 | Return nil if VARIABLE is an alias and there is a loop in the | |
937 | chain of symbols. */) | |
9dbc9081 | 938 | (variable) |
db9f0278 JB |
939 | Lisp_Object variable; |
940 | { | |
941 | Lisp_Object documentation; | |
177c0ea7 | 942 | |
5e78e475 RS |
943 | if (!SYMBOLP (variable)) |
944 | return Qnil; | |
945 | ||
606cdb89 JB |
946 | /* If indirect and there's an alias loop, don't check anything else. */ |
947 | if (XSYMBOL (variable)->indirect_variable | |
40a69fac | 948 | && NILP (internal_condition_case_1 (lisp_indirect_variable, variable, |
606cdb89 JB |
949 | Qt, user_variable_p_eh))) |
950 | return Qnil; | |
951 | ||
952 | while (1) | |
953 | { | |
954 | documentation = Fget (variable, Qvariable_documentation); | |
955 | if (INTEGERP (documentation) && XINT (documentation) < 0) | |
956 | return Qt; | |
957 | if (STRINGP (documentation) | |
958 | && ((unsigned char) SREF (documentation, 0) == '*')) | |
959 | return Qt; | |
960 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
961 | if (CONSP (documentation) | |
962 | && STRINGP (XCAR (documentation)) | |
963 | && INTEGERP (XCDR (documentation)) | |
964 | && XINT (XCDR (documentation)) < 0) | |
965 | return Qt; | |
966 | /* Customizable? See `custom-variable-p'. */ | |
967 | if ((!NILP (Fget (variable, intern ("standard-value")))) | |
968 | || (!NILP (Fget (variable, intern ("custom-autoload"))))) | |
969 | return Qt; | |
970 | ||
971 | if (!XSYMBOL (variable)->indirect_variable) | |
972 | return Qnil; | |
973 | ||
974 | /* An indirect variable? Let's follow the chain. */ | |
975 | variable = XSYMBOL (variable)->value; | |
976 | } | |
177c0ea7 | 977 | } |
db9f0278 JB |
978 | \f |
979 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
980 | doc: /* Bind variables according to VARLIST then eval BODY. |
981 | The value of the last form in BODY is returned. | |
982 | Each element of VARLIST is a symbol (which is bound to nil) | |
983 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
984 | Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
7a25dc6d | 985 | usage: (let* VARLIST BODY...) */) |
9dbc9081 | 986 | (args) |
db9f0278 JB |
987 | Lisp_Object args; |
988 | { | |
989 | Lisp_Object varlist, val, elt; | |
aed13378 | 990 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
991 | struct gcpro gcpro1, gcpro2, gcpro3; |
992 | ||
993 | GCPRO3 (args, elt, varlist); | |
994 | ||
995 | varlist = Fcar (args); | |
265a9e55 | 996 | while (!NILP (varlist)) |
db9f0278 JB |
997 | { |
998 | QUIT; | |
999 | elt = Fcar (varlist); | |
90165123 | 1000 | if (SYMBOLP (elt)) |
db9f0278 | 1001 | specbind (elt, Qnil); |
08564963 | 1002 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1003 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1004 | else |
1005 | { | |
1006 | val = Feval (Fcar (Fcdr (elt))); | |
1007 | specbind (Fcar (elt), val); | |
1008 | } | |
1009 | varlist = Fcdr (varlist); | |
1010 | } | |
1011 | UNGCPRO; | |
1012 | val = Fprogn (Fcdr (args)); | |
1013 | return unbind_to (count, val); | |
1014 | } | |
1015 | ||
1016 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1017 | doc: /* Bind variables according to VARLIST then eval BODY. |
1018 | The value of the last form in BODY is returned. | |
1019 | Each element of VARLIST is a symbol (which is bound to nil) | |
1020 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
1021 | All the VALUEFORMs are evalled before any symbols are bound. | |
7a25dc6d | 1022 | usage: (let VARLIST BODY...) */) |
9dbc9081 | 1023 | (args) |
db9f0278 JB |
1024 | Lisp_Object args; |
1025 | { | |
1026 | Lisp_Object *temps, tem; | |
1027 | register Lisp_Object elt, varlist; | |
aed13378 | 1028 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
1029 | register int argnum; |
1030 | struct gcpro gcpro1, gcpro2; | |
1031 | ||
1032 | varlist = Fcar (args); | |
1033 | ||
1034 | /* Make space to hold the values to give the bound variables */ | |
1035 | elt = Flength (varlist); | |
1036 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
1037 | ||
1038 | /* Compute the values and store them in `temps' */ | |
1039 | ||
1040 | GCPRO2 (args, *temps); | |
1041 | gcpro2.nvars = 0; | |
1042 | ||
67ee9f6e | 1043 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 JB |
1044 | { |
1045 | QUIT; | |
67ee9f6e | 1046 | elt = XCAR (varlist); |
90165123 | 1047 | if (SYMBOLP (elt)) |
db9f0278 | 1048 | temps [argnum++] = Qnil; |
08564963 | 1049 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1050 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1051 | else |
1052 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
1053 | gcpro2.nvars = argnum; | |
1054 | } | |
1055 | UNGCPRO; | |
1056 | ||
1057 | varlist = Fcar (args); | |
67ee9f6e | 1058 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 | 1059 | { |
67ee9f6e | 1060 | elt = XCAR (varlist); |
db9f0278 | 1061 | tem = temps[argnum++]; |
90165123 | 1062 | if (SYMBOLP (elt)) |
db9f0278 JB |
1063 | specbind (elt, tem); |
1064 | else | |
1065 | specbind (Fcar (elt), tem); | |
1066 | } | |
1067 | ||
1068 | elt = Fprogn (Fcdr (args)); | |
1069 | return unbind_to (count, elt); | |
1070 | } | |
1071 | ||
1072 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1073 | doc: /* If TEST yields non-nil, eval BODY... and repeat. |
1074 | The order of execution is thus TEST, BODY, TEST, BODY and so on | |
1075 | until TEST returns nil. | |
7a25dc6d | 1076 | usage: (while TEST BODY...) */) |
9dbc9081 | 1077 | (args) |
db9f0278 JB |
1078 | Lisp_Object args; |
1079 | { | |
2b9bde76 | 1080 | Lisp_Object test, body; |
db9f0278 JB |
1081 | struct gcpro gcpro1, gcpro2; |
1082 | ||
1083 | GCPRO2 (test, body); | |
1084 | ||
1085 | test = Fcar (args); | |
1086 | body = Fcdr (args); | |
2b9bde76 | 1087 | while (!NILP (Feval (test))) |
db9f0278 JB |
1088 | { |
1089 | QUIT; | |
1090 | Fprogn (body); | |
1091 | } | |
1092 | ||
1093 | UNGCPRO; | |
1094 | return Qnil; | |
1095 | } | |
1096 | ||
1097 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
9dbc9081 PJ |
1098 | doc: /* Return result of expanding macros at top level of FORM. |
1099 | If FORM is not a macro call, it is returned unchanged. | |
1100 | Otherwise, the macro is expanded and the expansion is considered | |
1101 | in place of FORM. When a non-macro-call results, it is returned. | |
1102 | ||
1103 | The second optional arg ENVIRONMENT specifies an environment of macro | |
1104 | definitions to shadow the loaded ones for use in file byte-compilation. */) | |
1105 | (form, environment) | |
2e267a2e | 1106 | Lisp_Object form; |
79e8bfbf | 1107 | Lisp_Object environment; |
db9f0278 | 1108 | { |
23d6b5a6 | 1109 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
1110 | register Lisp_Object expander, sym, def, tem; |
1111 | ||
1112 | while (1) | |
1113 | { | |
1114 | /* Come back here each time we expand a macro call, | |
1115 | in case it expands into another macro call. */ | |
90165123 | 1116 | if (!CONSP (form)) |
db9f0278 | 1117 | break; |
23d6b5a6 | 1118 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 1119 | def = sym = XCAR (form); |
23d6b5a6 | 1120 | tem = Qnil; |
db9f0278 JB |
1121 | /* Trace symbols aliases to other symbols |
1122 | until we get a symbol that is not an alias. */ | |
90165123 | 1123 | while (SYMBOLP (def)) |
db9f0278 JB |
1124 | { |
1125 | QUIT; | |
23d6b5a6 | 1126 | sym = def; |
79e8bfbf | 1127 | tem = Fassq (sym, environment); |
265a9e55 | 1128 | if (NILP (tem)) |
db9f0278 JB |
1129 | { |
1130 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
1131 | if (!EQ (def, Qunbound)) |
1132 | continue; | |
db9f0278 | 1133 | } |
23d6b5a6 | 1134 | break; |
db9f0278 | 1135 | } |
79e8bfbf | 1136 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 1137 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 1138 | if (NILP (tem)) |
db9f0278 | 1139 | { |
79e8bfbf | 1140 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 1141 | Look at its function definition. */ |
90165123 | 1142 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
1143 | /* Not defined or definition not suitable */ |
1144 | break; | |
03699b14 | 1145 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
1146 | { |
1147 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 1148 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 1149 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
1150 | /* Yes, load it and try again. */ |
1151 | { | |
ca20916b RS |
1152 | struct gcpro gcpro1; |
1153 | GCPRO1 (form); | |
ee9ee63c | 1154 | do_autoload (def, sym); |
ca20916b | 1155 | UNGCPRO; |
ee9ee63c JB |
1156 | continue; |
1157 | } | |
1158 | else | |
db9f0278 | 1159 | break; |
db9f0278 | 1160 | } |
03699b14 | 1161 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 1162 | break; |
03699b14 | 1163 | else expander = XCDR (def); |
db9f0278 JB |
1164 | } |
1165 | else | |
1166 | { | |
03699b14 | 1167 | expander = XCDR (tem); |
265a9e55 | 1168 | if (NILP (expander)) |
db9f0278 JB |
1169 | break; |
1170 | } | |
03699b14 | 1171 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
1172 | } |
1173 | return form; | |
1174 | } | |
1175 | \f | |
1176 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1177 | doc: /* Eval BODY allowing nonlocal exits using `throw'. |
1178 | TAG is evalled to get the tag to use; it must not be nil. | |
1179 | ||
1180 | Then the BODY is executed. | |
1d632ccf | 1181 | Within BODY, a call to `throw' with the same TAG exits BODY and this `catch'. |
9dbc9081 PJ |
1182 | If no throw happens, `catch' returns the value of the last BODY form. |
1183 | If a throw happens, it specifies the value to return from `catch'. | |
7a25dc6d | 1184 | usage: (catch TAG BODY...) */) |
9dbc9081 | 1185 | (args) |
db9f0278 JB |
1186 | Lisp_Object args; |
1187 | { | |
1188 | register Lisp_Object tag; | |
1189 | struct gcpro gcpro1; | |
1190 | ||
1191 | GCPRO1 (args); | |
1192 | tag = Feval (Fcar (args)); | |
1193 | UNGCPRO; | |
1194 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
1195 | } | |
1196 | ||
1197 | /* Set up a catch, then call C function FUNC on argument ARG. | |
1198 | FUNC should return a Lisp_Object. | |
1199 | This is how catches are done from within C code. */ | |
1200 | ||
1201 | Lisp_Object | |
1202 | internal_catch (tag, func, arg) | |
1203 | Lisp_Object tag; | |
1204 | Lisp_Object (*func) (); | |
1205 | Lisp_Object arg; | |
1206 | { | |
1207 | /* This structure is made part of the chain `catchlist'. */ | |
1208 | struct catchtag c; | |
1209 | ||
1210 | /* Fill in the components of c, and put it on the list. */ | |
1211 | c.next = catchlist; | |
1212 | c.tag = tag; | |
1213 | c.val = Qnil; | |
1214 | c.backlist = backtrace_list; | |
1215 | c.handlerlist = handlerlist; | |
1216 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1217 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1218 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1219 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1220 | c.gcpro = gcprolist; |
bcf28080 | 1221 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1222 | catchlist = &c; |
1223 | ||
1224 | /* Call FUNC. */ | |
1225 | if (! _setjmp (c.jmp)) | |
1226 | c.val = (*func) (arg); | |
1227 | ||
1228 | /* Throw works by a longjmp that comes right here. */ | |
1229 | catchlist = c.next; | |
1230 | return c.val; | |
1231 | } | |
1232 | ||
ba410f40 JB |
1233 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1234 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1235 | |
ba410f40 JB |
1236 | This is the guts Fthrow and Fsignal; they differ only in the way |
1237 | they choose the catch tag to throw to. A catch tag for a | |
1238 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1239 | |
ba410f40 JB |
1240 | Before each catch is discarded, unbind all special bindings and |
1241 | execute all unwind-protect clauses made above that catch. Unwind | |
1242 | the handler stack as we go, so that the proper handlers are in | |
1243 | effect for each unwind-protect clause we run. At the end, restore | |
1244 | some static info saved in CATCH, and longjmp to the location | |
1245 | specified in the | |
1246 | ||
1247 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
1248 | |
1249 | static void | |
ba410f40 | 1250 | unwind_to_catch (catch, value) |
db9f0278 | 1251 | struct catchtag *catch; |
ba410f40 | 1252 | Lisp_Object value; |
db9f0278 JB |
1253 | { |
1254 | register int last_time; | |
1255 | ||
ba410f40 JB |
1256 | /* Save the value in the tag. */ |
1257 | catch->val = value; | |
1258 | ||
0b31741c | 1259 | /* Restore certain special C variables. */ |
1cdc3155 | 1260 | set_poll_suppress_count (catch->poll_suppress_count); |
c1788fbc | 1261 | UNBLOCK_INPUT_TO (catch->interrupt_input_blocked); |
0b31741c | 1262 | handling_signal = 0; |
69bbd6bd | 1263 | immediate_quit = 0; |
82da7701 | 1264 | |
db9f0278 JB |
1265 | do |
1266 | { | |
1267 | last_time = catchlist == catch; | |
82da7701 JB |
1268 | |
1269 | /* Unwind the specpdl stack, and then restore the proper set of | |
1270 | handlers. */ | |
db9f0278 JB |
1271 | unbind_to (catchlist->pdlcount, Qnil); |
1272 | handlerlist = catchlist->handlerlist; | |
1273 | catchlist = catchlist->next; | |
1274 | } | |
1275 | while (! last_time); | |
1276 | ||
a2a103bb | 1277 | #if HAVE_X_WINDOWS |
88019a63 RS |
1278 | /* If x_catch_errors was done, turn it off now. |
1279 | (First we give unbind_to a chance to do that.) */ | |
e6aee454 KL |
1280 | #if 0 /* This would disable x_catch_errors after x_connection_closed. |
1281 | * The catch must remain in effect during that delicate | |
1282 | * state. --lorentey */ | |
88019a63 | 1283 | x_fully_uncatch_errors (); |
e6aee454 | 1284 | #endif |
a2a103bb | 1285 | #endif |
88019a63 | 1286 | |
bcf28080 | 1287 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1288 | gcprolist = catch->gcpro; |
15934ffa RS |
1289 | #ifdef DEBUG_GCPRO |
1290 | if (gcprolist != 0) | |
1291 | gcpro_level = gcprolist->level + 1; | |
1292 | else | |
1293 | gcpro_level = 0; | |
1294 | #endif | |
db9f0278 JB |
1295 | backtrace_list = catch->backlist; |
1296 | lisp_eval_depth = catch->lisp_eval_depth; | |
177c0ea7 | 1297 | |
ba410f40 | 1298 | _longjmp (catch->jmp, 1); |
db9f0278 JB |
1299 | } |
1300 | ||
1301 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
9dbc9081 PJ |
1302 | doc: /* Throw to the catch for TAG and return VALUE from it. |
1303 | Both TAG and VALUE are evalled. */) | |
1304 | (tag, value) | |
79e8bfbf | 1305 | register Lisp_Object tag, value; |
db9f0278 JB |
1306 | { |
1307 | register struct catchtag *c; | |
1308 | ||
8788120f KS |
1309 | if (!NILP (tag)) |
1310 | for (c = catchlist; c; c = c->next) | |
1311 | { | |
1312 | if (EQ (c->tag, tag)) | |
1313 | unwind_to_catch (c, value); | |
1314 | } | |
734d55a2 | 1315 | xsignal2 (Qno_catch, tag, value); |
db9f0278 JB |
1316 | } |
1317 | ||
1318 | ||
1319 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1320 | doc: /* Do BODYFORM, protecting with UNWINDFORMS. |
1321 | If BODYFORM completes normally, its value is returned | |
1322 | after executing the UNWINDFORMS. | |
1323 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
7a25dc6d | 1324 | usage: (unwind-protect BODYFORM UNWINDFORMS...) */) |
9dbc9081 | 1325 | (args) |
db9f0278 JB |
1326 | Lisp_Object args; |
1327 | { | |
1328 | Lisp_Object val; | |
aed13378 | 1329 | int count = SPECPDL_INDEX (); |
db9f0278 | 1330 | |
04b28167 | 1331 | record_unwind_protect (Fprogn, Fcdr (args)); |
db9f0278 | 1332 | val = Feval (Fcar (args)); |
177c0ea7 | 1333 | return unbind_to (count, val); |
db9f0278 JB |
1334 | } |
1335 | \f | |
1336 | /* Chain of condition handlers currently in effect. | |
1337 | The elements of this chain are contained in the stack frames | |
1338 | of Fcondition_case and internal_condition_case. | |
1339 | When an error is signaled (by calling Fsignal, below), | |
1340 | this chain is searched for an element that applies. */ | |
1341 | ||
1342 | struct handler *handlerlist; | |
1343 | ||
1344 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
9dbc9081 | 1345 | doc: /* Regain control when an error is signaled. |
1b1acc13 | 1346 | Executes BODYFORM and returns its value if no error happens. |
9dbc9081 PJ |
1347 | Each element of HANDLERS looks like (CONDITION-NAME BODY...) |
1348 | where the BODY is made of Lisp expressions. | |
1349 | ||
1350 | A handler is applicable to an error | |
1351 | if CONDITION-NAME is one of the error's condition names. | |
1352 | If an error happens, the first applicable handler is run. | |
1353 | ||
1354 | The car of a handler may be a list of condition names | |
c997bb25 | 1355 | instead of a single condition name. Then it handles all of them. |
9dbc9081 | 1356 | |
c997bb25 RS |
1357 | When a handler handles an error, control returns to the `condition-case' |
1358 | and it executes the handler's BODY... | |
d0acbbaf | 1359 | with VAR bound to (ERROR-SYMBOL . SIGNAL-DATA) from the error. |
c997bb25 RS |
1360 | (If VAR is nil, the handler can't access that information.) |
1361 | Then the value of the last BODY form is returned from the `condition-case' | |
1362 | expression. | |
9dbc9081 | 1363 | |
9dbc9081 | 1364 | See also the function `signal' for more info. |
2b47b74d | 1365 | usage: (condition-case VAR BODYFORM &rest HANDLERS) */) |
9dbc9081 | 1366 | (args) |
db9f0278 JB |
1367 | Lisp_Object args; |
1368 | { | |
17401c97 GM |
1369 | register Lisp_Object bodyform, handlers; |
1370 | volatile Lisp_Object var; | |
db9f0278 | 1371 | |
82da7701 JB |
1372 | var = Fcar (args); |
1373 | bodyform = Fcar (Fcdr (args)); | |
1374 | handlers = Fcdr (Fcdr (args)); | |
ee830945 RS |
1375 | |
1376 | return internal_lisp_condition_case (var, bodyform, handlers); | |
1377 | } | |
1378 | ||
1379 | /* Like Fcondition_case, but the args are separate | |
1380 | rather than passed in a list. Used by Fbyte_code. */ | |
1381 | ||
1382 | Lisp_Object | |
1383 | internal_lisp_condition_case (var, bodyform, handlers) | |
1384 | volatile Lisp_Object var; | |
1385 | Lisp_Object bodyform, handlers; | |
1386 | { | |
1387 | Lisp_Object val; | |
1388 | struct catchtag c; | |
1389 | struct handler h; | |
1390 | ||
b7826503 | 1391 | CHECK_SYMBOL (var); |
82da7701 | 1392 | |
2b47b74d | 1393 | for (val = handlers; CONSP (val); val = XCDR (val)) |
82da7701 JB |
1394 | { |
1395 | Lisp_Object tem; | |
2b47b74d | 1396 | tem = XCAR (val); |
5f96776a RS |
1397 | if (! (NILP (tem) |
1398 | || (CONSP (tem) | |
03699b14 KR |
1399 | && (SYMBOLP (XCAR (tem)) |
1400 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1401 | error ("Invalid condition handler", tem); |
1402 | } | |
db9f0278 JB |
1403 | |
1404 | c.tag = Qnil; | |
1405 | c.val = Qnil; | |
1406 | c.backlist = backtrace_list; | |
1407 | c.handlerlist = handlerlist; | |
1408 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1409 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1410 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1411 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1412 | c.gcpro = gcprolist; |
bcf28080 | 1413 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1414 | if (_setjmp (c.jmp)) |
1415 | { | |
265a9e55 | 1416 | if (!NILP (h.var)) |
9d58218c RS |
1417 | specbind (h.var, c.val); |
1418 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1419 | |
1420 | /* Note that this just undoes the binding of h.var; whoever | |
1421 | longjumped to us unwound the stack to c.pdlcount before | |
1422 | throwing. */ | |
db9f0278 JB |
1423 | unbind_to (c.pdlcount, Qnil); |
1424 | return val; | |
1425 | } | |
1426 | c.next = catchlist; | |
1427 | catchlist = &c; | |
177c0ea7 | 1428 | |
82da7701 JB |
1429 | h.var = var; |
1430 | h.handler = handlers; | |
db9f0278 | 1431 | h.next = handlerlist; |
db9f0278 JB |
1432 | h.tag = &c; |
1433 | handlerlist = &h; | |
1434 | ||
82da7701 | 1435 | val = Feval (bodyform); |
db9f0278 JB |
1436 | catchlist = c.next; |
1437 | handlerlist = h.next; | |
1438 | return val; | |
1439 | } | |
1440 | ||
f029ca5f RS |
1441 | /* Call the function BFUN with no arguments, catching errors within it |
1442 | according to HANDLERS. If there is an error, call HFUN with | |
1443 | one argument which is the data that describes the error: | |
1444 | (SIGNALNAME . DATA) | |
1445 | ||
1446 | HANDLERS can be a list of conditions to catch. | |
1447 | If HANDLERS is Qt, catch all errors. | |
1448 | If HANDLERS is Qerror, catch all errors | |
1449 | but allow the debugger to run if that is enabled. */ | |
1450 | ||
db9f0278 JB |
1451 | Lisp_Object |
1452 | internal_condition_case (bfun, handlers, hfun) | |
1453 | Lisp_Object (*bfun) (); | |
1454 | Lisp_Object handlers; | |
1455 | Lisp_Object (*hfun) (); | |
1456 | { | |
1457 | Lisp_Object val; | |
1458 | struct catchtag c; | |
1459 | struct handler h; | |
1460 | ||
88019a63 RS |
1461 | /* Since Fsignal will close off all calls to x_catch_errors, |
1462 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1463 | #if HAVE_X_WINDOWS |
88019a63 | 1464 | if (x_catching_errors ()) |
01591d17 | 1465 | abort (); |
a2a103bb | 1466 | #endif |
01591d17 | 1467 | |
db9f0278 JB |
1468 | c.tag = Qnil; |
1469 | c.val = Qnil; | |
1470 | c.backlist = backtrace_list; | |
1471 | c.handlerlist = handlerlist; | |
1472 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1473 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1474 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1475 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1476 | c.gcpro = gcprolist; |
bcf28080 | 1477 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1478 | if (_setjmp (c.jmp)) |
1479 | { | |
9d58218c | 1480 | return (*hfun) (c.val); |
db9f0278 JB |
1481 | } |
1482 | c.next = catchlist; | |
1483 | catchlist = &c; | |
1484 | h.handler = handlers; | |
1485 | h.var = Qnil; | |
db9f0278 JB |
1486 | h.next = handlerlist; |
1487 | h.tag = &c; | |
1488 | handlerlist = &h; | |
1489 | ||
1490 | val = (*bfun) (); | |
1491 | catchlist = c.next; | |
1492 | handlerlist = h.next; | |
1493 | return val; | |
1494 | } | |
1495 | ||
2659a09f | 1496 | /* Like internal_condition_case but call BFUN with ARG as its argument. */ |
f029ca5f | 1497 | |
d227775c RS |
1498 | Lisp_Object |
1499 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1500 | Lisp_Object (*bfun) (); | |
1501 | Lisp_Object arg; | |
1502 | Lisp_Object handlers; | |
1503 | Lisp_Object (*hfun) (); | |
1504 | { | |
1505 | Lisp_Object val; | |
1506 | struct catchtag c; | |
1507 | struct handler h; | |
1508 | ||
88019a63 RS |
1509 | /* Since Fsignal will close off all calls to x_catch_errors, |
1510 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1511 | #if HAVE_X_WINDOWS |
88019a63 RS |
1512 | if (x_catching_errors ()) |
1513 | abort (); | |
a2a103bb | 1514 | #endif |
88019a63 | 1515 | |
d227775c RS |
1516 | c.tag = Qnil; |
1517 | c.val = Qnil; | |
1518 | c.backlist = backtrace_list; | |
1519 | c.handlerlist = handlerlist; | |
1520 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1521 | c.pdlcount = SPECPDL_INDEX (); |
d227775c | 1522 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1523 | c.interrupt_input_blocked = interrupt_input_blocked; |
d227775c | 1524 | c.gcpro = gcprolist; |
bcf28080 | 1525 | c.byte_stack = byte_stack_list; |
d227775c RS |
1526 | if (_setjmp (c.jmp)) |
1527 | { | |
9d58218c | 1528 | return (*hfun) (c.val); |
d227775c RS |
1529 | } |
1530 | c.next = catchlist; | |
1531 | catchlist = &c; | |
1532 | h.handler = handlers; | |
1533 | h.var = Qnil; | |
1534 | h.next = handlerlist; | |
1535 | h.tag = &c; | |
1536 | handlerlist = &h; | |
1537 | ||
1538 | val = (*bfun) (arg); | |
1539 | catchlist = c.next; | |
1540 | handlerlist = h.next; | |
1541 | return val; | |
1542 | } | |
10b29d41 GM |
1543 | |
1544 | ||
2659a09f | 1545 | /* Like internal_condition_case but call BFUN with NARGS as first, |
10b29d41 GM |
1546 | and ARGS as second argument. */ |
1547 | ||
1548 | Lisp_Object | |
1549 | internal_condition_case_2 (bfun, nargs, args, handlers, hfun) | |
1550 | Lisp_Object (*bfun) (); | |
1551 | int nargs; | |
1552 | Lisp_Object *args; | |
1553 | Lisp_Object handlers; | |
1554 | Lisp_Object (*hfun) (); | |
1555 | { | |
1556 | Lisp_Object val; | |
1557 | struct catchtag c; | |
1558 | struct handler h; | |
1559 | ||
88019a63 RS |
1560 | /* Since Fsignal will close off all calls to x_catch_errors, |
1561 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1562 | #if HAVE_X_WINDOWS |
88019a63 RS |
1563 | if (x_catching_errors ()) |
1564 | abort (); | |
a2a103bb | 1565 | #endif |
88019a63 | 1566 | |
10b29d41 GM |
1567 | c.tag = Qnil; |
1568 | c.val = Qnil; | |
1569 | c.backlist = backtrace_list; | |
1570 | c.handlerlist = handlerlist; | |
1571 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1572 | c.pdlcount = SPECPDL_INDEX (); |
10b29d41 | 1573 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1574 | c.interrupt_input_blocked = interrupt_input_blocked; |
10b29d41 GM |
1575 | c.gcpro = gcprolist; |
1576 | c.byte_stack = byte_stack_list; | |
1577 | if (_setjmp (c.jmp)) | |
1578 | { | |
1579 | return (*hfun) (c.val); | |
1580 | } | |
1581 | c.next = catchlist; | |
1582 | catchlist = &c; | |
1583 | h.handler = handlers; | |
1584 | h.var = Qnil; | |
1585 | h.next = handlerlist; | |
1586 | h.tag = &c; | |
1587 | handlerlist = &h; | |
1588 | ||
1589 | val = (*bfun) (nargs, args); | |
1590 | catchlist = c.next; | |
1591 | handlerlist = h.next; | |
1592 | return val; | |
1593 | } | |
1594 | ||
d227775c | 1595 | \f |
2901f1d1 | 1596 | static Lisp_Object find_handler_clause P_ ((Lisp_Object, Lisp_Object, |
f01cbfdd | 1597 | Lisp_Object, Lisp_Object)); |
db9f0278 JB |
1598 | |
1599 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
9dbc9081 PJ |
1600 | doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA. |
1601 | This function does not return. | |
1602 | ||
1603 | An error symbol is a symbol with an `error-conditions' property | |
1604 | that is a list of condition names. | |
1605 | A handler for any of those names will get to handle this signal. | |
1606 | The symbol `error' should normally be one of them. | |
1607 | ||
1608 | DATA should be a list. Its elements are printed as part of the error message. | |
3297ec22 LT |
1609 | See Info anchor `(elisp)Definition of signal' for some details on how this |
1610 | error message is constructed. | |
9dbc9081 PJ |
1611 | If the signal is handled, DATA is made available to the handler. |
1612 | See also the function `condition-case'. */) | |
1613 | (error_symbol, data) | |
4200e719 | 1614 | Lisp_Object error_symbol, data; |
db9f0278 | 1615 | { |
bfa8ca43 | 1616 | /* When memory is full, ERROR-SYMBOL is nil, |
26631f2b RS |
1617 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). |
1618 | That is a special case--don't do this in other situations. */ | |
db9f0278 JB |
1619 | register struct handler *allhandlers = handlerlist; |
1620 | Lisp_Object conditions; | |
1621 | extern int gc_in_progress; | |
1622 | extern int waiting_for_input; | |
c11d3d17 | 1623 | Lisp_Object string; |
1ea9dec4 | 1624 | Lisp_Object real_error_symbol; |
a2ff3819 | 1625 | struct backtrace *bp; |
db9f0278 | 1626 | |
346598f1 | 1627 | immediate_quit = handling_signal = 0; |
d063129f | 1628 | abort_on_gc = 0; |
db9f0278 JB |
1629 | if (gc_in_progress || waiting_for_input) |
1630 | abort (); | |
1631 | ||
1ea9dec4 RS |
1632 | if (NILP (error_symbol)) |
1633 | real_error_symbol = Fcar (data); | |
1634 | else | |
1635 | real_error_symbol = error_symbol; | |
1636 | ||
26631f2b RS |
1637 | #if 0 /* rms: I don't know why this was here, |
1638 | but it is surely wrong for an error that is handled. */ | |
d148e14d | 1639 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
1640 | if (display_hourglass_p) |
1641 | cancel_hourglass (); | |
48f8dfa3 | 1642 | #endif |
177c0ea7 | 1643 | #endif |
48f8dfa3 | 1644 | |
61ede770 | 1645 | /* This hook is used by edebug. */ |
26631f2b RS |
1646 | if (! NILP (Vsignal_hook_function) |
1647 | && ! NILP (error_symbol)) | |
9f5903bb RS |
1648 | { |
1649 | /* Edebug takes care of restoring these variables when it exits. */ | |
1650 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1651 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1652 | ||
1653 | if (SPECPDL_INDEX () + 40 > max_specpdl_size) | |
1654 | max_specpdl_size = SPECPDL_INDEX () + 40; | |
1655 | ||
1656 | call2 (Vsignal_hook_function, error_symbol, data); | |
1657 | } | |
61ede770 | 1658 | |
1ea9dec4 | 1659 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1660 | |
a2ff3819 GM |
1661 | /* Remember from where signal was called. Skip over the frame for |
1662 | `signal' itself. If a frame for `error' follows, skip that, | |
26631f2b RS |
1663 | too. Don't do this when ERROR_SYMBOL is nil, because that |
1664 | is a memory-full error. */ | |
090a072f | 1665 | Vsignaling_function = Qnil; |
26631f2b | 1666 | if (backtrace_list && !NILP (error_symbol)) |
090a072f GM |
1667 | { |
1668 | bp = backtrace_list->next; | |
1669 | if (bp && bp->function && EQ (*bp->function, Qerror)) | |
1670 | bp = bp->next; | |
1671 | if (bp && bp->function) | |
1672 | Vsignaling_function = *bp->function; | |
1673 | } | |
a2ff3819 | 1674 | |
db9f0278 JB |
1675 | for (; handlerlist; handlerlist = handlerlist->next) |
1676 | { | |
1677 | register Lisp_Object clause; | |
177c0ea7 | 1678 | |
db9f0278 | 1679 | clause = find_handler_clause (handlerlist->handler, conditions, |
f01cbfdd | 1680 | error_symbol, data); |
db9f0278 | 1681 | |
db9f0278 | 1682 | if (EQ (clause, Qlambda)) |
82da7701 | 1683 | { |
690337b7 KH |
1684 | /* We can't return values to code which signaled an error, but we |
1685 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1686 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1687 | return Qnil; |
1688 | else | |
d3e6f8be | 1689 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1690 | } |
db9f0278 | 1691 | |
265a9e55 | 1692 | if (!NILP (clause)) |
db9f0278 | 1693 | { |
9d58218c | 1694 | Lisp_Object unwind_data; |
db9f0278 | 1695 | struct handler *h = handlerlist; |
9d58218c | 1696 | |
db9f0278 | 1697 | handlerlist = allhandlers; |
1ea9dec4 RS |
1698 | |
1699 | if (NILP (error_symbol)) | |
1700 | unwind_data = data; | |
9d58218c RS |
1701 | else |
1702 | unwind_data = Fcons (error_symbol, data); | |
1703 | h->chosen_clause = clause; | |
1704 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1705 | } |
1706 | } | |
1707 | ||
1708 | handlerlist = allhandlers; | |
1709 | /* If no handler is present now, try to run the debugger, | |
1710 | and if that fails, throw to top level. */ | |
f01cbfdd | 1711 | find_handler_clause (Qerror, conditions, error_symbol, data); |
c11d3d17 RS |
1712 | if (catchlist != 0) |
1713 | Fthrow (Qtop_level, Qt); | |
1714 | ||
1ea9dec4 | 1715 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1716 | data = Fcons (error_symbol, data); |
1717 | ||
1718 | string = Ferror_message_string (data); | |
d5db4077 | 1719 | fatal ("%s", SDATA (string), 0); |
db9f0278 JB |
1720 | } |
1721 | ||
734d55a2 KS |
1722 | /* Internal version of Fsignal that never returns. |
1723 | Used for anything but Qquit (which can return from Fsignal). */ | |
1724 | ||
1725 | void | |
1726 | xsignal (error_symbol, data) | |
1727 | Lisp_Object error_symbol, data; | |
1728 | { | |
1729 | Fsignal (error_symbol, data); | |
1730 | abort (); | |
1731 | } | |
1732 | ||
1733 | /* Like xsignal, but takes 0, 1, 2, or 3 args instead of a list. */ | |
1734 | ||
1735 | void | |
1736 | xsignal0 (error_symbol) | |
1737 | Lisp_Object error_symbol; | |
1738 | { | |
1739 | xsignal (error_symbol, Qnil); | |
1740 | } | |
1741 | ||
1742 | void | |
1743 | xsignal1 (error_symbol, arg) | |
1744 | Lisp_Object error_symbol, arg; | |
1745 | { | |
1746 | xsignal (error_symbol, list1 (arg)); | |
1747 | } | |
1748 | ||
1749 | void | |
1750 | xsignal2 (error_symbol, arg1, arg2) | |
1751 | Lisp_Object error_symbol, arg1, arg2; | |
1752 | { | |
1753 | xsignal (error_symbol, list2 (arg1, arg2)); | |
1754 | } | |
1755 | ||
1756 | void | |
1757 | xsignal3 (error_symbol, arg1, arg2, arg3) | |
1758 | Lisp_Object error_symbol, arg1, arg2, arg3; | |
1759 | { | |
1760 | xsignal (error_symbol, list3 (arg1, arg2, arg3)); | |
1761 | } | |
1762 | ||
1763 | /* Signal `error' with message S, and additional arg ARG. | |
1764 | If ARG is not a genuine list, make it a one-element list. */ | |
1765 | ||
1766 | void | |
1767 | signal_error (s, arg) | |
1768 | char *s; | |
1769 | Lisp_Object arg; | |
1770 | { | |
1771 | Lisp_Object tortoise, hare; | |
1772 | ||
1773 | hare = tortoise = arg; | |
1774 | while (CONSP (hare)) | |
1775 | { | |
1776 | hare = XCDR (hare); | |
1777 | if (!CONSP (hare)) | |
1778 | break; | |
1779 | ||
1780 | hare = XCDR (hare); | |
1781 | tortoise = XCDR (tortoise); | |
1782 | ||
1783 | if (EQ (hare, tortoise)) | |
1784 | break; | |
1785 | } | |
1786 | ||
1787 | if (!NILP (hare)) | |
1788 | arg = Fcons (arg, Qnil); /* Make it a list. */ | |
1789 | ||
1790 | xsignal (Qerror, Fcons (build_string (s), arg)); | |
1791 | } | |
1792 | ||
1793 | ||
e0f24100 | 1794 | /* Return nonzero if LIST is a non-nil atom or |
128c0f66 RM |
1795 | a list containing one of CONDITIONS. */ |
1796 | ||
1797 | static int | |
1798 | wants_debugger (list, conditions) | |
1799 | Lisp_Object list, conditions; | |
1800 | { | |
4de86b16 | 1801 | if (NILP (list)) |
128c0f66 RM |
1802 | return 0; |
1803 | if (! CONSP (list)) | |
1804 | return 1; | |
1805 | ||
ab67260b | 1806 | while (CONSP (conditions)) |
128c0f66 | 1807 | { |
ab67260b | 1808 | Lisp_Object this, tail; |
03699b14 KR |
1809 | this = XCAR (conditions); |
1810 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1811 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1812 | return 1; |
03699b14 | 1813 | conditions = XCDR (conditions); |
128c0f66 | 1814 | } |
ab67260b | 1815 | return 0; |
128c0f66 RM |
1816 | } |
1817 | ||
fc950e09 KH |
1818 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1819 | and described by SIGNAL-DATA, should skip the debugger | |
1b1acc13 | 1820 | according to debugger-ignored-errors. */ |
fc950e09 KH |
1821 | |
1822 | static int | |
1823 | skip_debugger (conditions, data) | |
1824 | Lisp_Object conditions, data; | |
1825 | { | |
1826 | Lisp_Object tail; | |
1827 | int first_string = 1; | |
1828 | Lisp_Object error_message; | |
1829 | ||
17401c97 GM |
1830 | error_message = Qnil; |
1831 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1832 | { |
03699b14 | 1833 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1834 | { |
1835 | if (first_string) | |
1836 | { | |
1837 | error_message = Ferror_message_string (data); | |
1838 | first_string = 0; | |
1839 | } | |
177c0ea7 | 1840 | |
03699b14 | 1841 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1842 | return 1; |
1843 | } | |
1844 | else | |
1845 | { | |
1846 | Lisp_Object contail; | |
1847 | ||
17401c97 | 1848 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1849 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1850 | return 1; |
1851 | } | |
1852 | } | |
1853 | ||
1854 | return 0; | |
1855 | } | |
1856 | ||
ddaa36e1 AS |
1857 | /* Call the debugger if calling it is currently enabled for CONDITIONS. |
1858 | SIG and DATA describe the signal, as in find_handler_clause. */ | |
1859 | ||
1860 | static int | |
1861 | maybe_call_debugger (conditions, sig, data) | |
1862 | Lisp_Object conditions, sig, data; | |
1863 | { | |
1864 | Lisp_Object combined_data; | |
1865 | ||
1866 | combined_data = Fcons (sig, data); | |
1867 | ||
1868 | if ( | |
1869 | /* Don't try to run the debugger with interrupts blocked. | |
1870 | The editing loop would return anyway. */ | |
1871 | ! INPUT_BLOCKED_P | |
1872 | /* Does user want to enter debugger for this kind of error? */ | |
1873 | && (EQ (sig, Qquit) | |
1874 | ? debug_on_quit | |
1875 | : wants_debugger (Vdebug_on_error, conditions)) | |
1876 | && ! skip_debugger (conditions, combined_data) | |
1877 | /* rms: what's this for? */ | |
1878 | && when_entered_debugger < num_nonmacro_input_events) | |
1879 | { | |
1880 | call_debugger (Fcons (Qerror, Fcons (combined_data, Qnil))); | |
1881 | return 1; | |
1882 | } | |
1883 | ||
1884 | return 0; | |
1885 | } | |
1886 | ||
128c0f66 | 1887 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1888 | There are two ways to pass SIG and DATA: |
9b942ebd | 1889 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1890 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1891 | This is for memory-full errors only. |
1ea9dec4 | 1892 | |
9f5903bb RS |
1893 | We need to increase max_specpdl_size temporarily around |
1894 | anything we do that can push on the specpdl, so as not to get | |
1895 | a second error here in case we're handling specpdl overflow. */ | |
db9f0278 JB |
1896 | |
1897 | static Lisp_Object | |
f01cbfdd | 1898 | find_handler_clause (handlers, conditions, sig, data) |
db9f0278 | 1899 | Lisp_Object handlers, conditions, sig, data; |
db9f0278 JB |
1900 | { |
1901 | register Lisp_Object h; | |
1902 | register Lisp_Object tem; | |
f01cbfdd RS |
1903 | int debugger_called = 0; |
1904 | int debugger_considered = 0; | |
db9f0278 | 1905 | |
f01cbfdd RS |
1906 | /* t is used by handlers for all conditions, set up by C code. */ |
1907 | if (EQ (handlers, Qt)) | |
db9f0278 | 1908 | return Qt; |
f01cbfdd RS |
1909 | |
1910 | /* Don't run the debugger for a memory-full error. | |
1911 | (There is no room in memory to do that!) */ | |
1912 | if (NILP (sig)) | |
1913 | debugger_considered = 1; | |
1914 | ||
61ede770 RS |
1915 | /* error is used similarly, but means print an error message |
1916 | and run the debugger if that is enabled. */ | |
1917 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1918 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1919 | there is a handler. */ | |
db9f0278 | 1920 | { |
f01cbfdd | 1921 | if (!NILP (sig) && wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b | 1922 | { |
48ce8ca7 | 1923 | max_lisp_eval_depth += 15; |
9f5903bb | 1924 | max_specpdl_size++; |
5b650faa SM |
1925 | if (noninteractive) |
1926 | Fbacktrace (); | |
1927 | else | |
1928 | internal_with_output_to_temp_buffer | |
1929 | ("*Backtrace*", | |
1930 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1931 | Qnil); | |
9f5903bb | 1932 | max_specpdl_size--; |
48ce8ca7 | 1933 | max_lisp_eval_depth -= 15; |
88817f3b | 1934 | } |
f01cbfdd RS |
1935 | |
1936 | if (!debugger_considered) | |
db9f0278 | 1937 | { |
f01cbfdd RS |
1938 | debugger_considered = 1; |
1939 | debugger_called = maybe_call_debugger (conditions, sig, data); | |
61ede770 | 1940 | } |
f01cbfdd | 1941 | |
61ede770 RS |
1942 | /* If there is no handler, return saying whether we ran the debugger. */ |
1943 | if (EQ (handlers, Qerror)) | |
1944 | { | |
1945 | if (debugger_called) | |
9f5903bb | 1946 | return Qlambda; |
61ede770 | 1947 | return Qt; |
db9f0278 | 1948 | } |
db9f0278 | 1949 | } |
f01cbfdd | 1950 | |
db9f0278 JB |
1951 | for (h = handlers; CONSP (h); h = Fcdr (h)) |
1952 | { | |
5f96776a RS |
1953 | Lisp_Object handler, condit; |
1954 | ||
1955 | handler = Fcar (h); | |
1956 | if (!CONSP (handler)) | |
db9f0278 | 1957 | continue; |
5f96776a RS |
1958 | condit = Fcar (handler); |
1959 | /* Handle a single condition name in handler HANDLER. */ | |
1960 | if (SYMBOLP (condit)) | |
1961 | { | |
1962 | tem = Fmemq (Fcar (handler), conditions); | |
1963 | if (!NILP (tem)) | |
1964 | return handler; | |
1965 | } | |
1966 | /* Handle a list of condition names in handler HANDLER. */ | |
1967 | else if (CONSP (condit)) | |
1968 | { | |
f01cbfdd RS |
1969 | Lisp_Object tail; |
1970 | for (tail = condit; CONSP (tail); tail = XCDR (tail)) | |
5f96776a | 1971 | { |
f01cbfdd | 1972 | tem = Fmemq (Fcar (tail), conditions); |
5f96776a | 1973 | if (!NILP (tem)) |
f01cbfdd RS |
1974 | { |
1975 | /* This handler is going to apply. | |
1976 | Does it allow the debugger to run first? */ | |
1977 | if (! debugger_considered && !NILP (Fmemq (Qdebug, condit))) | |
1978 | maybe_call_debugger (conditions, sig, data); | |
1979 | return handler; | |
1980 | } | |
5f96776a RS |
1981 | } |
1982 | } | |
db9f0278 | 1983 | } |
f01cbfdd | 1984 | |
db9f0278 JB |
1985 | return Qnil; |
1986 | } | |
1987 | ||
1988 | /* dump an error message; called like printf */ | |
1989 | ||
1990 | /* VARARGS 1 */ | |
1991 | void | |
1992 | error (m, a1, a2, a3) | |
1993 | char *m; | |
9125da08 | 1994 | char *a1, *a2, *a3; |
db9f0278 JB |
1995 | { |
1996 | char buf[200]; | |
9125da08 RS |
1997 | int size = 200; |
1998 | int mlen; | |
1999 | char *buffer = buf; | |
2000 | char *args[3]; | |
2001 | int allocated = 0; | |
2002 | Lisp_Object string; | |
2003 | ||
2004 | args[0] = a1; | |
2005 | args[1] = a2; | |
2006 | args[2] = a3; | |
2007 | ||
2008 | mlen = strlen (m); | |
db9f0278 JB |
2009 | |
2010 | while (1) | |
9125da08 | 2011 | { |
955f3ff9 | 2012 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
2013 | if (used < size) |
2014 | break; | |
2015 | size *= 2; | |
2016 | if (allocated) | |
2017 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
2018 | else |
2019 | { | |
2020 | buffer = (char *) xmalloc (size); | |
2021 | allocated = 1; | |
2022 | } | |
9125da08 RS |
2023 | } |
2024 | ||
955f3ff9 | 2025 | string = build_string (buffer); |
9125da08 | 2026 | if (allocated) |
9ae6734f | 2027 | xfree (buffer); |
9125da08 | 2028 | |
734d55a2 | 2029 | xsignal1 (Qerror, string); |
db9f0278 JB |
2030 | } |
2031 | \f | |
e72706be | 2032 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 2, 0, |
9dbc9081 PJ |
2033 | doc: /* Non-nil if FUNCTION makes provisions for interactive calling. |
2034 | This means it contains a description for how to read arguments to give it. | |
2035 | The value is nil for an invalid function or a symbol with no function | |
2036 | definition. | |
2037 | ||
2038 | Interactively callable functions include strings and vectors (treated | |
2039 | as keyboard macros), lambda-expressions that contain a top-level call | |
2040 | to `interactive', autoload definitions made by `autoload' with non-nil | |
2041 | fourth argument, and some of the built-in functions of Lisp. | |
2042 | ||
e72706be RS |
2043 | Also, a symbol satisfies `commandp' if its function definition does so. |
2044 | ||
2045 | If the optional argument FOR-CALL-INTERACTIVELY is non-nil, | |
769b4fb2 | 2046 | then strings and vectors are not accepted. */) |
e72706be RS |
2047 | (function, for_call_interactively) |
2048 | Lisp_Object function, for_call_interactively; | |
db9f0278 JB |
2049 | { |
2050 | register Lisp_Object fun; | |
2051 | register Lisp_Object funcar; | |
52b71f49 | 2052 | Lisp_Object if_prop = Qnil; |
db9f0278 JB |
2053 | |
2054 | fun = function; | |
2055 | ||
52b71f49 SM |
2056 | fun = indirect_function (fun); /* Check cycles. */ |
2057 | if (NILP (fun) || EQ (fun, Qunbound)) | |
ffd56f97 | 2058 | return Qnil; |
db9f0278 | 2059 | |
52b71f49 SM |
2060 | /* Check an `interactive-form' property if present, analogous to the |
2061 | function-documentation property. */ | |
2062 | fun = function; | |
2063 | while (SYMBOLP (fun)) | |
2064 | { | |
2b9aa051 | 2065 | Lisp_Object tmp = Fget (fun, Qinteractive_form); |
52b71f49 SM |
2066 | if (!NILP (tmp)) |
2067 | if_prop = Qt; | |
2068 | fun = Fsymbol_function (fun); | |
2069 | } | |
2070 | ||
db9f0278 JB |
2071 | /* Emacs primitives are interactive if their DEFUN specifies an |
2072 | interactive spec. */ | |
90165123 | 2073 | if (SUBRP (fun)) |
04724b69 | 2074 | return XSUBR (fun)->intspec ? Qt : if_prop; |
db9f0278 JB |
2075 | |
2076 | /* Bytecode objects are interactive if they are long enough to | |
2077 | have an element whose index is COMPILED_INTERACTIVE, which is | |
2078 | where the interactive spec is stored. */ | |
90165123 | 2079 | else if (COMPILEDP (fun)) |
845975f5 | 2080 | return ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
52b71f49 | 2081 | ? Qt : if_prop); |
db9f0278 JB |
2082 | |
2083 | /* Strings and vectors are keyboard macros. */ | |
52b71f49 | 2084 | if (STRINGP (fun) || VECTORP (fun)) |
6e33efc4 | 2085 | return (NILP (for_call_interactively) ? Qt : Qnil); |
db9f0278 JB |
2086 | |
2087 | /* Lists may represent commands. */ | |
2088 | if (!CONSP (fun)) | |
2089 | return Qnil; | |
ed16fb98 | 2090 | funcar = XCAR (fun); |
db9f0278 | 2091 | if (EQ (funcar, Qlambda)) |
52b71f49 | 2092 | return !NILP (Fassq (Qinteractive, Fcdr (XCDR (fun)))) ? Qt : if_prop; |
db9f0278 | 2093 | if (EQ (funcar, Qautoload)) |
52b71f49 | 2094 | return !NILP (Fcar (Fcdr (Fcdr (XCDR (fun))))) ? Qt : if_prop; |
db9f0278 JB |
2095 | else |
2096 | return Qnil; | |
2097 | } | |
2098 | ||
db9f0278 | 2099 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, |
9dbc9081 PJ |
2100 | doc: /* Define FUNCTION to autoload from FILE. |
2101 | FUNCTION is a symbol; FILE is a file name string to pass to `load'. | |
2102 | Third arg DOCSTRING is documentation for the function. | |
2103 | Fourth arg INTERACTIVE if non-nil says function can be called interactively. | |
2104 | Fifth arg TYPE indicates the type of the object: | |
2105 | nil or omitted says FUNCTION is a function, | |
2106 | `keymap' says FUNCTION is really a keymap, and | |
2107 | `macro' or t says FUNCTION is really a macro. | |
2108 | Third through fifth args give info about the real definition. | |
2109 | They default to nil. | |
2110 | If FUNCTION is already defined other than as an autoload, | |
2111 | this does nothing and returns nil. */) | |
2112 | (function, file, docstring, interactive, type) | |
ee9ee63c | 2113 | Lisp_Object function, file, docstring, interactive, type; |
db9f0278 | 2114 | { |
db9f0278 | 2115 | Lisp_Object args[4]; |
db9f0278 | 2116 | |
b7826503 PJ |
2117 | CHECK_SYMBOL (function); |
2118 | CHECK_STRING (file); | |
db9f0278 JB |
2119 | |
2120 | /* If function is defined and not as an autoload, don't override */ | |
2121 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 2122 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 2123 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
2124 | return Qnil; |
2125 | ||
7973e637 SM |
2126 | if (NILP (Vpurify_flag)) |
2127 | /* Only add entries after dumping, because the ones before are | |
2128 | not useful and else we get loads of them from the loaddefs.el. */ | |
2129 | LOADHIST_ATTACH (Fcons (Qautoload, function)); | |
905a9ed3 | 2130 | else |
a56eaaef DN |
2131 | /* We don't want the docstring in purespace (instead, |
2132 | Snarf-documentation should (hopefully) overwrite it). */ | |
2133 | docstring = make_number (0); | |
2134 | return Ffset (function, | |
2135 | Fpurecopy (list5 (Qautoload, file, docstring, | |
2136 | interactive, type))); | |
db9f0278 JB |
2137 | } |
2138 | ||
2139 | Lisp_Object | |
2140 | un_autoload (oldqueue) | |
2141 | Lisp_Object oldqueue; | |
2142 | { | |
2143 | register Lisp_Object queue, first, second; | |
2144 | ||
2145 | /* Queue to unwind is current value of Vautoload_queue. | |
2146 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
2147 | queue = Vautoload_queue; | |
2148 | Vautoload_queue = oldqueue; | |
2149 | while (CONSP (queue)) | |
2150 | { | |
e509f168 | 2151 | first = XCAR (queue); |
db9f0278 JB |
2152 | second = Fcdr (first); |
2153 | first = Fcar (first); | |
47b82df9 RS |
2154 | if (EQ (first, make_number (0))) |
2155 | Vfeatures = second; | |
db9f0278 JB |
2156 | else |
2157 | Ffset (first, second); | |
e509f168 | 2158 | queue = XCDR (queue); |
db9f0278 JB |
2159 | } |
2160 | return Qnil; | |
2161 | } | |
2162 | ||
ca20916b RS |
2163 | /* Load an autoloaded function. |
2164 | FUNNAME is the symbol which is the function's name. | |
2165 | FUNDEF is the autoload definition (a list). */ | |
2166 | ||
045ba794 | 2167 | void |
db9f0278 JB |
2168 | do_autoload (fundef, funname) |
2169 | Lisp_Object fundef, funname; | |
2170 | { | |
aed13378 | 2171 | int count = SPECPDL_INDEX (); |
d945992e | 2172 | Lisp_Object fun; |
ca20916b | 2173 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 | 2174 | |
aea6173f RS |
2175 | /* This is to make sure that loadup.el gives a clear picture |
2176 | of what files are preloaded and when. */ | |
ab4db096 RS |
2177 | if (! NILP (Vpurify_flag)) |
2178 | error ("Attempt to autoload %s while preparing to dump", | |
d5db4077 | 2179 | SDATA (SYMBOL_NAME (funname))); |
ab4db096 | 2180 | |
db9f0278 | 2181 | fun = funname; |
b7826503 | 2182 | CHECK_SYMBOL (funname); |
ca20916b | 2183 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 2184 | |
f87740dc | 2185 | /* Preserve the match data. */ |
89f2614d | 2186 | record_unwind_save_match_data (); |
177c0ea7 | 2187 | |
a04ee161 RS |
2188 | /* If autoloading gets an error (which includes the error of failing |
2189 | to define the function being called), we use Vautoload_queue | |
2190 | to undo function definitions and `provide' calls made by | |
2191 | the function. We do this in the specific case of autoloading | |
2192 | because autoloading is not an explicit request "load this file", | |
2193 | but rather a request to "call this function". | |
2194 | ||
2195 | The value saved here is to be restored into Vautoload_queue. */ | |
db9f0278 JB |
2196 | record_unwind_protect (un_autoload, Vautoload_queue); |
2197 | Vautoload_queue = Qt; | |
7351b242 | 2198 | Fload (Fcar (Fcdr (fundef)), Qnil, Qt, Qnil, Qt); |
2a49b6e5 | 2199 | |
db9f0278 JB |
2200 | /* Once loading finishes, don't undo it. */ |
2201 | Vautoload_queue = Qt; | |
2202 | unbind_to (count, Qnil); | |
2203 | ||
a7f96a35 | 2204 | fun = Findirect_function (fun, Qnil); |
ffd56f97 | 2205 | |
76c2b0cc | 2206 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 | 2207 | error ("Autoloading failed to define function %s", |
d5db4077 | 2208 | SDATA (SYMBOL_NAME (funname))); |
ca20916b | 2209 | UNGCPRO; |
db9f0278 | 2210 | } |
4c576a83 | 2211 | |
db9f0278 JB |
2212 | \f |
2213 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
9dbc9081 PJ |
2214 | doc: /* Evaluate FORM and return its value. */) |
2215 | (form) | |
db9f0278 JB |
2216 | Lisp_Object form; |
2217 | { | |
2218 | Lisp_Object fun, val, original_fun, original_args; | |
2219 | Lisp_Object funcar; | |
2220 | struct backtrace backtrace; | |
2221 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2222 | ||
df470e3b | 2223 | if (handling_signal) |
48f8dfa3 | 2224 | abort (); |
177c0ea7 | 2225 | |
90165123 | 2226 | if (SYMBOLP (form)) |
2b9bde76 | 2227 | return Fsymbol_value (form); |
db9f0278 JB |
2228 | if (!CONSP (form)) |
2229 | return form; | |
2230 | ||
2231 | QUIT; | |
ee830945 RS |
2232 | if ((consing_since_gc > gc_cons_threshold |
2233 | && consing_since_gc > gc_relative_threshold) | |
2234 | || | |
2235 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
db9f0278 JB |
2236 | { |
2237 | GCPRO1 (form); | |
2238 | Fgarbage_collect (); | |
2239 | UNGCPRO; | |
2240 | } | |
2241 | ||
2242 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2243 | { | |
2244 | if (max_lisp_eval_depth < 100) | |
2245 | max_lisp_eval_depth = 100; | |
2246 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2247 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2248 | } |
2249 | ||
2250 | original_fun = Fcar (form); | |
2251 | original_args = Fcdr (form); | |
2252 | ||
2253 | backtrace.next = backtrace_list; | |
2254 | backtrace_list = &backtrace; | |
2255 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
2256 | backtrace.args = &original_args; | |
2257 | backtrace.nargs = UNEVALLED; | |
2258 | backtrace.evalargs = 1; | |
2259 | backtrace.debug_on_exit = 0; | |
2260 | ||
2261 | if (debug_on_next_call) | |
2262 | do_debug_on_call (Qt); | |
2263 | ||
2264 | /* At this point, only original_fun and original_args | |
2265 | have values that will be used below */ | |
2266 | retry: | |
8788120f KS |
2267 | |
2268 | /* Optimize for no indirection. */ | |
2269 | fun = original_fun; | |
2270 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2271 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2272 | fun = indirect_function (fun); | |
db9f0278 | 2273 | |
90165123 | 2274 | if (SUBRP (fun)) |
db9f0278 JB |
2275 | { |
2276 | Lisp_Object numargs; | |
166c822d | 2277 | Lisp_Object argvals[8]; |
db9f0278 JB |
2278 | Lisp_Object args_left; |
2279 | register int i, maxargs; | |
2280 | ||
2281 | args_left = original_args; | |
2282 | numargs = Flength (args_left); | |
2283 | ||
c1788fbc RS |
2284 | CHECK_CONS_LIST (); |
2285 | ||
db9f0278 JB |
2286 | if (XINT (numargs) < XSUBR (fun)->min_args || |
2287 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
734d55a2 | 2288 | xsignal2 (Qwrong_number_of_arguments, original_fun, numargs); |
db9f0278 JB |
2289 | |
2290 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2291 | { | |
2292 | backtrace.evalargs = 0; | |
2293 | val = (*XSUBR (fun)->function) (args_left); | |
2294 | goto done; | |
2295 | } | |
2296 | ||
2297 | if (XSUBR (fun)->max_args == MANY) | |
2298 | { | |
2299 | /* Pass a vector of evaluated arguments */ | |
2300 | Lisp_Object *vals; | |
2301 | register int argnum = 0; | |
2302 | ||
2303 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2304 | ||
2305 | GCPRO3 (args_left, fun, fun); | |
2306 | gcpro3.var = vals; | |
2307 | gcpro3.nvars = 0; | |
2308 | ||
265a9e55 | 2309 | while (!NILP (args_left)) |
db9f0278 JB |
2310 | { |
2311 | vals[argnum++] = Feval (Fcar (args_left)); | |
2312 | args_left = Fcdr (args_left); | |
2313 | gcpro3.nvars = argnum; | |
2314 | } | |
db9f0278 JB |
2315 | |
2316 | backtrace.args = vals; | |
2317 | backtrace.nargs = XINT (numargs); | |
2318 | ||
2319 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 2320 | UNGCPRO; |
db9f0278 JB |
2321 | goto done; |
2322 | } | |
2323 | ||
2324 | GCPRO3 (args_left, fun, fun); | |
2325 | gcpro3.var = argvals; | |
2326 | gcpro3.nvars = 0; | |
2327 | ||
2328 | maxargs = XSUBR (fun)->max_args; | |
2329 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
2330 | { | |
2331 | argvals[i] = Feval (Fcar (args_left)); | |
2332 | gcpro3.nvars = ++i; | |
2333 | } | |
2334 | ||
2335 | UNGCPRO; | |
2336 | ||
2337 | backtrace.args = argvals; | |
2338 | backtrace.nargs = XINT (numargs); | |
2339 | ||
2340 | switch (i) | |
2341 | { | |
2342 | case 0: | |
2343 | val = (*XSUBR (fun)->function) (); | |
2344 | goto done; | |
2345 | case 1: | |
2346 | val = (*XSUBR (fun)->function) (argvals[0]); | |
2347 | goto done; | |
2348 | case 2: | |
2349 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
2350 | goto done; | |
2351 | case 3: | |
2352 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2353 | argvals[2]); | |
2354 | goto done; | |
2355 | case 4: | |
2356 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2357 | argvals[2], argvals[3]); | |
2358 | goto done; | |
2359 | case 5: | |
2360 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2361 | argvals[3], argvals[4]); | |
2362 | goto done; | |
2363 | case 6: | |
2364 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2365 | argvals[3], argvals[4], argvals[5]); | |
2366 | goto done; | |
15c65264 RS |
2367 | case 7: |
2368 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2369 | argvals[3], argvals[4], argvals[5], | |
2370 | argvals[6]); | |
2371 | goto done; | |
db9f0278 | 2372 | |
166c822d KH |
2373 | case 8: |
2374 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2375 | argvals[3], argvals[4], argvals[5], | |
2376 | argvals[6], argvals[7]); | |
2377 | goto done; | |
2378 | ||
db9f0278 | 2379 | default: |
08564963 JB |
2380 | /* Someone has created a subr that takes more arguments than |
2381 | is supported by this code. We need to either rewrite the | |
2382 | subr to use a different argument protocol, or add more | |
2383 | cases to this switch. */ | |
2384 | abort (); | |
db9f0278 JB |
2385 | } |
2386 | } | |
90165123 | 2387 | if (COMPILEDP (fun)) |
db9f0278 JB |
2388 | val = apply_lambda (fun, original_args, 1); |
2389 | else | |
2390 | { | |
8788120f | 2391 | if (EQ (fun, Qunbound)) |
734d55a2 | 2392 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 2393 | if (!CONSP (fun)) |
734d55a2 KS |
2394 | xsignal1 (Qinvalid_function, original_fun); |
2395 | funcar = XCAR (fun); | |
90165123 | 2396 | if (!SYMBOLP (funcar)) |
734d55a2 | 2397 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2398 | if (EQ (funcar, Qautoload)) |
2399 | { | |
2400 | do_autoload (fun, original_fun); | |
2401 | goto retry; | |
2402 | } | |
2403 | if (EQ (funcar, Qmacro)) | |
2404 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
2405 | else if (EQ (funcar, Qlambda)) | |
2406 | val = apply_lambda (fun, original_args, 1); | |
db9f0278 | 2407 | else |
734d55a2 | 2408 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2409 | } |
2410 | done: | |
c1788fbc RS |
2411 | CHECK_CONS_LIST (); |
2412 | ||
db9f0278 JB |
2413 | lisp_eval_depth--; |
2414 | if (backtrace.debug_on_exit) | |
2415 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2416 | backtrace_list = backtrace.next; | |
824eb35e | 2417 | |
db9f0278 JB |
2418 | return val; |
2419 | } | |
2420 | \f | |
2421 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
9dbc9081 PJ |
2422 | doc: /* Call FUNCTION with our remaining args, using our last arg as list of args. |
2423 | Then return the value FUNCTION returns. | |
2424 | Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
2425 | usage: (apply FUNCTION &rest ARGUMENTS) */) | |
2426 | (nargs, args) | |
db9f0278 JB |
2427 | int nargs; |
2428 | Lisp_Object *args; | |
2429 | { | |
2430 | register int i, numargs; | |
2431 | register Lisp_Object spread_arg; | |
2432 | register Lisp_Object *funcall_args; | |
db9f0278 | 2433 | Lisp_Object fun; |
96d44c64 | 2434 | struct gcpro gcpro1; |
db9f0278 JB |
2435 | |
2436 | fun = args [0]; | |
2437 | funcall_args = 0; | |
2438 | spread_arg = args [nargs - 1]; | |
b7826503 | 2439 | CHECK_LIST (spread_arg); |
177c0ea7 | 2440 | |
db9f0278 JB |
2441 | numargs = XINT (Flength (spread_arg)); |
2442 | ||
2443 | if (numargs == 0) | |
2444 | return Ffuncall (nargs - 1, args); | |
2445 | else if (numargs == 1) | |
2446 | { | |
03699b14 | 2447 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2448 | return Ffuncall (nargs, args); |
2449 | } | |
2450 | ||
a6e3fa71 | 2451 | numargs += nargs - 2; |
db9f0278 | 2452 | |
8788120f KS |
2453 | /* Optimize for no indirection. */ |
2454 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2455 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2456 | fun = indirect_function (fun); | |
ffd56f97 | 2457 | if (EQ (fun, Qunbound)) |
db9f0278 | 2458 | { |
ffd56f97 JB |
2459 | /* Let funcall get the error */ |
2460 | fun = args[0]; | |
2461 | goto funcall; | |
db9f0278 JB |
2462 | } |
2463 | ||
90165123 | 2464 | if (SUBRP (fun)) |
db9f0278 JB |
2465 | { |
2466 | if (numargs < XSUBR (fun)->min_args | |
2467 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2468 | goto funcall; /* Let funcall get the error */ | |
2469 | else if (XSUBR (fun)->max_args > numargs) | |
2470 | { | |
2471 | /* Avoid making funcall cons up a yet another new vector of arguments | |
2472 | by explicitly supplying nil's for optional values */ | |
2473 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
2474 | * sizeof (Lisp_Object)); | |
2475 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
2476 | funcall_args[++i] = Qnil; | |
96d44c64 SM |
2477 | GCPRO1 (*funcall_args); |
2478 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2479 | } |
2480 | } | |
2481 | funcall: | |
2482 | /* We add 1 to numargs because funcall_args includes the | |
2483 | function itself as well as its arguments. */ | |
2484 | if (!funcall_args) | |
a6e3fa71 JB |
2485 | { |
2486 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
2487 | * sizeof (Lisp_Object)); | |
96d44c64 SM |
2488 | GCPRO1 (*funcall_args); |
2489 | gcpro1.nvars = 1 + numargs; | |
a6e3fa71 JB |
2490 | } |
2491 | ||
db9f0278 JB |
2492 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
2493 | /* Spread the last arg we got. Its first element goes in | |
2494 | the slot that it used to occupy, hence this value of I. */ | |
2495 | i = nargs - 1; | |
265a9e55 | 2496 | while (!NILP (spread_arg)) |
db9f0278 | 2497 | { |
03699b14 KR |
2498 | funcall_args [i++] = XCAR (spread_arg); |
2499 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2500 | } |
a6e3fa71 | 2501 | |
96d44c64 SM |
2502 | /* By convention, the caller needs to gcpro Ffuncall's args. */ |
2503 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
2504 | } |
2505 | \f | |
ff936e53 SM |
2506 | /* Run hook variables in various ways. */ |
2507 | ||
2508 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2901f1d1 SM |
2509 | static Lisp_Object run_hook_with_args P_ ((int, Lisp_Object *, |
2510 | enum run_hooks_condition)); | |
ff936e53 | 2511 | |
8b5176cd | 2512 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
9f685258 | 2513 | doc: /* Run each hook in HOOKS. |
9dbc9081 PJ |
2514 | Each argument should be a symbol, a hook variable. |
2515 | These symbols are processed in the order specified. | |
2516 | If a hook symbol has a non-nil value, that value may be a function | |
2517 | or a list of functions to be called to run the hook. | |
2518 | If the value is a function, it is called with no arguments. | |
2519 | If it is a list, the elements are called, in order, with no arguments. | |
2520 | ||
9f685258 LK |
2521 | Major modes should not use this function directly to run their mode |
2522 | hook; they should use `run-mode-hooks' instead. | |
2523 | ||
72e85d5d RS |
2524 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2525 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2526 | usage: (run-hooks &rest HOOKS) */) |
2527 | (nargs, args) | |
ff936e53 SM |
2528 | int nargs; |
2529 | Lisp_Object *args; | |
2530 | { | |
2531 | Lisp_Object hook[1]; | |
2532 | register int i; | |
2533 | ||
2534 | for (i = 0; i < nargs; i++) | |
2535 | { | |
2536 | hook[0] = args[i]; | |
2537 | run_hook_with_args (1, hook, to_completion); | |
2538 | } | |
2539 | ||
2540 | return Qnil; | |
2541 | } | |
177c0ea7 | 2542 | |
a0d76c27 | 2543 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
9dbc9081 PJ |
2544 | Srun_hook_with_args, 1, MANY, 0, |
2545 | doc: /* Run HOOK with the specified arguments ARGS. | |
2546 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
2547 | value, that value may be a function or a list of functions to be | |
2548 | called to run the hook. If the value is a function, it is called with | |
2549 | the given arguments and its return value is returned. If it is a list | |
2550 | of functions, those functions are called, in order, | |
2551 | with the given arguments ARGS. | |
d5e2c90c | 2552 | It is best not to depend on the value returned by `run-hook-with-args', |
9dbc9081 PJ |
2553 | as that may change. |
2554 | ||
72e85d5d RS |
2555 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2556 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2557 | usage: (run-hook-with-args HOOK &rest ARGS) */) |
2558 | (nargs, args) | |
ff936e53 SM |
2559 | int nargs; |
2560 | Lisp_Object *args; | |
2561 | { | |
2562 | return run_hook_with_args (nargs, args, to_completion); | |
2563 | } | |
2564 | ||
a0d76c27 | 2565 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
9dbc9081 PJ |
2566 | Srun_hook_with_args_until_success, 1, MANY, 0, |
2567 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2568 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2569 | value, that value may be a function or a list of functions to be | |
2570 | called to run the hook. If the value is a function, it is called with | |
2571 | the given arguments and its return value is returned. | |
2572 | If it is a list of functions, those functions are called, in order, | |
2573 | with the given arguments ARGS, until one of them | |
9dbc9081 | 2574 | returns a non-nil value. Then we return that value. |
d5e2c90c | 2575 | However, if they all return nil, we return nil. |
9dbc9081 | 2576 | |
72e85d5d RS |
2577 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2578 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2579 | usage: (run-hook-with-args-until-success HOOK &rest ARGS) */) |
2580 | (nargs, args) | |
b0b667cb KH |
2581 | int nargs; |
2582 | Lisp_Object *args; | |
2583 | { | |
ff936e53 SM |
2584 | return run_hook_with_args (nargs, args, until_success); |
2585 | } | |
2586 | ||
a0d76c27 | 2587 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
9dbc9081 PJ |
2588 | Srun_hook_with_args_until_failure, 1, MANY, 0, |
2589 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2590 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2591 | value, that value may be a function or a list of functions to be | |
2592 | called to run the hook. If the value is a function, it is called with | |
2593 | the given arguments and its return value is returned. | |
2594 | If it is a list of functions, those functions are called, in order, | |
2595 | with the given arguments ARGS, until one of them returns nil. | |
2596 | Then we return nil. However, if they all return non-nil, we return non-nil. | |
9dbc9081 | 2597 | |
72e85d5d RS |
2598 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2599 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2600 | usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */) |
2601 | (nargs, args) | |
ff936e53 SM |
2602 | int nargs; |
2603 | Lisp_Object *args; | |
2604 | { | |
2605 | return run_hook_with_args (nargs, args, until_failure); | |
2606 | } | |
2607 | ||
c933ea05 RS |
2608 | /* ARGS[0] should be a hook symbol. |
2609 | Call each of the functions in the hook value, passing each of them | |
2610 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2611 | COND specifies a condition to test after each call | |
2612 | to decide whether to stop. | |
2613 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2614 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2615 | ||
2901f1d1 | 2616 | static Lisp_Object |
ff936e53 SM |
2617 | run_hook_with_args (nargs, args, cond) |
2618 | int nargs; | |
2619 | Lisp_Object *args; | |
2620 | enum run_hooks_condition cond; | |
2621 | { | |
2622 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2623 | Lisp_Object globals; |
2624 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2625 | |
f029ca5f RS |
2626 | /* If we are dying or still initializing, |
2627 | don't do anything--it would probably crash if we tried. */ | |
2628 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2629 | return Qnil; |
f029ca5f | 2630 | |
b0b667cb | 2631 | sym = args[0]; |
aa681b51 | 2632 | val = find_symbol_value (sym); |
ff936e53 SM |
2633 | ret = (cond == until_failure ? Qt : Qnil); |
2634 | ||
b0b667cb | 2635 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2636 | return ret; |
03699b14 | 2637 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2638 | { |
2639 | args[0] = val; | |
2640 | return Ffuncall (nargs, args); | |
2641 | } | |
2642 | else | |
2643 | { | |
fada05d6 KH |
2644 | globals = Qnil; |
2645 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2646 | |
ff936e53 SM |
2647 | for (; |
2648 | CONSP (val) && ((cond == to_completion) | |
2649 | || (cond == until_success ? NILP (ret) | |
2650 | : !NILP (ret))); | |
03699b14 | 2651 | val = XCDR (val)) |
b0b667cb | 2652 | { |
03699b14 | 2653 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2654 | { |
2655 | /* t indicates this hook has a local binding; | |
2656 | it means to run the global binding too. */ | |
b0b667cb | 2657 | |
ff936e53 SM |
2658 | for (globals = Fdefault_value (sym); |
2659 | CONSP (globals) && ((cond == to_completion) | |
2660 | || (cond == until_success ? NILP (ret) | |
2661 | : !NILP (ret))); | |
03699b14 | 2662 | globals = XCDR (globals)) |
b0b667cb | 2663 | { |
03699b14 | 2664 | args[0] = XCAR (globals); |
77d92e05 RS |
2665 | /* In a global value, t should not occur. If it does, we |
2666 | must ignore it to avoid an endless loop. */ | |
2667 | if (!EQ (args[0], Qt)) | |
2668 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2669 | } |
2670 | } | |
2671 | else | |
2672 | { | |
03699b14 | 2673 | args[0] = XCAR (val); |
ff936e53 | 2674 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2675 | } |
2676 | } | |
cb9d21f8 RS |
2677 | |
2678 | UNGCPRO; | |
ff936e53 | 2679 | return ret; |
b0b667cb KH |
2680 | } |
2681 | } | |
c933ea05 RS |
2682 | |
2683 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2684 | present value of that symbol. | |
2685 | Call each element of FUNLIST, | |
2686 | passing each of them the rest of ARGS. | |
2687 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2688 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2689 | ||
2690 | Lisp_Object | |
2691 | run_hook_list_with_args (funlist, nargs, args) | |
2692 | Lisp_Object funlist; | |
2693 | int nargs; | |
2694 | Lisp_Object *args; | |
2695 | { | |
2696 | Lisp_Object sym; | |
2697 | Lisp_Object val; | |
fada05d6 KH |
2698 | Lisp_Object globals; |
2699 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2700 | |
2701 | sym = args[0]; | |
fada05d6 KH |
2702 | globals = Qnil; |
2703 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2704 | |
03699b14 | 2705 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2706 | { |
03699b14 | 2707 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2708 | { |
2709 | /* t indicates this hook has a local binding; | |
2710 | it means to run the global binding too. */ | |
c933ea05 RS |
2711 | |
2712 | for (globals = Fdefault_value (sym); | |
2713 | CONSP (globals); | |
03699b14 | 2714 | globals = XCDR (globals)) |
c933ea05 | 2715 | { |
03699b14 | 2716 | args[0] = XCAR (globals); |
77d92e05 RS |
2717 | /* In a global value, t should not occur. If it does, we |
2718 | must ignore it to avoid an endless loop. */ | |
2719 | if (!EQ (args[0], Qt)) | |
2720 | Ffuncall (nargs, args); | |
c933ea05 RS |
2721 | } |
2722 | } | |
2723 | else | |
2724 | { | |
03699b14 | 2725 | args[0] = XCAR (val); |
c933ea05 RS |
2726 | Ffuncall (nargs, args); |
2727 | } | |
2728 | } | |
2729 | UNGCPRO; | |
2730 | return Qnil; | |
2731 | } | |
7d48558f RS |
2732 | |
2733 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2734 | ||
2735 | void | |
2736 | run_hook_with_args_2 (hook, arg1, arg2) | |
2737 | Lisp_Object hook, arg1, arg2; | |
2738 | { | |
2739 | Lisp_Object temp[3]; | |
2740 | temp[0] = hook; | |
2741 | temp[1] = arg1; | |
2742 | temp[2] = arg2; | |
2743 | ||
2744 | Frun_hook_with_args (3, temp); | |
2745 | } | |
ff936e53 | 2746 | \f |
db9f0278 JB |
2747 | /* Apply fn to arg */ |
2748 | Lisp_Object | |
2749 | apply1 (fn, arg) | |
2750 | Lisp_Object fn, arg; | |
2751 | { | |
a6e3fa71 JB |
2752 | struct gcpro gcpro1; |
2753 | ||
2754 | GCPRO1 (fn); | |
265a9e55 | 2755 | if (NILP (arg)) |
a6e3fa71 JB |
2756 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2757 | gcpro1.nvars = 2; | |
db9f0278 JB |
2758 | #ifdef NO_ARG_ARRAY |
2759 | { | |
2760 | Lisp_Object args[2]; | |
2761 | args[0] = fn; | |
2762 | args[1] = arg; | |
a6e3fa71 JB |
2763 | gcpro1.var = args; |
2764 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2765 | } |
2766 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2767 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2768 | #endif /* not NO_ARG_ARRAY */ |
2769 | } | |
2770 | ||
2771 | /* Call function fn on no arguments */ | |
2772 | Lisp_Object | |
2773 | call0 (fn) | |
2774 | Lisp_Object fn; | |
2775 | { | |
a6e3fa71 JB |
2776 | struct gcpro gcpro1; |
2777 | ||
2778 | GCPRO1 (fn); | |
2779 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2780 | } |
2781 | ||
15285f9f | 2782 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2783 | /* ARGSUSED */ |
2784 | Lisp_Object | |
15285f9f RS |
2785 | call1 (fn, arg1) |
2786 | Lisp_Object fn, arg1; | |
db9f0278 | 2787 | { |
a6e3fa71 | 2788 | struct gcpro gcpro1; |
db9f0278 | 2789 | #ifdef NO_ARG_ARRAY |
177c0ea7 | 2790 | Lisp_Object args[2]; |
a6e3fa71 | 2791 | |
db9f0278 | 2792 | args[0] = fn; |
15285f9f | 2793 | args[1] = arg1; |
a6e3fa71 JB |
2794 | GCPRO1 (args[0]); |
2795 | gcpro1.nvars = 2; | |
2796 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2797 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2798 | GCPRO1 (fn); |
2799 | gcpro1.nvars = 2; | |
2800 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2801 | #endif /* not NO_ARG_ARRAY */ |
2802 | } | |
2803 | ||
15285f9f | 2804 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2805 | /* ARGSUSED */ |
2806 | Lisp_Object | |
15285f9f RS |
2807 | call2 (fn, arg1, arg2) |
2808 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2809 | { |
a6e3fa71 | 2810 | struct gcpro gcpro1; |
db9f0278 JB |
2811 | #ifdef NO_ARG_ARRAY |
2812 | Lisp_Object args[3]; | |
2813 | args[0] = fn; | |
15285f9f RS |
2814 | args[1] = arg1; |
2815 | args[2] = arg2; | |
a6e3fa71 JB |
2816 | GCPRO1 (args[0]); |
2817 | gcpro1.nvars = 3; | |
2818 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2819 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2820 | GCPRO1 (fn); |
2821 | gcpro1.nvars = 3; | |
2822 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2823 | #endif /* not NO_ARG_ARRAY */ |
2824 | } | |
2825 | ||
15285f9f | 2826 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2827 | /* ARGSUSED */ |
2828 | Lisp_Object | |
15285f9f RS |
2829 | call3 (fn, arg1, arg2, arg3) |
2830 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2831 | { |
a6e3fa71 | 2832 | struct gcpro gcpro1; |
db9f0278 JB |
2833 | #ifdef NO_ARG_ARRAY |
2834 | Lisp_Object args[4]; | |
2835 | args[0] = fn; | |
15285f9f RS |
2836 | args[1] = arg1; |
2837 | args[2] = arg2; | |
2838 | args[3] = arg3; | |
a6e3fa71 JB |
2839 | GCPRO1 (args[0]); |
2840 | gcpro1.nvars = 4; | |
2841 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2842 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2843 | GCPRO1 (fn); |
2844 | gcpro1.nvars = 4; | |
2845 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2846 | #endif /* not NO_ARG_ARRAY */ |
2847 | } | |
2848 | ||
15285f9f | 2849 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2850 | /* ARGSUSED */ |
2851 | Lisp_Object | |
15285f9f RS |
2852 | call4 (fn, arg1, arg2, arg3, arg4) |
2853 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2854 | { |
2855 | struct gcpro gcpro1; | |
2856 | #ifdef NO_ARG_ARRAY | |
2857 | Lisp_Object args[5]; | |
2858 | args[0] = fn; | |
15285f9f RS |
2859 | args[1] = arg1; |
2860 | args[2] = arg2; | |
2861 | args[3] = arg3; | |
2862 | args[4] = arg4; | |
a5a44b91 JB |
2863 | GCPRO1 (args[0]); |
2864 | gcpro1.nvars = 5; | |
2865 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2866 | #else /* not NO_ARG_ARRAY */ | |
2867 | GCPRO1 (fn); | |
2868 | gcpro1.nvars = 5; | |
2869 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2870 | #endif /* not NO_ARG_ARRAY */ | |
2871 | } | |
2872 | ||
15285f9f RS |
2873 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2874 | /* ARGSUSED */ | |
2875 | Lisp_Object | |
2876 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2877 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2878 | { | |
2879 | struct gcpro gcpro1; | |
2880 | #ifdef NO_ARG_ARRAY | |
2881 | Lisp_Object args[6]; | |
2882 | args[0] = fn; | |
2883 | args[1] = arg1; | |
2884 | args[2] = arg2; | |
2885 | args[3] = arg3; | |
2886 | args[4] = arg4; | |
2887 | args[5] = arg5; | |
2888 | GCPRO1 (args[0]); | |
2889 | gcpro1.nvars = 6; | |
2890 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2891 | #else /* not NO_ARG_ARRAY */ | |
2892 | GCPRO1 (fn); | |
2893 | gcpro1.nvars = 6; | |
2894 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2895 | #endif /* not NO_ARG_ARRAY */ | |
2896 | } | |
2897 | ||
2898 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2899 | /* ARGSUSED */ | |
2900 | Lisp_Object | |
2901 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2902 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2903 | { | |
2904 | struct gcpro gcpro1; | |
2905 | #ifdef NO_ARG_ARRAY | |
2906 | Lisp_Object args[7]; | |
2907 | args[0] = fn; | |
2908 | args[1] = arg1; | |
2909 | args[2] = arg2; | |
2910 | args[3] = arg3; | |
2911 | args[4] = arg4; | |
2912 | args[5] = arg5; | |
2913 | args[6] = arg6; | |
2914 | GCPRO1 (args[0]); | |
2915 | gcpro1.nvars = 7; | |
2916 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2917 | #else /* not NO_ARG_ARRAY */ | |
2918 | GCPRO1 (fn); | |
2919 | gcpro1.nvars = 7; | |
2920 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2921 | #endif /* not NO_ARG_ARRAY */ | |
2922 | } | |
2923 | ||
6c2ef893 RS |
2924 | /* The caller should GCPRO all the elements of ARGS. */ |
2925 | ||
db9f0278 | 2926 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
9dbc9081 PJ |
2927 | doc: /* Call first argument as a function, passing remaining arguments to it. |
2928 | Return the value that function returns. | |
2929 | Thus, (funcall 'cons 'x 'y) returns (x . y). | |
2930 | usage: (funcall FUNCTION &rest ARGUMENTS) */) | |
2931 | (nargs, args) | |
db9f0278 JB |
2932 | int nargs; |
2933 | Lisp_Object *args; | |
2934 | { | |
8788120f | 2935 | Lisp_Object fun, original_fun; |
db9f0278 JB |
2936 | Lisp_Object funcar; |
2937 | int numargs = nargs - 1; | |
2938 | Lisp_Object lisp_numargs; | |
2939 | Lisp_Object val; | |
2940 | struct backtrace backtrace; | |
2941 | register Lisp_Object *internal_args; | |
2942 | register int i; | |
2943 | ||
2944 | QUIT; | |
ee830945 RS |
2945 | if ((consing_since_gc > gc_cons_threshold |
2946 | && consing_since_gc > gc_relative_threshold) | |
2947 | || | |
2948 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
a6e3fa71 | 2949 | Fgarbage_collect (); |
db9f0278 JB |
2950 | |
2951 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2952 | { | |
2953 | if (max_lisp_eval_depth < 100) | |
2954 | max_lisp_eval_depth = 100; | |
2955 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2956 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2957 | } |
2958 | ||
2959 | backtrace.next = backtrace_list; | |
2960 | backtrace_list = &backtrace; | |
2961 | backtrace.function = &args[0]; | |
2962 | backtrace.args = &args[1]; | |
2963 | backtrace.nargs = nargs - 1; | |
2964 | backtrace.evalargs = 0; | |
2965 | backtrace.debug_on_exit = 0; | |
2966 | ||
2967 | if (debug_on_next_call) | |
2968 | do_debug_on_call (Qlambda); | |
2969 | ||
fff3ff9c KS |
2970 | CHECK_CONS_LIST (); |
2971 | ||
8788120f KS |
2972 | original_fun = args[0]; |
2973 | ||
db9f0278 JB |
2974 | retry: |
2975 | ||
8788120f KS |
2976 | /* Optimize for no indirection. */ |
2977 | fun = original_fun; | |
2978 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2979 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2980 | fun = indirect_function (fun); | |
db9f0278 | 2981 | |
90165123 | 2982 | if (SUBRP (fun)) |
db9f0278 | 2983 | { |
fff3ff9c | 2984 | if (numargs < XSUBR (fun)->min_args |
db9f0278 JB |
2985 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) |
2986 | { | |
a631e24c | 2987 | XSETFASTINT (lisp_numargs, numargs); |
734d55a2 | 2988 | xsignal2 (Qwrong_number_of_arguments, original_fun, lisp_numargs); |
db9f0278 JB |
2989 | } |
2990 | ||
2991 | if (XSUBR (fun)->max_args == UNEVALLED) | |
734d55a2 | 2992 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2993 | |
2994 | if (XSUBR (fun)->max_args == MANY) | |
2995 | { | |
2996 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
2997 | goto done; | |
2998 | } | |
2999 | ||
3000 | if (XSUBR (fun)->max_args > numargs) | |
3001 | { | |
3002 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
3003 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
3004 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
3005 | internal_args[i] = Qnil; | |
3006 | } | |
3007 | else | |
3008 | internal_args = args + 1; | |
3009 | switch (XSUBR (fun)->max_args) | |
3010 | { | |
3011 | case 0: | |
3012 | val = (*XSUBR (fun)->function) (); | |
3013 | goto done; | |
3014 | case 1: | |
3015 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
3016 | goto done; | |
3017 | case 2: | |
82fc29a1 | 3018 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1]); |
db9f0278 JB |
3019 | goto done; |
3020 | case 3: | |
3021 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3022 | internal_args[2]); | |
3023 | goto done; | |
3024 | case 4: | |
3025 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
82fc29a1 | 3026 | internal_args[2], internal_args[3]); |
db9f0278 JB |
3027 | goto done; |
3028 | case 5: | |
3029 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3030 | internal_args[2], internal_args[3], | |
3031 | internal_args[4]); | |
3032 | goto done; | |
3033 | case 6: | |
3034 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3035 | internal_args[2], internal_args[3], | |
3036 | internal_args[4], internal_args[5]); | |
3037 | goto done; | |
15c65264 RS |
3038 | case 7: |
3039 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3040 | internal_args[2], internal_args[3], | |
3041 | internal_args[4], internal_args[5], | |
3042 | internal_args[6]); | |
3043 | goto done; | |
db9f0278 | 3044 | |
166c822d KH |
3045 | case 8: |
3046 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3047 | internal_args[2], internal_args[3], | |
3048 | internal_args[4], internal_args[5], | |
3049 | internal_args[6], internal_args[7]); | |
3050 | goto done; | |
3051 | ||
db9f0278 | 3052 | default: |
70ee42f7 | 3053 | |
166c822d | 3054 | /* If a subr takes more than 8 arguments without using MANY |
177c0ea7 | 3055 | or UNEVALLED, we need to extend this function to support it. |
70ee42f7 JB |
3056 | Until this is done, there is no way to call the function. */ |
3057 | abort (); | |
db9f0278 JB |
3058 | } |
3059 | } | |
90165123 | 3060 | if (COMPILEDP (fun)) |
db9f0278 JB |
3061 | val = funcall_lambda (fun, numargs, args + 1); |
3062 | else | |
3063 | { | |
8788120f | 3064 | if (EQ (fun, Qunbound)) |
734d55a2 | 3065 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 3066 | if (!CONSP (fun)) |
734d55a2 KS |
3067 | xsignal1 (Qinvalid_function, original_fun); |
3068 | funcar = XCAR (fun); | |
90165123 | 3069 | if (!SYMBOLP (funcar)) |
734d55a2 | 3070 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3071 | if (EQ (funcar, Qlambda)) |
3072 | val = funcall_lambda (fun, numargs, args + 1); | |
db9f0278 JB |
3073 | else if (EQ (funcar, Qautoload)) |
3074 | { | |
8788120f | 3075 | do_autoload (fun, original_fun); |
fff3ff9c | 3076 | CHECK_CONS_LIST (); |
db9f0278 JB |
3077 | goto retry; |
3078 | } | |
3079 | else | |
734d55a2 | 3080 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3081 | } |
3082 | done: | |
c1788fbc | 3083 | CHECK_CONS_LIST (); |
db9f0278 JB |
3084 | lisp_eval_depth--; |
3085 | if (backtrace.debug_on_exit) | |
3086 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
3087 | backtrace_list = backtrace.next; | |
3088 | return val; | |
3089 | } | |
3090 | \f | |
3091 | Lisp_Object | |
3092 | apply_lambda (fun, args, eval_flag) | |
3093 | Lisp_Object fun, args; | |
3094 | int eval_flag; | |
3095 | { | |
3096 | Lisp_Object args_left; | |
3097 | Lisp_Object numargs; | |
3098 | register Lisp_Object *arg_vector; | |
3099 | struct gcpro gcpro1, gcpro2, gcpro3; | |
3100 | register int i; | |
3101 | register Lisp_Object tem; | |
3102 | ||
3103 | numargs = Flength (args); | |
3104 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
3105 | args_left = args; | |
3106 | ||
3107 | GCPRO3 (*arg_vector, args_left, fun); | |
3108 | gcpro1.nvars = 0; | |
3109 | ||
3110 | for (i = 0; i < XINT (numargs);) | |
3111 | { | |
3112 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
3113 | if (eval_flag) tem = Feval (tem); | |
3114 | arg_vector[i++] = tem; | |
3115 | gcpro1.nvars = i; | |
3116 | } | |
3117 | ||
3118 | UNGCPRO; | |
3119 | ||
3120 | if (eval_flag) | |
3121 | { | |
3122 | backtrace_list->args = arg_vector; | |
3123 | backtrace_list->nargs = i; | |
3124 | } | |
3125 | backtrace_list->evalargs = 0; | |
3126 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
3127 | ||
3128 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
3129 | if (backtrace_list->debug_on_exit) | |
3130 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
3131 | /* Don't do it again when we return to eval. */ | |
3132 | backtrace_list->debug_on_exit = 0; | |
3133 | return tem; | |
3134 | } | |
3135 | ||
3136 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
3137 | and return the result of evaluation. | |
3138 | FUN must be either a lambda-expression or a compiled-code object. */ | |
3139 | ||
2901f1d1 | 3140 | static Lisp_Object |
db9f0278 JB |
3141 | funcall_lambda (fun, nargs, arg_vector) |
3142 | Lisp_Object fun; | |
3143 | int nargs; | |
3144 | register Lisp_Object *arg_vector; | |
3145 | { | |
9ab90667 | 3146 | Lisp_Object val, syms_left, next; |
aed13378 | 3147 | int count = SPECPDL_INDEX (); |
9ab90667 | 3148 | int i, optional, rest; |
db9f0278 | 3149 | |
90165123 | 3150 | if (CONSP (fun)) |
9ab90667 GM |
3151 | { |
3152 | syms_left = XCDR (fun); | |
3153 | if (CONSP (syms_left)) | |
3154 | syms_left = XCAR (syms_left); | |
3155 | else | |
734d55a2 | 3156 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3157 | } |
90165123 | 3158 | else if (COMPILEDP (fun)) |
845975f5 | 3159 | syms_left = AREF (fun, COMPILED_ARGLIST); |
9ab90667 GM |
3160 | else |
3161 | abort (); | |
db9f0278 | 3162 | |
9ab90667 GM |
3163 | i = optional = rest = 0; |
3164 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
3165 | { |
3166 | QUIT; | |
177c0ea7 | 3167 | |
9ab90667 | 3168 | next = XCAR (syms_left); |
8788120f | 3169 | if (!SYMBOLP (next)) |
734d55a2 | 3170 | xsignal1 (Qinvalid_function, fun); |
177c0ea7 | 3171 | |
db9f0278 JB |
3172 | if (EQ (next, Qand_rest)) |
3173 | rest = 1; | |
3174 | else if (EQ (next, Qand_optional)) | |
3175 | optional = 1; | |
3176 | else if (rest) | |
3177 | { | |
9ffa21d4 | 3178 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
3179 | i = nargs; |
3180 | } | |
3181 | else if (i < nargs) | |
9ab90667 | 3182 | specbind (next, arg_vector[i++]); |
db9f0278 | 3183 | else if (!optional) |
734d55a2 | 3184 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 JB |
3185 | else |
3186 | specbind (next, Qnil); | |
3187 | } | |
3188 | ||
9ab90667 | 3189 | if (!NILP (syms_left)) |
734d55a2 | 3190 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3191 | else if (i < nargs) |
734d55a2 | 3192 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 | 3193 | |
90165123 | 3194 | if (CONSP (fun)) |
9ab90667 | 3195 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 3196 | else |
ca248607 RS |
3197 | { |
3198 | /* If we have not actually read the bytecode string | |
3199 | and constants vector yet, fetch them from the file. */ | |
845975f5 | 3200 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) |
661c7d6e | 3201 | Ffetch_bytecode (fun); |
845975f5 SM |
3202 | val = Fbyte_code (AREF (fun, COMPILED_BYTECODE), |
3203 | AREF (fun, COMPILED_CONSTANTS), | |
3204 | AREF (fun, COMPILED_STACK_DEPTH)); | |
ca248607 | 3205 | } |
177c0ea7 | 3206 | |
db9f0278 JB |
3207 | return unbind_to (count, val); |
3208 | } | |
661c7d6e KH |
3209 | |
3210 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
9dbc9081 PJ |
3211 | 1, 1, 0, |
3212 | doc: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */) | |
3213 | (object) | |
661c7d6e KH |
3214 | Lisp_Object object; |
3215 | { | |
3216 | Lisp_Object tem; | |
3217 | ||
845975f5 | 3218 | if (COMPILEDP (object) && CONSP (AREF (object, COMPILED_BYTECODE))) |
661c7d6e | 3219 | { |
845975f5 | 3220 | tem = read_doc_string (AREF (object, COMPILED_BYTECODE)); |
5bbdb090 | 3221 | if (!CONSP (tem)) |
845975f5 SM |
3222 | { |
3223 | tem = AREF (object, COMPILED_BYTECODE); | |
3224 | if (CONSP (tem) && STRINGP (XCAR (tem))) | |
d5db4077 | 3225 | error ("Invalid byte code in %s", SDATA (XCAR (tem))); |
845975f5 SM |
3226 | else |
3227 | error ("Invalid byte code"); | |
3228 | } | |
3ae565b3 SM |
3229 | ASET (object, COMPILED_BYTECODE, XCAR (tem)); |
3230 | ASET (object, COMPILED_CONSTANTS, XCDR (tem)); | |
661c7d6e KH |
3231 | } |
3232 | return object; | |
3233 | } | |
db9f0278 JB |
3234 | \f |
3235 | void | |
3236 | grow_specpdl () | |
3237 | { | |
aed13378 | 3238 | register int count = SPECPDL_INDEX (); |
db9f0278 JB |
3239 | if (specpdl_size >= max_specpdl_size) |
3240 | { | |
3241 | if (max_specpdl_size < 400) | |
3242 | max_specpdl_size = 400; | |
3243 | if (specpdl_size >= max_specpdl_size) | |
734d55a2 | 3244 | signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil); |
db9f0278 JB |
3245 | } |
3246 | specpdl_size *= 2; | |
3247 | if (specpdl_size > max_specpdl_size) | |
3248 | specpdl_size = max_specpdl_size; | |
3249 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
3250 | specpdl_ptr = specpdl + count; | |
3251 | } | |
3252 | ||
3253 | void | |
3254 | specbind (symbol, value) | |
3255 | Lisp_Object symbol, value; | |
3256 | { | |
19cebf5a | 3257 | Lisp_Object valcontents; |
db9f0278 | 3258 | |
b7826503 | 3259 | CHECK_SYMBOL (symbol); |
db9f0278 JB |
3260 | if (specpdl_ptr == specpdl + specpdl_size) |
3261 | grow_specpdl (); | |
719177b3 | 3262 | |
19cebf5a GM |
3263 | /* The most common case is that of a non-constant symbol with a |
3264 | trivial value. Make that as fast as we can. */ | |
3265 | valcontents = SYMBOL_VALUE (symbol); | |
3266 | if (!MISCP (valcontents) && !SYMBOL_CONSTANT_P (symbol)) | |
719177b3 | 3267 | { |
9ab90667 | 3268 | specpdl_ptr->symbol = symbol; |
19cebf5a | 3269 | specpdl_ptr->old_value = valcontents; |
9ab90667 GM |
3270 | specpdl_ptr->func = NULL; |
3271 | ++specpdl_ptr; | |
19cebf5a | 3272 | SET_SYMBOL_VALUE (symbol, value); |
719177b3 RS |
3273 | } |
3274 | else | |
9ab90667 | 3275 | { |
136eb6ed | 3276 | Lisp_Object ovalue = find_symbol_value (symbol); |
9ab90667 GM |
3277 | specpdl_ptr->func = 0; |
3278 | specpdl_ptr->old_value = ovalue; | |
719177b3 | 3279 | |
eb700b82 GM |
3280 | valcontents = XSYMBOL (symbol)->value; |
3281 | ||
3282 | if (BUFFER_LOCAL_VALUEP (valcontents) | |
eb700b82 | 3283 | || BUFFER_OBJFWDP (valcontents)) |
9ab90667 | 3284 | { |
0967b4b0 GM |
3285 | Lisp_Object where, current_buffer; |
3286 | ||
3287 | current_buffer = Fcurrent_buffer (); | |
177c0ea7 | 3288 | |
9ab90667 | 3289 | /* For a local variable, record both the symbol and which |
eb700b82 GM |
3290 | buffer's or frame's value we are saving. */ |
3291 | if (!NILP (Flocal_variable_p (symbol, Qnil))) | |
0967b4b0 | 3292 | where = current_buffer; |
67ee9f6e | 3293 | else if (BUFFER_LOCAL_VALUEP (valcontents) |
eb700b82 GM |
3294 | && XBUFFER_LOCAL_VALUE (valcontents)->found_for_frame) |
3295 | where = XBUFFER_LOCAL_VALUE (valcontents)->frame; | |
3296 | else | |
3297 | where = Qnil; | |
3298 | ||
3299 | /* We're not using the `unused' slot in the specbinding | |
3300 | structure because this would mean we have to do more | |
3301 | work for simple variables. */ | |
0967b4b0 | 3302 | specpdl_ptr->symbol = Fcons (symbol, Fcons (where, current_buffer)); |
06bccf8e GM |
3303 | |
3304 | /* If SYMBOL is a per-buffer variable which doesn't have a | |
3305 | buffer-local value here, make the `let' change the global | |
3306 | value by changing the value of SYMBOL in all buffers not | |
3307 | having their own value. This is consistent with what | |
3308 | happens with other buffer-local variables. */ | |
eb700b82 GM |
3309 | if (NILP (where) |
3310 | && BUFFER_OBJFWDP (valcontents)) | |
06bccf8e GM |
3311 | { |
3312 | ++specpdl_ptr; | |
3313 | Fset_default (symbol, value); | |
3314 | return; | |
3315 | } | |
9ab90667 GM |
3316 | } |
3317 | else | |
3318 | specpdl_ptr->symbol = symbol; | |
3319 | ||
3320 | specpdl_ptr++; | |
136eb6ed SM |
3321 | /* We used to do |
3322 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) | |
3323 | store_symval_forwarding (symbol, ovalue, value, NULL); | |
3324 | else | |
3325 | but ovalue comes from find_symbol_value which should never return | |
3326 | such an internal value. */ | |
3327 | eassert (!(BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue))); | |
3328 | set_internal (symbol, value, 0, 1); | |
9ab90667 | 3329 | } |
db9f0278 JB |
3330 | } |
3331 | ||
3332 | void | |
3333 | record_unwind_protect (function, arg) | |
1d159538 | 3334 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
3335 | Lisp_Object arg; |
3336 | { | |
9ba8e10d CY |
3337 | eassert (!handling_signal); |
3338 | ||
db9f0278 JB |
3339 | if (specpdl_ptr == specpdl + specpdl_size) |
3340 | grow_specpdl (); | |
3341 | specpdl_ptr->func = function; | |
3342 | specpdl_ptr->symbol = Qnil; | |
3343 | specpdl_ptr->old_value = arg; | |
3344 | specpdl_ptr++; | |
3345 | } | |
3346 | ||
3347 | Lisp_Object | |
3348 | unbind_to (count, value) | |
3349 | int count; | |
3350 | Lisp_Object value; | |
3351 | { | |
5a073f50 KS |
3352 | Lisp_Object quitf = Vquit_flag; |
3353 | struct gcpro gcpro1, gcpro2; | |
db9f0278 | 3354 | |
5a073f50 | 3355 | GCPRO2 (value, quitf); |
db9f0278 JB |
3356 | Vquit_flag = Qnil; |
3357 | ||
3358 | while (specpdl_ptr != specpdl + count) | |
3359 | { | |
611a8f8c RS |
3360 | /* Copy the binding, and decrement specpdl_ptr, before we do |
3361 | the work to unbind it. We decrement first | |
3362 | so that an error in unbinding won't try to unbind | |
3363 | the same entry again, and we copy the binding first | |
3364 | in case more bindings are made during some of the code we run. */ | |
eb700b82 | 3365 | |
45f266dc DL |
3366 | struct specbinding this_binding; |
3367 | this_binding = *--specpdl_ptr; | |
611a8f8c RS |
3368 | |
3369 | if (this_binding.func != 0) | |
3370 | (*this_binding.func) (this_binding.old_value); | |
0967b4b0 GM |
3371 | /* If the symbol is a list, it is really (SYMBOL WHERE |
3372 | . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a | |
3373 | frame. If WHERE is a buffer or frame, this indicates we | |
1b1acc13 PJ |
3374 | bound a variable that had a buffer-local or frame-local |
3375 | binding. WHERE nil means that the variable had the default | |
0967b4b0 GM |
3376 | value when it was bound. CURRENT-BUFFER is the buffer that |
3377 | was current when the variable was bound. */ | |
611a8f8c | 3378 | else if (CONSP (this_binding.symbol)) |
719177b3 | 3379 | { |
eb700b82 | 3380 | Lisp_Object symbol, where; |
719177b3 | 3381 | |
611a8f8c RS |
3382 | symbol = XCAR (this_binding.symbol); |
3383 | where = XCAR (XCDR (this_binding.symbol)); | |
719177b3 | 3384 | |
eb700b82 | 3385 | if (NILP (where)) |
611a8f8c | 3386 | Fset_default (symbol, this_binding.old_value); |
eb700b82 | 3387 | else if (BUFFERP (where)) |
611a8f8c | 3388 | set_internal (symbol, this_binding.old_value, XBUFFER (where), 1); |
177c0ea7 | 3389 | else |
611a8f8c | 3390 | set_internal (symbol, this_binding.old_value, NULL, 1); |
719177b3 | 3391 | } |
db9f0278 | 3392 | else |
9ab90667 GM |
3393 | { |
3394 | /* If variable has a trivial value (no forwarding), we can | |
3395 | just set it. No need to check for constant symbols here, | |
3396 | since that was already done by specbind. */ | |
611a8f8c RS |
3397 | if (!MISCP (SYMBOL_VALUE (this_binding.symbol))) |
3398 | SET_SYMBOL_VALUE (this_binding.symbol, this_binding.old_value); | |
9ab90667 | 3399 | else |
611a8f8c | 3400 | set_internal (this_binding.symbol, this_binding.old_value, 0, 1); |
9ab90667 | 3401 | } |
db9f0278 | 3402 | } |
177c0ea7 | 3403 | |
5a073f50 KS |
3404 | if (NILP (Vquit_flag) && !NILP (quitf)) |
3405 | Vquit_flag = quitf; | |
db9f0278 JB |
3406 | |
3407 | UNGCPRO; | |
db9f0278 JB |
3408 | return value; |
3409 | } | |
3410 | \f | |
db9f0278 | 3411 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, |
9dbc9081 PJ |
3412 | doc: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. |
3413 | The debugger is entered when that frame exits, if the flag is non-nil. */) | |
3414 | (level, flag) | |
db9f0278 JB |
3415 | Lisp_Object level, flag; |
3416 | { | |
3417 | register struct backtrace *backlist = backtrace_list; | |
3418 | register int i; | |
3419 | ||
b7826503 | 3420 | CHECK_NUMBER (level); |
db9f0278 JB |
3421 | |
3422 | for (i = 0; backlist && i < XINT (level); i++) | |
3423 | { | |
3424 | backlist = backlist->next; | |
3425 | } | |
3426 | ||
3427 | if (backlist) | |
265a9e55 | 3428 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
3429 | |
3430 | return flag; | |
3431 | } | |
3432 | ||
3433 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
9dbc9081 PJ |
3434 | doc: /* Print a trace of Lisp function calls currently active. |
3435 | Output stream used is value of `standard-output'. */) | |
3436 | () | |
db9f0278 JB |
3437 | { |
3438 | register struct backtrace *backlist = backtrace_list; | |
3439 | register int i; | |
3440 | Lisp_Object tail; | |
3441 | Lisp_Object tem; | |
3442 | extern Lisp_Object Vprint_level; | |
3443 | struct gcpro gcpro1; | |
3444 | ||
a631e24c | 3445 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
3446 | |
3447 | tail = Qnil; | |
3448 | GCPRO1 (tail); | |
3449 | ||
3450 | while (backlist) | |
3451 | { | |
3452 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
3453 | if (backlist->nargs == UNEVALLED) | |
3454 | { | |
3455 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 3456 | write_string ("\n", -1); |
db9f0278 JB |
3457 | } |
3458 | else | |
3459 | { | |
3460 | tem = *backlist->function; | |
3461 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
3462 | write_string ("(", -1); | |
3463 | if (backlist->nargs == MANY) | |
3464 | { | |
3465 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 3466 | !NILP (tail); |
db9f0278 JB |
3467 | tail = Fcdr (tail), i++) |
3468 | { | |
3469 | if (i) write_string (" ", -1); | |
3470 | Fprin1 (Fcar (tail), Qnil); | |
3471 | } | |
3472 | } | |
3473 | else | |
3474 | { | |
3475 | for (i = 0; i < backlist->nargs; i++) | |
3476 | { | |
3477 | if (i) write_string (" ", -1); | |
3478 | Fprin1 (backlist->args[i], Qnil); | |
3479 | } | |
3480 | } | |
b6703b02 | 3481 | write_string (")\n", -1); |
db9f0278 | 3482 | } |
db9f0278 JB |
3483 | backlist = backlist->next; |
3484 | } | |
3485 | ||
3486 | Vprint_level = Qnil; | |
3487 | UNGCPRO; | |
3488 | return Qnil; | |
3489 | } | |
3490 | ||
17401c97 | 3491 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
9dbc9081 PJ |
3492 | doc: /* Return the function and arguments NFRAMES up from current execution point. |
3493 | If that frame has not evaluated the arguments yet (or is a special form), | |
3494 | the value is (nil FUNCTION ARG-FORMS...). | |
3495 | If that frame has evaluated its arguments and called its function already, | |
3496 | the value is (t FUNCTION ARG-VALUES...). | |
3497 | A &rest arg is represented as the tail of the list ARG-VALUES. | |
3498 | FUNCTION is whatever was supplied as car of evaluated list, | |
3499 | or a lambda expression for macro calls. | |
3500 | If NFRAMES is more than the number of frames, the value is nil. */) | |
3501 | (nframes) | |
db9f0278 JB |
3502 | Lisp_Object nframes; |
3503 | { | |
3504 | register struct backtrace *backlist = backtrace_list; | |
3505 | register int i; | |
3506 | Lisp_Object tem; | |
3507 | ||
b7826503 | 3508 | CHECK_NATNUM (nframes); |
db9f0278 JB |
3509 | |
3510 | /* Find the frame requested. */ | |
b6703b02 | 3511 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
3512 | backlist = backlist->next; |
3513 | ||
3514 | if (!backlist) | |
3515 | return Qnil; | |
3516 | if (backlist->nargs == UNEVALLED) | |
3517 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
3518 | else | |
3519 | { | |
3520 | if (backlist->nargs == MANY) | |
3521 | tem = *backlist->args; | |
3522 | else | |
3523 | tem = Flist (backlist->nargs, backlist->args); | |
3524 | ||
3525 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3526 | } | |
3527 | } | |
a2ff3819 | 3528 | |
db9f0278 | 3529 | \f |
4ce0541e SM |
3530 | void |
3531 | mark_backtrace () | |
3532 | { | |
3533 | register struct backtrace *backlist; | |
3534 | register int i; | |
3535 | ||
3536 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
3537 | { | |
3538 | mark_object (*backlist->function); | |
3539 | ||
3540 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
3541 | i = 0; | |
3542 | else | |
3543 | i = backlist->nargs - 1; | |
3544 | for (; i >= 0; i--) | |
3545 | mark_object (backlist->args[i]); | |
3546 | } | |
3547 | } | |
3548 | ||
dfcf069d | 3549 | void |
db9f0278 JB |
3550 | syms_of_eval () |
3551 | { | |
3552 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
82fc29a1 | 3553 | doc: /* *Limit on number of Lisp variable bindings and `unwind-protect's. |
9f5903bb | 3554 | If Lisp code tries to increase the total number past this amount, |
2520dc0c RS |
3555 | an error is signaled. |
3556 | You can safely use a value considerably larger than the default value, | |
3557 | if that proves inconveniently small. However, if you increase it too far, | |
3558 | Emacs could run out of memory trying to make the stack bigger. */); | |
db9f0278 JB |
3559 | |
3560 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
9dbc9081 | 3561 | doc: /* *Limit on depth in `eval', `apply' and `funcall' before error. |
2520dc0c RS |
3562 | |
3563 | This limit serves to catch infinite recursions for you before they cause | |
9dbc9081 PJ |
3564 | actual stack overflow in C, which would be fatal for Emacs. |
3565 | You can safely make it considerably larger than its default value, | |
2520dc0c RS |
3566 | if that proves inconveniently small. However, if you increase it too far, |
3567 | Emacs could overflow the real C stack, and crash. */); | |
db9f0278 JB |
3568 | |
3569 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
9dbc9081 | 3570 | doc: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil. |
42ed718e RS |
3571 | If the value is t, that means do an ordinary quit. |
3572 | If the value equals `throw-on-input', that means quit by throwing | |
3573 | to the tag specified in `throw-on-input'; it's for handling `while-no-input'. | |
3574 | Typing C-g sets `quit-flag' to t, regardless of `inhibit-quit', | |
3575 | but `inhibit-quit' non-nil prevents anything from taking notice of that. */); | |
db9f0278 JB |
3576 | Vquit_flag = Qnil; |
3577 | ||
3578 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
9dbc9081 PJ |
3579 | doc: /* Non-nil inhibits C-g quitting from happening immediately. |
3580 | Note that `quit-flag' will still be set by typing C-g, | |
3581 | so a quit will be signaled as soon as `inhibit-quit' is nil. | |
3582 | To prevent this happening, set `quit-flag' to nil | |
3583 | before making `inhibit-quit' nil. */); | |
db9f0278 JB |
3584 | Vinhibit_quit = Qnil; |
3585 | ||
ad236261 JB |
3586 | Qinhibit_quit = intern ("inhibit-quit"); |
3587 | staticpro (&Qinhibit_quit); | |
3588 | ||
db9f0278 JB |
3589 | Qautoload = intern ("autoload"); |
3590 | staticpro (&Qautoload); | |
3591 | ||
3592 | Qdebug_on_error = intern ("debug-on-error"); | |
3593 | staticpro (&Qdebug_on_error); | |
3594 | ||
3595 | Qmacro = intern ("macro"); | |
3596 | staticpro (&Qmacro); | |
3597 | ||
d6edd563 GM |
3598 | Qdeclare = intern ("declare"); |
3599 | staticpro (&Qdeclare); | |
177c0ea7 | 3600 | |
db9f0278 JB |
3601 | /* Note that the process handling also uses Qexit, but we don't want |
3602 | to staticpro it twice, so we just do it here. */ | |
3603 | Qexit = intern ("exit"); | |
3604 | staticpro (&Qexit); | |
3605 | ||
3606 | Qinteractive = intern ("interactive"); | |
3607 | staticpro (&Qinteractive); | |
3608 | ||
3609 | Qcommandp = intern ("commandp"); | |
3610 | staticpro (&Qcommandp); | |
3611 | ||
3612 | Qdefun = intern ("defun"); | |
3613 | staticpro (&Qdefun); | |
3614 | ||
3615 | Qand_rest = intern ("&rest"); | |
3616 | staticpro (&Qand_rest); | |
3617 | ||
3618 | Qand_optional = intern ("&optional"); | |
3619 | staticpro (&Qand_optional); | |
3620 | ||
f01cbfdd RS |
3621 | Qdebug = intern ("debug"); |
3622 | staticpro (&Qdebug); | |
3623 | ||
128c0f66 | 3624 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
704788b3 RS |
3625 | doc: /* *Non-nil means errors display a backtrace buffer. |
3626 | More precisely, this happens for any error that is handled | |
3627 | by the editor command loop. | |
9dbc9081 PJ |
3628 | If the value is a list, an error only means to display a backtrace |
3629 | if one of its condition symbols appears in the list. */); | |
128c0f66 | 3630 | Vstack_trace_on_error = Qnil; |
db9f0278 | 3631 | |
128c0f66 | 3632 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
9dbc9081 PJ |
3633 | doc: /* *Non-nil means enter debugger if an error is signaled. |
3634 | Does not apply to errors handled by `condition-case' or those | |
3635 | matched by `debug-ignored-errors'. | |
3636 | If the value is a list, an error only means to enter the debugger | |
3637 | if one of its condition symbols appears in the list. | |
3638 | When you evaluate an expression interactively, this variable | |
3639 | is temporarily non-nil if `eval-expression-debug-on-error' is non-nil. | |
fbbdcf2f CY |
3640 | The command `toggle-debug-on-error' toggles this. |
3641 | See also the variable `debug-on-quit'. */); | |
128c0f66 | 3642 | Vdebug_on_error = Qnil; |
db9f0278 | 3643 | |
fc950e09 | 3644 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
9dbc9081 PJ |
3645 | doc: /* *List of errors for which the debugger should not be called. |
3646 | Each element may be a condition-name or a regexp that matches error messages. | |
3647 | If any element applies to a given error, that error skips the debugger | |
3648 | and just returns to top level. | |
3649 | This overrides the variable `debug-on-error'. | |
3650 | It does not apply to errors handled by `condition-case'. */); | |
fc950e09 KH |
3651 | Vdebug_ignored_errors = Qnil; |
3652 | ||
db9f0278 | 3653 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
82fc29a1 JB |
3654 | doc: /* *Non-nil means enter debugger if quit is signaled (C-g, for example). |
3655 | Does not apply if quit is handled by a `condition-case'. */); | |
db9f0278 JB |
3656 | debug_on_quit = 0; |
3657 | ||
3658 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
9dbc9081 | 3659 | doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */); |
db9f0278 | 3660 | |
556d7314 | 3661 | DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue, |
9dbc9081 PJ |
3662 | doc: /* Non-nil means debugger may continue execution. |
3663 | This is nil when the debugger is called under circumstances where it | |
3664 | might not be safe to continue. */); | |
dac204bc | 3665 | debugger_may_continue = 1; |
556d7314 | 3666 | |
db9f0278 | 3667 | DEFVAR_LISP ("debugger", &Vdebugger, |
9dbc9081 PJ |
3668 | doc: /* Function to call to invoke debugger. |
3669 | If due to frame exit, args are `exit' and the value being returned; | |
3670 | this function's value will be returned instead of that. | |
3671 | If due to error, args are `error' and a list of the args to `signal'. | |
3672 | If due to `apply' or `funcall' entry, one arg, `lambda'. | |
3673 | If due to `eval' entry, one arg, t. */); | |
db9f0278 JB |
3674 | Vdebugger = Qnil; |
3675 | ||
61ede770 | 3676 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
9dbc9081 PJ |
3677 | doc: /* If non-nil, this is a function for `signal' to call. |
3678 | It receives the same arguments that `signal' was given. | |
3679 | The Edebug package uses this to regain control. */); | |
61ede770 RS |
3680 | Vsignal_hook_function = Qnil; |
3681 | ||
57a6e758 | 3682 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
9dbc9081 PJ |
3683 | doc: /* *Non-nil means call the debugger regardless of condition handlers. |
3684 | Note that `debug-on-error', `debug-on-quit' and friends | |
3685 | still determine whether to handle the particular condition. */); | |
57a6e758 | 3686 | Vdebug_on_signal = Qnil; |
61ede770 | 3687 | |
d6edd563 GM |
3688 | DEFVAR_LISP ("macro-declaration-function", &Vmacro_declaration_function, |
3689 | doc: /* Function to process declarations in a macro definition. | |
3690 | The function will be called with two args MACRO and DECL. | |
3691 | MACRO is the name of the macro being defined. | |
3692 | DECL is a list `(declare ...)' containing the declarations. | |
3693 | The value the function returns is not used. */); | |
3694 | Vmacro_declaration_function = Qnil; | |
3695 | ||
6e6e9f08 RS |
3696 | Vrun_hooks = intern ("run-hooks"); |
3697 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3698 | |
3699 | staticpro (&Vautoload_queue); | |
3700 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3701 | staticpro (&Vsignaling_function); |
3702 | Vsignaling_function = Qnil; | |
db9f0278 JB |
3703 | |
3704 | defsubr (&Sor); | |
3705 | defsubr (&Sand); | |
3706 | defsubr (&Sif); | |
3707 | defsubr (&Scond); | |
3708 | defsubr (&Sprogn); | |
3709 | defsubr (&Sprog1); | |
3710 | defsubr (&Sprog2); | |
3711 | defsubr (&Ssetq); | |
3712 | defsubr (&Squote); | |
3713 | defsubr (&Sfunction); | |
3714 | defsubr (&Sdefun); | |
3715 | defsubr (&Sdefmacro); | |
3716 | defsubr (&Sdefvar); | |
19cebf5a | 3717 | defsubr (&Sdefvaralias); |
db9f0278 JB |
3718 | defsubr (&Sdefconst); |
3719 | defsubr (&Suser_variable_p); | |
3720 | defsubr (&Slet); | |
3721 | defsubr (&SletX); | |
3722 | defsubr (&Swhile); | |
3723 | defsubr (&Smacroexpand); | |
3724 | defsubr (&Scatch); | |
3725 | defsubr (&Sthrow); | |
3726 | defsubr (&Sunwind_protect); | |
3727 | defsubr (&Scondition_case); | |
3728 | defsubr (&Ssignal); | |
3729 | defsubr (&Sinteractive_p); | |
4b664e76 | 3730 | defsubr (&Scalled_interactively_p); |
db9f0278 JB |
3731 | defsubr (&Scommandp); |
3732 | defsubr (&Sautoload); | |
3733 | defsubr (&Seval); | |
3734 | defsubr (&Sapply); | |
3735 | defsubr (&Sfuncall); | |
ff936e53 SM |
3736 | defsubr (&Srun_hooks); |
3737 | defsubr (&Srun_hook_with_args); | |
3738 | defsubr (&Srun_hook_with_args_until_success); | |
3739 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3740 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3741 | defsubr (&Sbacktrace_debug); |
3742 | defsubr (&Sbacktrace); | |
3743 | defsubr (&Sbacktrace_frame); | |
3744 | } | |
ab5796a9 MB |
3745 | |
3746 | /* arch-tag: 014a07aa-33ab-4a8f-a3d2-ee8a4a9ff7fb | |
3747 | (do not change this comment) */ |