Commit | Line | Data |
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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, |
4e6835db | 3 | 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
db9f0278 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
684d6f5b | 9 | the Free Software Foundation; either version 3, or (at your option) |
db9f0278 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
db9f0278 JB |
21 | |
22 | ||
18160b98 | 23 | #include <config.h> |
db9f0278 | 24 | #include "lisp.h" |
9ac0d9e0 | 25 | #include "blockinput.h" |
db9f0278 | 26 | #include "commands.h" |
1f98fa48 | 27 | #include "keyboard.h" |
3648c842 | 28 | #include "dispextern.h" |
db9f0278 JB |
29 | #include <setjmp.h> |
30 | ||
b70e1a2b SM |
31 | #if HAVE_X_WINDOWS |
32 | #include "xterm.h" | |
33 | #endif | |
34 | ||
db9f0278 JB |
35 | /* This definition is duplicated in alloc.c and keyboard.c */ |
36 | /* Putting it in lisp.h makes cc bomb out! */ | |
37 | ||
38 | struct backtrace | |
4c576a83 GM |
39 | { |
40 | struct backtrace *next; | |
41 | Lisp_Object *function; | |
42 | Lisp_Object *args; /* Points to vector of args. */ | |
43 | int nargs; /* Length of vector. | |
daa37602 JB |
44 | If nargs is UNEVALLED, args points to slot holding |
45 | list of unevalled args */ | |
4c576a83 GM |
46 | char evalargs; |
47 | /* Nonzero means call value of debugger when done with this operation. */ | |
48 | char debug_on_exit; | |
49 | }; | |
db9f0278 JB |
50 | |
51 | struct backtrace *backtrace_list; | |
52 | ||
82da7701 JB |
53 | /* This structure helps implement the `catch' and `throw' control |
54 | structure. A struct catchtag contains all the information needed | |
55 | to restore the state of the interpreter after a non-local jump. | |
56 | ||
57 | Handlers for error conditions (represented by `struct handler' | |
58 | structures) just point to a catch tag to do the cleanup required | |
59 | for their jumps. | |
60 | ||
61 | catchtag structures are chained together in the C calling stack; | |
62 | the `next' member points to the next outer catchtag. | |
63 | ||
64 | A call like (throw TAG VAL) searches for a catchtag whose `tag' | |
65 | member is TAG, and then unbinds to it. The `val' member is used to | |
66 | hold VAL while the stack is unwound; `val' is returned as the value | |
67 | of the catch form. | |
68 | ||
69 | All the other members are concerned with restoring the interpreter | |
70 | state. */ | |
4c576a83 | 71 | |
db9f0278 | 72 | struct catchtag |
4c576a83 GM |
73 | { |
74 | Lisp_Object tag; | |
75 | Lisp_Object val; | |
76 | struct catchtag *next; | |
77 | struct gcpro *gcpro; | |
78 | jmp_buf jmp; | |
79 | struct backtrace *backlist; | |
80 | struct handler *handlerlist; | |
81 | int lisp_eval_depth; | |
82 | int pdlcount; | |
83 | int poll_suppress_count; | |
2659a09f | 84 | int interrupt_input_blocked; |
4c576a83 GM |
85 | struct byte_stack *byte_stack; |
86 | }; | |
db9f0278 JB |
87 | |
88 | struct catchtag *catchlist; | |
89 | ||
15934ffa RS |
90 | #ifdef DEBUG_GCPRO |
91 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
92 | int gcpro_level; | |
93 | #endif | |
94 | ||
6fd797f5 | 95 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
ad236261 | 96 | Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag; |
db9f0278 JB |
97 | Lisp_Object Qand_rest, Qand_optional; |
98 | Lisp_Object Qdebug_on_error; | |
d6edd563 | 99 | Lisp_Object Qdeclare; |
f01cbfdd | 100 | Lisp_Object Qdebug; |
db9f0278 | 101 | |
6e6e9f08 RS |
102 | /* This holds either the symbol `run-hooks' or nil. |
103 | It is nil at an early stage of startup, and when Emacs | |
104 | is shutting down. */ | |
4c576a83 | 105 | |
db9f0278 JB |
106 | Lisp_Object Vrun_hooks; |
107 | ||
108 | /* Non-nil means record all fset's and provide's, to be undone | |
109 | if the file being autoloaded is not fully loaded. | |
110 | They are recorded by being consed onto the front of Vautoload_queue: | |
47b82df9 | 111 | (FUN . ODEF) for a defun, (0 . OFEATURES) for a provide. */ |
db9f0278 JB |
112 | |
113 | Lisp_Object Vautoload_queue; | |
114 | ||
115 | /* Current number of specbindings allocated in specpdl. */ | |
4c576a83 | 116 | |
db9f0278 JB |
117 | int specpdl_size; |
118 | ||
119 | /* Pointer to beginning of specpdl. */ | |
4c576a83 | 120 | |
db9f0278 JB |
121 | struct specbinding *specpdl; |
122 | ||
123 | /* Pointer to first unused element in specpdl. */ | |
4c576a83 | 124 | |
ab837828 | 125 | struct specbinding *specpdl_ptr; |
db9f0278 JB |
126 | |
127 | /* Maximum size allowed for specpdl allocation */ | |
4c576a83 | 128 | |
31ade731 | 129 | EMACS_INT max_specpdl_size; |
db9f0278 JB |
130 | |
131 | /* Depth in Lisp evaluations and function calls. */ | |
4c576a83 | 132 | |
db9f0278 JB |
133 | int lisp_eval_depth; |
134 | ||
135 | /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
4c576a83 | 136 | |
31ade731 | 137 | EMACS_INT max_lisp_eval_depth; |
db9f0278 JB |
138 | |
139 | /* Nonzero means enter debugger before next function call */ | |
4c576a83 | 140 | |
db9f0278 JB |
141 | int debug_on_next_call; |
142 | ||
1b1acc13 | 143 | /* Non-zero means debugger may continue. This is zero when the |
556d7314 GM |
144 | debugger is called during redisplay, where it might not be safe to |
145 | continue the interrupted redisplay. */ | |
146 | ||
147 | int debugger_may_continue; | |
148 | ||
128c0f66 | 149 | /* List of conditions (non-nil atom means all) which cause a backtrace |
4de86b16 | 150 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 151 | |
128c0f66 | 152 | Lisp_Object Vstack_trace_on_error; |
db9f0278 | 153 | |
128c0f66 | 154 | /* List of conditions (non-nil atom means all) which enter the debugger |
4de86b16 | 155 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 156 | |
128c0f66 | 157 | Lisp_Object Vdebug_on_error; |
db9f0278 | 158 | |
fc950e09 | 159 | /* List of conditions and regexps specifying error messages which |
1b1acc13 | 160 | do not enter the debugger even if Vdebug_on_error says they should. */ |
4c576a83 | 161 | |
fc950e09 KH |
162 | Lisp_Object Vdebug_ignored_errors; |
163 | ||
61ede770 | 164 | /* Non-nil means call the debugger even if the error will be handled. */ |
4c576a83 | 165 | |
57a6e758 | 166 | Lisp_Object Vdebug_on_signal; |
61ede770 RS |
167 | |
168 | /* Hook for edebug to use. */ | |
4c576a83 | 169 | |
61ede770 RS |
170 | Lisp_Object Vsignal_hook_function; |
171 | ||
db9f0278 | 172 | /* Nonzero means enter debugger if a quit signal |
128c0f66 | 173 | is handled by the command loop's error handler. */ |
4c576a83 | 174 | |
db9f0278 JB |
175 | int debug_on_quit; |
176 | ||
be857679 | 177 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 178 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 179 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
180 | know that the debugger itself has an error, and we should just |
181 | signal the error instead of entering an infinite loop of debugger | |
182 | invocations. */ | |
4c576a83 | 183 | |
82da7701 | 184 | int when_entered_debugger; |
db9f0278 JB |
185 | |
186 | Lisp_Object Vdebugger; | |
187 | ||
a2ff3819 GM |
188 | /* The function from which the last `signal' was called. Set in |
189 | Fsignal. */ | |
190 | ||
191 | Lisp_Object Vsignaling_function; | |
192 | ||
4c576a83 GM |
193 | /* Set to non-zero while processing X events. Checked in Feval to |
194 | make sure the Lisp interpreter isn't called from a signal handler, | |
195 | which is unsafe because the interpreter isn't reentrant. */ | |
196 | ||
197 | int handling_signal; | |
198 | ||
d6edd563 GM |
199 | /* Function to process declarations in defmacro forms. */ |
200 | ||
201 | Lisp_Object Vmacro_declaration_function; | |
202 | ||
873759d5 | 203 | extern Lisp_Object Qrisky_local_variable; |
d6edd563 | 204 | |
2901f1d1 | 205 | static Lisp_Object funcall_lambda P_ ((Lisp_Object, int, Lisp_Object*)); |
2381d38d | 206 | static void unwind_to_catch P_ ((struct catchtag *, Lisp_Object)) NO_RETURN; |
eaa1e5ed EZ |
207 | |
208 | #if __GNUC__ | |
209 | /* "gcc -O3" enables automatic function inlining, which optimizes out | |
210 | the arguments for the invocations of these functions, whereas they | |
211 | expect these values on the stack. */ | |
212 | Lisp_Object apply1 () __attribute__((noinline)); | |
213 | Lisp_Object call2 () __attribute__((noinline)); | |
214 | #endif | |
873759d5 | 215 | \f |
dfcf069d | 216 | void |
db9f0278 JB |
217 | init_eval_once () |
218 | { | |
219 | specpdl_size = 50; | |
716acfce | 220 | specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding)); |
270e8074 | 221 | specpdl_ptr = specpdl; |
6588243d | 222 | /* Don't forget to update docs (lispref node "Local Variables"). */ |
a4547405 | 223 | max_specpdl_size = 1000; |
be436d23 | 224 | max_lisp_eval_depth = 400; |
34d470ba RS |
225 | |
226 | Vrun_hooks = Qnil; | |
db9f0278 JB |
227 | } |
228 | ||
dfcf069d | 229 | void |
db9f0278 JB |
230 | init_eval () |
231 | { | |
232 | specpdl_ptr = specpdl; | |
233 | catchlist = 0; | |
234 | handlerlist = 0; | |
235 | backtrace_list = 0; | |
236 | Vquit_flag = Qnil; | |
237 | debug_on_next_call = 0; | |
238 | lisp_eval_depth = 0; | |
87e21fbd | 239 | #ifdef DEBUG_GCPRO |
15934ffa | 240 | gcpro_level = 0; |
87e21fbd | 241 | #endif |
be857679 | 242 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 243 | when_entered_debugger = -1; |
db9f0278 JB |
244 | } |
245 | ||
9f5903bb RS |
246 | /* unwind-protect function used by call_debugger. */ |
247 | ||
248 | static Lisp_Object | |
249 | restore_stack_limits (data) | |
250 | Lisp_Object data; | |
251 | { | |
252 | max_specpdl_size = XINT (XCAR (data)); | |
253 | max_lisp_eval_depth = XINT (XCDR (data)); | |
538f78c3 | 254 | return Qnil; |
9f5903bb RS |
255 | } |
256 | ||
257 | /* Call the Lisp debugger, giving it argument ARG. */ | |
258 | ||
db9f0278 JB |
259 | Lisp_Object |
260 | call_debugger (arg) | |
261 | Lisp_Object arg; | |
262 | { | |
3648c842 | 263 | int debug_while_redisplaying; |
aed13378 | 264 | int count = SPECPDL_INDEX (); |
3648c842 | 265 | Lisp_Object val; |
9f5903bb | 266 | int old_max = max_specpdl_size; |
177c0ea7 | 267 | |
9f5903bb RS |
268 | /* Temporarily bump up the stack limits, |
269 | so the debugger won't run out of stack. */ | |
177c0ea7 | 270 | |
9f5903bb RS |
271 | max_specpdl_size += 1; |
272 | record_unwind_protect (restore_stack_limits, | |
273 | Fcons (make_number (old_max), | |
274 | make_number (max_lisp_eval_depth))); | |
275 | max_specpdl_size = old_max; | |
276 | ||
277 | if (lisp_eval_depth + 40 > max_lisp_eval_depth) | |
278 | max_lisp_eval_depth = lisp_eval_depth + 40; | |
279 | ||
280 | if (SPECPDL_INDEX () + 100 > max_specpdl_size) | |
281 | max_specpdl_size = SPECPDL_INDEX () + 100; | |
177c0ea7 | 282 | |
237c23b0 | 283 | #ifdef HAVE_X_WINDOWS |
df6c90d8 GM |
284 | if (display_hourglass_p) |
285 | cancel_hourglass (); | |
237c23b0 GM |
286 | #endif |
287 | ||
db9f0278 | 288 | debug_on_next_call = 0; |
be857679 | 289 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
290 | |
291 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
292 | displayed if the debugger is invoked during redisplay. */ | |
293 | debug_while_redisplaying = redisplaying_p; | |
294 | redisplaying_p = 0; | |
556d7314 GM |
295 | specbind (intern ("debugger-may-continue"), |
296 | debug_while_redisplaying ? Qnil : Qt); | |
8efb6cc7 | 297 | specbind (Qinhibit_redisplay, Qnil); |
9f5903bb | 298 | specbind (Qdebug_on_error, Qnil); |
9db6f6b4 GM |
299 | |
300 | #if 0 /* Binding this prevents execution of Lisp code during | |
301 | redisplay, which necessarily leads to display problems. */ | |
8efb6cc7 | 302 | specbind (Qinhibit_eval_during_redisplay, Qt); |
9db6f6b4 | 303 | #endif |
177c0ea7 | 304 | |
3648c842 GM |
305 | val = apply1 (Vdebugger, arg); |
306 | ||
307 | /* Interrupting redisplay and resuming it later is not safe under | |
308 | all circumstances. So, when the debugger returns, abort the | |
1b1acc13 | 309 | interrupted redisplay by going back to the top-level. */ |
3648c842 GM |
310 | if (debug_while_redisplaying) |
311 | Ftop_level (); | |
312 | ||
556d7314 | 313 | return unbind_to (count, val); |
db9f0278 JB |
314 | } |
315 | ||
dfcf069d | 316 | void |
db9f0278 JB |
317 | do_debug_on_call (code) |
318 | Lisp_Object code; | |
319 | { | |
320 | debug_on_next_call = 0; | |
321 | backtrace_list->debug_on_exit = 1; | |
322 | call_debugger (Fcons (code, Qnil)); | |
323 | } | |
324 | \f | |
325 | /* NOTE!!! Every function that can call EVAL must protect its args | |
326 | and temporaries from garbage collection while it needs them. | |
327 | The definition of `For' shows what you have to do. */ | |
328 | ||
329 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
330 | doc: /* Eval args until one of them yields non-nil, then return that value. |
331 | The remaining args are not evalled at all. | |
332 | If all args return nil, return nil. | |
533eb34b | 333 | usage: (or CONDITIONS...) */) |
9dbc9081 | 334 | (args) |
db9f0278 JB |
335 | Lisp_Object args; |
336 | { | |
e509f168 | 337 | register Lisp_Object val = Qnil; |
db9f0278 JB |
338 | struct gcpro gcpro1; |
339 | ||
e509f168 | 340 | GCPRO1 (args); |
db9f0278 | 341 | |
e509f168 | 342 | while (CONSP (args)) |
db9f0278 | 343 | { |
e509f168 | 344 | val = Feval (XCAR (args)); |
265a9e55 | 345 | if (!NILP (val)) |
db9f0278 | 346 | break; |
e509f168 | 347 | args = XCDR (args); |
db9f0278 | 348 | } |
db9f0278 JB |
349 | |
350 | UNGCPRO; | |
351 | return val; | |
352 | } | |
353 | ||
354 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
b8de5714 | 355 | doc: /* Eval args until one of them yields nil, then return nil. |
9dbc9081 PJ |
356 | The remaining args are not evalled at all. |
357 | If no arg yields nil, return the last arg's value. | |
533eb34b | 358 | usage: (and CONDITIONS...) */) |
9dbc9081 | 359 | (args) |
db9f0278 JB |
360 | Lisp_Object args; |
361 | { | |
e509f168 | 362 | register Lisp_Object val = Qt; |
db9f0278 JB |
363 | struct gcpro gcpro1; |
364 | ||
e509f168 | 365 | GCPRO1 (args); |
db9f0278 | 366 | |
e509f168 | 367 | while (CONSP (args)) |
db9f0278 | 368 | { |
e509f168 | 369 | val = Feval (XCAR (args)); |
265a9e55 | 370 | if (NILP (val)) |
db9f0278 | 371 | break; |
e509f168 | 372 | args = XCDR (args); |
db9f0278 | 373 | } |
db9f0278 JB |
374 | |
375 | UNGCPRO; | |
376 | return val; | |
377 | } | |
378 | ||
379 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
b8de5714 | 380 | doc: /* If COND yields non-nil, do THEN, else do ELSE... |
9dbc9081 PJ |
381 | Returns the value of THEN or the value of the last of the ELSE's. |
382 | THEN must be one expression, but ELSE... can be zero or more expressions. | |
383 | If COND yields nil, and there are no ELSE's, the value is nil. | |
7a25dc6d | 384 | usage: (if COND THEN ELSE...) */) |
9dbc9081 | 385 | (args) |
db9f0278 JB |
386 | Lisp_Object args; |
387 | { | |
388 | register Lisp_Object cond; | |
389 | struct gcpro gcpro1; | |
390 | ||
391 | GCPRO1 (args); | |
392 | cond = Feval (Fcar (args)); | |
393 | UNGCPRO; | |
394 | ||
265a9e55 | 395 | if (!NILP (cond)) |
db9f0278 JB |
396 | return Feval (Fcar (Fcdr (args))); |
397 | return Fprogn (Fcdr (Fcdr (args))); | |
398 | } | |
399 | ||
400 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
401 | doc: /* Try each clause until one succeeds. |
402 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated | |
403 | and, if the value is non-nil, this clause succeeds: | |
404 | then the expressions in BODY are evaluated and the last one's | |
405 | value is the value of the cond-form. | |
406 | If no clause succeeds, cond returns nil. | |
407 | If a clause has one element, as in (CONDITION), | |
408 | CONDITION's value if non-nil is returned from the cond-form. | |
7a25dc6d | 409 | usage: (cond CLAUSES...) */) |
9dbc9081 | 410 | (args) |
db9f0278 JB |
411 | Lisp_Object args; |
412 | { | |
413 | register Lisp_Object clause, val; | |
414 | struct gcpro gcpro1; | |
415 | ||
416 | val = Qnil; | |
417 | GCPRO1 (args); | |
265a9e55 | 418 | while (!NILP (args)) |
db9f0278 JB |
419 | { |
420 | clause = Fcar (args); | |
421 | val = Feval (Fcar (clause)); | |
265a9e55 | 422 | if (!NILP (val)) |
db9f0278 | 423 | { |
03699b14 KR |
424 | if (!EQ (XCDR (clause), Qnil)) |
425 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
426 | break; |
427 | } | |
03699b14 | 428 | args = XCDR (args); |
db9f0278 JB |
429 | } |
430 | UNGCPRO; | |
431 | ||
432 | return val; | |
433 | } | |
434 | ||
435 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
9dbc9081 | 436 | doc: /* Eval BODY forms sequentially and return value of last one. |
5b4a1f50 | 437 | usage: (progn BODY...) */) |
9dbc9081 | 438 | (args) |
db9f0278 JB |
439 | Lisp_Object args; |
440 | { | |
e509f168 | 441 | register Lisp_Object val = Qnil; |
db9f0278 JB |
442 | struct gcpro gcpro1; |
443 | ||
e509f168 | 444 | GCPRO1 (args); |
db9f0278 | 445 | |
e509f168 | 446 | while (CONSP (args)) |
db9f0278 | 447 | { |
e509f168 SM |
448 | val = Feval (XCAR (args)); |
449 | args = XCDR (args); | |
db9f0278 | 450 | } |
db9f0278 JB |
451 | |
452 | UNGCPRO; | |
453 | return val; | |
454 | } | |
455 | ||
456 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
457 | doc: /* Eval FIRST and BODY sequentially; value from FIRST. |
458 | The value of FIRST is saved during the evaluation of the remaining args, | |
459 | whose values are discarded. | |
7a25dc6d | 460 | usage: (prog1 FIRST BODY...) */) |
9dbc9081 | 461 | (args) |
db9f0278 JB |
462 | Lisp_Object args; |
463 | { | |
464 | Lisp_Object val; | |
465 | register Lisp_Object args_left; | |
466 | struct gcpro gcpro1, gcpro2; | |
467 | register int argnum = 0; | |
468 | ||
265a9e55 | 469 | if (NILP(args)) |
db9f0278 JB |
470 | return Qnil; |
471 | ||
472 | args_left = args; | |
473 | val = Qnil; | |
474 | GCPRO2 (args, val); | |
475 | ||
476 | do | |
477 | { | |
478 | if (!(argnum++)) | |
479 | val = Feval (Fcar (args_left)); | |
480 | else | |
481 | Feval (Fcar (args_left)); | |
482 | args_left = Fcdr (args_left); | |
483 | } | |
265a9e55 | 484 | while (!NILP(args_left)); |
db9f0278 JB |
485 | |
486 | UNGCPRO; | |
487 | return val; | |
488 | } | |
489 | ||
490 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
82fc29a1 JB |
491 | doc: /* Eval FORM1, FORM2 and BODY sequentially; value from FORM2. |
492 | The value of FORM2 is saved during the evaluation of the | |
493 | remaining args, whose values are discarded. | |
494 | usage: (prog2 FORM1 FORM2 BODY...) */) | |
9dbc9081 | 495 | (args) |
db9f0278 JB |
496 | Lisp_Object args; |
497 | { | |
498 | Lisp_Object val; | |
499 | register Lisp_Object args_left; | |
500 | struct gcpro gcpro1, gcpro2; | |
501 | register int argnum = -1; | |
502 | ||
503 | val = Qnil; | |
504 | ||
87d238ba | 505 | if (NILP (args)) |
db9f0278 JB |
506 | return Qnil; |
507 | ||
508 | args_left = args; | |
509 | val = Qnil; | |
510 | GCPRO2 (args, val); | |
511 | ||
512 | do | |
513 | { | |
514 | if (!(argnum++)) | |
515 | val = Feval (Fcar (args_left)); | |
516 | else | |
517 | Feval (Fcar (args_left)); | |
518 | args_left = Fcdr (args_left); | |
519 | } | |
87d238ba | 520 | while (!NILP (args_left)); |
db9f0278 JB |
521 | |
522 | UNGCPRO; | |
523 | return val; | |
524 | } | |
525 | ||
526 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
527 | doc: /* Set each SYM to the value of its VAL. |
528 | The symbols SYM are variables; they are literal (not evaluated). | |
529 | The values VAL are expressions; they are evaluated. | |
530 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
531 | The second VAL is not computed until after the first SYM is set, and so on; | |
532 | each VAL can use the new value of variables set earlier in the `setq'. | |
533 | The return value of the `setq' form is the value of the last VAL. | |
819586b2 | 534 | usage: (setq [SYM VAL]...) */) |
9dbc9081 | 535 | (args) |
db9f0278 JB |
536 | Lisp_Object args; |
537 | { | |
538 | register Lisp_Object args_left; | |
539 | register Lisp_Object val, sym; | |
540 | struct gcpro gcpro1; | |
541 | ||
265a9e55 | 542 | if (NILP(args)) |
db9f0278 JB |
543 | return Qnil; |
544 | ||
545 | args_left = args; | |
546 | GCPRO1 (args); | |
547 | ||
548 | do | |
549 | { | |
550 | val = Feval (Fcar (Fcdr (args_left))); | |
551 | sym = Fcar (args_left); | |
552 | Fset (sym, val); | |
553 | args_left = Fcdr (Fcdr (args_left)); | |
554 | } | |
265a9e55 | 555 | while (!NILP(args_left)); |
db9f0278 JB |
556 | |
557 | UNGCPRO; | |
558 | return val; | |
559 | } | |
177c0ea7 | 560 | |
db9f0278 | 561 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, |
9dbc9081 PJ |
562 | doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'. |
563 | usage: (quote ARG) */) | |
564 | (args) | |
db9f0278 JB |
565 | Lisp_Object args; |
566 | { | |
567 | return Fcar (args); | |
568 | } | |
177c0ea7 | 569 | |
db9f0278 | 570 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, |
9dbc9081 PJ |
571 | doc: /* Like `quote', but preferred for objects which are functions. |
572 | In byte compilation, `function' causes its argument to be compiled. | |
573 | `quote' cannot do that. | |
574 | usage: (function ARG) */) | |
575 | (args) | |
db9f0278 JB |
576 | Lisp_Object args; |
577 | { | |
578 | return Fcar (args); | |
579 | } | |
580 | ||
e0f331ab | 581 | |
db9f0278 | 582 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, |
c63df42b | 583 | doc: /* Return t if the function was run directly by user input. |
82fc29a1 JB |
584 | This means that the function was called with `call-interactively' |
585 | \(which includes being called as the binding of a key) | |
c63df42b RS |
586 | and input is currently coming from the keyboard (not in keyboard macro), |
587 | and Emacs is not running in batch mode (`noninteractive' is nil). | |
588 | ||
589 | The only known proper use of `interactive-p' is in deciding whether to | |
590 | display a helpful message, or how to display it. If you're thinking | |
591 | of using it for any other purpose, it is quite likely that you're | |
592 | making a mistake. Think: what do you want to do when the command is | |
593 | called from a keyboard macro? | |
594 | ||
595 | If you want to test whether your function was called with | |
596 | `call-interactively', the way to do that is by adding an extra | |
597 | optional argument, and making the `interactive' spec specify non-nil | |
598 | unconditionally for that argument. (`p' is a good way to do this.) */) | |
9dbc9081 | 599 | () |
db9f0278 | 600 | { |
c63df42b | 601 | return (INTERACTIVE && interactive_p (1)) ? Qt : Qnil; |
e0f331ab GM |
602 | } |
603 | ||
604 | ||
4b664e76 | 605 | DEFUN ("called-interactively-p", Fcalled_interactively_p, Scalled_interactively_p, 0, 0, 0, |
82fc29a1 | 606 | doc: /* Return t if the function using this was called with `call-interactively'. |
c63df42b RS |
607 | This is used for implementing advice and other function-modifying |
608 | features of Emacs. | |
609 | ||
610 | The cleanest way to test whether your function was called with | |
82fc29a1 JB |
611 | `call-interactively' is by adding an extra optional argument, |
612 | and making the `interactive' spec specify non-nil unconditionally | |
613 | for that argument. (`p' is a good way to do this.) */) | |
c63df42b RS |
614 | () |
615 | { | |
0b31741c | 616 | return interactive_p (1) ? Qt : Qnil; |
c63df42b RS |
617 | } |
618 | ||
619 | ||
620 | /* Return 1 if function in which this appears was called using | |
621 | call-interactively. | |
e0f331ab GM |
622 | |
623 | EXCLUDE_SUBRS_P non-zero means always return 0 if the function | |
624 | called is a built-in. */ | |
625 | ||
626 | int | |
627 | interactive_p (exclude_subrs_p) | |
628 | int exclude_subrs_p; | |
629 | { | |
630 | struct backtrace *btp; | |
631 | Lisp_Object fun; | |
db9f0278 | 632 | |
db9f0278 | 633 | btp = backtrace_list; |
daa37602 JB |
634 | |
635 | /* If this isn't a byte-compiled function, there may be a frame at | |
e0f331ab | 636 | the top for Finteractive_p. If so, skip it. */ |
a7f96a35 | 637 | fun = Findirect_function (*btp->function, Qnil); |
0b31741c RS |
638 | if (SUBRP (fun) && (XSUBR (fun) == &Sinteractive_p |
639 | || XSUBR (fun) == &Scalled_interactively_p)) | |
db9f0278 | 640 | btp = btp->next; |
daa37602 JB |
641 | |
642 | /* If we're running an Emacs 18-style byte-compiled function, there | |
4402a9ed RS |
643 | may be a frame for Fbytecode at the top level. In any version of |
644 | Emacs there can be Fbytecode frames for subexpressions evaluated | |
645 | inside catch and condition-case. Skip past them. | |
daa37602 | 646 | |
4402a9ed | 647 | If this isn't a byte-compiled function, then we may now be |
daa37602 | 648 | looking at several frames for special forms. Skip past them. */ |
4402a9ed RS |
649 | while (btp |
650 | && (EQ (*btp->function, Qbytecode) | |
651 | || btp->nargs == UNEVALLED)) | |
a6e3fa71 JB |
652 | btp = btp->next; |
653 | ||
daa37602 JB |
654 | /* btp now points at the frame of the innermost function that isn't |
655 | a special form, ignoring frames for Finteractive_p and/or | |
656 | Fbytecode at the top. If this frame is for a built-in function | |
657 | (such as load or eval-region) return nil. */ | |
a7f96a35 | 658 | fun = Findirect_function (*btp->function, Qnil); |
e0f331ab GM |
659 | if (exclude_subrs_p && SUBRP (fun)) |
660 | return 0; | |
177c0ea7 | 661 | |
db9f0278 JB |
662 | /* btp points to the frame of a Lisp function that called interactive-p. |
663 | Return t if that function was called interactively. */ | |
664 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
e0f331ab GM |
665 | return 1; |
666 | return 0; | |
db9f0278 JB |
667 | } |
668 | ||
e0f331ab | 669 | |
db9f0278 | 670 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, |
9dbc9081 PJ |
671 | doc: /* Define NAME as a function. |
672 | The definition is (lambda ARGLIST [DOCSTRING] BODY...). | |
673 | See also the function `interactive'. | |
7a25dc6d | 674 | usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */) |
9dbc9081 | 675 | (args) |
db9f0278 JB |
676 | Lisp_Object args; |
677 | { | |
678 | register Lisp_Object fn_name; | |
679 | register Lisp_Object defn; | |
680 | ||
681 | fn_name = Fcar (args); | |
6992a868 | 682 | CHECK_SYMBOL (fn_name); |
db9f0278 | 683 | defn = Fcons (Qlambda, Fcdr (args)); |
265a9e55 | 684 | if (!NILP (Vpurify_flag)) |
db9f0278 | 685 | defn = Fpurecopy (defn); |
f58e9f8c RS |
686 | if (CONSP (XSYMBOL (fn_name)->function) |
687 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
688 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 689 | Ffset (fn_name, defn); |
6fd797f5 | 690 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
691 | return fn_name; |
692 | } | |
693 | ||
694 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
9dbc9081 | 695 | doc: /* Define NAME as a macro. |
0654d6e3 RS |
696 | The actual definition looks like |
697 | (macro lambda ARGLIST [DOCSTRING] [DECL] BODY...). | |
9dbc9081 PJ |
698 | When the macro is called, as in (NAME ARGS...), |
699 | the function (lambda ARGLIST BODY...) is applied to | |
700 | the list ARGS... as it appears in the expression, | |
701 | and the result should be a form to be evaluated instead of the original. | |
0654d6e3 RS |
702 | |
703 | DECL is a declaration, optional, which can specify how to indent | |
704 | calls to this macro and how Edebug should handle it. It looks like this: | |
705 | (declare SPECS...) | |
706 | The elements can look like this: | |
707 | (indent INDENT) | |
708 | Set NAME's `lisp-indent-function' property to INDENT. | |
709 | ||
e509f168 | 710 | (debug DEBUG) |
0654d6e3 | 711 | Set NAME's `edebug-form-spec' property to DEBUG. (This is |
7d5c86e5 | 712 | equivalent to writing a `def-edebug-spec' for the macro.) |
0654d6e3 | 713 | usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */) |
9dbc9081 | 714 | (args) |
db9f0278 JB |
715 | Lisp_Object args; |
716 | { | |
717 | register Lisp_Object fn_name; | |
718 | register Lisp_Object defn; | |
d6edd563 | 719 | Lisp_Object lambda_list, doc, tail; |
db9f0278 JB |
720 | |
721 | fn_name = Fcar (args); | |
8e975df9 | 722 | CHECK_SYMBOL (fn_name); |
d6edd563 GM |
723 | lambda_list = Fcar (Fcdr (args)); |
724 | tail = Fcdr (Fcdr (args)); | |
725 | ||
726 | doc = Qnil; | |
727 | if (STRINGP (Fcar (tail))) | |
728 | { | |
e509f168 SM |
729 | doc = XCAR (tail); |
730 | tail = XCDR (tail); | |
d6edd563 GM |
731 | } |
732 | ||
733 | while (CONSP (Fcar (tail)) | |
734 | && EQ (Fcar (Fcar (tail)), Qdeclare)) | |
735 | { | |
736 | if (!NILP (Vmacro_declaration_function)) | |
737 | { | |
738 | struct gcpro gcpro1; | |
739 | GCPRO1 (args); | |
740 | call2 (Vmacro_declaration_function, fn_name, Fcar (tail)); | |
741 | UNGCPRO; | |
742 | } | |
177c0ea7 | 743 | |
d6edd563 GM |
744 | tail = Fcdr (tail); |
745 | } | |
746 | ||
747 | if (NILP (doc)) | |
748 | tail = Fcons (lambda_list, tail); | |
749 | else | |
750 | tail = Fcons (lambda_list, Fcons (doc, tail)); | |
751 | defn = Fcons (Qmacro, Fcons (Qlambda, tail)); | |
177c0ea7 | 752 | |
265a9e55 | 753 | if (!NILP (Vpurify_flag)) |
db9f0278 | 754 | defn = Fpurecopy (defn); |
f58e9f8c RS |
755 | if (CONSP (XSYMBOL (fn_name)->function) |
756 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
757 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 758 | Ffset (fn_name, defn); |
6fd797f5 | 759 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
760 | return fn_name; |
761 | } | |
762 | ||
19cebf5a | 763 | |
1848d15d | 764 | DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0, |
4a9308b8 | 765 | doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE. |
e102f0d8 | 766 | Aliased variables always have the same value; setting one sets the other. |
4a9308b8 JB |
767 | Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is |
768 | omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE, | |
769 | or of the variable at the end of the chain of aliases, if BASE-VARIABLE is | |
770 | itself an alias. | |
771 | The return value is BASE-VARIABLE. */) | |
772 | (new_alias, base_variable, docstring) | |
773 | Lisp_Object new_alias, base_variable, docstring; | |
19cebf5a GM |
774 | { |
775 | struct Lisp_Symbol *sym; | |
1848d15d | 776 | |
4a9308b8 JB |
777 | CHECK_SYMBOL (new_alias); |
778 | CHECK_SYMBOL (base_variable); | |
19cebf5a | 779 | |
4a9308b8 | 780 | if (SYMBOL_CONSTANT_P (new_alias)) |
19cebf5a GM |
781 | error ("Cannot make a constant an alias"); |
782 | ||
4a9308b8 | 783 | sym = XSYMBOL (new_alias); |
19cebf5a | 784 | sym->indirect_variable = 1; |
4a9308b8 JB |
785 | sym->value = base_variable; |
786 | sym->constant = SYMBOL_CONSTANT_P (base_variable); | |
787 | LOADHIST_ATTACH (new_alias); | |
1848d15d | 788 | if (!NILP (docstring)) |
4a9308b8 | 789 | Fput (new_alias, Qvariable_documentation, docstring); |
bd81fcf8 | 790 | else |
4a9308b8 | 791 | Fput (new_alias, Qvariable_documentation, Qnil); |
1848d15d | 792 | |
4a9308b8 | 793 | return base_variable; |
19cebf5a GM |
794 | } |
795 | ||
796 | ||
db9f0278 | 797 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, |
29357847 | 798 | doc: /* Define SYMBOL as a variable, and return SYMBOL. |
9dbc9081 PJ |
799 | You are not required to define a variable in order to use it, |
800 | but the definition can supply documentation and an initial value | |
801 | in a way that tags can recognize. | |
802 | ||
803 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void. | |
804 | If SYMBOL is buffer-local, its default value is what is set; | |
805 | buffer-local values are not affected. | |
806 | INITVALUE and DOCSTRING are optional. | |
807 | If DOCSTRING starts with *, this variable is identified as a user option. | |
808 | This means that M-x set-variable recognizes it. | |
809 | See also `user-variable-p'. | |
810 | If INITVALUE is missing, SYMBOL's value is not set. | |
733f68b6 LT |
811 | |
812 | If SYMBOL has a local binding, then this form affects the local | |
813 | binding. This is usually not what you want. Thus, if you need to | |
814 | load a file defining variables, with this form or with `defconst' or | |
815 | `defcustom', you should always load that file _outside_ any bindings | |
816 | for these variables. \(`defconst' and `defcustom' behave similarly in | |
817 | this respect.) | |
2df5238c | 818 | usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */) |
9dbc9081 | 819 | (args) |
db9f0278 JB |
820 | Lisp_Object args; |
821 | { | |
a42ba017 | 822 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
823 | |
824 | sym = Fcar (args); | |
a42ba017 RS |
825 | tail = Fcdr (args); |
826 | if (!NILP (Fcdr (Fcdr (tail)))) | |
921baa95 | 827 | error ("Too many arguments"); |
a42ba017 | 828 | |
33568849 | 829 | tem = Fdefault_boundp (sym); |
a42ba017 | 830 | if (!NILP (tail)) |
db9f0278 | 831 | { |
1c9916a1 SM |
832 | if (SYMBOL_CONSTANT_P (sym)) |
833 | { | |
834 | /* For upward compatibility, allow (defvar :foo (quote :foo)). */ | |
835 | Lisp_Object tem = Fcar (tail); | |
836 | if (! (CONSP (tem) | |
837 | && EQ (XCAR (tem), Qquote) | |
838 | && CONSP (XCDR (tem)) | |
839 | && EQ (XCAR (XCDR (tem)), sym))) | |
840 | error ("Constant symbol `%s' specified in defvar", | |
841 | SDATA (SYMBOL_NAME (sym))); | |
842 | } | |
843 | ||
265a9e55 | 844 | if (NILP (tem)) |
33568849 | 845 | Fset_default (sym, Feval (Fcar (tail))); |
d0bce91e SM |
846 | else |
847 | { /* Check if there is really a global binding rather than just a let | |
848 | binding that shadows the global unboundness of the var. */ | |
b28d0d9a | 849 | volatile struct specbinding *pdl = specpdl_ptr; |
d0bce91e SM |
850 | while (--pdl >= specpdl) |
851 | { | |
852 | if (EQ (pdl->symbol, sym) && !pdl->func | |
853 | && EQ (pdl->old_value, Qunbound)) | |
854 | { | |
855 | message_with_string ("Warning: defvar ignored because %s is let-bound", | |
856 | SYMBOL_NAME (sym), 1); | |
857 | break; | |
858 | } | |
859 | } | |
860 | } | |
33568849 | 861 | tail = Fcdr (tail); |
e509f168 SM |
862 | tem = Fcar (tail); |
863 | if (!NILP (tem)) | |
33568849 | 864 | { |
33568849 SM |
865 | if (!NILP (Vpurify_flag)) |
866 | tem = Fpurecopy (tem); | |
867 | Fput (sym, Qvariable_documentation, tem); | |
868 | } | |
6fd797f5 | 869 | LOADHIST_ATTACH (sym); |
db9f0278 | 870 | } |
33568849 | 871 | else |
d7c1d0fc RS |
872 | /* Simple (defvar <var>) should not count as a definition at all. |
873 | It could get in the way of other definitions, and unloading this | |
874 | package could try to make the variable unbound. */ | |
addf35fd AS |
875 | ; |
876 | ||
db9f0278 JB |
877 | return sym; |
878 | } | |
879 | ||
880 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
881 | doc: /* Define SYMBOL as a constant variable. |
882 | The intent is that neither programs nor users should ever change this value. | |
883 | Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
884 | If SYMBOL is buffer-local, its default value is what is set; | |
885 | buffer-local values are not affected. | |
886 | DOCSTRING is optional. | |
733f68b6 LT |
887 | |
888 | If SYMBOL has a local binding, then this form sets the local binding's | |
889 | value. However, you should normally not make local bindings for | |
890 | variables defined with this form. | |
7a25dc6d | 891 | usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */) |
9dbc9081 | 892 | (args) |
db9f0278 JB |
893 | Lisp_Object args; |
894 | { | |
895 | register Lisp_Object sym, tem; | |
896 | ||
897 | sym = Fcar (args); | |
a42ba017 | 898 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
921baa95 | 899 | error ("Too many arguments"); |
a42ba017 | 900 | |
1182a7cb DL |
901 | tem = Feval (Fcar (Fcdr (args))); |
902 | if (!NILP (Vpurify_flag)) | |
903 | tem = Fpurecopy (tem); | |
904 | Fset_default (sym, tem); | |
db9f0278 | 905 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 906 | if (!NILP (tem)) |
db9f0278 | 907 | { |
265a9e55 | 908 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
909 | tem = Fpurecopy (tem); |
910 | Fput (sym, Qvariable_documentation, tem); | |
911 | } | |
873759d5 | 912 | Fput (sym, Qrisky_local_variable, Qt); |
6fd797f5 | 913 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
914 | return sym; |
915 | } | |
916 | ||
606cdb89 JB |
917 | /* Error handler used in Fuser_variable_p. */ |
918 | static Lisp_Object | |
919 | user_variable_p_eh (ignore) | |
920 | Lisp_Object ignore; | |
921 | { | |
922 | return Qnil; | |
923 | } | |
924 | ||
db9f0278 | 925 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, |
606cdb89 | 926 | doc: /* Return t if VARIABLE is intended to be set and modified by users. |
9dbc9081 | 927 | \(The alternative is a variable used internally in a Lisp program.) |
606cdb89 JB |
928 | A variable is a user variable if |
929 | \(1) the first character of its documentation is `*', or | |
930 | \(2) it is customizable (its property list contains a non-nil value | |
931 | of `standard-value' or `custom-autoload'), or | |
932 | \(3) it is an alias for another user variable. | |
933 | Return nil if VARIABLE is an alias and there is a loop in the | |
934 | chain of symbols. */) | |
9dbc9081 | 935 | (variable) |
db9f0278 JB |
936 | Lisp_Object variable; |
937 | { | |
938 | Lisp_Object documentation; | |
177c0ea7 | 939 | |
5e78e475 RS |
940 | if (!SYMBOLP (variable)) |
941 | return Qnil; | |
942 | ||
606cdb89 JB |
943 | /* If indirect and there's an alias loop, don't check anything else. */ |
944 | if (XSYMBOL (variable)->indirect_variable | |
945 | && NILP (internal_condition_case_1 (indirect_variable, variable, | |
946 | Qt, user_variable_p_eh))) | |
947 | return Qnil; | |
948 | ||
949 | while (1) | |
950 | { | |
951 | documentation = Fget (variable, Qvariable_documentation); | |
952 | if (INTEGERP (documentation) && XINT (documentation) < 0) | |
953 | return Qt; | |
954 | if (STRINGP (documentation) | |
955 | && ((unsigned char) SREF (documentation, 0) == '*')) | |
956 | return Qt; | |
957 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
958 | if (CONSP (documentation) | |
959 | && STRINGP (XCAR (documentation)) | |
960 | && INTEGERP (XCDR (documentation)) | |
961 | && XINT (XCDR (documentation)) < 0) | |
962 | return Qt; | |
963 | /* Customizable? See `custom-variable-p'. */ | |
964 | if ((!NILP (Fget (variable, intern ("standard-value")))) | |
965 | || (!NILP (Fget (variable, intern ("custom-autoload"))))) | |
966 | return Qt; | |
967 | ||
968 | if (!XSYMBOL (variable)->indirect_variable) | |
969 | return Qnil; | |
970 | ||
971 | /* An indirect variable? Let's follow the chain. */ | |
972 | variable = XSYMBOL (variable)->value; | |
973 | } | |
177c0ea7 | 974 | } |
db9f0278 JB |
975 | \f |
976 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
977 | doc: /* Bind variables according to VARLIST then eval BODY. |
978 | The value of the last form in BODY is returned. | |
979 | Each element of VARLIST is a symbol (which is bound to nil) | |
980 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
981 | Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
7a25dc6d | 982 | usage: (let* VARLIST BODY...) */) |
9dbc9081 | 983 | (args) |
db9f0278 JB |
984 | Lisp_Object args; |
985 | { | |
986 | Lisp_Object varlist, val, elt; | |
aed13378 | 987 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
988 | struct gcpro gcpro1, gcpro2, gcpro3; |
989 | ||
990 | GCPRO3 (args, elt, varlist); | |
991 | ||
992 | varlist = Fcar (args); | |
265a9e55 | 993 | while (!NILP (varlist)) |
db9f0278 JB |
994 | { |
995 | QUIT; | |
996 | elt = Fcar (varlist); | |
90165123 | 997 | if (SYMBOLP (elt)) |
db9f0278 | 998 | specbind (elt, Qnil); |
08564963 | 999 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1000 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1001 | else |
1002 | { | |
1003 | val = Feval (Fcar (Fcdr (elt))); | |
1004 | specbind (Fcar (elt), val); | |
1005 | } | |
1006 | varlist = Fcdr (varlist); | |
1007 | } | |
1008 | UNGCPRO; | |
1009 | val = Fprogn (Fcdr (args)); | |
1010 | return unbind_to (count, val); | |
1011 | } | |
1012 | ||
1013 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1014 | doc: /* Bind variables according to VARLIST then eval BODY. |
1015 | The value of the last form in BODY is returned. | |
1016 | Each element of VARLIST is a symbol (which is bound to nil) | |
1017 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
1018 | All the VALUEFORMs are evalled before any symbols are bound. | |
7a25dc6d | 1019 | usage: (let VARLIST BODY...) */) |
9dbc9081 | 1020 | (args) |
db9f0278 JB |
1021 | Lisp_Object args; |
1022 | { | |
1023 | Lisp_Object *temps, tem; | |
1024 | register Lisp_Object elt, varlist; | |
aed13378 | 1025 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
1026 | register int argnum; |
1027 | struct gcpro gcpro1, gcpro2; | |
1028 | ||
1029 | varlist = Fcar (args); | |
1030 | ||
1031 | /* Make space to hold the values to give the bound variables */ | |
1032 | elt = Flength (varlist); | |
1033 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
1034 | ||
1035 | /* Compute the values and store them in `temps' */ | |
1036 | ||
1037 | GCPRO2 (args, *temps); | |
1038 | gcpro2.nvars = 0; | |
1039 | ||
265a9e55 | 1040 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
1041 | { |
1042 | QUIT; | |
1043 | elt = Fcar (varlist); | |
90165123 | 1044 | if (SYMBOLP (elt)) |
db9f0278 | 1045 | temps [argnum++] = Qnil; |
08564963 | 1046 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1047 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1048 | else |
1049 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
1050 | gcpro2.nvars = argnum; | |
1051 | } | |
1052 | UNGCPRO; | |
1053 | ||
1054 | varlist = Fcar (args); | |
265a9e55 | 1055 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
1056 | { |
1057 | elt = Fcar (varlist); | |
1058 | tem = temps[argnum++]; | |
90165123 | 1059 | if (SYMBOLP (elt)) |
db9f0278 JB |
1060 | specbind (elt, tem); |
1061 | else | |
1062 | specbind (Fcar (elt), tem); | |
1063 | } | |
1064 | ||
1065 | elt = Fprogn (Fcdr (args)); | |
1066 | return unbind_to (count, elt); | |
1067 | } | |
1068 | ||
1069 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1070 | doc: /* If TEST yields non-nil, eval BODY... and repeat. |
1071 | The order of execution is thus TEST, BODY, TEST, BODY and so on | |
1072 | until TEST returns nil. | |
7a25dc6d | 1073 | usage: (while TEST BODY...) */) |
9dbc9081 | 1074 | (args) |
db9f0278 JB |
1075 | Lisp_Object args; |
1076 | { | |
2b9bde76 | 1077 | Lisp_Object test, body; |
db9f0278 JB |
1078 | struct gcpro gcpro1, gcpro2; |
1079 | ||
1080 | GCPRO2 (test, body); | |
1081 | ||
1082 | test = Fcar (args); | |
1083 | body = Fcdr (args); | |
2b9bde76 | 1084 | while (!NILP (Feval (test))) |
db9f0278 JB |
1085 | { |
1086 | QUIT; | |
1087 | Fprogn (body); | |
1088 | } | |
1089 | ||
1090 | UNGCPRO; | |
1091 | return Qnil; | |
1092 | } | |
1093 | ||
1094 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
9dbc9081 PJ |
1095 | doc: /* Return result of expanding macros at top level of FORM. |
1096 | If FORM is not a macro call, it is returned unchanged. | |
1097 | Otherwise, the macro is expanded and the expansion is considered | |
1098 | in place of FORM. When a non-macro-call results, it is returned. | |
1099 | ||
1100 | The second optional arg ENVIRONMENT specifies an environment of macro | |
1101 | definitions to shadow the loaded ones for use in file byte-compilation. */) | |
1102 | (form, environment) | |
2e267a2e | 1103 | Lisp_Object form; |
79e8bfbf | 1104 | Lisp_Object environment; |
db9f0278 | 1105 | { |
23d6b5a6 | 1106 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
1107 | register Lisp_Object expander, sym, def, tem; |
1108 | ||
1109 | while (1) | |
1110 | { | |
1111 | /* Come back here each time we expand a macro call, | |
1112 | in case it expands into another macro call. */ | |
90165123 | 1113 | if (!CONSP (form)) |
db9f0278 | 1114 | break; |
23d6b5a6 | 1115 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 1116 | def = sym = XCAR (form); |
23d6b5a6 | 1117 | tem = Qnil; |
db9f0278 JB |
1118 | /* Trace symbols aliases to other symbols |
1119 | until we get a symbol that is not an alias. */ | |
90165123 | 1120 | while (SYMBOLP (def)) |
db9f0278 JB |
1121 | { |
1122 | QUIT; | |
23d6b5a6 | 1123 | sym = def; |
79e8bfbf | 1124 | tem = Fassq (sym, environment); |
265a9e55 | 1125 | if (NILP (tem)) |
db9f0278 JB |
1126 | { |
1127 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
1128 | if (!EQ (def, Qunbound)) |
1129 | continue; | |
db9f0278 | 1130 | } |
23d6b5a6 | 1131 | break; |
db9f0278 | 1132 | } |
79e8bfbf | 1133 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 1134 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 1135 | if (NILP (tem)) |
db9f0278 | 1136 | { |
79e8bfbf | 1137 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 1138 | Look at its function definition. */ |
90165123 | 1139 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
1140 | /* Not defined or definition not suitable */ |
1141 | break; | |
03699b14 | 1142 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
1143 | { |
1144 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 1145 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 1146 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
1147 | /* Yes, load it and try again. */ |
1148 | { | |
ca20916b RS |
1149 | struct gcpro gcpro1; |
1150 | GCPRO1 (form); | |
ee9ee63c | 1151 | do_autoload (def, sym); |
ca20916b | 1152 | UNGCPRO; |
ee9ee63c JB |
1153 | continue; |
1154 | } | |
1155 | else | |
db9f0278 | 1156 | break; |
db9f0278 | 1157 | } |
03699b14 | 1158 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 1159 | break; |
03699b14 | 1160 | else expander = XCDR (def); |
db9f0278 JB |
1161 | } |
1162 | else | |
1163 | { | |
03699b14 | 1164 | expander = XCDR (tem); |
265a9e55 | 1165 | if (NILP (expander)) |
db9f0278 JB |
1166 | break; |
1167 | } | |
03699b14 | 1168 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
1169 | } |
1170 | return form; | |
1171 | } | |
1172 | \f | |
1173 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1174 | doc: /* Eval BODY allowing nonlocal exits using `throw'. |
1175 | TAG is evalled to get the tag to use; it must not be nil. | |
1176 | ||
1177 | Then the BODY is executed. | |
1d632ccf | 1178 | Within BODY, a call to `throw' with the same TAG exits BODY and this `catch'. |
9dbc9081 PJ |
1179 | If no throw happens, `catch' returns the value of the last BODY form. |
1180 | If a throw happens, it specifies the value to return from `catch'. | |
7a25dc6d | 1181 | usage: (catch TAG BODY...) */) |
9dbc9081 | 1182 | (args) |
db9f0278 JB |
1183 | Lisp_Object args; |
1184 | { | |
1185 | register Lisp_Object tag; | |
1186 | struct gcpro gcpro1; | |
1187 | ||
1188 | GCPRO1 (args); | |
1189 | tag = Feval (Fcar (args)); | |
1190 | UNGCPRO; | |
1191 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
1192 | } | |
1193 | ||
1194 | /* Set up a catch, then call C function FUNC on argument ARG. | |
1195 | FUNC should return a Lisp_Object. | |
1196 | This is how catches are done from within C code. */ | |
1197 | ||
1198 | Lisp_Object | |
1199 | internal_catch (tag, func, arg) | |
1200 | Lisp_Object tag; | |
1201 | Lisp_Object (*func) (); | |
1202 | Lisp_Object arg; | |
1203 | { | |
1204 | /* This structure is made part of the chain `catchlist'. */ | |
1205 | struct catchtag c; | |
1206 | ||
1207 | /* Fill in the components of c, and put it on the list. */ | |
1208 | c.next = catchlist; | |
1209 | c.tag = tag; | |
1210 | c.val = Qnil; | |
1211 | c.backlist = backtrace_list; | |
1212 | c.handlerlist = handlerlist; | |
1213 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1214 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1215 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1216 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1217 | c.gcpro = gcprolist; |
bcf28080 | 1218 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1219 | catchlist = &c; |
1220 | ||
1221 | /* Call FUNC. */ | |
1222 | if (! _setjmp (c.jmp)) | |
1223 | c.val = (*func) (arg); | |
1224 | ||
1225 | /* Throw works by a longjmp that comes right here. */ | |
1226 | catchlist = c.next; | |
1227 | return c.val; | |
1228 | } | |
1229 | ||
ba410f40 JB |
1230 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1231 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1232 | |
ba410f40 JB |
1233 | This is the guts Fthrow and Fsignal; they differ only in the way |
1234 | they choose the catch tag to throw to. A catch tag for a | |
1235 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1236 | |
ba410f40 JB |
1237 | Before each catch is discarded, unbind all special bindings and |
1238 | execute all unwind-protect clauses made above that catch. Unwind | |
1239 | the handler stack as we go, so that the proper handlers are in | |
1240 | effect for each unwind-protect clause we run. At the end, restore | |
1241 | some static info saved in CATCH, and longjmp to the location | |
1242 | specified in the | |
1243 | ||
1244 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
1245 | |
1246 | static void | |
ba410f40 | 1247 | unwind_to_catch (catch, value) |
db9f0278 | 1248 | struct catchtag *catch; |
ba410f40 | 1249 | Lisp_Object value; |
db9f0278 JB |
1250 | { |
1251 | register int last_time; | |
1252 | ||
ba410f40 JB |
1253 | /* Save the value in the tag. */ |
1254 | catch->val = value; | |
1255 | ||
0b31741c | 1256 | /* Restore certain special C variables. */ |
1cdc3155 | 1257 | set_poll_suppress_count (catch->poll_suppress_count); |
c1788fbc | 1258 | UNBLOCK_INPUT_TO (catch->interrupt_input_blocked); |
0b31741c | 1259 | handling_signal = 0; |
69bbd6bd | 1260 | immediate_quit = 0; |
82da7701 | 1261 | |
db9f0278 JB |
1262 | do |
1263 | { | |
1264 | last_time = catchlist == catch; | |
82da7701 JB |
1265 | |
1266 | /* Unwind the specpdl stack, and then restore the proper set of | |
1267 | handlers. */ | |
db9f0278 JB |
1268 | unbind_to (catchlist->pdlcount, Qnil); |
1269 | handlerlist = catchlist->handlerlist; | |
1270 | catchlist = catchlist->next; | |
1271 | } | |
1272 | while (! last_time); | |
1273 | ||
a2a103bb | 1274 | #if HAVE_X_WINDOWS |
88019a63 RS |
1275 | /* If x_catch_errors was done, turn it off now. |
1276 | (First we give unbind_to a chance to do that.) */ | |
1277 | x_fully_uncatch_errors (); | |
a2a103bb | 1278 | #endif |
88019a63 | 1279 | |
bcf28080 | 1280 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1281 | gcprolist = catch->gcpro; |
15934ffa RS |
1282 | #ifdef DEBUG_GCPRO |
1283 | if (gcprolist != 0) | |
1284 | gcpro_level = gcprolist->level + 1; | |
1285 | else | |
1286 | gcpro_level = 0; | |
1287 | #endif | |
db9f0278 JB |
1288 | backtrace_list = catch->backlist; |
1289 | lisp_eval_depth = catch->lisp_eval_depth; | |
177c0ea7 | 1290 | |
ba410f40 | 1291 | _longjmp (catch->jmp, 1); |
db9f0278 JB |
1292 | } |
1293 | ||
1294 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
9dbc9081 PJ |
1295 | doc: /* Throw to the catch for TAG and return VALUE from it. |
1296 | Both TAG and VALUE are evalled. */) | |
1297 | (tag, value) | |
79e8bfbf | 1298 | register Lisp_Object tag, value; |
db9f0278 JB |
1299 | { |
1300 | register struct catchtag *c; | |
1301 | ||
8788120f KS |
1302 | if (!NILP (tag)) |
1303 | for (c = catchlist; c; c = c->next) | |
1304 | { | |
1305 | if (EQ (c->tag, tag)) | |
1306 | unwind_to_catch (c, value); | |
1307 | } | |
734d55a2 | 1308 | xsignal2 (Qno_catch, tag, value); |
db9f0278 JB |
1309 | } |
1310 | ||
1311 | ||
1312 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1313 | doc: /* Do BODYFORM, protecting with UNWINDFORMS. |
1314 | If BODYFORM completes normally, its value is returned | |
1315 | after executing the UNWINDFORMS. | |
1316 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
7a25dc6d | 1317 | usage: (unwind-protect BODYFORM UNWINDFORMS...) */) |
9dbc9081 | 1318 | (args) |
db9f0278 JB |
1319 | Lisp_Object args; |
1320 | { | |
1321 | Lisp_Object val; | |
aed13378 | 1322 | int count = SPECPDL_INDEX (); |
db9f0278 | 1323 | |
04b28167 | 1324 | record_unwind_protect (Fprogn, Fcdr (args)); |
db9f0278 | 1325 | val = Feval (Fcar (args)); |
177c0ea7 | 1326 | return unbind_to (count, val); |
db9f0278 JB |
1327 | } |
1328 | \f | |
1329 | /* Chain of condition handlers currently in effect. | |
1330 | The elements of this chain are contained in the stack frames | |
1331 | of Fcondition_case and internal_condition_case. | |
1332 | When an error is signaled (by calling Fsignal, below), | |
1333 | this chain is searched for an element that applies. */ | |
1334 | ||
1335 | struct handler *handlerlist; | |
1336 | ||
1337 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
9dbc9081 | 1338 | doc: /* Regain control when an error is signaled. |
1b1acc13 | 1339 | Executes BODYFORM and returns its value if no error happens. |
9dbc9081 PJ |
1340 | Each element of HANDLERS looks like (CONDITION-NAME BODY...) |
1341 | where the BODY is made of Lisp expressions. | |
1342 | ||
1343 | A handler is applicable to an error | |
1344 | if CONDITION-NAME is one of the error's condition names. | |
1345 | If an error happens, the first applicable handler is run. | |
1346 | ||
1347 | The car of a handler may be a list of condition names | |
1348 | instead of a single condition name. | |
1349 | ||
1350 | When a handler handles an error, | |
1351 | control returns to the condition-case and the handler BODY... is executed | |
1352 | with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
1353 | VAR may be nil; then you do not get access to the signal information. | |
1354 | ||
1355 | The value of the last BODY form is returned from the condition-case. | |
1356 | See also the function `signal' for more info. | |
2b47b74d | 1357 | usage: (condition-case VAR BODYFORM &rest HANDLERS) */) |
9dbc9081 | 1358 | (args) |
db9f0278 JB |
1359 | Lisp_Object args; |
1360 | { | |
17401c97 GM |
1361 | register Lisp_Object bodyform, handlers; |
1362 | volatile Lisp_Object var; | |
db9f0278 | 1363 | |
82da7701 JB |
1364 | var = Fcar (args); |
1365 | bodyform = Fcar (Fcdr (args)); | |
1366 | handlers = Fcdr (Fcdr (args)); | |
ee830945 RS |
1367 | |
1368 | return internal_lisp_condition_case (var, bodyform, handlers); | |
1369 | } | |
1370 | ||
1371 | /* Like Fcondition_case, but the args are separate | |
1372 | rather than passed in a list. Used by Fbyte_code. */ | |
1373 | ||
1374 | Lisp_Object | |
1375 | internal_lisp_condition_case (var, bodyform, handlers) | |
1376 | volatile Lisp_Object var; | |
1377 | Lisp_Object bodyform, handlers; | |
1378 | { | |
1379 | Lisp_Object val; | |
1380 | struct catchtag c; | |
1381 | struct handler h; | |
1382 | ||
b7826503 | 1383 | CHECK_SYMBOL (var); |
82da7701 | 1384 | |
2b47b74d | 1385 | for (val = handlers; CONSP (val); val = XCDR (val)) |
82da7701 JB |
1386 | { |
1387 | Lisp_Object tem; | |
2b47b74d | 1388 | tem = XCAR (val); |
5f96776a RS |
1389 | if (! (NILP (tem) |
1390 | || (CONSP (tem) | |
03699b14 KR |
1391 | && (SYMBOLP (XCAR (tem)) |
1392 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1393 | error ("Invalid condition handler", tem); |
1394 | } | |
db9f0278 JB |
1395 | |
1396 | c.tag = Qnil; | |
1397 | c.val = Qnil; | |
1398 | c.backlist = backtrace_list; | |
1399 | c.handlerlist = handlerlist; | |
1400 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1401 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1402 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1403 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1404 | c.gcpro = gcprolist; |
bcf28080 | 1405 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1406 | if (_setjmp (c.jmp)) |
1407 | { | |
265a9e55 | 1408 | if (!NILP (h.var)) |
9d58218c RS |
1409 | specbind (h.var, c.val); |
1410 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1411 | |
1412 | /* Note that this just undoes the binding of h.var; whoever | |
1413 | longjumped to us unwound the stack to c.pdlcount before | |
1414 | throwing. */ | |
db9f0278 JB |
1415 | unbind_to (c.pdlcount, Qnil); |
1416 | return val; | |
1417 | } | |
1418 | c.next = catchlist; | |
1419 | catchlist = &c; | |
177c0ea7 | 1420 | |
82da7701 JB |
1421 | h.var = var; |
1422 | h.handler = handlers; | |
db9f0278 | 1423 | h.next = handlerlist; |
db9f0278 JB |
1424 | h.tag = &c; |
1425 | handlerlist = &h; | |
1426 | ||
82da7701 | 1427 | val = Feval (bodyform); |
db9f0278 JB |
1428 | catchlist = c.next; |
1429 | handlerlist = h.next; | |
1430 | return val; | |
1431 | } | |
1432 | ||
f029ca5f RS |
1433 | /* Call the function BFUN with no arguments, catching errors within it |
1434 | according to HANDLERS. If there is an error, call HFUN with | |
1435 | one argument which is the data that describes the error: | |
1436 | (SIGNALNAME . DATA) | |
1437 | ||
1438 | HANDLERS can be a list of conditions to catch. | |
1439 | If HANDLERS is Qt, catch all errors. | |
1440 | If HANDLERS is Qerror, catch all errors | |
1441 | but allow the debugger to run if that is enabled. */ | |
1442 | ||
db9f0278 JB |
1443 | Lisp_Object |
1444 | internal_condition_case (bfun, handlers, hfun) | |
1445 | Lisp_Object (*bfun) (); | |
1446 | Lisp_Object handlers; | |
1447 | Lisp_Object (*hfun) (); | |
1448 | { | |
1449 | Lisp_Object val; | |
1450 | struct catchtag c; | |
1451 | struct handler h; | |
1452 | ||
88019a63 RS |
1453 | /* Since Fsignal will close off all calls to x_catch_errors, |
1454 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1455 | #if HAVE_X_WINDOWS |
88019a63 | 1456 | if (x_catching_errors ()) |
01591d17 | 1457 | abort (); |
a2a103bb | 1458 | #endif |
01591d17 | 1459 | |
db9f0278 JB |
1460 | c.tag = Qnil; |
1461 | c.val = Qnil; | |
1462 | c.backlist = backtrace_list; | |
1463 | c.handlerlist = handlerlist; | |
1464 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1465 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1466 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1467 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1468 | c.gcpro = gcprolist; |
bcf28080 | 1469 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1470 | if (_setjmp (c.jmp)) |
1471 | { | |
9d58218c | 1472 | return (*hfun) (c.val); |
db9f0278 JB |
1473 | } |
1474 | c.next = catchlist; | |
1475 | catchlist = &c; | |
1476 | h.handler = handlers; | |
1477 | h.var = Qnil; | |
db9f0278 JB |
1478 | h.next = handlerlist; |
1479 | h.tag = &c; | |
1480 | handlerlist = &h; | |
1481 | ||
1482 | val = (*bfun) (); | |
1483 | catchlist = c.next; | |
1484 | handlerlist = h.next; | |
1485 | return val; | |
1486 | } | |
1487 | ||
2659a09f | 1488 | /* Like internal_condition_case but call BFUN with ARG as its argument. */ |
f029ca5f | 1489 | |
d227775c RS |
1490 | Lisp_Object |
1491 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1492 | Lisp_Object (*bfun) (); | |
1493 | Lisp_Object arg; | |
1494 | Lisp_Object handlers; | |
1495 | Lisp_Object (*hfun) (); | |
1496 | { | |
1497 | Lisp_Object val; | |
1498 | struct catchtag c; | |
1499 | struct handler h; | |
1500 | ||
88019a63 RS |
1501 | /* Since Fsignal will close off all calls to x_catch_errors, |
1502 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1503 | #if HAVE_X_WINDOWS |
88019a63 RS |
1504 | if (x_catching_errors ()) |
1505 | abort (); | |
a2a103bb | 1506 | #endif |
88019a63 | 1507 | |
d227775c RS |
1508 | c.tag = Qnil; |
1509 | c.val = Qnil; | |
1510 | c.backlist = backtrace_list; | |
1511 | c.handlerlist = handlerlist; | |
1512 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1513 | c.pdlcount = SPECPDL_INDEX (); |
d227775c | 1514 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1515 | c.interrupt_input_blocked = interrupt_input_blocked; |
d227775c | 1516 | c.gcpro = gcprolist; |
bcf28080 | 1517 | c.byte_stack = byte_stack_list; |
d227775c RS |
1518 | if (_setjmp (c.jmp)) |
1519 | { | |
9d58218c | 1520 | return (*hfun) (c.val); |
d227775c RS |
1521 | } |
1522 | c.next = catchlist; | |
1523 | catchlist = &c; | |
1524 | h.handler = handlers; | |
1525 | h.var = Qnil; | |
1526 | h.next = handlerlist; | |
1527 | h.tag = &c; | |
1528 | handlerlist = &h; | |
1529 | ||
1530 | val = (*bfun) (arg); | |
1531 | catchlist = c.next; | |
1532 | handlerlist = h.next; | |
1533 | return val; | |
1534 | } | |
10b29d41 GM |
1535 | |
1536 | ||
2659a09f | 1537 | /* Like internal_condition_case but call BFUN with NARGS as first, |
10b29d41 GM |
1538 | and ARGS as second argument. */ |
1539 | ||
1540 | Lisp_Object | |
1541 | internal_condition_case_2 (bfun, nargs, args, handlers, hfun) | |
1542 | Lisp_Object (*bfun) (); | |
1543 | int nargs; | |
1544 | Lisp_Object *args; | |
1545 | Lisp_Object handlers; | |
1546 | Lisp_Object (*hfun) (); | |
1547 | { | |
1548 | Lisp_Object val; | |
1549 | struct catchtag c; | |
1550 | struct handler h; | |
1551 | ||
88019a63 RS |
1552 | /* Since Fsignal will close off all calls to x_catch_errors, |
1553 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1554 | #if HAVE_X_WINDOWS |
88019a63 RS |
1555 | if (x_catching_errors ()) |
1556 | abort (); | |
a2a103bb | 1557 | #endif |
88019a63 | 1558 | |
10b29d41 GM |
1559 | c.tag = Qnil; |
1560 | c.val = Qnil; | |
1561 | c.backlist = backtrace_list; | |
1562 | c.handlerlist = handlerlist; | |
1563 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1564 | c.pdlcount = SPECPDL_INDEX (); |
10b29d41 | 1565 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1566 | c.interrupt_input_blocked = interrupt_input_blocked; |
10b29d41 GM |
1567 | c.gcpro = gcprolist; |
1568 | c.byte_stack = byte_stack_list; | |
1569 | if (_setjmp (c.jmp)) | |
1570 | { | |
1571 | return (*hfun) (c.val); | |
1572 | } | |
1573 | c.next = catchlist; | |
1574 | catchlist = &c; | |
1575 | h.handler = handlers; | |
1576 | h.var = Qnil; | |
1577 | h.next = handlerlist; | |
1578 | h.tag = &c; | |
1579 | handlerlist = &h; | |
1580 | ||
1581 | val = (*bfun) (nargs, args); | |
1582 | catchlist = c.next; | |
1583 | handlerlist = h.next; | |
1584 | return val; | |
1585 | } | |
1586 | ||
d227775c | 1587 | \f |
2901f1d1 | 1588 | static Lisp_Object find_handler_clause P_ ((Lisp_Object, Lisp_Object, |
f01cbfdd | 1589 | Lisp_Object, Lisp_Object)); |
db9f0278 JB |
1590 | |
1591 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
9dbc9081 PJ |
1592 | doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA. |
1593 | This function does not return. | |
1594 | ||
1595 | An error symbol is a symbol with an `error-conditions' property | |
1596 | that is a list of condition names. | |
1597 | A handler for any of those names will get to handle this signal. | |
1598 | The symbol `error' should normally be one of them. | |
1599 | ||
1600 | DATA should be a list. Its elements are printed as part of the error message. | |
3297ec22 LT |
1601 | See Info anchor `(elisp)Definition of signal' for some details on how this |
1602 | error message is constructed. | |
9dbc9081 PJ |
1603 | If the signal is handled, DATA is made available to the handler. |
1604 | See also the function `condition-case'. */) | |
1605 | (error_symbol, data) | |
4200e719 | 1606 | Lisp_Object error_symbol, data; |
db9f0278 | 1607 | { |
bfa8ca43 | 1608 | /* When memory is full, ERROR-SYMBOL is nil, |
26631f2b RS |
1609 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). |
1610 | That is a special case--don't do this in other situations. */ | |
db9f0278 JB |
1611 | register struct handler *allhandlers = handlerlist; |
1612 | Lisp_Object conditions; | |
1613 | extern int gc_in_progress; | |
1614 | extern int waiting_for_input; | |
c11d3d17 | 1615 | Lisp_Object string; |
1ea9dec4 | 1616 | Lisp_Object real_error_symbol; |
a2ff3819 | 1617 | struct backtrace *bp; |
db9f0278 | 1618 | |
346598f1 | 1619 | immediate_quit = handling_signal = 0; |
d063129f | 1620 | abort_on_gc = 0; |
db9f0278 JB |
1621 | if (gc_in_progress || waiting_for_input) |
1622 | abort (); | |
1623 | ||
1ea9dec4 RS |
1624 | if (NILP (error_symbol)) |
1625 | real_error_symbol = Fcar (data); | |
1626 | else | |
1627 | real_error_symbol = error_symbol; | |
1628 | ||
26631f2b RS |
1629 | #if 0 /* rms: I don't know why this was here, |
1630 | but it is surely wrong for an error that is handled. */ | |
48f8dfa3 | 1631 | #ifdef HAVE_X_WINDOWS |
df6c90d8 GM |
1632 | if (display_hourglass_p) |
1633 | cancel_hourglass (); | |
48f8dfa3 | 1634 | #endif |
177c0ea7 | 1635 | #endif |
48f8dfa3 | 1636 | |
61ede770 | 1637 | /* This hook is used by edebug. */ |
26631f2b RS |
1638 | if (! NILP (Vsignal_hook_function) |
1639 | && ! NILP (error_symbol)) | |
9f5903bb RS |
1640 | { |
1641 | /* Edebug takes care of restoring these variables when it exits. */ | |
1642 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1643 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1644 | ||
1645 | if (SPECPDL_INDEX () + 40 > max_specpdl_size) | |
1646 | max_specpdl_size = SPECPDL_INDEX () + 40; | |
1647 | ||
1648 | call2 (Vsignal_hook_function, error_symbol, data); | |
1649 | } | |
61ede770 | 1650 | |
1ea9dec4 | 1651 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1652 | |
a2ff3819 GM |
1653 | /* Remember from where signal was called. Skip over the frame for |
1654 | `signal' itself. If a frame for `error' follows, skip that, | |
26631f2b RS |
1655 | too. Don't do this when ERROR_SYMBOL is nil, because that |
1656 | is a memory-full error. */ | |
090a072f | 1657 | Vsignaling_function = Qnil; |
26631f2b | 1658 | if (backtrace_list && !NILP (error_symbol)) |
090a072f GM |
1659 | { |
1660 | bp = backtrace_list->next; | |
1661 | if (bp && bp->function && EQ (*bp->function, Qerror)) | |
1662 | bp = bp->next; | |
1663 | if (bp && bp->function) | |
1664 | Vsignaling_function = *bp->function; | |
1665 | } | |
a2ff3819 | 1666 | |
db9f0278 JB |
1667 | for (; handlerlist; handlerlist = handlerlist->next) |
1668 | { | |
1669 | register Lisp_Object clause; | |
177c0ea7 | 1670 | |
db9f0278 | 1671 | clause = find_handler_clause (handlerlist->handler, conditions, |
f01cbfdd | 1672 | error_symbol, data); |
db9f0278 | 1673 | |
db9f0278 | 1674 | if (EQ (clause, Qlambda)) |
82da7701 | 1675 | { |
690337b7 KH |
1676 | /* We can't return values to code which signaled an error, but we |
1677 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1678 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1679 | return Qnil; |
1680 | else | |
d3e6f8be | 1681 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1682 | } |
db9f0278 | 1683 | |
265a9e55 | 1684 | if (!NILP (clause)) |
db9f0278 | 1685 | { |
9d58218c | 1686 | Lisp_Object unwind_data; |
db9f0278 | 1687 | struct handler *h = handlerlist; |
9d58218c | 1688 | |
db9f0278 | 1689 | handlerlist = allhandlers; |
1ea9dec4 RS |
1690 | |
1691 | if (NILP (error_symbol)) | |
1692 | unwind_data = data; | |
9d58218c RS |
1693 | else |
1694 | unwind_data = Fcons (error_symbol, data); | |
1695 | h->chosen_clause = clause; | |
1696 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1697 | } |
1698 | } | |
1699 | ||
1700 | handlerlist = allhandlers; | |
1701 | /* If no handler is present now, try to run the debugger, | |
1702 | and if that fails, throw to top level. */ | |
f01cbfdd | 1703 | find_handler_clause (Qerror, conditions, error_symbol, data); |
c11d3d17 RS |
1704 | if (catchlist != 0) |
1705 | Fthrow (Qtop_level, Qt); | |
1706 | ||
1ea9dec4 | 1707 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1708 | data = Fcons (error_symbol, data); |
1709 | ||
1710 | string = Ferror_message_string (data); | |
d5db4077 | 1711 | fatal ("%s", SDATA (string), 0); |
db9f0278 JB |
1712 | } |
1713 | ||
734d55a2 KS |
1714 | /* Internal version of Fsignal that never returns. |
1715 | Used for anything but Qquit (which can return from Fsignal). */ | |
1716 | ||
1717 | void | |
1718 | xsignal (error_symbol, data) | |
1719 | Lisp_Object error_symbol, data; | |
1720 | { | |
1721 | Fsignal (error_symbol, data); | |
1722 | abort (); | |
1723 | } | |
1724 | ||
1725 | /* Like xsignal, but takes 0, 1, 2, or 3 args instead of a list. */ | |
1726 | ||
1727 | void | |
1728 | xsignal0 (error_symbol) | |
1729 | Lisp_Object error_symbol; | |
1730 | { | |
1731 | xsignal (error_symbol, Qnil); | |
1732 | } | |
1733 | ||
1734 | void | |
1735 | xsignal1 (error_symbol, arg) | |
1736 | Lisp_Object error_symbol, arg; | |
1737 | { | |
1738 | xsignal (error_symbol, list1 (arg)); | |
1739 | } | |
1740 | ||
1741 | void | |
1742 | xsignal2 (error_symbol, arg1, arg2) | |
1743 | Lisp_Object error_symbol, arg1, arg2; | |
1744 | { | |
1745 | xsignal (error_symbol, list2 (arg1, arg2)); | |
1746 | } | |
1747 | ||
1748 | void | |
1749 | xsignal3 (error_symbol, arg1, arg2, arg3) | |
1750 | Lisp_Object error_symbol, arg1, arg2, arg3; | |
1751 | { | |
1752 | xsignal (error_symbol, list3 (arg1, arg2, arg3)); | |
1753 | } | |
1754 | ||
1755 | /* Signal `error' with message S, and additional arg ARG. | |
1756 | If ARG is not a genuine list, make it a one-element list. */ | |
1757 | ||
1758 | void | |
1759 | signal_error (s, arg) | |
1760 | char *s; | |
1761 | Lisp_Object arg; | |
1762 | { | |
1763 | Lisp_Object tortoise, hare; | |
1764 | ||
1765 | hare = tortoise = arg; | |
1766 | while (CONSP (hare)) | |
1767 | { | |
1768 | hare = XCDR (hare); | |
1769 | if (!CONSP (hare)) | |
1770 | break; | |
1771 | ||
1772 | hare = XCDR (hare); | |
1773 | tortoise = XCDR (tortoise); | |
1774 | ||
1775 | if (EQ (hare, tortoise)) | |
1776 | break; | |
1777 | } | |
1778 | ||
1779 | if (!NILP (hare)) | |
1780 | arg = Fcons (arg, Qnil); /* Make it a list. */ | |
1781 | ||
1782 | xsignal (Qerror, Fcons (build_string (s), arg)); | |
1783 | } | |
1784 | ||
1785 | ||
e0f24100 | 1786 | /* Return nonzero if LIST is a non-nil atom or |
128c0f66 RM |
1787 | a list containing one of CONDITIONS. */ |
1788 | ||
1789 | static int | |
1790 | wants_debugger (list, conditions) | |
1791 | Lisp_Object list, conditions; | |
1792 | { | |
4de86b16 | 1793 | if (NILP (list)) |
128c0f66 RM |
1794 | return 0; |
1795 | if (! CONSP (list)) | |
1796 | return 1; | |
1797 | ||
ab67260b | 1798 | while (CONSP (conditions)) |
128c0f66 | 1799 | { |
ab67260b | 1800 | Lisp_Object this, tail; |
03699b14 KR |
1801 | this = XCAR (conditions); |
1802 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1803 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1804 | return 1; |
03699b14 | 1805 | conditions = XCDR (conditions); |
128c0f66 | 1806 | } |
ab67260b | 1807 | return 0; |
128c0f66 RM |
1808 | } |
1809 | ||
fc950e09 KH |
1810 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1811 | and described by SIGNAL-DATA, should skip the debugger | |
1b1acc13 | 1812 | according to debugger-ignored-errors. */ |
fc950e09 KH |
1813 | |
1814 | static int | |
1815 | skip_debugger (conditions, data) | |
1816 | Lisp_Object conditions, data; | |
1817 | { | |
1818 | Lisp_Object tail; | |
1819 | int first_string = 1; | |
1820 | Lisp_Object error_message; | |
1821 | ||
17401c97 GM |
1822 | error_message = Qnil; |
1823 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1824 | { |
03699b14 | 1825 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1826 | { |
1827 | if (first_string) | |
1828 | { | |
1829 | error_message = Ferror_message_string (data); | |
1830 | first_string = 0; | |
1831 | } | |
177c0ea7 | 1832 | |
03699b14 | 1833 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1834 | return 1; |
1835 | } | |
1836 | else | |
1837 | { | |
1838 | Lisp_Object contail; | |
1839 | ||
17401c97 | 1840 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1841 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1842 | return 1; |
1843 | } | |
1844 | } | |
1845 | ||
1846 | return 0; | |
1847 | } | |
1848 | ||
128c0f66 | 1849 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1850 | There are two ways to pass SIG and DATA: |
9b942ebd | 1851 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1852 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1853 | This is for memory-full errors only. |
1ea9dec4 | 1854 | |
9f5903bb RS |
1855 | We need to increase max_specpdl_size temporarily around |
1856 | anything we do that can push on the specpdl, so as not to get | |
1857 | a second error here in case we're handling specpdl overflow. */ | |
db9f0278 JB |
1858 | |
1859 | static Lisp_Object | |
f01cbfdd | 1860 | find_handler_clause (handlers, conditions, sig, data) |
db9f0278 | 1861 | Lisp_Object handlers, conditions, sig, data; |
db9f0278 JB |
1862 | { |
1863 | register Lisp_Object h; | |
1864 | register Lisp_Object tem; | |
f01cbfdd RS |
1865 | int debugger_called = 0; |
1866 | int debugger_considered = 0; | |
db9f0278 | 1867 | |
f01cbfdd RS |
1868 | /* t is used by handlers for all conditions, set up by C code. */ |
1869 | if (EQ (handlers, Qt)) | |
db9f0278 | 1870 | return Qt; |
f01cbfdd RS |
1871 | |
1872 | /* Don't run the debugger for a memory-full error. | |
1873 | (There is no room in memory to do that!) */ | |
1874 | if (NILP (sig)) | |
1875 | debugger_considered = 1; | |
1876 | ||
61ede770 RS |
1877 | /* error is used similarly, but means print an error message |
1878 | and run the debugger if that is enabled. */ | |
1879 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1880 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1881 | there is a handler. */ | |
db9f0278 | 1882 | { |
f01cbfdd | 1883 | if (!NILP (sig) && wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b | 1884 | { |
9f5903bb | 1885 | max_specpdl_size++; |
f01cbfdd | 1886 | #ifdef PROTOTYPES |
88817f3b RS |
1887 | internal_with_output_to_temp_buffer ("*Backtrace*", |
1888 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1889 | Qnil); | |
f01cbfdd | 1890 | #else |
88817f3b RS |
1891 | internal_with_output_to_temp_buffer ("*Backtrace*", |
1892 | Fbacktrace, Qnil); | |
f01cbfdd | 1893 | #endif |
9f5903bb | 1894 | max_specpdl_size--; |
88817f3b | 1895 | } |
f01cbfdd RS |
1896 | |
1897 | if (!debugger_considered) | |
db9f0278 | 1898 | { |
f01cbfdd RS |
1899 | debugger_considered = 1; |
1900 | debugger_called = maybe_call_debugger (conditions, sig, data); | |
61ede770 | 1901 | } |
f01cbfdd | 1902 | |
61ede770 RS |
1903 | /* If there is no handler, return saying whether we ran the debugger. */ |
1904 | if (EQ (handlers, Qerror)) | |
1905 | { | |
1906 | if (debugger_called) | |
9f5903bb | 1907 | return Qlambda; |
61ede770 | 1908 | return Qt; |
db9f0278 | 1909 | } |
db9f0278 | 1910 | } |
f01cbfdd | 1911 | |
db9f0278 JB |
1912 | for (h = handlers; CONSP (h); h = Fcdr (h)) |
1913 | { | |
5f96776a RS |
1914 | Lisp_Object handler, condit; |
1915 | ||
1916 | handler = Fcar (h); | |
1917 | if (!CONSP (handler)) | |
db9f0278 | 1918 | continue; |
5f96776a RS |
1919 | condit = Fcar (handler); |
1920 | /* Handle a single condition name in handler HANDLER. */ | |
1921 | if (SYMBOLP (condit)) | |
1922 | { | |
1923 | tem = Fmemq (Fcar (handler), conditions); | |
1924 | if (!NILP (tem)) | |
1925 | return handler; | |
1926 | } | |
1927 | /* Handle a list of condition names in handler HANDLER. */ | |
1928 | else if (CONSP (condit)) | |
1929 | { | |
f01cbfdd RS |
1930 | Lisp_Object tail; |
1931 | for (tail = condit; CONSP (tail); tail = XCDR (tail)) | |
5f96776a | 1932 | { |
f01cbfdd | 1933 | tem = Fmemq (Fcar (tail), conditions); |
5f96776a | 1934 | if (!NILP (tem)) |
f01cbfdd RS |
1935 | { |
1936 | /* This handler is going to apply. | |
1937 | Does it allow the debugger to run first? */ | |
1938 | if (! debugger_considered && !NILP (Fmemq (Qdebug, condit))) | |
1939 | maybe_call_debugger (conditions, sig, data); | |
1940 | return handler; | |
1941 | } | |
5f96776a RS |
1942 | } |
1943 | } | |
db9f0278 | 1944 | } |
f01cbfdd | 1945 | |
db9f0278 JB |
1946 | return Qnil; |
1947 | } | |
1948 | ||
f01cbfdd RS |
1949 | /* Call the debugger if calling it is currently enabled for CONDITIONS. |
1950 | SIG and DATA describe the signal, as in find_handler_clause. */ | |
1951 | ||
1952 | int | |
1953 | maybe_call_debugger (conditions, sig, data) | |
1954 | Lisp_Object conditions, sig, data; | |
1955 | { | |
1956 | Lisp_Object combined_data; | |
1957 | ||
1958 | combined_data = Fcons (sig, data); | |
1959 | ||
1960 | if ( | |
1961 | /* Don't try to run the debugger with interrupts blocked. | |
1962 | The editing loop would return anyway. */ | |
1963 | ! INPUT_BLOCKED_P | |
1964 | /* Does user wants to enter debugger for this kind of error? */ | |
1965 | && (EQ (sig, Qquit) | |
1966 | ? debug_on_quit | |
1967 | : wants_debugger (Vdebug_on_error, conditions)) | |
1968 | && ! skip_debugger (conditions, combined_data) | |
1969 | /* rms: what's this for? */ | |
1970 | && when_entered_debugger < num_nonmacro_input_events) | |
1971 | { | |
1972 | call_debugger (Fcons (Qerror, Fcons (combined_data, Qnil))); | |
1973 | return 1; | |
1974 | } | |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
db9f0278 JB |
1979 | /* dump an error message; called like printf */ |
1980 | ||
1981 | /* VARARGS 1 */ | |
1982 | void | |
1983 | error (m, a1, a2, a3) | |
1984 | char *m; | |
9125da08 | 1985 | char *a1, *a2, *a3; |
db9f0278 JB |
1986 | { |
1987 | char buf[200]; | |
9125da08 RS |
1988 | int size = 200; |
1989 | int mlen; | |
1990 | char *buffer = buf; | |
1991 | char *args[3]; | |
1992 | int allocated = 0; | |
1993 | Lisp_Object string; | |
1994 | ||
1995 | args[0] = a1; | |
1996 | args[1] = a2; | |
1997 | args[2] = a3; | |
1998 | ||
1999 | mlen = strlen (m); | |
db9f0278 JB |
2000 | |
2001 | while (1) | |
9125da08 | 2002 | { |
955f3ff9 | 2003 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
2004 | if (used < size) |
2005 | break; | |
2006 | size *= 2; | |
2007 | if (allocated) | |
2008 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
2009 | else |
2010 | { | |
2011 | buffer = (char *) xmalloc (size); | |
2012 | allocated = 1; | |
2013 | } | |
9125da08 RS |
2014 | } |
2015 | ||
955f3ff9 | 2016 | string = build_string (buffer); |
9125da08 | 2017 | if (allocated) |
9ae6734f | 2018 | xfree (buffer); |
9125da08 | 2019 | |
734d55a2 | 2020 | xsignal1 (Qerror, string); |
db9f0278 JB |
2021 | } |
2022 | \f | |
e72706be | 2023 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 2, 0, |
9dbc9081 PJ |
2024 | doc: /* Non-nil if FUNCTION makes provisions for interactive calling. |
2025 | This means it contains a description for how to read arguments to give it. | |
2026 | The value is nil for an invalid function or a symbol with no function | |
2027 | definition. | |
2028 | ||
2029 | Interactively callable functions include strings and vectors (treated | |
2030 | as keyboard macros), lambda-expressions that contain a top-level call | |
2031 | to `interactive', autoload definitions made by `autoload' with non-nil | |
2032 | fourth argument, and some of the built-in functions of Lisp. | |
2033 | ||
e72706be RS |
2034 | Also, a symbol satisfies `commandp' if its function definition does so. |
2035 | ||
2036 | If the optional argument FOR-CALL-INTERACTIVELY is non-nil, | |
769b4fb2 | 2037 | then strings and vectors are not accepted. */) |
e72706be RS |
2038 | (function, for_call_interactively) |
2039 | Lisp_Object function, for_call_interactively; | |
db9f0278 JB |
2040 | { |
2041 | register Lisp_Object fun; | |
2042 | register Lisp_Object funcar; | |
52b71f49 | 2043 | Lisp_Object if_prop = Qnil; |
db9f0278 JB |
2044 | |
2045 | fun = function; | |
2046 | ||
52b71f49 SM |
2047 | fun = indirect_function (fun); /* Check cycles. */ |
2048 | if (NILP (fun) || EQ (fun, Qunbound)) | |
ffd56f97 | 2049 | return Qnil; |
db9f0278 | 2050 | |
52b71f49 SM |
2051 | /* Check an `interactive-form' property if present, analogous to the |
2052 | function-documentation property. */ | |
2053 | fun = function; | |
2054 | while (SYMBOLP (fun)) | |
2055 | { | |
2056 | Lisp_Object tmp = Fget (fun, intern ("interactive-form")); | |
2057 | if (!NILP (tmp)) | |
2058 | if_prop = Qt; | |
2059 | fun = Fsymbol_function (fun); | |
2060 | } | |
2061 | ||
db9f0278 JB |
2062 | /* Emacs primitives are interactive if their DEFUN specifies an |
2063 | interactive spec. */ | |
90165123 | 2064 | if (SUBRP (fun)) |
52b71f49 | 2065 | return XSUBR (fun)->prompt ? Qt : if_prop; |
db9f0278 JB |
2066 | |
2067 | /* Bytecode objects are interactive if they are long enough to | |
2068 | have an element whose index is COMPILED_INTERACTIVE, which is | |
2069 | where the interactive spec is stored. */ | |
90165123 | 2070 | else if (COMPILEDP (fun)) |
845975f5 | 2071 | return ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
52b71f49 | 2072 | ? Qt : if_prop); |
db9f0278 JB |
2073 | |
2074 | /* Strings and vectors are keyboard macros. */ | |
52b71f49 SM |
2075 | if (STRINGP (fun) || VECTORP (fun)) |
2076 | return NILP (for_call_interactively) ? Qt : Qnil; | |
db9f0278 JB |
2077 | |
2078 | /* Lists may represent commands. */ | |
2079 | if (!CONSP (fun)) | |
2080 | return Qnil; | |
ed16fb98 | 2081 | funcar = XCAR (fun); |
db9f0278 | 2082 | if (EQ (funcar, Qlambda)) |
52b71f49 | 2083 | return !NILP (Fassq (Qinteractive, Fcdr (XCDR (fun)))) ? Qt : if_prop; |
db9f0278 | 2084 | if (EQ (funcar, Qautoload)) |
52b71f49 | 2085 | return !NILP (Fcar (Fcdr (Fcdr (XCDR (fun))))) ? Qt : if_prop; |
db9f0278 JB |
2086 | else |
2087 | return Qnil; | |
2088 | } | |
2089 | ||
2090 | /* ARGSUSED */ | |
2091 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, | |
9dbc9081 PJ |
2092 | doc: /* Define FUNCTION to autoload from FILE. |
2093 | FUNCTION is a symbol; FILE is a file name string to pass to `load'. | |
2094 | Third arg DOCSTRING is documentation for the function. | |
2095 | Fourth arg INTERACTIVE if non-nil says function can be called interactively. | |
2096 | Fifth arg TYPE indicates the type of the object: | |
2097 | nil or omitted says FUNCTION is a function, | |
2098 | `keymap' says FUNCTION is really a keymap, and | |
2099 | `macro' or t says FUNCTION is really a macro. | |
2100 | Third through fifth args give info about the real definition. | |
2101 | They default to nil. | |
2102 | If FUNCTION is already defined other than as an autoload, | |
2103 | this does nothing and returns nil. */) | |
2104 | (function, file, docstring, interactive, type) | |
ee9ee63c | 2105 | Lisp_Object function, file, docstring, interactive, type; |
db9f0278 JB |
2106 | { |
2107 | #ifdef NO_ARG_ARRAY | |
2108 | Lisp_Object args[4]; | |
2109 | #endif | |
2110 | ||
b7826503 PJ |
2111 | CHECK_SYMBOL (function); |
2112 | CHECK_STRING (file); | |
db9f0278 JB |
2113 | |
2114 | /* If function is defined and not as an autoload, don't override */ | |
2115 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 2116 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 2117 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
2118 | return Qnil; |
2119 | ||
7973e637 SM |
2120 | if (NILP (Vpurify_flag)) |
2121 | /* Only add entries after dumping, because the ones before are | |
2122 | not useful and else we get loads of them from the loaddefs.el. */ | |
2123 | LOADHIST_ATTACH (Fcons (Qautoload, function)); | |
2124 | ||
db9f0278 JB |
2125 | #ifdef NO_ARG_ARRAY |
2126 | args[0] = file; | |
2127 | args[1] = docstring; | |
2128 | args[2] = interactive; | |
ee9ee63c | 2129 | args[3] = type; |
db9f0278 JB |
2130 | |
2131 | return Ffset (function, Fcons (Qautoload, Flist (4, &args[0]))); | |
2132 | #else /* NO_ARG_ARRAY */ | |
2133 | return Ffset (function, Fcons (Qautoload, Flist (4, &file))); | |
2134 | #endif /* not NO_ARG_ARRAY */ | |
2135 | } | |
2136 | ||
2137 | Lisp_Object | |
2138 | un_autoload (oldqueue) | |
2139 | Lisp_Object oldqueue; | |
2140 | { | |
2141 | register Lisp_Object queue, first, second; | |
2142 | ||
2143 | /* Queue to unwind is current value of Vautoload_queue. | |
2144 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
2145 | queue = Vautoload_queue; | |
2146 | Vautoload_queue = oldqueue; | |
2147 | while (CONSP (queue)) | |
2148 | { | |
e509f168 | 2149 | first = XCAR (queue); |
db9f0278 JB |
2150 | second = Fcdr (first); |
2151 | first = Fcar (first); | |
47b82df9 RS |
2152 | if (EQ (first, make_number (0))) |
2153 | Vfeatures = second; | |
db9f0278 JB |
2154 | else |
2155 | Ffset (first, second); | |
e509f168 | 2156 | queue = XCDR (queue); |
db9f0278 JB |
2157 | } |
2158 | return Qnil; | |
2159 | } | |
2160 | ||
ca20916b RS |
2161 | /* Load an autoloaded function. |
2162 | FUNNAME is the symbol which is the function's name. | |
2163 | FUNDEF is the autoload definition (a list). */ | |
2164 | ||
045ba794 | 2165 | void |
db9f0278 JB |
2166 | do_autoload (fundef, funname) |
2167 | Lisp_Object fundef, funname; | |
2168 | { | |
aed13378 | 2169 | int count = SPECPDL_INDEX (); |
cb81ac97 | 2170 | Lisp_Object fun, queue, first, second; |
ca20916b | 2171 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 | 2172 | |
aea6173f RS |
2173 | /* This is to make sure that loadup.el gives a clear picture |
2174 | of what files are preloaded and when. */ | |
ab4db096 RS |
2175 | if (! NILP (Vpurify_flag)) |
2176 | error ("Attempt to autoload %s while preparing to dump", | |
d5db4077 | 2177 | SDATA (SYMBOL_NAME (funname))); |
ab4db096 | 2178 | |
db9f0278 | 2179 | fun = funname; |
b7826503 | 2180 | CHECK_SYMBOL (funname); |
ca20916b | 2181 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 2182 | |
f87740dc | 2183 | /* Preserve the match data. */ |
89f2614d | 2184 | record_unwind_save_match_data (); |
177c0ea7 | 2185 | |
f87740dc | 2186 | /* Value saved here is to be restored into Vautoload_queue. */ |
db9f0278 JB |
2187 | record_unwind_protect (un_autoload, Vautoload_queue); |
2188 | Vautoload_queue = Qt; | |
4aac2302 | 2189 | Fload (Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil, Qt); |
2a49b6e5 | 2190 | |
f87740dc | 2191 | /* Save the old autoloads, in case we ever do an unload. */ |
2a49b6e5 RS |
2192 | queue = Vautoload_queue; |
2193 | while (CONSP (queue)) | |
2194 | { | |
e509f168 | 2195 | first = XCAR (queue); |
2a49b6e5 RS |
2196 | second = Fcdr (first); |
2197 | first = Fcar (first); | |
5739ce6b | 2198 | |
fe5195e8 | 2199 | if (SYMBOLP (first) && CONSP (second) && EQ (XCAR (second), Qautoload)) |
e509f168 | 2200 | Fput (first, Qautoload, (XCDR (second))); |
5739ce6b | 2201 | |
e509f168 | 2202 | queue = XCDR (queue); |
2a49b6e5 RS |
2203 | } |
2204 | ||
db9f0278 JB |
2205 | /* Once loading finishes, don't undo it. */ |
2206 | Vautoload_queue = Qt; | |
2207 | unbind_to (count, Qnil); | |
2208 | ||
a7f96a35 | 2209 | fun = Findirect_function (fun, Qnil); |
ffd56f97 | 2210 | |
76c2b0cc | 2211 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 | 2212 | error ("Autoloading failed to define function %s", |
d5db4077 | 2213 | SDATA (SYMBOL_NAME (funname))); |
ca20916b | 2214 | UNGCPRO; |
db9f0278 | 2215 | } |
4c576a83 | 2216 | |
db9f0278 JB |
2217 | \f |
2218 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
9dbc9081 PJ |
2219 | doc: /* Evaluate FORM and return its value. */) |
2220 | (form) | |
db9f0278 JB |
2221 | Lisp_Object form; |
2222 | { | |
2223 | Lisp_Object fun, val, original_fun, original_args; | |
2224 | Lisp_Object funcar; | |
2225 | struct backtrace backtrace; | |
2226 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2227 | ||
df470e3b | 2228 | if (handling_signal) |
48f8dfa3 | 2229 | abort (); |
177c0ea7 | 2230 | |
90165123 | 2231 | if (SYMBOLP (form)) |
2b9bde76 | 2232 | return Fsymbol_value (form); |
db9f0278 JB |
2233 | if (!CONSP (form)) |
2234 | return form; | |
2235 | ||
2236 | QUIT; | |
ee830945 RS |
2237 | if ((consing_since_gc > gc_cons_threshold |
2238 | && consing_since_gc > gc_relative_threshold) | |
2239 | || | |
2240 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
db9f0278 JB |
2241 | { |
2242 | GCPRO1 (form); | |
2243 | Fgarbage_collect (); | |
2244 | UNGCPRO; | |
2245 | } | |
2246 | ||
2247 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2248 | { | |
2249 | if (max_lisp_eval_depth < 100) | |
2250 | max_lisp_eval_depth = 100; | |
2251 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2252 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2253 | } |
2254 | ||
2255 | original_fun = Fcar (form); | |
2256 | original_args = Fcdr (form); | |
2257 | ||
2258 | backtrace.next = backtrace_list; | |
2259 | backtrace_list = &backtrace; | |
2260 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
2261 | backtrace.args = &original_args; | |
2262 | backtrace.nargs = UNEVALLED; | |
2263 | backtrace.evalargs = 1; | |
2264 | backtrace.debug_on_exit = 0; | |
2265 | ||
2266 | if (debug_on_next_call) | |
2267 | do_debug_on_call (Qt); | |
2268 | ||
2269 | /* At this point, only original_fun and original_args | |
2270 | have values that will be used below */ | |
2271 | retry: | |
8788120f KS |
2272 | |
2273 | /* Optimize for no indirection. */ | |
2274 | fun = original_fun; | |
2275 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2276 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2277 | fun = indirect_function (fun); | |
db9f0278 | 2278 | |
90165123 | 2279 | if (SUBRP (fun)) |
db9f0278 JB |
2280 | { |
2281 | Lisp_Object numargs; | |
166c822d | 2282 | Lisp_Object argvals[8]; |
db9f0278 JB |
2283 | Lisp_Object args_left; |
2284 | register int i, maxargs; | |
2285 | ||
2286 | args_left = original_args; | |
2287 | numargs = Flength (args_left); | |
2288 | ||
c1788fbc RS |
2289 | CHECK_CONS_LIST (); |
2290 | ||
db9f0278 JB |
2291 | if (XINT (numargs) < XSUBR (fun)->min_args || |
2292 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
734d55a2 | 2293 | xsignal2 (Qwrong_number_of_arguments, original_fun, numargs); |
db9f0278 JB |
2294 | |
2295 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2296 | { | |
2297 | backtrace.evalargs = 0; | |
2298 | val = (*XSUBR (fun)->function) (args_left); | |
2299 | goto done; | |
2300 | } | |
2301 | ||
2302 | if (XSUBR (fun)->max_args == MANY) | |
2303 | { | |
2304 | /* Pass a vector of evaluated arguments */ | |
2305 | Lisp_Object *vals; | |
2306 | register int argnum = 0; | |
2307 | ||
2308 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2309 | ||
2310 | GCPRO3 (args_left, fun, fun); | |
2311 | gcpro3.var = vals; | |
2312 | gcpro3.nvars = 0; | |
2313 | ||
265a9e55 | 2314 | while (!NILP (args_left)) |
db9f0278 JB |
2315 | { |
2316 | vals[argnum++] = Feval (Fcar (args_left)); | |
2317 | args_left = Fcdr (args_left); | |
2318 | gcpro3.nvars = argnum; | |
2319 | } | |
db9f0278 JB |
2320 | |
2321 | backtrace.args = vals; | |
2322 | backtrace.nargs = XINT (numargs); | |
2323 | ||
2324 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 2325 | UNGCPRO; |
db9f0278 JB |
2326 | goto done; |
2327 | } | |
2328 | ||
2329 | GCPRO3 (args_left, fun, fun); | |
2330 | gcpro3.var = argvals; | |
2331 | gcpro3.nvars = 0; | |
2332 | ||
2333 | maxargs = XSUBR (fun)->max_args; | |
2334 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
2335 | { | |
2336 | argvals[i] = Feval (Fcar (args_left)); | |
2337 | gcpro3.nvars = ++i; | |
2338 | } | |
2339 | ||
2340 | UNGCPRO; | |
2341 | ||
2342 | backtrace.args = argvals; | |
2343 | backtrace.nargs = XINT (numargs); | |
2344 | ||
2345 | switch (i) | |
2346 | { | |
2347 | case 0: | |
2348 | val = (*XSUBR (fun)->function) (); | |
2349 | goto done; | |
2350 | case 1: | |
2351 | val = (*XSUBR (fun)->function) (argvals[0]); | |
2352 | goto done; | |
2353 | case 2: | |
2354 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
2355 | goto done; | |
2356 | case 3: | |
2357 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2358 | argvals[2]); | |
2359 | goto done; | |
2360 | case 4: | |
2361 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2362 | argvals[2], argvals[3]); | |
2363 | goto done; | |
2364 | case 5: | |
2365 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2366 | argvals[3], argvals[4]); | |
2367 | goto done; | |
2368 | case 6: | |
2369 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2370 | argvals[3], argvals[4], argvals[5]); | |
2371 | goto done; | |
15c65264 RS |
2372 | case 7: |
2373 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2374 | argvals[3], argvals[4], argvals[5], | |
2375 | argvals[6]); | |
2376 | goto done; | |
db9f0278 | 2377 | |
166c822d KH |
2378 | case 8: |
2379 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2380 | argvals[3], argvals[4], argvals[5], | |
2381 | argvals[6], argvals[7]); | |
2382 | goto done; | |
2383 | ||
db9f0278 | 2384 | default: |
08564963 JB |
2385 | /* Someone has created a subr that takes more arguments than |
2386 | is supported by this code. We need to either rewrite the | |
2387 | subr to use a different argument protocol, or add more | |
2388 | cases to this switch. */ | |
2389 | abort (); | |
db9f0278 JB |
2390 | } |
2391 | } | |
90165123 | 2392 | if (COMPILEDP (fun)) |
db9f0278 JB |
2393 | val = apply_lambda (fun, original_args, 1); |
2394 | else | |
2395 | { | |
8788120f | 2396 | if (EQ (fun, Qunbound)) |
734d55a2 | 2397 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 2398 | if (!CONSP (fun)) |
734d55a2 KS |
2399 | xsignal1 (Qinvalid_function, original_fun); |
2400 | funcar = XCAR (fun); | |
90165123 | 2401 | if (!SYMBOLP (funcar)) |
734d55a2 | 2402 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2403 | if (EQ (funcar, Qautoload)) |
2404 | { | |
2405 | do_autoload (fun, original_fun); | |
2406 | goto retry; | |
2407 | } | |
2408 | if (EQ (funcar, Qmacro)) | |
2409 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
2410 | else if (EQ (funcar, Qlambda)) | |
2411 | val = apply_lambda (fun, original_args, 1); | |
db9f0278 | 2412 | else |
734d55a2 | 2413 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2414 | } |
2415 | done: | |
c1788fbc RS |
2416 | CHECK_CONS_LIST (); |
2417 | ||
db9f0278 JB |
2418 | lisp_eval_depth--; |
2419 | if (backtrace.debug_on_exit) | |
2420 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2421 | backtrace_list = backtrace.next; | |
824eb35e | 2422 | |
db9f0278 JB |
2423 | return val; |
2424 | } | |
2425 | \f | |
2426 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
9dbc9081 PJ |
2427 | doc: /* Call FUNCTION with our remaining args, using our last arg as list of args. |
2428 | Then return the value FUNCTION returns. | |
2429 | Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
2430 | usage: (apply FUNCTION &rest ARGUMENTS) */) | |
2431 | (nargs, args) | |
db9f0278 JB |
2432 | int nargs; |
2433 | Lisp_Object *args; | |
2434 | { | |
2435 | register int i, numargs; | |
2436 | register Lisp_Object spread_arg; | |
2437 | register Lisp_Object *funcall_args; | |
db9f0278 | 2438 | Lisp_Object fun; |
96d44c64 | 2439 | struct gcpro gcpro1; |
db9f0278 JB |
2440 | |
2441 | fun = args [0]; | |
2442 | funcall_args = 0; | |
2443 | spread_arg = args [nargs - 1]; | |
b7826503 | 2444 | CHECK_LIST (spread_arg); |
177c0ea7 | 2445 | |
db9f0278 JB |
2446 | numargs = XINT (Flength (spread_arg)); |
2447 | ||
2448 | if (numargs == 0) | |
2449 | return Ffuncall (nargs - 1, args); | |
2450 | else if (numargs == 1) | |
2451 | { | |
03699b14 | 2452 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2453 | return Ffuncall (nargs, args); |
2454 | } | |
2455 | ||
a6e3fa71 | 2456 | numargs += nargs - 2; |
db9f0278 | 2457 | |
8788120f KS |
2458 | /* Optimize for no indirection. */ |
2459 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2460 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2461 | fun = indirect_function (fun); | |
ffd56f97 | 2462 | if (EQ (fun, Qunbound)) |
db9f0278 | 2463 | { |
ffd56f97 JB |
2464 | /* Let funcall get the error */ |
2465 | fun = args[0]; | |
2466 | goto funcall; | |
db9f0278 JB |
2467 | } |
2468 | ||
90165123 | 2469 | if (SUBRP (fun)) |
db9f0278 JB |
2470 | { |
2471 | if (numargs < XSUBR (fun)->min_args | |
2472 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2473 | goto funcall; /* Let funcall get the error */ | |
2474 | else if (XSUBR (fun)->max_args > numargs) | |
2475 | { | |
2476 | /* Avoid making funcall cons up a yet another new vector of arguments | |
2477 | by explicitly supplying nil's for optional values */ | |
2478 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
2479 | * sizeof (Lisp_Object)); | |
2480 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
2481 | funcall_args[++i] = Qnil; | |
96d44c64 SM |
2482 | GCPRO1 (*funcall_args); |
2483 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2484 | } |
2485 | } | |
2486 | funcall: | |
2487 | /* We add 1 to numargs because funcall_args includes the | |
2488 | function itself as well as its arguments. */ | |
2489 | if (!funcall_args) | |
a6e3fa71 JB |
2490 | { |
2491 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
2492 | * sizeof (Lisp_Object)); | |
96d44c64 SM |
2493 | GCPRO1 (*funcall_args); |
2494 | gcpro1.nvars = 1 + numargs; | |
a6e3fa71 JB |
2495 | } |
2496 | ||
db9f0278 JB |
2497 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
2498 | /* Spread the last arg we got. Its first element goes in | |
2499 | the slot that it used to occupy, hence this value of I. */ | |
2500 | i = nargs - 1; | |
265a9e55 | 2501 | while (!NILP (spread_arg)) |
db9f0278 | 2502 | { |
03699b14 KR |
2503 | funcall_args [i++] = XCAR (spread_arg); |
2504 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2505 | } |
a6e3fa71 | 2506 | |
96d44c64 SM |
2507 | /* By convention, the caller needs to gcpro Ffuncall's args. */ |
2508 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
2509 | } |
2510 | \f | |
ff936e53 SM |
2511 | /* Run hook variables in various ways. */ |
2512 | ||
2513 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2901f1d1 SM |
2514 | static Lisp_Object run_hook_with_args P_ ((int, Lisp_Object *, |
2515 | enum run_hooks_condition)); | |
ff936e53 | 2516 | |
8b5176cd | 2517 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
9f685258 | 2518 | doc: /* Run each hook in HOOKS. |
9dbc9081 PJ |
2519 | Each argument should be a symbol, a hook variable. |
2520 | These symbols are processed in the order specified. | |
2521 | If a hook symbol has a non-nil value, that value may be a function | |
2522 | or a list of functions to be called to run the hook. | |
2523 | If the value is a function, it is called with no arguments. | |
2524 | If it is a list, the elements are called, in order, with no arguments. | |
2525 | ||
9f685258 LK |
2526 | Major modes should not use this function directly to run their mode |
2527 | hook; they should use `run-mode-hooks' instead. | |
2528 | ||
72e85d5d RS |
2529 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2530 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2531 | usage: (run-hooks &rest HOOKS) */) |
2532 | (nargs, args) | |
ff936e53 SM |
2533 | int nargs; |
2534 | Lisp_Object *args; | |
2535 | { | |
2536 | Lisp_Object hook[1]; | |
2537 | register int i; | |
2538 | ||
2539 | for (i = 0; i < nargs; i++) | |
2540 | { | |
2541 | hook[0] = args[i]; | |
2542 | run_hook_with_args (1, hook, to_completion); | |
2543 | } | |
2544 | ||
2545 | return Qnil; | |
2546 | } | |
177c0ea7 | 2547 | |
a0d76c27 | 2548 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
9dbc9081 PJ |
2549 | Srun_hook_with_args, 1, MANY, 0, |
2550 | doc: /* Run HOOK with the specified arguments ARGS. | |
2551 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
2552 | value, that value may be a function or a list of functions to be | |
2553 | called to run the hook. If the value is a function, it is called with | |
2554 | the given arguments and its return value is returned. If it is a list | |
2555 | of functions, those functions are called, in order, | |
2556 | with the given arguments ARGS. | |
d5e2c90c | 2557 | It is best not to depend on the value returned by `run-hook-with-args', |
9dbc9081 PJ |
2558 | as that may change. |
2559 | ||
72e85d5d RS |
2560 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2561 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2562 | usage: (run-hook-with-args HOOK &rest ARGS) */) |
2563 | (nargs, args) | |
ff936e53 SM |
2564 | int nargs; |
2565 | Lisp_Object *args; | |
2566 | { | |
2567 | return run_hook_with_args (nargs, args, to_completion); | |
2568 | } | |
2569 | ||
a0d76c27 | 2570 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
9dbc9081 PJ |
2571 | Srun_hook_with_args_until_success, 1, MANY, 0, |
2572 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2573 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2574 | value, that value may be a function or a list of functions to be | |
2575 | called to run the hook. If the value is a function, it is called with | |
2576 | the given arguments and its return value is returned. | |
2577 | If it is a list of functions, those functions are called, in order, | |
2578 | with the given arguments ARGS, until one of them | |
9dbc9081 | 2579 | returns a non-nil value. Then we return that value. |
d5e2c90c | 2580 | However, if they all return nil, we return nil. |
9dbc9081 | 2581 | |
72e85d5d RS |
2582 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2583 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2584 | usage: (run-hook-with-args-until-success HOOK &rest ARGS) */) |
2585 | (nargs, args) | |
b0b667cb KH |
2586 | int nargs; |
2587 | Lisp_Object *args; | |
2588 | { | |
ff936e53 SM |
2589 | return run_hook_with_args (nargs, args, until_success); |
2590 | } | |
2591 | ||
a0d76c27 | 2592 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
9dbc9081 PJ |
2593 | Srun_hook_with_args_until_failure, 1, MANY, 0, |
2594 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2595 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2596 | value, that value may be a function or a list of functions to be | |
2597 | called to run the hook. If the value is a function, it is called with | |
2598 | the given arguments and its return value is returned. | |
2599 | If it is a list of functions, those functions are called, in order, | |
2600 | with the given arguments ARGS, until one of them returns nil. | |
2601 | Then we return nil. However, if they all return non-nil, we return non-nil. | |
9dbc9081 | 2602 | |
72e85d5d RS |
2603 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2604 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2605 | usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */) |
2606 | (nargs, args) | |
ff936e53 SM |
2607 | int nargs; |
2608 | Lisp_Object *args; | |
2609 | { | |
2610 | return run_hook_with_args (nargs, args, until_failure); | |
2611 | } | |
2612 | ||
c933ea05 RS |
2613 | /* ARGS[0] should be a hook symbol. |
2614 | Call each of the functions in the hook value, passing each of them | |
2615 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2616 | COND specifies a condition to test after each call | |
2617 | to decide whether to stop. | |
2618 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2619 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2620 | ||
2901f1d1 | 2621 | static Lisp_Object |
ff936e53 SM |
2622 | run_hook_with_args (nargs, args, cond) |
2623 | int nargs; | |
2624 | Lisp_Object *args; | |
2625 | enum run_hooks_condition cond; | |
2626 | { | |
2627 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2628 | Lisp_Object globals; |
2629 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2630 | |
f029ca5f RS |
2631 | /* If we are dying or still initializing, |
2632 | don't do anything--it would probably crash if we tried. */ | |
2633 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2634 | return Qnil; |
f029ca5f | 2635 | |
b0b667cb | 2636 | sym = args[0]; |
aa681b51 | 2637 | val = find_symbol_value (sym); |
ff936e53 SM |
2638 | ret = (cond == until_failure ? Qt : Qnil); |
2639 | ||
b0b667cb | 2640 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2641 | return ret; |
03699b14 | 2642 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2643 | { |
2644 | args[0] = val; | |
2645 | return Ffuncall (nargs, args); | |
2646 | } | |
2647 | else | |
2648 | { | |
fada05d6 KH |
2649 | globals = Qnil; |
2650 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2651 | |
ff936e53 SM |
2652 | for (; |
2653 | CONSP (val) && ((cond == to_completion) | |
2654 | || (cond == until_success ? NILP (ret) | |
2655 | : !NILP (ret))); | |
03699b14 | 2656 | val = XCDR (val)) |
b0b667cb | 2657 | { |
03699b14 | 2658 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2659 | { |
2660 | /* t indicates this hook has a local binding; | |
2661 | it means to run the global binding too. */ | |
b0b667cb | 2662 | |
ff936e53 SM |
2663 | for (globals = Fdefault_value (sym); |
2664 | CONSP (globals) && ((cond == to_completion) | |
2665 | || (cond == until_success ? NILP (ret) | |
2666 | : !NILP (ret))); | |
03699b14 | 2667 | globals = XCDR (globals)) |
b0b667cb | 2668 | { |
03699b14 | 2669 | args[0] = XCAR (globals); |
77d92e05 RS |
2670 | /* In a global value, t should not occur. If it does, we |
2671 | must ignore it to avoid an endless loop. */ | |
2672 | if (!EQ (args[0], Qt)) | |
2673 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2674 | } |
2675 | } | |
2676 | else | |
2677 | { | |
03699b14 | 2678 | args[0] = XCAR (val); |
ff936e53 | 2679 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2680 | } |
2681 | } | |
cb9d21f8 RS |
2682 | |
2683 | UNGCPRO; | |
ff936e53 | 2684 | return ret; |
b0b667cb KH |
2685 | } |
2686 | } | |
c933ea05 RS |
2687 | |
2688 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2689 | present value of that symbol. | |
2690 | Call each element of FUNLIST, | |
2691 | passing each of them the rest of ARGS. | |
2692 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2693 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2694 | ||
2695 | Lisp_Object | |
2696 | run_hook_list_with_args (funlist, nargs, args) | |
2697 | Lisp_Object funlist; | |
2698 | int nargs; | |
2699 | Lisp_Object *args; | |
2700 | { | |
2701 | Lisp_Object sym; | |
2702 | Lisp_Object val; | |
fada05d6 KH |
2703 | Lisp_Object globals; |
2704 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2705 | |
2706 | sym = args[0]; | |
fada05d6 KH |
2707 | globals = Qnil; |
2708 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2709 | |
03699b14 | 2710 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2711 | { |
03699b14 | 2712 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2713 | { |
2714 | /* t indicates this hook has a local binding; | |
2715 | it means to run the global binding too. */ | |
c933ea05 RS |
2716 | |
2717 | for (globals = Fdefault_value (sym); | |
2718 | CONSP (globals); | |
03699b14 | 2719 | globals = XCDR (globals)) |
c933ea05 | 2720 | { |
03699b14 | 2721 | args[0] = XCAR (globals); |
77d92e05 RS |
2722 | /* In a global value, t should not occur. If it does, we |
2723 | must ignore it to avoid an endless loop. */ | |
2724 | if (!EQ (args[0], Qt)) | |
2725 | Ffuncall (nargs, args); | |
c933ea05 RS |
2726 | } |
2727 | } | |
2728 | else | |
2729 | { | |
03699b14 | 2730 | args[0] = XCAR (val); |
c933ea05 RS |
2731 | Ffuncall (nargs, args); |
2732 | } | |
2733 | } | |
2734 | UNGCPRO; | |
2735 | return Qnil; | |
2736 | } | |
7d48558f RS |
2737 | |
2738 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2739 | ||
2740 | void | |
2741 | run_hook_with_args_2 (hook, arg1, arg2) | |
2742 | Lisp_Object hook, arg1, arg2; | |
2743 | { | |
2744 | Lisp_Object temp[3]; | |
2745 | temp[0] = hook; | |
2746 | temp[1] = arg1; | |
2747 | temp[2] = arg2; | |
2748 | ||
2749 | Frun_hook_with_args (3, temp); | |
2750 | } | |
ff936e53 | 2751 | \f |
db9f0278 JB |
2752 | /* Apply fn to arg */ |
2753 | Lisp_Object | |
2754 | apply1 (fn, arg) | |
2755 | Lisp_Object fn, arg; | |
2756 | { | |
a6e3fa71 JB |
2757 | struct gcpro gcpro1; |
2758 | ||
2759 | GCPRO1 (fn); | |
265a9e55 | 2760 | if (NILP (arg)) |
a6e3fa71 JB |
2761 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2762 | gcpro1.nvars = 2; | |
db9f0278 JB |
2763 | #ifdef NO_ARG_ARRAY |
2764 | { | |
2765 | Lisp_Object args[2]; | |
2766 | args[0] = fn; | |
2767 | args[1] = arg; | |
a6e3fa71 JB |
2768 | gcpro1.var = args; |
2769 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2770 | } |
2771 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2772 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2773 | #endif /* not NO_ARG_ARRAY */ |
2774 | } | |
2775 | ||
2776 | /* Call function fn on no arguments */ | |
2777 | Lisp_Object | |
2778 | call0 (fn) | |
2779 | Lisp_Object fn; | |
2780 | { | |
a6e3fa71 JB |
2781 | struct gcpro gcpro1; |
2782 | ||
2783 | GCPRO1 (fn); | |
2784 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2785 | } |
2786 | ||
15285f9f | 2787 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2788 | /* ARGSUSED */ |
2789 | Lisp_Object | |
15285f9f RS |
2790 | call1 (fn, arg1) |
2791 | Lisp_Object fn, arg1; | |
db9f0278 | 2792 | { |
a6e3fa71 | 2793 | struct gcpro gcpro1; |
db9f0278 | 2794 | #ifdef NO_ARG_ARRAY |
177c0ea7 | 2795 | Lisp_Object args[2]; |
a6e3fa71 | 2796 | |
db9f0278 | 2797 | args[0] = fn; |
15285f9f | 2798 | args[1] = arg1; |
a6e3fa71 JB |
2799 | GCPRO1 (args[0]); |
2800 | gcpro1.nvars = 2; | |
2801 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2802 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2803 | GCPRO1 (fn); |
2804 | gcpro1.nvars = 2; | |
2805 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2806 | #endif /* not NO_ARG_ARRAY */ |
2807 | } | |
2808 | ||
15285f9f | 2809 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2810 | /* ARGSUSED */ |
2811 | Lisp_Object | |
15285f9f RS |
2812 | call2 (fn, arg1, arg2) |
2813 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2814 | { |
a6e3fa71 | 2815 | struct gcpro gcpro1; |
db9f0278 JB |
2816 | #ifdef NO_ARG_ARRAY |
2817 | Lisp_Object args[3]; | |
2818 | args[0] = fn; | |
15285f9f RS |
2819 | args[1] = arg1; |
2820 | args[2] = arg2; | |
a6e3fa71 JB |
2821 | GCPRO1 (args[0]); |
2822 | gcpro1.nvars = 3; | |
2823 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2824 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2825 | GCPRO1 (fn); |
2826 | gcpro1.nvars = 3; | |
2827 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2828 | #endif /* not NO_ARG_ARRAY */ |
2829 | } | |
2830 | ||
15285f9f | 2831 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2832 | /* ARGSUSED */ |
2833 | Lisp_Object | |
15285f9f RS |
2834 | call3 (fn, arg1, arg2, arg3) |
2835 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2836 | { |
a6e3fa71 | 2837 | struct gcpro gcpro1; |
db9f0278 JB |
2838 | #ifdef NO_ARG_ARRAY |
2839 | Lisp_Object args[4]; | |
2840 | args[0] = fn; | |
15285f9f RS |
2841 | args[1] = arg1; |
2842 | args[2] = arg2; | |
2843 | args[3] = arg3; | |
a6e3fa71 JB |
2844 | GCPRO1 (args[0]); |
2845 | gcpro1.nvars = 4; | |
2846 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2847 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2848 | GCPRO1 (fn); |
2849 | gcpro1.nvars = 4; | |
2850 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2851 | #endif /* not NO_ARG_ARRAY */ |
2852 | } | |
2853 | ||
15285f9f | 2854 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2855 | /* ARGSUSED */ |
2856 | Lisp_Object | |
15285f9f RS |
2857 | call4 (fn, arg1, arg2, arg3, arg4) |
2858 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2859 | { |
2860 | struct gcpro gcpro1; | |
2861 | #ifdef NO_ARG_ARRAY | |
2862 | Lisp_Object args[5]; | |
2863 | args[0] = fn; | |
15285f9f RS |
2864 | args[1] = arg1; |
2865 | args[2] = arg2; | |
2866 | args[3] = arg3; | |
2867 | args[4] = arg4; | |
a5a44b91 JB |
2868 | GCPRO1 (args[0]); |
2869 | gcpro1.nvars = 5; | |
2870 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2871 | #else /* not NO_ARG_ARRAY */ | |
2872 | GCPRO1 (fn); | |
2873 | gcpro1.nvars = 5; | |
2874 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2875 | #endif /* not NO_ARG_ARRAY */ | |
2876 | } | |
2877 | ||
15285f9f RS |
2878 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2879 | /* ARGSUSED */ | |
2880 | Lisp_Object | |
2881 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2882 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2883 | { | |
2884 | struct gcpro gcpro1; | |
2885 | #ifdef NO_ARG_ARRAY | |
2886 | Lisp_Object args[6]; | |
2887 | args[0] = fn; | |
2888 | args[1] = arg1; | |
2889 | args[2] = arg2; | |
2890 | args[3] = arg3; | |
2891 | args[4] = arg4; | |
2892 | args[5] = arg5; | |
2893 | GCPRO1 (args[0]); | |
2894 | gcpro1.nvars = 6; | |
2895 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2896 | #else /* not NO_ARG_ARRAY */ | |
2897 | GCPRO1 (fn); | |
2898 | gcpro1.nvars = 6; | |
2899 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2900 | #endif /* not NO_ARG_ARRAY */ | |
2901 | } | |
2902 | ||
2903 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2904 | /* ARGSUSED */ | |
2905 | Lisp_Object | |
2906 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2907 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2908 | { | |
2909 | struct gcpro gcpro1; | |
2910 | #ifdef NO_ARG_ARRAY | |
2911 | Lisp_Object args[7]; | |
2912 | args[0] = fn; | |
2913 | args[1] = arg1; | |
2914 | args[2] = arg2; | |
2915 | args[3] = arg3; | |
2916 | args[4] = arg4; | |
2917 | args[5] = arg5; | |
2918 | args[6] = arg6; | |
2919 | GCPRO1 (args[0]); | |
2920 | gcpro1.nvars = 7; | |
2921 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2922 | #else /* not NO_ARG_ARRAY */ | |
2923 | GCPRO1 (fn); | |
2924 | gcpro1.nvars = 7; | |
2925 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2926 | #endif /* not NO_ARG_ARRAY */ | |
2927 | } | |
2928 | ||
6c2ef893 RS |
2929 | /* The caller should GCPRO all the elements of ARGS. */ |
2930 | ||
db9f0278 | 2931 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
9dbc9081 PJ |
2932 | doc: /* Call first argument as a function, passing remaining arguments to it. |
2933 | Return the value that function returns. | |
2934 | Thus, (funcall 'cons 'x 'y) returns (x . y). | |
2935 | usage: (funcall FUNCTION &rest ARGUMENTS) */) | |
2936 | (nargs, args) | |
db9f0278 JB |
2937 | int nargs; |
2938 | Lisp_Object *args; | |
2939 | { | |
8788120f | 2940 | Lisp_Object fun, original_fun; |
db9f0278 JB |
2941 | Lisp_Object funcar; |
2942 | int numargs = nargs - 1; | |
2943 | Lisp_Object lisp_numargs; | |
2944 | Lisp_Object val; | |
2945 | struct backtrace backtrace; | |
2946 | register Lisp_Object *internal_args; | |
2947 | register int i; | |
2948 | ||
2949 | QUIT; | |
ee830945 RS |
2950 | if ((consing_since_gc > gc_cons_threshold |
2951 | && consing_since_gc > gc_relative_threshold) | |
2952 | || | |
2953 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
a6e3fa71 | 2954 | Fgarbage_collect (); |
db9f0278 JB |
2955 | |
2956 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2957 | { | |
2958 | if (max_lisp_eval_depth < 100) | |
2959 | max_lisp_eval_depth = 100; | |
2960 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2961 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2962 | } |
2963 | ||
2964 | backtrace.next = backtrace_list; | |
2965 | backtrace_list = &backtrace; | |
2966 | backtrace.function = &args[0]; | |
2967 | backtrace.args = &args[1]; | |
2968 | backtrace.nargs = nargs - 1; | |
2969 | backtrace.evalargs = 0; | |
2970 | backtrace.debug_on_exit = 0; | |
2971 | ||
2972 | if (debug_on_next_call) | |
2973 | do_debug_on_call (Qlambda); | |
2974 | ||
fff3ff9c KS |
2975 | CHECK_CONS_LIST (); |
2976 | ||
8788120f KS |
2977 | original_fun = args[0]; |
2978 | ||
db9f0278 JB |
2979 | retry: |
2980 | ||
8788120f KS |
2981 | /* Optimize for no indirection. */ |
2982 | fun = original_fun; | |
2983 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2984 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2985 | fun = indirect_function (fun); | |
db9f0278 | 2986 | |
90165123 | 2987 | if (SUBRP (fun)) |
db9f0278 | 2988 | { |
fff3ff9c | 2989 | if (numargs < XSUBR (fun)->min_args |
db9f0278 JB |
2990 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) |
2991 | { | |
a631e24c | 2992 | XSETFASTINT (lisp_numargs, numargs); |
734d55a2 | 2993 | xsignal2 (Qwrong_number_of_arguments, original_fun, lisp_numargs); |
db9f0278 JB |
2994 | } |
2995 | ||
2996 | if (XSUBR (fun)->max_args == UNEVALLED) | |
734d55a2 | 2997 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2998 | |
2999 | if (XSUBR (fun)->max_args == MANY) | |
3000 | { | |
3001 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
3002 | goto done; | |
3003 | } | |
3004 | ||
3005 | if (XSUBR (fun)->max_args > numargs) | |
3006 | { | |
3007 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
3008 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
3009 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
3010 | internal_args[i] = Qnil; | |
3011 | } | |
3012 | else | |
3013 | internal_args = args + 1; | |
3014 | switch (XSUBR (fun)->max_args) | |
3015 | { | |
3016 | case 0: | |
3017 | val = (*XSUBR (fun)->function) (); | |
3018 | goto done; | |
3019 | case 1: | |
3020 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
3021 | goto done; | |
3022 | case 2: | |
82fc29a1 | 3023 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1]); |
db9f0278 JB |
3024 | goto done; |
3025 | case 3: | |
3026 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3027 | internal_args[2]); | |
3028 | goto done; | |
3029 | case 4: | |
3030 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
82fc29a1 | 3031 | internal_args[2], internal_args[3]); |
db9f0278 JB |
3032 | goto done; |
3033 | case 5: | |
3034 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3035 | internal_args[2], internal_args[3], | |
3036 | internal_args[4]); | |
3037 | goto done; | |
3038 | case 6: | |
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 | goto done; | |
15c65264 RS |
3043 | case 7: |
3044 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3045 | internal_args[2], internal_args[3], | |
3046 | internal_args[4], internal_args[5], | |
3047 | internal_args[6]); | |
3048 | goto done; | |
db9f0278 | 3049 | |
166c822d KH |
3050 | case 8: |
3051 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3052 | internal_args[2], internal_args[3], | |
3053 | internal_args[4], internal_args[5], | |
3054 | internal_args[6], internal_args[7]); | |
3055 | goto done; | |
3056 | ||
db9f0278 | 3057 | default: |
70ee42f7 | 3058 | |
166c822d | 3059 | /* If a subr takes more than 8 arguments without using MANY |
177c0ea7 | 3060 | or UNEVALLED, we need to extend this function to support it. |
70ee42f7 JB |
3061 | Until this is done, there is no way to call the function. */ |
3062 | abort (); | |
db9f0278 JB |
3063 | } |
3064 | } | |
90165123 | 3065 | if (COMPILEDP (fun)) |
db9f0278 JB |
3066 | val = funcall_lambda (fun, numargs, args + 1); |
3067 | else | |
3068 | { | |
8788120f | 3069 | if (EQ (fun, Qunbound)) |
734d55a2 | 3070 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 3071 | if (!CONSP (fun)) |
734d55a2 KS |
3072 | xsignal1 (Qinvalid_function, original_fun); |
3073 | funcar = XCAR (fun); | |
90165123 | 3074 | if (!SYMBOLP (funcar)) |
734d55a2 | 3075 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3076 | if (EQ (funcar, Qlambda)) |
3077 | val = funcall_lambda (fun, numargs, args + 1); | |
db9f0278 JB |
3078 | else if (EQ (funcar, Qautoload)) |
3079 | { | |
8788120f | 3080 | do_autoload (fun, original_fun); |
fff3ff9c | 3081 | CHECK_CONS_LIST (); |
db9f0278 JB |
3082 | goto retry; |
3083 | } | |
3084 | else | |
734d55a2 | 3085 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3086 | } |
3087 | done: | |
c1788fbc | 3088 | CHECK_CONS_LIST (); |
db9f0278 JB |
3089 | lisp_eval_depth--; |
3090 | if (backtrace.debug_on_exit) | |
3091 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
3092 | backtrace_list = backtrace.next; | |
3093 | return val; | |
3094 | } | |
3095 | \f | |
3096 | Lisp_Object | |
3097 | apply_lambda (fun, args, eval_flag) | |
3098 | Lisp_Object fun, args; | |
3099 | int eval_flag; | |
3100 | { | |
3101 | Lisp_Object args_left; | |
3102 | Lisp_Object numargs; | |
3103 | register Lisp_Object *arg_vector; | |
3104 | struct gcpro gcpro1, gcpro2, gcpro3; | |
3105 | register int i; | |
3106 | register Lisp_Object tem; | |
3107 | ||
3108 | numargs = Flength (args); | |
3109 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
3110 | args_left = args; | |
3111 | ||
3112 | GCPRO3 (*arg_vector, args_left, fun); | |
3113 | gcpro1.nvars = 0; | |
3114 | ||
3115 | for (i = 0; i < XINT (numargs);) | |
3116 | { | |
3117 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
3118 | if (eval_flag) tem = Feval (tem); | |
3119 | arg_vector[i++] = tem; | |
3120 | gcpro1.nvars = i; | |
3121 | } | |
3122 | ||
3123 | UNGCPRO; | |
3124 | ||
3125 | if (eval_flag) | |
3126 | { | |
3127 | backtrace_list->args = arg_vector; | |
3128 | backtrace_list->nargs = i; | |
3129 | } | |
3130 | backtrace_list->evalargs = 0; | |
3131 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
3132 | ||
3133 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
3134 | if (backtrace_list->debug_on_exit) | |
3135 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
3136 | /* Don't do it again when we return to eval. */ | |
3137 | backtrace_list->debug_on_exit = 0; | |
3138 | return tem; | |
3139 | } | |
3140 | ||
3141 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
3142 | and return the result of evaluation. | |
3143 | FUN must be either a lambda-expression or a compiled-code object. */ | |
3144 | ||
2901f1d1 | 3145 | static Lisp_Object |
db9f0278 JB |
3146 | funcall_lambda (fun, nargs, arg_vector) |
3147 | Lisp_Object fun; | |
3148 | int nargs; | |
3149 | register Lisp_Object *arg_vector; | |
3150 | { | |
9ab90667 | 3151 | Lisp_Object val, syms_left, next; |
aed13378 | 3152 | int count = SPECPDL_INDEX (); |
9ab90667 | 3153 | int i, optional, rest; |
db9f0278 | 3154 | |
90165123 | 3155 | if (CONSP (fun)) |
9ab90667 GM |
3156 | { |
3157 | syms_left = XCDR (fun); | |
3158 | if (CONSP (syms_left)) | |
3159 | syms_left = XCAR (syms_left); | |
3160 | else | |
734d55a2 | 3161 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3162 | } |
90165123 | 3163 | else if (COMPILEDP (fun)) |
845975f5 | 3164 | syms_left = AREF (fun, COMPILED_ARGLIST); |
9ab90667 GM |
3165 | else |
3166 | abort (); | |
db9f0278 | 3167 | |
9ab90667 GM |
3168 | i = optional = rest = 0; |
3169 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
3170 | { |
3171 | QUIT; | |
177c0ea7 | 3172 | |
9ab90667 | 3173 | next = XCAR (syms_left); |
8788120f | 3174 | if (!SYMBOLP (next)) |
734d55a2 | 3175 | xsignal1 (Qinvalid_function, fun); |
177c0ea7 | 3176 | |
db9f0278 JB |
3177 | if (EQ (next, Qand_rest)) |
3178 | rest = 1; | |
3179 | else if (EQ (next, Qand_optional)) | |
3180 | optional = 1; | |
3181 | else if (rest) | |
3182 | { | |
9ffa21d4 | 3183 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
3184 | i = nargs; |
3185 | } | |
3186 | else if (i < nargs) | |
9ab90667 | 3187 | specbind (next, arg_vector[i++]); |
db9f0278 | 3188 | else if (!optional) |
734d55a2 | 3189 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 JB |
3190 | else |
3191 | specbind (next, Qnil); | |
3192 | } | |
3193 | ||
9ab90667 | 3194 | if (!NILP (syms_left)) |
734d55a2 | 3195 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3196 | else if (i < nargs) |
734d55a2 | 3197 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 | 3198 | |
90165123 | 3199 | if (CONSP (fun)) |
9ab90667 | 3200 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 3201 | else |
ca248607 RS |
3202 | { |
3203 | /* If we have not actually read the bytecode string | |
3204 | and constants vector yet, fetch them from the file. */ | |
845975f5 | 3205 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) |
661c7d6e | 3206 | Ffetch_bytecode (fun); |
845975f5 SM |
3207 | val = Fbyte_code (AREF (fun, COMPILED_BYTECODE), |
3208 | AREF (fun, COMPILED_CONSTANTS), | |
3209 | AREF (fun, COMPILED_STACK_DEPTH)); | |
ca248607 | 3210 | } |
177c0ea7 | 3211 | |
db9f0278 JB |
3212 | return unbind_to (count, val); |
3213 | } | |
661c7d6e KH |
3214 | |
3215 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
9dbc9081 PJ |
3216 | 1, 1, 0, |
3217 | doc: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */) | |
3218 | (object) | |
661c7d6e KH |
3219 | Lisp_Object object; |
3220 | { | |
3221 | Lisp_Object tem; | |
3222 | ||
845975f5 | 3223 | if (COMPILEDP (object) && CONSP (AREF (object, COMPILED_BYTECODE))) |
661c7d6e | 3224 | { |
845975f5 | 3225 | tem = read_doc_string (AREF (object, COMPILED_BYTECODE)); |
5bbdb090 | 3226 | if (!CONSP (tem)) |
845975f5 SM |
3227 | { |
3228 | tem = AREF (object, COMPILED_BYTECODE); | |
3229 | if (CONSP (tem) && STRINGP (XCAR (tem))) | |
d5db4077 | 3230 | error ("Invalid byte code in %s", SDATA (XCAR (tem))); |
845975f5 SM |
3231 | else |
3232 | error ("Invalid byte code"); | |
3233 | } | |
3234 | AREF (object, COMPILED_BYTECODE) = XCAR (tem); | |
3235 | AREF (object, COMPILED_CONSTANTS) = XCDR (tem); | |
661c7d6e KH |
3236 | } |
3237 | return object; | |
3238 | } | |
db9f0278 JB |
3239 | \f |
3240 | void | |
3241 | grow_specpdl () | |
3242 | { | |
aed13378 | 3243 | register int count = SPECPDL_INDEX (); |
db9f0278 JB |
3244 | if (specpdl_size >= max_specpdl_size) |
3245 | { | |
3246 | if (max_specpdl_size < 400) | |
3247 | max_specpdl_size = 400; | |
3248 | if (specpdl_size >= max_specpdl_size) | |
734d55a2 | 3249 | signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil); |
db9f0278 JB |
3250 | } |
3251 | specpdl_size *= 2; | |
3252 | if (specpdl_size > max_specpdl_size) | |
3253 | specpdl_size = max_specpdl_size; | |
3254 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
3255 | specpdl_ptr = specpdl + count; | |
3256 | } | |
3257 | ||
3258 | void | |
3259 | specbind (symbol, value) | |
3260 | Lisp_Object symbol, value; | |
3261 | { | |
db9f0278 | 3262 | Lisp_Object ovalue; |
19cebf5a | 3263 | Lisp_Object valcontents; |
db9f0278 | 3264 | |
b7826503 | 3265 | CHECK_SYMBOL (symbol); |
db9f0278 JB |
3266 | if (specpdl_ptr == specpdl + specpdl_size) |
3267 | grow_specpdl (); | |
719177b3 | 3268 | |
19cebf5a GM |
3269 | /* The most common case is that of a non-constant symbol with a |
3270 | trivial value. Make that as fast as we can. */ | |
3271 | valcontents = SYMBOL_VALUE (symbol); | |
3272 | if (!MISCP (valcontents) && !SYMBOL_CONSTANT_P (symbol)) | |
719177b3 | 3273 | { |
9ab90667 | 3274 | specpdl_ptr->symbol = symbol; |
19cebf5a | 3275 | specpdl_ptr->old_value = valcontents; |
9ab90667 GM |
3276 | specpdl_ptr->func = NULL; |
3277 | ++specpdl_ptr; | |
19cebf5a | 3278 | SET_SYMBOL_VALUE (symbol, value); |
719177b3 RS |
3279 | } |
3280 | else | |
9ab90667 | 3281 | { |
eb700b82 | 3282 | Lisp_Object valcontents; |
177c0ea7 | 3283 | |
9ab90667 GM |
3284 | ovalue = find_symbol_value (symbol); |
3285 | specpdl_ptr->func = 0; | |
3286 | specpdl_ptr->old_value = ovalue; | |
719177b3 | 3287 | |
eb700b82 GM |
3288 | valcontents = XSYMBOL (symbol)->value; |
3289 | ||
3290 | if (BUFFER_LOCAL_VALUEP (valcontents) | |
3291 | || SOME_BUFFER_LOCAL_VALUEP (valcontents) | |
3292 | || BUFFER_OBJFWDP (valcontents)) | |
9ab90667 | 3293 | { |
0967b4b0 GM |
3294 | Lisp_Object where, current_buffer; |
3295 | ||
3296 | current_buffer = Fcurrent_buffer (); | |
177c0ea7 | 3297 | |
9ab90667 | 3298 | /* For a local variable, record both the symbol and which |
eb700b82 GM |
3299 | buffer's or frame's value we are saving. */ |
3300 | if (!NILP (Flocal_variable_p (symbol, Qnil))) | |
0967b4b0 | 3301 | where = current_buffer; |
eb700b82 GM |
3302 | else if (!BUFFER_OBJFWDP (valcontents) |
3303 | && XBUFFER_LOCAL_VALUE (valcontents)->found_for_frame) | |
3304 | where = XBUFFER_LOCAL_VALUE (valcontents)->frame; | |
3305 | else | |
3306 | where = Qnil; | |
3307 | ||
3308 | /* We're not using the `unused' slot in the specbinding | |
3309 | structure because this would mean we have to do more | |
3310 | work for simple variables. */ | |
0967b4b0 | 3311 | specpdl_ptr->symbol = Fcons (symbol, Fcons (where, current_buffer)); |
06bccf8e GM |
3312 | |
3313 | /* If SYMBOL is a per-buffer variable which doesn't have a | |
3314 | buffer-local value here, make the `let' change the global | |
3315 | value by changing the value of SYMBOL in all buffers not | |
3316 | having their own value. This is consistent with what | |
3317 | happens with other buffer-local variables. */ | |
eb700b82 GM |
3318 | if (NILP (where) |
3319 | && BUFFER_OBJFWDP (valcontents)) | |
06bccf8e GM |
3320 | { |
3321 | ++specpdl_ptr; | |
3322 | Fset_default (symbol, value); | |
3323 | return; | |
3324 | } | |
9ab90667 GM |
3325 | } |
3326 | else | |
3327 | specpdl_ptr->symbol = symbol; | |
3328 | ||
3329 | specpdl_ptr++; | |
3330 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) | |
eae0e123 | 3331 | store_symval_forwarding (symbol, ovalue, value, NULL); |
9ab90667 GM |
3332 | else |
3333 | set_internal (symbol, value, 0, 1); | |
3334 | } | |
db9f0278 JB |
3335 | } |
3336 | ||
3337 | void | |
3338 | record_unwind_protect (function, arg) | |
1d159538 | 3339 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
3340 | Lisp_Object arg; |
3341 | { | |
9ba8e10d CY |
3342 | eassert (!handling_signal); |
3343 | ||
db9f0278 JB |
3344 | if (specpdl_ptr == specpdl + specpdl_size) |
3345 | grow_specpdl (); | |
3346 | specpdl_ptr->func = function; | |
3347 | specpdl_ptr->symbol = Qnil; | |
3348 | specpdl_ptr->old_value = arg; | |
3349 | specpdl_ptr++; | |
3350 | } | |
3351 | ||
3352 | Lisp_Object | |
3353 | unbind_to (count, value) | |
3354 | int count; | |
3355 | Lisp_Object value; | |
3356 | { | |
5a073f50 KS |
3357 | Lisp_Object quitf = Vquit_flag; |
3358 | struct gcpro gcpro1, gcpro2; | |
db9f0278 | 3359 | |
5a073f50 | 3360 | GCPRO2 (value, quitf); |
db9f0278 JB |
3361 | Vquit_flag = Qnil; |
3362 | ||
3363 | while (specpdl_ptr != specpdl + count) | |
3364 | { | |
611a8f8c RS |
3365 | /* Copy the binding, and decrement specpdl_ptr, before we do |
3366 | the work to unbind it. We decrement first | |
3367 | so that an error in unbinding won't try to unbind | |
3368 | the same entry again, and we copy the binding first | |
3369 | in case more bindings are made during some of the code we run. */ | |
eb700b82 | 3370 | |
45f266dc DL |
3371 | struct specbinding this_binding; |
3372 | this_binding = *--specpdl_ptr; | |
611a8f8c RS |
3373 | |
3374 | if (this_binding.func != 0) | |
3375 | (*this_binding.func) (this_binding.old_value); | |
0967b4b0 GM |
3376 | /* If the symbol is a list, it is really (SYMBOL WHERE |
3377 | . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a | |
3378 | frame. If WHERE is a buffer or frame, this indicates we | |
1b1acc13 PJ |
3379 | bound a variable that had a buffer-local or frame-local |
3380 | binding. WHERE nil means that the variable had the default | |
0967b4b0 GM |
3381 | value when it was bound. CURRENT-BUFFER is the buffer that |
3382 | was current when the variable was bound. */ | |
611a8f8c | 3383 | else if (CONSP (this_binding.symbol)) |
719177b3 | 3384 | { |
eb700b82 | 3385 | Lisp_Object symbol, where; |
719177b3 | 3386 | |
611a8f8c RS |
3387 | symbol = XCAR (this_binding.symbol); |
3388 | where = XCAR (XCDR (this_binding.symbol)); | |
719177b3 | 3389 | |
eb700b82 | 3390 | if (NILP (where)) |
611a8f8c | 3391 | Fset_default (symbol, this_binding.old_value); |
eb700b82 | 3392 | else if (BUFFERP (where)) |
611a8f8c | 3393 | set_internal (symbol, this_binding.old_value, XBUFFER (where), 1); |
177c0ea7 | 3394 | else |
611a8f8c | 3395 | set_internal (symbol, this_binding.old_value, NULL, 1); |
719177b3 | 3396 | } |
db9f0278 | 3397 | else |
9ab90667 GM |
3398 | { |
3399 | /* If variable has a trivial value (no forwarding), we can | |
3400 | just set it. No need to check for constant symbols here, | |
3401 | since that was already done by specbind. */ | |
611a8f8c RS |
3402 | if (!MISCP (SYMBOL_VALUE (this_binding.symbol))) |
3403 | SET_SYMBOL_VALUE (this_binding.symbol, this_binding.old_value); | |
9ab90667 | 3404 | else |
611a8f8c | 3405 | set_internal (this_binding.symbol, this_binding.old_value, 0, 1); |
9ab90667 | 3406 | } |
db9f0278 | 3407 | } |
177c0ea7 | 3408 | |
5a073f50 KS |
3409 | if (NILP (Vquit_flag) && !NILP (quitf)) |
3410 | Vquit_flag = quitf; | |
db9f0278 JB |
3411 | |
3412 | UNGCPRO; | |
db9f0278 JB |
3413 | return value; |
3414 | } | |
3415 | \f | |
db9f0278 | 3416 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, |
9dbc9081 PJ |
3417 | doc: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. |
3418 | The debugger is entered when that frame exits, if the flag is non-nil. */) | |
3419 | (level, flag) | |
db9f0278 JB |
3420 | Lisp_Object level, flag; |
3421 | { | |
3422 | register struct backtrace *backlist = backtrace_list; | |
3423 | register int i; | |
3424 | ||
b7826503 | 3425 | CHECK_NUMBER (level); |
db9f0278 JB |
3426 | |
3427 | for (i = 0; backlist && i < XINT (level); i++) | |
3428 | { | |
3429 | backlist = backlist->next; | |
3430 | } | |
3431 | ||
3432 | if (backlist) | |
265a9e55 | 3433 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
3434 | |
3435 | return flag; | |
3436 | } | |
3437 | ||
3438 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
9dbc9081 PJ |
3439 | doc: /* Print a trace of Lisp function calls currently active. |
3440 | Output stream used is value of `standard-output'. */) | |
3441 | () | |
db9f0278 JB |
3442 | { |
3443 | register struct backtrace *backlist = backtrace_list; | |
3444 | register int i; | |
3445 | Lisp_Object tail; | |
3446 | Lisp_Object tem; | |
3447 | extern Lisp_Object Vprint_level; | |
3448 | struct gcpro gcpro1; | |
3449 | ||
a631e24c | 3450 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
3451 | |
3452 | tail = Qnil; | |
3453 | GCPRO1 (tail); | |
3454 | ||
3455 | while (backlist) | |
3456 | { | |
3457 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
3458 | if (backlist->nargs == UNEVALLED) | |
3459 | { | |
3460 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 3461 | write_string ("\n", -1); |
db9f0278 JB |
3462 | } |
3463 | else | |
3464 | { | |
3465 | tem = *backlist->function; | |
3466 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
3467 | write_string ("(", -1); | |
3468 | if (backlist->nargs == MANY) | |
3469 | { | |
3470 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 3471 | !NILP (tail); |
db9f0278 JB |
3472 | tail = Fcdr (tail), i++) |
3473 | { | |
3474 | if (i) write_string (" ", -1); | |
3475 | Fprin1 (Fcar (tail), Qnil); | |
3476 | } | |
3477 | } | |
3478 | else | |
3479 | { | |
3480 | for (i = 0; i < backlist->nargs; i++) | |
3481 | { | |
3482 | if (i) write_string (" ", -1); | |
3483 | Fprin1 (backlist->args[i], Qnil); | |
3484 | } | |
3485 | } | |
b6703b02 | 3486 | write_string (")\n", -1); |
db9f0278 | 3487 | } |
db9f0278 JB |
3488 | backlist = backlist->next; |
3489 | } | |
3490 | ||
3491 | Vprint_level = Qnil; | |
3492 | UNGCPRO; | |
3493 | return Qnil; | |
3494 | } | |
3495 | ||
17401c97 | 3496 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
9dbc9081 PJ |
3497 | doc: /* Return the function and arguments NFRAMES up from current execution point. |
3498 | If that frame has not evaluated the arguments yet (or is a special form), | |
3499 | the value is (nil FUNCTION ARG-FORMS...). | |
3500 | If that frame has evaluated its arguments and called its function already, | |
3501 | the value is (t FUNCTION ARG-VALUES...). | |
3502 | A &rest arg is represented as the tail of the list ARG-VALUES. | |
3503 | FUNCTION is whatever was supplied as car of evaluated list, | |
3504 | or a lambda expression for macro calls. | |
3505 | If NFRAMES is more than the number of frames, the value is nil. */) | |
3506 | (nframes) | |
db9f0278 JB |
3507 | Lisp_Object nframes; |
3508 | { | |
3509 | register struct backtrace *backlist = backtrace_list; | |
3510 | register int i; | |
3511 | Lisp_Object tem; | |
3512 | ||
b7826503 | 3513 | CHECK_NATNUM (nframes); |
db9f0278 JB |
3514 | |
3515 | /* Find the frame requested. */ | |
b6703b02 | 3516 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
3517 | backlist = backlist->next; |
3518 | ||
3519 | if (!backlist) | |
3520 | return Qnil; | |
3521 | if (backlist->nargs == UNEVALLED) | |
3522 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
3523 | else | |
3524 | { | |
3525 | if (backlist->nargs == MANY) | |
3526 | tem = *backlist->args; | |
3527 | else | |
3528 | tem = Flist (backlist->nargs, backlist->args); | |
3529 | ||
3530 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3531 | } | |
3532 | } | |
a2ff3819 | 3533 | |
db9f0278 | 3534 | \f |
4ce0541e SM |
3535 | void |
3536 | mark_backtrace () | |
3537 | { | |
3538 | register struct backtrace *backlist; | |
3539 | register int i; | |
3540 | ||
3541 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
3542 | { | |
3543 | mark_object (*backlist->function); | |
3544 | ||
3545 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
3546 | i = 0; | |
3547 | else | |
3548 | i = backlist->nargs - 1; | |
3549 | for (; i >= 0; i--) | |
3550 | mark_object (backlist->args[i]); | |
3551 | } | |
3552 | } | |
3553 | ||
dfcf069d | 3554 | void |
db9f0278 JB |
3555 | syms_of_eval () |
3556 | { | |
3557 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
82fc29a1 | 3558 | doc: /* *Limit on number of Lisp variable bindings and `unwind-protect's. |
9f5903bb | 3559 | If Lisp code tries to increase the total number past this amount, |
2520dc0c RS |
3560 | an error is signaled. |
3561 | You can safely use a value considerably larger than the default value, | |
3562 | if that proves inconveniently small. However, if you increase it too far, | |
3563 | Emacs could run out of memory trying to make the stack bigger. */); | |
db9f0278 JB |
3564 | |
3565 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
9dbc9081 | 3566 | doc: /* *Limit on depth in `eval', `apply' and `funcall' before error. |
2520dc0c RS |
3567 | |
3568 | This limit serves to catch infinite recursions for you before they cause | |
9dbc9081 PJ |
3569 | actual stack overflow in C, which would be fatal for Emacs. |
3570 | You can safely make it considerably larger than its default value, | |
2520dc0c RS |
3571 | if that proves inconveniently small. However, if you increase it too far, |
3572 | Emacs could overflow the real C stack, and crash. */); | |
db9f0278 JB |
3573 | |
3574 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
9dbc9081 | 3575 | doc: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil. |
42ed718e RS |
3576 | If the value is t, that means do an ordinary quit. |
3577 | If the value equals `throw-on-input', that means quit by throwing | |
3578 | to the tag specified in `throw-on-input'; it's for handling `while-no-input'. | |
3579 | Typing C-g sets `quit-flag' to t, regardless of `inhibit-quit', | |
3580 | but `inhibit-quit' non-nil prevents anything from taking notice of that. */); | |
db9f0278 JB |
3581 | Vquit_flag = Qnil; |
3582 | ||
3583 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
9dbc9081 PJ |
3584 | doc: /* Non-nil inhibits C-g quitting from happening immediately. |
3585 | Note that `quit-flag' will still be set by typing C-g, | |
3586 | so a quit will be signaled as soon as `inhibit-quit' is nil. | |
3587 | To prevent this happening, set `quit-flag' to nil | |
3588 | before making `inhibit-quit' nil. */); | |
db9f0278 JB |
3589 | Vinhibit_quit = Qnil; |
3590 | ||
ad236261 JB |
3591 | Qinhibit_quit = intern ("inhibit-quit"); |
3592 | staticpro (&Qinhibit_quit); | |
3593 | ||
db9f0278 JB |
3594 | Qautoload = intern ("autoload"); |
3595 | staticpro (&Qautoload); | |
3596 | ||
3597 | Qdebug_on_error = intern ("debug-on-error"); | |
3598 | staticpro (&Qdebug_on_error); | |
3599 | ||
3600 | Qmacro = intern ("macro"); | |
3601 | staticpro (&Qmacro); | |
3602 | ||
d6edd563 GM |
3603 | Qdeclare = intern ("declare"); |
3604 | staticpro (&Qdeclare); | |
177c0ea7 | 3605 | |
db9f0278 JB |
3606 | /* Note that the process handling also uses Qexit, but we don't want |
3607 | to staticpro it twice, so we just do it here. */ | |
3608 | Qexit = intern ("exit"); | |
3609 | staticpro (&Qexit); | |
3610 | ||
3611 | Qinteractive = intern ("interactive"); | |
3612 | staticpro (&Qinteractive); | |
3613 | ||
3614 | Qcommandp = intern ("commandp"); | |
3615 | staticpro (&Qcommandp); | |
3616 | ||
3617 | Qdefun = intern ("defun"); | |
3618 | staticpro (&Qdefun); | |
3619 | ||
3620 | Qand_rest = intern ("&rest"); | |
3621 | staticpro (&Qand_rest); | |
3622 | ||
3623 | Qand_optional = intern ("&optional"); | |
3624 | staticpro (&Qand_optional); | |
3625 | ||
f01cbfdd RS |
3626 | Qdebug = intern ("debug"); |
3627 | staticpro (&Qdebug); | |
3628 | ||
128c0f66 | 3629 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
704788b3 RS |
3630 | doc: /* *Non-nil means errors display a backtrace buffer. |
3631 | More precisely, this happens for any error that is handled | |
3632 | by the editor command loop. | |
9dbc9081 PJ |
3633 | If the value is a list, an error only means to display a backtrace |
3634 | if one of its condition symbols appears in the list. */); | |
128c0f66 | 3635 | Vstack_trace_on_error = Qnil; |
db9f0278 | 3636 | |
128c0f66 | 3637 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
9dbc9081 PJ |
3638 | doc: /* *Non-nil means enter debugger if an error is signaled. |
3639 | Does not apply to errors handled by `condition-case' or those | |
3640 | matched by `debug-ignored-errors'. | |
3641 | If the value is a list, an error only means to enter the debugger | |
3642 | if one of its condition symbols appears in the list. | |
3643 | When you evaluate an expression interactively, this variable | |
3644 | is temporarily non-nil if `eval-expression-debug-on-error' is non-nil. | |
3645 | See also variable `debug-on-quit'. */); | |
128c0f66 | 3646 | Vdebug_on_error = Qnil; |
db9f0278 | 3647 | |
fc950e09 | 3648 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
9dbc9081 PJ |
3649 | doc: /* *List of errors for which the debugger should not be called. |
3650 | Each element may be a condition-name or a regexp that matches error messages. | |
3651 | If any element applies to a given error, that error skips the debugger | |
3652 | and just returns to top level. | |
3653 | This overrides the variable `debug-on-error'. | |
3654 | It does not apply to errors handled by `condition-case'. */); | |
fc950e09 KH |
3655 | Vdebug_ignored_errors = Qnil; |
3656 | ||
db9f0278 | 3657 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
82fc29a1 JB |
3658 | doc: /* *Non-nil means enter debugger if quit is signaled (C-g, for example). |
3659 | Does not apply if quit is handled by a `condition-case'. */); | |
db9f0278 JB |
3660 | debug_on_quit = 0; |
3661 | ||
3662 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
9dbc9081 | 3663 | doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */); |
db9f0278 | 3664 | |
556d7314 | 3665 | DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue, |
9dbc9081 PJ |
3666 | doc: /* Non-nil means debugger may continue execution. |
3667 | This is nil when the debugger is called under circumstances where it | |
3668 | might not be safe to continue. */); | |
dac204bc | 3669 | debugger_may_continue = 1; |
556d7314 | 3670 | |
db9f0278 | 3671 | DEFVAR_LISP ("debugger", &Vdebugger, |
9dbc9081 PJ |
3672 | doc: /* Function to call to invoke debugger. |
3673 | If due to frame exit, args are `exit' and the value being returned; | |
3674 | this function's value will be returned instead of that. | |
3675 | If due to error, args are `error' and a list of the args to `signal'. | |
3676 | If due to `apply' or `funcall' entry, one arg, `lambda'. | |
3677 | If due to `eval' entry, one arg, t. */); | |
db9f0278 JB |
3678 | Vdebugger = Qnil; |
3679 | ||
61ede770 | 3680 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
9dbc9081 PJ |
3681 | doc: /* If non-nil, this is a function for `signal' to call. |
3682 | It receives the same arguments that `signal' was given. | |
3683 | The Edebug package uses this to regain control. */); | |
61ede770 RS |
3684 | Vsignal_hook_function = Qnil; |
3685 | ||
57a6e758 | 3686 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
9dbc9081 PJ |
3687 | doc: /* *Non-nil means call the debugger regardless of condition handlers. |
3688 | Note that `debug-on-error', `debug-on-quit' and friends | |
3689 | still determine whether to handle the particular condition. */); | |
57a6e758 | 3690 | Vdebug_on_signal = Qnil; |
61ede770 | 3691 | |
d6edd563 GM |
3692 | DEFVAR_LISP ("macro-declaration-function", &Vmacro_declaration_function, |
3693 | doc: /* Function to process declarations in a macro definition. | |
3694 | The function will be called with two args MACRO and DECL. | |
3695 | MACRO is the name of the macro being defined. | |
3696 | DECL is a list `(declare ...)' containing the declarations. | |
3697 | The value the function returns is not used. */); | |
3698 | Vmacro_declaration_function = Qnil; | |
3699 | ||
6e6e9f08 RS |
3700 | Vrun_hooks = intern ("run-hooks"); |
3701 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3702 | |
3703 | staticpro (&Vautoload_queue); | |
3704 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3705 | staticpro (&Vsignaling_function); |
3706 | Vsignaling_function = Qnil; | |
db9f0278 JB |
3707 | |
3708 | defsubr (&Sor); | |
3709 | defsubr (&Sand); | |
3710 | defsubr (&Sif); | |
3711 | defsubr (&Scond); | |
3712 | defsubr (&Sprogn); | |
3713 | defsubr (&Sprog1); | |
3714 | defsubr (&Sprog2); | |
3715 | defsubr (&Ssetq); | |
3716 | defsubr (&Squote); | |
3717 | defsubr (&Sfunction); | |
3718 | defsubr (&Sdefun); | |
3719 | defsubr (&Sdefmacro); | |
3720 | defsubr (&Sdefvar); | |
19cebf5a | 3721 | defsubr (&Sdefvaralias); |
db9f0278 JB |
3722 | defsubr (&Sdefconst); |
3723 | defsubr (&Suser_variable_p); | |
3724 | defsubr (&Slet); | |
3725 | defsubr (&SletX); | |
3726 | defsubr (&Swhile); | |
3727 | defsubr (&Smacroexpand); | |
3728 | defsubr (&Scatch); | |
3729 | defsubr (&Sthrow); | |
3730 | defsubr (&Sunwind_protect); | |
3731 | defsubr (&Scondition_case); | |
3732 | defsubr (&Ssignal); | |
3733 | defsubr (&Sinteractive_p); | |
4b664e76 | 3734 | defsubr (&Scalled_interactively_p); |
db9f0278 JB |
3735 | defsubr (&Scommandp); |
3736 | defsubr (&Sautoload); | |
3737 | defsubr (&Seval); | |
3738 | defsubr (&Sapply); | |
3739 | defsubr (&Sfuncall); | |
ff936e53 SM |
3740 | defsubr (&Srun_hooks); |
3741 | defsubr (&Srun_hook_with_args); | |
3742 | defsubr (&Srun_hook_with_args_until_success); | |
3743 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3744 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3745 | defsubr (&Sbacktrace_debug); |
3746 | defsubr (&Sbacktrace); | |
3747 | defsubr (&Sbacktrace_frame); | |
3748 | } | |
ab5796a9 MB |
3749 | |
3750 | /* arch-tag: 014a07aa-33ab-4a8f-a3d2-ee8a4a9ff7fb | |
3751 | (do not change this comment) */ |