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db9f0278 | 1 | /* Evaluator for GNU Emacs Lisp interpreter. |
73b0cd50 | 2 | Copyright (C) 1985-1987, 1993-1995, 1999-2011 Free Software Foundation, Inc. |
db9f0278 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
db9f0278 | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
db9f0278 JB |
10 | |
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
db9f0278 JB |
18 | |
19 | ||
18160b98 | 20 | #include <config.h> |
eb3f1cc8 | 21 | #include <limits.h> |
d7306fe6 | 22 | #include <setjmp.h> |
4e2fe2e6 | 23 | #include <stdio.h> |
db9f0278 | 24 | #include "lisp.h" |
9ac0d9e0 | 25 | #include "blockinput.h" |
db9f0278 | 26 | #include "commands.h" |
1f98fa48 | 27 | #include "keyboard.h" |
3648c842 | 28 | #include "dispextern.h" |
94b612ad | 29 | #include "frame.h" /* For XFRAME. */ |
db9f0278 | 30 | |
b70e1a2b SM |
31 | #if HAVE_X_WINDOWS |
32 | #include "xterm.h" | |
33 | #endif | |
34 | ||
db9f0278 | 35 | struct backtrace |
4c576a83 GM |
36 | { |
37 | struct backtrace *next; | |
38 | Lisp_Object *function; | |
f6d62986 | 39 | Lisp_Object *args; /* Points to vector of args. */ |
bbc6b304 | 40 | ptrdiff_t nargs; /* Length of vector. */ |
f6d62986 | 41 | /* Nonzero means call value of debugger when done with this operation. */ |
bbc6b304 | 42 | unsigned int debug_on_exit : 1; |
4c576a83 | 43 | }; |
db9f0278 | 44 | |
57a96f5c | 45 | static struct backtrace *backtrace_list; |
244ed907 PE |
46 | |
47 | #if !BYTE_MARK_STACK | |
48 | static | |
49 | #endif | |
db9f0278 JB |
50 | struct catchtag *catchlist; |
51 | ||
244ed907 PE |
52 | /* Chain of condition handlers currently in effect. |
53 | The elements of this chain are contained in the stack frames | |
54 | of Fcondition_case and internal_condition_case. | |
55 | When an error is signaled (by calling Fsignal, below), | |
56 | this chain is searched for an element that applies. */ | |
57 | ||
58 | #if !BYTE_MARK_STACK | |
59 | static | |
60 | #endif | |
61 | struct handler *handlerlist; | |
62 | ||
15934ffa RS |
63 | #ifdef DEBUG_GCPRO |
64 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
65 | int gcpro_level; | |
66 | #endif | |
67 | ||
6fd797f5 | 68 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
29208e82 | 69 | Lisp_Object Qinhibit_quit; |
955cbe7b PE |
70 | Lisp_Object Qand_rest; |
71 | static Lisp_Object Qand_optional; | |
72 | static Lisp_Object Qdebug_on_error; | |
73 | static Lisp_Object Qdeclare; | |
b9598260 SM |
74 | Lisp_Object Qinternal_interpreter_environment, Qclosure; |
75 | ||
ed008a6d | 76 | static Lisp_Object Qdebug; |
db9f0278 | 77 | |
6e6e9f08 RS |
78 | /* This holds either the symbol `run-hooks' or nil. |
79 | It is nil at an early stage of startup, and when Emacs | |
80 | is shutting down. */ | |
4c576a83 | 81 | |
db9f0278 JB |
82 | Lisp_Object Vrun_hooks; |
83 | ||
84 | /* Non-nil means record all fset's and provide's, to be undone | |
85 | if the file being autoloaded is not fully loaded. | |
86 | They are recorded by being consed onto the front of Vautoload_queue: | |
47b82df9 | 87 | (FUN . ODEF) for a defun, (0 . OFEATURES) for a provide. */ |
db9f0278 JB |
88 | |
89 | Lisp_Object Vautoload_queue; | |
90 | ||
91 | /* Current number of specbindings allocated in specpdl. */ | |
4c576a83 | 92 | |
5816888b | 93 | EMACS_INT specpdl_size; |
db9f0278 JB |
94 | |
95 | /* Pointer to beginning of specpdl. */ | |
4c576a83 | 96 | |
db9f0278 JB |
97 | struct specbinding *specpdl; |
98 | ||
99 | /* Pointer to first unused element in specpdl. */ | |
4c576a83 | 100 | |
ab837828 | 101 | struct specbinding *specpdl_ptr; |
db9f0278 | 102 | |
db9f0278 | 103 | /* Depth in Lisp evaluations and function calls. */ |
4c576a83 | 104 | |
57a96f5c | 105 | static EMACS_INT lisp_eval_depth; |
db9f0278 | 106 | |
be857679 | 107 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 108 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 109 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
110 | know that the debugger itself has an error, and we should just |
111 | signal the error instead of entering an infinite loop of debugger | |
112 | invocations. */ | |
4c576a83 | 113 | |
57a96f5c | 114 | static int when_entered_debugger; |
db9f0278 | 115 | |
a2ff3819 GM |
116 | /* The function from which the last `signal' was called. Set in |
117 | Fsignal. */ | |
118 | ||
119 | Lisp_Object Vsignaling_function; | |
120 | ||
4c576a83 GM |
121 | /* Set to non-zero while processing X events. Checked in Feval to |
122 | make sure the Lisp interpreter isn't called from a signal handler, | |
123 | which is unsafe because the interpreter isn't reentrant. */ | |
124 | ||
125 | int handling_signal; | |
126 | ||
f66c7cf8 | 127 | static Lisp_Object funcall_lambda (Lisp_Object, ptrdiff_t, Lisp_Object *); |
f57e2426 | 128 | static void unwind_to_catch (struct catchtag *, Lisp_Object) NO_RETURN; |
2f7c71a1 | 129 | static int interactive_p (int); |
7200d79c | 130 | static Lisp_Object apply_lambda (Lisp_Object fun, Lisp_Object args); |
cd64ea1d | 131 | static Lisp_Object Ffetch_bytecode (Lisp_Object); |
873759d5 | 132 | \f |
dfcf069d | 133 | void |
d3da34e0 | 134 | init_eval_once (void) |
db9f0278 | 135 | { |
98e8eae1 PE |
136 | enum { size = 50 }; |
137 | specpdl = (struct specbinding *) xmalloc (size * sizeof (struct specbinding)); | |
138 | specpdl_size = size; | |
270e8074 | 139 | specpdl_ptr = specpdl; |
6588243d | 140 | /* Don't forget to update docs (lispref node "Local Variables"). */ |
c530e1c2 | 141 | max_specpdl_size = 1300; /* 1000 is not enough for CEDET's c-by.el. */ |
d46f6bbb | 142 | max_lisp_eval_depth = 600; |
34d470ba RS |
143 | |
144 | Vrun_hooks = Qnil; | |
db9f0278 JB |
145 | } |
146 | ||
dfcf069d | 147 | void |
d3da34e0 | 148 | init_eval (void) |
db9f0278 JB |
149 | { |
150 | specpdl_ptr = specpdl; | |
151 | catchlist = 0; | |
152 | handlerlist = 0; | |
153 | backtrace_list = 0; | |
154 | Vquit_flag = Qnil; | |
155 | debug_on_next_call = 0; | |
156 | lisp_eval_depth = 0; | |
87e21fbd | 157 | #ifdef DEBUG_GCPRO |
15934ffa | 158 | gcpro_level = 0; |
87e21fbd | 159 | #endif |
be857679 | 160 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 161 | when_entered_debugger = -1; |
db9f0278 JB |
162 | } |
163 | ||
f6d62986 | 164 | /* Unwind-protect function used by call_debugger. */ |
9f5903bb RS |
165 | |
166 | static Lisp_Object | |
d3da34e0 | 167 | restore_stack_limits (Lisp_Object data) |
9f5903bb RS |
168 | { |
169 | max_specpdl_size = XINT (XCAR (data)); | |
170 | max_lisp_eval_depth = XINT (XCDR (data)); | |
538f78c3 | 171 | return Qnil; |
9f5903bb RS |
172 | } |
173 | ||
174 | /* Call the Lisp debugger, giving it argument ARG. */ | |
175 | ||
475545b5 | 176 | static Lisp_Object |
d3da34e0 | 177 | call_debugger (Lisp_Object arg) |
db9f0278 | 178 | { |
3648c842 | 179 | int debug_while_redisplaying; |
aed13378 | 180 | int count = SPECPDL_INDEX (); |
3648c842 | 181 | Lisp_Object val; |
5816888b | 182 | EMACS_INT old_max = max_specpdl_size; |
177c0ea7 | 183 | |
9f5903bb RS |
184 | /* Temporarily bump up the stack limits, |
185 | so the debugger won't run out of stack. */ | |
177c0ea7 | 186 | |
9f5903bb RS |
187 | max_specpdl_size += 1; |
188 | record_unwind_protect (restore_stack_limits, | |
189 | Fcons (make_number (old_max), | |
190 | make_number (max_lisp_eval_depth))); | |
191 | max_specpdl_size = old_max; | |
192 | ||
193 | if (lisp_eval_depth + 40 > max_lisp_eval_depth) | |
194 | max_lisp_eval_depth = lisp_eval_depth + 40; | |
195 | ||
98e8eae1 | 196 | if (max_specpdl_size - 100 < SPECPDL_INDEX ()) |
9f5903bb | 197 | max_specpdl_size = SPECPDL_INDEX () + 100; |
177c0ea7 | 198 | |
d148e14d | 199 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
200 | if (display_hourglass_p) |
201 | cancel_hourglass (); | |
237c23b0 GM |
202 | #endif |
203 | ||
db9f0278 | 204 | debug_on_next_call = 0; |
be857679 | 205 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
206 | |
207 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
208 | displayed if the debugger is invoked during redisplay. */ | |
209 | debug_while_redisplaying = redisplaying_p; | |
210 | redisplaying_p = 0; | |
556d7314 GM |
211 | specbind (intern ("debugger-may-continue"), |
212 | debug_while_redisplaying ? Qnil : Qt); | |
8efb6cc7 | 213 | specbind (Qinhibit_redisplay, Qnil); |
9f5903bb | 214 | specbind (Qdebug_on_error, Qnil); |
9db6f6b4 GM |
215 | |
216 | #if 0 /* Binding this prevents execution of Lisp code during | |
217 | redisplay, which necessarily leads to display problems. */ | |
8efb6cc7 | 218 | specbind (Qinhibit_eval_during_redisplay, Qt); |
9db6f6b4 | 219 | #endif |
177c0ea7 | 220 | |
3648c842 GM |
221 | val = apply1 (Vdebugger, arg); |
222 | ||
223 | /* Interrupting redisplay and resuming it later is not safe under | |
224 | all circumstances. So, when the debugger returns, abort the | |
1b1acc13 | 225 | interrupted redisplay by going back to the top-level. */ |
3648c842 GM |
226 | if (debug_while_redisplaying) |
227 | Ftop_level (); | |
228 | ||
556d7314 | 229 | return unbind_to (count, val); |
db9f0278 JB |
230 | } |
231 | ||
475545b5 | 232 | static void |
d3da34e0 | 233 | do_debug_on_call (Lisp_Object code) |
db9f0278 JB |
234 | { |
235 | debug_on_next_call = 0; | |
236 | backtrace_list->debug_on_exit = 1; | |
237 | call_debugger (Fcons (code, Qnil)); | |
238 | } | |
239 | \f | |
240 | /* NOTE!!! Every function that can call EVAL must protect its args | |
241 | and temporaries from garbage collection while it needs them. | |
242 | The definition of `For' shows what you have to do. */ | |
243 | ||
244 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
245 | doc: /* Eval args until one of them yields non-nil, then return that value. |
246 | The remaining args are not evalled at all. | |
247 | If all args return nil, return nil. | |
533eb34b | 248 | usage: (or CONDITIONS...) */) |
5842a27b | 249 | (Lisp_Object args) |
db9f0278 | 250 | { |
e509f168 | 251 | register Lisp_Object val = Qnil; |
db9f0278 JB |
252 | struct gcpro gcpro1; |
253 | ||
e509f168 | 254 | GCPRO1 (args); |
db9f0278 | 255 | |
e509f168 | 256 | while (CONSP (args)) |
db9f0278 | 257 | { |
defb1411 | 258 | val = eval_sub (XCAR (args)); |
265a9e55 | 259 | if (!NILP (val)) |
db9f0278 | 260 | break; |
e509f168 | 261 | args = XCDR (args); |
db9f0278 | 262 | } |
db9f0278 JB |
263 | |
264 | UNGCPRO; | |
265 | return val; | |
266 | } | |
267 | ||
268 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
b8de5714 | 269 | doc: /* Eval args until one of them yields nil, then return nil. |
9dbc9081 PJ |
270 | The remaining args are not evalled at all. |
271 | If no arg yields nil, return the last arg's value. | |
533eb34b | 272 | usage: (and CONDITIONS...) */) |
5842a27b | 273 | (Lisp_Object args) |
db9f0278 | 274 | { |
e509f168 | 275 | register Lisp_Object val = Qt; |
db9f0278 JB |
276 | struct gcpro gcpro1; |
277 | ||
e509f168 | 278 | GCPRO1 (args); |
db9f0278 | 279 | |
e509f168 | 280 | while (CONSP (args)) |
db9f0278 | 281 | { |
defb1411 | 282 | val = eval_sub (XCAR (args)); |
265a9e55 | 283 | if (NILP (val)) |
db9f0278 | 284 | break; |
e509f168 | 285 | args = XCDR (args); |
db9f0278 | 286 | } |
db9f0278 JB |
287 | |
288 | UNGCPRO; | |
289 | return val; | |
290 | } | |
291 | ||
292 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
b8de5714 | 293 | doc: /* If COND yields non-nil, do THEN, else do ELSE... |
9dbc9081 PJ |
294 | Returns the value of THEN or the value of the last of the ELSE's. |
295 | THEN must be one expression, but ELSE... can be zero or more expressions. | |
296 | If COND yields nil, and there are no ELSE's, the value is nil. | |
7a25dc6d | 297 | usage: (if COND THEN ELSE...) */) |
5842a27b | 298 | (Lisp_Object args) |
db9f0278 JB |
299 | { |
300 | register Lisp_Object cond; | |
301 | struct gcpro gcpro1; | |
302 | ||
303 | GCPRO1 (args); | |
defb1411 | 304 | cond = eval_sub (Fcar (args)); |
db9f0278 JB |
305 | UNGCPRO; |
306 | ||
265a9e55 | 307 | if (!NILP (cond)) |
defb1411 | 308 | return eval_sub (Fcar (Fcdr (args))); |
db9f0278 JB |
309 | return Fprogn (Fcdr (Fcdr (args))); |
310 | } | |
311 | ||
312 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
313 | doc: /* Try each clause until one succeeds. |
314 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated | |
315 | and, if the value is non-nil, this clause succeeds: | |
316 | then the expressions in BODY are evaluated and the last one's | |
317 | value is the value of the cond-form. | |
318 | If no clause succeeds, cond returns nil. | |
319 | If a clause has one element, as in (CONDITION), | |
320 | CONDITION's value if non-nil is returned from the cond-form. | |
7a25dc6d | 321 | usage: (cond CLAUSES...) */) |
5842a27b | 322 | (Lisp_Object args) |
db9f0278 JB |
323 | { |
324 | register Lisp_Object clause, val; | |
325 | struct gcpro gcpro1; | |
326 | ||
327 | val = Qnil; | |
328 | GCPRO1 (args); | |
265a9e55 | 329 | while (!NILP (args)) |
db9f0278 JB |
330 | { |
331 | clause = Fcar (args); | |
defb1411 | 332 | val = eval_sub (Fcar (clause)); |
265a9e55 | 333 | if (!NILP (val)) |
db9f0278 | 334 | { |
03699b14 KR |
335 | if (!EQ (XCDR (clause), Qnil)) |
336 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
337 | break; |
338 | } | |
03699b14 | 339 | args = XCDR (args); |
db9f0278 JB |
340 | } |
341 | UNGCPRO; | |
342 | ||
343 | return val; | |
344 | } | |
345 | ||
a7ca3326 | 346 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, |
9dbc9081 | 347 | doc: /* Eval BODY forms sequentially and return value of last one. |
5b4a1f50 | 348 | usage: (progn BODY...) */) |
5842a27b | 349 | (Lisp_Object args) |
db9f0278 | 350 | { |
e509f168 | 351 | register Lisp_Object val = Qnil; |
db9f0278 JB |
352 | struct gcpro gcpro1; |
353 | ||
e509f168 | 354 | GCPRO1 (args); |
db9f0278 | 355 | |
e509f168 | 356 | while (CONSP (args)) |
db9f0278 | 357 | { |
defb1411 | 358 | val = eval_sub (XCAR (args)); |
e509f168 | 359 | args = XCDR (args); |
db9f0278 | 360 | } |
db9f0278 JB |
361 | |
362 | UNGCPRO; | |
363 | return val; | |
364 | } | |
365 | ||
366 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
bdee2ef3 | 367 | doc: /* Eval FIRST and BODY sequentially; return value from FIRST. |
9dbc9081 PJ |
368 | The value of FIRST is saved during the evaluation of the remaining args, |
369 | whose values are discarded. | |
7a25dc6d | 370 | usage: (prog1 FIRST BODY...) */) |
5842a27b | 371 | (Lisp_Object args) |
db9f0278 JB |
372 | { |
373 | Lisp_Object val; | |
374 | register Lisp_Object args_left; | |
375 | struct gcpro gcpro1, gcpro2; | |
376 | register int argnum = 0; | |
377 | ||
9ac66b45 | 378 | if (NILP (args)) |
db9f0278 JB |
379 | return Qnil; |
380 | ||
381 | args_left = args; | |
382 | val = Qnil; | |
383 | GCPRO2 (args, val); | |
384 | ||
385 | do | |
386 | { | |
ba83908c | 387 | Lisp_Object tem = eval_sub (XCAR (args_left)); |
db9f0278 | 388 | if (!(argnum++)) |
ba83908c SM |
389 | val = tem; |
390 | args_left = XCDR (args_left); | |
db9f0278 | 391 | } |
ba83908c | 392 | while (CONSP (args_left)); |
db9f0278 JB |
393 | |
394 | UNGCPRO; | |
395 | return val; | |
396 | } | |
397 | ||
398 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
bdee2ef3 | 399 | doc: /* Eval FORM1, FORM2 and BODY sequentially; return value from FORM2. |
82fc29a1 JB |
400 | The value of FORM2 is saved during the evaluation of the |
401 | remaining args, whose values are discarded. | |
402 | usage: (prog2 FORM1 FORM2 BODY...) */) | |
5842a27b | 403 | (Lisp_Object args) |
db9f0278 JB |
404 | { |
405 | Lisp_Object val; | |
406 | register Lisp_Object args_left; | |
407 | struct gcpro gcpro1, gcpro2; | |
408 | register int argnum = -1; | |
409 | ||
410 | val = Qnil; | |
411 | ||
87d238ba | 412 | if (NILP (args)) |
db9f0278 JB |
413 | return Qnil; |
414 | ||
415 | args_left = args; | |
416 | val = Qnil; | |
417 | GCPRO2 (args, val); | |
418 | ||
419 | do | |
420 | { | |
ba83908c | 421 | Lisp_Object tem = eval_sub (XCAR (args_left)); |
db9f0278 | 422 | if (!(argnum++)) |
ba83908c SM |
423 | val = tem; |
424 | args_left = XCDR (args_left); | |
db9f0278 | 425 | } |
ba83908c | 426 | while (CONSP (args_left)); |
db9f0278 JB |
427 | |
428 | UNGCPRO; | |
429 | return val; | |
430 | } | |
431 | ||
432 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
433 | doc: /* Set each SYM to the value of its VAL. |
434 | The symbols SYM are variables; they are literal (not evaluated). | |
435 | The values VAL are expressions; they are evaluated. | |
436 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
437 | The second VAL is not computed until after the first SYM is set, and so on; | |
438 | each VAL can use the new value of variables set earlier in the `setq'. | |
439 | The return value of the `setq' form is the value of the last VAL. | |
819586b2 | 440 | usage: (setq [SYM VAL]...) */) |
5842a27b | 441 | (Lisp_Object args) |
db9f0278 JB |
442 | { |
443 | register Lisp_Object args_left; | |
b9598260 | 444 | register Lisp_Object val, sym, lex_binding; |
db9f0278 JB |
445 | struct gcpro gcpro1; |
446 | ||
1283140e | 447 | if (NILP (args)) |
db9f0278 JB |
448 | return Qnil; |
449 | ||
450 | args_left = args; | |
451 | GCPRO1 (args); | |
452 | ||
453 | do | |
454 | { | |
defb1411 | 455 | val = eval_sub (Fcar (Fcdr (args_left))); |
db9f0278 | 456 | sym = Fcar (args_left); |
b9598260 | 457 | |
defb1411 | 458 | /* Like for eval_sub, we do not check declared_special here since |
f07a954e SM |
459 | it's been done when let-binding. */ |
460 | if (!NILP (Vinternal_interpreter_environment) /* Mere optimization! */ | |
b9598260 | 461 | && SYMBOLP (sym) |
f07a954e SM |
462 | && !NILP (lex_binding |
463 | = Fassq (sym, Vinternal_interpreter_environment))) | |
b9598260 SM |
464 | XSETCDR (lex_binding, val); /* SYM is lexically bound. */ |
465 | else | |
466 | Fset (sym, val); /* SYM is dynamically bound. */ | |
467 | ||
db9f0278 JB |
468 | args_left = Fcdr (Fcdr (args_left)); |
469 | } | |
265a9e55 | 470 | while (!NILP(args_left)); |
db9f0278 JB |
471 | |
472 | UNGCPRO; | |
473 | return val; | |
474 | } | |
177c0ea7 | 475 | |
db9f0278 | 476 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, |
9dbc9081 PJ |
477 | doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'. |
478 | usage: (quote ARG) */) | |
5842a27b | 479 | (Lisp_Object args) |
db9f0278 | 480 | { |
1283140e RS |
481 | if (!NILP (Fcdr (args))) |
482 | xsignal2 (Qwrong_number_of_arguments, Qquote, Flength (args)); | |
db9f0278 JB |
483 | return Fcar (args); |
484 | } | |
177c0ea7 | 485 | |
db9f0278 | 486 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, |
9dbc9081 PJ |
487 | doc: /* Like `quote', but preferred for objects which are functions. |
488 | In byte compilation, `function' causes its argument to be compiled. | |
489 | `quote' cannot do that. | |
490 | usage: (function ARG) */) | |
5842a27b | 491 | (Lisp_Object args) |
db9f0278 | 492 | { |
b9598260 SM |
493 | Lisp_Object quoted = XCAR (args); |
494 | ||
1283140e RS |
495 | if (!NILP (Fcdr (args))) |
496 | xsignal2 (Qwrong_number_of_arguments, Qfunction, Flength (args)); | |
b9598260 SM |
497 | |
498 | if (!NILP (Vinternal_interpreter_environment) | |
499 | && CONSP (quoted) | |
500 | && EQ (XCAR (quoted), Qlambda)) | |
501 | /* This is a lambda expression within a lexical environment; | |
502 | return an interpreted closure instead of a simple lambda. */ | |
23aba0ea SM |
503 | return Fcons (Qclosure, Fcons (Vinternal_interpreter_environment, |
504 | XCDR (quoted))); | |
b9598260 SM |
505 | else |
506 | /* Simply quote the argument. */ | |
507 | return quoted; | |
db9f0278 JB |
508 | } |
509 | ||
e0f331ab | 510 | |
a7ca3326 | 511 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, |
84b17ab0 | 512 | doc: /* Return t if the containing function was run directly by user input. |
82fc29a1 JB |
513 | This means that the function was called with `call-interactively' |
514 | \(which includes being called as the binding of a key) | |
84b17ab0 | 515 | and input is currently coming from the keyboard (not a keyboard macro), |
c63df42b RS |
516 | and Emacs is not running in batch mode (`noninteractive' is nil). |
517 | ||
518 | The only known proper use of `interactive-p' is in deciding whether to | |
519 | display a helpful message, or how to display it. If you're thinking | |
520 | of using it for any other purpose, it is quite likely that you're | |
521 | making a mistake. Think: what do you want to do when the command is | |
522 | called from a keyboard macro? | |
523 | ||
84b17ab0 CY |
524 | To test whether your function was called with `call-interactively', |
525 | either (i) add an extra optional argument and give it an `interactive' | |
526 | spec that specifies non-nil unconditionally (such as \"p\"); or (ii) | |
527 | use `called-interactively-p'. */) | |
5842a27b | 528 | (void) |
db9f0278 | 529 | { |
b9598260 | 530 | return interactive_p (1) ? Qt : Qnil; |
e0f331ab GM |
531 | } |
532 | ||
533 | ||
9d28c33e | 534 | DEFUN ("called-interactively-p", Fcalled_interactively_p, Scalled_interactively_p, 0, 1, 0, |
84b17ab0 | 535 | doc: /* Return t if the containing function was called by `call-interactively'. |
9d28c33e SM |
536 | If KIND is `interactive', then only return t if the call was made |
537 | interactively by the user, i.e. not in `noninteractive' mode nor | |
538 | when `executing-kbd-macro'. | |
539 | If KIND is `any', on the other hand, it will return t for any kind of | |
540 | interactive call, including being called as the binding of a key, or | |
541 | from a keyboard macro, or in `noninteractive' mode. | |
542 | ||
543 | The only known proper use of `interactive' for KIND is in deciding | |
544 | whether to display a helpful message, or how to display it. If you're | |
545 | thinking of using it for any other purpose, it is quite likely that | |
546 | you're making a mistake. Think: what do you want to do when the | |
547 | command is called from a keyboard macro? | |
84b17ab0 CY |
548 | |
549 | This function is meant for implementing advice and other | |
550 | function-modifying features. Instead of using this, it is sometimes | |
551 | cleaner to give your function an extra optional argument whose | |
552 | `interactive' spec specifies non-nil unconditionally (\"p\" is a good | |
9d28c33e | 553 | way to do this), or via (not (or executing-kbd-macro noninteractive)). */) |
5842a27b | 554 | (Lisp_Object kind) |
c63df42b | 555 | { |
9d28c33e SM |
556 | return ((INTERACTIVE || !EQ (kind, intern ("interactive"))) |
557 | && interactive_p (1)) ? Qt : Qnil; | |
c63df42b RS |
558 | } |
559 | ||
560 | ||
561 | /* Return 1 if function in which this appears was called using | |
562 | call-interactively. | |
e0f331ab GM |
563 | |
564 | EXCLUDE_SUBRS_P non-zero means always return 0 if the function | |
565 | called is a built-in. */ | |
566 | ||
2f7c71a1 | 567 | static int |
d3da34e0 | 568 | interactive_p (int exclude_subrs_p) |
e0f331ab GM |
569 | { |
570 | struct backtrace *btp; | |
571 | Lisp_Object fun; | |
db9f0278 | 572 | |
db9f0278 | 573 | btp = backtrace_list; |
daa37602 JB |
574 | |
575 | /* If this isn't a byte-compiled function, there may be a frame at | |
e0f331ab | 576 | the top for Finteractive_p. If so, skip it. */ |
a7f96a35 | 577 | fun = Findirect_function (*btp->function, Qnil); |
0b31741c RS |
578 | if (SUBRP (fun) && (XSUBR (fun) == &Sinteractive_p |
579 | || XSUBR (fun) == &Scalled_interactively_p)) | |
db9f0278 | 580 | btp = btp->next; |
daa37602 JB |
581 | |
582 | /* If we're running an Emacs 18-style byte-compiled function, there | |
4402a9ed RS |
583 | may be a frame for Fbytecode at the top level. In any version of |
584 | Emacs there can be Fbytecode frames for subexpressions evaluated | |
585 | inside catch and condition-case. Skip past them. | |
daa37602 | 586 | |
4402a9ed | 587 | If this isn't a byte-compiled function, then we may now be |
daa37602 | 588 | looking at several frames for special forms. Skip past them. */ |
4402a9ed RS |
589 | while (btp |
590 | && (EQ (*btp->function, Qbytecode) | |
44f230aa | 591 | || btp->nargs == UNEVALLED)) |
a6e3fa71 JB |
592 | btp = btp->next; |
593 | ||
f6d62986 | 594 | /* `btp' now points at the frame of the innermost function that isn't |
daa37602 JB |
595 | a special form, ignoring frames for Finteractive_p and/or |
596 | Fbytecode at the top. If this frame is for a built-in function | |
597 | (such as load or eval-region) return nil. */ | |
a7f96a35 | 598 | fun = Findirect_function (*btp->function, Qnil); |
e0f331ab GM |
599 | if (exclude_subrs_p && SUBRP (fun)) |
600 | return 0; | |
177c0ea7 | 601 | |
f6d62986 | 602 | /* `btp' points to the frame of a Lisp function that called interactive-p. |
db9f0278 JB |
603 | Return t if that function was called interactively. */ |
604 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
e0f331ab GM |
605 | return 1; |
606 | return 0; | |
db9f0278 JB |
607 | } |
608 | ||
e0f331ab | 609 | |
db9f0278 | 610 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, |
9dbc9081 PJ |
611 | doc: /* Define NAME as a function. |
612 | The definition is (lambda ARGLIST [DOCSTRING] BODY...). | |
613 | See also the function `interactive'. | |
7a25dc6d | 614 | usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */) |
5842a27b | 615 | (Lisp_Object args) |
db9f0278 JB |
616 | { |
617 | register Lisp_Object fn_name; | |
618 | register Lisp_Object defn; | |
619 | ||
620 | fn_name = Fcar (args); | |
6992a868 | 621 | CHECK_SYMBOL (fn_name); |
db9f0278 | 622 | defn = Fcons (Qlambda, Fcdr (args)); |
f07a954e SM |
623 | if (!NILP (Vinternal_interpreter_environment)) /* Mere optimization! */ |
624 | defn = Ffunction (Fcons (defn, Qnil)); | |
265a9e55 | 625 | if (!NILP (Vpurify_flag)) |
db9f0278 | 626 | defn = Fpurecopy (defn); |
f58e9f8c RS |
627 | if (CONSP (XSYMBOL (fn_name)->function) |
628 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
629 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 630 | Ffset (fn_name, defn); |
6fd797f5 | 631 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
632 | return fn_name; |
633 | } | |
634 | ||
635 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
9dbc9081 | 636 | doc: /* Define NAME as a macro. |
0654d6e3 RS |
637 | The actual definition looks like |
638 | (macro lambda ARGLIST [DOCSTRING] [DECL] BODY...). | |
9dbc9081 PJ |
639 | When the macro is called, as in (NAME ARGS...), |
640 | the function (lambda ARGLIST BODY...) is applied to | |
641 | the list ARGS... as it appears in the expression, | |
642 | and the result should be a form to be evaluated instead of the original. | |
0654d6e3 RS |
643 | |
644 | DECL is a declaration, optional, which can specify how to indent | |
4ba50634 JPW |
645 | calls to this macro, how Edebug should handle it, and which argument |
646 | should be treated as documentation. It looks like this: | |
0654d6e3 RS |
647 | (declare SPECS...) |
648 | The elements can look like this: | |
649 | (indent INDENT) | |
650 | Set NAME's `lisp-indent-function' property to INDENT. | |
651 | ||
e509f168 | 652 | (debug DEBUG) |
0654d6e3 | 653 | Set NAME's `edebug-form-spec' property to DEBUG. (This is |
7d5c86e5 | 654 | equivalent to writing a `def-edebug-spec' for the macro.) |
4ba50634 JPW |
655 | |
656 | (doc-string ELT) | |
657 | Set NAME's `doc-string-elt' property to ELT. | |
658 | ||
0654d6e3 | 659 | usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */) |
5842a27b | 660 | (Lisp_Object args) |
db9f0278 JB |
661 | { |
662 | register Lisp_Object fn_name; | |
663 | register Lisp_Object defn; | |
d6edd563 | 664 | Lisp_Object lambda_list, doc, tail; |
db9f0278 JB |
665 | |
666 | fn_name = Fcar (args); | |
8e975df9 | 667 | CHECK_SYMBOL (fn_name); |
d6edd563 GM |
668 | lambda_list = Fcar (Fcdr (args)); |
669 | tail = Fcdr (Fcdr (args)); | |
670 | ||
671 | doc = Qnil; | |
672 | if (STRINGP (Fcar (tail))) | |
673 | { | |
e509f168 SM |
674 | doc = XCAR (tail); |
675 | tail = XCDR (tail); | |
d6edd563 GM |
676 | } |
677 | ||
0193499f SM |
678 | if (CONSP (Fcar (tail)) |
679 | && EQ (Fcar (Fcar (tail)), Qdeclare)) | |
d6edd563 GM |
680 | { |
681 | if (!NILP (Vmacro_declaration_function)) | |
682 | { | |
683 | struct gcpro gcpro1; | |
684 | GCPRO1 (args); | |
685 | call2 (Vmacro_declaration_function, fn_name, Fcar (tail)); | |
686 | UNGCPRO; | |
687 | } | |
177c0ea7 | 688 | |
d6edd563 GM |
689 | tail = Fcdr (tail); |
690 | } | |
691 | ||
692 | if (NILP (doc)) | |
693 | tail = Fcons (lambda_list, tail); | |
694 | else | |
695 | tail = Fcons (lambda_list, Fcons (doc, tail)); | |
7200d79c | 696 | |
b9598260 | 697 | defn = Fcons (Qlambda, tail); |
f07a954e SM |
698 | if (!NILP (Vinternal_interpreter_environment)) /* Mere optimization! */ |
699 | defn = Ffunction (Fcons (defn, Qnil)); | |
b9598260 | 700 | defn = Fcons (Qmacro, defn); |
177c0ea7 | 701 | |
265a9e55 | 702 | if (!NILP (Vpurify_flag)) |
db9f0278 | 703 | defn = Fpurecopy (defn); |
f58e9f8c RS |
704 | if (CONSP (XSYMBOL (fn_name)->function) |
705 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
706 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 707 | Ffset (fn_name, defn); |
6fd797f5 | 708 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
709 | return fn_name; |
710 | } | |
711 | ||
19cebf5a | 712 | |
1848d15d | 713 | DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0, |
4a9308b8 | 714 | doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE. |
e102f0d8 | 715 | Aliased variables always have the same value; setting one sets the other. |
4a9308b8 | 716 | Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is |
dd60787c GM |
717 | omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE, |
718 | or of the variable at the end of the chain of aliases, if BASE-VARIABLE is | |
719 | itself an alias. If NEW-ALIAS is bound, and BASE-VARIABLE is not, | |
720 | then the value of BASE-VARIABLE is set to that of NEW-ALIAS. | |
4a9308b8 | 721 | The return value is BASE-VARIABLE. */) |
5842a27b | 722 | (Lisp_Object new_alias, Lisp_Object base_variable, Lisp_Object docstring) |
19cebf5a GM |
723 | { |
724 | struct Lisp_Symbol *sym; | |
1848d15d | 725 | |
4a9308b8 JB |
726 | CHECK_SYMBOL (new_alias); |
727 | CHECK_SYMBOL (base_variable); | |
19cebf5a | 728 | |
4a9308b8 | 729 | sym = XSYMBOL (new_alias); |
ce5b453a SM |
730 | |
731 | if (sym->constant) | |
178f2507 SM |
732 | /* Not sure why, but why not? */ |
733 | error ("Cannot make a constant an alias"); | |
ce5b453a SM |
734 | |
735 | switch (sym->redirect) | |
736 | { | |
737 | case SYMBOL_FORWARDED: | |
738 | error ("Cannot make an internal variable an alias"); | |
739 | case SYMBOL_LOCALIZED: | |
740 | error ("Don't know how to make a localized variable an alias"); | |
741 | } | |
742 | ||
dd60787c | 743 | /* http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00834.html |
ce5b453a SM |
744 | If n_a is bound, but b_v is not, set the value of b_v to n_a, |
745 | so that old-code that affects n_a before the aliasing is setup | |
746 | still works. */ | |
747 | if (NILP (Fboundp (base_variable))) | |
94b612ad | 748 | set_internal (base_variable, find_symbol_value (new_alias), Qnil, 1); |
ce5b453a SM |
749 | |
750 | { | |
751 | struct specbinding *p; | |
752 | ||
753 | for (p = specpdl_ptr - 1; p >= specpdl; p--) | |
754 | if (p->func == NULL | |
755 | && (EQ (new_alias, | |
756 | CONSP (p->symbol) ? XCAR (p->symbol) : p->symbol))) | |
757 | error ("Don't know how to make a let-bound variable an alias"); | |
758 | } | |
759 | ||
b9598260 | 760 | sym->declared_special = 1; |
0ac30604 | 761 | XSYMBOL (base_variable)->declared_special = 1; |
ce5b453a SM |
762 | sym->redirect = SYMBOL_VARALIAS; |
763 | SET_SYMBOL_ALIAS (sym, XSYMBOL (base_variable)); | |
4a9308b8 JB |
764 | sym->constant = SYMBOL_CONSTANT_P (base_variable); |
765 | LOADHIST_ATTACH (new_alias); | |
ce5b453a SM |
766 | /* Even if docstring is nil: remove old docstring. */ |
767 | Fput (new_alias, Qvariable_documentation, docstring); | |
1848d15d | 768 | |
4a9308b8 | 769 | return base_variable; |
19cebf5a GM |
770 | } |
771 | ||
772 | ||
db9f0278 | 773 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, |
29357847 | 774 | doc: /* Define SYMBOL as a variable, and return SYMBOL. |
9dbc9081 PJ |
775 | You are not required to define a variable in order to use it, |
776 | but the definition can supply documentation and an initial value | |
777 | in a way that tags can recognize. | |
778 | ||
779 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void. | |
780 | If SYMBOL is buffer-local, its default value is what is set; | |
781 | buffer-local values are not affected. | |
782 | INITVALUE and DOCSTRING are optional. | |
783 | If DOCSTRING starts with *, this variable is identified as a user option. | |
784 | This means that M-x set-variable recognizes it. | |
785 | See also `user-variable-p'. | |
786 | If INITVALUE is missing, SYMBOL's value is not set. | |
733f68b6 LT |
787 | |
788 | If SYMBOL has a local binding, then this form affects the local | |
789 | binding. This is usually not what you want. Thus, if you need to | |
790 | load a file defining variables, with this form or with `defconst' or | |
791 | `defcustom', you should always load that file _outside_ any bindings | |
792 | for these variables. \(`defconst' and `defcustom' behave similarly in | |
793 | this respect.) | |
2df5238c | 794 | usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */) |
5842a27b | 795 | (Lisp_Object args) |
db9f0278 | 796 | { |
a42ba017 | 797 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
798 | |
799 | sym = Fcar (args); | |
a42ba017 RS |
800 | tail = Fcdr (args); |
801 | if (!NILP (Fcdr (Fcdr (tail)))) | |
921baa95 | 802 | error ("Too many arguments"); |
a42ba017 | 803 | |
33568849 | 804 | tem = Fdefault_boundp (sym); |
a42ba017 | 805 | if (!NILP (tail)) |
db9f0278 | 806 | { |
ba83908c SM |
807 | /* Do it before evaluating the initial value, for self-references. */ |
808 | XSYMBOL (sym)->declared_special = 1; | |
590130fb | 809 | |
1c9916a1 SM |
810 | if (SYMBOL_CONSTANT_P (sym)) |
811 | { | |
812 | /* For upward compatibility, allow (defvar :foo (quote :foo)). */ | |
1faed8ae PE |
813 | Lisp_Object tem1 = Fcar (tail); |
814 | if (! (CONSP (tem1) | |
815 | && EQ (XCAR (tem1), Qquote) | |
816 | && CONSP (XCDR (tem1)) | |
817 | && EQ (XCAR (XCDR (tem1)), sym))) | |
1c9916a1 SM |
818 | error ("Constant symbol `%s' specified in defvar", |
819 | SDATA (SYMBOL_NAME (sym))); | |
820 | } | |
821 | ||
265a9e55 | 822 | if (NILP (tem)) |
defb1411 | 823 | Fset_default (sym, eval_sub (Fcar (tail))); |
d0bce91e SM |
824 | else |
825 | { /* Check if there is really a global binding rather than just a let | |
826 | binding that shadows the global unboundness of the var. */ | |
b28d0d9a | 827 | volatile struct specbinding *pdl = specpdl_ptr; |
d0bce91e SM |
828 | while (--pdl >= specpdl) |
829 | { | |
830 | if (EQ (pdl->symbol, sym) && !pdl->func | |
831 | && EQ (pdl->old_value, Qunbound)) | |
832 | { | |
833 | message_with_string ("Warning: defvar ignored because %s is let-bound", | |
834 | SYMBOL_NAME (sym), 1); | |
835 | break; | |
836 | } | |
837 | } | |
838 | } | |
33568849 | 839 | tail = Fcdr (tail); |
e509f168 SM |
840 | tem = Fcar (tail); |
841 | if (!NILP (tem)) | |
33568849 | 842 | { |
33568849 SM |
843 | if (!NILP (Vpurify_flag)) |
844 | tem = Fpurecopy (tem); | |
845 | Fput (sym, Qvariable_documentation, tem); | |
846 | } | |
6fd797f5 | 847 | LOADHIST_ATTACH (sym); |
db9f0278 | 848 | } |
f07a954e SM |
849 | else if (!NILP (Vinternal_interpreter_environment) |
850 | && !XSYMBOL (sym)->declared_special) | |
851 | /* A simple (defvar foo) with lexical scoping does "nothing" except | |
852 | declare that var to be dynamically scoped *locally* (i.e. within | |
853 | the current file or let-block). */ | |
854 | Vinternal_interpreter_environment = | |
855 | Fcons (sym, Vinternal_interpreter_environment); | |
33568849 | 856 | else |
d28a2170 PE |
857 | { |
858 | /* Simple (defvar <var>) should not count as a definition at all. | |
859 | It could get in the way of other definitions, and unloading this | |
860 | package could try to make the variable unbound. */ | |
861 | } | |
addf35fd | 862 | |
db9f0278 JB |
863 | return sym; |
864 | } | |
865 | ||
866 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
867 | doc: /* Define SYMBOL as a constant variable. |
868 | The intent is that neither programs nor users should ever change this value. | |
869 | Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
870 | If SYMBOL is buffer-local, its default value is what is set; | |
871 | buffer-local values are not affected. | |
872 | DOCSTRING is optional. | |
733f68b6 LT |
873 | |
874 | If SYMBOL has a local binding, then this form sets the local binding's | |
875 | value. However, you should normally not make local bindings for | |
876 | variables defined with this form. | |
7a25dc6d | 877 | usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */) |
5842a27b | 878 | (Lisp_Object args) |
db9f0278 JB |
879 | { |
880 | register Lisp_Object sym, tem; | |
881 | ||
882 | sym = Fcar (args); | |
a42ba017 | 883 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
921baa95 | 884 | error ("Too many arguments"); |
a42ba017 | 885 | |
defb1411 | 886 | tem = eval_sub (Fcar (Fcdr (args))); |
1182a7cb DL |
887 | if (!NILP (Vpurify_flag)) |
888 | tem = Fpurecopy (tem); | |
889 | Fset_default (sym, tem); | |
b9598260 | 890 | XSYMBOL (sym)->declared_special = 1; |
db9f0278 | 891 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 892 | if (!NILP (tem)) |
db9f0278 | 893 | { |
265a9e55 | 894 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
895 | tem = Fpurecopy (tem); |
896 | Fput (sym, Qvariable_documentation, tem); | |
897 | } | |
873759d5 | 898 | Fput (sym, Qrisky_local_variable, Qt); |
6fd797f5 | 899 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
900 | return sym; |
901 | } | |
902 | ||
606cdb89 JB |
903 | /* Error handler used in Fuser_variable_p. */ |
904 | static Lisp_Object | |
d3da34e0 | 905 | user_variable_p_eh (Lisp_Object ignore) |
606cdb89 JB |
906 | { |
907 | return Qnil; | |
908 | } | |
909 | ||
40a69fac SM |
910 | static Lisp_Object |
911 | lisp_indirect_variable (Lisp_Object sym) | |
912 | { | |
cfcbfb1a PE |
913 | struct Lisp_Symbol *s = indirect_variable (XSYMBOL (sym)); |
914 | XSETSYMBOL (sym, s); | |
40a69fac SM |
915 | return sym; |
916 | } | |
917 | ||
db9f0278 | 918 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, |
606cdb89 | 919 | doc: /* Return t if VARIABLE is intended to be set and modified by users. |
9dbc9081 | 920 | \(The alternative is a variable used internally in a Lisp program.) |
606cdb89 JB |
921 | A variable is a user variable if |
922 | \(1) the first character of its documentation is `*', or | |
923 | \(2) it is customizable (its property list contains a non-nil value | |
924 | of `standard-value' or `custom-autoload'), or | |
925 | \(3) it is an alias for another user variable. | |
926 | Return nil if VARIABLE is an alias and there is a loop in the | |
927 | chain of symbols. */) | |
5842a27b | 928 | (Lisp_Object variable) |
db9f0278 JB |
929 | { |
930 | Lisp_Object documentation; | |
177c0ea7 | 931 | |
5e78e475 RS |
932 | if (!SYMBOLP (variable)) |
933 | return Qnil; | |
934 | ||
606cdb89 | 935 | /* If indirect and there's an alias loop, don't check anything else. */ |
ce5b453a | 936 | if (XSYMBOL (variable)->redirect == SYMBOL_VARALIAS |
40a69fac | 937 | && NILP (internal_condition_case_1 (lisp_indirect_variable, variable, |
bb8e180f | 938 | Qt, user_variable_p_eh))) |
606cdb89 JB |
939 | return Qnil; |
940 | ||
941 | while (1) | |
942 | { | |
943 | documentation = Fget (variable, Qvariable_documentation); | |
944 | if (INTEGERP (documentation) && XINT (documentation) < 0) | |
bb8e180f | 945 | return Qt; |
606cdb89 | 946 | if (STRINGP (documentation) |
bb8e180f AS |
947 | && ((unsigned char) SREF (documentation, 0) == '*')) |
948 | return Qt; | |
606cdb89 JB |
949 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ |
950 | if (CONSP (documentation) | |
bb8e180f AS |
951 | && STRINGP (XCAR (documentation)) |
952 | && INTEGERP (XCDR (documentation)) | |
953 | && XINT (XCDR (documentation)) < 0) | |
954 | return Qt; | |
606cdb89 JB |
955 | /* Customizable? See `custom-variable-p'. */ |
956 | if ((!NILP (Fget (variable, intern ("standard-value")))) | |
bb8e180f AS |
957 | || (!NILP (Fget (variable, intern ("custom-autoload"))))) |
958 | return Qt; | |
606cdb89 | 959 | |
ce5b453a | 960 | if (!(XSYMBOL (variable)->redirect == SYMBOL_VARALIAS)) |
bb8e180f | 961 | return Qnil; |
606cdb89 JB |
962 | |
963 | /* An indirect variable? Let's follow the chain. */ | |
ce5b453a | 964 | XSETSYMBOL (variable, SYMBOL_ALIAS (XSYMBOL (variable))); |
606cdb89 | 965 | } |
177c0ea7 | 966 | } |
db9f0278 JB |
967 | \f |
968 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
969 | doc: /* Bind variables according to VARLIST then eval BODY. |
970 | The value of the last form in BODY is returned. | |
971 | Each element of VARLIST is a symbol (which is bound to nil) | |
972 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
973 | Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
7a25dc6d | 974 | usage: (let* VARLIST BODY...) */) |
5842a27b | 975 | (Lisp_Object args) |
db9f0278 | 976 | { |
b9598260 | 977 | Lisp_Object varlist, var, val, elt, lexenv; |
aed13378 | 978 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
979 | struct gcpro gcpro1, gcpro2, gcpro3; |
980 | ||
981 | GCPRO3 (args, elt, varlist); | |
982 | ||
b9598260 SM |
983 | lexenv = Vinternal_interpreter_environment; |
984 | ||
db9f0278 | 985 | varlist = Fcar (args); |
b9598260 | 986 | while (CONSP (varlist)) |
db9f0278 JB |
987 | { |
988 | QUIT; | |
b9598260 SM |
989 | |
990 | elt = XCAR (varlist); | |
90165123 | 991 | if (SYMBOLP (elt)) |
b9598260 SM |
992 | { |
993 | var = elt; | |
994 | val = Qnil; | |
995 | } | |
08564963 | 996 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 997 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
998 | else |
999 | { | |
b9598260 | 1000 | var = Fcar (elt); |
defb1411 | 1001 | val = eval_sub (Fcar (Fcdr (elt))); |
db9f0278 | 1002 | } |
b9598260 | 1003 | |
f07a954e SM |
1004 | if (!NILP (lexenv) && SYMBOLP (var) |
1005 | && !XSYMBOL (var)->declared_special | |
1006 | && NILP (Fmemq (var, Vinternal_interpreter_environment))) | |
b9598260 SM |
1007 | /* Lexically bind VAR by adding it to the interpreter's binding |
1008 | alist. */ | |
1009 | { | |
f07a954e SM |
1010 | Lisp_Object newenv |
1011 | = Fcons (Fcons (var, val), Vinternal_interpreter_environment); | |
1012 | if (EQ (Vinternal_interpreter_environment, lexenv)) | |
1013 | /* Save the old lexical environment on the specpdl stack, | |
1014 | but only for the first lexical binding, since we'll never | |
1015 | need to revert to one of the intermediate ones. */ | |
1016 | specbind (Qinternal_interpreter_environment, newenv); | |
1017 | else | |
1018 | Vinternal_interpreter_environment = newenv; | |
db9f0278 | 1019 | } |
b9598260 SM |
1020 | else |
1021 | specbind (var, val); | |
1022 | ||
1023 | varlist = XCDR (varlist); | |
db9f0278 JB |
1024 | } |
1025 | UNGCPRO; | |
1026 | val = Fprogn (Fcdr (args)); | |
1027 | return unbind_to (count, val); | |
1028 | } | |
1029 | ||
1030 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1031 | doc: /* Bind variables according to VARLIST then eval BODY. |
1032 | The value of the last form in BODY is returned. | |
1033 | Each element of VARLIST is a symbol (which is bound to nil) | |
1034 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
1035 | All the VALUEFORMs are evalled before any symbols are bound. | |
7a25dc6d | 1036 | usage: (let VARLIST BODY...) */) |
5842a27b | 1037 | (Lisp_Object args) |
db9f0278 | 1038 | { |
b9598260 | 1039 | Lisp_Object *temps, tem, lexenv; |
db9f0278 | 1040 | register Lisp_Object elt, varlist; |
aed13378 | 1041 | int count = SPECPDL_INDEX (); |
f66c7cf8 | 1042 | ptrdiff_t argnum; |
db9f0278 | 1043 | struct gcpro gcpro1, gcpro2; |
3a7a9129 | 1044 | USE_SAFE_ALLOCA; |
db9f0278 JB |
1045 | |
1046 | varlist = Fcar (args); | |
1047 | ||
f6d62986 | 1048 | /* Make space to hold the values to give the bound variables. */ |
db9f0278 | 1049 | elt = Flength (varlist); |
b72e0717 | 1050 | SAFE_ALLOCA_LISP (temps, XFASTINT (elt)); |
db9f0278 | 1051 | |
f6d62986 | 1052 | /* Compute the values and store them in `temps'. */ |
db9f0278 JB |
1053 | |
1054 | GCPRO2 (args, *temps); | |
1055 | gcpro2.nvars = 0; | |
1056 | ||
67ee9f6e | 1057 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 JB |
1058 | { |
1059 | QUIT; | |
67ee9f6e | 1060 | elt = XCAR (varlist); |
90165123 | 1061 | if (SYMBOLP (elt)) |
db9f0278 | 1062 | temps [argnum++] = Qnil; |
08564963 | 1063 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1064 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 | 1065 | else |
defb1411 | 1066 | temps [argnum++] = eval_sub (Fcar (Fcdr (elt))); |
db9f0278 JB |
1067 | gcpro2.nvars = argnum; |
1068 | } | |
1069 | UNGCPRO; | |
1070 | ||
b9598260 SM |
1071 | lexenv = Vinternal_interpreter_environment; |
1072 | ||
db9f0278 | 1073 | varlist = Fcar (args); |
67ee9f6e | 1074 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 | 1075 | { |
b9598260 SM |
1076 | Lisp_Object var; |
1077 | ||
67ee9f6e | 1078 | elt = XCAR (varlist); |
b9598260 | 1079 | var = SYMBOLP (elt) ? elt : Fcar (elt); |
db9f0278 | 1080 | tem = temps[argnum++]; |
b9598260 | 1081 | |
f07a954e SM |
1082 | if (!NILP (lexenv) && SYMBOLP (var) |
1083 | && !XSYMBOL (var)->declared_special | |
1084 | && NILP (Fmemq (var, Vinternal_interpreter_environment))) | |
b9598260 SM |
1085 | /* Lexically bind VAR by adding it to the lexenv alist. */ |
1086 | lexenv = Fcons (Fcons (var, tem), lexenv); | |
db9f0278 | 1087 | else |
b9598260 SM |
1088 | /* Dynamically bind VAR. */ |
1089 | specbind (var, tem); | |
db9f0278 JB |
1090 | } |
1091 | ||
b9598260 SM |
1092 | if (!EQ (lexenv, Vinternal_interpreter_environment)) |
1093 | /* Instantiate a new lexical environment. */ | |
1094 | specbind (Qinternal_interpreter_environment, lexenv); | |
1095 | ||
db9f0278 | 1096 | elt = Fprogn (Fcdr (args)); |
3a7a9129 | 1097 | SAFE_FREE (); |
db9f0278 JB |
1098 | return unbind_to (count, elt); |
1099 | } | |
1100 | ||
1101 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1102 | doc: /* If TEST yields non-nil, eval BODY... and repeat. |
1103 | The order of execution is thus TEST, BODY, TEST, BODY and so on | |
1104 | until TEST returns nil. | |
7a25dc6d | 1105 | usage: (while TEST BODY...) */) |
5842a27b | 1106 | (Lisp_Object args) |
db9f0278 | 1107 | { |
2b9bde76 | 1108 | Lisp_Object test, body; |
db9f0278 JB |
1109 | struct gcpro gcpro1, gcpro2; |
1110 | ||
1111 | GCPRO2 (test, body); | |
1112 | ||
1113 | test = Fcar (args); | |
1114 | body = Fcdr (args); | |
defb1411 | 1115 | while (!NILP (eval_sub (test))) |
db9f0278 JB |
1116 | { |
1117 | QUIT; | |
1118 | Fprogn (body); | |
1119 | } | |
1120 | ||
1121 | UNGCPRO; | |
1122 | return Qnil; | |
1123 | } | |
1124 | ||
1125 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
9dbc9081 PJ |
1126 | doc: /* Return result of expanding macros at top level of FORM. |
1127 | If FORM is not a macro call, it is returned unchanged. | |
1128 | Otherwise, the macro is expanded and the expansion is considered | |
1129 | in place of FORM. When a non-macro-call results, it is returned. | |
1130 | ||
1131 | The second optional arg ENVIRONMENT specifies an environment of macro | |
1132 | definitions to shadow the loaded ones for use in file byte-compilation. */) | |
5842a27b | 1133 | (Lisp_Object form, Lisp_Object environment) |
db9f0278 | 1134 | { |
23d6b5a6 | 1135 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
1136 | register Lisp_Object expander, sym, def, tem; |
1137 | ||
1138 | while (1) | |
1139 | { | |
1140 | /* Come back here each time we expand a macro call, | |
1141 | in case it expands into another macro call. */ | |
90165123 | 1142 | if (!CONSP (form)) |
db9f0278 | 1143 | break; |
23d6b5a6 | 1144 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 1145 | def = sym = XCAR (form); |
23d6b5a6 | 1146 | tem = Qnil; |
db9f0278 JB |
1147 | /* Trace symbols aliases to other symbols |
1148 | until we get a symbol that is not an alias. */ | |
90165123 | 1149 | while (SYMBOLP (def)) |
db9f0278 JB |
1150 | { |
1151 | QUIT; | |
23d6b5a6 | 1152 | sym = def; |
79e8bfbf | 1153 | tem = Fassq (sym, environment); |
265a9e55 | 1154 | if (NILP (tem)) |
db9f0278 JB |
1155 | { |
1156 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
1157 | if (!EQ (def, Qunbound)) |
1158 | continue; | |
db9f0278 | 1159 | } |
23d6b5a6 | 1160 | break; |
db9f0278 | 1161 | } |
79e8bfbf | 1162 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 1163 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 1164 | if (NILP (tem)) |
db9f0278 | 1165 | { |
79e8bfbf | 1166 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 1167 | Look at its function definition. */ |
90165123 | 1168 | if (EQ (def, Qunbound) || !CONSP (def)) |
f6d62986 | 1169 | /* Not defined or definition not suitable. */ |
db9f0278 | 1170 | break; |
03699b14 | 1171 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
1172 | { |
1173 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 1174 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 1175 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
1176 | /* Yes, load it and try again. */ |
1177 | { | |
ca20916b RS |
1178 | struct gcpro gcpro1; |
1179 | GCPRO1 (form); | |
ee9ee63c | 1180 | do_autoload (def, sym); |
ca20916b | 1181 | UNGCPRO; |
ee9ee63c JB |
1182 | continue; |
1183 | } | |
1184 | else | |
db9f0278 | 1185 | break; |
db9f0278 | 1186 | } |
03699b14 | 1187 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 1188 | break; |
03699b14 | 1189 | else expander = XCDR (def); |
db9f0278 JB |
1190 | } |
1191 | else | |
1192 | { | |
03699b14 | 1193 | expander = XCDR (tem); |
265a9e55 | 1194 | if (NILP (expander)) |
db9f0278 JB |
1195 | break; |
1196 | } | |
03699b14 | 1197 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
1198 | } |
1199 | return form; | |
1200 | } | |
1201 | \f | |
1202 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1203 | doc: /* Eval BODY allowing nonlocal exits using `throw'. |
1204 | TAG is evalled to get the tag to use; it must not be nil. | |
1205 | ||
1206 | Then the BODY is executed. | |
1d632ccf | 1207 | Within BODY, a call to `throw' with the same TAG exits BODY and this `catch'. |
9dbc9081 PJ |
1208 | If no throw happens, `catch' returns the value of the last BODY form. |
1209 | If a throw happens, it specifies the value to return from `catch'. | |
7a25dc6d | 1210 | usage: (catch TAG BODY...) */) |
5842a27b | 1211 | (Lisp_Object args) |
db9f0278 JB |
1212 | { |
1213 | register Lisp_Object tag; | |
1214 | struct gcpro gcpro1; | |
1215 | ||
1216 | GCPRO1 (args); | |
defb1411 | 1217 | tag = eval_sub (Fcar (args)); |
db9f0278 JB |
1218 | UNGCPRO; |
1219 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
1220 | } | |
1221 | ||
1222 | /* Set up a catch, then call C function FUNC on argument ARG. | |
1223 | FUNC should return a Lisp_Object. | |
1224 | This is how catches are done from within C code. */ | |
1225 | ||
1226 | Lisp_Object | |
d3da34e0 | 1227 | internal_catch (Lisp_Object tag, Lisp_Object (*func) (Lisp_Object), Lisp_Object arg) |
db9f0278 JB |
1228 | { |
1229 | /* This structure is made part of the chain `catchlist'. */ | |
1230 | struct catchtag c; | |
1231 | ||
1232 | /* Fill in the components of c, and put it on the list. */ | |
1233 | c.next = catchlist; | |
1234 | c.tag = tag; | |
1235 | c.val = Qnil; | |
1236 | c.backlist = backtrace_list; | |
1237 | c.handlerlist = handlerlist; | |
1238 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1239 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1240 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1241 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1242 | c.gcpro = gcprolist; |
bcf28080 | 1243 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1244 | catchlist = &c; |
1245 | ||
1246 | /* Call FUNC. */ | |
1247 | if (! _setjmp (c.jmp)) | |
1248 | c.val = (*func) (arg); | |
1249 | ||
1250 | /* Throw works by a longjmp that comes right here. */ | |
1251 | catchlist = c.next; | |
1252 | return c.val; | |
1253 | } | |
1254 | ||
ba410f40 JB |
1255 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1256 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1257 | |
ba410f40 JB |
1258 | This is the guts Fthrow and Fsignal; they differ only in the way |
1259 | they choose the catch tag to throw to. A catch tag for a | |
1260 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1261 | |
ba410f40 JB |
1262 | Before each catch is discarded, unbind all special bindings and |
1263 | execute all unwind-protect clauses made above that catch. Unwind | |
1264 | the handler stack as we go, so that the proper handlers are in | |
1265 | effect for each unwind-protect clause we run. At the end, restore | |
1266 | some static info saved in CATCH, and longjmp to the location | |
1267 | specified in the | |
1268 | ||
1269 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
1270 | |
1271 | static void | |
d3da34e0 | 1272 | unwind_to_catch (struct catchtag *catch, Lisp_Object value) |
db9f0278 JB |
1273 | { |
1274 | register int last_time; | |
1275 | ||
ba410f40 JB |
1276 | /* Save the value in the tag. */ |
1277 | catch->val = value; | |
1278 | ||
0b31741c | 1279 | /* Restore certain special C variables. */ |
1cdc3155 | 1280 | set_poll_suppress_count (catch->poll_suppress_count); |
c1788fbc | 1281 | UNBLOCK_INPUT_TO (catch->interrupt_input_blocked); |
0b31741c | 1282 | handling_signal = 0; |
69bbd6bd | 1283 | immediate_quit = 0; |
82da7701 | 1284 | |
db9f0278 JB |
1285 | do |
1286 | { | |
1287 | last_time = catchlist == catch; | |
82da7701 JB |
1288 | |
1289 | /* Unwind the specpdl stack, and then restore the proper set of | |
bb8e180f | 1290 | handlers. */ |
db9f0278 JB |
1291 | unbind_to (catchlist->pdlcount, Qnil); |
1292 | handlerlist = catchlist->handlerlist; | |
1293 | catchlist = catchlist->next; | |
1294 | } | |
1295 | while (! last_time); | |
1296 | ||
a2a103bb | 1297 | #if HAVE_X_WINDOWS |
88019a63 RS |
1298 | /* If x_catch_errors was done, turn it off now. |
1299 | (First we give unbind_to a chance to do that.) */ | |
e6aee454 | 1300 | #if 0 /* This would disable x_catch_errors after x_connection_closed. |
bb8e180f AS |
1301 | The catch must remain in effect during that delicate |
1302 | state. --lorentey */ | |
88019a63 | 1303 | x_fully_uncatch_errors (); |
e6aee454 | 1304 | #endif |
a2a103bb | 1305 | #endif |
88019a63 | 1306 | |
bcf28080 | 1307 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1308 | gcprolist = catch->gcpro; |
15934ffa | 1309 | #ifdef DEBUG_GCPRO |
d8e2b5ba | 1310 | gcpro_level = gcprolist ? gcprolist->level + 1 : 0; |
15934ffa | 1311 | #endif |
db9f0278 JB |
1312 | backtrace_list = catch->backlist; |
1313 | lisp_eval_depth = catch->lisp_eval_depth; | |
177c0ea7 | 1314 | |
ba410f40 | 1315 | _longjmp (catch->jmp, 1); |
db9f0278 JB |
1316 | } |
1317 | ||
a7ca3326 | 1318 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, |
9dbc9081 PJ |
1319 | doc: /* Throw to the catch for TAG and return VALUE from it. |
1320 | Both TAG and VALUE are evalled. */) | |
5842a27b | 1321 | (register Lisp_Object tag, Lisp_Object value) |
db9f0278 JB |
1322 | { |
1323 | register struct catchtag *c; | |
1324 | ||
8788120f KS |
1325 | if (!NILP (tag)) |
1326 | for (c = catchlist; c; c = c->next) | |
1327 | { | |
1328 | if (EQ (c->tag, tag)) | |
1329 | unwind_to_catch (c, value); | |
1330 | } | |
734d55a2 | 1331 | xsignal2 (Qno_catch, tag, value); |
db9f0278 JB |
1332 | } |
1333 | ||
1334 | ||
1335 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1336 | doc: /* Do BODYFORM, protecting with UNWINDFORMS. |
1337 | If BODYFORM completes normally, its value is returned | |
1338 | after executing the UNWINDFORMS. | |
1339 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
7a25dc6d | 1340 | usage: (unwind-protect BODYFORM UNWINDFORMS...) */) |
5842a27b | 1341 | (Lisp_Object args) |
db9f0278 JB |
1342 | { |
1343 | Lisp_Object val; | |
aed13378 | 1344 | int count = SPECPDL_INDEX (); |
db9f0278 | 1345 | |
04b28167 | 1346 | record_unwind_protect (Fprogn, Fcdr (args)); |
defb1411 | 1347 | val = eval_sub (Fcar (args)); |
177c0ea7 | 1348 | return unbind_to (count, val); |
db9f0278 JB |
1349 | } |
1350 | \f | |
db9f0278 | 1351 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, |
9dbc9081 | 1352 | doc: /* Regain control when an error is signaled. |
1b1acc13 | 1353 | Executes BODYFORM and returns its value if no error happens. |
9dbc9081 PJ |
1354 | Each element of HANDLERS looks like (CONDITION-NAME BODY...) |
1355 | where the BODY is made of Lisp expressions. | |
1356 | ||
1357 | A handler is applicable to an error | |
1358 | if CONDITION-NAME is one of the error's condition names. | |
1359 | If an error happens, the first applicable handler is run. | |
1360 | ||
024a2d76 CY |
1361 | The car of a handler may be a list of condition names instead of a |
1362 | single condition name; then it handles all of them. If the special | |
1363 | condition name `debug' is present in this list, it allows another | |
1364 | condition in the list to run the debugger if `debug-on-error' and the | |
1365 | other usual mechanisms says it should (otherwise, `condition-case' | |
1366 | suppresses the debugger). | |
9dbc9081 | 1367 | |
c997bb25 RS |
1368 | When a handler handles an error, control returns to the `condition-case' |
1369 | and it executes the handler's BODY... | |
d0acbbaf | 1370 | with VAR bound to (ERROR-SYMBOL . SIGNAL-DATA) from the error. |
bb8e180f | 1371 | \(If VAR is nil, the handler can't access that information.) |
c997bb25 RS |
1372 | Then the value of the last BODY form is returned from the `condition-case' |
1373 | expression. | |
9dbc9081 | 1374 | |
9dbc9081 | 1375 | See also the function `signal' for more info. |
2b47b74d | 1376 | usage: (condition-case VAR BODYFORM &rest HANDLERS) */) |
bb8e180f | 1377 | (Lisp_Object args) |
db9f0278 | 1378 | { |
17401c97 GM |
1379 | register Lisp_Object bodyform, handlers; |
1380 | volatile Lisp_Object var; | |
db9f0278 | 1381 | |
82da7701 JB |
1382 | var = Fcar (args); |
1383 | bodyform = Fcar (Fcdr (args)); | |
1384 | handlers = Fcdr (Fcdr (args)); | |
ee830945 RS |
1385 | |
1386 | return internal_lisp_condition_case (var, bodyform, handlers); | |
1387 | } | |
1388 | ||
1389 | /* Like Fcondition_case, but the args are separate | |
1390 | rather than passed in a list. Used by Fbyte_code. */ | |
1391 | ||
1392 | Lisp_Object | |
d3da34e0 JB |
1393 | internal_lisp_condition_case (volatile Lisp_Object var, Lisp_Object bodyform, |
1394 | Lisp_Object handlers) | |
ee830945 RS |
1395 | { |
1396 | Lisp_Object val; | |
1397 | struct catchtag c; | |
1398 | struct handler h; | |
1399 | ||
b7826503 | 1400 | CHECK_SYMBOL (var); |
82da7701 | 1401 | |
2b47b74d | 1402 | for (val = handlers; CONSP (val); val = XCDR (val)) |
82da7701 JB |
1403 | { |
1404 | Lisp_Object tem; | |
2b47b74d | 1405 | tem = XCAR (val); |
5f96776a RS |
1406 | if (! (NILP (tem) |
1407 | || (CONSP (tem) | |
03699b14 KR |
1408 | && (SYMBOLP (XCAR (tem)) |
1409 | || CONSP (XCAR (tem)))))) | |
e6c3da20 EZ |
1410 | error ("Invalid condition handler: %s", |
1411 | SDATA (Fprin1_to_string (tem, Qt))); | |
82da7701 | 1412 | } |
db9f0278 JB |
1413 | |
1414 | c.tag = Qnil; | |
1415 | c.val = Qnil; | |
1416 | c.backlist = backtrace_list; | |
1417 | c.handlerlist = handlerlist; | |
1418 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1419 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1420 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1421 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1422 | c.gcpro = gcprolist; |
bcf28080 | 1423 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1424 | if (_setjmp (c.jmp)) |
1425 | { | |
265a9e55 | 1426 | if (!NILP (h.var)) |
bb8e180f | 1427 | specbind (h.var, c.val); |
9d58218c | 1428 | val = Fprogn (Fcdr (h.chosen_clause)); |
82da7701 JB |
1429 | |
1430 | /* Note that this just undoes the binding of h.var; whoever | |
1431 | longjumped to us unwound the stack to c.pdlcount before | |
1432 | throwing. */ | |
db9f0278 JB |
1433 | unbind_to (c.pdlcount, Qnil); |
1434 | return val; | |
1435 | } | |
1436 | c.next = catchlist; | |
1437 | catchlist = &c; | |
177c0ea7 | 1438 | |
82da7701 JB |
1439 | h.var = var; |
1440 | h.handler = handlers; | |
db9f0278 | 1441 | h.next = handlerlist; |
db9f0278 JB |
1442 | h.tag = &c; |
1443 | handlerlist = &h; | |
1444 | ||
defb1411 | 1445 | val = eval_sub (bodyform); |
db9f0278 JB |
1446 | catchlist = c.next; |
1447 | handlerlist = h.next; | |
1448 | return val; | |
1449 | } | |
1450 | ||
f029ca5f RS |
1451 | /* Call the function BFUN with no arguments, catching errors within it |
1452 | according to HANDLERS. If there is an error, call HFUN with | |
1453 | one argument which is the data that describes the error: | |
1454 | (SIGNALNAME . DATA) | |
1455 | ||
1456 | HANDLERS can be a list of conditions to catch. | |
1457 | If HANDLERS is Qt, catch all errors. | |
1458 | If HANDLERS is Qerror, catch all errors | |
1459 | but allow the debugger to run if that is enabled. */ | |
1460 | ||
db9f0278 | 1461 | Lisp_Object |
d3da34e0 JB |
1462 | internal_condition_case (Lisp_Object (*bfun) (void), Lisp_Object handlers, |
1463 | Lisp_Object (*hfun) (Lisp_Object)) | |
db9f0278 JB |
1464 | { |
1465 | Lisp_Object val; | |
1466 | struct catchtag c; | |
1467 | struct handler h; | |
1468 | ||
1469 | c.tag = Qnil; | |
1470 | c.val = Qnil; | |
1471 | c.backlist = backtrace_list; | |
1472 | c.handlerlist = handlerlist; | |
1473 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1474 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1475 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1476 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1477 | c.gcpro = gcprolist; |
bcf28080 | 1478 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1479 | if (_setjmp (c.jmp)) |
1480 | { | |
9d58218c | 1481 | return (*hfun) (c.val); |
db9f0278 JB |
1482 | } |
1483 | c.next = catchlist; | |
1484 | catchlist = &c; | |
1485 | h.handler = handlers; | |
1486 | h.var = Qnil; | |
db9f0278 JB |
1487 | h.next = handlerlist; |
1488 | h.tag = &c; | |
1489 | handlerlist = &h; | |
1490 | ||
1491 | val = (*bfun) (); | |
1492 | catchlist = c.next; | |
1493 | handlerlist = h.next; | |
1494 | return val; | |
1495 | } | |
1496 | ||
2659a09f | 1497 | /* Like internal_condition_case but call BFUN with ARG as its argument. */ |
f029ca5f | 1498 | |
d227775c | 1499 | Lisp_Object |
d3da34e0 JB |
1500 | internal_condition_case_1 (Lisp_Object (*bfun) (Lisp_Object), Lisp_Object arg, |
1501 | Lisp_Object handlers, Lisp_Object (*hfun) (Lisp_Object)) | |
d227775c RS |
1502 | { |
1503 | Lisp_Object val; | |
1504 | struct catchtag c; | |
1505 | struct handler h; | |
1506 | ||
1507 | c.tag = Qnil; | |
1508 | c.val = Qnil; | |
1509 | c.backlist = backtrace_list; | |
1510 | c.handlerlist = handlerlist; | |
1511 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1512 | c.pdlcount = SPECPDL_INDEX (); |
d227775c | 1513 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1514 | c.interrupt_input_blocked = interrupt_input_blocked; |
d227775c | 1515 | c.gcpro = gcprolist; |
bcf28080 | 1516 | c.byte_stack = byte_stack_list; |
d227775c RS |
1517 | if (_setjmp (c.jmp)) |
1518 | { | |
9d58218c | 1519 | return (*hfun) (c.val); |
d227775c RS |
1520 | } |
1521 | c.next = catchlist; | |
1522 | catchlist = &c; | |
1523 | h.handler = handlers; | |
1524 | h.var = Qnil; | |
1525 | h.next = handlerlist; | |
1526 | h.tag = &c; | |
1527 | handlerlist = &h; | |
1528 | ||
1529 | val = (*bfun) (arg); | |
1530 | catchlist = c.next; | |
1531 | handlerlist = h.next; | |
1532 | return val; | |
1533 | } | |
10b29d41 | 1534 | |
53967e09 CY |
1535 | /* Like internal_condition_case_1 but call BFUN with ARG1 and ARG2 as |
1536 | its arguments. */ | |
1537 | ||
1538 | Lisp_Object | |
178f2507 SM |
1539 | internal_condition_case_2 (Lisp_Object (*bfun) (Lisp_Object, Lisp_Object), |
1540 | Lisp_Object arg1, | |
1541 | Lisp_Object arg2, | |
1542 | Lisp_Object handlers, | |
1543 | Lisp_Object (*hfun) (Lisp_Object)) | |
53967e09 CY |
1544 | { |
1545 | Lisp_Object val; | |
1546 | struct catchtag c; | |
1547 | struct handler h; | |
1548 | ||
53967e09 CY |
1549 | c.tag = Qnil; |
1550 | c.val = Qnil; | |
1551 | c.backlist = backtrace_list; | |
1552 | c.handlerlist = handlerlist; | |
1553 | c.lisp_eval_depth = lisp_eval_depth; | |
1554 | c.pdlcount = SPECPDL_INDEX (); | |
1555 | c.poll_suppress_count = poll_suppress_count; | |
1556 | c.interrupt_input_blocked = interrupt_input_blocked; | |
1557 | c.gcpro = gcprolist; | |
1558 | c.byte_stack = byte_stack_list; | |
1559 | if (_setjmp (c.jmp)) | |
1560 | { | |
1561 | return (*hfun) (c.val); | |
1562 | } | |
1563 | c.next = catchlist; | |
1564 | catchlist = &c; | |
1565 | h.handler = handlers; | |
1566 | h.var = Qnil; | |
1567 | h.next = handlerlist; | |
1568 | h.tag = &c; | |
1569 | handlerlist = &h; | |
1570 | ||
1571 | val = (*bfun) (arg1, arg2); | |
1572 | catchlist = c.next; | |
1573 | handlerlist = h.next; | |
1574 | return val; | |
1575 | } | |
10b29d41 | 1576 | |
2659a09f | 1577 | /* Like internal_condition_case but call BFUN with NARGS as first, |
10b29d41 GM |
1578 | and ARGS as second argument. */ |
1579 | ||
1580 | Lisp_Object | |
f66c7cf8 PE |
1581 | internal_condition_case_n (Lisp_Object (*bfun) (ptrdiff_t, Lisp_Object *), |
1582 | ptrdiff_t nargs, | |
178f2507 SM |
1583 | Lisp_Object *args, |
1584 | Lisp_Object handlers, | |
1585 | Lisp_Object (*hfun) (Lisp_Object)) | |
10b29d41 GM |
1586 | { |
1587 | Lisp_Object val; | |
1588 | struct catchtag c; | |
1589 | struct handler h; | |
1590 | ||
1591 | c.tag = Qnil; | |
1592 | c.val = Qnil; | |
1593 | c.backlist = backtrace_list; | |
1594 | c.handlerlist = handlerlist; | |
1595 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1596 | c.pdlcount = SPECPDL_INDEX (); |
10b29d41 | 1597 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1598 | c.interrupt_input_blocked = interrupt_input_blocked; |
10b29d41 GM |
1599 | c.gcpro = gcprolist; |
1600 | c.byte_stack = byte_stack_list; | |
1601 | if (_setjmp (c.jmp)) | |
1602 | { | |
1603 | return (*hfun) (c.val); | |
1604 | } | |
1605 | c.next = catchlist; | |
1606 | catchlist = &c; | |
1607 | h.handler = handlers; | |
1608 | h.var = Qnil; | |
1609 | h.next = handlerlist; | |
1610 | h.tag = &c; | |
1611 | handlerlist = &h; | |
1612 | ||
1613 | val = (*bfun) (nargs, args); | |
1614 | catchlist = c.next; | |
1615 | handlerlist = h.next; | |
1616 | return val; | |
1617 | } | |
1618 | ||
d227775c | 1619 | \f |
7d47b580 | 1620 | static Lisp_Object find_handler_clause (Lisp_Object, Lisp_Object); |
e7f7fbaa SM |
1621 | static int maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig, |
1622 | Lisp_Object data); | |
db9f0278 | 1623 | |
a7ca3326 | 1624 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, |
9dbc9081 PJ |
1625 | doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA. |
1626 | This function does not return. | |
1627 | ||
1628 | An error symbol is a symbol with an `error-conditions' property | |
1629 | that is a list of condition names. | |
1630 | A handler for any of those names will get to handle this signal. | |
1631 | The symbol `error' should normally be one of them. | |
1632 | ||
1633 | DATA should be a list. Its elements are printed as part of the error message. | |
3297ec22 LT |
1634 | See Info anchor `(elisp)Definition of signal' for some details on how this |
1635 | error message is constructed. | |
9dbc9081 PJ |
1636 | If the signal is handled, DATA is made available to the handler. |
1637 | See also the function `condition-case'. */) | |
5842a27b | 1638 | (Lisp_Object error_symbol, Lisp_Object data) |
db9f0278 | 1639 | { |
bfa8ca43 | 1640 | /* When memory is full, ERROR-SYMBOL is nil, |
26631f2b RS |
1641 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). |
1642 | That is a special case--don't do this in other situations. */ | |
db9f0278 | 1643 | Lisp_Object conditions; |
c11d3d17 | 1644 | Lisp_Object string; |
e7f7fbaa SM |
1645 | Lisp_Object real_error_symbol |
1646 | = (NILP (error_symbol) ? Fcar (data) : error_symbol); | |
1647 | register Lisp_Object clause = Qnil; | |
1648 | struct handler *h; | |
a2ff3819 | 1649 | struct backtrace *bp; |
db9f0278 | 1650 | |
346598f1 | 1651 | immediate_quit = handling_signal = 0; |
d063129f | 1652 | abort_on_gc = 0; |
db9f0278 JB |
1653 | if (gc_in_progress || waiting_for_input) |
1654 | abort (); | |
1655 | ||
26631f2b RS |
1656 | #if 0 /* rms: I don't know why this was here, |
1657 | but it is surely wrong for an error that is handled. */ | |
d148e14d | 1658 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
1659 | if (display_hourglass_p) |
1660 | cancel_hourglass (); | |
48f8dfa3 | 1661 | #endif |
177c0ea7 | 1662 | #endif |
48f8dfa3 | 1663 | |
61ede770 | 1664 | /* This hook is used by edebug. */ |
26631f2b RS |
1665 | if (! NILP (Vsignal_hook_function) |
1666 | && ! NILP (error_symbol)) | |
9f5903bb RS |
1667 | { |
1668 | /* Edebug takes care of restoring these variables when it exits. */ | |
1669 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1670 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1671 | ||
1672 | if (SPECPDL_INDEX () + 40 > max_specpdl_size) | |
1673 | max_specpdl_size = SPECPDL_INDEX () + 40; | |
1674 | ||
1675 | call2 (Vsignal_hook_function, error_symbol, data); | |
1676 | } | |
61ede770 | 1677 | |
1ea9dec4 | 1678 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1679 | |
a2ff3819 GM |
1680 | /* Remember from where signal was called. Skip over the frame for |
1681 | `signal' itself. If a frame for `error' follows, skip that, | |
26631f2b RS |
1682 | too. Don't do this when ERROR_SYMBOL is nil, because that |
1683 | is a memory-full error. */ | |
090a072f | 1684 | Vsignaling_function = Qnil; |
26631f2b | 1685 | if (backtrace_list && !NILP (error_symbol)) |
090a072f GM |
1686 | { |
1687 | bp = backtrace_list->next; | |
1688 | if (bp && bp->function && EQ (*bp->function, Qerror)) | |
1689 | bp = bp->next; | |
1690 | if (bp && bp->function) | |
1691 | Vsignaling_function = *bp->function; | |
1692 | } | |
a2ff3819 | 1693 | |
e7f7fbaa | 1694 | for (h = handlerlist; h; h = h->next) |
db9f0278 | 1695 | { |
7d47b580 | 1696 | clause = find_handler_clause (h->handler, conditions); |
265a9e55 | 1697 | if (!NILP (clause)) |
e7f7fbaa | 1698 | break; |
db9f0278 | 1699 | } |
475545b5 | 1700 | |
e7f7fbaa SM |
1701 | if (/* Don't run the debugger for a memory-full error. |
1702 | (There is no room in memory to do that!) */ | |
1703 | !NILP (error_symbol) | |
1704 | && (!NILP (Vdebug_on_signal) | |
1705 | /* If no handler is present now, try to run the debugger. */ | |
1706 | || NILP (clause) | |
bd1ba3e8 CY |
1707 | /* A `debug' symbol in the handler list disables the normal |
1708 | suppression of the debugger. */ | |
1709 | || (CONSP (clause) && CONSP (XCAR (clause)) | |
1710 | && !NILP (Fmemq (Qdebug, XCAR (clause)))) | |
e7f7fbaa SM |
1711 | /* Special handler that means "print a message and run debugger |
1712 | if requested". */ | |
1713 | || EQ (h->handler, Qerror))) | |
1714 | { | |
1715 | int debugger_called | |
1716 | = maybe_call_debugger (conditions, error_symbol, data); | |
1717 | /* We can't return values to code which signaled an error, but we | |
1718 | can continue code which has signaled a quit. */ | |
1719 | if (debugger_called && EQ (real_error_symbol, Qquit)) | |
1720 | return Qnil; | |
475545b5 | 1721 | } |
db9f0278 | 1722 | |
e7f7fbaa SM |
1723 | if (!NILP (clause)) |
1724 | { | |
1725 | Lisp_Object unwind_data | |
1726 | = (NILP (error_symbol) ? data : Fcons (error_symbol, data)); | |
475545b5 | 1727 | |
e7f7fbaa SM |
1728 | h->chosen_clause = clause; |
1729 | unwind_to_catch (h->tag, unwind_data); | |
1730 | } | |
1731 | else | |
1732 | { | |
1733 | if (catchlist != 0) | |
1734 | Fthrow (Qtop_level, Qt); | |
1735 | } | |
c11d3d17 | 1736 | |
1ea9dec4 | 1737 | if (! NILP (error_symbol)) |
c11d3d17 | 1738 | data = Fcons (error_symbol, data); |
475545b5 | 1739 | |
c11d3d17 | 1740 | string = Ferror_message_string (data); |
583f48b9 | 1741 | fatal ("%s", SDATA (string)); |
db9f0278 JB |
1742 | } |
1743 | ||
734d55a2 KS |
1744 | /* Internal version of Fsignal that never returns. |
1745 | Used for anything but Qquit (which can return from Fsignal). */ | |
1746 | ||
1747 | void | |
d3da34e0 | 1748 | xsignal (Lisp_Object error_symbol, Lisp_Object data) |
734d55a2 KS |
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 | |
d3da34e0 | 1757 | xsignal0 (Lisp_Object error_symbol) |
734d55a2 KS |
1758 | { |
1759 | xsignal (error_symbol, Qnil); | |
1760 | } | |
1761 | ||
1762 | void | |
d3da34e0 | 1763 | xsignal1 (Lisp_Object error_symbol, Lisp_Object arg) |
734d55a2 KS |
1764 | { |
1765 | xsignal (error_symbol, list1 (arg)); | |
1766 | } | |
1767 | ||
1768 | void | |
d3da34e0 | 1769 | xsignal2 (Lisp_Object error_symbol, Lisp_Object arg1, Lisp_Object arg2) |
734d55a2 KS |
1770 | { |
1771 | xsignal (error_symbol, list2 (arg1, arg2)); | |
1772 | } | |
1773 | ||
1774 | void | |
d3da34e0 | 1775 | xsignal3 (Lisp_Object error_symbol, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
734d55a2 KS |
1776 | { |
1777 | xsignal (error_symbol, list3 (arg1, arg2, arg3)); | |
1778 | } | |
1779 | ||
1780 | /* Signal `error' with message S, and additional arg ARG. | |
1781 | If ARG is not a genuine list, make it a one-element list. */ | |
1782 | ||
1783 | void | |
a8fe7202 | 1784 | signal_error (const char *s, Lisp_Object arg) |
734d55a2 KS |
1785 | { |
1786 | Lisp_Object tortoise, hare; | |
1787 | ||
1788 | hare = tortoise = arg; | |
1789 | while (CONSP (hare)) | |
1790 | { | |
1791 | hare = XCDR (hare); | |
1792 | if (!CONSP (hare)) | |
1793 | break; | |
1794 | ||
1795 | hare = XCDR (hare); | |
1796 | tortoise = XCDR (tortoise); | |
1797 | ||
1798 | if (EQ (hare, tortoise)) | |
1799 | break; | |
1800 | } | |
1801 | ||
1802 | if (!NILP (hare)) | |
1803 | arg = Fcons (arg, Qnil); /* Make it a list. */ | |
1804 | ||
1805 | xsignal (Qerror, Fcons (build_string (s), arg)); | |
1806 | } | |
1807 | ||
1808 | ||
e0f24100 | 1809 | /* Return nonzero if LIST is a non-nil atom or |
128c0f66 RM |
1810 | a list containing one of CONDITIONS. */ |
1811 | ||
1812 | static int | |
d3da34e0 | 1813 | wants_debugger (Lisp_Object list, Lisp_Object conditions) |
128c0f66 | 1814 | { |
4de86b16 | 1815 | if (NILP (list)) |
128c0f66 RM |
1816 | return 0; |
1817 | if (! CONSP (list)) | |
1818 | return 1; | |
1819 | ||
ab67260b | 1820 | while (CONSP (conditions)) |
128c0f66 | 1821 | { |
ab67260b | 1822 | Lisp_Object this, tail; |
03699b14 KR |
1823 | this = XCAR (conditions); |
1824 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1825 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1826 | return 1; |
03699b14 | 1827 | conditions = XCDR (conditions); |
128c0f66 | 1828 | } |
ab67260b | 1829 | return 0; |
128c0f66 RM |
1830 | } |
1831 | ||
fc950e09 KH |
1832 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1833 | and described by SIGNAL-DATA, should skip the debugger | |
1b1acc13 | 1834 | according to debugger-ignored-errors. */ |
fc950e09 KH |
1835 | |
1836 | static int | |
d3da34e0 | 1837 | skip_debugger (Lisp_Object conditions, Lisp_Object data) |
fc950e09 KH |
1838 | { |
1839 | Lisp_Object tail; | |
1840 | int first_string = 1; | |
1841 | Lisp_Object error_message; | |
1842 | ||
17401c97 GM |
1843 | error_message = Qnil; |
1844 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1845 | { |
03699b14 | 1846 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1847 | { |
1848 | if (first_string) | |
1849 | { | |
1850 | error_message = Ferror_message_string (data); | |
1851 | first_string = 0; | |
1852 | } | |
177c0ea7 | 1853 | |
03699b14 | 1854 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1855 | return 1; |
1856 | } | |
1857 | else | |
1858 | { | |
1859 | Lisp_Object contail; | |
1860 | ||
17401c97 | 1861 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1862 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1863 | return 1; |
1864 | } | |
1865 | } | |
1866 | ||
1867 | return 0; | |
1868 | } | |
1869 | ||
ddaa36e1 | 1870 | /* Call the debugger if calling it is currently enabled for CONDITIONS. |
7d47b580 JB |
1871 | SIG and DATA describe the signal. There are two ways to pass them: |
1872 | = SIG is the error symbol, and DATA is the rest of the data. | |
1873 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). | |
1874 | This is for memory-full errors only. */ | |
ddaa36e1 | 1875 | static int |
d3da34e0 | 1876 | maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig, Lisp_Object data) |
ddaa36e1 AS |
1877 | { |
1878 | Lisp_Object combined_data; | |
1879 | ||
1880 | combined_data = Fcons (sig, data); | |
1881 | ||
1882 | if ( | |
1883 | /* Don't try to run the debugger with interrupts blocked. | |
1884 | The editing loop would return anyway. */ | |
1885 | ! INPUT_BLOCKED_P | |
1886 | /* Does user want to enter debugger for this kind of error? */ | |
1887 | && (EQ (sig, Qquit) | |
1888 | ? debug_on_quit | |
1889 | : wants_debugger (Vdebug_on_error, conditions)) | |
1890 | && ! skip_debugger (conditions, combined_data) | |
f6d62986 | 1891 | /* RMS: What's this for? */ |
ddaa36e1 AS |
1892 | && when_entered_debugger < num_nonmacro_input_events) |
1893 | { | |
1894 | call_debugger (Fcons (Qerror, Fcons (combined_data, Qnil))); | |
1895 | return 1; | |
1896 | } | |
1897 | ||
1898 | return 0; | |
1899 | } | |
1900 | ||
db9f0278 | 1901 | static Lisp_Object |
7d47b580 | 1902 | find_handler_clause (Lisp_Object handlers, Lisp_Object conditions) |
db9f0278 JB |
1903 | { |
1904 | register Lisp_Object h; | |
db9f0278 | 1905 | |
f01cbfdd RS |
1906 | /* t is used by handlers for all conditions, set up by C code. */ |
1907 | if (EQ (handlers, Qt)) | |
db9f0278 | 1908 | return Qt; |
f01cbfdd | 1909 | |
61ede770 RS |
1910 | /* error is used similarly, but means print an error message |
1911 | and run the debugger if that is enabled. */ | |
e7f7fbaa SM |
1912 | if (EQ (handlers, Qerror)) |
1913 | return Qt; | |
f01cbfdd | 1914 | |
e7f7fbaa | 1915 | for (h = handlers; CONSP (h); h = XCDR (h)) |
db9f0278 | 1916 | { |
e7f7fbaa SM |
1917 | Lisp_Object handler = XCAR (h); |
1918 | Lisp_Object condit, tem; | |
5f96776a | 1919 | |
5f96776a | 1920 | if (!CONSP (handler)) |
db9f0278 | 1921 | continue; |
e7f7fbaa | 1922 | condit = XCAR (handler); |
5f96776a RS |
1923 | /* Handle a single condition name in handler HANDLER. */ |
1924 | if (SYMBOLP (condit)) | |
1925 | { | |
1926 | tem = Fmemq (Fcar (handler), conditions); | |
1927 | if (!NILP (tem)) | |
1928 | return handler; | |
1929 | } | |
1930 | /* Handle a list of condition names in handler HANDLER. */ | |
1931 | else if (CONSP (condit)) | |
1932 | { | |
f01cbfdd RS |
1933 | Lisp_Object tail; |
1934 | for (tail = condit; CONSP (tail); tail = XCDR (tail)) | |
5f96776a | 1935 | { |
e7f7fbaa | 1936 | tem = Fmemq (XCAR (tail), conditions); |
5f96776a | 1937 | if (!NILP (tem)) |
e7f7fbaa | 1938 | return handler; |
5f96776a RS |
1939 | } |
1940 | } | |
db9f0278 | 1941 | } |
f01cbfdd | 1942 | |
db9f0278 JB |
1943 | return Qnil; |
1944 | } | |
1945 | ||
db9f0278 | 1946 | |
f6d62986 | 1947 | /* Dump an error message; called like vprintf. */ |
db9f0278 | 1948 | void |
b3ffc17c | 1949 | verror (const char *m, va_list ap) |
db9f0278 | 1950 | { |
70476b54 | 1951 | char buf[4000]; |
c2d1e36d PE |
1952 | ptrdiff_t size = sizeof buf; |
1953 | ptrdiff_t size_max = STRING_BYTES_BOUND + 1; | |
9125da08 | 1954 | char *buffer = buf; |
c2d1e36d | 1955 | ptrdiff_t used; |
9125da08 RS |
1956 | Lisp_Object string; |
1957 | ||
d749b01b | 1958 | used = evxprintf (&buffer, &size, buf, size_max, m, ap); |
5fdb398c | 1959 | string = make_string (buffer, used); |
eb3f1cc8 | 1960 | if (buffer != buf) |
9ae6734f | 1961 | xfree (buffer); |
9125da08 | 1962 | |
734d55a2 | 1963 | xsignal1 (Qerror, string); |
db9f0278 | 1964 | } |
b3ffc17c DN |
1965 | |
1966 | ||
f6d62986 | 1967 | /* Dump an error message; called like printf. */ |
b3ffc17c DN |
1968 | |
1969 | /* VARARGS 1 */ | |
1970 | void | |
1971 | error (const char *m, ...) | |
1972 | { | |
1973 | va_list ap; | |
1974 | va_start (ap, m); | |
1975 | verror (m, ap); | |
1976 | va_end (ap); | |
1977 | } | |
db9f0278 | 1978 | \f |
a7ca3326 | 1979 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 2, 0, |
9dbc9081 PJ |
1980 | doc: /* Non-nil if FUNCTION makes provisions for interactive calling. |
1981 | This means it contains a description for how to read arguments to give it. | |
1982 | The value is nil for an invalid function or a symbol with no function | |
1983 | definition. | |
1984 | ||
1985 | Interactively callable functions include strings and vectors (treated | |
1986 | as keyboard macros), lambda-expressions that contain a top-level call | |
1987 | to `interactive', autoload definitions made by `autoload' with non-nil | |
1988 | fourth argument, and some of the built-in functions of Lisp. | |
1989 | ||
e72706be RS |
1990 | Also, a symbol satisfies `commandp' if its function definition does so. |
1991 | ||
1992 | If the optional argument FOR-CALL-INTERACTIVELY is non-nil, | |
769b4fb2 | 1993 | then strings and vectors are not accepted. */) |
5842a27b | 1994 | (Lisp_Object function, Lisp_Object for_call_interactively) |
db9f0278 JB |
1995 | { |
1996 | register Lisp_Object fun; | |
1997 | register Lisp_Object funcar; | |
52b71f49 | 1998 | Lisp_Object if_prop = Qnil; |
db9f0278 JB |
1999 | |
2000 | fun = function; | |
2001 | ||
52b71f49 SM |
2002 | fun = indirect_function (fun); /* Check cycles. */ |
2003 | if (NILP (fun) || EQ (fun, Qunbound)) | |
ffd56f97 | 2004 | return Qnil; |
db9f0278 | 2005 | |
52b71f49 SM |
2006 | /* Check an `interactive-form' property if present, analogous to the |
2007 | function-documentation property. */ | |
2008 | fun = function; | |
2009 | while (SYMBOLP (fun)) | |
2010 | { | |
2b9aa051 | 2011 | Lisp_Object tmp = Fget (fun, Qinteractive_form); |
52b71f49 SM |
2012 | if (!NILP (tmp)) |
2013 | if_prop = Qt; | |
2014 | fun = Fsymbol_function (fun); | |
2015 | } | |
2016 | ||
db9f0278 JB |
2017 | /* Emacs primitives are interactive if their DEFUN specifies an |
2018 | interactive spec. */ | |
90165123 | 2019 | if (SUBRP (fun)) |
04724b69 | 2020 | return XSUBR (fun)->intspec ? Qt : if_prop; |
db9f0278 JB |
2021 | |
2022 | /* Bytecode objects are interactive if they are long enough to | |
2023 | have an element whose index is COMPILED_INTERACTIVE, which is | |
2024 | where the interactive spec is stored. */ | |
90165123 | 2025 | else if (COMPILEDP (fun)) |
845975f5 | 2026 | return ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
52b71f49 | 2027 | ? Qt : if_prop); |
db9f0278 JB |
2028 | |
2029 | /* Strings and vectors are keyboard macros. */ | |
52b71f49 | 2030 | if (STRINGP (fun) || VECTORP (fun)) |
6e33efc4 | 2031 | return (NILP (for_call_interactively) ? Qt : Qnil); |
db9f0278 JB |
2032 | |
2033 | /* Lists may represent commands. */ | |
2034 | if (!CONSP (fun)) | |
2035 | return Qnil; | |
ed16fb98 | 2036 | funcar = XCAR (fun); |
b38b1ec0 | 2037 | if (EQ (funcar, Qclosure)) |
7200d79c SM |
2038 | return (!NILP (Fassq (Qinteractive, Fcdr (Fcdr (XCDR (fun))))) |
2039 | ? Qt : if_prop); | |
23aba0ea | 2040 | else if (EQ (funcar, Qlambda)) |
52b71f49 | 2041 | return !NILP (Fassq (Qinteractive, Fcdr (XCDR (fun)))) ? Qt : if_prop; |
b38b1ec0 | 2042 | else if (EQ (funcar, Qautoload)) |
52b71f49 | 2043 | return !NILP (Fcar (Fcdr (Fcdr (XCDR (fun))))) ? Qt : if_prop; |
db9f0278 JB |
2044 | else |
2045 | return Qnil; | |
2046 | } | |
2047 | ||
db9f0278 | 2048 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, |
9dbc9081 PJ |
2049 | doc: /* Define FUNCTION to autoload from FILE. |
2050 | FUNCTION is a symbol; FILE is a file name string to pass to `load'. | |
2051 | Third arg DOCSTRING is documentation for the function. | |
2052 | Fourth arg INTERACTIVE if non-nil says function can be called interactively. | |
2053 | Fifth arg TYPE indicates the type of the object: | |
2054 | nil or omitted says FUNCTION is a function, | |
2055 | `keymap' says FUNCTION is really a keymap, and | |
2056 | `macro' or t says FUNCTION is really a macro. | |
2057 | Third through fifth args give info about the real definition. | |
2058 | They default to nil. | |
2059 | If FUNCTION is already defined other than as an autoload, | |
2060 | this does nothing and returns nil. */) | |
5842a27b | 2061 | (Lisp_Object function, Lisp_Object file, Lisp_Object docstring, Lisp_Object interactive, Lisp_Object type) |
db9f0278 | 2062 | { |
b7826503 PJ |
2063 | CHECK_SYMBOL (function); |
2064 | CHECK_STRING (file); | |
db9f0278 | 2065 | |
f6d62986 | 2066 | /* If function is defined and not as an autoload, don't override. */ |
db9f0278 | 2067 | if (!EQ (XSYMBOL (function)->function, Qunbound) |
90165123 | 2068 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 2069 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
2070 | return Qnil; |
2071 | ||
7973e637 SM |
2072 | if (NILP (Vpurify_flag)) |
2073 | /* Only add entries after dumping, because the ones before are | |
2074 | not useful and else we get loads of them from the loaddefs.el. */ | |
2075 | LOADHIST_ATTACH (Fcons (Qautoload, function)); | |
905a9ed3 | 2076 | else |
a56eaaef | 2077 | /* We don't want the docstring in purespace (instead, |
d6d23852 SM |
2078 | Snarf-documentation should (hopefully) overwrite it). |
2079 | We used to use 0 here, but that leads to accidental sharing in | |
2080 | purecopy's hash-consing, so we use a (hopefully) unique integer | |
2081 | instead. */ | |
51639eac | 2082 | docstring = make_number (XPNTR (function)); |
a56eaaef DN |
2083 | return Ffset (function, |
2084 | Fpurecopy (list5 (Qautoload, file, docstring, | |
2085 | interactive, type))); | |
db9f0278 JB |
2086 | } |
2087 | ||
2088 | Lisp_Object | |
d3da34e0 | 2089 | un_autoload (Lisp_Object oldqueue) |
db9f0278 JB |
2090 | { |
2091 | register Lisp_Object queue, first, second; | |
2092 | ||
2093 | /* Queue to unwind is current value of Vautoload_queue. | |
2094 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
2095 | queue = Vautoload_queue; | |
2096 | Vautoload_queue = oldqueue; | |
2097 | while (CONSP (queue)) | |
2098 | { | |
e509f168 | 2099 | first = XCAR (queue); |
db9f0278 JB |
2100 | second = Fcdr (first); |
2101 | first = Fcar (first); | |
47b82df9 RS |
2102 | if (EQ (first, make_number (0))) |
2103 | Vfeatures = second; | |
db9f0278 JB |
2104 | else |
2105 | Ffset (first, second); | |
e509f168 | 2106 | queue = XCDR (queue); |
db9f0278 JB |
2107 | } |
2108 | return Qnil; | |
2109 | } | |
2110 | ||
ca20916b RS |
2111 | /* Load an autoloaded function. |
2112 | FUNNAME is the symbol which is the function's name. | |
2113 | FUNDEF is the autoload definition (a list). */ | |
2114 | ||
045ba794 | 2115 | void |
d3da34e0 | 2116 | do_autoload (Lisp_Object fundef, Lisp_Object funname) |
db9f0278 | 2117 | { |
aed13378 | 2118 | int count = SPECPDL_INDEX (); |
d945992e | 2119 | Lisp_Object fun; |
ca20916b | 2120 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 | 2121 | |
aea6173f RS |
2122 | /* This is to make sure that loadup.el gives a clear picture |
2123 | of what files are preloaded and when. */ | |
ab4db096 RS |
2124 | if (! NILP (Vpurify_flag)) |
2125 | error ("Attempt to autoload %s while preparing to dump", | |
d5db4077 | 2126 | SDATA (SYMBOL_NAME (funname))); |
ab4db096 | 2127 | |
db9f0278 | 2128 | fun = funname; |
b7826503 | 2129 | CHECK_SYMBOL (funname); |
ca20916b | 2130 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 2131 | |
f87740dc | 2132 | /* Preserve the match data. */ |
89f2614d | 2133 | record_unwind_save_match_data (); |
177c0ea7 | 2134 | |
a04ee161 RS |
2135 | /* If autoloading gets an error (which includes the error of failing |
2136 | to define the function being called), we use Vautoload_queue | |
2137 | to undo function definitions and `provide' calls made by | |
2138 | the function. We do this in the specific case of autoloading | |
2139 | because autoloading is not an explicit request "load this file", | |
2140 | but rather a request to "call this function". | |
d3da34e0 | 2141 | |
a04ee161 | 2142 | The value saved here is to be restored into Vautoload_queue. */ |
db9f0278 JB |
2143 | record_unwind_protect (un_autoload, Vautoload_queue); |
2144 | Vautoload_queue = Qt; | |
7351b242 | 2145 | Fload (Fcar (Fcdr (fundef)), Qnil, Qt, Qnil, Qt); |
2a49b6e5 | 2146 | |
db9f0278 JB |
2147 | /* Once loading finishes, don't undo it. */ |
2148 | Vautoload_queue = Qt; | |
2149 | unbind_to (count, Qnil); | |
2150 | ||
a7f96a35 | 2151 | fun = Findirect_function (fun, Qnil); |
ffd56f97 | 2152 | |
76c2b0cc | 2153 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 | 2154 | error ("Autoloading failed to define function %s", |
d5db4077 | 2155 | SDATA (SYMBOL_NAME (funname))); |
ca20916b | 2156 | UNGCPRO; |
db9f0278 | 2157 | } |
4c576a83 | 2158 | |
db9f0278 | 2159 | \f |
a7ca3326 | 2160 | DEFUN ("eval", Feval, Seval, 1, 2, 0, |
a0ee6f27 SM |
2161 | doc: /* Evaluate FORM and return its value. |
2162 | If LEXICAL is t, evaluate using lexical scoping. */) | |
2163 | (Lisp_Object form, Lisp_Object lexical) | |
defb1411 SM |
2164 | { |
2165 | int count = SPECPDL_INDEX (); | |
a0ee6f27 SM |
2166 | specbind (Qinternal_interpreter_environment, |
2167 | NILP (lexical) ? Qnil : Fcons (Qt, Qnil)); | |
defb1411 SM |
2168 | return unbind_to (count, eval_sub (form)); |
2169 | } | |
2170 | ||
2171 | /* Eval a sub-expression of the current expression (i.e. in the same | |
2172 | lexical scope). */ | |
2173 | Lisp_Object | |
2174 | eval_sub (Lisp_Object form) | |
db9f0278 JB |
2175 | { |
2176 | Lisp_Object fun, val, original_fun, original_args; | |
2177 | Lisp_Object funcar; | |
2178 | struct backtrace backtrace; | |
2179 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2180 | ||
df470e3b | 2181 | if (handling_signal) |
48f8dfa3 | 2182 | abort (); |
177c0ea7 | 2183 | |
90165123 | 2184 | if (SYMBOLP (form)) |
b9598260 | 2185 | { |
f07a954e SM |
2186 | /* Look up its binding in the lexical environment. |
2187 | We do not pay attention to the declared_special flag here, since we | |
2188 | already did that when let-binding the variable. */ | |
2189 | Lisp_Object lex_binding | |
2190 | = !NILP (Vinternal_interpreter_environment) /* Mere optimization! */ | |
2191 | ? Fassq (form, Vinternal_interpreter_environment) | |
2192 | : Qnil; | |
2193 | if (CONSP (lex_binding)) | |
2194 | return XCDR (lex_binding); | |
2195 | else | |
2196 | return Fsymbol_value (form); | |
b9598260 SM |
2197 | } |
2198 | ||
db9f0278 JB |
2199 | if (!CONSP (form)) |
2200 | return form; | |
2201 | ||
2202 | QUIT; | |
ee830945 RS |
2203 | if ((consing_since_gc > gc_cons_threshold |
2204 | && consing_since_gc > gc_relative_threshold) | |
2205 | || | |
2206 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
db9f0278 JB |
2207 | { |
2208 | GCPRO1 (form); | |
2209 | Fgarbage_collect (); | |
2210 | UNGCPRO; | |
2211 | } | |
2212 | ||
2213 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2214 | { | |
2215 | if (max_lisp_eval_depth < 100) | |
2216 | max_lisp_eval_depth = 100; | |
2217 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2218 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2219 | } |
2220 | ||
2221 | original_fun = Fcar (form); | |
2222 | original_args = Fcdr (form); | |
2223 | ||
2224 | backtrace.next = backtrace_list; | |
2225 | backtrace_list = &backtrace; | |
f6d62986 | 2226 | backtrace.function = &original_fun; /* This also protects them from gc. */ |
db9f0278 JB |
2227 | backtrace.args = &original_args; |
2228 | backtrace.nargs = UNEVALLED; | |
db9f0278 JB |
2229 | backtrace.debug_on_exit = 0; |
2230 | ||
2231 | if (debug_on_next_call) | |
2232 | do_debug_on_call (Qt); | |
2233 | ||
2234 | /* At this point, only original_fun and original_args | |
f6d62986 | 2235 | have values that will be used below. */ |
db9f0278 | 2236 | retry: |
8788120f KS |
2237 | |
2238 | /* Optimize for no indirection. */ | |
2239 | fun = original_fun; | |
2240 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2241 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2242 | fun = indirect_function (fun); | |
db9f0278 | 2243 | |
90165123 | 2244 | if (SUBRP (fun)) |
db9f0278 JB |
2245 | { |
2246 | Lisp_Object numargs; | |
166c822d | 2247 | Lisp_Object argvals[8]; |
db9f0278 JB |
2248 | Lisp_Object args_left; |
2249 | register int i, maxargs; | |
2250 | ||
2251 | args_left = original_args; | |
2252 | numargs = Flength (args_left); | |
2253 | ||
c1788fbc RS |
2254 | CHECK_CONS_LIST (); |
2255 | ||
f6d62986 SM |
2256 | if (XINT (numargs) < XSUBR (fun)->min_args |
2257 | || (XSUBR (fun)->max_args >= 0 | |
2258 | && XSUBR (fun)->max_args < XINT (numargs))) | |
734d55a2 | 2259 | xsignal2 (Qwrong_number_of_arguments, original_fun, numargs); |
db9f0278 | 2260 | |
ef1b0ba7 | 2261 | else if (XSUBR (fun)->max_args == UNEVALLED) |
bbc6b304 | 2262 | val = (XSUBR (fun)->function.aUNEVALLED) (args_left); |
ef1b0ba7 | 2263 | else if (XSUBR (fun)->max_args == MANY) |
db9f0278 | 2264 | { |
f6d62986 | 2265 | /* Pass a vector of evaluated arguments. */ |
db9f0278 | 2266 | Lisp_Object *vals; |
f66c7cf8 | 2267 | ptrdiff_t argnum = 0; |
3a7a9129 | 2268 | USE_SAFE_ALLOCA; |
db9f0278 | 2269 | |
b72e0717 | 2270 | SAFE_ALLOCA_LISP (vals, XINT (numargs)); |
db9f0278 JB |
2271 | |
2272 | GCPRO3 (args_left, fun, fun); | |
2273 | gcpro3.var = vals; | |
2274 | gcpro3.nvars = 0; | |
2275 | ||
265a9e55 | 2276 | while (!NILP (args_left)) |
db9f0278 | 2277 | { |
defb1411 | 2278 | vals[argnum++] = eval_sub (Fcar (args_left)); |
db9f0278 JB |
2279 | args_left = Fcdr (args_left); |
2280 | gcpro3.nvars = argnum; | |
2281 | } | |
db9f0278 JB |
2282 | |
2283 | backtrace.args = vals; | |
2284 | backtrace.nargs = XINT (numargs); | |
2285 | ||
d5273788 | 2286 | val = (XSUBR (fun)->function.aMANY) (XINT (numargs), vals); |
a6e3fa71 | 2287 | UNGCPRO; |
3a7a9129 | 2288 | SAFE_FREE (); |
db9f0278 | 2289 | } |
ef1b0ba7 | 2290 | else |
db9f0278 | 2291 | { |
ef1b0ba7 SM |
2292 | GCPRO3 (args_left, fun, fun); |
2293 | gcpro3.var = argvals; | |
2294 | gcpro3.nvars = 0; | |
db9f0278 | 2295 | |
ef1b0ba7 SM |
2296 | maxargs = XSUBR (fun)->max_args; |
2297 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
2298 | { | |
a0ee6f27 | 2299 | argvals[i] = eval_sub (Fcar (args_left)); |
ef1b0ba7 SM |
2300 | gcpro3.nvars = ++i; |
2301 | } | |
db9f0278 | 2302 | |
ef1b0ba7 | 2303 | UNGCPRO; |
db9f0278 | 2304 | |
ef1b0ba7 SM |
2305 | backtrace.args = argvals; |
2306 | backtrace.nargs = XINT (numargs); | |
2307 | ||
2308 | switch (i) | |
2309 | { | |
2310 | case 0: | |
2311 | val = (XSUBR (fun)->function.a0 ()); | |
2312 | break; | |
2313 | case 1: | |
2314 | val = (XSUBR (fun)->function.a1 (argvals[0])); | |
2315 | break; | |
2316 | case 2: | |
2317 | val = (XSUBR (fun)->function.a2 (argvals[0], argvals[1])); | |
2318 | break; | |
2319 | case 3: | |
2320 | val = (XSUBR (fun)->function.a3 | |
2321 | (argvals[0], argvals[1], argvals[2])); | |
2322 | break; | |
2323 | case 4: | |
2324 | val = (XSUBR (fun)->function.a4 | |
2325 | (argvals[0], argvals[1], argvals[2], argvals[3])); | |
2326 | break; | |
2327 | case 5: | |
2328 | val = (XSUBR (fun)->function.a5 | |
2329 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2330 | argvals[4])); | |
2331 | break; | |
2332 | case 6: | |
2333 | val = (XSUBR (fun)->function.a6 | |
2334 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2335 | argvals[4], argvals[5])); | |
2336 | break; | |
2337 | case 7: | |
2338 | val = (XSUBR (fun)->function.a7 | |
2339 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2340 | argvals[4], argvals[5], argvals[6])); | |
2341 | break; | |
2342 | ||
2343 | case 8: | |
2344 | val = (XSUBR (fun)->function.a8 | |
2345 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2346 | argvals[4], argvals[5], argvals[6], argvals[7])); | |
2347 | break; | |
2348 | ||
2349 | default: | |
2350 | /* Someone has created a subr that takes more arguments than | |
2351 | is supported by this code. We need to either rewrite the | |
2352 | subr to use a different argument protocol, or add more | |
2353 | cases to this switch. */ | |
2354 | abort (); | |
2355 | } | |
db9f0278 JB |
2356 | } |
2357 | } | |
ef1b0ba7 | 2358 | else if (COMPILEDP (fun)) |
defb1411 | 2359 | val = apply_lambda (fun, original_args); |
db9f0278 JB |
2360 | else |
2361 | { | |
8788120f | 2362 | if (EQ (fun, Qunbound)) |
734d55a2 | 2363 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 2364 | if (!CONSP (fun)) |
734d55a2 KS |
2365 | xsignal1 (Qinvalid_function, original_fun); |
2366 | funcar = XCAR (fun); | |
90165123 | 2367 | if (!SYMBOLP (funcar)) |
734d55a2 | 2368 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2369 | if (EQ (funcar, Qautoload)) |
2370 | { | |
2371 | do_autoload (fun, original_fun); | |
2372 | goto retry; | |
2373 | } | |
2374 | if (EQ (funcar, Qmacro)) | |
defb1411 SM |
2375 | val = eval_sub (apply1 (Fcdr (fun), original_args)); |
2376 | else if (EQ (funcar, Qlambda) | |
2377 | || EQ (funcar, Qclosure)) | |
2378 | val = apply_lambda (fun, original_args); | |
db9f0278 | 2379 | else |
734d55a2 | 2380 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 | 2381 | } |
c1788fbc RS |
2382 | CHECK_CONS_LIST (); |
2383 | ||
db9f0278 JB |
2384 | lisp_eval_depth--; |
2385 | if (backtrace.debug_on_exit) | |
2386 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2387 | backtrace_list = backtrace.next; | |
824eb35e | 2388 | |
db9f0278 JB |
2389 | return val; |
2390 | } | |
2391 | \f | |
a7ca3326 | 2392 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, |
9dbc9081 PJ |
2393 | doc: /* Call FUNCTION with our remaining args, using our last arg as list of args. |
2394 | Then return the value FUNCTION returns. | |
2395 | Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
2396 | usage: (apply FUNCTION &rest ARGUMENTS) */) | |
f66c7cf8 | 2397 | (ptrdiff_t nargs, Lisp_Object *args) |
db9f0278 | 2398 | { |
f66c7cf8 | 2399 | ptrdiff_t i, numargs; |
db9f0278 JB |
2400 | register Lisp_Object spread_arg; |
2401 | register Lisp_Object *funcall_args; | |
3a7a9129 | 2402 | Lisp_Object fun, retval; |
96d44c64 | 2403 | struct gcpro gcpro1; |
3a7a9129 | 2404 | USE_SAFE_ALLOCA; |
db9f0278 JB |
2405 | |
2406 | fun = args [0]; | |
2407 | funcall_args = 0; | |
2408 | spread_arg = args [nargs - 1]; | |
b7826503 | 2409 | CHECK_LIST (spread_arg); |
177c0ea7 | 2410 | |
db9f0278 JB |
2411 | numargs = XINT (Flength (spread_arg)); |
2412 | ||
2413 | if (numargs == 0) | |
2414 | return Ffuncall (nargs - 1, args); | |
2415 | else if (numargs == 1) | |
2416 | { | |
03699b14 | 2417 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2418 | return Ffuncall (nargs, args); |
2419 | } | |
2420 | ||
a6e3fa71 | 2421 | numargs += nargs - 2; |
db9f0278 | 2422 | |
8788120f KS |
2423 | /* Optimize for no indirection. */ |
2424 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2425 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2426 | fun = indirect_function (fun); | |
ffd56f97 | 2427 | if (EQ (fun, Qunbound)) |
db9f0278 | 2428 | { |
f6d62986 | 2429 | /* Let funcall get the error. */ |
ffd56f97 JB |
2430 | fun = args[0]; |
2431 | goto funcall; | |
db9f0278 JB |
2432 | } |
2433 | ||
90165123 | 2434 | if (SUBRP (fun)) |
db9f0278 JB |
2435 | { |
2436 | if (numargs < XSUBR (fun)->min_args | |
2437 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
f6d62986 | 2438 | goto funcall; /* Let funcall get the error. */ |
c5101a77 | 2439 | else if (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args > numargs) |
db9f0278 JB |
2440 | { |
2441 | /* Avoid making funcall cons up a yet another new vector of arguments | |
f6d62986 | 2442 | by explicitly supplying nil's for optional values. */ |
b72e0717 | 2443 | SAFE_ALLOCA_LISP (funcall_args, 1 + XSUBR (fun)->max_args); |
db9f0278 JB |
2444 | for (i = numargs; i < XSUBR (fun)->max_args;) |
2445 | funcall_args[++i] = Qnil; | |
96d44c64 SM |
2446 | GCPRO1 (*funcall_args); |
2447 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2448 | } |
2449 | } | |
2450 | funcall: | |
2451 | /* We add 1 to numargs because funcall_args includes the | |
2452 | function itself as well as its arguments. */ | |
2453 | if (!funcall_args) | |
a6e3fa71 | 2454 | { |
b72e0717 | 2455 | SAFE_ALLOCA_LISP (funcall_args, 1 + numargs); |
96d44c64 SM |
2456 | GCPRO1 (*funcall_args); |
2457 | gcpro1.nvars = 1 + numargs; | |
a6e3fa71 JB |
2458 | } |
2459 | ||
72af86bd | 2460 | memcpy (funcall_args, args, nargs * sizeof (Lisp_Object)); |
db9f0278 JB |
2461 | /* Spread the last arg we got. Its first element goes in |
2462 | the slot that it used to occupy, hence this value of I. */ | |
2463 | i = nargs - 1; | |
265a9e55 | 2464 | while (!NILP (spread_arg)) |
db9f0278 | 2465 | { |
03699b14 KR |
2466 | funcall_args [i++] = XCAR (spread_arg); |
2467 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2468 | } |
a6e3fa71 | 2469 | |
96d44c64 | 2470 | /* By convention, the caller needs to gcpro Ffuncall's args. */ |
3a7a9129 CY |
2471 | retval = Ffuncall (gcpro1.nvars, funcall_args); |
2472 | UNGCPRO; | |
2473 | SAFE_FREE (); | |
2474 | ||
2475 | return retval; | |
db9f0278 JB |
2476 | } |
2477 | \f | |
ff936e53 SM |
2478 | /* Run hook variables in various ways. */ |
2479 | ||
f6d62986 | 2480 | static Lisp_Object |
f66c7cf8 | 2481 | funcall_nil (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2482 | { |
2483 | Ffuncall (nargs, args); | |
2484 | return Qnil; | |
2485 | } | |
ff936e53 | 2486 | |
a7ca3326 | 2487 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
9f685258 | 2488 | doc: /* Run each hook in HOOKS. |
9dbc9081 PJ |
2489 | Each argument should be a symbol, a hook variable. |
2490 | These symbols are processed in the order specified. | |
2491 | If a hook symbol has a non-nil value, that value may be a function | |
2492 | or a list of functions to be called to run the hook. | |
2493 | If the value is a function, it is called with no arguments. | |
2494 | If it is a list, the elements are called, in order, with no arguments. | |
2495 | ||
9f685258 LK |
2496 | Major modes should not use this function directly to run their mode |
2497 | hook; they should use `run-mode-hooks' instead. | |
2498 | ||
72e85d5d RS |
2499 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2500 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2501 | usage: (run-hooks &rest HOOKS) */) |
f66c7cf8 | 2502 | (ptrdiff_t nargs, Lisp_Object *args) |
ff936e53 SM |
2503 | { |
2504 | Lisp_Object hook[1]; | |
f66c7cf8 | 2505 | ptrdiff_t i; |
ff936e53 SM |
2506 | |
2507 | for (i = 0; i < nargs; i++) | |
2508 | { | |
2509 | hook[0] = args[i]; | |
f6d62986 | 2510 | run_hook_with_args (1, hook, funcall_nil); |
ff936e53 SM |
2511 | } |
2512 | ||
2513 | return Qnil; | |
2514 | } | |
177c0ea7 | 2515 | |
a7ca3326 | 2516 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
9dbc9081 PJ |
2517 | Srun_hook_with_args, 1, MANY, 0, |
2518 | doc: /* Run HOOK with the specified arguments ARGS. | |
2519 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
2520 | value, that value may be a function or a list of functions to be | |
2521 | called to run the hook. If the value is a function, it is called with | |
2522 | the given arguments and its return value is returned. If it is a list | |
2523 | of functions, those functions are called, in order, | |
2524 | with the given arguments ARGS. | |
d5e2c90c | 2525 | It is best not to depend on the value returned by `run-hook-with-args', |
9dbc9081 PJ |
2526 | as that may change. |
2527 | ||
72e85d5d RS |
2528 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2529 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2530 | usage: (run-hook-with-args HOOK &rest ARGS) */) |
f66c7cf8 | 2531 | (ptrdiff_t nargs, Lisp_Object *args) |
ff936e53 | 2532 | { |
f6d62986 | 2533 | return run_hook_with_args (nargs, args, funcall_nil); |
ff936e53 SM |
2534 | } |
2535 | ||
a0d76c27 | 2536 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
9dbc9081 PJ |
2537 | Srun_hook_with_args_until_success, 1, MANY, 0, |
2538 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2539 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2540 | value, that value may be a function or a list of functions to be | |
2541 | called to run the hook. If the value is a function, it is called with | |
2542 | the given arguments and its return value is returned. | |
2543 | If it is a list of functions, those functions are called, in order, | |
2544 | with the given arguments ARGS, until one of them | |
9dbc9081 | 2545 | returns a non-nil value. Then we return that value. |
d5e2c90c | 2546 | However, if they all return nil, we return nil. |
9dbc9081 | 2547 | |
72e85d5d RS |
2548 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2549 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2550 | usage: (run-hook-with-args-until-success HOOK &rest ARGS) */) |
f66c7cf8 | 2551 | (ptrdiff_t nargs, Lisp_Object *args) |
b0b667cb | 2552 | { |
f6d62986 SM |
2553 | return run_hook_with_args (nargs, args, Ffuncall); |
2554 | } | |
2555 | ||
2556 | static Lisp_Object | |
f66c7cf8 | 2557 | funcall_not (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2558 | { |
2559 | return NILP (Ffuncall (nargs, args)) ? Qt : Qnil; | |
ff936e53 SM |
2560 | } |
2561 | ||
a7ca3326 | 2562 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
9dbc9081 PJ |
2563 | Srun_hook_with_args_until_failure, 1, MANY, 0, |
2564 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2565 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2566 | value, that value may be a function or a list of functions to be | |
2567 | called to run the hook. If the value is a function, it is called with | |
2568 | the given arguments and its return value is returned. | |
2569 | If it is a list of functions, those functions are called, in order, | |
2570 | with the given arguments ARGS, until one of them returns nil. | |
2571 | Then we return nil. However, if they all return non-nil, we return non-nil. | |
9dbc9081 | 2572 | |
72e85d5d RS |
2573 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2574 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2575 | usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */) |
f66c7cf8 | 2576 | (ptrdiff_t nargs, Lisp_Object *args) |
ff936e53 | 2577 | { |
f6d62986 | 2578 | return NILP (run_hook_with_args (nargs, args, funcall_not)) ? Qt : Qnil; |
ff936e53 SM |
2579 | } |
2580 | ||
f6d62986 | 2581 | static Lisp_Object |
f66c7cf8 | 2582 | run_hook_wrapped_funcall (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2583 | { |
2584 | Lisp_Object tmp = args[0], ret; | |
2585 | args[0] = args[1]; | |
2586 | args[1] = tmp; | |
2587 | ret = Ffuncall (nargs, args); | |
2588 | args[1] = args[0]; | |
2589 | args[0] = tmp; | |
2590 | return ret; | |
2591 | } | |
2592 | ||
2593 | DEFUN ("run-hook-wrapped", Frun_hook_wrapped, Srun_hook_wrapped, 2, MANY, 0, | |
2594 | doc: /* Run HOOK, passing each function through WRAP-FUNCTION. | |
2595 | I.e. instead of calling each function FUN directly with arguments ARGS, | |
2596 | it calls WRAP-FUNCTION with arguments FUN and ARGS. | |
2597 | As soon as a call to WRAP-FUNCTION returns non-nil, `run-hook-wrapped' | |
2598 | aborts and returns that value. | |
2599 | usage: (run-hook-wrapped HOOK WRAP-FUNCTION &rest ARGS) */) | |
f66c7cf8 | 2600 | (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2601 | { |
2602 | return run_hook_with_args (nargs, args, run_hook_wrapped_funcall); | |
2603 | } | |
ff936e53 | 2604 | |
c933ea05 RS |
2605 | /* ARGS[0] should be a hook symbol. |
2606 | Call each of the functions in the hook value, passing each of them | |
2607 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
f6d62986 | 2608 | FUNCALL specifies how to call each function on the hook. |
c933ea05 RS |
2609 | The caller (or its caller, etc) must gcpro all of ARGS, |
2610 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2611 | ||
f6d62986 | 2612 | Lisp_Object |
f66c7cf8 PE |
2613 | run_hook_with_args (ptrdiff_t nargs, Lisp_Object *args, |
2614 | Lisp_Object (*funcall) (ptrdiff_t nargs, Lisp_Object *args)) | |
ff936e53 | 2615 | { |
f6d62986 | 2616 | Lisp_Object sym, val, ret = Qnil; |
fada05d6 | 2617 | struct gcpro gcpro1, gcpro2, gcpro3; |
b0b667cb | 2618 | |
f029ca5f RS |
2619 | /* If we are dying or still initializing, |
2620 | don't do anything--it would probably crash if we tried. */ | |
2621 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2622 | return Qnil; |
f029ca5f | 2623 | |
b0b667cb | 2624 | sym = args[0]; |
aa681b51 | 2625 | val = find_symbol_value (sym); |
ff936e53 | 2626 | |
b0b667cb | 2627 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2628 | return ret; |
03699b14 | 2629 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2630 | { |
2631 | args[0] = val; | |
f6d62986 | 2632 | return funcall (nargs, args); |
b0b667cb KH |
2633 | } |
2634 | else | |
2635 | { | |
1faed8ae PE |
2636 | Lisp_Object global_vals = Qnil; |
2637 | GCPRO3 (sym, val, global_vals); | |
cb9d21f8 | 2638 | |
ff936e53 | 2639 | for (; |
f6d62986 | 2640 | CONSP (val) && NILP (ret); |
03699b14 | 2641 | val = XCDR (val)) |
b0b667cb | 2642 | { |
03699b14 | 2643 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2644 | { |
2645 | /* t indicates this hook has a local binding; | |
2646 | it means to run the global binding too. */ | |
1faed8ae PE |
2647 | global_vals = Fdefault_value (sym); |
2648 | if (NILP (global_vals)) continue; | |
b0b667cb | 2649 | |
1faed8ae | 2650 | if (!CONSP (global_vals) || EQ (XCAR (global_vals), Qlambda)) |
b0b667cb | 2651 | { |
1faed8ae | 2652 | args[0] = global_vals; |
f6d62986 | 2653 | ret = funcall (nargs, args); |
8932b1c2 CY |
2654 | } |
2655 | else | |
2656 | { | |
2657 | for (; | |
f6d62986 | 2658 | CONSP (global_vals) && NILP (ret); |
1faed8ae | 2659 | global_vals = XCDR (global_vals)) |
8932b1c2 | 2660 | { |
1faed8ae | 2661 | args[0] = XCAR (global_vals); |
8932b1c2 CY |
2662 | /* In a global value, t should not occur. If it does, we |
2663 | must ignore it to avoid an endless loop. */ | |
2664 | if (!EQ (args[0], Qt)) | |
f6d62986 | 2665 | ret = funcall (nargs, args); |
8932b1c2 | 2666 | } |
b0b667cb KH |
2667 | } |
2668 | } | |
2669 | else | |
2670 | { | |
03699b14 | 2671 | args[0] = XCAR (val); |
f6d62986 | 2672 | ret = funcall (nargs, args); |
b0b667cb KH |
2673 | } |
2674 | } | |
cb9d21f8 RS |
2675 | |
2676 | UNGCPRO; | |
ff936e53 | 2677 | return ret; |
b0b667cb KH |
2678 | } |
2679 | } | |
c933ea05 | 2680 | |
7d48558f RS |
2681 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ |
2682 | ||
2683 | void | |
d3da34e0 | 2684 | run_hook_with_args_2 (Lisp_Object hook, Lisp_Object arg1, Lisp_Object arg2) |
7d48558f RS |
2685 | { |
2686 | Lisp_Object temp[3]; | |
2687 | temp[0] = hook; | |
2688 | temp[1] = arg1; | |
2689 | temp[2] = arg2; | |
2690 | ||
2691 | Frun_hook_with_args (3, temp); | |
2692 | } | |
ff936e53 | 2693 | \f |
f6d62986 | 2694 | /* Apply fn to arg. */ |
db9f0278 | 2695 | Lisp_Object |
d3da34e0 | 2696 | apply1 (Lisp_Object fn, Lisp_Object arg) |
db9f0278 | 2697 | { |
a6e3fa71 JB |
2698 | struct gcpro gcpro1; |
2699 | ||
2700 | GCPRO1 (fn); | |
265a9e55 | 2701 | if (NILP (arg)) |
a6e3fa71 JB |
2702 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2703 | gcpro1.nvars = 2; | |
db9f0278 JB |
2704 | { |
2705 | Lisp_Object args[2]; | |
2706 | args[0] = fn; | |
2707 | args[1] = arg; | |
a6e3fa71 JB |
2708 | gcpro1.var = args; |
2709 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 | 2710 | } |
db9f0278 JB |
2711 | } |
2712 | ||
f6d62986 | 2713 | /* Call function fn on no arguments. */ |
db9f0278 | 2714 | Lisp_Object |
d3da34e0 | 2715 | call0 (Lisp_Object fn) |
db9f0278 | 2716 | { |
a6e3fa71 JB |
2717 | struct gcpro gcpro1; |
2718 | ||
2719 | GCPRO1 (fn); | |
2720 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2721 | } |
2722 | ||
f6d62986 | 2723 | /* Call function fn with 1 argument arg1. */ |
db9f0278 JB |
2724 | /* ARGSUSED */ |
2725 | Lisp_Object | |
d3da34e0 | 2726 | call1 (Lisp_Object fn, Lisp_Object arg1) |
db9f0278 | 2727 | { |
a6e3fa71 | 2728 | struct gcpro gcpro1; |
177c0ea7 | 2729 | Lisp_Object args[2]; |
a6e3fa71 | 2730 | |
db9f0278 | 2731 | args[0] = fn; |
15285f9f | 2732 | args[1] = arg1; |
a6e3fa71 JB |
2733 | GCPRO1 (args[0]); |
2734 | gcpro1.nvars = 2; | |
2735 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 JB |
2736 | } |
2737 | ||
f6d62986 | 2738 | /* Call function fn with 2 arguments arg1, arg2. */ |
db9f0278 JB |
2739 | /* ARGSUSED */ |
2740 | Lisp_Object | |
d3da34e0 | 2741 | call2 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2) |
db9f0278 | 2742 | { |
a6e3fa71 | 2743 | struct gcpro gcpro1; |
db9f0278 JB |
2744 | Lisp_Object args[3]; |
2745 | args[0] = fn; | |
15285f9f RS |
2746 | args[1] = arg1; |
2747 | args[2] = arg2; | |
a6e3fa71 JB |
2748 | GCPRO1 (args[0]); |
2749 | gcpro1.nvars = 3; | |
2750 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 JB |
2751 | } |
2752 | ||
f6d62986 | 2753 | /* Call function fn with 3 arguments arg1, arg2, arg3. */ |
db9f0278 JB |
2754 | /* ARGSUSED */ |
2755 | Lisp_Object | |
d3da34e0 | 2756 | call3 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
db9f0278 | 2757 | { |
a6e3fa71 | 2758 | struct gcpro gcpro1; |
db9f0278 JB |
2759 | Lisp_Object args[4]; |
2760 | args[0] = fn; | |
15285f9f RS |
2761 | args[1] = arg1; |
2762 | args[2] = arg2; | |
2763 | args[3] = arg3; | |
a6e3fa71 JB |
2764 | GCPRO1 (args[0]); |
2765 | gcpro1.nvars = 4; | |
2766 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 JB |
2767 | } |
2768 | ||
f6d62986 | 2769 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4. */ |
a5a44b91 JB |
2770 | /* ARGSUSED */ |
2771 | Lisp_Object | |
d3da34e0 JB |
2772 | call4 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2773 | Lisp_Object arg4) | |
a5a44b91 JB |
2774 | { |
2775 | struct gcpro gcpro1; | |
a5a44b91 JB |
2776 | Lisp_Object args[5]; |
2777 | args[0] = fn; | |
15285f9f RS |
2778 | args[1] = arg1; |
2779 | args[2] = arg2; | |
2780 | args[3] = arg3; | |
2781 | args[4] = arg4; | |
a5a44b91 JB |
2782 | GCPRO1 (args[0]); |
2783 | gcpro1.nvars = 5; | |
2784 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
a5a44b91 JB |
2785 | } |
2786 | ||
f6d62986 | 2787 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5. */ |
15285f9f RS |
2788 | /* ARGSUSED */ |
2789 | Lisp_Object | |
d3da34e0 JB |
2790 | call5 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2791 | Lisp_Object arg4, Lisp_Object arg5) | |
15285f9f RS |
2792 | { |
2793 | struct gcpro gcpro1; | |
15285f9f RS |
2794 | Lisp_Object args[6]; |
2795 | args[0] = fn; | |
2796 | args[1] = arg1; | |
2797 | args[2] = arg2; | |
2798 | args[3] = arg3; | |
2799 | args[4] = arg4; | |
2800 | args[5] = arg5; | |
2801 | GCPRO1 (args[0]); | |
2802 | gcpro1.nvars = 6; | |
2803 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
15285f9f RS |
2804 | } |
2805 | ||
f6d62986 | 2806 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6. */ |
15285f9f RS |
2807 | /* ARGSUSED */ |
2808 | Lisp_Object | |
d3da34e0 JB |
2809 | call6 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2810 | Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6) | |
15285f9f RS |
2811 | { |
2812 | struct gcpro gcpro1; | |
15285f9f RS |
2813 | Lisp_Object args[7]; |
2814 | args[0] = fn; | |
2815 | args[1] = arg1; | |
2816 | args[2] = arg2; | |
2817 | args[3] = arg3; | |
2818 | args[4] = arg4; | |
2819 | args[5] = arg5; | |
2820 | args[6] = arg6; | |
2821 | GCPRO1 (args[0]); | |
2822 | gcpro1.nvars = 7; | |
2823 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
15285f9f RS |
2824 | } |
2825 | ||
f6d62986 | 2826 | /* Call function fn with 7 arguments arg1, arg2, arg3, arg4, arg5, arg6, arg7. */ |
574c05e2 KK |
2827 | /* ARGSUSED */ |
2828 | Lisp_Object | |
d3da34e0 JB |
2829 | call7 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2830 | Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6, Lisp_Object arg7) | |
574c05e2 KK |
2831 | { |
2832 | struct gcpro gcpro1; | |
574c05e2 KK |
2833 | Lisp_Object args[8]; |
2834 | args[0] = fn; | |
2835 | args[1] = arg1; | |
2836 | args[2] = arg2; | |
2837 | args[3] = arg3; | |
2838 | args[4] = arg4; | |
2839 | args[5] = arg5; | |
2840 | args[6] = arg6; | |
2841 | args[7] = arg7; | |
2842 | GCPRO1 (args[0]); | |
2843 | gcpro1.nvars = 8; | |
2844 | RETURN_UNGCPRO (Ffuncall (8, args)); | |
574c05e2 KK |
2845 | } |
2846 | ||
6c2ef893 RS |
2847 | /* The caller should GCPRO all the elements of ARGS. */ |
2848 | ||
a7ca3326 | 2849 | DEFUN ("functionp", Ffunctionp, Sfunctionp, 1, 1, 0, |
7200d79c | 2850 | doc: /* Non-nil if OBJECT is a function. */) |
c566235d | 2851 | (Lisp_Object object) |
b9598260 SM |
2852 | { |
2853 | if (SYMBOLP (object) && !NILP (Ffboundp (object))) | |
2854 | { | |
ba83908c | 2855 | object = Findirect_function (object, Qt); |
b9598260 SM |
2856 | |
2857 | if (CONSP (object) && EQ (XCAR (object), Qautoload)) | |
2858 | { | |
2859 | /* Autoloaded symbols are functions, except if they load | |
2860 | macros or keymaps. */ | |
2861 | int i; | |
2862 | for (i = 0; i < 4 && CONSP (object); i++) | |
2863 | object = XCDR (object); | |
2864 | ||
2865 | return (CONSP (object) && !NILP (XCAR (object))) ? Qnil : Qt; | |
2866 | } | |
2867 | } | |
2868 | ||
2869 | if (SUBRP (object)) | |
3c3ddb98 | 2870 | return (XSUBR (object)->max_args != UNEVALLED) ? Qt : Qnil; |
876c194c | 2871 | else if (COMPILEDP (object)) |
b9598260 SM |
2872 | return Qt; |
2873 | else if (CONSP (object)) | |
2874 | { | |
2875 | Lisp_Object car = XCAR (object); | |
2876 | return (EQ (car, Qlambda) || EQ (car, Qclosure)) ? Qt : Qnil; | |
2877 | } | |
2878 | else | |
2879 | return Qnil; | |
2880 | } | |
2881 | ||
a7ca3326 | 2882 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
9dbc9081 PJ |
2883 | doc: /* Call first argument as a function, passing remaining arguments to it. |
2884 | Return the value that function returns. | |
2885 | Thus, (funcall 'cons 'x 'y) returns (x . y). | |
2886 | usage: (funcall FUNCTION &rest ARGUMENTS) */) | |
f66c7cf8 | 2887 | (ptrdiff_t nargs, Lisp_Object *args) |
db9f0278 | 2888 | { |
8788120f | 2889 | Lisp_Object fun, original_fun; |
db9f0278 | 2890 | Lisp_Object funcar; |
f66c7cf8 | 2891 | ptrdiff_t numargs = nargs - 1; |
db9f0278 JB |
2892 | Lisp_Object lisp_numargs; |
2893 | Lisp_Object val; | |
2894 | struct backtrace backtrace; | |
2895 | register Lisp_Object *internal_args; | |
f66c7cf8 | 2896 | ptrdiff_t i; |
db9f0278 JB |
2897 | |
2898 | QUIT; | |
ee830945 RS |
2899 | if ((consing_since_gc > gc_cons_threshold |
2900 | && consing_since_gc > gc_relative_threshold) | |
2901 | || | |
2902 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
a6e3fa71 | 2903 | Fgarbage_collect (); |
db9f0278 JB |
2904 | |
2905 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2906 | { | |
2907 | if (max_lisp_eval_depth < 100) | |
2908 | max_lisp_eval_depth = 100; | |
2909 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2910 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2911 | } |
2912 | ||
2913 | backtrace.next = backtrace_list; | |
2914 | backtrace_list = &backtrace; | |
2915 | backtrace.function = &args[0]; | |
2916 | backtrace.args = &args[1]; | |
2917 | backtrace.nargs = nargs - 1; | |
db9f0278 JB |
2918 | backtrace.debug_on_exit = 0; |
2919 | ||
2920 | if (debug_on_next_call) | |
2921 | do_debug_on_call (Qlambda); | |
2922 | ||
fff3ff9c KS |
2923 | CHECK_CONS_LIST (); |
2924 | ||
8788120f KS |
2925 | original_fun = args[0]; |
2926 | ||
db9f0278 JB |
2927 | retry: |
2928 | ||
8788120f KS |
2929 | /* Optimize for no indirection. */ |
2930 | fun = original_fun; | |
2931 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2932 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2933 | fun = indirect_function (fun); | |
db9f0278 | 2934 | |
90165123 | 2935 | if (SUBRP (fun)) |
db9f0278 | 2936 | { |
ef1b0ba7 | 2937 | if (numargs < XSUBR (fun)->min_args |
db9f0278 JB |
2938 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) |
2939 | { | |
a631e24c | 2940 | XSETFASTINT (lisp_numargs, numargs); |
734d55a2 | 2941 | xsignal2 (Qwrong_number_of_arguments, original_fun, lisp_numargs); |
db9f0278 JB |
2942 | } |
2943 | ||
ef1b0ba7 | 2944 | else if (XSUBR (fun)->max_args == UNEVALLED) |
734d55a2 | 2945 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 | 2946 | |
ef1b0ba7 SM |
2947 | else if (XSUBR (fun)->max_args == MANY) |
2948 | val = (XSUBR (fun)->function.aMANY) (numargs, args + 1); | |
db9f0278 | 2949 | else |
db9f0278 | 2950 | { |
ef1b0ba7 SM |
2951 | if (XSUBR (fun)->max_args > numargs) |
2952 | { | |
2953 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
2954 | memcpy (internal_args, args + 1, numargs * sizeof (Lisp_Object)); | |
2955 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
2956 | internal_args[i] = Qnil; | |
2957 | } | |
2958 | else | |
2959 | internal_args = args + 1; | |
2960 | switch (XSUBR (fun)->max_args) | |
2961 | { | |
2962 | case 0: | |
2963 | val = (XSUBR (fun)->function.a0 ()); | |
2964 | break; | |
2965 | case 1: | |
2966 | val = (XSUBR (fun)->function.a1 (internal_args[0])); | |
2967 | break; | |
2968 | case 2: | |
2969 | val = (XSUBR (fun)->function.a2 | |
2970 | (internal_args[0], internal_args[1])); | |
2971 | break; | |
2972 | case 3: | |
2973 | val = (XSUBR (fun)->function.a3 | |
2974 | (internal_args[0], internal_args[1], internal_args[2])); | |
2975 | break; | |
2976 | case 4: | |
2977 | val = (XSUBR (fun)->function.a4 | |
2978 | (internal_args[0], internal_args[1], internal_args[2], | |
2979 | internal_args[3])); | |
2980 | break; | |
2981 | case 5: | |
2982 | val = (XSUBR (fun)->function.a5 | |
2983 | (internal_args[0], internal_args[1], internal_args[2], | |
2984 | internal_args[3], internal_args[4])); | |
2985 | break; | |
2986 | case 6: | |
2987 | val = (XSUBR (fun)->function.a6 | |
2988 | (internal_args[0], internal_args[1], internal_args[2], | |
2989 | internal_args[3], internal_args[4], internal_args[5])); | |
2990 | break; | |
2991 | case 7: | |
2992 | val = (XSUBR (fun)->function.a7 | |
2993 | (internal_args[0], internal_args[1], internal_args[2], | |
2994 | internal_args[3], internal_args[4], internal_args[5], | |
2995 | internal_args[6])); | |
2996 | break; | |
2997 | ||
2998 | case 8: | |
2999 | val = (XSUBR (fun)->function.a8 | |
3000 | (internal_args[0], internal_args[1], internal_args[2], | |
3001 | internal_args[3], internal_args[4], internal_args[5], | |
3002 | internal_args[6], internal_args[7])); | |
3003 | break; | |
3004 | ||
3005 | default: | |
3006 | ||
3007 | /* If a subr takes more than 8 arguments without using MANY | |
3008 | or UNEVALLED, we need to extend this function to support it. | |
3009 | Until this is done, there is no way to call the function. */ | |
3010 | abort (); | |
3011 | } | |
db9f0278 JB |
3012 | } |
3013 | } | |
ef1b0ba7 | 3014 | else if (COMPILEDP (fun)) |
db9f0278 JB |
3015 | val = funcall_lambda (fun, numargs, args + 1); |
3016 | else | |
3017 | { | |
8788120f | 3018 | if (EQ (fun, Qunbound)) |
734d55a2 | 3019 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 3020 | if (!CONSP (fun)) |
734d55a2 KS |
3021 | xsignal1 (Qinvalid_function, original_fun); |
3022 | funcar = XCAR (fun); | |
90165123 | 3023 | if (!SYMBOLP (funcar)) |
734d55a2 | 3024 | xsignal1 (Qinvalid_function, original_fun); |
defb1411 SM |
3025 | if (EQ (funcar, Qlambda) |
3026 | || EQ (funcar, Qclosure)) | |
db9f0278 | 3027 | val = funcall_lambda (fun, numargs, args + 1); |
db9f0278 JB |
3028 | else if (EQ (funcar, Qautoload)) |
3029 | { | |
8788120f | 3030 | do_autoload (fun, original_fun); |
fff3ff9c | 3031 | CHECK_CONS_LIST (); |
db9f0278 JB |
3032 | goto retry; |
3033 | } | |
3034 | else | |
734d55a2 | 3035 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 | 3036 | } |
c1788fbc | 3037 | CHECK_CONS_LIST (); |
db9f0278 JB |
3038 | lisp_eval_depth--; |
3039 | if (backtrace.debug_on_exit) | |
3040 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
3041 | backtrace_list = backtrace.next; | |
3042 | return val; | |
3043 | } | |
3044 | \f | |
2f7c71a1 | 3045 | static Lisp_Object |
defb1411 | 3046 | apply_lambda (Lisp_Object fun, Lisp_Object args) |
db9f0278 JB |
3047 | { |
3048 | Lisp_Object args_left; | |
f66c7cf8 | 3049 | ptrdiff_t i, numargs; |
db9f0278 JB |
3050 | register Lisp_Object *arg_vector; |
3051 | struct gcpro gcpro1, gcpro2, gcpro3; | |
db9f0278 | 3052 | register Lisp_Object tem; |
3a7a9129 | 3053 | USE_SAFE_ALLOCA; |
db9f0278 | 3054 | |
f66c7cf8 | 3055 | numargs = XFASTINT (Flength (args)); |
c5101a77 | 3056 | SAFE_ALLOCA_LISP (arg_vector, numargs); |
db9f0278 JB |
3057 | args_left = args; |
3058 | ||
3059 | GCPRO3 (*arg_vector, args_left, fun); | |
3060 | gcpro1.nvars = 0; | |
3061 | ||
c5101a77 | 3062 | for (i = 0; i < numargs; ) |
db9f0278 JB |
3063 | { |
3064 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
defb1411 | 3065 | tem = eval_sub (tem); |
db9f0278 JB |
3066 | arg_vector[i++] = tem; |
3067 | gcpro1.nvars = i; | |
3068 | } | |
3069 | ||
3070 | UNGCPRO; | |
3071 | ||
f07a954e SM |
3072 | backtrace_list->args = arg_vector; |
3073 | backtrace_list->nargs = i; | |
c5101a77 | 3074 | tem = funcall_lambda (fun, numargs, arg_vector); |
db9f0278 JB |
3075 | |
3076 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
3077 | if (backtrace_list->debug_on_exit) | |
3078 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
3079 | /* Don't do it again when we return to eval. */ | |
3080 | backtrace_list->debug_on_exit = 0; | |
3a7a9129 | 3081 | SAFE_FREE (); |
db9f0278 JB |
3082 | return tem; |
3083 | } | |
3084 | ||
3085 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
3086 | and return the result of evaluation. | |
3087 | FUN must be either a lambda-expression or a compiled-code object. */ | |
3088 | ||
2901f1d1 | 3089 | static Lisp_Object |
f66c7cf8 | 3090 | funcall_lambda (Lisp_Object fun, ptrdiff_t nargs, |
c5101a77 | 3091 | register Lisp_Object *arg_vector) |
db9f0278 | 3092 | { |
defb1411 | 3093 | Lisp_Object val, syms_left, next, lexenv; |
aed13378 | 3094 | int count = SPECPDL_INDEX (); |
f66c7cf8 | 3095 | ptrdiff_t i; |
c5101a77 | 3096 | int optional, rest; |
db9f0278 | 3097 | |
90165123 | 3098 | if (CONSP (fun)) |
9ab90667 | 3099 | { |
defb1411 SM |
3100 | if (EQ (XCAR (fun), Qclosure)) |
3101 | { | |
3102 | fun = XCDR (fun); /* Drop `closure'. */ | |
3103 | lexenv = XCAR (fun); | |
23aba0ea | 3104 | CHECK_LIST_CONS (fun, fun); |
defb1411 SM |
3105 | } |
3106 | else | |
3107 | lexenv = Qnil; | |
9ab90667 GM |
3108 | syms_left = XCDR (fun); |
3109 | if (CONSP (syms_left)) | |
3110 | syms_left = XCAR (syms_left); | |
3111 | else | |
734d55a2 | 3112 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3113 | } |
90165123 | 3114 | else if (COMPILEDP (fun)) |
defb1411 | 3115 | { |
798cb644 SM |
3116 | syms_left = AREF (fun, COMPILED_ARGLIST); |
3117 | if (INTEGERP (syms_left)) | |
876c194c SM |
3118 | /* A byte-code object with a non-nil `push args' slot means we |
3119 | shouldn't bind any arguments, instead just call the byte-code | |
3120 | interpreter directly; it will push arguments as necessary. | |
3121 | ||
9173deec | 3122 | Byte-code objects with either a non-existent, or a nil value for |
876c194c SM |
3123 | the `push args' slot (the default), have dynamically-bound |
3124 | arguments, and use the argument-binding code below instead (as do | |
3125 | all interpreted functions, even lexically bound ones). */ | |
3126 | { | |
3127 | /* If we have not actually read the bytecode string | |
3128 | and constants vector yet, fetch them from the file. */ | |
3129 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) | |
3130 | Ffetch_bytecode (fun); | |
3131 | return exec_byte_code (AREF (fun, COMPILED_BYTECODE), | |
3132 | AREF (fun, COMPILED_CONSTANTS), | |
3133 | AREF (fun, COMPILED_STACK_DEPTH), | |
798cb644 | 3134 | syms_left, |
876c194c SM |
3135 | nargs, arg_vector); |
3136 | } | |
defb1411 SM |
3137 | lexenv = Qnil; |
3138 | } | |
9ab90667 GM |
3139 | else |
3140 | abort (); | |
db9f0278 | 3141 | |
9ab90667 GM |
3142 | i = optional = rest = 0; |
3143 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
3144 | { |
3145 | QUIT; | |
177c0ea7 | 3146 | |
9ab90667 | 3147 | next = XCAR (syms_left); |
8788120f | 3148 | if (!SYMBOLP (next)) |
734d55a2 | 3149 | xsignal1 (Qinvalid_function, fun); |
177c0ea7 | 3150 | |
db9f0278 JB |
3151 | if (EQ (next, Qand_rest)) |
3152 | rest = 1; | |
3153 | else if (EQ (next, Qand_optional)) | |
3154 | optional = 1; | |
db9f0278 | 3155 | else |
db9f0278 | 3156 | { |
e610eaca | 3157 | Lisp_Object arg; |
defb1411 SM |
3158 | if (rest) |
3159 | { | |
e610eaca | 3160 | arg = Flist (nargs - i, &arg_vector[i]); |
defb1411 SM |
3161 | i = nargs; |
3162 | } | |
3163 | else if (i < nargs) | |
e610eaca | 3164 | arg = arg_vector[i++]; |
b9598260 SM |
3165 | else if (!optional) |
3166 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); | |
3167 | else | |
e610eaca | 3168 | arg = Qnil; |
7200d79c | 3169 | |
b9598260 | 3170 | /* Bind the argument. */ |
876c194c | 3171 | if (!NILP (lexenv) && SYMBOLP (next)) |
b9598260 | 3172 | /* Lexically bind NEXT by adding it to the lexenv alist. */ |
e610eaca | 3173 | lexenv = Fcons (Fcons (next, arg), lexenv); |
b9598260 SM |
3174 | else |
3175 | /* Dynamically bind NEXT. */ | |
e610eaca | 3176 | specbind (next, arg); |
db9f0278 | 3177 | } |
db9f0278 JB |
3178 | } |
3179 | ||
9ab90667 | 3180 | if (!NILP (syms_left)) |
734d55a2 | 3181 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3182 | else if (i < nargs) |
734d55a2 | 3183 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 | 3184 | |
b9598260 SM |
3185 | if (!EQ (lexenv, Vinternal_interpreter_environment)) |
3186 | /* Instantiate a new lexical environment. */ | |
3187 | specbind (Qinternal_interpreter_environment, lexenv); | |
3188 | ||
90165123 | 3189 | if (CONSP (fun)) |
9ab90667 | 3190 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 3191 | else |
ca248607 RS |
3192 | { |
3193 | /* If we have not actually read the bytecode string | |
3194 | and constants vector yet, fetch them from the file. */ | |
845975f5 | 3195 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) |
661c7d6e | 3196 | Ffetch_bytecode (fun); |
b9598260 SM |
3197 | val = exec_byte_code (AREF (fun, COMPILED_BYTECODE), |
3198 | AREF (fun, COMPILED_CONSTANTS), | |
3199 | AREF (fun, COMPILED_STACK_DEPTH), | |
3200 | Qnil, 0, 0); | |
ca248607 | 3201 | } |
177c0ea7 | 3202 | |
db9f0278 JB |
3203 | return unbind_to (count, val); |
3204 | } | |
661c7d6e KH |
3205 | |
3206 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
9dbc9081 PJ |
3207 | 1, 1, 0, |
3208 | doc: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */) | |
5842a27b | 3209 | (Lisp_Object object) |
661c7d6e KH |
3210 | { |
3211 | Lisp_Object tem; | |
3212 | ||
845975f5 | 3213 | if (COMPILEDP (object) && CONSP (AREF (object, COMPILED_BYTECODE))) |
661c7d6e | 3214 | { |
845975f5 | 3215 | tem = read_doc_string (AREF (object, COMPILED_BYTECODE)); |
5bbdb090 | 3216 | if (!CONSP (tem)) |
845975f5 SM |
3217 | { |
3218 | tem = AREF (object, COMPILED_BYTECODE); | |
3219 | if (CONSP (tem) && STRINGP (XCAR (tem))) | |
d5db4077 | 3220 | error ("Invalid byte code in %s", SDATA (XCAR (tem))); |
845975f5 SM |
3221 | else |
3222 | error ("Invalid byte code"); | |
3223 | } | |
3ae565b3 SM |
3224 | ASET (object, COMPILED_BYTECODE, XCAR (tem)); |
3225 | ASET (object, COMPILED_CONSTANTS, XCDR (tem)); | |
661c7d6e KH |
3226 | } |
3227 | return object; | |
3228 | } | |
db9f0278 | 3229 | \f |
475545b5 | 3230 | static void |
d3da34e0 | 3231 | grow_specpdl (void) |
db9f0278 | 3232 | { |
aed13378 | 3233 | register int count = SPECPDL_INDEX (); |
98e8eae1 PE |
3234 | int max_size = |
3235 | min (max_specpdl_size, | |
3236 | min (max (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct specbinding), | |
3237 | INT_MAX)); | |
3238 | int size; | |
3239 | if (max_size <= specpdl_size) | |
db9f0278 JB |
3240 | { |
3241 | if (max_specpdl_size < 400) | |
98e8eae1 PE |
3242 | max_size = max_specpdl_size = 400; |
3243 | if (max_size <= specpdl_size) | |
734d55a2 | 3244 | signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil); |
db9f0278 | 3245 | } |
98e8eae1 | 3246 | size = specpdl_size < max_size / 2 ? 2 * specpdl_size : max_size; |
0065d054 | 3247 | specpdl = xnrealloc (specpdl, size, sizeof *specpdl); |
98e8eae1 | 3248 | specpdl_size = size; |
db9f0278 JB |
3249 | specpdl_ptr = specpdl + count; |
3250 | } | |
3251 | ||
f6d62986 | 3252 | /* `specpdl_ptr->symbol' is a field which describes which variable is |
4e2db1fe SM |
3253 | let-bound, so it can be properly undone when we unbind_to. |
3254 | It can have the following two shapes: | |
3255 | - SYMBOL : if it's a plain symbol, it means that we have let-bound | |
3256 | a symbol that is not buffer-local (at least at the time | |
3257 | the let binding started). Note also that it should not be | |
3258 | aliased (i.e. when let-binding V1 that's aliased to V2, we want | |
3259 | to record V2 here). | |
3260 | - (SYMBOL WHERE . BUFFER) : this means that it is a let-binding for | |
3261 | variable SYMBOL which can be buffer-local. WHERE tells us | |
3262 | which buffer is affected (or nil if the let-binding affects the | |
3263 | global value of the variable) and BUFFER tells us which buffer was | |
3264 | current (i.e. if WHERE is non-nil, then BUFFER==WHERE, otherwise | |
3265 | BUFFER did not yet have a buffer-local value). */ | |
3266 | ||
db9f0278 | 3267 | void |
d3da34e0 | 3268 | specbind (Lisp_Object symbol, Lisp_Object value) |
db9f0278 | 3269 | { |
ce5b453a SM |
3270 | struct Lisp_Symbol *sym; |
3271 | ||
3272 | eassert (!handling_signal); | |
db9f0278 | 3273 | |
b7826503 | 3274 | CHECK_SYMBOL (symbol); |
ce5b453a | 3275 | sym = XSYMBOL (symbol); |
db9f0278 JB |
3276 | if (specpdl_ptr == specpdl + specpdl_size) |
3277 | grow_specpdl (); | |
719177b3 | 3278 | |
ce5b453a SM |
3279 | start: |
3280 | switch (sym->redirect) | |
719177b3 | 3281 | { |
ce5b453a SM |
3282 | case SYMBOL_VARALIAS: |
3283 | sym = indirect_variable (sym); XSETSYMBOL (symbol, sym); goto start; | |
3284 | case SYMBOL_PLAINVAL: | |
bb8e180f AS |
3285 | /* The most common case is that of a non-constant symbol with a |
3286 | trivial value. Make that as fast as we can. */ | |
3287 | specpdl_ptr->symbol = symbol; | |
3288 | specpdl_ptr->old_value = SYMBOL_VAL (sym); | |
3289 | specpdl_ptr->func = NULL; | |
3290 | ++specpdl_ptr; | |
3291 | if (!sym->constant) | |
3292 | SET_SYMBOL_VAL (sym, value); | |
3293 | else | |
3294 | set_internal (symbol, value, Qnil, 1); | |
3295 | break; | |
4e2db1fe SM |
3296 | case SYMBOL_LOCALIZED: |
3297 | if (SYMBOL_BLV (sym)->frame_local) | |
3298 | error ("Frame-local vars cannot be let-bound"); | |
3299 | case SYMBOL_FORWARDED: | |
ce5b453a SM |
3300 | { |
3301 | Lisp_Object ovalue = find_symbol_value (symbol); | |
3302 | specpdl_ptr->func = 0; | |
3303 | specpdl_ptr->old_value = ovalue; | |
3304 | ||
3305 | eassert (sym->redirect != SYMBOL_LOCALIZED | |
3306 | || (EQ (SYMBOL_BLV (sym)->where, | |
3307 | SYMBOL_BLV (sym)->frame_local ? | |
3308 | Fselected_frame () : Fcurrent_buffer ()))); | |
3309 | ||
3310 | if (sym->redirect == SYMBOL_LOCALIZED | |
3311 | || BUFFER_OBJFWDP (SYMBOL_FWD (sym))) | |
3312 | { | |
3313 | Lisp_Object where, cur_buf = Fcurrent_buffer (); | |
3314 | ||
3315 | /* For a local variable, record both the symbol and which | |
3316 | buffer's or frame's value we are saving. */ | |
3317 | if (!NILP (Flocal_variable_p (symbol, Qnil))) | |
3318 | { | |
3319 | eassert (sym->redirect != SYMBOL_LOCALIZED | |
3320 | || (BLV_FOUND (SYMBOL_BLV (sym)) | |
3321 | && EQ (cur_buf, SYMBOL_BLV (sym)->where))); | |
3322 | where = cur_buf; | |
3323 | } | |
3324 | else if (sym->redirect == SYMBOL_LOCALIZED | |
3325 | && BLV_FOUND (SYMBOL_BLV (sym))) | |
3326 | where = SYMBOL_BLV (sym)->where; | |
3327 | else | |
3328 | where = Qnil; | |
3329 | ||
3330 | /* We're not using the `unused' slot in the specbinding | |
3331 | structure because this would mean we have to do more | |
3332 | work for simple variables. */ | |
3333 | /* FIXME: The third value `current_buffer' is only used in | |
3334 | let_shadows_buffer_binding_p which is itself only used | |
3335 | in set_internal for local_if_set. */ | |
4e2db1fe | 3336 | eassert (NILP (where) || EQ (where, cur_buf)); |
ce5b453a SM |
3337 | specpdl_ptr->symbol = Fcons (symbol, Fcons (where, cur_buf)); |
3338 | ||
3339 | /* If SYMBOL is a per-buffer variable which doesn't have a | |
3340 | buffer-local value here, make the `let' change the global | |
3341 | value by changing the value of SYMBOL in all buffers not | |
3342 | having their own value. This is consistent with what | |
3343 | happens with other buffer-local variables. */ | |
3344 | if (NILP (where) | |
3345 | && sym->redirect == SYMBOL_FORWARDED) | |
3346 | { | |
3347 | eassert (BUFFER_OBJFWDP (SYMBOL_FWD (sym))); | |
3348 | ++specpdl_ptr; | |
3349 | Fset_default (symbol, value); | |
3350 | return; | |
3351 | } | |
3352 | } | |
3353 | else | |
3354 | specpdl_ptr->symbol = symbol; | |
3355 | ||
3356 | specpdl_ptr++; | |
94b612ad | 3357 | set_internal (symbol, value, Qnil, 1); |
ce5b453a SM |
3358 | break; |
3359 | } | |
3360 | default: abort (); | |
9ab90667 | 3361 | } |
db9f0278 JB |
3362 | } |
3363 | ||
3364 | void | |
d3da34e0 | 3365 | record_unwind_protect (Lisp_Object (*function) (Lisp_Object), Lisp_Object arg) |
db9f0278 | 3366 | { |
9ba8e10d CY |
3367 | eassert (!handling_signal); |
3368 | ||
db9f0278 JB |
3369 | if (specpdl_ptr == specpdl + specpdl_size) |
3370 | grow_specpdl (); | |
3371 | specpdl_ptr->func = function; | |
3372 | specpdl_ptr->symbol = Qnil; | |
3373 | specpdl_ptr->old_value = arg; | |
3374 | specpdl_ptr++; | |
3375 | } | |
3376 | ||
3377 | Lisp_Object | |
d3da34e0 | 3378 | unbind_to (int count, Lisp_Object value) |
db9f0278 | 3379 | { |
5a073f50 KS |
3380 | Lisp_Object quitf = Vquit_flag; |
3381 | struct gcpro gcpro1, gcpro2; | |
db9f0278 | 3382 | |
5a073f50 | 3383 | GCPRO2 (value, quitf); |
db9f0278 JB |
3384 | Vquit_flag = Qnil; |
3385 | ||
3386 | while (specpdl_ptr != specpdl + count) | |
3387 | { | |
611a8f8c RS |
3388 | /* Copy the binding, and decrement specpdl_ptr, before we do |
3389 | the work to unbind it. We decrement first | |
3390 | so that an error in unbinding won't try to unbind | |
3391 | the same entry again, and we copy the binding first | |
3392 | in case more bindings are made during some of the code we run. */ | |
eb700b82 | 3393 | |
45f266dc DL |
3394 | struct specbinding this_binding; |
3395 | this_binding = *--specpdl_ptr; | |
611a8f8c RS |
3396 | |
3397 | if (this_binding.func != 0) | |
3398 | (*this_binding.func) (this_binding.old_value); | |
0967b4b0 GM |
3399 | /* If the symbol is a list, it is really (SYMBOL WHERE |
3400 | . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a | |
3401 | frame. If WHERE is a buffer or frame, this indicates we | |
1b1acc13 PJ |
3402 | bound a variable that had a buffer-local or frame-local |
3403 | binding. WHERE nil means that the variable had the default | |
0967b4b0 | 3404 | value when it was bound. CURRENT-BUFFER is the buffer that |
bb8e180f | 3405 | was current when the variable was bound. */ |
611a8f8c | 3406 | else if (CONSP (this_binding.symbol)) |
719177b3 | 3407 | { |
eb700b82 | 3408 | Lisp_Object symbol, where; |
719177b3 | 3409 | |
611a8f8c RS |
3410 | symbol = XCAR (this_binding.symbol); |
3411 | where = XCAR (XCDR (this_binding.symbol)); | |
719177b3 | 3412 | |
eb700b82 | 3413 | if (NILP (where)) |
611a8f8c | 3414 | Fset_default (symbol, this_binding.old_value); |
94b612ad SM |
3415 | /* If `where' is non-nil, reset the value in the appropriate |
3416 | local binding, but only if that binding still exists. */ | |
4e2db1fe SM |
3417 | else if (BUFFERP (where) |
3418 | ? !NILP (Flocal_variable_p (symbol, where)) | |
3419 | : !NILP (Fassq (symbol, XFRAME (where)->param_alist))) | |
3420 | set_internal (symbol, this_binding.old_value, where, 1); | |
719177b3 | 3421 | } |
94b612ad SM |
3422 | /* If variable has a trivial value (no forwarding), we can |
3423 | just set it. No need to check for constant symbols here, | |
3424 | since that was already done by specbind. */ | |
3425 | else if (XSYMBOL (this_binding.symbol)->redirect == SYMBOL_PLAINVAL) | |
3426 | SET_SYMBOL_VAL (XSYMBOL (this_binding.symbol), | |
3427 | this_binding.old_value); | |
db9f0278 | 3428 | else |
94b612ad SM |
3429 | /* NOTE: we only ever come here if make_local_foo was used for |
3430 | the first time on this var within this let. */ | |
3431 | Fset_default (this_binding.symbol, this_binding.old_value); | |
db9f0278 | 3432 | } |
177c0ea7 | 3433 | |
5a073f50 KS |
3434 | if (NILP (Vquit_flag) && !NILP (quitf)) |
3435 | Vquit_flag = quitf; | |
db9f0278 JB |
3436 | |
3437 | UNGCPRO; | |
db9f0278 JB |
3438 | return value; |
3439 | } | |
b9598260 | 3440 | |
4a330052 | 3441 | DEFUN ("special-variable-p", Fspecial_variable_p, Sspecial_variable_p, 1, 1, 0, |
b9598260 SM |
3442 | doc: /* Return non-nil if SYMBOL's global binding has been declared special. |
3443 | A special variable is one that will be bound dynamically, even in a | |
3444 | context where binding is lexical by default. */) | |
c566235d | 3445 | (Lisp_Object symbol) |
b9598260 SM |
3446 | { |
3447 | CHECK_SYMBOL (symbol); | |
3448 | return XSYMBOL (symbol)->declared_special ? Qt : Qnil; | |
3449 | } | |
3450 | ||
db9f0278 | 3451 | \f |
db9f0278 | 3452 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, |
9dbc9081 PJ |
3453 | doc: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. |
3454 | The debugger is entered when that frame exits, if the flag is non-nil. */) | |
5842a27b | 3455 | (Lisp_Object level, Lisp_Object flag) |
db9f0278 JB |
3456 | { |
3457 | register struct backtrace *backlist = backtrace_list; | |
3458 | register int i; | |
3459 | ||
b7826503 | 3460 | CHECK_NUMBER (level); |
db9f0278 JB |
3461 | |
3462 | for (i = 0; backlist && i < XINT (level); i++) | |
3463 | { | |
3464 | backlist = backlist->next; | |
3465 | } | |
3466 | ||
3467 | if (backlist) | |
265a9e55 | 3468 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
3469 | |
3470 | return flag; | |
3471 | } | |
3472 | ||
3473 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
9dbc9081 PJ |
3474 | doc: /* Print a trace of Lisp function calls currently active. |
3475 | Output stream used is value of `standard-output'. */) | |
5842a27b | 3476 | (void) |
db9f0278 JB |
3477 | { |
3478 | register struct backtrace *backlist = backtrace_list; | |
db9f0278 JB |
3479 | Lisp_Object tail; |
3480 | Lisp_Object tem; | |
db9f0278 | 3481 | struct gcpro gcpro1; |
d4b6d95d | 3482 | Lisp_Object old_print_level = Vprint_level; |
db9f0278 | 3483 | |
d4b6d95d LMI |
3484 | if (NILP (Vprint_level)) |
3485 | XSETFASTINT (Vprint_level, 8); | |
db9f0278 JB |
3486 | |
3487 | tail = Qnil; | |
3488 | GCPRO1 (tail); | |
3489 | ||
3490 | while (backlist) | |
3491 | { | |
3492 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
44f230aa | 3493 | if (backlist->nargs == UNEVALLED) |
db9f0278 JB |
3494 | { |
3495 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 3496 | write_string ("\n", -1); |
db9f0278 JB |
3497 | } |
3498 | else | |
3499 | { | |
3500 | tem = *backlist->function; | |
f6d62986 | 3501 | Fprin1 (tem, Qnil); /* This can QUIT. */ |
db9f0278 | 3502 | write_string ("(", -1); |
44f230aa SM |
3503 | if (backlist->nargs == MANY) |
3504 | { /* FIXME: Can this happen? */ | |
a3eed478 | 3505 | int i; |
db9f0278 | 3506 | for (tail = *backlist->args, i = 0; |
265a9e55 | 3507 | !NILP (tail); |
a3eed478 | 3508 | tail = Fcdr (tail), i = 1) |
db9f0278 JB |
3509 | { |
3510 | if (i) write_string (" ", -1); | |
3511 | Fprin1 (Fcar (tail), Qnil); | |
3512 | } | |
3513 | } | |
3514 | else | |
3515 | { | |
f66c7cf8 | 3516 | ptrdiff_t i; |
db9f0278 JB |
3517 | for (i = 0; i < backlist->nargs; i++) |
3518 | { | |
3519 | if (i) write_string (" ", -1); | |
3520 | Fprin1 (backlist->args[i], Qnil); | |
3521 | } | |
3522 | } | |
b6703b02 | 3523 | write_string (")\n", -1); |
db9f0278 | 3524 | } |
db9f0278 JB |
3525 | backlist = backlist->next; |
3526 | } | |
3527 | ||
d4b6d95d | 3528 | Vprint_level = old_print_level; |
db9f0278 JB |
3529 | UNGCPRO; |
3530 | return Qnil; | |
3531 | } | |
3532 | ||
17401c97 | 3533 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
9dbc9081 PJ |
3534 | doc: /* Return the function and arguments NFRAMES up from current execution point. |
3535 | If that frame has not evaluated the arguments yet (or is a special form), | |
3536 | the value is (nil FUNCTION ARG-FORMS...). | |
3537 | If that frame has evaluated its arguments and called its function already, | |
3538 | the value is (t FUNCTION ARG-VALUES...). | |
3539 | A &rest arg is represented as the tail of the list ARG-VALUES. | |
3540 | FUNCTION is whatever was supplied as car of evaluated list, | |
3541 | or a lambda expression for macro calls. | |
3542 | If NFRAMES is more than the number of frames, the value is nil. */) | |
5842a27b | 3543 | (Lisp_Object nframes) |
db9f0278 JB |
3544 | { |
3545 | register struct backtrace *backlist = backtrace_list; | |
5d5d959d | 3546 | register EMACS_INT i; |
db9f0278 JB |
3547 | Lisp_Object tem; |
3548 | ||
b7826503 | 3549 | CHECK_NATNUM (nframes); |
db9f0278 JB |
3550 | |
3551 | /* Find the frame requested. */ | |
b6703b02 | 3552 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
3553 | backlist = backlist->next; |
3554 | ||
3555 | if (!backlist) | |
3556 | return Qnil; | |
44f230aa | 3557 | if (backlist->nargs == UNEVALLED) |
db9f0278 JB |
3558 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); |
3559 | else | |
3560 | { | |
44f230aa | 3561 | if (backlist->nargs == MANY) /* FIXME: Can this happen? */ |
db9f0278 JB |
3562 | tem = *backlist->args; |
3563 | else | |
3564 | tem = Flist (backlist->nargs, backlist->args); | |
3565 | ||
3566 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3567 | } | |
3568 | } | |
a2ff3819 | 3569 | |
db9f0278 | 3570 | \f |
244ed907 | 3571 | #if BYTE_MARK_STACK |
4ce0541e | 3572 | void |
d3da34e0 | 3573 | mark_backtrace (void) |
4ce0541e SM |
3574 | { |
3575 | register struct backtrace *backlist; | |
f66c7cf8 | 3576 | ptrdiff_t i; |
4ce0541e SM |
3577 | |
3578 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
3579 | { | |
3580 | mark_object (*backlist->function); | |
3581 | ||
44f230aa SM |
3582 | if (backlist->nargs == UNEVALLED |
3583 | || backlist->nargs == MANY) /* FIXME: Can this happen? */ | |
c5101a77 | 3584 | i = 1; |
4ce0541e | 3585 | else |
c5101a77 PE |
3586 | i = backlist->nargs; |
3587 | while (i--) | |
4ce0541e SM |
3588 | mark_object (backlist->args[i]); |
3589 | } | |
3590 | } | |
244ed907 | 3591 | #endif |
4ce0541e | 3592 | |
dfcf069d | 3593 | void |
d3da34e0 | 3594 | syms_of_eval (void) |
db9f0278 | 3595 | { |
29208e82 | 3596 | DEFVAR_INT ("max-specpdl-size", max_specpdl_size, |
82fc29a1 | 3597 | doc: /* *Limit on number of Lisp variable bindings and `unwind-protect's. |
9f5903bb | 3598 | If Lisp code tries to increase the total number past this amount, |
2520dc0c RS |
3599 | an error is signaled. |
3600 | You can safely use a value considerably larger than the default value, | |
3601 | if that proves inconveniently small. However, if you increase it too far, | |
3602 | Emacs could run out of memory trying to make the stack bigger. */); | |
db9f0278 | 3603 | |
29208e82 | 3604 | DEFVAR_INT ("max-lisp-eval-depth", max_lisp_eval_depth, |
9dbc9081 | 3605 | doc: /* *Limit on depth in `eval', `apply' and `funcall' before error. |
2520dc0c RS |
3606 | |
3607 | This limit serves to catch infinite recursions for you before they cause | |
9dbc9081 PJ |
3608 | actual stack overflow in C, which would be fatal for Emacs. |
3609 | You can safely make it considerably larger than its default value, | |
2520dc0c RS |
3610 | if that proves inconveniently small. However, if you increase it too far, |
3611 | Emacs could overflow the real C stack, and crash. */); | |
db9f0278 | 3612 | |
29208e82 | 3613 | DEFVAR_LISP ("quit-flag", Vquit_flag, |
9dbc9081 | 3614 | doc: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil. |
42ed718e RS |
3615 | If the value is t, that means do an ordinary quit. |
3616 | If the value equals `throw-on-input', that means quit by throwing | |
3617 | to the tag specified in `throw-on-input'; it's for handling `while-no-input'. | |
3618 | Typing C-g sets `quit-flag' to t, regardless of `inhibit-quit', | |
3619 | but `inhibit-quit' non-nil prevents anything from taking notice of that. */); | |
db9f0278 JB |
3620 | Vquit_flag = Qnil; |
3621 | ||
29208e82 | 3622 | DEFVAR_LISP ("inhibit-quit", Vinhibit_quit, |
9dbc9081 PJ |
3623 | doc: /* Non-nil inhibits C-g quitting from happening immediately. |
3624 | Note that `quit-flag' will still be set by typing C-g, | |
3625 | so a quit will be signaled as soon as `inhibit-quit' is nil. | |
3626 | To prevent this happening, set `quit-flag' to nil | |
3627 | before making `inhibit-quit' nil. */); | |
db9f0278 JB |
3628 | Vinhibit_quit = Qnil; |
3629 | ||
cd3520a4 JB |
3630 | DEFSYM (Qinhibit_quit, "inhibit-quit"); |
3631 | DEFSYM (Qautoload, "autoload"); | |
3632 | DEFSYM (Qdebug_on_error, "debug-on-error"); | |
3633 | DEFSYM (Qmacro, "macro"); | |
3634 | DEFSYM (Qdeclare, "declare"); | |
177c0ea7 | 3635 | |
db9f0278 JB |
3636 | /* Note that the process handling also uses Qexit, but we don't want |
3637 | to staticpro it twice, so we just do it here. */ | |
cd3520a4 | 3638 | DEFSYM (Qexit, "exit"); |
b9598260 | 3639 | |
cd3520a4 JB |
3640 | DEFSYM (Qinteractive, "interactive"); |
3641 | DEFSYM (Qcommandp, "commandp"); | |
3642 | DEFSYM (Qdefun, "defun"); | |
3643 | DEFSYM (Qand_rest, "&rest"); | |
3644 | DEFSYM (Qand_optional, "&optional"); | |
3645 | DEFSYM (Qclosure, "closure"); | |
3646 | DEFSYM (Qdebug, "debug"); | |
f01cbfdd | 3647 | |
29208e82 | 3648 | DEFVAR_LISP ("debug-on-error", Vdebug_on_error, |
9dbc9081 PJ |
3649 | doc: /* *Non-nil means enter debugger if an error is signaled. |
3650 | Does not apply to errors handled by `condition-case' or those | |
3651 | matched by `debug-ignored-errors'. | |
3652 | If the value is a list, an error only means to enter the debugger | |
3653 | if one of its condition symbols appears in the list. | |
3654 | When you evaluate an expression interactively, this variable | |
3655 | is temporarily non-nil if `eval-expression-debug-on-error' is non-nil. | |
fbbdcf2f CY |
3656 | The command `toggle-debug-on-error' toggles this. |
3657 | See also the variable `debug-on-quit'. */); | |
128c0f66 | 3658 | Vdebug_on_error = Qnil; |
db9f0278 | 3659 | |
29208e82 | 3660 | DEFVAR_LISP ("debug-ignored-errors", Vdebug_ignored_errors, |
9dbc9081 PJ |
3661 | doc: /* *List of errors for which the debugger should not be called. |
3662 | Each element may be a condition-name or a regexp that matches error messages. | |
3663 | If any element applies to a given error, that error skips the debugger | |
3664 | and just returns to top level. | |
3665 | This overrides the variable `debug-on-error'. | |
3666 | It does not apply to errors handled by `condition-case'. */); | |
fc950e09 KH |
3667 | Vdebug_ignored_errors = Qnil; |
3668 | ||
29208e82 | 3669 | DEFVAR_BOOL ("debug-on-quit", debug_on_quit, |
82fc29a1 JB |
3670 | doc: /* *Non-nil means enter debugger if quit is signaled (C-g, for example). |
3671 | Does not apply if quit is handled by a `condition-case'. */); | |
db9f0278 JB |
3672 | debug_on_quit = 0; |
3673 | ||
29208e82 | 3674 | DEFVAR_BOOL ("debug-on-next-call", debug_on_next_call, |
9dbc9081 | 3675 | doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */); |
db9f0278 | 3676 | |
29208e82 | 3677 | DEFVAR_BOOL ("debugger-may-continue", debugger_may_continue, |
9dbc9081 PJ |
3678 | doc: /* Non-nil means debugger may continue execution. |
3679 | This is nil when the debugger is called under circumstances where it | |
3680 | might not be safe to continue. */); | |
dac204bc | 3681 | debugger_may_continue = 1; |
556d7314 | 3682 | |
29208e82 | 3683 | DEFVAR_LISP ("debugger", Vdebugger, |
9dbc9081 PJ |
3684 | doc: /* Function to call to invoke debugger. |
3685 | If due to frame exit, args are `exit' and the value being returned; | |
3686 | this function's value will be returned instead of that. | |
3687 | If due to error, args are `error' and a list of the args to `signal'. | |
3688 | If due to `apply' or `funcall' entry, one arg, `lambda'. | |
3689 | If due to `eval' entry, one arg, t. */); | |
db9f0278 JB |
3690 | Vdebugger = Qnil; |
3691 | ||
29208e82 | 3692 | DEFVAR_LISP ("signal-hook-function", Vsignal_hook_function, |
9dbc9081 PJ |
3693 | doc: /* If non-nil, this is a function for `signal' to call. |
3694 | It receives the same arguments that `signal' was given. | |
3695 | The Edebug package uses this to regain control. */); | |
61ede770 RS |
3696 | Vsignal_hook_function = Qnil; |
3697 | ||
29208e82 | 3698 | DEFVAR_LISP ("debug-on-signal", Vdebug_on_signal, |
9dbc9081 PJ |
3699 | doc: /* *Non-nil means call the debugger regardless of condition handlers. |
3700 | Note that `debug-on-error', `debug-on-quit' and friends | |
3701 | still determine whether to handle the particular condition. */); | |
57a6e758 | 3702 | Vdebug_on_signal = Qnil; |
61ede770 | 3703 | |
29208e82 | 3704 | DEFVAR_LISP ("macro-declaration-function", Vmacro_declaration_function, |
d6edd563 GM |
3705 | doc: /* Function to process declarations in a macro definition. |
3706 | The function will be called with two args MACRO and DECL. | |
3707 | MACRO is the name of the macro being defined. | |
3708 | DECL is a list `(declare ...)' containing the declarations. | |
3709 | The value the function returns is not used. */); | |
3710 | Vmacro_declaration_function = Qnil; | |
3711 | ||
b38b1ec0 SM |
3712 | /* When lexical binding is being used, |
3713 | vinternal_interpreter_environment is non-nil, and contains an alist | |
3714 | of lexically-bound variable, or (t), indicating an empty | |
3715 | environment. The lisp name of this variable would be | |
3716 | `internal-interpreter-environment' if it weren't hidden. | |
3717 | Every element of this list can be either a cons (VAR . VAL) | |
3718 | specifying a lexical binding, or a single symbol VAR indicating | |
3719 | that this variable should use dynamic scoping. */ | |
cd3520a4 | 3720 | DEFSYM (Qinternal_interpreter_environment, "internal-interpreter-environment"); |
b38b1ec0 SM |
3721 | DEFVAR_LISP ("internal-interpreter-environment", |
3722 | Vinternal_interpreter_environment, | |
b9598260 SM |
3723 | doc: /* If non-nil, the current lexical environment of the lisp interpreter. |
3724 | When lexical binding is not being used, this variable is nil. | |
3725 | A value of `(t)' indicates an empty environment, otherwise it is an | |
3726 | alist of active lexical bindings. */); | |
3727 | Vinternal_interpreter_environment = Qnil; | |
b38b1ec0 SM |
3728 | /* Don't export this variable to Elisp, so noone can mess with it |
3729 | (Just imagine if someone makes it buffer-local). */ | |
3730 | Funintern (Qinternal_interpreter_environment, Qnil); | |
b9598260 | 3731 | |
cd3520a4 | 3732 | DEFSYM (Vrun_hooks, "run-hooks"); |
db9f0278 JB |
3733 | |
3734 | staticpro (&Vautoload_queue); | |
3735 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3736 | staticpro (&Vsignaling_function); |
3737 | Vsignaling_function = Qnil; | |
db9f0278 JB |
3738 | |
3739 | defsubr (&Sor); | |
3740 | defsubr (&Sand); | |
3741 | defsubr (&Sif); | |
3742 | defsubr (&Scond); | |
3743 | defsubr (&Sprogn); | |
3744 | defsubr (&Sprog1); | |
3745 | defsubr (&Sprog2); | |
3746 | defsubr (&Ssetq); | |
3747 | defsubr (&Squote); | |
3748 | defsubr (&Sfunction); | |
3749 | defsubr (&Sdefun); | |
3750 | defsubr (&Sdefmacro); | |
3751 | defsubr (&Sdefvar); | |
19cebf5a | 3752 | defsubr (&Sdefvaralias); |
db9f0278 JB |
3753 | defsubr (&Sdefconst); |
3754 | defsubr (&Suser_variable_p); | |
3755 | defsubr (&Slet); | |
3756 | defsubr (&SletX); | |
3757 | defsubr (&Swhile); | |
3758 | defsubr (&Smacroexpand); | |
3759 | defsubr (&Scatch); | |
3760 | defsubr (&Sthrow); | |
3761 | defsubr (&Sunwind_protect); | |
3762 | defsubr (&Scondition_case); | |
3763 | defsubr (&Ssignal); | |
3764 | defsubr (&Sinteractive_p); | |
4b664e76 | 3765 | defsubr (&Scalled_interactively_p); |
db9f0278 JB |
3766 | defsubr (&Scommandp); |
3767 | defsubr (&Sautoload); | |
3768 | defsubr (&Seval); | |
3769 | defsubr (&Sapply); | |
3770 | defsubr (&Sfuncall); | |
ff936e53 SM |
3771 | defsubr (&Srun_hooks); |
3772 | defsubr (&Srun_hook_with_args); | |
3773 | defsubr (&Srun_hook_with_args_until_success); | |
3774 | defsubr (&Srun_hook_with_args_until_failure); | |
f6d62986 | 3775 | defsubr (&Srun_hook_wrapped); |
661c7d6e | 3776 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3777 | defsubr (&Sbacktrace_debug); |
3778 | defsubr (&Sbacktrace); | |
3779 | defsubr (&Sbacktrace_frame); | |
4a330052 | 3780 | defsubr (&Sspecial_variable_p); |
b9598260 | 3781 | defsubr (&Sfunctionp); |
db9f0278 | 3782 | } |