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, |
76b6f707 | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
8cabe764 | 4 | Free Software Foundation, Inc. |
db9f0278 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
db9f0278 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
db9f0278 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
db9f0278 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
db9f0278 | 23 | #include "lisp.h" |
9ac0d9e0 | 24 | #include "blockinput.h" |
db9f0278 | 25 | #include "commands.h" |
1f98fa48 | 26 | #include "keyboard.h" |
3648c842 | 27 | #include "dispextern.h" |
db9f0278 JB |
28 | #include <setjmp.h> |
29 | ||
b70e1a2b SM |
30 | #if HAVE_X_WINDOWS |
31 | #include "xterm.h" | |
32 | #endif | |
33 | ||
db9f0278 JB |
34 | /* This definition is duplicated in alloc.c and keyboard.c */ |
35 | /* Putting it in lisp.h makes cc bomb out! */ | |
36 | ||
37 | struct backtrace | |
4c576a83 GM |
38 | { |
39 | struct backtrace *next; | |
40 | Lisp_Object *function; | |
41 | Lisp_Object *args; /* Points to vector of args. */ | |
42 | int nargs; /* Length of vector. | |
daa37602 JB |
43 | If nargs is UNEVALLED, args points to slot holding |
44 | list of unevalled args */ | |
4c576a83 GM |
45 | char evalargs; |
46 | /* Nonzero means call value of debugger when done with this operation. */ | |
47 | char debug_on_exit; | |
48 | }; | |
db9f0278 JB |
49 | |
50 | struct backtrace *backtrace_list; | |
51 | ||
82da7701 JB |
52 | /* This structure helps implement the `catch' and `throw' control |
53 | structure. A struct catchtag contains all the information needed | |
54 | to restore the state of the interpreter after a non-local jump. | |
55 | ||
56 | Handlers for error conditions (represented by `struct handler' | |
57 | structures) just point to a catch tag to do the cleanup required | |
58 | for their jumps. | |
59 | ||
60 | catchtag structures are chained together in the C calling stack; | |
61 | the `next' member points to the next outer catchtag. | |
62 | ||
63 | A call like (throw TAG VAL) searches for a catchtag whose `tag' | |
64 | member is TAG, and then unbinds to it. The `val' member is used to | |
65 | hold VAL while the stack is unwound; `val' is returned as the value | |
66 | of the catch form. | |
67 | ||
68 | All the other members are concerned with restoring the interpreter | |
69 | state. */ | |
4c576a83 | 70 | |
db9f0278 | 71 | struct catchtag |
4c576a83 GM |
72 | { |
73 | Lisp_Object tag; | |
74 | Lisp_Object val; | |
75 | struct catchtag *next; | |
76 | struct gcpro *gcpro; | |
77 | jmp_buf jmp; | |
78 | struct backtrace *backlist; | |
79 | struct handler *handlerlist; | |
80 | int lisp_eval_depth; | |
81 | int pdlcount; | |
82 | int poll_suppress_count; | |
2659a09f | 83 | int interrupt_input_blocked; |
4c576a83 GM |
84 | struct byte_stack *byte_stack; |
85 | }; | |
db9f0278 JB |
86 | |
87 | struct catchtag *catchlist; | |
88 | ||
15934ffa RS |
89 | #ifdef DEBUG_GCPRO |
90 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
91 | int gcpro_level; | |
92 | #endif | |
93 | ||
6fd797f5 | 94 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
ad236261 | 95 | Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag; |
db9f0278 JB |
96 | Lisp_Object Qand_rest, Qand_optional; |
97 | Lisp_Object Qdebug_on_error; | |
d6edd563 | 98 | Lisp_Object Qdeclare; |
f01cbfdd | 99 | Lisp_Object Qdebug; |
db9f0278 | 100 | |
6e6e9f08 RS |
101 | /* This holds either the symbol `run-hooks' or nil. |
102 | It is nil at an early stage of startup, and when Emacs | |
103 | is shutting down. */ | |
4c576a83 | 104 | |
db9f0278 JB |
105 | Lisp_Object Vrun_hooks; |
106 | ||
107 | /* Non-nil means record all fset's and provide's, to be undone | |
108 | if the file being autoloaded is not fully loaded. | |
109 | They are recorded by being consed onto the front of Vautoload_queue: | |
47b82df9 | 110 | (FUN . ODEF) for a defun, (0 . OFEATURES) for a provide. */ |
db9f0278 JB |
111 | |
112 | Lisp_Object Vautoload_queue; | |
113 | ||
114 | /* Current number of specbindings allocated in specpdl. */ | |
4c576a83 | 115 | |
db9f0278 JB |
116 | int specpdl_size; |
117 | ||
118 | /* Pointer to beginning of specpdl. */ | |
4c576a83 | 119 | |
db9f0278 JB |
120 | struct specbinding *specpdl; |
121 | ||
122 | /* Pointer to first unused element in specpdl. */ | |
4c576a83 | 123 | |
ab837828 | 124 | struct specbinding *specpdl_ptr; |
db9f0278 JB |
125 | |
126 | /* Maximum size allowed for specpdl allocation */ | |
4c576a83 | 127 | |
31ade731 | 128 | EMACS_INT max_specpdl_size; |
db9f0278 JB |
129 | |
130 | /* Depth in Lisp evaluations and function calls. */ | |
4c576a83 | 131 | |
db9f0278 JB |
132 | int lisp_eval_depth; |
133 | ||
134 | /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
4c576a83 | 135 | |
31ade731 | 136 | EMACS_INT max_lisp_eval_depth; |
db9f0278 JB |
137 | |
138 | /* Nonzero means enter debugger before next function call */ | |
4c576a83 | 139 | |
db9f0278 JB |
140 | int debug_on_next_call; |
141 | ||
1b1acc13 | 142 | /* Non-zero means debugger may continue. This is zero when the |
556d7314 GM |
143 | debugger is called during redisplay, where it might not be safe to |
144 | continue the interrupted redisplay. */ | |
145 | ||
146 | int debugger_may_continue; | |
147 | ||
128c0f66 | 148 | /* List of conditions (non-nil atom means all) which cause a backtrace |
4de86b16 | 149 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 150 | |
128c0f66 | 151 | Lisp_Object Vstack_trace_on_error; |
db9f0278 | 152 | |
128c0f66 | 153 | /* List of conditions (non-nil atom means all) which enter the debugger |
4de86b16 | 154 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 155 | |
128c0f66 | 156 | Lisp_Object Vdebug_on_error; |
db9f0278 | 157 | |
fc950e09 | 158 | /* List of conditions and regexps specifying error messages which |
1b1acc13 | 159 | do not enter the debugger even if Vdebug_on_error says they should. */ |
4c576a83 | 160 | |
fc950e09 KH |
161 | Lisp_Object Vdebug_ignored_errors; |
162 | ||
61ede770 | 163 | /* Non-nil means call the debugger even if the error will be handled. */ |
4c576a83 | 164 | |
57a6e758 | 165 | Lisp_Object Vdebug_on_signal; |
61ede770 RS |
166 | |
167 | /* Hook for edebug to use. */ | |
4c576a83 | 168 | |
61ede770 RS |
169 | Lisp_Object Vsignal_hook_function; |
170 | ||
db9f0278 | 171 | /* Nonzero means enter debugger if a quit signal |
128c0f66 | 172 | is handled by the command loop's error handler. */ |
4c576a83 | 173 | |
db9f0278 JB |
174 | int debug_on_quit; |
175 | ||
be857679 | 176 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 177 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 178 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
179 | know that the debugger itself has an error, and we should just |
180 | signal the error instead of entering an infinite loop of debugger | |
181 | invocations. */ | |
4c576a83 | 182 | |
82da7701 | 183 | int when_entered_debugger; |
db9f0278 JB |
184 | |
185 | Lisp_Object Vdebugger; | |
186 | ||
a2ff3819 GM |
187 | /* The function from which the last `signal' was called. Set in |
188 | Fsignal. */ | |
189 | ||
190 | Lisp_Object Vsignaling_function; | |
191 | ||
4c576a83 GM |
192 | /* Set to non-zero while processing X events. Checked in Feval to |
193 | make sure the Lisp interpreter isn't called from a signal handler, | |
194 | which is unsafe because the interpreter isn't reentrant. */ | |
195 | ||
196 | int handling_signal; | |
197 | ||
d6edd563 GM |
198 | /* Function to process declarations in defmacro forms. */ |
199 | ||
200 | Lisp_Object Vmacro_declaration_function; | |
201 | ||
873759d5 | 202 | extern Lisp_Object Qrisky_local_variable; |
d6edd563 | 203 | |
1283140e RS |
204 | extern Lisp_Object Qfunction; |
205 | ||
2901f1d1 | 206 | static Lisp_Object funcall_lambda P_ ((Lisp_Object, int, Lisp_Object*)); |
2381d38d | 207 | static void unwind_to_catch P_ ((struct catchtag *, Lisp_Object)) NO_RETURN; |
eaa1e5ed EZ |
208 | |
209 | #if __GNUC__ | |
210 | /* "gcc -O3" enables automatic function inlining, which optimizes out | |
211 | the arguments for the invocations of these functions, whereas they | |
212 | expect these values on the stack. */ | |
213 | Lisp_Object apply1 () __attribute__((noinline)); | |
214 | Lisp_Object call2 () __attribute__((noinline)); | |
215 | #endif | |
873759d5 | 216 | \f |
dfcf069d | 217 | void |
db9f0278 JB |
218 | init_eval_once () |
219 | { | |
220 | specpdl_size = 50; | |
716acfce | 221 | specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding)); |
270e8074 | 222 | specpdl_ptr = specpdl; |
6588243d | 223 | /* Don't forget to update docs (lispref node "Local Variables"). */ |
a4547405 | 224 | max_specpdl_size = 1000; |
be436d23 | 225 | max_lisp_eval_depth = 400; |
34d470ba RS |
226 | |
227 | Vrun_hooks = Qnil; | |
db9f0278 JB |
228 | } |
229 | ||
dfcf069d | 230 | void |
db9f0278 JB |
231 | init_eval () |
232 | { | |
233 | specpdl_ptr = specpdl; | |
234 | catchlist = 0; | |
235 | handlerlist = 0; | |
236 | backtrace_list = 0; | |
237 | Vquit_flag = Qnil; | |
238 | debug_on_next_call = 0; | |
239 | lisp_eval_depth = 0; | |
87e21fbd | 240 | #ifdef DEBUG_GCPRO |
15934ffa | 241 | gcpro_level = 0; |
87e21fbd | 242 | #endif |
be857679 | 243 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 244 | when_entered_debugger = -1; |
db9f0278 JB |
245 | } |
246 | ||
9f5903bb RS |
247 | /* unwind-protect function used by call_debugger. */ |
248 | ||
249 | static Lisp_Object | |
250 | restore_stack_limits (data) | |
251 | Lisp_Object data; | |
252 | { | |
253 | max_specpdl_size = XINT (XCAR (data)); | |
254 | max_lisp_eval_depth = XINT (XCDR (data)); | |
538f78c3 | 255 | return Qnil; |
9f5903bb RS |
256 | } |
257 | ||
258 | /* Call the Lisp debugger, giving it argument ARG. */ | |
259 | ||
db9f0278 JB |
260 | Lisp_Object |
261 | call_debugger (arg) | |
262 | Lisp_Object arg; | |
263 | { | |
3648c842 | 264 | int debug_while_redisplaying; |
aed13378 | 265 | int count = SPECPDL_INDEX (); |
3648c842 | 266 | Lisp_Object val; |
9f5903bb | 267 | int old_max = max_specpdl_size; |
177c0ea7 | 268 | |
9f5903bb RS |
269 | /* Temporarily bump up the stack limits, |
270 | so the debugger won't run out of stack. */ | |
177c0ea7 | 271 | |
9f5903bb RS |
272 | max_specpdl_size += 1; |
273 | record_unwind_protect (restore_stack_limits, | |
274 | Fcons (make_number (old_max), | |
275 | make_number (max_lisp_eval_depth))); | |
276 | max_specpdl_size = old_max; | |
277 | ||
278 | if (lisp_eval_depth + 40 > max_lisp_eval_depth) | |
279 | max_lisp_eval_depth = lisp_eval_depth + 40; | |
280 | ||
281 | if (SPECPDL_INDEX () + 100 > max_specpdl_size) | |
282 | max_specpdl_size = SPECPDL_INDEX () + 100; | |
177c0ea7 | 283 | |
d148e14d | 284 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
285 | if (display_hourglass_p) |
286 | cancel_hourglass (); | |
237c23b0 GM |
287 | #endif |
288 | ||
db9f0278 | 289 | debug_on_next_call = 0; |
be857679 | 290 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
291 | |
292 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
293 | displayed if the debugger is invoked during redisplay. */ | |
294 | debug_while_redisplaying = redisplaying_p; | |
295 | redisplaying_p = 0; | |
556d7314 GM |
296 | specbind (intern ("debugger-may-continue"), |
297 | debug_while_redisplaying ? Qnil : Qt); | |
8efb6cc7 | 298 | specbind (Qinhibit_redisplay, Qnil); |
9f5903bb | 299 | specbind (Qdebug_on_error, Qnil); |
9db6f6b4 GM |
300 | |
301 | #if 0 /* Binding this prevents execution of Lisp code during | |
302 | redisplay, which necessarily leads to display problems. */ | |
8efb6cc7 | 303 | specbind (Qinhibit_eval_during_redisplay, Qt); |
9db6f6b4 | 304 | #endif |
177c0ea7 | 305 | |
3648c842 GM |
306 | val = apply1 (Vdebugger, arg); |
307 | ||
308 | /* Interrupting redisplay and resuming it later is not safe under | |
309 | all circumstances. So, when the debugger returns, abort the | |
1b1acc13 | 310 | interrupted redisplay by going back to the top-level. */ |
3648c842 GM |
311 | if (debug_while_redisplaying) |
312 | Ftop_level (); | |
313 | ||
556d7314 | 314 | return unbind_to (count, val); |
db9f0278 JB |
315 | } |
316 | ||
dfcf069d | 317 | void |
db9f0278 JB |
318 | do_debug_on_call (code) |
319 | Lisp_Object code; | |
320 | { | |
321 | debug_on_next_call = 0; | |
322 | backtrace_list->debug_on_exit = 1; | |
323 | call_debugger (Fcons (code, Qnil)); | |
324 | } | |
325 | \f | |
326 | /* NOTE!!! Every function that can call EVAL must protect its args | |
327 | and temporaries from garbage collection while it needs them. | |
328 | The definition of `For' shows what you have to do. */ | |
329 | ||
330 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
331 | doc: /* Eval args until one of them yields non-nil, then return that value. |
332 | The remaining args are not evalled at all. | |
333 | If all args return nil, return nil. | |
533eb34b | 334 | usage: (or CONDITIONS...) */) |
9dbc9081 | 335 | (args) |
db9f0278 JB |
336 | Lisp_Object args; |
337 | { | |
e509f168 | 338 | register Lisp_Object val = Qnil; |
db9f0278 JB |
339 | struct gcpro gcpro1; |
340 | ||
e509f168 | 341 | GCPRO1 (args); |
db9f0278 | 342 | |
e509f168 | 343 | while (CONSP (args)) |
db9f0278 | 344 | { |
e509f168 | 345 | val = Feval (XCAR (args)); |
265a9e55 | 346 | if (!NILP (val)) |
db9f0278 | 347 | break; |
e509f168 | 348 | args = XCDR (args); |
db9f0278 | 349 | } |
db9f0278 JB |
350 | |
351 | UNGCPRO; | |
352 | return val; | |
353 | } | |
354 | ||
355 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
b8de5714 | 356 | doc: /* Eval args until one of them yields nil, then return nil. |
9dbc9081 PJ |
357 | The remaining args are not evalled at all. |
358 | If no arg yields nil, return the last arg's value. | |
533eb34b | 359 | usage: (and CONDITIONS...) */) |
9dbc9081 | 360 | (args) |
db9f0278 JB |
361 | Lisp_Object args; |
362 | { | |
e509f168 | 363 | register Lisp_Object val = Qt; |
db9f0278 JB |
364 | struct gcpro gcpro1; |
365 | ||
e509f168 | 366 | GCPRO1 (args); |
db9f0278 | 367 | |
e509f168 | 368 | while (CONSP (args)) |
db9f0278 | 369 | { |
e509f168 | 370 | val = Feval (XCAR (args)); |
265a9e55 | 371 | if (NILP (val)) |
db9f0278 | 372 | break; |
e509f168 | 373 | args = XCDR (args); |
db9f0278 | 374 | } |
db9f0278 JB |
375 | |
376 | UNGCPRO; | |
377 | return val; | |
378 | } | |
379 | ||
380 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
b8de5714 | 381 | doc: /* If COND yields non-nil, do THEN, else do ELSE... |
9dbc9081 PJ |
382 | Returns the value of THEN or the value of the last of the ELSE's. |
383 | THEN must be one expression, but ELSE... can be zero or more expressions. | |
384 | If COND yields nil, and there are no ELSE's, the value is nil. | |
7a25dc6d | 385 | usage: (if COND THEN ELSE...) */) |
9dbc9081 | 386 | (args) |
db9f0278 JB |
387 | Lisp_Object args; |
388 | { | |
389 | register Lisp_Object cond; | |
390 | struct gcpro gcpro1; | |
391 | ||
392 | GCPRO1 (args); | |
393 | cond = Feval (Fcar (args)); | |
394 | UNGCPRO; | |
395 | ||
265a9e55 | 396 | if (!NILP (cond)) |
db9f0278 JB |
397 | return Feval (Fcar (Fcdr (args))); |
398 | return Fprogn (Fcdr (Fcdr (args))); | |
399 | } | |
400 | ||
401 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
402 | doc: /* Try each clause until one succeeds. |
403 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated | |
404 | and, if the value is non-nil, this clause succeeds: | |
405 | then the expressions in BODY are evaluated and the last one's | |
406 | value is the value of the cond-form. | |
407 | If no clause succeeds, cond returns nil. | |
408 | If a clause has one element, as in (CONDITION), | |
409 | CONDITION's value if non-nil is returned from the cond-form. | |
7a25dc6d | 410 | usage: (cond CLAUSES...) */) |
9dbc9081 | 411 | (args) |
db9f0278 JB |
412 | Lisp_Object args; |
413 | { | |
414 | register Lisp_Object clause, val; | |
415 | struct gcpro gcpro1; | |
416 | ||
417 | val = Qnil; | |
418 | GCPRO1 (args); | |
265a9e55 | 419 | while (!NILP (args)) |
db9f0278 JB |
420 | { |
421 | clause = Fcar (args); | |
422 | val = Feval (Fcar (clause)); | |
265a9e55 | 423 | if (!NILP (val)) |
db9f0278 | 424 | { |
03699b14 KR |
425 | if (!EQ (XCDR (clause), Qnil)) |
426 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
427 | break; |
428 | } | |
03699b14 | 429 | args = XCDR (args); |
db9f0278 JB |
430 | } |
431 | UNGCPRO; | |
432 | ||
433 | return val; | |
434 | } | |
435 | ||
436 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
9dbc9081 | 437 | doc: /* Eval BODY forms sequentially and return value of last one. |
5b4a1f50 | 438 | usage: (progn BODY...) */) |
9dbc9081 | 439 | (args) |
db9f0278 JB |
440 | Lisp_Object args; |
441 | { | |
e509f168 | 442 | register Lisp_Object val = Qnil; |
db9f0278 JB |
443 | struct gcpro gcpro1; |
444 | ||
e509f168 | 445 | GCPRO1 (args); |
db9f0278 | 446 | |
e509f168 | 447 | while (CONSP (args)) |
db9f0278 | 448 | { |
e509f168 SM |
449 | val = Feval (XCAR (args)); |
450 | args = XCDR (args); | |
db9f0278 | 451 | } |
db9f0278 JB |
452 | |
453 | UNGCPRO; | |
454 | return val; | |
455 | } | |
456 | ||
457 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
bdee2ef3 | 458 | doc: /* Eval FIRST and BODY sequentially; return value from FIRST. |
9dbc9081 PJ |
459 | The value of FIRST is saved during the evaluation of the remaining args, |
460 | whose values are discarded. | |
7a25dc6d | 461 | usage: (prog1 FIRST BODY...) */) |
9dbc9081 | 462 | (args) |
db9f0278 JB |
463 | Lisp_Object args; |
464 | { | |
465 | Lisp_Object val; | |
466 | register Lisp_Object args_left; | |
467 | struct gcpro gcpro1, gcpro2; | |
468 | register int argnum = 0; | |
469 | ||
9ac66b45 | 470 | if (NILP (args)) |
db9f0278 JB |
471 | return Qnil; |
472 | ||
473 | args_left = args; | |
474 | val = Qnil; | |
475 | GCPRO2 (args, val); | |
476 | ||
477 | do | |
478 | { | |
479 | if (!(argnum++)) | |
480 | val = Feval (Fcar (args_left)); | |
481 | else | |
482 | Feval (Fcar (args_left)); | |
483 | args_left = Fcdr (args_left); | |
484 | } | |
265a9e55 | 485 | while (!NILP(args_left)); |
db9f0278 JB |
486 | |
487 | UNGCPRO; | |
488 | return val; | |
489 | } | |
490 | ||
491 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
bdee2ef3 | 492 | doc: /* Eval FORM1, FORM2 and BODY sequentially; return value from FORM2. |
82fc29a1 JB |
493 | The value of FORM2 is saved during the evaluation of the |
494 | remaining args, whose values are discarded. | |
495 | usage: (prog2 FORM1 FORM2 BODY...) */) | |
9dbc9081 | 496 | (args) |
db9f0278 JB |
497 | Lisp_Object args; |
498 | { | |
499 | Lisp_Object val; | |
500 | register Lisp_Object args_left; | |
501 | struct gcpro gcpro1, gcpro2; | |
502 | register int argnum = -1; | |
503 | ||
504 | val = Qnil; | |
505 | ||
87d238ba | 506 | if (NILP (args)) |
db9f0278 JB |
507 | return Qnil; |
508 | ||
509 | args_left = args; | |
510 | val = Qnil; | |
511 | GCPRO2 (args, val); | |
512 | ||
513 | do | |
514 | { | |
515 | if (!(argnum++)) | |
516 | val = Feval (Fcar (args_left)); | |
517 | else | |
518 | Feval (Fcar (args_left)); | |
519 | args_left = Fcdr (args_left); | |
520 | } | |
87d238ba | 521 | while (!NILP (args_left)); |
db9f0278 JB |
522 | |
523 | UNGCPRO; | |
524 | return val; | |
525 | } | |
526 | ||
527 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
528 | doc: /* Set each SYM to the value of its VAL. |
529 | The symbols SYM are variables; they are literal (not evaluated). | |
530 | The values VAL are expressions; they are evaluated. | |
531 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
532 | The second VAL is not computed until after the first SYM is set, and so on; | |
533 | each VAL can use the new value of variables set earlier in the `setq'. | |
534 | The return value of the `setq' form is the value of the last VAL. | |
819586b2 | 535 | usage: (setq [SYM VAL]...) */) |
9dbc9081 | 536 | (args) |
db9f0278 JB |
537 | Lisp_Object args; |
538 | { | |
539 | register Lisp_Object args_left; | |
540 | register Lisp_Object val, sym; | |
541 | struct gcpro gcpro1; | |
542 | ||
1283140e | 543 | if (NILP (args)) |
db9f0278 JB |
544 | return Qnil; |
545 | ||
546 | args_left = args; | |
547 | GCPRO1 (args); | |
548 | ||
549 | do | |
550 | { | |
551 | val = Feval (Fcar (Fcdr (args_left))); | |
552 | sym = Fcar (args_left); | |
553 | Fset (sym, val); | |
554 | args_left = Fcdr (Fcdr (args_left)); | |
555 | } | |
265a9e55 | 556 | while (!NILP(args_left)); |
db9f0278 JB |
557 | |
558 | UNGCPRO; | |
559 | return val; | |
560 | } | |
177c0ea7 | 561 | |
db9f0278 | 562 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, |
9dbc9081 PJ |
563 | doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'. |
564 | usage: (quote ARG) */) | |
565 | (args) | |
db9f0278 JB |
566 | Lisp_Object args; |
567 | { | |
1283140e RS |
568 | if (!NILP (Fcdr (args))) |
569 | xsignal2 (Qwrong_number_of_arguments, Qquote, Flength (args)); | |
db9f0278 JB |
570 | return Fcar (args); |
571 | } | |
177c0ea7 | 572 | |
db9f0278 | 573 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, |
9dbc9081 PJ |
574 | doc: /* Like `quote', but preferred for objects which are functions. |
575 | In byte compilation, `function' causes its argument to be compiled. | |
576 | `quote' cannot do that. | |
577 | usage: (function ARG) */) | |
578 | (args) | |
db9f0278 JB |
579 | Lisp_Object args; |
580 | { | |
1283140e RS |
581 | if (!NILP (Fcdr (args))) |
582 | xsignal2 (Qwrong_number_of_arguments, Qfunction, Flength (args)); | |
db9f0278 JB |
583 | return Fcar (args); |
584 | } | |
585 | ||
e0f331ab | 586 | |
db9f0278 | 587 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, |
c63df42b | 588 | doc: /* Return t if the function was run directly by user input. |
82fc29a1 JB |
589 | This means that the function was called with `call-interactively' |
590 | \(which includes being called as the binding of a key) | |
c63df42b RS |
591 | and input is currently coming from the keyboard (not in keyboard macro), |
592 | and Emacs is not running in batch mode (`noninteractive' is nil). | |
593 | ||
594 | The only known proper use of `interactive-p' is in deciding whether to | |
595 | display a helpful message, or how to display it. If you're thinking | |
596 | of using it for any other purpose, it is quite likely that you're | |
597 | making a mistake. Think: what do you want to do when the command is | |
598 | called from a keyboard macro? | |
599 | ||
600 | If you want to test whether your function was called with | |
601 | `call-interactively', the way to do that is by adding an extra | |
602 | optional argument, and making the `interactive' spec specify non-nil | |
603 | unconditionally for that argument. (`p' is a good way to do this.) */) | |
9dbc9081 | 604 | () |
db9f0278 | 605 | { |
c63df42b | 606 | return (INTERACTIVE && interactive_p (1)) ? Qt : Qnil; |
e0f331ab GM |
607 | } |
608 | ||
609 | ||
4b664e76 | 610 | DEFUN ("called-interactively-p", Fcalled_interactively_p, Scalled_interactively_p, 0, 0, 0, |
82fc29a1 | 611 | doc: /* Return t if the function using this was called with `call-interactively'. |
c63df42b RS |
612 | This is used for implementing advice and other function-modifying |
613 | features of Emacs. | |
614 | ||
615 | The cleanest way to test whether your function was called with | |
82fc29a1 JB |
616 | `call-interactively' is by adding an extra optional argument, |
617 | and making the `interactive' spec specify non-nil unconditionally | |
618 | for that argument. (`p' is a good way to do this.) */) | |
c63df42b RS |
619 | () |
620 | { | |
0b31741c | 621 | return interactive_p (1) ? Qt : Qnil; |
c63df42b RS |
622 | } |
623 | ||
624 | ||
625 | /* Return 1 if function in which this appears was called using | |
626 | call-interactively. | |
e0f331ab GM |
627 | |
628 | EXCLUDE_SUBRS_P non-zero means always return 0 if the function | |
629 | called is a built-in. */ | |
630 | ||
631 | int | |
632 | interactive_p (exclude_subrs_p) | |
633 | int exclude_subrs_p; | |
634 | { | |
635 | struct backtrace *btp; | |
636 | Lisp_Object fun; | |
db9f0278 | 637 | |
db9f0278 | 638 | btp = backtrace_list; |
daa37602 JB |
639 | |
640 | /* If this isn't a byte-compiled function, there may be a frame at | |
e0f331ab | 641 | the top for Finteractive_p. If so, skip it. */ |
a7f96a35 | 642 | fun = Findirect_function (*btp->function, Qnil); |
0b31741c RS |
643 | if (SUBRP (fun) && (XSUBR (fun) == &Sinteractive_p |
644 | || XSUBR (fun) == &Scalled_interactively_p)) | |
db9f0278 | 645 | btp = btp->next; |
daa37602 JB |
646 | |
647 | /* If we're running an Emacs 18-style byte-compiled function, there | |
4402a9ed RS |
648 | may be a frame for Fbytecode at the top level. In any version of |
649 | Emacs there can be Fbytecode frames for subexpressions evaluated | |
650 | inside catch and condition-case. Skip past them. | |
daa37602 | 651 | |
4402a9ed | 652 | If this isn't a byte-compiled function, then we may now be |
daa37602 | 653 | looking at several frames for special forms. Skip past them. */ |
4402a9ed RS |
654 | while (btp |
655 | && (EQ (*btp->function, Qbytecode) | |
656 | || btp->nargs == UNEVALLED)) | |
a6e3fa71 JB |
657 | btp = btp->next; |
658 | ||
daa37602 JB |
659 | /* btp now points at the frame of the innermost function that isn't |
660 | a special form, ignoring frames for Finteractive_p and/or | |
661 | Fbytecode at the top. If this frame is for a built-in function | |
662 | (such as load or eval-region) return nil. */ | |
a7f96a35 | 663 | fun = Findirect_function (*btp->function, Qnil); |
e0f331ab GM |
664 | if (exclude_subrs_p && SUBRP (fun)) |
665 | return 0; | |
177c0ea7 | 666 | |
db9f0278 JB |
667 | /* btp points to the frame of a Lisp function that called interactive-p. |
668 | Return t if that function was called interactively. */ | |
669 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
e0f331ab GM |
670 | return 1; |
671 | return 0; | |
db9f0278 JB |
672 | } |
673 | ||
e0f331ab | 674 | |
db9f0278 | 675 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, |
9dbc9081 PJ |
676 | doc: /* Define NAME as a function. |
677 | The definition is (lambda ARGLIST [DOCSTRING] BODY...). | |
678 | See also the function `interactive'. | |
7a25dc6d | 679 | usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */) |
9dbc9081 | 680 | (args) |
db9f0278 JB |
681 | Lisp_Object args; |
682 | { | |
683 | register Lisp_Object fn_name; | |
684 | register Lisp_Object defn; | |
685 | ||
686 | fn_name = Fcar (args); | |
6992a868 | 687 | CHECK_SYMBOL (fn_name); |
db9f0278 | 688 | defn = Fcons (Qlambda, Fcdr (args)); |
265a9e55 | 689 | if (!NILP (Vpurify_flag)) |
db9f0278 | 690 | defn = Fpurecopy (defn); |
f58e9f8c RS |
691 | if (CONSP (XSYMBOL (fn_name)->function) |
692 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
693 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 694 | Ffset (fn_name, defn); |
6fd797f5 | 695 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
696 | return fn_name; |
697 | } | |
698 | ||
699 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
9dbc9081 | 700 | doc: /* Define NAME as a macro. |
0654d6e3 RS |
701 | The actual definition looks like |
702 | (macro lambda ARGLIST [DOCSTRING] [DECL] BODY...). | |
9dbc9081 PJ |
703 | When the macro is called, as in (NAME ARGS...), |
704 | the function (lambda ARGLIST BODY...) is applied to | |
705 | the list ARGS... as it appears in the expression, | |
706 | and the result should be a form to be evaluated instead of the original. | |
0654d6e3 RS |
707 | |
708 | DECL is a declaration, optional, which can specify how to indent | |
4ba50634 JPW |
709 | calls to this macro, how Edebug should handle it, and which argument |
710 | should be treated as documentation. It looks like this: | |
0654d6e3 RS |
711 | (declare SPECS...) |
712 | The elements can look like this: | |
713 | (indent INDENT) | |
714 | Set NAME's `lisp-indent-function' property to INDENT. | |
715 | ||
e509f168 | 716 | (debug DEBUG) |
0654d6e3 | 717 | Set NAME's `edebug-form-spec' property to DEBUG. (This is |
7d5c86e5 | 718 | equivalent to writing a `def-edebug-spec' for the macro.) |
4ba50634 JPW |
719 | |
720 | (doc-string ELT) | |
721 | Set NAME's `doc-string-elt' property to ELT. | |
722 | ||
0654d6e3 | 723 | usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */) |
9dbc9081 | 724 | (args) |
db9f0278 JB |
725 | Lisp_Object args; |
726 | { | |
727 | register Lisp_Object fn_name; | |
728 | register Lisp_Object defn; | |
d6edd563 | 729 | Lisp_Object lambda_list, doc, tail; |
db9f0278 JB |
730 | |
731 | fn_name = Fcar (args); | |
8e975df9 | 732 | CHECK_SYMBOL (fn_name); |
d6edd563 GM |
733 | lambda_list = Fcar (Fcdr (args)); |
734 | tail = Fcdr (Fcdr (args)); | |
735 | ||
736 | doc = Qnil; | |
737 | if (STRINGP (Fcar (tail))) | |
738 | { | |
e509f168 SM |
739 | doc = XCAR (tail); |
740 | tail = XCDR (tail); | |
d6edd563 GM |
741 | } |
742 | ||
743 | while (CONSP (Fcar (tail)) | |
744 | && EQ (Fcar (Fcar (tail)), Qdeclare)) | |
745 | { | |
746 | if (!NILP (Vmacro_declaration_function)) | |
747 | { | |
748 | struct gcpro gcpro1; | |
749 | GCPRO1 (args); | |
750 | call2 (Vmacro_declaration_function, fn_name, Fcar (tail)); | |
751 | UNGCPRO; | |
752 | } | |
177c0ea7 | 753 | |
d6edd563 GM |
754 | tail = Fcdr (tail); |
755 | } | |
756 | ||
757 | if (NILP (doc)) | |
758 | tail = Fcons (lambda_list, tail); | |
759 | else | |
760 | tail = Fcons (lambda_list, Fcons (doc, tail)); | |
761 | defn = Fcons (Qmacro, Fcons (Qlambda, tail)); | |
177c0ea7 | 762 | |
265a9e55 | 763 | if (!NILP (Vpurify_flag)) |
db9f0278 | 764 | defn = Fpurecopy (defn); |
f58e9f8c RS |
765 | if (CONSP (XSYMBOL (fn_name)->function) |
766 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
767 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 768 | Ffset (fn_name, defn); |
6fd797f5 | 769 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
770 | return fn_name; |
771 | } | |
772 | ||
19cebf5a | 773 | |
1848d15d | 774 | DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0, |
4a9308b8 | 775 | doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE. |
e102f0d8 | 776 | Aliased variables always have the same value; setting one sets the other. |
4a9308b8 | 777 | Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is |
dd60787c GM |
778 | omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE, |
779 | or of the variable at the end of the chain of aliases, if BASE-VARIABLE is | |
780 | itself an alias. If NEW-ALIAS is bound, and BASE-VARIABLE is not, | |
781 | then the value of BASE-VARIABLE is set to that of NEW-ALIAS. | |
4a9308b8 JB |
782 | The return value is BASE-VARIABLE. */) |
783 | (new_alias, base_variable, docstring) | |
784 | Lisp_Object new_alias, base_variable, docstring; | |
19cebf5a GM |
785 | { |
786 | struct Lisp_Symbol *sym; | |
1848d15d | 787 | |
4a9308b8 JB |
788 | CHECK_SYMBOL (new_alias); |
789 | CHECK_SYMBOL (base_variable); | |
19cebf5a | 790 | |
4a9308b8 | 791 | if (SYMBOL_CONSTANT_P (new_alias)) |
19cebf5a GM |
792 | error ("Cannot make a constant an alias"); |
793 | ||
4a9308b8 | 794 | sym = XSYMBOL (new_alias); |
dd60787c GM |
795 | /* http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00834.html |
796 | If n_a is bound, but b_v is not, set the value of b_v to n_a. | |
797 | This is for the sake of define-obsolete-variable-alias and user | |
798 | customizations. */ | |
799 | if (NILP (Fboundp (base_variable)) && !NILP (Fboundp (new_alias))) | |
800 | XSYMBOL(base_variable)->value = sym->value; | |
19cebf5a | 801 | sym->indirect_variable = 1; |
4a9308b8 JB |
802 | sym->value = base_variable; |
803 | sym->constant = SYMBOL_CONSTANT_P (base_variable); | |
804 | LOADHIST_ATTACH (new_alias); | |
1848d15d | 805 | if (!NILP (docstring)) |
4a9308b8 | 806 | Fput (new_alias, Qvariable_documentation, docstring); |
bd81fcf8 | 807 | else |
4a9308b8 | 808 | Fput (new_alias, Qvariable_documentation, Qnil); |
1848d15d | 809 | |
4a9308b8 | 810 | return base_variable; |
19cebf5a GM |
811 | } |
812 | ||
813 | ||
db9f0278 | 814 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, |
29357847 | 815 | doc: /* Define SYMBOL as a variable, and return SYMBOL. |
9dbc9081 PJ |
816 | You are not required to define a variable in order to use it, |
817 | but the definition can supply documentation and an initial value | |
818 | in a way that tags can recognize. | |
819 | ||
820 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void. | |
821 | If SYMBOL is buffer-local, its default value is what is set; | |
822 | buffer-local values are not affected. | |
823 | INITVALUE and DOCSTRING are optional. | |
824 | If DOCSTRING starts with *, this variable is identified as a user option. | |
825 | This means that M-x set-variable recognizes it. | |
826 | See also `user-variable-p'. | |
827 | If INITVALUE is missing, SYMBOL's value is not set. | |
733f68b6 LT |
828 | |
829 | If SYMBOL has a local binding, then this form affects the local | |
830 | binding. This is usually not what you want. Thus, if you need to | |
831 | load a file defining variables, with this form or with `defconst' or | |
832 | `defcustom', you should always load that file _outside_ any bindings | |
833 | for these variables. \(`defconst' and `defcustom' behave similarly in | |
834 | this respect.) | |
2df5238c | 835 | usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */) |
9dbc9081 | 836 | (args) |
db9f0278 JB |
837 | Lisp_Object args; |
838 | { | |
a42ba017 | 839 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
840 | |
841 | sym = Fcar (args); | |
a42ba017 RS |
842 | tail = Fcdr (args); |
843 | if (!NILP (Fcdr (Fcdr (tail)))) | |
921baa95 | 844 | error ("Too many arguments"); |
a42ba017 | 845 | |
33568849 | 846 | tem = Fdefault_boundp (sym); |
a42ba017 | 847 | if (!NILP (tail)) |
db9f0278 | 848 | { |
1c9916a1 SM |
849 | if (SYMBOL_CONSTANT_P (sym)) |
850 | { | |
851 | /* For upward compatibility, allow (defvar :foo (quote :foo)). */ | |
852 | Lisp_Object tem = Fcar (tail); | |
853 | if (! (CONSP (tem) | |
854 | && EQ (XCAR (tem), Qquote) | |
855 | && CONSP (XCDR (tem)) | |
856 | && EQ (XCAR (XCDR (tem)), sym))) | |
857 | error ("Constant symbol `%s' specified in defvar", | |
858 | SDATA (SYMBOL_NAME (sym))); | |
859 | } | |
860 | ||
265a9e55 | 861 | if (NILP (tem)) |
33568849 | 862 | Fset_default (sym, Feval (Fcar (tail))); |
d0bce91e SM |
863 | else |
864 | { /* Check if there is really a global binding rather than just a let | |
865 | binding that shadows the global unboundness of the var. */ | |
b28d0d9a | 866 | volatile struct specbinding *pdl = specpdl_ptr; |
d0bce91e SM |
867 | while (--pdl >= specpdl) |
868 | { | |
869 | if (EQ (pdl->symbol, sym) && !pdl->func | |
870 | && EQ (pdl->old_value, Qunbound)) | |
871 | { | |
872 | message_with_string ("Warning: defvar ignored because %s is let-bound", | |
873 | SYMBOL_NAME (sym), 1); | |
874 | break; | |
875 | } | |
876 | } | |
877 | } | |
33568849 | 878 | tail = Fcdr (tail); |
e509f168 SM |
879 | tem = Fcar (tail); |
880 | if (!NILP (tem)) | |
33568849 | 881 | { |
33568849 SM |
882 | if (!NILP (Vpurify_flag)) |
883 | tem = Fpurecopy (tem); | |
884 | Fput (sym, Qvariable_documentation, tem); | |
885 | } | |
6fd797f5 | 886 | LOADHIST_ATTACH (sym); |
db9f0278 | 887 | } |
33568849 | 888 | else |
d7c1d0fc RS |
889 | /* Simple (defvar <var>) should not count as a definition at all. |
890 | It could get in the way of other definitions, and unloading this | |
891 | package could try to make the variable unbound. */ | |
addf35fd AS |
892 | ; |
893 | ||
db9f0278 JB |
894 | return sym; |
895 | } | |
896 | ||
897 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
898 | doc: /* Define SYMBOL as a constant variable. |
899 | The intent is that neither programs nor users should ever change this value. | |
900 | Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
901 | If SYMBOL is buffer-local, its default value is what is set; | |
902 | buffer-local values are not affected. | |
903 | DOCSTRING is optional. | |
733f68b6 LT |
904 | |
905 | If SYMBOL has a local binding, then this form sets the local binding's | |
906 | value. However, you should normally not make local bindings for | |
907 | variables defined with this form. | |
7a25dc6d | 908 | usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */) |
9dbc9081 | 909 | (args) |
db9f0278 JB |
910 | Lisp_Object args; |
911 | { | |
912 | register Lisp_Object sym, tem; | |
913 | ||
914 | sym = Fcar (args); | |
a42ba017 | 915 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
921baa95 | 916 | error ("Too many arguments"); |
a42ba017 | 917 | |
1182a7cb DL |
918 | tem = Feval (Fcar (Fcdr (args))); |
919 | if (!NILP (Vpurify_flag)) | |
920 | tem = Fpurecopy (tem); | |
921 | Fset_default (sym, tem); | |
db9f0278 | 922 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 923 | if (!NILP (tem)) |
db9f0278 | 924 | { |
265a9e55 | 925 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
926 | tem = Fpurecopy (tem); |
927 | Fput (sym, Qvariable_documentation, tem); | |
928 | } | |
873759d5 | 929 | Fput (sym, Qrisky_local_variable, Qt); |
6fd797f5 | 930 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
931 | return sym; |
932 | } | |
933 | ||
606cdb89 JB |
934 | /* Error handler used in Fuser_variable_p. */ |
935 | static Lisp_Object | |
936 | user_variable_p_eh (ignore) | |
937 | Lisp_Object ignore; | |
938 | { | |
939 | return Qnil; | |
940 | } | |
941 | ||
40a69fac SM |
942 | static Lisp_Object |
943 | lisp_indirect_variable (Lisp_Object sym) | |
944 | { | |
945 | XSETSYMBOL (sym, indirect_variable (XSYMBOL (sym))); | |
946 | return sym; | |
947 | } | |
948 | ||
db9f0278 | 949 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, |
606cdb89 | 950 | doc: /* Return t if VARIABLE is intended to be set and modified by users. |
9dbc9081 | 951 | \(The alternative is a variable used internally in a Lisp program.) |
606cdb89 JB |
952 | A variable is a user variable if |
953 | \(1) the first character of its documentation is `*', or | |
954 | \(2) it is customizable (its property list contains a non-nil value | |
955 | of `standard-value' or `custom-autoload'), or | |
956 | \(3) it is an alias for another user variable. | |
957 | Return nil if VARIABLE is an alias and there is a loop in the | |
958 | chain of symbols. */) | |
9dbc9081 | 959 | (variable) |
db9f0278 JB |
960 | Lisp_Object variable; |
961 | { | |
962 | Lisp_Object documentation; | |
177c0ea7 | 963 | |
5e78e475 RS |
964 | if (!SYMBOLP (variable)) |
965 | return Qnil; | |
966 | ||
606cdb89 JB |
967 | /* If indirect and there's an alias loop, don't check anything else. */ |
968 | if (XSYMBOL (variable)->indirect_variable | |
40a69fac | 969 | && NILP (internal_condition_case_1 (lisp_indirect_variable, variable, |
606cdb89 JB |
970 | Qt, user_variable_p_eh))) |
971 | return Qnil; | |
972 | ||
973 | while (1) | |
974 | { | |
975 | documentation = Fget (variable, Qvariable_documentation); | |
976 | if (INTEGERP (documentation) && XINT (documentation) < 0) | |
977 | return Qt; | |
978 | if (STRINGP (documentation) | |
979 | && ((unsigned char) SREF (documentation, 0) == '*')) | |
980 | return Qt; | |
981 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
982 | if (CONSP (documentation) | |
983 | && STRINGP (XCAR (documentation)) | |
984 | && INTEGERP (XCDR (documentation)) | |
985 | && XINT (XCDR (documentation)) < 0) | |
986 | return Qt; | |
987 | /* Customizable? See `custom-variable-p'. */ | |
988 | if ((!NILP (Fget (variable, intern ("standard-value")))) | |
989 | || (!NILP (Fget (variable, intern ("custom-autoload"))))) | |
990 | return Qt; | |
991 | ||
992 | if (!XSYMBOL (variable)->indirect_variable) | |
993 | return Qnil; | |
994 | ||
995 | /* An indirect variable? Let's follow the chain. */ | |
996 | variable = XSYMBOL (variable)->value; | |
997 | } | |
177c0ea7 | 998 | } |
db9f0278 JB |
999 | \f |
1000 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1001 | doc: /* Bind variables according to VARLIST then eval BODY. |
1002 | The value of the last form in BODY is returned. | |
1003 | Each element of VARLIST is a symbol (which is bound to nil) | |
1004 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
1005 | Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
7a25dc6d | 1006 | usage: (let* VARLIST BODY...) */) |
9dbc9081 | 1007 | (args) |
db9f0278 JB |
1008 | Lisp_Object args; |
1009 | { | |
1010 | Lisp_Object varlist, val, elt; | |
aed13378 | 1011 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
1012 | struct gcpro gcpro1, gcpro2, gcpro3; |
1013 | ||
1014 | GCPRO3 (args, elt, varlist); | |
1015 | ||
1016 | varlist = Fcar (args); | |
265a9e55 | 1017 | while (!NILP (varlist)) |
db9f0278 JB |
1018 | { |
1019 | QUIT; | |
1020 | elt = Fcar (varlist); | |
90165123 | 1021 | if (SYMBOLP (elt)) |
db9f0278 | 1022 | specbind (elt, Qnil); |
08564963 | 1023 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1024 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1025 | else |
1026 | { | |
1027 | val = Feval (Fcar (Fcdr (elt))); | |
1028 | specbind (Fcar (elt), val); | |
1029 | } | |
1030 | varlist = Fcdr (varlist); | |
1031 | } | |
1032 | UNGCPRO; | |
1033 | val = Fprogn (Fcdr (args)); | |
1034 | return unbind_to (count, val); | |
1035 | } | |
1036 | ||
1037 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1038 | doc: /* Bind variables according to VARLIST then eval BODY. |
1039 | The value of the last form in BODY is returned. | |
1040 | Each element of VARLIST is a symbol (which is bound to nil) | |
1041 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
1042 | All the VALUEFORMs are evalled before any symbols are bound. | |
7a25dc6d | 1043 | usage: (let VARLIST BODY...) */) |
9dbc9081 | 1044 | (args) |
db9f0278 JB |
1045 | Lisp_Object args; |
1046 | { | |
1047 | Lisp_Object *temps, tem; | |
1048 | register Lisp_Object elt, varlist; | |
aed13378 | 1049 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
1050 | register int argnum; |
1051 | struct gcpro gcpro1, gcpro2; | |
1052 | ||
1053 | varlist = Fcar (args); | |
1054 | ||
1055 | /* Make space to hold the values to give the bound variables */ | |
1056 | elt = Flength (varlist); | |
1057 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
1058 | ||
1059 | /* Compute the values and store them in `temps' */ | |
1060 | ||
1061 | GCPRO2 (args, *temps); | |
1062 | gcpro2.nvars = 0; | |
1063 | ||
67ee9f6e | 1064 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 JB |
1065 | { |
1066 | QUIT; | |
67ee9f6e | 1067 | elt = XCAR (varlist); |
90165123 | 1068 | if (SYMBOLP (elt)) |
db9f0278 | 1069 | temps [argnum++] = Qnil; |
08564963 | 1070 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1071 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1072 | else |
1073 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
1074 | gcpro2.nvars = argnum; | |
1075 | } | |
1076 | UNGCPRO; | |
1077 | ||
1078 | varlist = Fcar (args); | |
67ee9f6e | 1079 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 | 1080 | { |
67ee9f6e | 1081 | elt = XCAR (varlist); |
db9f0278 | 1082 | tem = temps[argnum++]; |
90165123 | 1083 | if (SYMBOLP (elt)) |
db9f0278 JB |
1084 | specbind (elt, tem); |
1085 | else | |
1086 | specbind (Fcar (elt), tem); | |
1087 | } | |
1088 | ||
1089 | elt = Fprogn (Fcdr (args)); | |
1090 | return unbind_to (count, elt); | |
1091 | } | |
1092 | ||
1093 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1094 | doc: /* If TEST yields non-nil, eval BODY... and repeat. |
1095 | The order of execution is thus TEST, BODY, TEST, BODY and so on | |
1096 | until TEST returns nil. | |
7a25dc6d | 1097 | usage: (while TEST BODY...) */) |
9dbc9081 | 1098 | (args) |
db9f0278 JB |
1099 | Lisp_Object args; |
1100 | { | |
2b9bde76 | 1101 | Lisp_Object test, body; |
db9f0278 JB |
1102 | struct gcpro gcpro1, gcpro2; |
1103 | ||
1104 | GCPRO2 (test, body); | |
1105 | ||
1106 | test = Fcar (args); | |
1107 | body = Fcdr (args); | |
2b9bde76 | 1108 | while (!NILP (Feval (test))) |
db9f0278 JB |
1109 | { |
1110 | QUIT; | |
1111 | Fprogn (body); | |
1112 | } | |
1113 | ||
1114 | UNGCPRO; | |
1115 | return Qnil; | |
1116 | } | |
1117 | ||
1118 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
9dbc9081 PJ |
1119 | doc: /* Return result of expanding macros at top level of FORM. |
1120 | If FORM is not a macro call, it is returned unchanged. | |
1121 | Otherwise, the macro is expanded and the expansion is considered | |
1122 | in place of FORM. When a non-macro-call results, it is returned. | |
1123 | ||
1124 | The second optional arg ENVIRONMENT specifies an environment of macro | |
1125 | definitions to shadow the loaded ones for use in file byte-compilation. */) | |
1126 | (form, environment) | |
2e267a2e | 1127 | Lisp_Object form; |
79e8bfbf | 1128 | Lisp_Object environment; |
db9f0278 | 1129 | { |
23d6b5a6 | 1130 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
1131 | register Lisp_Object expander, sym, def, tem; |
1132 | ||
1133 | while (1) | |
1134 | { | |
1135 | /* Come back here each time we expand a macro call, | |
1136 | in case it expands into another macro call. */ | |
90165123 | 1137 | if (!CONSP (form)) |
db9f0278 | 1138 | break; |
23d6b5a6 | 1139 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 1140 | def = sym = XCAR (form); |
23d6b5a6 | 1141 | tem = Qnil; |
db9f0278 JB |
1142 | /* Trace symbols aliases to other symbols |
1143 | until we get a symbol that is not an alias. */ | |
90165123 | 1144 | while (SYMBOLP (def)) |
db9f0278 JB |
1145 | { |
1146 | QUIT; | |
23d6b5a6 | 1147 | sym = def; |
79e8bfbf | 1148 | tem = Fassq (sym, environment); |
265a9e55 | 1149 | if (NILP (tem)) |
db9f0278 JB |
1150 | { |
1151 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
1152 | if (!EQ (def, Qunbound)) |
1153 | continue; | |
db9f0278 | 1154 | } |
23d6b5a6 | 1155 | break; |
db9f0278 | 1156 | } |
79e8bfbf | 1157 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 1158 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 1159 | if (NILP (tem)) |
db9f0278 | 1160 | { |
79e8bfbf | 1161 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 1162 | Look at its function definition. */ |
90165123 | 1163 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
1164 | /* Not defined or definition not suitable */ |
1165 | break; | |
03699b14 | 1166 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
1167 | { |
1168 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 1169 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 1170 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
1171 | /* Yes, load it and try again. */ |
1172 | { | |
ca20916b RS |
1173 | struct gcpro gcpro1; |
1174 | GCPRO1 (form); | |
ee9ee63c | 1175 | do_autoload (def, sym); |
ca20916b | 1176 | UNGCPRO; |
ee9ee63c JB |
1177 | continue; |
1178 | } | |
1179 | else | |
db9f0278 | 1180 | break; |
db9f0278 | 1181 | } |
03699b14 | 1182 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 1183 | break; |
03699b14 | 1184 | else expander = XCDR (def); |
db9f0278 JB |
1185 | } |
1186 | else | |
1187 | { | |
03699b14 | 1188 | expander = XCDR (tem); |
265a9e55 | 1189 | if (NILP (expander)) |
db9f0278 JB |
1190 | break; |
1191 | } | |
03699b14 | 1192 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
1193 | } |
1194 | return form; | |
1195 | } | |
1196 | \f | |
1197 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1198 | doc: /* Eval BODY allowing nonlocal exits using `throw'. |
1199 | TAG is evalled to get the tag to use; it must not be nil. | |
1200 | ||
1201 | Then the BODY is executed. | |
1d632ccf | 1202 | Within BODY, a call to `throw' with the same TAG exits BODY and this `catch'. |
9dbc9081 PJ |
1203 | If no throw happens, `catch' returns the value of the last BODY form. |
1204 | If a throw happens, it specifies the value to return from `catch'. | |
7a25dc6d | 1205 | usage: (catch TAG BODY...) */) |
9dbc9081 | 1206 | (args) |
db9f0278 JB |
1207 | Lisp_Object args; |
1208 | { | |
1209 | register Lisp_Object tag; | |
1210 | struct gcpro gcpro1; | |
1211 | ||
1212 | GCPRO1 (args); | |
1213 | tag = Feval (Fcar (args)); | |
1214 | UNGCPRO; | |
1215 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
1216 | } | |
1217 | ||
1218 | /* Set up a catch, then call C function FUNC on argument ARG. | |
1219 | FUNC should return a Lisp_Object. | |
1220 | This is how catches are done from within C code. */ | |
1221 | ||
1222 | Lisp_Object | |
1223 | internal_catch (tag, func, arg) | |
1224 | Lisp_Object tag; | |
1225 | Lisp_Object (*func) (); | |
1226 | Lisp_Object arg; | |
1227 | { | |
1228 | /* This structure is made part of the chain `catchlist'. */ | |
1229 | struct catchtag c; | |
1230 | ||
1231 | /* Fill in the components of c, and put it on the list. */ | |
1232 | c.next = catchlist; | |
1233 | c.tag = tag; | |
1234 | c.val = Qnil; | |
1235 | c.backlist = backtrace_list; | |
1236 | c.handlerlist = handlerlist; | |
1237 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1238 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1239 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1240 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1241 | c.gcpro = gcprolist; |
bcf28080 | 1242 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1243 | catchlist = &c; |
1244 | ||
1245 | /* Call FUNC. */ | |
1246 | if (! _setjmp (c.jmp)) | |
1247 | c.val = (*func) (arg); | |
1248 | ||
1249 | /* Throw works by a longjmp that comes right here. */ | |
1250 | catchlist = c.next; | |
1251 | return c.val; | |
1252 | } | |
1253 | ||
ba410f40 JB |
1254 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1255 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1256 | |
ba410f40 JB |
1257 | This is the guts Fthrow and Fsignal; they differ only in the way |
1258 | they choose the catch tag to throw to. A catch tag for a | |
1259 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1260 | |
ba410f40 JB |
1261 | Before each catch is discarded, unbind all special bindings and |
1262 | execute all unwind-protect clauses made above that catch. Unwind | |
1263 | the handler stack as we go, so that the proper handlers are in | |
1264 | effect for each unwind-protect clause we run. At the end, restore | |
1265 | some static info saved in CATCH, and longjmp to the location | |
1266 | specified in the | |
1267 | ||
1268 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
1269 | |
1270 | static void | |
ba410f40 | 1271 | unwind_to_catch (catch, value) |
db9f0278 | 1272 | struct catchtag *catch; |
ba410f40 | 1273 | Lisp_Object value; |
db9f0278 JB |
1274 | { |
1275 | register int last_time; | |
1276 | ||
ba410f40 JB |
1277 | /* Save the value in the tag. */ |
1278 | catch->val = value; | |
1279 | ||
0b31741c | 1280 | /* Restore certain special C variables. */ |
1cdc3155 | 1281 | set_poll_suppress_count (catch->poll_suppress_count); |
c1788fbc | 1282 | UNBLOCK_INPUT_TO (catch->interrupt_input_blocked); |
0b31741c | 1283 | handling_signal = 0; |
69bbd6bd | 1284 | immediate_quit = 0; |
82da7701 | 1285 | |
db9f0278 JB |
1286 | do |
1287 | { | |
1288 | last_time = catchlist == catch; | |
82da7701 JB |
1289 | |
1290 | /* Unwind the specpdl stack, and then restore the proper set of | |
1291 | handlers. */ | |
db9f0278 JB |
1292 | unbind_to (catchlist->pdlcount, Qnil); |
1293 | handlerlist = catchlist->handlerlist; | |
1294 | catchlist = catchlist->next; | |
1295 | } | |
1296 | while (! last_time); | |
1297 | ||
a2a103bb | 1298 | #if HAVE_X_WINDOWS |
88019a63 RS |
1299 | /* If x_catch_errors was done, turn it off now. |
1300 | (First we give unbind_to a chance to do that.) */ | |
e6aee454 KL |
1301 | #if 0 /* This would disable x_catch_errors after x_connection_closed. |
1302 | * The catch must remain in effect during that delicate | |
1303 | * state. --lorentey */ | |
88019a63 | 1304 | x_fully_uncatch_errors (); |
e6aee454 | 1305 | #endif |
a2a103bb | 1306 | #endif |
88019a63 | 1307 | |
bcf28080 | 1308 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1309 | gcprolist = catch->gcpro; |
15934ffa RS |
1310 | #ifdef DEBUG_GCPRO |
1311 | if (gcprolist != 0) | |
1312 | gcpro_level = gcprolist->level + 1; | |
1313 | else | |
1314 | gcpro_level = 0; | |
1315 | #endif | |
db9f0278 JB |
1316 | backtrace_list = catch->backlist; |
1317 | lisp_eval_depth = catch->lisp_eval_depth; | |
177c0ea7 | 1318 | |
ba410f40 | 1319 | _longjmp (catch->jmp, 1); |
db9f0278 JB |
1320 | } |
1321 | ||
1322 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
9dbc9081 PJ |
1323 | doc: /* Throw to the catch for TAG and return VALUE from it. |
1324 | Both TAG and VALUE are evalled. */) | |
1325 | (tag, value) | |
79e8bfbf | 1326 | register Lisp_Object tag, value; |
db9f0278 JB |
1327 | { |
1328 | register struct catchtag *c; | |
1329 | ||
8788120f KS |
1330 | if (!NILP (tag)) |
1331 | for (c = catchlist; c; c = c->next) | |
1332 | { | |
1333 | if (EQ (c->tag, tag)) | |
1334 | unwind_to_catch (c, value); | |
1335 | } | |
734d55a2 | 1336 | xsignal2 (Qno_catch, tag, value); |
db9f0278 JB |
1337 | } |
1338 | ||
1339 | ||
1340 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1341 | doc: /* Do BODYFORM, protecting with UNWINDFORMS. |
1342 | If BODYFORM completes normally, its value is returned | |
1343 | after executing the UNWINDFORMS. | |
1344 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
7a25dc6d | 1345 | usage: (unwind-protect BODYFORM UNWINDFORMS...) */) |
9dbc9081 | 1346 | (args) |
db9f0278 JB |
1347 | Lisp_Object args; |
1348 | { | |
1349 | Lisp_Object val; | |
aed13378 | 1350 | int count = SPECPDL_INDEX (); |
db9f0278 | 1351 | |
04b28167 | 1352 | record_unwind_protect (Fprogn, Fcdr (args)); |
db9f0278 | 1353 | val = Feval (Fcar (args)); |
177c0ea7 | 1354 | return unbind_to (count, val); |
db9f0278 JB |
1355 | } |
1356 | \f | |
1357 | /* Chain of condition handlers currently in effect. | |
1358 | The elements of this chain are contained in the stack frames | |
1359 | of Fcondition_case and internal_condition_case. | |
1360 | When an error is signaled (by calling Fsignal, below), | |
1361 | this chain is searched for an element that applies. */ | |
1362 | ||
1363 | struct handler *handlerlist; | |
1364 | ||
1365 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
9dbc9081 | 1366 | doc: /* Regain control when an error is signaled. |
1b1acc13 | 1367 | Executes BODYFORM and returns its value if no error happens. |
9dbc9081 PJ |
1368 | Each element of HANDLERS looks like (CONDITION-NAME BODY...) |
1369 | where the BODY is made of Lisp expressions. | |
1370 | ||
1371 | A handler is applicable to an error | |
1372 | if CONDITION-NAME is one of the error's condition names. | |
1373 | If an error happens, the first applicable handler is run. | |
1374 | ||
1375 | The car of a handler may be a list of condition names | |
c997bb25 | 1376 | instead of a single condition name. Then it handles all of them. |
9dbc9081 | 1377 | |
c997bb25 RS |
1378 | When a handler handles an error, control returns to the `condition-case' |
1379 | and it executes the handler's BODY... | |
d0acbbaf | 1380 | with VAR bound to (ERROR-SYMBOL . SIGNAL-DATA) from the error. |
c997bb25 RS |
1381 | (If VAR is nil, the handler can't access that information.) |
1382 | Then the value of the last BODY form is returned from the `condition-case' | |
1383 | expression. | |
9dbc9081 | 1384 | |
9dbc9081 | 1385 | See also the function `signal' for more info. |
2b47b74d | 1386 | usage: (condition-case VAR BODYFORM &rest HANDLERS) */) |
9dbc9081 | 1387 | (args) |
db9f0278 JB |
1388 | Lisp_Object args; |
1389 | { | |
17401c97 GM |
1390 | register Lisp_Object bodyform, handlers; |
1391 | volatile Lisp_Object var; | |
db9f0278 | 1392 | |
82da7701 JB |
1393 | var = Fcar (args); |
1394 | bodyform = Fcar (Fcdr (args)); | |
1395 | handlers = Fcdr (Fcdr (args)); | |
ee830945 RS |
1396 | |
1397 | return internal_lisp_condition_case (var, bodyform, handlers); | |
1398 | } | |
1399 | ||
1400 | /* Like Fcondition_case, but the args are separate | |
1401 | rather than passed in a list. Used by Fbyte_code. */ | |
1402 | ||
1403 | Lisp_Object | |
1404 | internal_lisp_condition_case (var, bodyform, handlers) | |
1405 | volatile Lisp_Object var; | |
1406 | Lisp_Object bodyform, handlers; | |
1407 | { | |
1408 | Lisp_Object val; | |
1409 | struct catchtag c; | |
1410 | struct handler h; | |
1411 | ||
b7826503 | 1412 | CHECK_SYMBOL (var); |
82da7701 | 1413 | |
2b47b74d | 1414 | for (val = handlers; CONSP (val); val = XCDR (val)) |
82da7701 JB |
1415 | { |
1416 | Lisp_Object tem; | |
2b47b74d | 1417 | tem = XCAR (val); |
5f96776a RS |
1418 | if (! (NILP (tem) |
1419 | || (CONSP (tem) | |
03699b14 KR |
1420 | && (SYMBOLP (XCAR (tem)) |
1421 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1422 | error ("Invalid condition handler", tem); |
1423 | } | |
db9f0278 JB |
1424 | |
1425 | c.tag = Qnil; | |
1426 | c.val = Qnil; | |
1427 | c.backlist = backtrace_list; | |
1428 | c.handlerlist = handlerlist; | |
1429 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1430 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1431 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1432 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1433 | c.gcpro = gcprolist; |
bcf28080 | 1434 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1435 | if (_setjmp (c.jmp)) |
1436 | { | |
265a9e55 | 1437 | if (!NILP (h.var)) |
9d58218c RS |
1438 | specbind (h.var, c.val); |
1439 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1440 | |
1441 | /* Note that this just undoes the binding of h.var; whoever | |
1442 | longjumped to us unwound the stack to c.pdlcount before | |
1443 | throwing. */ | |
db9f0278 JB |
1444 | unbind_to (c.pdlcount, Qnil); |
1445 | return val; | |
1446 | } | |
1447 | c.next = catchlist; | |
1448 | catchlist = &c; | |
177c0ea7 | 1449 | |
82da7701 JB |
1450 | h.var = var; |
1451 | h.handler = handlers; | |
db9f0278 | 1452 | h.next = handlerlist; |
db9f0278 JB |
1453 | h.tag = &c; |
1454 | handlerlist = &h; | |
1455 | ||
82da7701 | 1456 | val = Feval (bodyform); |
db9f0278 JB |
1457 | catchlist = c.next; |
1458 | handlerlist = h.next; | |
1459 | return val; | |
1460 | } | |
1461 | ||
f029ca5f RS |
1462 | /* Call the function BFUN with no arguments, catching errors within it |
1463 | according to HANDLERS. If there is an error, call HFUN with | |
1464 | one argument which is the data that describes the error: | |
1465 | (SIGNALNAME . DATA) | |
1466 | ||
1467 | HANDLERS can be a list of conditions to catch. | |
1468 | If HANDLERS is Qt, catch all errors. | |
1469 | If HANDLERS is Qerror, catch all errors | |
1470 | but allow the debugger to run if that is enabled. */ | |
1471 | ||
db9f0278 JB |
1472 | Lisp_Object |
1473 | internal_condition_case (bfun, handlers, hfun) | |
1474 | Lisp_Object (*bfun) (); | |
1475 | Lisp_Object handlers; | |
1476 | Lisp_Object (*hfun) (); | |
1477 | { | |
1478 | Lisp_Object val; | |
1479 | struct catchtag c; | |
1480 | struct handler h; | |
1481 | ||
88019a63 RS |
1482 | /* Since Fsignal will close off all calls to x_catch_errors, |
1483 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1484 | #if HAVE_X_WINDOWS |
88019a63 | 1485 | if (x_catching_errors ()) |
01591d17 | 1486 | abort (); |
a2a103bb | 1487 | #endif |
01591d17 | 1488 | |
db9f0278 JB |
1489 | c.tag = Qnil; |
1490 | c.val = Qnil; | |
1491 | c.backlist = backtrace_list; | |
1492 | c.handlerlist = handlerlist; | |
1493 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1494 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1495 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1496 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1497 | c.gcpro = gcprolist; |
bcf28080 | 1498 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1499 | if (_setjmp (c.jmp)) |
1500 | { | |
9d58218c | 1501 | return (*hfun) (c.val); |
db9f0278 JB |
1502 | } |
1503 | c.next = catchlist; | |
1504 | catchlist = &c; | |
1505 | h.handler = handlers; | |
1506 | h.var = Qnil; | |
db9f0278 JB |
1507 | h.next = handlerlist; |
1508 | h.tag = &c; | |
1509 | handlerlist = &h; | |
1510 | ||
1511 | val = (*bfun) (); | |
1512 | catchlist = c.next; | |
1513 | handlerlist = h.next; | |
1514 | return val; | |
1515 | } | |
1516 | ||
2659a09f | 1517 | /* Like internal_condition_case but call BFUN with ARG as its argument. */ |
f029ca5f | 1518 | |
d227775c RS |
1519 | Lisp_Object |
1520 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1521 | Lisp_Object (*bfun) (); | |
1522 | Lisp_Object arg; | |
1523 | Lisp_Object handlers; | |
1524 | Lisp_Object (*hfun) (); | |
1525 | { | |
1526 | Lisp_Object val; | |
1527 | struct catchtag c; | |
1528 | struct handler h; | |
1529 | ||
88019a63 RS |
1530 | /* Since Fsignal will close off all calls to x_catch_errors, |
1531 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1532 | #if HAVE_X_WINDOWS |
88019a63 RS |
1533 | if (x_catching_errors ()) |
1534 | abort (); | |
a2a103bb | 1535 | #endif |
88019a63 | 1536 | |
d227775c RS |
1537 | c.tag = Qnil; |
1538 | c.val = Qnil; | |
1539 | c.backlist = backtrace_list; | |
1540 | c.handlerlist = handlerlist; | |
1541 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1542 | c.pdlcount = SPECPDL_INDEX (); |
d227775c | 1543 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1544 | c.interrupt_input_blocked = interrupt_input_blocked; |
d227775c | 1545 | c.gcpro = gcprolist; |
bcf28080 | 1546 | c.byte_stack = byte_stack_list; |
d227775c RS |
1547 | if (_setjmp (c.jmp)) |
1548 | { | |
9d58218c | 1549 | return (*hfun) (c.val); |
d227775c RS |
1550 | } |
1551 | c.next = catchlist; | |
1552 | catchlist = &c; | |
1553 | h.handler = handlers; | |
1554 | h.var = Qnil; | |
1555 | h.next = handlerlist; | |
1556 | h.tag = &c; | |
1557 | handlerlist = &h; | |
1558 | ||
1559 | val = (*bfun) (arg); | |
1560 | catchlist = c.next; | |
1561 | handlerlist = h.next; | |
1562 | return val; | |
1563 | } | |
10b29d41 GM |
1564 | |
1565 | ||
2659a09f | 1566 | /* Like internal_condition_case but call BFUN with NARGS as first, |
10b29d41 GM |
1567 | and ARGS as second argument. */ |
1568 | ||
1569 | Lisp_Object | |
1570 | internal_condition_case_2 (bfun, nargs, args, handlers, hfun) | |
1571 | Lisp_Object (*bfun) (); | |
1572 | int nargs; | |
1573 | Lisp_Object *args; | |
1574 | Lisp_Object handlers; | |
1575 | Lisp_Object (*hfun) (); | |
1576 | { | |
1577 | Lisp_Object val; | |
1578 | struct catchtag c; | |
1579 | struct handler h; | |
1580 | ||
88019a63 RS |
1581 | /* Since Fsignal will close off all calls to x_catch_errors, |
1582 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1583 | #if HAVE_X_WINDOWS |
88019a63 RS |
1584 | if (x_catching_errors ()) |
1585 | abort (); | |
a2a103bb | 1586 | #endif |
88019a63 | 1587 | |
10b29d41 GM |
1588 | c.tag = Qnil; |
1589 | c.val = Qnil; | |
1590 | c.backlist = backtrace_list; | |
1591 | c.handlerlist = handlerlist; | |
1592 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1593 | c.pdlcount = SPECPDL_INDEX (); |
10b29d41 | 1594 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1595 | c.interrupt_input_blocked = interrupt_input_blocked; |
10b29d41 GM |
1596 | c.gcpro = gcprolist; |
1597 | c.byte_stack = byte_stack_list; | |
1598 | if (_setjmp (c.jmp)) | |
1599 | { | |
1600 | return (*hfun) (c.val); | |
1601 | } | |
1602 | c.next = catchlist; | |
1603 | catchlist = &c; | |
1604 | h.handler = handlers; | |
1605 | h.var = Qnil; | |
1606 | h.next = handlerlist; | |
1607 | h.tag = &c; | |
1608 | handlerlist = &h; | |
1609 | ||
1610 | val = (*bfun) (nargs, args); | |
1611 | catchlist = c.next; | |
1612 | handlerlist = h.next; | |
1613 | return val; | |
1614 | } | |
1615 | ||
d227775c | 1616 | \f |
2901f1d1 | 1617 | static Lisp_Object find_handler_clause P_ ((Lisp_Object, Lisp_Object, |
f01cbfdd | 1618 | Lisp_Object, Lisp_Object)); |
db9f0278 JB |
1619 | |
1620 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
9dbc9081 PJ |
1621 | doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA. |
1622 | This function does not return. | |
1623 | ||
1624 | An error symbol is a symbol with an `error-conditions' property | |
1625 | that is a list of condition names. | |
1626 | A handler for any of those names will get to handle this signal. | |
1627 | The symbol `error' should normally be one of them. | |
1628 | ||
1629 | DATA should be a list. Its elements are printed as part of the error message. | |
3297ec22 LT |
1630 | See Info anchor `(elisp)Definition of signal' for some details on how this |
1631 | error message is constructed. | |
9dbc9081 PJ |
1632 | If the signal is handled, DATA is made available to the handler. |
1633 | See also the function `condition-case'. */) | |
1634 | (error_symbol, data) | |
4200e719 | 1635 | Lisp_Object error_symbol, data; |
db9f0278 | 1636 | { |
bfa8ca43 | 1637 | /* When memory is full, ERROR-SYMBOL is nil, |
26631f2b RS |
1638 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). |
1639 | That is a special case--don't do this in other situations. */ | |
db9f0278 JB |
1640 | register struct handler *allhandlers = handlerlist; |
1641 | Lisp_Object conditions; | |
1642 | extern int gc_in_progress; | |
1643 | extern int waiting_for_input; | |
c11d3d17 | 1644 | Lisp_Object string; |
1ea9dec4 | 1645 | Lisp_Object real_error_symbol; |
a2ff3819 | 1646 | struct backtrace *bp; |
db9f0278 | 1647 | |
346598f1 | 1648 | immediate_quit = handling_signal = 0; |
d063129f | 1649 | abort_on_gc = 0; |
db9f0278 JB |
1650 | if (gc_in_progress || waiting_for_input) |
1651 | abort (); | |
1652 | ||
1ea9dec4 RS |
1653 | if (NILP (error_symbol)) |
1654 | real_error_symbol = Fcar (data); | |
1655 | else | |
1656 | real_error_symbol = error_symbol; | |
1657 | ||
26631f2b RS |
1658 | #if 0 /* rms: I don't know why this was here, |
1659 | but it is surely wrong for an error that is handled. */ | |
d148e14d | 1660 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
1661 | if (display_hourglass_p) |
1662 | cancel_hourglass (); | |
48f8dfa3 | 1663 | #endif |
177c0ea7 | 1664 | #endif |
48f8dfa3 | 1665 | |
61ede770 | 1666 | /* This hook is used by edebug. */ |
26631f2b RS |
1667 | if (! NILP (Vsignal_hook_function) |
1668 | && ! NILP (error_symbol)) | |
9f5903bb RS |
1669 | { |
1670 | /* Edebug takes care of restoring these variables when it exits. */ | |
1671 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1672 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1673 | ||
1674 | if (SPECPDL_INDEX () + 40 > max_specpdl_size) | |
1675 | max_specpdl_size = SPECPDL_INDEX () + 40; | |
1676 | ||
1677 | call2 (Vsignal_hook_function, error_symbol, data); | |
1678 | } | |
61ede770 | 1679 | |
1ea9dec4 | 1680 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1681 | |
a2ff3819 GM |
1682 | /* Remember from where signal was called. Skip over the frame for |
1683 | `signal' itself. If a frame for `error' follows, skip that, | |
26631f2b RS |
1684 | too. Don't do this when ERROR_SYMBOL is nil, because that |
1685 | is a memory-full error. */ | |
090a072f | 1686 | Vsignaling_function = Qnil; |
26631f2b | 1687 | if (backtrace_list && !NILP (error_symbol)) |
090a072f GM |
1688 | { |
1689 | bp = backtrace_list->next; | |
1690 | if (bp && bp->function && EQ (*bp->function, Qerror)) | |
1691 | bp = bp->next; | |
1692 | if (bp && bp->function) | |
1693 | Vsignaling_function = *bp->function; | |
1694 | } | |
a2ff3819 | 1695 | |
db9f0278 JB |
1696 | for (; handlerlist; handlerlist = handlerlist->next) |
1697 | { | |
1698 | register Lisp_Object clause; | |
177c0ea7 | 1699 | |
db9f0278 | 1700 | clause = find_handler_clause (handlerlist->handler, conditions, |
f01cbfdd | 1701 | error_symbol, data); |
db9f0278 | 1702 | |
db9f0278 | 1703 | if (EQ (clause, Qlambda)) |
82da7701 | 1704 | { |
690337b7 KH |
1705 | /* We can't return values to code which signaled an error, but we |
1706 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1707 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1708 | return Qnil; |
1709 | else | |
d3e6f8be | 1710 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1711 | } |
db9f0278 | 1712 | |
265a9e55 | 1713 | if (!NILP (clause)) |
db9f0278 | 1714 | { |
9d58218c | 1715 | Lisp_Object unwind_data; |
db9f0278 | 1716 | struct handler *h = handlerlist; |
9d58218c | 1717 | |
db9f0278 | 1718 | handlerlist = allhandlers; |
1ea9dec4 RS |
1719 | |
1720 | if (NILP (error_symbol)) | |
1721 | unwind_data = data; | |
9d58218c RS |
1722 | else |
1723 | unwind_data = Fcons (error_symbol, data); | |
1724 | h->chosen_clause = clause; | |
1725 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1726 | } |
1727 | } | |
1728 | ||
1729 | handlerlist = allhandlers; | |
1730 | /* If no handler is present now, try to run the debugger, | |
1731 | and if that fails, throw to top level. */ | |
f01cbfdd | 1732 | find_handler_clause (Qerror, conditions, error_symbol, data); |
c11d3d17 RS |
1733 | if (catchlist != 0) |
1734 | Fthrow (Qtop_level, Qt); | |
1735 | ||
1ea9dec4 | 1736 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1737 | data = Fcons (error_symbol, data); |
1738 | ||
1739 | string = Ferror_message_string (data); | |
d5db4077 | 1740 | fatal ("%s", SDATA (string), 0); |
db9f0278 JB |
1741 | } |
1742 | ||
734d55a2 KS |
1743 | /* Internal version of Fsignal that never returns. |
1744 | Used for anything but Qquit (which can return from Fsignal). */ | |
1745 | ||
1746 | void | |
1747 | xsignal (error_symbol, data) | |
1748 | Lisp_Object error_symbol, data; | |
1749 | { | |
1750 | Fsignal (error_symbol, data); | |
1751 | abort (); | |
1752 | } | |
1753 | ||
1754 | /* Like xsignal, but takes 0, 1, 2, or 3 args instead of a list. */ | |
1755 | ||
1756 | void | |
1757 | xsignal0 (error_symbol) | |
1758 | Lisp_Object error_symbol; | |
1759 | { | |
1760 | xsignal (error_symbol, Qnil); | |
1761 | } | |
1762 | ||
1763 | void | |
1764 | xsignal1 (error_symbol, arg) | |
1765 | Lisp_Object error_symbol, arg; | |
1766 | { | |
1767 | xsignal (error_symbol, list1 (arg)); | |
1768 | } | |
1769 | ||
1770 | void | |
1771 | xsignal2 (error_symbol, arg1, arg2) | |
1772 | Lisp_Object error_symbol, arg1, arg2; | |
1773 | { | |
1774 | xsignal (error_symbol, list2 (arg1, arg2)); | |
1775 | } | |
1776 | ||
1777 | void | |
1778 | xsignal3 (error_symbol, arg1, arg2, arg3) | |
1779 | Lisp_Object error_symbol, arg1, arg2, arg3; | |
1780 | { | |
1781 | xsignal (error_symbol, list3 (arg1, arg2, arg3)); | |
1782 | } | |
1783 | ||
1784 | /* Signal `error' with message S, and additional arg ARG. | |
1785 | If ARG is not a genuine list, make it a one-element list. */ | |
1786 | ||
1787 | void | |
1788 | signal_error (s, arg) | |
1789 | char *s; | |
1790 | Lisp_Object arg; | |
1791 | { | |
1792 | Lisp_Object tortoise, hare; | |
1793 | ||
1794 | hare = tortoise = arg; | |
1795 | while (CONSP (hare)) | |
1796 | { | |
1797 | hare = XCDR (hare); | |
1798 | if (!CONSP (hare)) | |
1799 | break; | |
1800 | ||
1801 | hare = XCDR (hare); | |
1802 | tortoise = XCDR (tortoise); | |
1803 | ||
1804 | if (EQ (hare, tortoise)) | |
1805 | break; | |
1806 | } | |
1807 | ||
1808 | if (!NILP (hare)) | |
1809 | arg = Fcons (arg, Qnil); /* Make it a list. */ | |
1810 | ||
1811 | xsignal (Qerror, Fcons (build_string (s), arg)); | |
1812 | } | |
1813 | ||
1814 | ||
e0f24100 | 1815 | /* Return nonzero if LIST is a non-nil atom or |
128c0f66 RM |
1816 | a list containing one of CONDITIONS. */ |
1817 | ||
1818 | static int | |
1819 | wants_debugger (list, conditions) | |
1820 | Lisp_Object list, conditions; | |
1821 | { | |
4de86b16 | 1822 | if (NILP (list)) |
128c0f66 RM |
1823 | return 0; |
1824 | if (! CONSP (list)) | |
1825 | return 1; | |
1826 | ||
ab67260b | 1827 | while (CONSP (conditions)) |
128c0f66 | 1828 | { |
ab67260b | 1829 | Lisp_Object this, tail; |
03699b14 KR |
1830 | this = XCAR (conditions); |
1831 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1832 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1833 | return 1; |
03699b14 | 1834 | conditions = XCDR (conditions); |
128c0f66 | 1835 | } |
ab67260b | 1836 | return 0; |
128c0f66 RM |
1837 | } |
1838 | ||
fc950e09 KH |
1839 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1840 | and described by SIGNAL-DATA, should skip the debugger | |
1b1acc13 | 1841 | according to debugger-ignored-errors. */ |
fc950e09 KH |
1842 | |
1843 | static int | |
1844 | skip_debugger (conditions, data) | |
1845 | Lisp_Object conditions, data; | |
1846 | { | |
1847 | Lisp_Object tail; | |
1848 | int first_string = 1; | |
1849 | Lisp_Object error_message; | |
1850 | ||
17401c97 GM |
1851 | error_message = Qnil; |
1852 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1853 | { |
03699b14 | 1854 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1855 | { |
1856 | if (first_string) | |
1857 | { | |
1858 | error_message = Ferror_message_string (data); | |
1859 | first_string = 0; | |
1860 | } | |
177c0ea7 | 1861 | |
03699b14 | 1862 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1863 | return 1; |
1864 | } | |
1865 | else | |
1866 | { | |
1867 | Lisp_Object contail; | |
1868 | ||
17401c97 | 1869 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1870 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1871 | return 1; |
1872 | } | |
1873 | } | |
1874 | ||
1875 | return 0; | |
1876 | } | |
1877 | ||
ddaa36e1 AS |
1878 | /* Call the debugger if calling it is currently enabled for CONDITIONS. |
1879 | SIG and DATA describe the signal, as in find_handler_clause. */ | |
1880 | ||
1881 | static int | |
1882 | maybe_call_debugger (conditions, sig, data) | |
1883 | Lisp_Object conditions, sig, data; | |
1884 | { | |
1885 | Lisp_Object combined_data; | |
1886 | ||
1887 | combined_data = Fcons (sig, data); | |
1888 | ||
1889 | if ( | |
1890 | /* Don't try to run the debugger with interrupts blocked. | |
1891 | The editing loop would return anyway. */ | |
1892 | ! INPUT_BLOCKED_P | |
1893 | /* Does user want to enter debugger for this kind of error? */ | |
1894 | && (EQ (sig, Qquit) | |
1895 | ? debug_on_quit | |
1896 | : wants_debugger (Vdebug_on_error, conditions)) | |
1897 | && ! skip_debugger (conditions, combined_data) | |
1898 | /* rms: what's this for? */ | |
1899 | && when_entered_debugger < num_nonmacro_input_events) | |
1900 | { | |
1901 | call_debugger (Fcons (Qerror, Fcons (combined_data, Qnil))); | |
1902 | return 1; | |
1903 | } | |
1904 | ||
1905 | return 0; | |
1906 | } | |
1907 | ||
128c0f66 | 1908 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1909 | There are two ways to pass SIG and DATA: |
9b942ebd | 1910 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1911 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1912 | This is for memory-full errors only. |
1ea9dec4 | 1913 | |
9f5903bb RS |
1914 | We need to increase max_specpdl_size temporarily around |
1915 | anything we do that can push on the specpdl, so as not to get | |
1916 | a second error here in case we're handling specpdl overflow. */ | |
db9f0278 JB |
1917 | |
1918 | static Lisp_Object | |
f01cbfdd | 1919 | find_handler_clause (handlers, conditions, sig, data) |
db9f0278 | 1920 | Lisp_Object handlers, conditions, sig, data; |
db9f0278 JB |
1921 | { |
1922 | register Lisp_Object h; | |
1923 | register Lisp_Object tem; | |
f01cbfdd RS |
1924 | int debugger_called = 0; |
1925 | int debugger_considered = 0; | |
db9f0278 | 1926 | |
f01cbfdd RS |
1927 | /* t is used by handlers for all conditions, set up by C code. */ |
1928 | if (EQ (handlers, Qt)) | |
db9f0278 | 1929 | return Qt; |
f01cbfdd RS |
1930 | |
1931 | /* Don't run the debugger for a memory-full error. | |
1932 | (There is no room in memory to do that!) */ | |
1933 | if (NILP (sig)) | |
1934 | debugger_considered = 1; | |
1935 | ||
61ede770 RS |
1936 | /* error is used similarly, but means print an error message |
1937 | and run the debugger if that is enabled. */ | |
1938 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1939 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1940 | there is a handler. */ | |
db9f0278 | 1941 | { |
f01cbfdd | 1942 | if (!NILP (sig) && wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b | 1943 | { |
48ce8ca7 | 1944 | max_lisp_eval_depth += 15; |
9f5903bb | 1945 | max_specpdl_size++; |
48ce8ca7 | 1946 | #ifdef PROTOTYPES |
88817f3b RS |
1947 | internal_with_output_to_temp_buffer ("*Backtrace*", |
1948 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1949 | Qnil); | |
48ce8ca7 | 1950 | #else |
88817f3b RS |
1951 | internal_with_output_to_temp_buffer ("*Backtrace*", |
1952 | Fbacktrace, Qnil); | |
48ce8ca7 | 1953 | #endif |
9f5903bb | 1954 | max_specpdl_size--; |
48ce8ca7 | 1955 | max_lisp_eval_depth -= 15; |
88817f3b | 1956 | } |
f01cbfdd RS |
1957 | |
1958 | if (!debugger_considered) | |
db9f0278 | 1959 | { |
f01cbfdd RS |
1960 | debugger_considered = 1; |
1961 | debugger_called = maybe_call_debugger (conditions, sig, data); | |
61ede770 | 1962 | } |
f01cbfdd | 1963 | |
61ede770 RS |
1964 | /* If there is no handler, return saying whether we ran the debugger. */ |
1965 | if (EQ (handlers, Qerror)) | |
1966 | { | |
1967 | if (debugger_called) | |
9f5903bb | 1968 | return Qlambda; |
61ede770 | 1969 | return Qt; |
db9f0278 | 1970 | } |
db9f0278 | 1971 | } |
f01cbfdd | 1972 | |
db9f0278 JB |
1973 | for (h = handlers; CONSP (h); h = Fcdr (h)) |
1974 | { | |
5f96776a RS |
1975 | Lisp_Object handler, condit; |
1976 | ||
1977 | handler = Fcar (h); | |
1978 | if (!CONSP (handler)) | |
db9f0278 | 1979 | continue; |
5f96776a RS |
1980 | condit = Fcar (handler); |
1981 | /* Handle a single condition name in handler HANDLER. */ | |
1982 | if (SYMBOLP (condit)) | |
1983 | { | |
1984 | tem = Fmemq (Fcar (handler), conditions); | |
1985 | if (!NILP (tem)) | |
1986 | return handler; | |
1987 | } | |
1988 | /* Handle a list of condition names in handler HANDLER. */ | |
1989 | else if (CONSP (condit)) | |
1990 | { | |
f01cbfdd RS |
1991 | Lisp_Object tail; |
1992 | for (tail = condit; CONSP (tail); tail = XCDR (tail)) | |
5f96776a | 1993 | { |
f01cbfdd | 1994 | tem = Fmemq (Fcar (tail), conditions); |
5f96776a | 1995 | if (!NILP (tem)) |
f01cbfdd RS |
1996 | { |
1997 | /* This handler is going to apply. | |
1998 | Does it allow the debugger to run first? */ | |
1999 | if (! debugger_considered && !NILP (Fmemq (Qdebug, condit))) | |
2000 | maybe_call_debugger (conditions, sig, data); | |
2001 | return handler; | |
2002 | } | |
5f96776a RS |
2003 | } |
2004 | } | |
db9f0278 | 2005 | } |
f01cbfdd | 2006 | |
db9f0278 JB |
2007 | return Qnil; |
2008 | } | |
2009 | ||
2010 | /* dump an error message; called like printf */ | |
2011 | ||
2012 | /* VARARGS 1 */ | |
2013 | void | |
2014 | error (m, a1, a2, a3) | |
2015 | char *m; | |
9125da08 | 2016 | char *a1, *a2, *a3; |
db9f0278 JB |
2017 | { |
2018 | char buf[200]; | |
9125da08 RS |
2019 | int size = 200; |
2020 | int mlen; | |
2021 | char *buffer = buf; | |
2022 | char *args[3]; | |
2023 | int allocated = 0; | |
2024 | Lisp_Object string; | |
2025 | ||
2026 | args[0] = a1; | |
2027 | args[1] = a2; | |
2028 | args[2] = a3; | |
2029 | ||
2030 | mlen = strlen (m); | |
db9f0278 JB |
2031 | |
2032 | while (1) | |
9125da08 | 2033 | { |
955f3ff9 | 2034 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
2035 | if (used < size) |
2036 | break; | |
2037 | size *= 2; | |
2038 | if (allocated) | |
2039 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
2040 | else |
2041 | { | |
2042 | buffer = (char *) xmalloc (size); | |
2043 | allocated = 1; | |
2044 | } | |
9125da08 RS |
2045 | } |
2046 | ||
955f3ff9 | 2047 | string = build_string (buffer); |
9125da08 | 2048 | if (allocated) |
9ae6734f | 2049 | xfree (buffer); |
9125da08 | 2050 | |
734d55a2 | 2051 | xsignal1 (Qerror, string); |
db9f0278 JB |
2052 | } |
2053 | \f | |
e72706be | 2054 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 2, 0, |
9dbc9081 PJ |
2055 | doc: /* Non-nil if FUNCTION makes provisions for interactive calling. |
2056 | This means it contains a description for how to read arguments to give it. | |
2057 | The value is nil for an invalid function or a symbol with no function | |
2058 | definition. | |
2059 | ||
2060 | Interactively callable functions include strings and vectors (treated | |
2061 | as keyboard macros), lambda-expressions that contain a top-level call | |
2062 | to `interactive', autoload definitions made by `autoload' with non-nil | |
2063 | fourth argument, and some of the built-in functions of Lisp. | |
2064 | ||
e72706be RS |
2065 | Also, a symbol satisfies `commandp' if its function definition does so. |
2066 | ||
2067 | If the optional argument FOR-CALL-INTERACTIVELY is non-nil, | |
769b4fb2 | 2068 | then strings and vectors are not accepted. */) |
e72706be RS |
2069 | (function, for_call_interactively) |
2070 | Lisp_Object function, for_call_interactively; | |
db9f0278 JB |
2071 | { |
2072 | register Lisp_Object fun; | |
2073 | register Lisp_Object funcar; | |
52b71f49 | 2074 | Lisp_Object if_prop = Qnil; |
db9f0278 JB |
2075 | |
2076 | fun = function; | |
2077 | ||
52b71f49 SM |
2078 | fun = indirect_function (fun); /* Check cycles. */ |
2079 | if (NILP (fun) || EQ (fun, Qunbound)) | |
ffd56f97 | 2080 | return Qnil; |
db9f0278 | 2081 | |
52b71f49 SM |
2082 | /* Check an `interactive-form' property if present, analogous to the |
2083 | function-documentation property. */ | |
2084 | fun = function; | |
2085 | while (SYMBOLP (fun)) | |
2086 | { | |
2087 | Lisp_Object tmp = Fget (fun, intern ("interactive-form")); | |
2088 | if (!NILP (tmp)) | |
2089 | if_prop = Qt; | |
2090 | fun = Fsymbol_function (fun); | |
2091 | } | |
2092 | ||
db9f0278 JB |
2093 | /* Emacs primitives are interactive if their DEFUN specifies an |
2094 | interactive spec. */ | |
90165123 | 2095 | if (SUBRP (fun)) |
04724b69 | 2096 | return XSUBR (fun)->intspec ? Qt : if_prop; |
db9f0278 JB |
2097 | |
2098 | /* Bytecode objects are interactive if they are long enough to | |
2099 | have an element whose index is COMPILED_INTERACTIVE, which is | |
2100 | where the interactive spec is stored. */ | |
90165123 | 2101 | else if (COMPILEDP (fun)) |
845975f5 | 2102 | return ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
52b71f49 | 2103 | ? Qt : if_prop); |
db9f0278 JB |
2104 | |
2105 | /* Strings and vectors are keyboard macros. */ | |
52b71f49 | 2106 | if (STRINGP (fun) || VECTORP (fun)) |
6e33efc4 | 2107 | return (NILP (for_call_interactively) ? Qt : Qnil); |
db9f0278 JB |
2108 | |
2109 | /* Lists may represent commands. */ | |
2110 | if (!CONSP (fun)) | |
2111 | return Qnil; | |
ed16fb98 | 2112 | funcar = XCAR (fun); |
db9f0278 | 2113 | if (EQ (funcar, Qlambda)) |
52b71f49 | 2114 | return !NILP (Fassq (Qinteractive, Fcdr (XCDR (fun)))) ? Qt : if_prop; |
db9f0278 | 2115 | if (EQ (funcar, Qautoload)) |
52b71f49 | 2116 | return !NILP (Fcar (Fcdr (Fcdr (XCDR (fun))))) ? Qt : if_prop; |
db9f0278 JB |
2117 | else |
2118 | return Qnil; | |
2119 | } | |
2120 | ||
2121 | /* ARGSUSED */ | |
2122 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, | |
9dbc9081 PJ |
2123 | doc: /* Define FUNCTION to autoload from FILE. |
2124 | FUNCTION is a symbol; FILE is a file name string to pass to `load'. | |
2125 | Third arg DOCSTRING is documentation for the function. | |
2126 | Fourth arg INTERACTIVE if non-nil says function can be called interactively. | |
2127 | Fifth arg TYPE indicates the type of the object: | |
2128 | nil or omitted says FUNCTION is a function, | |
2129 | `keymap' says FUNCTION is really a keymap, and | |
2130 | `macro' or t says FUNCTION is really a macro. | |
2131 | Third through fifth args give info about the real definition. | |
2132 | They default to nil. | |
2133 | If FUNCTION is already defined other than as an autoload, | |
2134 | this does nothing and returns nil. */) | |
2135 | (function, file, docstring, interactive, type) | |
ee9ee63c | 2136 | Lisp_Object function, file, docstring, interactive, type; |
db9f0278 JB |
2137 | { |
2138 | #ifdef NO_ARG_ARRAY | |
2139 | Lisp_Object args[4]; | |
2140 | #endif | |
2141 | ||
b7826503 PJ |
2142 | CHECK_SYMBOL (function); |
2143 | CHECK_STRING (file); | |
db9f0278 JB |
2144 | |
2145 | /* If function is defined and not as an autoload, don't override */ | |
2146 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 2147 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 2148 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
2149 | return Qnil; |
2150 | ||
7973e637 SM |
2151 | if (NILP (Vpurify_flag)) |
2152 | /* Only add entries after dumping, because the ones before are | |
2153 | not useful and else we get loads of them from the loaddefs.el. */ | |
2154 | LOADHIST_ATTACH (Fcons (Qautoload, function)); | |
2155 | ||
db9f0278 JB |
2156 | #ifdef NO_ARG_ARRAY |
2157 | args[0] = file; | |
2158 | args[1] = docstring; | |
2159 | args[2] = interactive; | |
ee9ee63c | 2160 | args[3] = type; |
db9f0278 JB |
2161 | |
2162 | return Ffset (function, Fcons (Qautoload, Flist (4, &args[0]))); | |
2163 | #else /* NO_ARG_ARRAY */ | |
2164 | return Ffset (function, Fcons (Qautoload, Flist (4, &file))); | |
2165 | #endif /* not NO_ARG_ARRAY */ | |
2166 | } | |
2167 | ||
2168 | Lisp_Object | |
2169 | un_autoload (oldqueue) | |
2170 | Lisp_Object oldqueue; | |
2171 | { | |
2172 | register Lisp_Object queue, first, second; | |
2173 | ||
2174 | /* Queue to unwind is current value of Vautoload_queue. | |
2175 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
2176 | queue = Vautoload_queue; | |
2177 | Vautoload_queue = oldqueue; | |
2178 | while (CONSP (queue)) | |
2179 | { | |
e509f168 | 2180 | first = XCAR (queue); |
db9f0278 JB |
2181 | second = Fcdr (first); |
2182 | first = Fcar (first); | |
47b82df9 RS |
2183 | if (EQ (first, make_number (0))) |
2184 | Vfeatures = second; | |
db9f0278 JB |
2185 | else |
2186 | Ffset (first, second); | |
e509f168 | 2187 | queue = XCDR (queue); |
db9f0278 JB |
2188 | } |
2189 | return Qnil; | |
2190 | } | |
2191 | ||
ca20916b RS |
2192 | /* Load an autoloaded function. |
2193 | FUNNAME is the symbol which is the function's name. | |
2194 | FUNDEF is the autoload definition (a list). */ | |
2195 | ||
045ba794 | 2196 | void |
db9f0278 JB |
2197 | do_autoload (fundef, funname) |
2198 | Lisp_Object fundef, funname; | |
2199 | { | |
aed13378 | 2200 | int count = SPECPDL_INDEX (); |
d945992e | 2201 | Lisp_Object fun; |
ca20916b | 2202 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 | 2203 | |
aea6173f RS |
2204 | /* This is to make sure that loadup.el gives a clear picture |
2205 | of what files are preloaded and when. */ | |
ab4db096 RS |
2206 | if (! NILP (Vpurify_flag)) |
2207 | error ("Attempt to autoload %s while preparing to dump", | |
d5db4077 | 2208 | SDATA (SYMBOL_NAME (funname))); |
ab4db096 | 2209 | |
db9f0278 | 2210 | fun = funname; |
b7826503 | 2211 | CHECK_SYMBOL (funname); |
ca20916b | 2212 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 2213 | |
f87740dc | 2214 | /* Preserve the match data. */ |
89f2614d | 2215 | record_unwind_save_match_data (); |
177c0ea7 | 2216 | |
a04ee161 RS |
2217 | /* If autoloading gets an error (which includes the error of failing |
2218 | to define the function being called), we use Vautoload_queue | |
2219 | to undo function definitions and `provide' calls made by | |
2220 | the function. We do this in the specific case of autoloading | |
2221 | because autoloading is not an explicit request "load this file", | |
2222 | but rather a request to "call this function". | |
2223 | ||
2224 | The value saved here is to be restored into Vautoload_queue. */ | |
db9f0278 JB |
2225 | record_unwind_protect (un_autoload, Vautoload_queue); |
2226 | Vautoload_queue = Qt; | |
7351b242 | 2227 | Fload (Fcar (Fcdr (fundef)), Qnil, Qt, Qnil, Qt); |
2a49b6e5 | 2228 | |
db9f0278 JB |
2229 | /* Once loading finishes, don't undo it. */ |
2230 | Vautoload_queue = Qt; | |
2231 | unbind_to (count, Qnil); | |
2232 | ||
a7f96a35 | 2233 | fun = Findirect_function (fun, Qnil); |
ffd56f97 | 2234 | |
76c2b0cc | 2235 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 | 2236 | error ("Autoloading failed to define function %s", |
d5db4077 | 2237 | SDATA (SYMBOL_NAME (funname))); |
ca20916b | 2238 | UNGCPRO; |
db9f0278 | 2239 | } |
4c576a83 | 2240 | |
db9f0278 JB |
2241 | \f |
2242 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
9dbc9081 PJ |
2243 | doc: /* Evaluate FORM and return its value. */) |
2244 | (form) | |
db9f0278 JB |
2245 | Lisp_Object form; |
2246 | { | |
2247 | Lisp_Object fun, val, original_fun, original_args; | |
2248 | Lisp_Object funcar; | |
2249 | struct backtrace backtrace; | |
2250 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2251 | ||
df470e3b | 2252 | if (handling_signal) |
48f8dfa3 | 2253 | abort (); |
177c0ea7 | 2254 | |
90165123 | 2255 | if (SYMBOLP (form)) |
2b9bde76 | 2256 | return Fsymbol_value (form); |
db9f0278 JB |
2257 | if (!CONSP (form)) |
2258 | return form; | |
2259 | ||
2260 | QUIT; | |
ee830945 RS |
2261 | if ((consing_since_gc > gc_cons_threshold |
2262 | && consing_since_gc > gc_relative_threshold) | |
2263 | || | |
2264 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
db9f0278 JB |
2265 | { |
2266 | GCPRO1 (form); | |
2267 | Fgarbage_collect (); | |
2268 | UNGCPRO; | |
2269 | } | |
2270 | ||
2271 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2272 | { | |
2273 | if (max_lisp_eval_depth < 100) | |
2274 | max_lisp_eval_depth = 100; | |
2275 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2276 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2277 | } |
2278 | ||
2279 | original_fun = Fcar (form); | |
2280 | original_args = Fcdr (form); | |
2281 | ||
2282 | backtrace.next = backtrace_list; | |
2283 | backtrace_list = &backtrace; | |
2284 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
2285 | backtrace.args = &original_args; | |
2286 | backtrace.nargs = UNEVALLED; | |
2287 | backtrace.evalargs = 1; | |
2288 | backtrace.debug_on_exit = 0; | |
2289 | ||
2290 | if (debug_on_next_call) | |
2291 | do_debug_on_call (Qt); | |
2292 | ||
2293 | /* At this point, only original_fun and original_args | |
2294 | have values that will be used below */ | |
2295 | retry: | |
8788120f KS |
2296 | |
2297 | /* Optimize for no indirection. */ | |
2298 | fun = original_fun; | |
2299 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2300 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2301 | fun = indirect_function (fun); | |
db9f0278 | 2302 | |
90165123 | 2303 | if (SUBRP (fun)) |
db9f0278 JB |
2304 | { |
2305 | Lisp_Object numargs; | |
166c822d | 2306 | Lisp_Object argvals[8]; |
db9f0278 JB |
2307 | Lisp_Object args_left; |
2308 | register int i, maxargs; | |
2309 | ||
2310 | args_left = original_args; | |
2311 | numargs = Flength (args_left); | |
2312 | ||
c1788fbc RS |
2313 | CHECK_CONS_LIST (); |
2314 | ||
db9f0278 JB |
2315 | if (XINT (numargs) < XSUBR (fun)->min_args || |
2316 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
734d55a2 | 2317 | xsignal2 (Qwrong_number_of_arguments, original_fun, numargs); |
db9f0278 JB |
2318 | |
2319 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2320 | { | |
2321 | backtrace.evalargs = 0; | |
2322 | val = (*XSUBR (fun)->function) (args_left); | |
2323 | goto done; | |
2324 | } | |
2325 | ||
2326 | if (XSUBR (fun)->max_args == MANY) | |
2327 | { | |
2328 | /* Pass a vector of evaluated arguments */ | |
2329 | Lisp_Object *vals; | |
2330 | register int argnum = 0; | |
2331 | ||
2332 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2333 | ||
2334 | GCPRO3 (args_left, fun, fun); | |
2335 | gcpro3.var = vals; | |
2336 | gcpro3.nvars = 0; | |
2337 | ||
265a9e55 | 2338 | while (!NILP (args_left)) |
db9f0278 JB |
2339 | { |
2340 | vals[argnum++] = Feval (Fcar (args_left)); | |
2341 | args_left = Fcdr (args_left); | |
2342 | gcpro3.nvars = argnum; | |
2343 | } | |
db9f0278 JB |
2344 | |
2345 | backtrace.args = vals; | |
2346 | backtrace.nargs = XINT (numargs); | |
2347 | ||
2348 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 2349 | UNGCPRO; |
db9f0278 JB |
2350 | goto done; |
2351 | } | |
2352 | ||
2353 | GCPRO3 (args_left, fun, fun); | |
2354 | gcpro3.var = argvals; | |
2355 | gcpro3.nvars = 0; | |
2356 | ||
2357 | maxargs = XSUBR (fun)->max_args; | |
2358 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
2359 | { | |
2360 | argvals[i] = Feval (Fcar (args_left)); | |
2361 | gcpro3.nvars = ++i; | |
2362 | } | |
2363 | ||
2364 | UNGCPRO; | |
2365 | ||
2366 | backtrace.args = argvals; | |
2367 | backtrace.nargs = XINT (numargs); | |
2368 | ||
2369 | switch (i) | |
2370 | { | |
2371 | case 0: | |
2372 | val = (*XSUBR (fun)->function) (); | |
2373 | goto done; | |
2374 | case 1: | |
2375 | val = (*XSUBR (fun)->function) (argvals[0]); | |
2376 | goto done; | |
2377 | case 2: | |
2378 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
2379 | goto done; | |
2380 | case 3: | |
2381 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2382 | argvals[2]); | |
2383 | goto done; | |
2384 | case 4: | |
2385 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2386 | argvals[2], argvals[3]); | |
2387 | goto done; | |
2388 | case 5: | |
2389 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2390 | argvals[3], argvals[4]); | |
2391 | goto done; | |
2392 | case 6: | |
2393 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2394 | argvals[3], argvals[4], argvals[5]); | |
2395 | goto done; | |
15c65264 RS |
2396 | case 7: |
2397 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2398 | argvals[3], argvals[4], argvals[5], | |
2399 | argvals[6]); | |
2400 | goto done; | |
db9f0278 | 2401 | |
166c822d KH |
2402 | case 8: |
2403 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2404 | argvals[3], argvals[4], argvals[5], | |
2405 | argvals[6], argvals[7]); | |
2406 | goto done; | |
2407 | ||
db9f0278 | 2408 | default: |
08564963 JB |
2409 | /* Someone has created a subr that takes more arguments than |
2410 | is supported by this code. We need to either rewrite the | |
2411 | subr to use a different argument protocol, or add more | |
2412 | cases to this switch. */ | |
2413 | abort (); | |
db9f0278 JB |
2414 | } |
2415 | } | |
90165123 | 2416 | if (COMPILEDP (fun)) |
db9f0278 JB |
2417 | val = apply_lambda (fun, original_args, 1); |
2418 | else | |
2419 | { | |
8788120f | 2420 | if (EQ (fun, Qunbound)) |
734d55a2 | 2421 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 2422 | if (!CONSP (fun)) |
734d55a2 KS |
2423 | xsignal1 (Qinvalid_function, original_fun); |
2424 | funcar = XCAR (fun); | |
90165123 | 2425 | if (!SYMBOLP (funcar)) |
734d55a2 | 2426 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2427 | if (EQ (funcar, Qautoload)) |
2428 | { | |
2429 | do_autoload (fun, original_fun); | |
2430 | goto retry; | |
2431 | } | |
2432 | if (EQ (funcar, Qmacro)) | |
2433 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
2434 | else if (EQ (funcar, Qlambda)) | |
2435 | val = apply_lambda (fun, original_args, 1); | |
db9f0278 | 2436 | else |
734d55a2 | 2437 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2438 | } |
2439 | done: | |
c1788fbc RS |
2440 | CHECK_CONS_LIST (); |
2441 | ||
db9f0278 JB |
2442 | lisp_eval_depth--; |
2443 | if (backtrace.debug_on_exit) | |
2444 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2445 | backtrace_list = backtrace.next; | |
824eb35e | 2446 | |
db9f0278 JB |
2447 | return val; |
2448 | } | |
2449 | \f | |
2450 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
9dbc9081 PJ |
2451 | doc: /* Call FUNCTION with our remaining args, using our last arg as list of args. |
2452 | Then return the value FUNCTION returns. | |
2453 | Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
2454 | usage: (apply FUNCTION &rest ARGUMENTS) */) | |
2455 | (nargs, args) | |
db9f0278 JB |
2456 | int nargs; |
2457 | Lisp_Object *args; | |
2458 | { | |
2459 | register int i, numargs; | |
2460 | register Lisp_Object spread_arg; | |
2461 | register Lisp_Object *funcall_args; | |
db9f0278 | 2462 | Lisp_Object fun; |
96d44c64 | 2463 | struct gcpro gcpro1; |
db9f0278 JB |
2464 | |
2465 | fun = args [0]; | |
2466 | funcall_args = 0; | |
2467 | spread_arg = args [nargs - 1]; | |
b7826503 | 2468 | CHECK_LIST (spread_arg); |
177c0ea7 | 2469 | |
db9f0278 JB |
2470 | numargs = XINT (Flength (spread_arg)); |
2471 | ||
2472 | if (numargs == 0) | |
2473 | return Ffuncall (nargs - 1, args); | |
2474 | else if (numargs == 1) | |
2475 | { | |
03699b14 | 2476 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2477 | return Ffuncall (nargs, args); |
2478 | } | |
2479 | ||
a6e3fa71 | 2480 | numargs += nargs - 2; |
db9f0278 | 2481 | |
8788120f KS |
2482 | /* Optimize for no indirection. */ |
2483 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2484 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2485 | fun = indirect_function (fun); | |
ffd56f97 | 2486 | if (EQ (fun, Qunbound)) |
db9f0278 | 2487 | { |
ffd56f97 JB |
2488 | /* Let funcall get the error */ |
2489 | fun = args[0]; | |
2490 | goto funcall; | |
db9f0278 JB |
2491 | } |
2492 | ||
90165123 | 2493 | if (SUBRP (fun)) |
db9f0278 JB |
2494 | { |
2495 | if (numargs < XSUBR (fun)->min_args | |
2496 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2497 | goto funcall; /* Let funcall get the error */ | |
2498 | else if (XSUBR (fun)->max_args > numargs) | |
2499 | { | |
2500 | /* Avoid making funcall cons up a yet another new vector of arguments | |
2501 | by explicitly supplying nil's for optional values */ | |
2502 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
2503 | * sizeof (Lisp_Object)); | |
2504 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
2505 | funcall_args[++i] = Qnil; | |
96d44c64 SM |
2506 | GCPRO1 (*funcall_args); |
2507 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2508 | } |
2509 | } | |
2510 | funcall: | |
2511 | /* We add 1 to numargs because funcall_args includes the | |
2512 | function itself as well as its arguments. */ | |
2513 | if (!funcall_args) | |
a6e3fa71 JB |
2514 | { |
2515 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
2516 | * sizeof (Lisp_Object)); | |
96d44c64 SM |
2517 | GCPRO1 (*funcall_args); |
2518 | gcpro1.nvars = 1 + numargs; | |
a6e3fa71 JB |
2519 | } |
2520 | ||
db9f0278 JB |
2521 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
2522 | /* Spread the last arg we got. Its first element goes in | |
2523 | the slot that it used to occupy, hence this value of I. */ | |
2524 | i = nargs - 1; | |
265a9e55 | 2525 | while (!NILP (spread_arg)) |
db9f0278 | 2526 | { |
03699b14 KR |
2527 | funcall_args [i++] = XCAR (spread_arg); |
2528 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2529 | } |
a6e3fa71 | 2530 | |
96d44c64 SM |
2531 | /* By convention, the caller needs to gcpro Ffuncall's args. */ |
2532 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
2533 | } |
2534 | \f | |
ff936e53 SM |
2535 | /* Run hook variables in various ways. */ |
2536 | ||
2537 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2901f1d1 SM |
2538 | static Lisp_Object run_hook_with_args P_ ((int, Lisp_Object *, |
2539 | enum run_hooks_condition)); | |
ff936e53 | 2540 | |
8b5176cd | 2541 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
9f685258 | 2542 | doc: /* Run each hook in HOOKS. |
9dbc9081 PJ |
2543 | Each argument should be a symbol, a hook variable. |
2544 | These symbols are processed in the order specified. | |
2545 | If a hook symbol has a non-nil value, that value may be a function | |
2546 | or a list of functions to be called to run the hook. | |
2547 | If the value is a function, it is called with no arguments. | |
2548 | If it is a list, the elements are called, in order, with no arguments. | |
2549 | ||
9f685258 LK |
2550 | Major modes should not use this function directly to run their mode |
2551 | hook; they should use `run-mode-hooks' instead. | |
2552 | ||
72e85d5d RS |
2553 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2554 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2555 | usage: (run-hooks &rest HOOKS) */) |
2556 | (nargs, args) | |
ff936e53 SM |
2557 | int nargs; |
2558 | Lisp_Object *args; | |
2559 | { | |
2560 | Lisp_Object hook[1]; | |
2561 | register int i; | |
2562 | ||
2563 | for (i = 0; i < nargs; i++) | |
2564 | { | |
2565 | hook[0] = args[i]; | |
2566 | run_hook_with_args (1, hook, to_completion); | |
2567 | } | |
2568 | ||
2569 | return Qnil; | |
2570 | } | |
177c0ea7 | 2571 | |
a0d76c27 | 2572 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
9dbc9081 PJ |
2573 | Srun_hook_with_args, 1, MANY, 0, |
2574 | doc: /* Run HOOK with the specified arguments ARGS. | |
2575 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
2576 | value, that value may be a function or a list of functions to be | |
2577 | called to run the hook. If the value is a function, it is called with | |
2578 | the given arguments and its return value is returned. If it is a list | |
2579 | of functions, those functions are called, in order, | |
2580 | with the given arguments ARGS. | |
d5e2c90c | 2581 | It is best not to depend on the value returned by `run-hook-with-args', |
9dbc9081 PJ |
2582 | as that may change. |
2583 | ||
72e85d5d RS |
2584 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2585 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2586 | usage: (run-hook-with-args HOOK &rest ARGS) */) |
2587 | (nargs, args) | |
ff936e53 SM |
2588 | int nargs; |
2589 | Lisp_Object *args; | |
2590 | { | |
2591 | return run_hook_with_args (nargs, args, to_completion); | |
2592 | } | |
2593 | ||
a0d76c27 | 2594 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
9dbc9081 PJ |
2595 | Srun_hook_with_args_until_success, 1, MANY, 0, |
2596 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2597 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2598 | value, that value may be a function or a list of functions to be | |
2599 | called to run the hook. If the value is a function, it is called with | |
2600 | the given arguments and its return value is returned. | |
2601 | If it is a list of functions, those functions are called, in order, | |
2602 | with the given arguments ARGS, until one of them | |
9dbc9081 | 2603 | returns a non-nil value. Then we return that value. |
d5e2c90c | 2604 | However, if they all return nil, we return nil. |
9dbc9081 | 2605 | |
72e85d5d RS |
2606 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2607 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2608 | usage: (run-hook-with-args-until-success HOOK &rest ARGS) */) |
2609 | (nargs, args) | |
b0b667cb KH |
2610 | int nargs; |
2611 | Lisp_Object *args; | |
2612 | { | |
ff936e53 SM |
2613 | return run_hook_with_args (nargs, args, until_success); |
2614 | } | |
2615 | ||
a0d76c27 | 2616 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
9dbc9081 PJ |
2617 | Srun_hook_with_args_until_failure, 1, MANY, 0, |
2618 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2619 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2620 | value, that value may be a function or a list of functions to be | |
2621 | called to run the hook. If the value is a function, it is called with | |
2622 | the given arguments and its return value is returned. | |
2623 | If it is a list of functions, those functions are called, in order, | |
2624 | with the given arguments ARGS, until one of them returns nil. | |
2625 | Then we return nil. However, if they all return non-nil, we return non-nil. | |
9dbc9081 | 2626 | |
72e85d5d RS |
2627 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2628 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2629 | usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */) |
2630 | (nargs, args) | |
ff936e53 SM |
2631 | int nargs; |
2632 | Lisp_Object *args; | |
2633 | { | |
2634 | return run_hook_with_args (nargs, args, until_failure); | |
2635 | } | |
2636 | ||
c933ea05 RS |
2637 | /* ARGS[0] should be a hook symbol. |
2638 | Call each of the functions in the hook value, passing each of them | |
2639 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2640 | COND specifies a condition to test after each call | |
2641 | to decide whether to stop. | |
2642 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2643 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2644 | ||
2901f1d1 | 2645 | static Lisp_Object |
ff936e53 SM |
2646 | run_hook_with_args (nargs, args, cond) |
2647 | int nargs; | |
2648 | Lisp_Object *args; | |
2649 | enum run_hooks_condition cond; | |
2650 | { | |
2651 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2652 | Lisp_Object globals; |
2653 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2654 | |
f029ca5f RS |
2655 | /* If we are dying or still initializing, |
2656 | don't do anything--it would probably crash if we tried. */ | |
2657 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2658 | return Qnil; |
f029ca5f | 2659 | |
b0b667cb | 2660 | sym = args[0]; |
aa681b51 | 2661 | val = find_symbol_value (sym); |
ff936e53 SM |
2662 | ret = (cond == until_failure ? Qt : Qnil); |
2663 | ||
b0b667cb | 2664 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2665 | return ret; |
03699b14 | 2666 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2667 | { |
2668 | args[0] = val; | |
2669 | return Ffuncall (nargs, args); | |
2670 | } | |
2671 | else | |
2672 | { | |
fada05d6 KH |
2673 | globals = Qnil; |
2674 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2675 | |
ff936e53 SM |
2676 | for (; |
2677 | CONSP (val) && ((cond == to_completion) | |
2678 | || (cond == until_success ? NILP (ret) | |
2679 | : !NILP (ret))); | |
03699b14 | 2680 | val = XCDR (val)) |
b0b667cb | 2681 | { |
03699b14 | 2682 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2683 | { |
2684 | /* t indicates this hook has a local binding; | |
2685 | it means to run the global binding too. */ | |
b0b667cb | 2686 | |
ff936e53 SM |
2687 | for (globals = Fdefault_value (sym); |
2688 | CONSP (globals) && ((cond == to_completion) | |
2689 | || (cond == until_success ? NILP (ret) | |
2690 | : !NILP (ret))); | |
03699b14 | 2691 | globals = XCDR (globals)) |
b0b667cb | 2692 | { |
03699b14 | 2693 | args[0] = XCAR (globals); |
77d92e05 RS |
2694 | /* In a global value, t should not occur. If it does, we |
2695 | must ignore it to avoid an endless loop. */ | |
2696 | if (!EQ (args[0], Qt)) | |
2697 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2698 | } |
2699 | } | |
2700 | else | |
2701 | { | |
03699b14 | 2702 | args[0] = XCAR (val); |
ff936e53 | 2703 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2704 | } |
2705 | } | |
cb9d21f8 RS |
2706 | |
2707 | UNGCPRO; | |
ff936e53 | 2708 | return ret; |
b0b667cb KH |
2709 | } |
2710 | } | |
c933ea05 RS |
2711 | |
2712 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2713 | present value of that symbol. | |
2714 | Call each element of FUNLIST, | |
2715 | passing each of them the rest of ARGS. | |
2716 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2717 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2718 | ||
2719 | Lisp_Object | |
2720 | run_hook_list_with_args (funlist, nargs, args) | |
2721 | Lisp_Object funlist; | |
2722 | int nargs; | |
2723 | Lisp_Object *args; | |
2724 | { | |
2725 | Lisp_Object sym; | |
2726 | Lisp_Object val; | |
fada05d6 KH |
2727 | Lisp_Object globals; |
2728 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2729 | |
2730 | sym = args[0]; | |
fada05d6 KH |
2731 | globals = Qnil; |
2732 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2733 | |
03699b14 | 2734 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2735 | { |
03699b14 | 2736 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2737 | { |
2738 | /* t indicates this hook has a local binding; | |
2739 | it means to run the global binding too. */ | |
c933ea05 RS |
2740 | |
2741 | for (globals = Fdefault_value (sym); | |
2742 | CONSP (globals); | |
03699b14 | 2743 | globals = XCDR (globals)) |
c933ea05 | 2744 | { |
03699b14 | 2745 | args[0] = XCAR (globals); |
77d92e05 RS |
2746 | /* In a global value, t should not occur. If it does, we |
2747 | must ignore it to avoid an endless loop. */ | |
2748 | if (!EQ (args[0], Qt)) | |
2749 | Ffuncall (nargs, args); | |
c933ea05 RS |
2750 | } |
2751 | } | |
2752 | else | |
2753 | { | |
03699b14 | 2754 | args[0] = XCAR (val); |
c933ea05 RS |
2755 | Ffuncall (nargs, args); |
2756 | } | |
2757 | } | |
2758 | UNGCPRO; | |
2759 | return Qnil; | |
2760 | } | |
7d48558f RS |
2761 | |
2762 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2763 | ||
2764 | void | |
2765 | run_hook_with_args_2 (hook, arg1, arg2) | |
2766 | Lisp_Object hook, arg1, arg2; | |
2767 | { | |
2768 | Lisp_Object temp[3]; | |
2769 | temp[0] = hook; | |
2770 | temp[1] = arg1; | |
2771 | temp[2] = arg2; | |
2772 | ||
2773 | Frun_hook_with_args (3, temp); | |
2774 | } | |
ff936e53 | 2775 | \f |
db9f0278 JB |
2776 | /* Apply fn to arg */ |
2777 | Lisp_Object | |
2778 | apply1 (fn, arg) | |
2779 | Lisp_Object fn, arg; | |
2780 | { | |
a6e3fa71 JB |
2781 | struct gcpro gcpro1; |
2782 | ||
2783 | GCPRO1 (fn); | |
265a9e55 | 2784 | if (NILP (arg)) |
a6e3fa71 JB |
2785 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2786 | gcpro1.nvars = 2; | |
db9f0278 JB |
2787 | #ifdef NO_ARG_ARRAY |
2788 | { | |
2789 | Lisp_Object args[2]; | |
2790 | args[0] = fn; | |
2791 | args[1] = arg; | |
a6e3fa71 JB |
2792 | gcpro1.var = args; |
2793 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2794 | } |
2795 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2796 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2797 | #endif /* not NO_ARG_ARRAY */ |
2798 | } | |
2799 | ||
2800 | /* Call function fn on no arguments */ | |
2801 | Lisp_Object | |
2802 | call0 (fn) | |
2803 | Lisp_Object fn; | |
2804 | { | |
a6e3fa71 JB |
2805 | struct gcpro gcpro1; |
2806 | ||
2807 | GCPRO1 (fn); | |
2808 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2809 | } |
2810 | ||
15285f9f | 2811 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2812 | /* ARGSUSED */ |
2813 | Lisp_Object | |
15285f9f RS |
2814 | call1 (fn, arg1) |
2815 | Lisp_Object fn, arg1; | |
db9f0278 | 2816 | { |
a6e3fa71 | 2817 | struct gcpro gcpro1; |
db9f0278 | 2818 | #ifdef NO_ARG_ARRAY |
177c0ea7 | 2819 | Lisp_Object args[2]; |
a6e3fa71 | 2820 | |
db9f0278 | 2821 | args[0] = fn; |
15285f9f | 2822 | args[1] = arg1; |
a6e3fa71 JB |
2823 | GCPRO1 (args[0]); |
2824 | gcpro1.nvars = 2; | |
2825 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2826 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2827 | GCPRO1 (fn); |
2828 | gcpro1.nvars = 2; | |
2829 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2830 | #endif /* not NO_ARG_ARRAY */ |
2831 | } | |
2832 | ||
15285f9f | 2833 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2834 | /* ARGSUSED */ |
2835 | Lisp_Object | |
15285f9f RS |
2836 | call2 (fn, arg1, arg2) |
2837 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2838 | { |
a6e3fa71 | 2839 | struct gcpro gcpro1; |
db9f0278 JB |
2840 | #ifdef NO_ARG_ARRAY |
2841 | Lisp_Object args[3]; | |
2842 | args[0] = fn; | |
15285f9f RS |
2843 | args[1] = arg1; |
2844 | args[2] = arg2; | |
a6e3fa71 JB |
2845 | GCPRO1 (args[0]); |
2846 | gcpro1.nvars = 3; | |
2847 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2848 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2849 | GCPRO1 (fn); |
2850 | gcpro1.nvars = 3; | |
2851 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2852 | #endif /* not NO_ARG_ARRAY */ |
2853 | } | |
2854 | ||
15285f9f | 2855 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2856 | /* ARGSUSED */ |
2857 | Lisp_Object | |
15285f9f RS |
2858 | call3 (fn, arg1, arg2, arg3) |
2859 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2860 | { |
a6e3fa71 | 2861 | struct gcpro gcpro1; |
db9f0278 JB |
2862 | #ifdef NO_ARG_ARRAY |
2863 | Lisp_Object args[4]; | |
2864 | args[0] = fn; | |
15285f9f RS |
2865 | args[1] = arg1; |
2866 | args[2] = arg2; | |
2867 | args[3] = arg3; | |
a6e3fa71 JB |
2868 | GCPRO1 (args[0]); |
2869 | gcpro1.nvars = 4; | |
2870 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2871 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2872 | GCPRO1 (fn); |
2873 | gcpro1.nvars = 4; | |
2874 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2875 | #endif /* not NO_ARG_ARRAY */ |
2876 | } | |
2877 | ||
15285f9f | 2878 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2879 | /* ARGSUSED */ |
2880 | Lisp_Object | |
15285f9f RS |
2881 | call4 (fn, arg1, arg2, arg3, arg4) |
2882 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2883 | { |
2884 | struct gcpro gcpro1; | |
2885 | #ifdef NO_ARG_ARRAY | |
2886 | Lisp_Object args[5]; | |
2887 | args[0] = fn; | |
15285f9f RS |
2888 | args[1] = arg1; |
2889 | args[2] = arg2; | |
2890 | args[3] = arg3; | |
2891 | args[4] = arg4; | |
a5a44b91 JB |
2892 | GCPRO1 (args[0]); |
2893 | gcpro1.nvars = 5; | |
2894 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2895 | #else /* not NO_ARG_ARRAY */ | |
2896 | GCPRO1 (fn); | |
2897 | gcpro1.nvars = 5; | |
2898 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2899 | #endif /* not NO_ARG_ARRAY */ | |
2900 | } | |
2901 | ||
15285f9f RS |
2902 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2903 | /* ARGSUSED */ | |
2904 | Lisp_Object | |
2905 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2906 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2907 | { | |
2908 | struct gcpro gcpro1; | |
2909 | #ifdef NO_ARG_ARRAY | |
2910 | Lisp_Object args[6]; | |
2911 | args[0] = fn; | |
2912 | args[1] = arg1; | |
2913 | args[2] = arg2; | |
2914 | args[3] = arg3; | |
2915 | args[4] = arg4; | |
2916 | args[5] = arg5; | |
2917 | GCPRO1 (args[0]); | |
2918 | gcpro1.nvars = 6; | |
2919 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2920 | #else /* not NO_ARG_ARRAY */ | |
2921 | GCPRO1 (fn); | |
2922 | gcpro1.nvars = 6; | |
2923 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2924 | #endif /* not NO_ARG_ARRAY */ | |
2925 | } | |
2926 | ||
2927 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2928 | /* ARGSUSED */ | |
2929 | Lisp_Object | |
2930 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2931 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2932 | { | |
2933 | struct gcpro gcpro1; | |
2934 | #ifdef NO_ARG_ARRAY | |
2935 | Lisp_Object args[7]; | |
2936 | args[0] = fn; | |
2937 | args[1] = arg1; | |
2938 | args[2] = arg2; | |
2939 | args[3] = arg3; | |
2940 | args[4] = arg4; | |
2941 | args[5] = arg5; | |
2942 | args[6] = arg6; | |
2943 | GCPRO1 (args[0]); | |
2944 | gcpro1.nvars = 7; | |
2945 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2946 | #else /* not NO_ARG_ARRAY */ | |
2947 | GCPRO1 (fn); | |
2948 | gcpro1.nvars = 7; | |
2949 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2950 | #endif /* not NO_ARG_ARRAY */ | |
2951 | } | |
2952 | ||
6c2ef893 RS |
2953 | /* The caller should GCPRO all the elements of ARGS. */ |
2954 | ||
db9f0278 | 2955 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
9dbc9081 PJ |
2956 | doc: /* Call first argument as a function, passing remaining arguments to it. |
2957 | Return the value that function returns. | |
2958 | Thus, (funcall 'cons 'x 'y) returns (x . y). | |
2959 | usage: (funcall FUNCTION &rest ARGUMENTS) */) | |
2960 | (nargs, args) | |
db9f0278 JB |
2961 | int nargs; |
2962 | Lisp_Object *args; | |
2963 | { | |
8788120f | 2964 | Lisp_Object fun, original_fun; |
db9f0278 JB |
2965 | Lisp_Object funcar; |
2966 | int numargs = nargs - 1; | |
2967 | Lisp_Object lisp_numargs; | |
2968 | Lisp_Object val; | |
2969 | struct backtrace backtrace; | |
2970 | register Lisp_Object *internal_args; | |
2971 | register int i; | |
2972 | ||
2973 | QUIT; | |
ee830945 RS |
2974 | if ((consing_since_gc > gc_cons_threshold |
2975 | && consing_since_gc > gc_relative_threshold) | |
2976 | || | |
2977 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
a6e3fa71 | 2978 | Fgarbage_collect (); |
db9f0278 JB |
2979 | |
2980 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2981 | { | |
2982 | if (max_lisp_eval_depth < 100) | |
2983 | max_lisp_eval_depth = 100; | |
2984 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2985 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2986 | } |
2987 | ||
2988 | backtrace.next = backtrace_list; | |
2989 | backtrace_list = &backtrace; | |
2990 | backtrace.function = &args[0]; | |
2991 | backtrace.args = &args[1]; | |
2992 | backtrace.nargs = nargs - 1; | |
2993 | backtrace.evalargs = 0; | |
2994 | backtrace.debug_on_exit = 0; | |
2995 | ||
2996 | if (debug_on_next_call) | |
2997 | do_debug_on_call (Qlambda); | |
2998 | ||
fff3ff9c KS |
2999 | CHECK_CONS_LIST (); |
3000 | ||
8788120f KS |
3001 | original_fun = args[0]; |
3002 | ||
db9f0278 JB |
3003 | retry: |
3004 | ||
8788120f KS |
3005 | /* Optimize for no indirection. */ |
3006 | fun = original_fun; | |
3007 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
3008 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
3009 | fun = indirect_function (fun); | |
db9f0278 | 3010 | |
90165123 | 3011 | if (SUBRP (fun)) |
db9f0278 | 3012 | { |
fff3ff9c | 3013 | if (numargs < XSUBR (fun)->min_args |
db9f0278 JB |
3014 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) |
3015 | { | |
a631e24c | 3016 | XSETFASTINT (lisp_numargs, numargs); |
734d55a2 | 3017 | xsignal2 (Qwrong_number_of_arguments, original_fun, lisp_numargs); |
db9f0278 JB |
3018 | } |
3019 | ||
3020 | if (XSUBR (fun)->max_args == UNEVALLED) | |
734d55a2 | 3021 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3022 | |
3023 | if (XSUBR (fun)->max_args == MANY) | |
3024 | { | |
3025 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
3026 | goto done; | |
3027 | } | |
3028 | ||
3029 | if (XSUBR (fun)->max_args > numargs) | |
3030 | { | |
3031 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
3032 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
3033 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
3034 | internal_args[i] = Qnil; | |
3035 | } | |
3036 | else | |
3037 | internal_args = args + 1; | |
3038 | switch (XSUBR (fun)->max_args) | |
3039 | { | |
3040 | case 0: | |
3041 | val = (*XSUBR (fun)->function) (); | |
3042 | goto done; | |
3043 | case 1: | |
3044 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
3045 | goto done; | |
3046 | case 2: | |
82fc29a1 | 3047 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1]); |
db9f0278 JB |
3048 | goto done; |
3049 | case 3: | |
3050 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3051 | internal_args[2]); | |
3052 | goto done; | |
3053 | case 4: | |
3054 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
82fc29a1 | 3055 | internal_args[2], internal_args[3]); |
db9f0278 JB |
3056 | goto done; |
3057 | case 5: | |
3058 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3059 | internal_args[2], internal_args[3], | |
3060 | internal_args[4]); | |
3061 | goto done; | |
3062 | case 6: | |
3063 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3064 | internal_args[2], internal_args[3], | |
3065 | internal_args[4], internal_args[5]); | |
3066 | goto done; | |
15c65264 RS |
3067 | case 7: |
3068 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3069 | internal_args[2], internal_args[3], | |
3070 | internal_args[4], internal_args[5], | |
3071 | internal_args[6]); | |
3072 | goto done; | |
db9f0278 | 3073 | |
166c822d KH |
3074 | case 8: |
3075 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3076 | internal_args[2], internal_args[3], | |
3077 | internal_args[4], internal_args[5], | |
3078 | internal_args[6], internal_args[7]); | |
3079 | goto done; | |
3080 | ||
db9f0278 | 3081 | default: |
70ee42f7 | 3082 | |
166c822d | 3083 | /* If a subr takes more than 8 arguments without using MANY |
177c0ea7 | 3084 | or UNEVALLED, we need to extend this function to support it. |
70ee42f7 JB |
3085 | Until this is done, there is no way to call the function. */ |
3086 | abort (); | |
db9f0278 JB |
3087 | } |
3088 | } | |
90165123 | 3089 | if (COMPILEDP (fun)) |
db9f0278 JB |
3090 | val = funcall_lambda (fun, numargs, args + 1); |
3091 | else | |
3092 | { | |
8788120f | 3093 | if (EQ (fun, Qunbound)) |
734d55a2 | 3094 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 3095 | if (!CONSP (fun)) |
734d55a2 KS |
3096 | xsignal1 (Qinvalid_function, original_fun); |
3097 | funcar = XCAR (fun); | |
90165123 | 3098 | if (!SYMBOLP (funcar)) |
734d55a2 | 3099 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3100 | if (EQ (funcar, Qlambda)) |
3101 | val = funcall_lambda (fun, numargs, args + 1); | |
db9f0278 JB |
3102 | else if (EQ (funcar, Qautoload)) |
3103 | { | |
8788120f | 3104 | do_autoload (fun, original_fun); |
fff3ff9c | 3105 | CHECK_CONS_LIST (); |
db9f0278 JB |
3106 | goto retry; |
3107 | } | |
3108 | else | |
734d55a2 | 3109 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3110 | } |
3111 | done: | |
c1788fbc | 3112 | CHECK_CONS_LIST (); |
db9f0278 JB |
3113 | lisp_eval_depth--; |
3114 | if (backtrace.debug_on_exit) | |
3115 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
3116 | backtrace_list = backtrace.next; | |
3117 | return val; | |
3118 | } | |
3119 | \f | |
3120 | Lisp_Object | |
3121 | apply_lambda (fun, args, eval_flag) | |
3122 | Lisp_Object fun, args; | |
3123 | int eval_flag; | |
3124 | { | |
3125 | Lisp_Object args_left; | |
3126 | Lisp_Object numargs; | |
3127 | register Lisp_Object *arg_vector; | |
3128 | struct gcpro gcpro1, gcpro2, gcpro3; | |
3129 | register int i; | |
3130 | register Lisp_Object tem; | |
3131 | ||
3132 | numargs = Flength (args); | |
3133 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
3134 | args_left = args; | |
3135 | ||
3136 | GCPRO3 (*arg_vector, args_left, fun); | |
3137 | gcpro1.nvars = 0; | |
3138 | ||
3139 | for (i = 0; i < XINT (numargs);) | |
3140 | { | |
3141 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
3142 | if (eval_flag) tem = Feval (tem); | |
3143 | arg_vector[i++] = tem; | |
3144 | gcpro1.nvars = i; | |
3145 | } | |
3146 | ||
3147 | UNGCPRO; | |
3148 | ||
3149 | if (eval_flag) | |
3150 | { | |
3151 | backtrace_list->args = arg_vector; | |
3152 | backtrace_list->nargs = i; | |
3153 | } | |
3154 | backtrace_list->evalargs = 0; | |
3155 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
3156 | ||
3157 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
3158 | if (backtrace_list->debug_on_exit) | |
3159 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
3160 | /* Don't do it again when we return to eval. */ | |
3161 | backtrace_list->debug_on_exit = 0; | |
3162 | return tem; | |
3163 | } | |
3164 | ||
3165 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
3166 | and return the result of evaluation. | |
3167 | FUN must be either a lambda-expression or a compiled-code object. */ | |
3168 | ||
2901f1d1 | 3169 | static Lisp_Object |
db9f0278 JB |
3170 | funcall_lambda (fun, nargs, arg_vector) |
3171 | Lisp_Object fun; | |
3172 | int nargs; | |
3173 | register Lisp_Object *arg_vector; | |
3174 | { | |
9ab90667 | 3175 | Lisp_Object val, syms_left, next; |
aed13378 | 3176 | int count = SPECPDL_INDEX (); |
9ab90667 | 3177 | int i, optional, rest; |
db9f0278 | 3178 | |
90165123 | 3179 | if (CONSP (fun)) |
9ab90667 GM |
3180 | { |
3181 | syms_left = XCDR (fun); | |
3182 | if (CONSP (syms_left)) | |
3183 | syms_left = XCAR (syms_left); | |
3184 | else | |
734d55a2 | 3185 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3186 | } |
90165123 | 3187 | else if (COMPILEDP (fun)) |
845975f5 | 3188 | syms_left = AREF (fun, COMPILED_ARGLIST); |
9ab90667 GM |
3189 | else |
3190 | abort (); | |
db9f0278 | 3191 | |
9ab90667 GM |
3192 | i = optional = rest = 0; |
3193 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
3194 | { |
3195 | QUIT; | |
177c0ea7 | 3196 | |
9ab90667 | 3197 | next = XCAR (syms_left); |
8788120f | 3198 | if (!SYMBOLP (next)) |
734d55a2 | 3199 | xsignal1 (Qinvalid_function, fun); |
177c0ea7 | 3200 | |
db9f0278 JB |
3201 | if (EQ (next, Qand_rest)) |
3202 | rest = 1; | |
3203 | else if (EQ (next, Qand_optional)) | |
3204 | optional = 1; | |
3205 | else if (rest) | |
3206 | { | |
9ffa21d4 | 3207 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
3208 | i = nargs; |
3209 | } | |
3210 | else if (i < nargs) | |
9ab90667 | 3211 | specbind (next, arg_vector[i++]); |
db9f0278 | 3212 | else if (!optional) |
734d55a2 | 3213 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 JB |
3214 | else |
3215 | specbind (next, Qnil); | |
3216 | } | |
3217 | ||
9ab90667 | 3218 | if (!NILP (syms_left)) |
734d55a2 | 3219 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3220 | else if (i < nargs) |
734d55a2 | 3221 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 | 3222 | |
90165123 | 3223 | if (CONSP (fun)) |
9ab90667 | 3224 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 3225 | else |
ca248607 RS |
3226 | { |
3227 | /* If we have not actually read the bytecode string | |
3228 | and constants vector yet, fetch them from the file. */ | |
845975f5 | 3229 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) |
661c7d6e | 3230 | Ffetch_bytecode (fun); |
845975f5 SM |
3231 | val = Fbyte_code (AREF (fun, COMPILED_BYTECODE), |
3232 | AREF (fun, COMPILED_CONSTANTS), | |
3233 | AREF (fun, COMPILED_STACK_DEPTH)); | |
ca248607 | 3234 | } |
177c0ea7 | 3235 | |
db9f0278 JB |
3236 | return unbind_to (count, val); |
3237 | } | |
661c7d6e KH |
3238 | |
3239 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
9dbc9081 PJ |
3240 | 1, 1, 0, |
3241 | doc: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */) | |
3242 | (object) | |
661c7d6e KH |
3243 | Lisp_Object object; |
3244 | { | |
3245 | Lisp_Object tem; | |
3246 | ||
845975f5 | 3247 | if (COMPILEDP (object) && CONSP (AREF (object, COMPILED_BYTECODE))) |
661c7d6e | 3248 | { |
845975f5 | 3249 | tem = read_doc_string (AREF (object, COMPILED_BYTECODE)); |
5bbdb090 | 3250 | if (!CONSP (tem)) |
845975f5 SM |
3251 | { |
3252 | tem = AREF (object, COMPILED_BYTECODE); | |
3253 | if (CONSP (tem) && STRINGP (XCAR (tem))) | |
d5db4077 | 3254 | error ("Invalid byte code in %s", SDATA (XCAR (tem))); |
845975f5 SM |
3255 | else |
3256 | error ("Invalid byte code"); | |
3257 | } | |
3ae565b3 SM |
3258 | ASET (object, COMPILED_BYTECODE, XCAR (tem)); |
3259 | ASET (object, COMPILED_CONSTANTS, XCDR (tem)); | |
661c7d6e KH |
3260 | } |
3261 | return object; | |
3262 | } | |
db9f0278 JB |
3263 | \f |
3264 | void | |
3265 | grow_specpdl () | |
3266 | { | |
aed13378 | 3267 | register int count = SPECPDL_INDEX (); |
db9f0278 JB |
3268 | if (specpdl_size >= max_specpdl_size) |
3269 | { | |
3270 | if (max_specpdl_size < 400) | |
3271 | max_specpdl_size = 400; | |
3272 | if (specpdl_size >= max_specpdl_size) | |
734d55a2 | 3273 | signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil); |
db9f0278 JB |
3274 | } |
3275 | specpdl_size *= 2; | |
3276 | if (specpdl_size > max_specpdl_size) | |
3277 | specpdl_size = max_specpdl_size; | |
3278 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
3279 | specpdl_ptr = specpdl + count; | |
3280 | } | |
3281 | ||
3282 | void | |
3283 | specbind (symbol, value) | |
3284 | Lisp_Object symbol, value; | |
3285 | { | |
19cebf5a | 3286 | Lisp_Object valcontents; |
db9f0278 | 3287 | |
b7826503 | 3288 | CHECK_SYMBOL (symbol); |
db9f0278 JB |
3289 | if (specpdl_ptr == specpdl + specpdl_size) |
3290 | grow_specpdl (); | |
719177b3 | 3291 | |
19cebf5a GM |
3292 | /* The most common case is that of a non-constant symbol with a |
3293 | trivial value. Make that as fast as we can. */ | |
3294 | valcontents = SYMBOL_VALUE (symbol); | |
3295 | if (!MISCP (valcontents) && !SYMBOL_CONSTANT_P (symbol)) | |
719177b3 | 3296 | { |
9ab90667 | 3297 | specpdl_ptr->symbol = symbol; |
19cebf5a | 3298 | specpdl_ptr->old_value = valcontents; |
9ab90667 GM |
3299 | specpdl_ptr->func = NULL; |
3300 | ++specpdl_ptr; | |
19cebf5a | 3301 | SET_SYMBOL_VALUE (symbol, value); |
719177b3 RS |
3302 | } |
3303 | else | |
9ab90667 | 3304 | { |
136eb6ed | 3305 | Lisp_Object ovalue = find_symbol_value (symbol); |
9ab90667 GM |
3306 | specpdl_ptr->func = 0; |
3307 | specpdl_ptr->old_value = ovalue; | |
719177b3 | 3308 | |
eb700b82 GM |
3309 | valcontents = XSYMBOL (symbol)->value; |
3310 | ||
3311 | if (BUFFER_LOCAL_VALUEP (valcontents) | |
eb700b82 | 3312 | || BUFFER_OBJFWDP (valcontents)) |
9ab90667 | 3313 | { |
0967b4b0 GM |
3314 | Lisp_Object where, current_buffer; |
3315 | ||
3316 | current_buffer = Fcurrent_buffer (); | |
177c0ea7 | 3317 | |
9ab90667 | 3318 | /* For a local variable, record both the symbol and which |
eb700b82 GM |
3319 | buffer's or frame's value we are saving. */ |
3320 | if (!NILP (Flocal_variable_p (symbol, Qnil))) | |
0967b4b0 | 3321 | where = current_buffer; |
67ee9f6e | 3322 | else if (BUFFER_LOCAL_VALUEP (valcontents) |
eb700b82 GM |
3323 | && XBUFFER_LOCAL_VALUE (valcontents)->found_for_frame) |
3324 | where = XBUFFER_LOCAL_VALUE (valcontents)->frame; | |
3325 | else | |
3326 | where = Qnil; | |
3327 | ||
3328 | /* We're not using the `unused' slot in the specbinding | |
3329 | structure because this would mean we have to do more | |
3330 | work for simple variables. */ | |
0967b4b0 | 3331 | specpdl_ptr->symbol = Fcons (symbol, Fcons (where, current_buffer)); |
06bccf8e GM |
3332 | |
3333 | /* If SYMBOL is a per-buffer variable which doesn't have a | |
3334 | buffer-local value here, make the `let' change the global | |
3335 | value by changing the value of SYMBOL in all buffers not | |
3336 | having their own value. This is consistent with what | |
3337 | happens with other buffer-local variables. */ | |
eb700b82 GM |
3338 | if (NILP (where) |
3339 | && BUFFER_OBJFWDP (valcontents)) | |
06bccf8e GM |
3340 | { |
3341 | ++specpdl_ptr; | |
3342 | Fset_default (symbol, value); | |
3343 | return; | |
3344 | } | |
9ab90667 GM |
3345 | } |
3346 | else | |
3347 | specpdl_ptr->symbol = symbol; | |
3348 | ||
3349 | specpdl_ptr++; | |
136eb6ed SM |
3350 | /* We used to do |
3351 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) | |
3352 | store_symval_forwarding (symbol, ovalue, value, NULL); | |
3353 | else | |
3354 | but ovalue comes from find_symbol_value which should never return | |
3355 | such an internal value. */ | |
3356 | eassert (!(BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue))); | |
3357 | set_internal (symbol, value, 0, 1); | |
9ab90667 | 3358 | } |
db9f0278 JB |
3359 | } |
3360 | ||
3361 | void | |
3362 | record_unwind_protect (function, arg) | |
1d159538 | 3363 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
3364 | Lisp_Object arg; |
3365 | { | |
9ba8e10d CY |
3366 | eassert (!handling_signal); |
3367 | ||
db9f0278 JB |
3368 | if (specpdl_ptr == specpdl + specpdl_size) |
3369 | grow_specpdl (); | |
3370 | specpdl_ptr->func = function; | |
3371 | specpdl_ptr->symbol = Qnil; | |
3372 | specpdl_ptr->old_value = arg; | |
3373 | specpdl_ptr++; | |
3374 | } | |
3375 | ||
3376 | Lisp_Object | |
3377 | unbind_to (count, value) | |
3378 | int count; | |
3379 | Lisp_Object value; | |
3380 | { | |
5a073f50 KS |
3381 | Lisp_Object quitf = Vquit_flag; |
3382 | struct gcpro gcpro1, gcpro2; | |
db9f0278 | 3383 | |
5a073f50 | 3384 | GCPRO2 (value, quitf); |
db9f0278 JB |
3385 | Vquit_flag = Qnil; |
3386 | ||
3387 | while (specpdl_ptr != specpdl + count) | |
3388 | { | |
611a8f8c RS |
3389 | /* Copy the binding, and decrement specpdl_ptr, before we do |
3390 | the work to unbind it. We decrement first | |
3391 | so that an error in unbinding won't try to unbind | |
3392 | the same entry again, and we copy the binding first | |
3393 | in case more bindings are made during some of the code we run. */ | |
eb700b82 | 3394 | |
45f266dc DL |
3395 | struct specbinding this_binding; |
3396 | this_binding = *--specpdl_ptr; | |
611a8f8c RS |
3397 | |
3398 | if (this_binding.func != 0) | |
3399 | (*this_binding.func) (this_binding.old_value); | |
0967b4b0 GM |
3400 | /* If the symbol is a list, it is really (SYMBOL WHERE |
3401 | . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a | |
3402 | frame. If WHERE is a buffer or frame, this indicates we | |
1b1acc13 PJ |
3403 | bound a variable that had a buffer-local or frame-local |
3404 | binding. WHERE nil means that the variable had the default | |
0967b4b0 GM |
3405 | value when it was bound. CURRENT-BUFFER is the buffer that |
3406 | was current when the variable was bound. */ | |
611a8f8c | 3407 | else if (CONSP (this_binding.symbol)) |
719177b3 | 3408 | { |
eb700b82 | 3409 | Lisp_Object symbol, where; |
719177b3 | 3410 | |
611a8f8c RS |
3411 | symbol = XCAR (this_binding.symbol); |
3412 | where = XCAR (XCDR (this_binding.symbol)); | |
719177b3 | 3413 | |
eb700b82 | 3414 | if (NILP (where)) |
611a8f8c | 3415 | Fset_default (symbol, this_binding.old_value); |
eb700b82 | 3416 | else if (BUFFERP (where)) |
611a8f8c | 3417 | set_internal (symbol, this_binding.old_value, XBUFFER (where), 1); |
177c0ea7 | 3418 | else |
611a8f8c | 3419 | set_internal (symbol, this_binding.old_value, NULL, 1); |
719177b3 | 3420 | } |
db9f0278 | 3421 | else |
9ab90667 GM |
3422 | { |
3423 | /* If variable has a trivial value (no forwarding), we can | |
3424 | just set it. No need to check for constant symbols here, | |
3425 | since that was already done by specbind. */ | |
611a8f8c RS |
3426 | if (!MISCP (SYMBOL_VALUE (this_binding.symbol))) |
3427 | SET_SYMBOL_VALUE (this_binding.symbol, this_binding.old_value); | |
9ab90667 | 3428 | else |
611a8f8c | 3429 | set_internal (this_binding.symbol, this_binding.old_value, 0, 1); |
9ab90667 | 3430 | } |
db9f0278 | 3431 | } |
177c0ea7 | 3432 | |
5a073f50 KS |
3433 | if (NILP (Vquit_flag) && !NILP (quitf)) |
3434 | Vquit_flag = quitf; | |
db9f0278 JB |
3435 | |
3436 | UNGCPRO; | |
db9f0278 JB |
3437 | return value; |
3438 | } | |
3439 | \f | |
db9f0278 | 3440 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, |
9dbc9081 PJ |
3441 | doc: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. |
3442 | The debugger is entered when that frame exits, if the flag is non-nil. */) | |
3443 | (level, flag) | |
db9f0278 JB |
3444 | Lisp_Object level, flag; |
3445 | { | |
3446 | register struct backtrace *backlist = backtrace_list; | |
3447 | register int i; | |
3448 | ||
b7826503 | 3449 | CHECK_NUMBER (level); |
db9f0278 JB |
3450 | |
3451 | for (i = 0; backlist && i < XINT (level); i++) | |
3452 | { | |
3453 | backlist = backlist->next; | |
3454 | } | |
3455 | ||
3456 | if (backlist) | |
265a9e55 | 3457 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
3458 | |
3459 | return flag; | |
3460 | } | |
3461 | ||
3462 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
9dbc9081 PJ |
3463 | doc: /* Print a trace of Lisp function calls currently active. |
3464 | Output stream used is value of `standard-output'. */) | |
3465 | () | |
db9f0278 JB |
3466 | { |
3467 | register struct backtrace *backlist = backtrace_list; | |
3468 | register int i; | |
3469 | Lisp_Object tail; | |
3470 | Lisp_Object tem; | |
3471 | extern Lisp_Object Vprint_level; | |
3472 | struct gcpro gcpro1; | |
3473 | ||
a631e24c | 3474 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
3475 | |
3476 | tail = Qnil; | |
3477 | GCPRO1 (tail); | |
3478 | ||
3479 | while (backlist) | |
3480 | { | |
3481 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
3482 | if (backlist->nargs == UNEVALLED) | |
3483 | { | |
3484 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 3485 | write_string ("\n", -1); |
db9f0278 JB |
3486 | } |
3487 | else | |
3488 | { | |
3489 | tem = *backlist->function; | |
3490 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
3491 | write_string ("(", -1); | |
3492 | if (backlist->nargs == MANY) | |
3493 | { | |
3494 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 3495 | !NILP (tail); |
db9f0278 JB |
3496 | tail = Fcdr (tail), i++) |
3497 | { | |
3498 | if (i) write_string (" ", -1); | |
3499 | Fprin1 (Fcar (tail), Qnil); | |
3500 | } | |
3501 | } | |
3502 | else | |
3503 | { | |
3504 | for (i = 0; i < backlist->nargs; i++) | |
3505 | { | |
3506 | if (i) write_string (" ", -1); | |
3507 | Fprin1 (backlist->args[i], Qnil); | |
3508 | } | |
3509 | } | |
b6703b02 | 3510 | write_string (")\n", -1); |
db9f0278 | 3511 | } |
db9f0278 JB |
3512 | backlist = backlist->next; |
3513 | } | |
3514 | ||
3515 | Vprint_level = Qnil; | |
3516 | UNGCPRO; | |
3517 | return Qnil; | |
3518 | } | |
3519 | ||
17401c97 | 3520 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
9dbc9081 PJ |
3521 | doc: /* Return the function and arguments NFRAMES up from current execution point. |
3522 | If that frame has not evaluated the arguments yet (or is a special form), | |
3523 | the value is (nil FUNCTION ARG-FORMS...). | |
3524 | If that frame has evaluated its arguments and called its function already, | |
3525 | the value is (t FUNCTION ARG-VALUES...). | |
3526 | A &rest arg is represented as the tail of the list ARG-VALUES. | |
3527 | FUNCTION is whatever was supplied as car of evaluated list, | |
3528 | or a lambda expression for macro calls. | |
3529 | If NFRAMES is more than the number of frames, the value is nil. */) | |
3530 | (nframes) | |
db9f0278 JB |
3531 | Lisp_Object nframes; |
3532 | { | |
3533 | register struct backtrace *backlist = backtrace_list; | |
3534 | register int i; | |
3535 | Lisp_Object tem; | |
3536 | ||
b7826503 | 3537 | CHECK_NATNUM (nframes); |
db9f0278 JB |
3538 | |
3539 | /* Find the frame requested. */ | |
b6703b02 | 3540 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
3541 | backlist = backlist->next; |
3542 | ||
3543 | if (!backlist) | |
3544 | return Qnil; | |
3545 | if (backlist->nargs == UNEVALLED) | |
3546 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
3547 | else | |
3548 | { | |
3549 | if (backlist->nargs == MANY) | |
3550 | tem = *backlist->args; | |
3551 | else | |
3552 | tem = Flist (backlist->nargs, backlist->args); | |
3553 | ||
3554 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3555 | } | |
3556 | } | |
a2ff3819 | 3557 | |
db9f0278 | 3558 | \f |
4ce0541e SM |
3559 | void |
3560 | mark_backtrace () | |
3561 | { | |
3562 | register struct backtrace *backlist; | |
3563 | register int i; | |
3564 | ||
3565 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
3566 | { | |
3567 | mark_object (*backlist->function); | |
3568 | ||
3569 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
3570 | i = 0; | |
3571 | else | |
3572 | i = backlist->nargs - 1; | |
3573 | for (; i >= 0; i--) | |
3574 | mark_object (backlist->args[i]); | |
3575 | } | |
3576 | } | |
3577 | ||
dfcf069d | 3578 | void |
db9f0278 JB |
3579 | syms_of_eval () |
3580 | { | |
3581 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
82fc29a1 | 3582 | doc: /* *Limit on number of Lisp variable bindings and `unwind-protect's. |
9f5903bb | 3583 | If Lisp code tries to increase the total number past this amount, |
2520dc0c RS |
3584 | an error is signaled. |
3585 | You can safely use a value considerably larger than the default value, | |
3586 | if that proves inconveniently small. However, if you increase it too far, | |
3587 | Emacs could run out of memory trying to make the stack bigger. */); | |
db9f0278 JB |
3588 | |
3589 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
9dbc9081 | 3590 | doc: /* *Limit on depth in `eval', `apply' and `funcall' before error. |
2520dc0c RS |
3591 | |
3592 | This limit serves to catch infinite recursions for you before they cause | |
9dbc9081 PJ |
3593 | actual stack overflow in C, which would be fatal for Emacs. |
3594 | You can safely make it considerably larger than its default value, | |
2520dc0c RS |
3595 | if that proves inconveniently small. However, if you increase it too far, |
3596 | Emacs could overflow the real C stack, and crash. */); | |
db9f0278 JB |
3597 | |
3598 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
9dbc9081 | 3599 | doc: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil. |
42ed718e RS |
3600 | If the value is t, that means do an ordinary quit. |
3601 | If the value equals `throw-on-input', that means quit by throwing | |
3602 | to the tag specified in `throw-on-input'; it's for handling `while-no-input'. | |
3603 | Typing C-g sets `quit-flag' to t, regardless of `inhibit-quit', | |
3604 | but `inhibit-quit' non-nil prevents anything from taking notice of that. */); | |
db9f0278 JB |
3605 | Vquit_flag = Qnil; |
3606 | ||
3607 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
9dbc9081 PJ |
3608 | doc: /* Non-nil inhibits C-g quitting from happening immediately. |
3609 | Note that `quit-flag' will still be set by typing C-g, | |
3610 | so a quit will be signaled as soon as `inhibit-quit' is nil. | |
3611 | To prevent this happening, set `quit-flag' to nil | |
3612 | before making `inhibit-quit' nil. */); | |
db9f0278 JB |
3613 | Vinhibit_quit = Qnil; |
3614 | ||
ad236261 JB |
3615 | Qinhibit_quit = intern ("inhibit-quit"); |
3616 | staticpro (&Qinhibit_quit); | |
3617 | ||
db9f0278 JB |
3618 | Qautoload = intern ("autoload"); |
3619 | staticpro (&Qautoload); | |
3620 | ||
3621 | Qdebug_on_error = intern ("debug-on-error"); | |
3622 | staticpro (&Qdebug_on_error); | |
3623 | ||
3624 | Qmacro = intern ("macro"); | |
3625 | staticpro (&Qmacro); | |
3626 | ||
d6edd563 GM |
3627 | Qdeclare = intern ("declare"); |
3628 | staticpro (&Qdeclare); | |
177c0ea7 | 3629 | |
db9f0278 JB |
3630 | /* Note that the process handling also uses Qexit, but we don't want |
3631 | to staticpro it twice, so we just do it here. */ | |
3632 | Qexit = intern ("exit"); | |
3633 | staticpro (&Qexit); | |
3634 | ||
3635 | Qinteractive = intern ("interactive"); | |
3636 | staticpro (&Qinteractive); | |
3637 | ||
3638 | Qcommandp = intern ("commandp"); | |
3639 | staticpro (&Qcommandp); | |
3640 | ||
3641 | Qdefun = intern ("defun"); | |
3642 | staticpro (&Qdefun); | |
3643 | ||
3644 | Qand_rest = intern ("&rest"); | |
3645 | staticpro (&Qand_rest); | |
3646 | ||
3647 | Qand_optional = intern ("&optional"); | |
3648 | staticpro (&Qand_optional); | |
3649 | ||
f01cbfdd RS |
3650 | Qdebug = intern ("debug"); |
3651 | staticpro (&Qdebug); | |
3652 | ||
128c0f66 | 3653 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
704788b3 RS |
3654 | doc: /* *Non-nil means errors display a backtrace buffer. |
3655 | More precisely, this happens for any error that is handled | |
3656 | by the editor command loop. | |
9dbc9081 PJ |
3657 | If the value is a list, an error only means to display a backtrace |
3658 | if one of its condition symbols appears in the list. */); | |
128c0f66 | 3659 | Vstack_trace_on_error = Qnil; |
db9f0278 | 3660 | |
128c0f66 | 3661 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
9dbc9081 PJ |
3662 | doc: /* *Non-nil means enter debugger if an error is signaled. |
3663 | Does not apply to errors handled by `condition-case' or those | |
3664 | matched by `debug-ignored-errors'. | |
3665 | If the value is a list, an error only means to enter the debugger | |
3666 | if one of its condition symbols appears in the list. | |
3667 | When you evaluate an expression interactively, this variable | |
3668 | is temporarily non-nil if `eval-expression-debug-on-error' is non-nil. | |
fbbdcf2f CY |
3669 | The command `toggle-debug-on-error' toggles this. |
3670 | See also the variable `debug-on-quit'. */); | |
128c0f66 | 3671 | Vdebug_on_error = Qnil; |
db9f0278 | 3672 | |
fc950e09 | 3673 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
9dbc9081 PJ |
3674 | doc: /* *List of errors for which the debugger should not be called. |
3675 | Each element may be a condition-name or a regexp that matches error messages. | |
3676 | If any element applies to a given error, that error skips the debugger | |
3677 | and just returns to top level. | |
3678 | This overrides the variable `debug-on-error'. | |
3679 | It does not apply to errors handled by `condition-case'. */); | |
fc950e09 KH |
3680 | Vdebug_ignored_errors = Qnil; |
3681 | ||
db9f0278 | 3682 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
82fc29a1 JB |
3683 | doc: /* *Non-nil means enter debugger if quit is signaled (C-g, for example). |
3684 | Does not apply if quit is handled by a `condition-case'. */); | |
db9f0278 JB |
3685 | debug_on_quit = 0; |
3686 | ||
3687 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
9dbc9081 | 3688 | doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */); |
db9f0278 | 3689 | |
556d7314 | 3690 | DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue, |
9dbc9081 PJ |
3691 | doc: /* Non-nil means debugger may continue execution. |
3692 | This is nil when the debugger is called under circumstances where it | |
3693 | might not be safe to continue. */); | |
dac204bc | 3694 | debugger_may_continue = 1; |
556d7314 | 3695 | |
db9f0278 | 3696 | DEFVAR_LISP ("debugger", &Vdebugger, |
9dbc9081 PJ |
3697 | doc: /* Function to call to invoke debugger. |
3698 | If due to frame exit, args are `exit' and the value being returned; | |
3699 | this function's value will be returned instead of that. | |
3700 | If due to error, args are `error' and a list of the args to `signal'. | |
3701 | If due to `apply' or `funcall' entry, one arg, `lambda'. | |
3702 | If due to `eval' entry, one arg, t. */); | |
db9f0278 JB |
3703 | Vdebugger = Qnil; |
3704 | ||
61ede770 | 3705 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
9dbc9081 PJ |
3706 | doc: /* If non-nil, this is a function for `signal' to call. |
3707 | It receives the same arguments that `signal' was given. | |
3708 | The Edebug package uses this to regain control. */); | |
61ede770 RS |
3709 | Vsignal_hook_function = Qnil; |
3710 | ||
57a6e758 | 3711 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
9dbc9081 PJ |
3712 | doc: /* *Non-nil means call the debugger regardless of condition handlers. |
3713 | Note that `debug-on-error', `debug-on-quit' and friends | |
3714 | still determine whether to handle the particular condition. */); | |
57a6e758 | 3715 | Vdebug_on_signal = Qnil; |
61ede770 | 3716 | |
d6edd563 GM |
3717 | DEFVAR_LISP ("macro-declaration-function", &Vmacro_declaration_function, |
3718 | doc: /* Function to process declarations in a macro definition. | |
3719 | The function will be called with two args MACRO and DECL. | |
3720 | MACRO is the name of the macro being defined. | |
3721 | DECL is a list `(declare ...)' containing the declarations. | |
3722 | The value the function returns is not used. */); | |
3723 | Vmacro_declaration_function = Qnil; | |
3724 | ||
6e6e9f08 RS |
3725 | Vrun_hooks = intern ("run-hooks"); |
3726 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3727 | |
3728 | staticpro (&Vautoload_queue); | |
3729 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3730 | staticpro (&Vsignaling_function); |
3731 | Vsignaling_function = Qnil; | |
db9f0278 JB |
3732 | |
3733 | defsubr (&Sor); | |
3734 | defsubr (&Sand); | |
3735 | defsubr (&Sif); | |
3736 | defsubr (&Scond); | |
3737 | defsubr (&Sprogn); | |
3738 | defsubr (&Sprog1); | |
3739 | defsubr (&Sprog2); | |
3740 | defsubr (&Ssetq); | |
3741 | defsubr (&Squote); | |
3742 | defsubr (&Sfunction); | |
3743 | defsubr (&Sdefun); | |
3744 | defsubr (&Sdefmacro); | |
3745 | defsubr (&Sdefvar); | |
19cebf5a | 3746 | defsubr (&Sdefvaralias); |
db9f0278 JB |
3747 | defsubr (&Sdefconst); |
3748 | defsubr (&Suser_variable_p); | |
3749 | defsubr (&Slet); | |
3750 | defsubr (&SletX); | |
3751 | defsubr (&Swhile); | |
3752 | defsubr (&Smacroexpand); | |
3753 | defsubr (&Scatch); | |
3754 | defsubr (&Sthrow); | |
3755 | defsubr (&Sunwind_protect); | |
3756 | defsubr (&Scondition_case); | |
3757 | defsubr (&Ssignal); | |
3758 | defsubr (&Sinteractive_p); | |
4b664e76 | 3759 | defsubr (&Scalled_interactively_p); |
db9f0278 JB |
3760 | defsubr (&Scommandp); |
3761 | defsubr (&Sautoload); | |
3762 | defsubr (&Seval); | |
3763 | defsubr (&Sapply); | |
3764 | defsubr (&Sfuncall); | |
ff936e53 SM |
3765 | defsubr (&Srun_hooks); |
3766 | defsubr (&Srun_hook_with_args); | |
3767 | defsubr (&Srun_hook_with_args_until_success); | |
3768 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3769 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3770 | defsubr (&Sbacktrace_debug); |
3771 | defsubr (&Sbacktrace); | |
3772 | defsubr (&Sbacktrace_frame); | |
3773 | } | |
ab5796a9 MB |
3774 | |
3775 | /* arch-tag: 014a07aa-33ab-4a8f-a3d2-ee8a4a9ff7fb | |
3776 | (do not change this comment) */ |