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db9f0278 | 1 | /* Evaluator for GNU Emacs Lisp interpreter. |
f4cfd81a | 2 | Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1999, 2000, 2001, |
4e6835db | 3 | 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
db9f0278 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
96277b2d | 9 | the Free Software Foundation; either version 2, or (at your option) |
db9f0278 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
db9f0278 JB |
21 | |
22 | ||
18160b98 | 23 | #include <config.h> |
db9f0278 | 24 | #include "lisp.h" |
9ac0d9e0 | 25 | #include "blockinput.h" |
db9f0278 | 26 | #include "commands.h" |
1f98fa48 | 27 | #include "keyboard.h" |
3648c842 | 28 | #include "dispextern.h" |
db9f0278 JB |
29 | #include <setjmp.h> |
30 | ||
b70e1a2b SM |
31 | #if HAVE_X_WINDOWS |
32 | #include "xterm.h" | |
33 | #endif | |
34 | ||
db9f0278 JB |
35 | /* This definition is duplicated in alloc.c and keyboard.c */ |
36 | /* Putting it in lisp.h makes cc bomb out! */ | |
37 | ||
38 | struct backtrace | |
4c576a83 GM |
39 | { |
40 | struct backtrace *next; | |
41 | Lisp_Object *function; | |
42 | Lisp_Object *args; /* Points to vector of args. */ | |
43 | int nargs; /* Length of vector. | |
daa37602 JB |
44 | If nargs is UNEVALLED, args points to slot holding |
45 | list of unevalled args */ | |
4c576a83 GM |
46 | char evalargs; |
47 | /* Nonzero means call value of debugger when done with this operation. */ | |
48 | char debug_on_exit; | |
49 | }; | |
db9f0278 JB |
50 | |
51 | struct backtrace *backtrace_list; | |
52 | ||
82da7701 JB |
53 | /* This structure helps implement the `catch' and `throw' control |
54 | structure. A struct catchtag contains all the information needed | |
55 | to restore the state of the interpreter after a non-local jump. | |
56 | ||
57 | Handlers for error conditions (represented by `struct handler' | |
58 | structures) just point to a catch tag to do the cleanup required | |
59 | for their jumps. | |
60 | ||
61 | catchtag structures are chained together in the C calling stack; | |
62 | the `next' member points to the next outer catchtag. | |
63 | ||
64 | A call like (throw TAG VAL) searches for a catchtag whose `tag' | |
65 | member is TAG, and then unbinds to it. The `val' member is used to | |
66 | hold VAL while the stack is unwound; `val' is returned as the value | |
67 | of the catch form. | |
68 | ||
69 | All the other members are concerned with restoring the interpreter | |
70 | state. */ | |
4c576a83 | 71 | |
db9f0278 | 72 | struct catchtag |
4c576a83 GM |
73 | { |
74 | Lisp_Object tag; | |
75 | Lisp_Object val; | |
76 | struct catchtag *next; | |
77 | struct gcpro *gcpro; | |
78 | jmp_buf jmp; | |
79 | struct backtrace *backlist; | |
80 | struct handler *handlerlist; | |
81 | int lisp_eval_depth; | |
82 | int pdlcount; | |
83 | int poll_suppress_count; | |
2659a09f | 84 | int interrupt_input_blocked; |
4c576a83 GM |
85 | struct byte_stack *byte_stack; |
86 | }; | |
db9f0278 JB |
87 | |
88 | struct catchtag *catchlist; | |
89 | ||
15934ffa RS |
90 | #ifdef DEBUG_GCPRO |
91 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
92 | int gcpro_level; | |
93 | #endif | |
94 | ||
6fd797f5 | 95 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp, Qdefun; |
ad236261 | 96 | Lisp_Object Qinhibit_quit, Vinhibit_quit, Vquit_flag; |
db9f0278 JB |
97 | Lisp_Object Qand_rest, Qand_optional; |
98 | Lisp_Object Qdebug_on_error; | |
d6edd563 | 99 | Lisp_Object Qdeclare; |
db9f0278 | 100 | |
6e6e9f08 RS |
101 | /* This holds either the symbol `run-hooks' or nil. |
102 | It is nil at an early stage of startup, and when Emacs | |
103 | is shutting down. */ | |
4c576a83 | 104 | |
db9f0278 JB |
105 | Lisp_Object Vrun_hooks; |
106 | ||
107 | /* Non-nil means record all fset's and provide's, to be undone | |
108 | if the file being autoloaded is not fully loaded. | |
109 | They are recorded by being consed onto the front of Vautoload_queue: | |
47b82df9 | 110 | (FUN . ODEF) for a defun, (0 . OFEATURES) for a provide. */ |
db9f0278 JB |
111 | |
112 | Lisp_Object Vautoload_queue; | |
113 | ||
114 | /* Current number of specbindings allocated in specpdl. */ | |
4c576a83 | 115 | |
db9f0278 JB |
116 | int specpdl_size; |
117 | ||
118 | /* Pointer to beginning of specpdl. */ | |
4c576a83 | 119 | |
db9f0278 JB |
120 | struct specbinding *specpdl; |
121 | ||
122 | /* Pointer to first unused element in specpdl. */ | |
4c576a83 | 123 | |
ab837828 | 124 | struct specbinding *specpdl_ptr; |
db9f0278 JB |
125 | |
126 | /* Maximum size allowed for specpdl allocation */ | |
4c576a83 | 127 | |
31ade731 | 128 | EMACS_INT max_specpdl_size; |
db9f0278 JB |
129 | |
130 | /* Depth in Lisp evaluations and function calls. */ | |
4c576a83 | 131 | |
db9f0278 JB |
132 | int lisp_eval_depth; |
133 | ||
134 | /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
4c576a83 | 135 | |
31ade731 | 136 | EMACS_INT max_lisp_eval_depth; |
db9f0278 JB |
137 | |
138 | /* Nonzero means enter debugger before next function call */ | |
4c576a83 | 139 | |
db9f0278 JB |
140 | int debug_on_next_call; |
141 | ||
1b1acc13 | 142 | /* Non-zero means debugger may continue. This is zero when the |
556d7314 GM |
143 | debugger is called during redisplay, where it might not be safe to |
144 | continue the interrupted redisplay. */ | |
145 | ||
146 | int debugger_may_continue; | |
147 | ||
128c0f66 | 148 | /* List of conditions (non-nil atom means all) which cause a backtrace |
4de86b16 | 149 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 150 | |
128c0f66 | 151 | Lisp_Object Vstack_trace_on_error; |
db9f0278 | 152 | |
128c0f66 | 153 | /* List of conditions (non-nil atom means all) which enter the debugger |
4de86b16 | 154 | if an error is handled by the command loop's error handler. */ |
4c576a83 | 155 | |
128c0f66 | 156 | Lisp_Object Vdebug_on_error; |
db9f0278 | 157 | |
fc950e09 | 158 | /* List of conditions and regexps specifying error messages which |
1b1acc13 | 159 | do not enter the debugger even if Vdebug_on_error says they should. */ |
4c576a83 | 160 | |
fc950e09 KH |
161 | Lisp_Object Vdebug_ignored_errors; |
162 | ||
61ede770 | 163 | /* Non-nil means call the debugger even if the error will be handled. */ |
4c576a83 | 164 | |
57a6e758 | 165 | Lisp_Object Vdebug_on_signal; |
61ede770 RS |
166 | |
167 | /* Hook for edebug to use. */ | |
4c576a83 | 168 | |
61ede770 RS |
169 | Lisp_Object Vsignal_hook_function; |
170 | ||
db9f0278 | 171 | /* Nonzero means enter debugger if a quit signal |
128c0f66 | 172 | is handled by the command loop's error handler. */ |
4c576a83 | 173 | |
db9f0278 JB |
174 | int debug_on_quit; |
175 | ||
be857679 | 176 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 177 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 178 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
179 | know that the debugger itself has an error, and we should just |
180 | signal the error instead of entering an infinite loop of debugger | |
181 | invocations. */ | |
4c576a83 | 182 | |
82da7701 | 183 | int when_entered_debugger; |
db9f0278 JB |
184 | |
185 | Lisp_Object Vdebugger; | |
186 | ||
a2ff3819 GM |
187 | /* The function from which the last `signal' was called. Set in |
188 | Fsignal. */ | |
189 | ||
190 | Lisp_Object Vsignaling_function; | |
191 | ||
4c576a83 GM |
192 | /* Set to non-zero while processing X events. Checked in Feval to |
193 | make sure the Lisp interpreter isn't called from a signal handler, | |
194 | which is unsafe because the interpreter isn't reentrant. */ | |
195 | ||
196 | int handling_signal; | |
197 | ||
d6edd563 GM |
198 | /* Function to process declarations in defmacro forms. */ |
199 | ||
200 | Lisp_Object Vmacro_declaration_function; | |
201 | ||
873759d5 | 202 | extern Lisp_Object Qrisky_local_variable; |
d6edd563 | 203 | |
2901f1d1 | 204 | static Lisp_Object funcall_lambda P_ ((Lisp_Object, int, Lisp_Object*)); |
2381d38d | 205 | static void unwind_to_catch P_ ((struct catchtag *, Lisp_Object)) NO_RETURN; |
eaa1e5ed EZ |
206 | |
207 | #if __GNUC__ | |
208 | /* "gcc -O3" enables automatic function inlining, which optimizes out | |
209 | the arguments for the invocations of these functions, whereas they | |
210 | expect these values on the stack. */ | |
211 | Lisp_Object apply1 () __attribute__((noinline)); | |
212 | Lisp_Object call2 () __attribute__((noinline)); | |
213 | #endif | |
873759d5 | 214 | \f |
dfcf069d | 215 | void |
db9f0278 JB |
216 | init_eval_once () |
217 | { | |
218 | specpdl_size = 50; | |
716acfce | 219 | specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding)); |
270e8074 | 220 | specpdl_ptr = specpdl; |
6588243d | 221 | /* Don't forget to update docs (lispref node "Local Variables"). */ |
a4547405 | 222 | max_specpdl_size = 1000; |
be436d23 | 223 | max_lisp_eval_depth = 400; |
34d470ba RS |
224 | |
225 | Vrun_hooks = Qnil; | |
db9f0278 JB |
226 | } |
227 | ||
dfcf069d | 228 | void |
db9f0278 JB |
229 | init_eval () |
230 | { | |
231 | specpdl_ptr = specpdl; | |
232 | catchlist = 0; | |
233 | handlerlist = 0; | |
234 | backtrace_list = 0; | |
235 | Vquit_flag = Qnil; | |
236 | debug_on_next_call = 0; | |
237 | lisp_eval_depth = 0; | |
87e21fbd | 238 | #ifdef DEBUG_GCPRO |
15934ffa | 239 | gcpro_level = 0; |
87e21fbd | 240 | #endif |
be857679 | 241 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 242 | when_entered_debugger = -1; |
db9f0278 JB |
243 | } |
244 | ||
9f5903bb RS |
245 | /* unwind-protect function used by call_debugger. */ |
246 | ||
247 | static Lisp_Object | |
248 | restore_stack_limits (data) | |
249 | Lisp_Object data; | |
250 | { | |
251 | max_specpdl_size = XINT (XCAR (data)); | |
252 | max_lisp_eval_depth = XINT (XCDR (data)); | |
538f78c3 | 253 | return Qnil; |
9f5903bb RS |
254 | } |
255 | ||
256 | /* Call the Lisp debugger, giving it argument ARG. */ | |
257 | ||
db9f0278 JB |
258 | Lisp_Object |
259 | call_debugger (arg) | |
260 | Lisp_Object arg; | |
261 | { | |
3648c842 | 262 | int debug_while_redisplaying; |
aed13378 | 263 | int count = SPECPDL_INDEX (); |
3648c842 | 264 | Lisp_Object val; |
9f5903bb | 265 | int old_max = max_specpdl_size; |
177c0ea7 | 266 | |
9f5903bb RS |
267 | /* Temporarily bump up the stack limits, |
268 | so the debugger won't run out of stack. */ | |
177c0ea7 | 269 | |
9f5903bb RS |
270 | max_specpdl_size += 1; |
271 | record_unwind_protect (restore_stack_limits, | |
272 | Fcons (make_number (old_max), | |
273 | make_number (max_lisp_eval_depth))); | |
274 | max_specpdl_size = old_max; | |
275 | ||
276 | if (lisp_eval_depth + 40 > max_lisp_eval_depth) | |
277 | max_lisp_eval_depth = lisp_eval_depth + 40; | |
278 | ||
279 | if (SPECPDL_INDEX () + 100 > max_specpdl_size) | |
280 | max_specpdl_size = SPECPDL_INDEX () + 100; | |
177c0ea7 | 281 | |
237c23b0 | 282 | #ifdef HAVE_X_WINDOWS |
df6c90d8 GM |
283 | if (display_hourglass_p) |
284 | cancel_hourglass (); | |
237c23b0 GM |
285 | #endif |
286 | ||
db9f0278 | 287 | debug_on_next_call = 0; |
be857679 | 288 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
289 | |
290 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
291 | displayed if the debugger is invoked during redisplay. */ | |
292 | debug_while_redisplaying = redisplaying_p; | |
293 | redisplaying_p = 0; | |
556d7314 GM |
294 | specbind (intern ("debugger-may-continue"), |
295 | debug_while_redisplaying ? Qnil : Qt); | |
8efb6cc7 | 296 | specbind (Qinhibit_redisplay, Qnil); |
9f5903bb | 297 | specbind (Qdebug_on_error, Qnil); |
9db6f6b4 GM |
298 | |
299 | #if 0 /* Binding this prevents execution of Lisp code during | |
300 | redisplay, which necessarily leads to display problems. */ | |
8efb6cc7 | 301 | specbind (Qinhibit_eval_during_redisplay, Qt); |
9db6f6b4 | 302 | #endif |
177c0ea7 | 303 | |
3648c842 GM |
304 | val = apply1 (Vdebugger, arg); |
305 | ||
306 | /* Interrupting redisplay and resuming it later is not safe under | |
307 | all circumstances. So, when the debugger returns, abort the | |
1b1acc13 | 308 | interrupted redisplay by going back to the top-level. */ |
3648c842 GM |
309 | if (debug_while_redisplaying) |
310 | Ftop_level (); | |
311 | ||
556d7314 | 312 | return unbind_to (count, val); |
db9f0278 JB |
313 | } |
314 | ||
dfcf069d | 315 | void |
db9f0278 JB |
316 | do_debug_on_call (code) |
317 | Lisp_Object code; | |
318 | { | |
319 | debug_on_next_call = 0; | |
320 | backtrace_list->debug_on_exit = 1; | |
321 | call_debugger (Fcons (code, Qnil)); | |
322 | } | |
323 | \f | |
324 | /* NOTE!!! Every function that can call EVAL must protect its args | |
325 | and temporaries from garbage collection while it needs them. | |
326 | The definition of `For' shows what you have to do. */ | |
327 | ||
328 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
329 | doc: /* Eval args until one of them yields non-nil, then return that value. |
330 | The remaining args are not evalled at all. | |
331 | If all args return nil, return nil. | |
7a25dc6d | 332 | usage: (or CONDITIONS ...) */) |
9dbc9081 | 333 | (args) |
db9f0278 JB |
334 | Lisp_Object args; |
335 | { | |
e509f168 | 336 | register Lisp_Object val = Qnil; |
db9f0278 JB |
337 | struct gcpro gcpro1; |
338 | ||
e509f168 | 339 | GCPRO1 (args); |
db9f0278 | 340 | |
e509f168 | 341 | while (CONSP (args)) |
db9f0278 | 342 | { |
e509f168 | 343 | val = Feval (XCAR (args)); |
265a9e55 | 344 | if (!NILP (val)) |
db9f0278 | 345 | break; |
e509f168 | 346 | args = XCDR (args); |
db9f0278 | 347 | } |
db9f0278 JB |
348 | |
349 | UNGCPRO; | |
350 | return val; | |
351 | } | |
352 | ||
353 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
b8de5714 | 354 | doc: /* Eval args until one of them yields nil, then return nil. |
9dbc9081 PJ |
355 | The remaining args are not evalled at all. |
356 | If no arg yields nil, return the last arg's value. | |
7a25dc6d | 357 | usage: (and CONDITIONS ...) */) |
9dbc9081 | 358 | (args) |
db9f0278 JB |
359 | Lisp_Object args; |
360 | { | |
e509f168 | 361 | register Lisp_Object val = Qt; |
db9f0278 JB |
362 | struct gcpro gcpro1; |
363 | ||
e509f168 | 364 | GCPRO1 (args); |
db9f0278 | 365 | |
e509f168 | 366 | while (CONSP (args)) |
db9f0278 | 367 | { |
e509f168 | 368 | val = Feval (XCAR (args)); |
265a9e55 | 369 | if (NILP (val)) |
db9f0278 | 370 | break; |
e509f168 | 371 | args = XCDR (args); |
db9f0278 | 372 | } |
db9f0278 JB |
373 | |
374 | UNGCPRO; | |
375 | return val; | |
376 | } | |
377 | ||
378 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
b8de5714 | 379 | doc: /* If COND yields non-nil, do THEN, else do ELSE... |
9dbc9081 PJ |
380 | Returns the value of THEN or the value of the last of the ELSE's. |
381 | THEN must be one expression, but ELSE... can be zero or more expressions. | |
382 | If COND yields nil, and there are no ELSE's, the value is nil. | |
7a25dc6d | 383 | usage: (if COND THEN ELSE...) */) |
9dbc9081 | 384 | (args) |
db9f0278 JB |
385 | Lisp_Object args; |
386 | { | |
387 | register Lisp_Object cond; | |
388 | struct gcpro gcpro1; | |
389 | ||
390 | GCPRO1 (args); | |
391 | cond = Feval (Fcar (args)); | |
392 | UNGCPRO; | |
393 | ||
265a9e55 | 394 | if (!NILP (cond)) |
db9f0278 JB |
395 | return Feval (Fcar (Fcdr (args))); |
396 | return Fprogn (Fcdr (Fcdr (args))); | |
397 | } | |
398 | ||
399 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
400 | doc: /* Try each clause until one succeeds. |
401 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated | |
402 | and, if the value is non-nil, this clause succeeds: | |
403 | then the expressions in BODY are evaluated and the last one's | |
404 | value is the value of the cond-form. | |
405 | If no clause succeeds, cond returns nil. | |
406 | If a clause has one element, as in (CONDITION), | |
407 | CONDITION's value if non-nil is returned from the cond-form. | |
7a25dc6d | 408 | usage: (cond CLAUSES...) */) |
9dbc9081 | 409 | (args) |
db9f0278 JB |
410 | Lisp_Object args; |
411 | { | |
412 | register Lisp_Object clause, val; | |
413 | struct gcpro gcpro1; | |
414 | ||
415 | val = Qnil; | |
416 | GCPRO1 (args); | |
265a9e55 | 417 | while (!NILP (args)) |
db9f0278 JB |
418 | { |
419 | clause = Fcar (args); | |
420 | val = Feval (Fcar (clause)); | |
265a9e55 | 421 | if (!NILP (val)) |
db9f0278 | 422 | { |
03699b14 KR |
423 | if (!EQ (XCDR (clause), Qnil)) |
424 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
425 | break; |
426 | } | |
03699b14 | 427 | args = XCDR (args); |
db9f0278 JB |
428 | } |
429 | UNGCPRO; | |
430 | ||
431 | return val; | |
432 | } | |
433 | ||
434 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, | |
9dbc9081 | 435 | doc: /* Eval BODY forms sequentially and return value of last one. |
5b4a1f50 | 436 | usage: (progn BODY...) */) |
9dbc9081 | 437 | (args) |
db9f0278 JB |
438 | Lisp_Object args; |
439 | { | |
e509f168 | 440 | register Lisp_Object val = Qnil; |
db9f0278 JB |
441 | struct gcpro gcpro1; |
442 | ||
e509f168 | 443 | GCPRO1 (args); |
db9f0278 | 444 | |
e509f168 | 445 | while (CONSP (args)) |
db9f0278 | 446 | { |
e509f168 SM |
447 | val = Feval (XCAR (args)); |
448 | args = XCDR (args); | |
db9f0278 | 449 | } |
db9f0278 JB |
450 | |
451 | UNGCPRO; | |
452 | return val; | |
453 | } | |
454 | ||
455 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
456 | doc: /* Eval FIRST and BODY sequentially; value from FIRST. |
457 | The value of FIRST is saved during the evaluation of the remaining args, | |
458 | whose values are discarded. | |
7a25dc6d | 459 | usage: (prog1 FIRST BODY...) */) |
9dbc9081 | 460 | (args) |
db9f0278 JB |
461 | Lisp_Object args; |
462 | { | |
463 | Lisp_Object val; | |
464 | register Lisp_Object args_left; | |
465 | struct gcpro gcpro1, gcpro2; | |
466 | register int argnum = 0; | |
467 | ||
265a9e55 | 468 | if (NILP(args)) |
db9f0278 JB |
469 | return Qnil; |
470 | ||
471 | args_left = args; | |
472 | val = Qnil; | |
473 | GCPRO2 (args, val); | |
474 | ||
475 | do | |
476 | { | |
477 | if (!(argnum++)) | |
478 | val = Feval (Fcar (args_left)); | |
479 | else | |
480 | Feval (Fcar (args_left)); | |
481 | args_left = Fcdr (args_left); | |
482 | } | |
265a9e55 | 483 | while (!NILP(args_left)); |
db9f0278 JB |
484 | |
485 | UNGCPRO; | |
486 | return val; | |
487 | } | |
488 | ||
489 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
82fc29a1 JB |
490 | doc: /* Eval FORM1, FORM2 and BODY sequentially; value from FORM2. |
491 | The value of FORM2 is saved during the evaluation of the | |
492 | remaining args, whose values are discarded. | |
493 | usage: (prog2 FORM1 FORM2 BODY...) */) | |
9dbc9081 | 494 | (args) |
db9f0278 JB |
495 | Lisp_Object args; |
496 | { | |
497 | Lisp_Object val; | |
498 | register Lisp_Object args_left; | |
499 | struct gcpro gcpro1, gcpro2; | |
500 | register int argnum = -1; | |
501 | ||
502 | val = Qnil; | |
503 | ||
87d238ba | 504 | if (NILP (args)) |
db9f0278 JB |
505 | return Qnil; |
506 | ||
507 | args_left = args; | |
508 | val = Qnil; | |
509 | GCPRO2 (args, val); | |
510 | ||
511 | do | |
512 | { | |
513 | if (!(argnum++)) | |
514 | val = Feval (Fcar (args_left)); | |
515 | else | |
516 | Feval (Fcar (args_left)); | |
517 | args_left = Fcdr (args_left); | |
518 | } | |
87d238ba | 519 | while (!NILP (args_left)); |
db9f0278 JB |
520 | |
521 | UNGCPRO; | |
522 | return val; | |
523 | } | |
524 | ||
525 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
526 | doc: /* Set each SYM to the value of its VAL. |
527 | The symbols SYM are variables; they are literal (not evaluated). | |
528 | The values VAL are expressions; they are evaluated. | |
529 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
530 | The second VAL is not computed until after the first SYM is set, and so on; | |
531 | each VAL can use the new value of variables set earlier in the `setq'. | |
532 | The return value of the `setq' form is the value of the last VAL. | |
533 | usage: (setq SYM VAL SYM VAL ...) */) | |
534 | (args) | |
db9f0278 JB |
535 | Lisp_Object args; |
536 | { | |
537 | register Lisp_Object args_left; | |
538 | register Lisp_Object val, sym; | |
539 | struct gcpro gcpro1; | |
540 | ||
265a9e55 | 541 | if (NILP(args)) |
db9f0278 JB |
542 | return Qnil; |
543 | ||
544 | args_left = args; | |
545 | GCPRO1 (args); | |
546 | ||
547 | do | |
548 | { | |
549 | val = Feval (Fcar (Fcdr (args_left))); | |
550 | sym = Fcar (args_left); | |
551 | Fset (sym, val); | |
552 | args_left = Fcdr (Fcdr (args_left)); | |
553 | } | |
265a9e55 | 554 | while (!NILP(args_left)); |
db9f0278 JB |
555 | |
556 | UNGCPRO; | |
557 | return val; | |
558 | } | |
177c0ea7 | 559 | |
db9f0278 | 560 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, |
9dbc9081 PJ |
561 | doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'. |
562 | usage: (quote ARG) */) | |
563 | (args) | |
db9f0278 JB |
564 | Lisp_Object args; |
565 | { | |
566 | return Fcar (args); | |
567 | } | |
177c0ea7 | 568 | |
db9f0278 | 569 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, |
9dbc9081 PJ |
570 | doc: /* Like `quote', but preferred for objects which are functions. |
571 | In byte compilation, `function' causes its argument to be compiled. | |
572 | `quote' cannot do that. | |
573 | usage: (function ARG) */) | |
574 | (args) | |
db9f0278 JB |
575 | Lisp_Object args; |
576 | { | |
577 | return Fcar (args); | |
578 | } | |
579 | ||
e0f331ab | 580 | |
db9f0278 | 581 | DEFUN ("interactive-p", Finteractive_p, Sinteractive_p, 0, 0, 0, |
c63df42b | 582 | doc: /* Return t if the function was run directly by user input. |
82fc29a1 JB |
583 | This means that the function was called with `call-interactively' |
584 | \(which includes being called as the binding of a key) | |
c63df42b RS |
585 | and input is currently coming from the keyboard (not in keyboard macro), |
586 | and Emacs is not running in batch mode (`noninteractive' is nil). | |
587 | ||
588 | The only known proper use of `interactive-p' is in deciding whether to | |
589 | display a helpful message, or how to display it. If you're thinking | |
590 | of using it for any other purpose, it is quite likely that you're | |
591 | making a mistake. Think: what do you want to do when the command is | |
592 | called from a keyboard macro? | |
593 | ||
594 | If you want to test whether your function was called with | |
595 | `call-interactively', the way to do that is by adding an extra | |
596 | optional argument, and making the `interactive' spec specify non-nil | |
597 | unconditionally for that argument. (`p' is a good way to do this.) */) | |
9dbc9081 | 598 | () |
db9f0278 | 599 | { |
c63df42b | 600 | return (INTERACTIVE && interactive_p (1)) ? Qt : Qnil; |
e0f331ab GM |
601 | } |
602 | ||
603 | ||
4b664e76 | 604 | DEFUN ("called-interactively-p", Fcalled_interactively_p, Scalled_interactively_p, 0, 0, 0, |
82fc29a1 | 605 | doc: /* Return t if the function using this was called with `call-interactively'. |
c63df42b RS |
606 | This is used for implementing advice and other function-modifying |
607 | features of Emacs. | |
608 | ||
609 | The cleanest way to test whether your function was called with | |
82fc29a1 JB |
610 | `call-interactively' is by adding an extra optional argument, |
611 | and making the `interactive' spec specify non-nil unconditionally | |
612 | for that argument. (`p' is a good way to do this.) */) | |
c63df42b RS |
613 | () |
614 | { | |
0b31741c | 615 | return interactive_p (1) ? Qt : Qnil; |
c63df42b RS |
616 | } |
617 | ||
618 | ||
619 | /* Return 1 if function in which this appears was called using | |
620 | call-interactively. | |
e0f331ab GM |
621 | |
622 | EXCLUDE_SUBRS_P non-zero means always return 0 if the function | |
623 | called is a built-in. */ | |
624 | ||
625 | int | |
626 | interactive_p (exclude_subrs_p) | |
627 | int exclude_subrs_p; | |
628 | { | |
629 | struct backtrace *btp; | |
630 | Lisp_Object fun; | |
db9f0278 | 631 | |
db9f0278 | 632 | btp = backtrace_list; |
daa37602 JB |
633 | |
634 | /* If this isn't a byte-compiled function, there may be a frame at | |
e0f331ab | 635 | the top for Finteractive_p. If so, skip it. */ |
a7f96a35 | 636 | fun = Findirect_function (*btp->function, Qnil); |
0b31741c RS |
637 | if (SUBRP (fun) && (XSUBR (fun) == &Sinteractive_p |
638 | || XSUBR (fun) == &Scalled_interactively_p)) | |
db9f0278 | 639 | btp = btp->next; |
daa37602 JB |
640 | |
641 | /* If we're running an Emacs 18-style byte-compiled function, there | |
4402a9ed RS |
642 | may be a frame for Fbytecode at the top level. In any version of |
643 | Emacs there can be Fbytecode frames for subexpressions evaluated | |
644 | inside catch and condition-case. Skip past them. | |
daa37602 | 645 | |
4402a9ed | 646 | If this isn't a byte-compiled function, then we may now be |
daa37602 | 647 | looking at several frames for special forms. Skip past them. */ |
4402a9ed RS |
648 | while (btp |
649 | && (EQ (*btp->function, Qbytecode) | |
650 | || btp->nargs == UNEVALLED)) | |
a6e3fa71 JB |
651 | btp = btp->next; |
652 | ||
daa37602 JB |
653 | /* btp now points at the frame of the innermost function that isn't |
654 | a special form, ignoring frames for Finteractive_p and/or | |
655 | Fbytecode at the top. If this frame is for a built-in function | |
656 | (such as load or eval-region) return nil. */ | |
a7f96a35 | 657 | fun = Findirect_function (*btp->function, Qnil); |
e0f331ab GM |
658 | if (exclude_subrs_p && SUBRP (fun)) |
659 | return 0; | |
177c0ea7 | 660 | |
db9f0278 JB |
661 | /* btp points to the frame of a Lisp function that called interactive-p. |
662 | Return t if that function was called interactively. */ | |
663 | if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
e0f331ab GM |
664 | return 1; |
665 | return 0; | |
db9f0278 JB |
666 | } |
667 | ||
e0f331ab | 668 | |
db9f0278 | 669 | DEFUN ("defun", Fdefun, Sdefun, 2, UNEVALLED, 0, |
9dbc9081 PJ |
670 | doc: /* Define NAME as a function. |
671 | The definition is (lambda ARGLIST [DOCSTRING] BODY...). | |
672 | See also the function `interactive'. | |
7a25dc6d | 673 | usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */) |
9dbc9081 | 674 | (args) |
db9f0278 JB |
675 | Lisp_Object args; |
676 | { | |
677 | register Lisp_Object fn_name; | |
678 | register Lisp_Object defn; | |
679 | ||
680 | fn_name = Fcar (args); | |
6992a868 | 681 | CHECK_SYMBOL (fn_name); |
db9f0278 | 682 | defn = Fcons (Qlambda, Fcdr (args)); |
265a9e55 | 683 | if (!NILP (Vpurify_flag)) |
db9f0278 | 684 | defn = Fpurecopy (defn); |
f58e9f8c RS |
685 | if (CONSP (XSYMBOL (fn_name)->function) |
686 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
687 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 688 | Ffset (fn_name, defn); |
6fd797f5 | 689 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
690 | return fn_name; |
691 | } | |
692 | ||
693 | DEFUN ("defmacro", Fdefmacro, Sdefmacro, 2, UNEVALLED, 0, | |
9dbc9081 | 694 | doc: /* Define NAME as a macro. |
0654d6e3 RS |
695 | The actual definition looks like |
696 | (macro lambda ARGLIST [DOCSTRING] [DECL] BODY...). | |
9dbc9081 PJ |
697 | When the macro is called, as in (NAME ARGS...), |
698 | the function (lambda ARGLIST BODY...) is applied to | |
699 | the list ARGS... as it appears in the expression, | |
700 | and the result should be a form to be evaluated instead of the original. | |
0654d6e3 RS |
701 | |
702 | DECL is a declaration, optional, which can specify how to indent | |
703 | calls to this macro and how Edebug should handle it. It looks like this: | |
704 | (declare SPECS...) | |
705 | The elements can look like this: | |
706 | (indent INDENT) | |
707 | Set NAME's `lisp-indent-function' property to INDENT. | |
708 | ||
e509f168 | 709 | (debug DEBUG) |
0654d6e3 | 710 | Set NAME's `edebug-form-spec' property to DEBUG. (This is |
7d5c86e5 | 711 | equivalent to writing a `def-edebug-spec' for the macro.) |
0654d6e3 | 712 | usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */) |
9dbc9081 | 713 | (args) |
db9f0278 JB |
714 | Lisp_Object args; |
715 | { | |
716 | register Lisp_Object fn_name; | |
717 | register Lisp_Object defn; | |
d6edd563 | 718 | Lisp_Object lambda_list, doc, tail; |
db9f0278 JB |
719 | |
720 | fn_name = Fcar (args); | |
8e975df9 | 721 | CHECK_SYMBOL (fn_name); |
d6edd563 GM |
722 | lambda_list = Fcar (Fcdr (args)); |
723 | tail = Fcdr (Fcdr (args)); | |
724 | ||
725 | doc = Qnil; | |
726 | if (STRINGP (Fcar (tail))) | |
727 | { | |
e509f168 SM |
728 | doc = XCAR (tail); |
729 | tail = XCDR (tail); | |
d6edd563 GM |
730 | } |
731 | ||
732 | while (CONSP (Fcar (tail)) | |
733 | && EQ (Fcar (Fcar (tail)), Qdeclare)) | |
734 | { | |
735 | if (!NILP (Vmacro_declaration_function)) | |
736 | { | |
737 | struct gcpro gcpro1; | |
738 | GCPRO1 (args); | |
739 | call2 (Vmacro_declaration_function, fn_name, Fcar (tail)); | |
740 | UNGCPRO; | |
741 | } | |
177c0ea7 | 742 | |
d6edd563 GM |
743 | tail = Fcdr (tail); |
744 | } | |
745 | ||
746 | if (NILP (doc)) | |
747 | tail = Fcons (lambda_list, tail); | |
748 | else | |
749 | tail = Fcons (lambda_list, Fcons (doc, tail)); | |
750 | defn = Fcons (Qmacro, Fcons (Qlambda, tail)); | |
177c0ea7 | 751 | |
265a9e55 | 752 | if (!NILP (Vpurify_flag)) |
db9f0278 | 753 | defn = Fpurecopy (defn); |
f58e9f8c RS |
754 | if (CONSP (XSYMBOL (fn_name)->function) |
755 | && EQ (XCAR (XSYMBOL (fn_name)->function), Qautoload)) | |
756 | LOADHIST_ATTACH (Fcons (Qt, fn_name)); | |
db9f0278 | 757 | Ffset (fn_name, defn); |
6fd797f5 | 758 | LOADHIST_ATTACH (Fcons (Qdefun, fn_name)); |
db9f0278 JB |
759 | return fn_name; |
760 | } | |
761 | ||
19cebf5a | 762 | |
1848d15d | 763 | DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0, |
4a9308b8 | 764 | doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE. |
e102f0d8 | 765 | Aliased variables always have the same value; setting one sets the other. |
4a9308b8 JB |
766 | Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is |
767 | omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE, | |
768 | or of the variable at the end of the chain of aliases, if BASE-VARIABLE is | |
769 | itself an alias. | |
770 | The return value is BASE-VARIABLE. */) | |
771 | (new_alias, base_variable, docstring) | |
772 | Lisp_Object new_alias, base_variable, docstring; | |
19cebf5a GM |
773 | { |
774 | struct Lisp_Symbol *sym; | |
1848d15d | 775 | |
4a9308b8 JB |
776 | CHECK_SYMBOL (new_alias); |
777 | CHECK_SYMBOL (base_variable); | |
19cebf5a | 778 | |
4a9308b8 | 779 | if (SYMBOL_CONSTANT_P (new_alias)) |
19cebf5a GM |
780 | error ("Cannot make a constant an alias"); |
781 | ||
4a9308b8 | 782 | sym = XSYMBOL (new_alias); |
19cebf5a | 783 | sym->indirect_variable = 1; |
4a9308b8 JB |
784 | sym->value = base_variable; |
785 | sym->constant = SYMBOL_CONSTANT_P (base_variable); | |
786 | LOADHIST_ATTACH (new_alias); | |
1848d15d | 787 | if (!NILP (docstring)) |
4a9308b8 | 788 | Fput (new_alias, Qvariable_documentation, docstring); |
bd81fcf8 | 789 | else |
4a9308b8 | 790 | Fput (new_alias, Qvariable_documentation, Qnil); |
1848d15d | 791 | |
4a9308b8 | 792 | return base_variable; |
19cebf5a GM |
793 | } |
794 | ||
795 | ||
db9f0278 | 796 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, |
29357847 | 797 | doc: /* Define SYMBOL as a variable, and return SYMBOL. |
9dbc9081 PJ |
798 | You are not required to define a variable in order to use it, |
799 | but the definition can supply documentation and an initial value | |
800 | in a way that tags can recognize. | |
801 | ||
802 | INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void. | |
803 | If SYMBOL is buffer-local, its default value is what is set; | |
804 | buffer-local values are not affected. | |
805 | INITVALUE and DOCSTRING are optional. | |
806 | If DOCSTRING starts with *, this variable is identified as a user option. | |
807 | This means that M-x set-variable recognizes it. | |
808 | See also `user-variable-p'. | |
809 | If INITVALUE is missing, SYMBOL's value is not set. | |
733f68b6 LT |
810 | |
811 | If SYMBOL has a local binding, then this form affects the local | |
812 | binding. This is usually not what you want. Thus, if you need to | |
813 | load a file defining variables, with this form or with `defconst' or | |
814 | `defcustom', you should always load that file _outside_ any bindings | |
815 | for these variables. \(`defconst' and `defcustom' behave similarly in | |
816 | this respect.) | |
2df5238c | 817 | usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */) |
9dbc9081 | 818 | (args) |
db9f0278 JB |
819 | Lisp_Object args; |
820 | { | |
a42ba017 | 821 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
822 | |
823 | sym = Fcar (args); | |
a42ba017 RS |
824 | tail = Fcdr (args); |
825 | if (!NILP (Fcdr (Fcdr (tail)))) | |
921baa95 | 826 | error ("Too many arguments"); |
a42ba017 | 827 | |
33568849 | 828 | tem = Fdefault_boundp (sym); |
a42ba017 | 829 | if (!NILP (tail)) |
db9f0278 | 830 | { |
1c9916a1 SM |
831 | if (SYMBOL_CONSTANT_P (sym)) |
832 | { | |
833 | /* For upward compatibility, allow (defvar :foo (quote :foo)). */ | |
834 | Lisp_Object tem = Fcar (tail); | |
835 | if (! (CONSP (tem) | |
836 | && EQ (XCAR (tem), Qquote) | |
837 | && CONSP (XCDR (tem)) | |
838 | && EQ (XCAR (XCDR (tem)), sym))) | |
839 | error ("Constant symbol `%s' specified in defvar", | |
840 | SDATA (SYMBOL_NAME (sym))); | |
841 | } | |
842 | ||
265a9e55 | 843 | if (NILP (tem)) |
33568849 | 844 | Fset_default (sym, Feval (Fcar (tail))); |
d0bce91e SM |
845 | else |
846 | { /* Check if there is really a global binding rather than just a let | |
847 | binding that shadows the global unboundness of the var. */ | |
b28d0d9a | 848 | volatile struct specbinding *pdl = specpdl_ptr; |
d0bce91e SM |
849 | while (--pdl >= specpdl) |
850 | { | |
851 | if (EQ (pdl->symbol, sym) && !pdl->func | |
852 | && EQ (pdl->old_value, Qunbound)) | |
853 | { | |
854 | message_with_string ("Warning: defvar ignored because %s is let-bound", | |
855 | SYMBOL_NAME (sym), 1); | |
856 | break; | |
857 | } | |
858 | } | |
859 | } | |
33568849 | 860 | tail = Fcdr (tail); |
e509f168 SM |
861 | tem = Fcar (tail); |
862 | if (!NILP (tem)) | |
33568849 | 863 | { |
33568849 SM |
864 | if (!NILP (Vpurify_flag)) |
865 | tem = Fpurecopy (tem); | |
866 | Fput (sym, Qvariable_documentation, tem); | |
867 | } | |
6fd797f5 | 868 | LOADHIST_ATTACH (sym); |
db9f0278 | 869 | } |
33568849 | 870 | else |
d7c1d0fc RS |
871 | /* Simple (defvar <var>) should not count as a definition at all. |
872 | It could get in the way of other definitions, and unloading this | |
873 | package could try to make the variable unbound. */ | |
addf35fd AS |
874 | ; |
875 | ||
db9f0278 JB |
876 | return sym; |
877 | } | |
878 | ||
879 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
9dbc9081 PJ |
880 | doc: /* Define SYMBOL as a constant variable. |
881 | The intent is that neither programs nor users should ever change this value. | |
882 | Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
883 | If SYMBOL is buffer-local, its default value is what is set; | |
884 | buffer-local values are not affected. | |
885 | DOCSTRING is optional. | |
733f68b6 LT |
886 | |
887 | If SYMBOL has a local binding, then this form sets the local binding's | |
888 | value. However, you should normally not make local bindings for | |
889 | variables defined with this form. | |
7a25dc6d | 890 | usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */) |
9dbc9081 | 891 | (args) |
db9f0278 JB |
892 | Lisp_Object args; |
893 | { | |
894 | register Lisp_Object sym, tem; | |
895 | ||
896 | sym = Fcar (args); | |
a42ba017 | 897 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
921baa95 | 898 | error ("Too many arguments"); |
a42ba017 | 899 | |
1182a7cb DL |
900 | tem = Feval (Fcar (Fcdr (args))); |
901 | if (!NILP (Vpurify_flag)) | |
902 | tem = Fpurecopy (tem); | |
903 | Fset_default (sym, tem); | |
db9f0278 | 904 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 905 | if (!NILP (tem)) |
db9f0278 | 906 | { |
265a9e55 | 907 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
908 | tem = Fpurecopy (tem); |
909 | Fput (sym, Qvariable_documentation, tem); | |
910 | } | |
873759d5 | 911 | Fput (sym, Qrisky_local_variable, Qt); |
6fd797f5 | 912 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
913 | return sym; |
914 | } | |
915 | ||
606cdb89 JB |
916 | /* Error handler used in Fuser_variable_p. */ |
917 | static Lisp_Object | |
918 | user_variable_p_eh (ignore) | |
919 | Lisp_Object ignore; | |
920 | { | |
921 | return Qnil; | |
922 | } | |
923 | ||
db9f0278 | 924 | DEFUN ("user-variable-p", Fuser_variable_p, Suser_variable_p, 1, 1, 0, |
606cdb89 | 925 | doc: /* Return t if VARIABLE is intended to be set and modified by users. |
9dbc9081 | 926 | \(The alternative is a variable used internally in a Lisp program.) |
606cdb89 JB |
927 | A variable is a user variable if |
928 | \(1) the first character of its documentation is `*', or | |
929 | \(2) it is customizable (its property list contains a non-nil value | |
930 | of `standard-value' or `custom-autoload'), or | |
931 | \(3) it is an alias for another user variable. | |
932 | Return nil if VARIABLE is an alias and there is a loop in the | |
933 | chain of symbols. */) | |
9dbc9081 | 934 | (variable) |
db9f0278 JB |
935 | Lisp_Object variable; |
936 | { | |
937 | Lisp_Object documentation; | |
177c0ea7 | 938 | |
5e78e475 RS |
939 | if (!SYMBOLP (variable)) |
940 | return Qnil; | |
941 | ||
606cdb89 JB |
942 | /* If indirect and there's an alias loop, don't check anything else. */ |
943 | if (XSYMBOL (variable)->indirect_variable | |
944 | && NILP (internal_condition_case_1 (indirect_variable, variable, | |
945 | Qt, user_variable_p_eh))) | |
946 | return Qnil; | |
947 | ||
948 | while (1) | |
949 | { | |
950 | documentation = Fget (variable, Qvariable_documentation); | |
951 | if (INTEGERP (documentation) && XINT (documentation) < 0) | |
952 | return Qt; | |
953 | if (STRINGP (documentation) | |
954 | && ((unsigned char) SREF (documentation, 0) == '*')) | |
955 | return Qt; | |
956 | /* If it is (STRING . INTEGER), a negative integer means a user variable. */ | |
957 | if (CONSP (documentation) | |
958 | && STRINGP (XCAR (documentation)) | |
959 | && INTEGERP (XCDR (documentation)) | |
960 | && XINT (XCDR (documentation)) < 0) | |
961 | return Qt; | |
962 | /* Customizable? See `custom-variable-p'. */ | |
963 | if ((!NILP (Fget (variable, intern ("standard-value")))) | |
964 | || (!NILP (Fget (variable, intern ("custom-autoload"))))) | |
965 | return Qt; | |
966 | ||
967 | if (!XSYMBOL (variable)->indirect_variable) | |
968 | return Qnil; | |
969 | ||
970 | /* An indirect variable? Let's follow the chain. */ | |
971 | variable = XSYMBOL (variable)->value; | |
972 | } | |
177c0ea7 | 973 | } |
db9f0278 JB |
974 | \f |
975 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
976 | doc: /* Bind variables according to VARLIST then eval BODY. |
977 | The value of the last form in BODY is returned. | |
978 | Each element of VARLIST is a symbol (which is bound to nil) | |
979 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
980 | Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
7a25dc6d | 981 | usage: (let* VARLIST BODY...) */) |
9dbc9081 | 982 | (args) |
db9f0278 JB |
983 | Lisp_Object args; |
984 | { | |
985 | Lisp_Object varlist, val, elt; | |
aed13378 | 986 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
987 | struct gcpro gcpro1, gcpro2, gcpro3; |
988 | ||
989 | GCPRO3 (args, elt, varlist); | |
990 | ||
991 | varlist = Fcar (args); | |
265a9e55 | 992 | while (!NILP (varlist)) |
db9f0278 JB |
993 | { |
994 | QUIT; | |
995 | elt = Fcar (varlist); | |
90165123 | 996 | if (SYMBOLP (elt)) |
db9f0278 | 997 | specbind (elt, Qnil); |
08564963 | 998 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 999 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1000 | else |
1001 | { | |
1002 | val = Feval (Fcar (Fcdr (elt))); | |
1003 | specbind (Fcar (elt), val); | |
1004 | } | |
1005 | varlist = Fcdr (varlist); | |
1006 | } | |
1007 | UNGCPRO; | |
1008 | val = Fprogn (Fcdr (args)); | |
1009 | return unbind_to (count, val); | |
1010 | } | |
1011 | ||
1012 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1013 | doc: /* Bind variables according to VARLIST then eval BODY. |
1014 | The value of the last form in BODY is returned. | |
1015 | Each element of VARLIST is a symbol (which is bound to nil) | |
1016 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
1017 | All the VALUEFORMs are evalled before any symbols are bound. | |
7a25dc6d | 1018 | usage: (let VARLIST BODY...) */) |
9dbc9081 | 1019 | (args) |
db9f0278 JB |
1020 | Lisp_Object args; |
1021 | { | |
1022 | Lisp_Object *temps, tem; | |
1023 | register Lisp_Object elt, varlist; | |
aed13378 | 1024 | int count = SPECPDL_INDEX (); |
db9f0278 JB |
1025 | register int argnum; |
1026 | struct gcpro gcpro1, gcpro2; | |
1027 | ||
1028 | varlist = Fcar (args); | |
1029 | ||
1030 | /* Make space to hold the values to give the bound variables */ | |
1031 | elt = Flength (varlist); | |
1032 | temps = (Lisp_Object *) alloca (XFASTINT (elt) * sizeof (Lisp_Object)); | |
1033 | ||
1034 | /* Compute the values and store them in `temps' */ | |
1035 | ||
1036 | GCPRO2 (args, *temps); | |
1037 | gcpro2.nvars = 0; | |
1038 | ||
265a9e55 | 1039 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
1040 | { |
1041 | QUIT; | |
1042 | elt = Fcar (varlist); | |
90165123 | 1043 | if (SYMBOLP (elt)) |
db9f0278 | 1044 | temps [argnum++] = Qnil; |
08564963 | 1045 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 1046 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
1047 | else |
1048 | temps [argnum++] = Feval (Fcar (Fcdr (elt))); | |
1049 | gcpro2.nvars = argnum; | |
1050 | } | |
1051 | UNGCPRO; | |
1052 | ||
1053 | varlist = Fcar (args); | |
265a9e55 | 1054 | for (argnum = 0; !NILP (varlist); varlist = Fcdr (varlist)) |
db9f0278 JB |
1055 | { |
1056 | elt = Fcar (varlist); | |
1057 | tem = temps[argnum++]; | |
90165123 | 1058 | if (SYMBOLP (elt)) |
db9f0278 JB |
1059 | specbind (elt, tem); |
1060 | else | |
1061 | specbind (Fcar (elt), tem); | |
1062 | } | |
1063 | ||
1064 | elt = Fprogn (Fcdr (args)); | |
1065 | return unbind_to (count, elt); | |
1066 | } | |
1067 | ||
1068 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1069 | doc: /* If TEST yields non-nil, eval BODY... and repeat. |
1070 | The order of execution is thus TEST, BODY, TEST, BODY and so on | |
1071 | until TEST returns nil. | |
7a25dc6d | 1072 | usage: (while TEST BODY...) */) |
9dbc9081 | 1073 | (args) |
db9f0278 JB |
1074 | Lisp_Object args; |
1075 | { | |
2b9bde76 | 1076 | Lisp_Object test, body; |
db9f0278 JB |
1077 | struct gcpro gcpro1, gcpro2; |
1078 | ||
1079 | GCPRO2 (test, body); | |
1080 | ||
1081 | test = Fcar (args); | |
1082 | body = Fcdr (args); | |
2b9bde76 | 1083 | while (!NILP (Feval (test))) |
db9f0278 JB |
1084 | { |
1085 | QUIT; | |
1086 | Fprogn (body); | |
1087 | } | |
1088 | ||
1089 | UNGCPRO; | |
1090 | return Qnil; | |
1091 | } | |
1092 | ||
1093 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
9dbc9081 PJ |
1094 | doc: /* Return result of expanding macros at top level of FORM. |
1095 | If FORM is not a macro call, it is returned unchanged. | |
1096 | Otherwise, the macro is expanded and the expansion is considered | |
1097 | in place of FORM. When a non-macro-call results, it is returned. | |
1098 | ||
1099 | The second optional arg ENVIRONMENT specifies an environment of macro | |
1100 | definitions to shadow the loaded ones for use in file byte-compilation. */) | |
1101 | (form, environment) | |
2e267a2e | 1102 | Lisp_Object form; |
79e8bfbf | 1103 | Lisp_Object environment; |
db9f0278 | 1104 | { |
23d6b5a6 | 1105 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
1106 | register Lisp_Object expander, sym, def, tem; |
1107 | ||
1108 | while (1) | |
1109 | { | |
1110 | /* Come back here each time we expand a macro call, | |
1111 | in case it expands into another macro call. */ | |
90165123 | 1112 | if (!CONSP (form)) |
db9f0278 | 1113 | break; |
23d6b5a6 | 1114 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 1115 | def = sym = XCAR (form); |
23d6b5a6 | 1116 | tem = Qnil; |
db9f0278 JB |
1117 | /* Trace symbols aliases to other symbols |
1118 | until we get a symbol that is not an alias. */ | |
90165123 | 1119 | while (SYMBOLP (def)) |
db9f0278 JB |
1120 | { |
1121 | QUIT; | |
23d6b5a6 | 1122 | sym = def; |
79e8bfbf | 1123 | tem = Fassq (sym, environment); |
265a9e55 | 1124 | if (NILP (tem)) |
db9f0278 JB |
1125 | { |
1126 | def = XSYMBOL (sym)->function; | |
23d6b5a6 JB |
1127 | if (!EQ (def, Qunbound)) |
1128 | continue; | |
db9f0278 | 1129 | } |
23d6b5a6 | 1130 | break; |
db9f0278 | 1131 | } |
79e8bfbf | 1132 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 1133 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 1134 | if (NILP (tem)) |
db9f0278 | 1135 | { |
79e8bfbf | 1136 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 1137 | Look at its function definition. */ |
90165123 | 1138 | if (EQ (def, Qunbound) || !CONSP (def)) |
db9f0278 JB |
1139 | /* Not defined or definition not suitable */ |
1140 | break; | |
03699b14 | 1141 | if (EQ (XCAR (def), Qautoload)) |
db9f0278 JB |
1142 | { |
1143 | /* Autoloading function: will it be a macro when loaded? */ | |
ee9ee63c | 1144 | tem = Fnth (make_number (4), def); |
47ccd8b6 | 1145 | if (EQ (tem, Qt) || EQ (tem, Qmacro)) |
ee9ee63c JB |
1146 | /* Yes, load it and try again. */ |
1147 | { | |
ca20916b RS |
1148 | struct gcpro gcpro1; |
1149 | GCPRO1 (form); | |
ee9ee63c | 1150 | do_autoload (def, sym); |
ca20916b | 1151 | UNGCPRO; |
ee9ee63c JB |
1152 | continue; |
1153 | } | |
1154 | else | |
db9f0278 | 1155 | break; |
db9f0278 | 1156 | } |
03699b14 | 1157 | else if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 1158 | break; |
03699b14 | 1159 | else expander = XCDR (def); |
db9f0278 JB |
1160 | } |
1161 | else | |
1162 | { | |
03699b14 | 1163 | expander = XCDR (tem); |
265a9e55 | 1164 | if (NILP (expander)) |
db9f0278 JB |
1165 | break; |
1166 | } | |
03699b14 | 1167 | form = apply1 (expander, XCDR (form)); |
db9f0278 JB |
1168 | } |
1169 | return form; | |
1170 | } | |
1171 | \f | |
1172 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1173 | doc: /* Eval BODY allowing nonlocal exits using `throw'. |
1174 | TAG is evalled to get the tag to use; it must not be nil. | |
1175 | ||
1176 | Then the BODY is executed. | |
1d632ccf | 1177 | Within BODY, a call to `throw' with the same TAG exits BODY and this `catch'. |
9dbc9081 PJ |
1178 | If no throw happens, `catch' returns the value of the last BODY form. |
1179 | If a throw happens, it specifies the value to return from `catch'. | |
7a25dc6d | 1180 | usage: (catch TAG BODY...) */) |
9dbc9081 | 1181 | (args) |
db9f0278 JB |
1182 | Lisp_Object args; |
1183 | { | |
1184 | register Lisp_Object tag; | |
1185 | struct gcpro gcpro1; | |
1186 | ||
1187 | GCPRO1 (args); | |
1188 | tag = Feval (Fcar (args)); | |
1189 | UNGCPRO; | |
1190 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
1191 | } | |
1192 | ||
1193 | /* Set up a catch, then call C function FUNC on argument ARG. | |
1194 | FUNC should return a Lisp_Object. | |
1195 | This is how catches are done from within C code. */ | |
1196 | ||
1197 | Lisp_Object | |
1198 | internal_catch (tag, func, arg) | |
1199 | Lisp_Object tag; | |
1200 | Lisp_Object (*func) (); | |
1201 | Lisp_Object arg; | |
1202 | { | |
1203 | /* This structure is made part of the chain `catchlist'. */ | |
1204 | struct catchtag c; | |
1205 | ||
1206 | /* Fill in the components of c, and put it on the list. */ | |
1207 | c.next = catchlist; | |
1208 | c.tag = tag; | |
1209 | c.val = Qnil; | |
1210 | c.backlist = backtrace_list; | |
1211 | c.handlerlist = handlerlist; | |
1212 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1213 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1214 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1215 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1216 | c.gcpro = gcprolist; |
bcf28080 | 1217 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1218 | catchlist = &c; |
1219 | ||
1220 | /* Call FUNC. */ | |
1221 | if (! _setjmp (c.jmp)) | |
1222 | c.val = (*func) (arg); | |
1223 | ||
1224 | /* Throw works by a longjmp that comes right here. */ | |
1225 | catchlist = c.next; | |
1226 | return c.val; | |
1227 | } | |
1228 | ||
ba410f40 JB |
1229 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1230 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1231 | |
ba410f40 JB |
1232 | This is the guts Fthrow and Fsignal; they differ only in the way |
1233 | they choose the catch tag to throw to. A catch tag for a | |
1234 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1235 | |
ba410f40 JB |
1236 | Before each catch is discarded, unbind all special bindings and |
1237 | execute all unwind-protect clauses made above that catch. Unwind | |
1238 | the handler stack as we go, so that the proper handlers are in | |
1239 | effect for each unwind-protect clause we run. At the end, restore | |
1240 | some static info saved in CATCH, and longjmp to the location | |
1241 | specified in the | |
1242 | ||
1243 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 JB |
1244 | |
1245 | static void | |
ba410f40 | 1246 | unwind_to_catch (catch, value) |
db9f0278 | 1247 | struct catchtag *catch; |
ba410f40 | 1248 | Lisp_Object value; |
db9f0278 JB |
1249 | { |
1250 | register int last_time; | |
1251 | ||
ba410f40 JB |
1252 | /* Save the value in the tag. */ |
1253 | catch->val = value; | |
1254 | ||
0b31741c | 1255 | /* Restore certain special C variables. */ |
1cdc3155 | 1256 | set_poll_suppress_count (catch->poll_suppress_count); |
c1788fbc | 1257 | UNBLOCK_INPUT_TO (catch->interrupt_input_blocked); |
0b31741c | 1258 | handling_signal = 0; |
69bbd6bd | 1259 | immediate_quit = 0; |
82da7701 | 1260 | |
db9f0278 JB |
1261 | do |
1262 | { | |
1263 | last_time = catchlist == catch; | |
82da7701 JB |
1264 | |
1265 | /* Unwind the specpdl stack, and then restore the proper set of | |
1266 | handlers. */ | |
db9f0278 JB |
1267 | unbind_to (catchlist->pdlcount, Qnil); |
1268 | handlerlist = catchlist->handlerlist; | |
1269 | catchlist = catchlist->next; | |
1270 | } | |
1271 | while (! last_time); | |
1272 | ||
a2a103bb | 1273 | #if HAVE_X_WINDOWS |
88019a63 RS |
1274 | /* If x_catch_errors was done, turn it off now. |
1275 | (First we give unbind_to a chance to do that.) */ | |
1276 | x_fully_uncatch_errors (); | |
a2a103bb | 1277 | #endif |
88019a63 | 1278 | |
bcf28080 | 1279 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1280 | gcprolist = catch->gcpro; |
15934ffa RS |
1281 | #ifdef DEBUG_GCPRO |
1282 | if (gcprolist != 0) | |
1283 | gcpro_level = gcprolist->level + 1; | |
1284 | else | |
1285 | gcpro_level = 0; | |
1286 | #endif | |
db9f0278 JB |
1287 | backtrace_list = catch->backlist; |
1288 | lisp_eval_depth = catch->lisp_eval_depth; | |
177c0ea7 | 1289 | |
ba410f40 | 1290 | _longjmp (catch->jmp, 1); |
db9f0278 JB |
1291 | } |
1292 | ||
1293 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, | |
9dbc9081 PJ |
1294 | doc: /* Throw to the catch for TAG and return VALUE from it. |
1295 | Both TAG and VALUE are evalled. */) | |
1296 | (tag, value) | |
79e8bfbf | 1297 | register Lisp_Object tag, value; |
db9f0278 JB |
1298 | { |
1299 | register struct catchtag *c; | |
1300 | ||
8788120f KS |
1301 | if (!NILP (tag)) |
1302 | for (c = catchlist; c; c = c->next) | |
1303 | { | |
1304 | if (EQ (c->tag, tag)) | |
1305 | unwind_to_catch (c, value); | |
1306 | } | |
734d55a2 | 1307 | xsignal2 (Qno_catch, tag, value); |
db9f0278 JB |
1308 | } |
1309 | ||
1310 | ||
1311 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1312 | doc: /* Do BODYFORM, protecting with UNWINDFORMS. |
1313 | If BODYFORM completes normally, its value is returned | |
1314 | after executing the UNWINDFORMS. | |
1315 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
7a25dc6d | 1316 | usage: (unwind-protect BODYFORM UNWINDFORMS...) */) |
9dbc9081 | 1317 | (args) |
db9f0278 JB |
1318 | Lisp_Object args; |
1319 | { | |
1320 | Lisp_Object val; | |
aed13378 | 1321 | int count = SPECPDL_INDEX (); |
db9f0278 | 1322 | |
04b28167 | 1323 | record_unwind_protect (Fprogn, Fcdr (args)); |
db9f0278 | 1324 | val = Feval (Fcar (args)); |
177c0ea7 | 1325 | return unbind_to (count, val); |
db9f0278 JB |
1326 | } |
1327 | \f | |
1328 | /* Chain of condition handlers currently in effect. | |
1329 | The elements of this chain are contained in the stack frames | |
1330 | of Fcondition_case and internal_condition_case. | |
1331 | When an error is signaled (by calling Fsignal, below), | |
1332 | this chain is searched for an element that applies. */ | |
1333 | ||
1334 | struct handler *handlerlist; | |
1335 | ||
1336 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, | |
9dbc9081 | 1337 | doc: /* Regain control when an error is signaled. |
1b1acc13 | 1338 | Executes BODYFORM and returns its value if no error happens. |
9dbc9081 PJ |
1339 | Each element of HANDLERS looks like (CONDITION-NAME BODY...) |
1340 | where the BODY is made of Lisp expressions. | |
1341 | ||
1342 | A handler is applicable to an error | |
1343 | if CONDITION-NAME is one of the error's condition names. | |
1344 | If an error happens, the first applicable handler is run. | |
1345 | ||
1346 | The car of a handler may be a list of condition names | |
1347 | instead of a single condition name. | |
1348 | ||
1349 | When a handler handles an error, | |
1350 | control returns to the condition-case and the handler BODY... is executed | |
1351 | with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
1352 | VAR may be nil; then you do not get access to the signal information. | |
1353 | ||
1354 | The value of the last BODY form is returned from the condition-case. | |
1355 | See also the function `signal' for more info. | |
2b47b74d | 1356 | usage: (condition-case VAR BODYFORM &rest HANDLERS) */) |
9dbc9081 | 1357 | (args) |
db9f0278 JB |
1358 | Lisp_Object args; |
1359 | { | |
17401c97 GM |
1360 | register Lisp_Object bodyform, handlers; |
1361 | volatile Lisp_Object var; | |
db9f0278 | 1362 | |
82da7701 JB |
1363 | var = Fcar (args); |
1364 | bodyform = Fcar (Fcdr (args)); | |
1365 | handlers = Fcdr (Fcdr (args)); | |
ee830945 RS |
1366 | |
1367 | return internal_lisp_condition_case (var, bodyform, handlers); | |
1368 | } | |
1369 | ||
1370 | /* Like Fcondition_case, but the args are separate | |
1371 | rather than passed in a list. Used by Fbyte_code. */ | |
1372 | ||
1373 | Lisp_Object | |
1374 | internal_lisp_condition_case (var, bodyform, handlers) | |
1375 | volatile Lisp_Object var; | |
1376 | Lisp_Object bodyform, handlers; | |
1377 | { | |
1378 | Lisp_Object val; | |
1379 | struct catchtag c; | |
1380 | struct handler h; | |
1381 | ||
b7826503 | 1382 | CHECK_SYMBOL (var); |
82da7701 | 1383 | |
2b47b74d | 1384 | for (val = handlers; CONSP (val); val = XCDR (val)) |
82da7701 JB |
1385 | { |
1386 | Lisp_Object tem; | |
2b47b74d | 1387 | tem = XCAR (val); |
5f96776a RS |
1388 | if (! (NILP (tem) |
1389 | || (CONSP (tem) | |
03699b14 KR |
1390 | && (SYMBOLP (XCAR (tem)) |
1391 | || CONSP (XCAR (tem)))))) | |
82da7701 JB |
1392 | error ("Invalid condition handler", tem); |
1393 | } | |
db9f0278 JB |
1394 | |
1395 | c.tag = Qnil; | |
1396 | c.val = Qnil; | |
1397 | c.backlist = backtrace_list; | |
1398 | c.handlerlist = handlerlist; | |
1399 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1400 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1401 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1402 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1403 | c.gcpro = gcprolist; |
bcf28080 | 1404 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1405 | if (_setjmp (c.jmp)) |
1406 | { | |
265a9e55 | 1407 | if (!NILP (h.var)) |
9d58218c RS |
1408 | specbind (h.var, c.val); |
1409 | val = Fprogn (Fcdr (h.chosen_clause)); | |
82da7701 JB |
1410 | |
1411 | /* Note that this just undoes the binding of h.var; whoever | |
1412 | longjumped to us unwound the stack to c.pdlcount before | |
1413 | throwing. */ | |
db9f0278 JB |
1414 | unbind_to (c.pdlcount, Qnil); |
1415 | return val; | |
1416 | } | |
1417 | c.next = catchlist; | |
1418 | catchlist = &c; | |
177c0ea7 | 1419 | |
82da7701 JB |
1420 | h.var = var; |
1421 | h.handler = handlers; | |
db9f0278 | 1422 | h.next = handlerlist; |
db9f0278 JB |
1423 | h.tag = &c; |
1424 | handlerlist = &h; | |
1425 | ||
82da7701 | 1426 | val = Feval (bodyform); |
db9f0278 JB |
1427 | catchlist = c.next; |
1428 | handlerlist = h.next; | |
1429 | return val; | |
1430 | } | |
1431 | ||
f029ca5f RS |
1432 | /* Call the function BFUN with no arguments, catching errors within it |
1433 | according to HANDLERS. If there is an error, call HFUN with | |
1434 | one argument which is the data that describes the error: | |
1435 | (SIGNALNAME . DATA) | |
1436 | ||
1437 | HANDLERS can be a list of conditions to catch. | |
1438 | If HANDLERS is Qt, catch all errors. | |
1439 | If HANDLERS is Qerror, catch all errors | |
1440 | but allow the debugger to run if that is enabled. */ | |
1441 | ||
db9f0278 JB |
1442 | Lisp_Object |
1443 | internal_condition_case (bfun, handlers, hfun) | |
1444 | Lisp_Object (*bfun) (); | |
1445 | Lisp_Object handlers; | |
1446 | Lisp_Object (*hfun) (); | |
1447 | { | |
1448 | Lisp_Object val; | |
1449 | struct catchtag c; | |
1450 | struct handler h; | |
1451 | ||
88019a63 RS |
1452 | /* Since Fsignal will close off all calls to x_catch_errors, |
1453 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1454 | #if HAVE_X_WINDOWS |
88019a63 | 1455 | if (x_catching_errors ()) |
01591d17 | 1456 | abort (); |
a2a103bb | 1457 | #endif |
01591d17 | 1458 | |
db9f0278 JB |
1459 | c.tag = Qnil; |
1460 | c.val = Qnil; | |
1461 | c.backlist = backtrace_list; | |
1462 | c.handlerlist = handlerlist; | |
1463 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1464 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1465 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1466 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1467 | c.gcpro = gcprolist; |
bcf28080 | 1468 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1469 | if (_setjmp (c.jmp)) |
1470 | { | |
9d58218c | 1471 | return (*hfun) (c.val); |
db9f0278 JB |
1472 | } |
1473 | c.next = catchlist; | |
1474 | catchlist = &c; | |
1475 | h.handler = handlers; | |
1476 | h.var = Qnil; | |
db9f0278 JB |
1477 | h.next = handlerlist; |
1478 | h.tag = &c; | |
1479 | handlerlist = &h; | |
1480 | ||
1481 | val = (*bfun) (); | |
1482 | catchlist = c.next; | |
1483 | handlerlist = h.next; | |
1484 | return val; | |
1485 | } | |
1486 | ||
2659a09f | 1487 | /* Like internal_condition_case but call BFUN with ARG as its argument. */ |
f029ca5f | 1488 | |
d227775c RS |
1489 | Lisp_Object |
1490 | internal_condition_case_1 (bfun, arg, handlers, hfun) | |
1491 | Lisp_Object (*bfun) (); | |
1492 | Lisp_Object arg; | |
1493 | Lisp_Object handlers; | |
1494 | Lisp_Object (*hfun) (); | |
1495 | { | |
1496 | Lisp_Object val; | |
1497 | struct catchtag c; | |
1498 | struct handler h; | |
1499 | ||
88019a63 RS |
1500 | /* Since Fsignal will close off all calls to x_catch_errors, |
1501 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1502 | #if HAVE_X_WINDOWS |
88019a63 RS |
1503 | if (x_catching_errors ()) |
1504 | abort (); | |
a2a103bb | 1505 | #endif |
88019a63 | 1506 | |
d227775c RS |
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 GM |
1534 | |
1535 | ||
2659a09f | 1536 | /* Like internal_condition_case but call BFUN with NARGS as first, |
10b29d41 GM |
1537 | and ARGS as second argument. */ |
1538 | ||
1539 | Lisp_Object | |
1540 | internal_condition_case_2 (bfun, nargs, args, handlers, hfun) | |
1541 | Lisp_Object (*bfun) (); | |
1542 | int nargs; | |
1543 | Lisp_Object *args; | |
1544 | Lisp_Object handlers; | |
1545 | Lisp_Object (*hfun) (); | |
1546 | { | |
1547 | Lisp_Object val; | |
1548 | struct catchtag c; | |
1549 | struct handler h; | |
1550 | ||
88019a63 RS |
1551 | /* Since Fsignal will close off all calls to x_catch_errors, |
1552 | we will get the wrong results if some are not closed now. */ | |
a2a103bb | 1553 | #if HAVE_X_WINDOWS |
88019a63 RS |
1554 | if (x_catching_errors ()) |
1555 | abort (); | |
a2a103bb | 1556 | #endif |
88019a63 | 1557 | |
10b29d41 GM |
1558 | c.tag = Qnil; |
1559 | c.val = Qnil; | |
1560 | c.backlist = backtrace_list; | |
1561 | c.handlerlist = handlerlist; | |
1562 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1563 | c.pdlcount = SPECPDL_INDEX (); |
10b29d41 | 1564 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1565 | c.interrupt_input_blocked = interrupt_input_blocked; |
10b29d41 GM |
1566 | c.gcpro = gcprolist; |
1567 | c.byte_stack = byte_stack_list; | |
1568 | if (_setjmp (c.jmp)) | |
1569 | { | |
1570 | return (*hfun) (c.val); | |
1571 | } | |
1572 | c.next = catchlist; | |
1573 | catchlist = &c; | |
1574 | h.handler = handlers; | |
1575 | h.var = Qnil; | |
1576 | h.next = handlerlist; | |
1577 | h.tag = &c; | |
1578 | handlerlist = &h; | |
1579 | ||
1580 | val = (*bfun) (nargs, args); | |
1581 | catchlist = c.next; | |
1582 | handlerlist = h.next; | |
1583 | return val; | |
1584 | } | |
1585 | ||
d227775c | 1586 | \f |
2901f1d1 SM |
1587 | static Lisp_Object find_handler_clause P_ ((Lisp_Object, Lisp_Object, |
1588 | Lisp_Object, Lisp_Object, | |
1589 | Lisp_Object *)); | |
db9f0278 JB |
1590 | |
1591 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, | |
9dbc9081 PJ |
1592 | doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA. |
1593 | This function does not return. | |
1594 | ||
1595 | An error symbol is a symbol with an `error-conditions' property | |
1596 | that is a list of condition names. | |
1597 | A handler for any of those names will get to handle this signal. | |
1598 | The symbol `error' should normally be one of them. | |
1599 | ||
1600 | DATA should be a list. Its elements are printed as part of the error message. | |
3297ec22 LT |
1601 | See Info anchor `(elisp)Definition of signal' for some details on how this |
1602 | error message is constructed. | |
9dbc9081 PJ |
1603 | If the signal is handled, DATA is made available to the handler. |
1604 | See also the function `condition-case'. */) | |
1605 | (error_symbol, data) | |
4200e719 | 1606 | Lisp_Object error_symbol, data; |
db9f0278 | 1607 | { |
bfa8ca43 | 1608 | /* When memory is full, ERROR-SYMBOL is nil, |
26631f2b RS |
1609 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). |
1610 | That is a special case--don't do this in other situations. */ | |
db9f0278 JB |
1611 | register struct handler *allhandlers = handlerlist; |
1612 | Lisp_Object conditions; | |
1613 | extern int gc_in_progress; | |
1614 | extern int waiting_for_input; | |
1615 | Lisp_Object debugger_value; | |
c11d3d17 | 1616 | Lisp_Object string; |
1ea9dec4 | 1617 | Lisp_Object real_error_symbol; |
a2ff3819 | 1618 | struct backtrace *bp; |
db9f0278 | 1619 | |
346598f1 | 1620 | immediate_quit = handling_signal = 0; |
d063129f | 1621 | abort_on_gc = 0; |
db9f0278 JB |
1622 | if (gc_in_progress || waiting_for_input) |
1623 | abort (); | |
1624 | ||
1ea9dec4 RS |
1625 | if (NILP (error_symbol)) |
1626 | real_error_symbol = Fcar (data); | |
1627 | else | |
1628 | real_error_symbol = error_symbol; | |
1629 | ||
26631f2b RS |
1630 | #if 0 /* rms: I don't know why this was here, |
1631 | but it is surely wrong for an error that is handled. */ | |
48f8dfa3 | 1632 | #ifdef HAVE_X_WINDOWS |
df6c90d8 GM |
1633 | if (display_hourglass_p) |
1634 | cancel_hourglass (); | |
48f8dfa3 | 1635 | #endif |
177c0ea7 | 1636 | #endif |
48f8dfa3 | 1637 | |
61ede770 | 1638 | /* This hook is used by edebug. */ |
26631f2b RS |
1639 | if (! NILP (Vsignal_hook_function) |
1640 | && ! NILP (error_symbol)) | |
9f5903bb RS |
1641 | { |
1642 | /* Edebug takes care of restoring these variables when it exits. */ | |
1643 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1644 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1645 | ||
1646 | if (SPECPDL_INDEX () + 40 > max_specpdl_size) | |
1647 | max_specpdl_size = SPECPDL_INDEX () + 40; | |
1648 | ||
1649 | call2 (Vsignal_hook_function, error_symbol, data); | |
1650 | } | |
61ede770 | 1651 | |
1ea9dec4 | 1652 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1653 | |
a2ff3819 GM |
1654 | /* Remember from where signal was called. Skip over the frame for |
1655 | `signal' itself. If a frame for `error' follows, skip that, | |
26631f2b RS |
1656 | too. Don't do this when ERROR_SYMBOL is nil, because that |
1657 | is a memory-full error. */ | |
090a072f | 1658 | Vsignaling_function = Qnil; |
26631f2b | 1659 | if (backtrace_list && !NILP (error_symbol)) |
090a072f GM |
1660 | { |
1661 | bp = backtrace_list->next; | |
1662 | if (bp && bp->function && EQ (*bp->function, Qerror)) | |
1663 | bp = bp->next; | |
1664 | if (bp && bp->function) | |
1665 | Vsignaling_function = *bp->function; | |
1666 | } | |
a2ff3819 | 1667 | |
db9f0278 JB |
1668 | for (; handlerlist; handlerlist = handlerlist->next) |
1669 | { | |
1670 | register Lisp_Object clause; | |
177c0ea7 | 1671 | |
db9f0278 | 1672 | clause = find_handler_clause (handlerlist->handler, conditions, |
4200e719 | 1673 | error_symbol, data, &debugger_value); |
db9f0278 | 1674 | |
db9f0278 | 1675 | if (EQ (clause, Qlambda)) |
82da7701 | 1676 | { |
690337b7 KH |
1677 | /* We can't return values to code which signaled an error, but we |
1678 | can continue code which has signaled a quit. */ | |
1ea9dec4 | 1679 | if (EQ (real_error_symbol, Qquit)) |
82da7701 JB |
1680 | return Qnil; |
1681 | else | |
d3e6f8be | 1682 | error ("Cannot return from the debugger in an error"); |
82da7701 | 1683 | } |
db9f0278 | 1684 | |
265a9e55 | 1685 | if (!NILP (clause)) |
db9f0278 | 1686 | { |
9d58218c | 1687 | Lisp_Object unwind_data; |
db9f0278 | 1688 | struct handler *h = handlerlist; |
9d58218c | 1689 | |
db9f0278 | 1690 | handlerlist = allhandlers; |
1ea9dec4 RS |
1691 | |
1692 | if (NILP (error_symbol)) | |
1693 | unwind_data = data; | |
9d58218c RS |
1694 | else |
1695 | unwind_data = Fcons (error_symbol, data); | |
1696 | h->chosen_clause = clause; | |
1697 | unwind_to_catch (h->tag, unwind_data); | |
db9f0278 JB |
1698 | } |
1699 | } | |
1700 | ||
1701 | handlerlist = allhandlers; | |
1702 | /* If no handler is present now, try to run the debugger, | |
1703 | and if that fails, throw to top level. */ | |
4200e719 | 1704 | find_handler_clause (Qerror, conditions, error_symbol, data, &debugger_value); |
c11d3d17 RS |
1705 | if (catchlist != 0) |
1706 | Fthrow (Qtop_level, Qt); | |
1707 | ||
1ea9dec4 | 1708 | if (! NILP (error_symbol)) |
c11d3d17 RS |
1709 | data = Fcons (error_symbol, data); |
1710 | ||
1711 | string = Ferror_message_string (data); | |
d5db4077 | 1712 | fatal ("%s", SDATA (string), 0); |
db9f0278 JB |
1713 | } |
1714 | ||
734d55a2 KS |
1715 | /* Internal version of Fsignal that never returns. |
1716 | Used for anything but Qquit (which can return from Fsignal). */ | |
1717 | ||
1718 | void | |
1719 | xsignal (error_symbol, data) | |
1720 | Lisp_Object error_symbol, data; | |
1721 | { | |
1722 | Fsignal (error_symbol, data); | |
1723 | abort (); | |
1724 | } | |
1725 | ||
1726 | /* Like xsignal, but takes 0, 1, 2, or 3 args instead of a list. */ | |
1727 | ||
1728 | void | |
1729 | xsignal0 (error_symbol) | |
1730 | Lisp_Object error_symbol; | |
1731 | { | |
1732 | xsignal (error_symbol, Qnil); | |
1733 | } | |
1734 | ||
1735 | void | |
1736 | xsignal1 (error_symbol, arg) | |
1737 | Lisp_Object error_symbol, arg; | |
1738 | { | |
1739 | xsignal (error_symbol, list1 (arg)); | |
1740 | } | |
1741 | ||
1742 | void | |
1743 | xsignal2 (error_symbol, arg1, arg2) | |
1744 | Lisp_Object error_symbol, arg1, arg2; | |
1745 | { | |
1746 | xsignal (error_symbol, list2 (arg1, arg2)); | |
1747 | } | |
1748 | ||
1749 | void | |
1750 | xsignal3 (error_symbol, arg1, arg2, arg3) | |
1751 | Lisp_Object error_symbol, arg1, arg2, arg3; | |
1752 | { | |
1753 | xsignal (error_symbol, list3 (arg1, arg2, arg3)); | |
1754 | } | |
1755 | ||
1756 | /* Signal `error' with message S, and additional arg ARG. | |
1757 | If ARG is not a genuine list, make it a one-element list. */ | |
1758 | ||
1759 | void | |
1760 | signal_error (s, arg) | |
1761 | char *s; | |
1762 | Lisp_Object arg; | |
1763 | { | |
1764 | Lisp_Object tortoise, hare; | |
1765 | ||
1766 | hare = tortoise = arg; | |
1767 | while (CONSP (hare)) | |
1768 | { | |
1769 | hare = XCDR (hare); | |
1770 | if (!CONSP (hare)) | |
1771 | break; | |
1772 | ||
1773 | hare = XCDR (hare); | |
1774 | tortoise = XCDR (tortoise); | |
1775 | ||
1776 | if (EQ (hare, tortoise)) | |
1777 | break; | |
1778 | } | |
1779 | ||
1780 | if (!NILP (hare)) | |
1781 | arg = Fcons (arg, Qnil); /* Make it a list. */ | |
1782 | ||
1783 | xsignal (Qerror, Fcons (build_string (s), arg)); | |
1784 | } | |
1785 | ||
1786 | ||
128c0f66 RM |
1787 | /* Return nonzero iff LIST is a non-nil atom or |
1788 | a list containing one of CONDITIONS. */ | |
1789 | ||
1790 | static int | |
1791 | wants_debugger (list, conditions) | |
1792 | Lisp_Object list, conditions; | |
1793 | { | |
4de86b16 | 1794 | if (NILP (list)) |
128c0f66 RM |
1795 | return 0; |
1796 | if (! CONSP (list)) | |
1797 | return 1; | |
1798 | ||
ab67260b | 1799 | while (CONSP (conditions)) |
128c0f66 | 1800 | { |
ab67260b | 1801 | Lisp_Object this, tail; |
03699b14 KR |
1802 | this = XCAR (conditions); |
1803 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1804 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1805 | return 1; |
03699b14 | 1806 | conditions = XCDR (conditions); |
128c0f66 | 1807 | } |
ab67260b | 1808 | return 0; |
128c0f66 RM |
1809 | } |
1810 | ||
fc950e09 KH |
1811 | /* Return 1 if an error with condition-symbols CONDITIONS, |
1812 | and described by SIGNAL-DATA, should skip the debugger | |
1b1acc13 | 1813 | according to debugger-ignored-errors. */ |
fc950e09 KH |
1814 | |
1815 | static int | |
1816 | skip_debugger (conditions, data) | |
1817 | Lisp_Object conditions, data; | |
1818 | { | |
1819 | Lisp_Object tail; | |
1820 | int first_string = 1; | |
1821 | Lisp_Object error_message; | |
1822 | ||
17401c97 GM |
1823 | error_message = Qnil; |
1824 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1825 | { |
03699b14 | 1826 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1827 | { |
1828 | if (first_string) | |
1829 | { | |
1830 | error_message = Ferror_message_string (data); | |
1831 | first_string = 0; | |
1832 | } | |
177c0ea7 | 1833 | |
03699b14 | 1834 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1835 | return 1; |
1836 | } | |
1837 | else | |
1838 | { | |
1839 | Lisp_Object contail; | |
1840 | ||
17401c97 | 1841 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1842 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1843 | return 1; |
1844 | } | |
1845 | } | |
1846 | ||
1847 | return 0; | |
1848 | } | |
1849 | ||
128c0f66 | 1850 | /* Value of Qlambda means we have called debugger and user has continued. |
1ea9dec4 | 1851 | There are two ways to pass SIG and DATA: |
9b942ebd | 1852 | = SIG is the error symbol, and DATA is the rest of the data. |
1ea9dec4 | 1853 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). |
9b942ebd | 1854 | This is for memory-full errors only. |
1ea9dec4 | 1855 | |
9f5903bb RS |
1856 | Store value returned from debugger into *DEBUGGER_VALUE_PTR. |
1857 | ||
1858 | We need to increase max_specpdl_size temporarily around | |
1859 | anything we do that can push on the specpdl, so as not to get | |
1860 | a second error here in case we're handling specpdl overflow. */ | |
db9f0278 JB |
1861 | |
1862 | static Lisp_Object | |
1863 | find_handler_clause (handlers, conditions, sig, data, debugger_value_ptr) | |
1864 | Lisp_Object handlers, conditions, sig, data; | |
1865 | Lisp_Object *debugger_value_ptr; | |
1866 | { | |
1867 | register Lisp_Object h; | |
1868 | register Lisp_Object tem; | |
db9f0278 JB |
1869 | |
1870 | if (EQ (handlers, Qt)) /* t is used by handlers for all conditions, set up by C code. */ | |
1871 | return Qt; | |
61ede770 RS |
1872 | /* error is used similarly, but means print an error message |
1873 | and run the debugger if that is enabled. */ | |
1874 | if (EQ (handlers, Qerror) | |
57a6e758 RS |
1875 | || !NILP (Vdebug_on_signal)) /* This says call debugger even if |
1876 | there is a handler. */ | |
db9f0278 | 1877 | { |
61ede770 | 1878 | int debugger_called = 0; |
1ea9dec4 | 1879 | Lisp_Object sig_symbol, combined_data; |
9b942ebd RS |
1880 | /* This is set to 1 if we are handling a memory-full error, |
1881 | because these must not run the debugger. | |
1882 | (There is no room in memory to do that!) */ | |
1883 | int no_debugger = 0; | |
1ea9dec4 RS |
1884 | |
1885 | if (NILP (sig)) | |
1886 | { | |
1887 | combined_data = data; | |
1888 | sig_symbol = Fcar (data); | |
9b942ebd | 1889 | no_debugger = 1; |
1ea9dec4 RS |
1890 | } |
1891 | else | |
1892 | { | |
1893 | combined_data = Fcons (sig, data); | |
1894 | sig_symbol = sig; | |
1895 | } | |
61ede770 | 1896 | |
128c0f66 | 1897 | if (wants_debugger (Vstack_trace_on_error, conditions)) |
88817f3b | 1898 | { |
9f5903bb | 1899 | max_specpdl_size++; |
b369fa65 | 1900 | #ifdef PROTOTYPES |
88817f3b RS |
1901 | internal_with_output_to_temp_buffer ("*Backtrace*", |
1902 | (Lisp_Object (*) (Lisp_Object)) Fbacktrace, | |
1903 | Qnil); | |
1904 | #else | |
1905 | internal_with_output_to_temp_buffer ("*Backtrace*", | |
1906 | Fbacktrace, Qnil); | |
1907 | #endif | |
9f5903bb | 1908 | max_specpdl_size--; |
88817f3b | 1909 | } |
9b942ebd | 1910 | if (! no_debugger |
d799329b RS |
1911 | /* Don't try to run the debugger with interrupts blocked. |
1912 | The editing loop would return anyway. */ | |
1913 | && ! INPUT_BLOCKED_P | |
9b942ebd RS |
1914 | && (EQ (sig_symbol, Qquit) |
1915 | ? debug_on_quit | |
1916 | : wants_debugger (Vdebug_on_error, conditions)) | |
1ea9dec4 | 1917 | && ! skip_debugger (conditions, combined_data) |
be857679 | 1918 | && when_entered_debugger < num_nonmacro_input_events) |
db9f0278 | 1919 | { |
fc950e09 KH |
1920 | *debugger_value_ptr |
1921 | = call_debugger (Fcons (Qerror, | |
1ea9dec4 | 1922 | Fcons (combined_data, Qnil))); |
61ede770 RS |
1923 | debugger_called = 1; |
1924 | } | |
1925 | /* If there is no handler, return saying whether we ran the debugger. */ | |
1926 | if (EQ (handlers, Qerror)) | |
1927 | { | |
1928 | if (debugger_called) | |
9f5903bb | 1929 | return Qlambda; |
61ede770 | 1930 | return Qt; |
db9f0278 | 1931 | } |
db9f0278 JB |
1932 | } |
1933 | for (h = handlers; CONSP (h); h = Fcdr (h)) | |
1934 | { | |
5f96776a RS |
1935 | Lisp_Object handler, condit; |
1936 | ||
1937 | handler = Fcar (h); | |
1938 | if (!CONSP (handler)) | |
db9f0278 | 1939 | continue; |
5f96776a RS |
1940 | condit = Fcar (handler); |
1941 | /* Handle a single condition name in handler HANDLER. */ | |
1942 | if (SYMBOLP (condit)) | |
1943 | { | |
1944 | tem = Fmemq (Fcar (handler), conditions); | |
1945 | if (!NILP (tem)) | |
1946 | return handler; | |
1947 | } | |
1948 | /* Handle a list of condition names in handler HANDLER. */ | |
1949 | else if (CONSP (condit)) | |
1950 | { | |
1951 | while (CONSP (condit)) | |
1952 | { | |
1953 | tem = Fmemq (Fcar (condit), conditions); | |
1954 | if (!NILP (tem)) | |
1955 | return handler; | |
03699b14 | 1956 | condit = XCDR (condit); |
5f96776a RS |
1957 | } |
1958 | } | |
db9f0278 JB |
1959 | } |
1960 | return Qnil; | |
1961 | } | |
1962 | ||
1963 | /* dump an error message; called like printf */ | |
1964 | ||
1965 | /* VARARGS 1 */ | |
1966 | void | |
1967 | error (m, a1, a2, a3) | |
1968 | char *m; | |
9125da08 | 1969 | char *a1, *a2, *a3; |
db9f0278 JB |
1970 | { |
1971 | char buf[200]; | |
9125da08 RS |
1972 | int size = 200; |
1973 | int mlen; | |
1974 | char *buffer = buf; | |
1975 | char *args[3]; | |
1976 | int allocated = 0; | |
1977 | Lisp_Object string; | |
1978 | ||
1979 | args[0] = a1; | |
1980 | args[1] = a2; | |
1981 | args[2] = a3; | |
1982 | ||
1983 | mlen = strlen (m); | |
db9f0278 JB |
1984 | |
1985 | while (1) | |
9125da08 | 1986 | { |
955f3ff9 | 1987 | int used = doprnt (buffer, size, m, m + mlen, 3, args); |
9125da08 RS |
1988 | if (used < size) |
1989 | break; | |
1990 | size *= 2; | |
1991 | if (allocated) | |
1992 | buffer = (char *) xrealloc (buffer, size); | |
5ece1728 RS |
1993 | else |
1994 | { | |
1995 | buffer = (char *) xmalloc (size); | |
1996 | allocated = 1; | |
1997 | } | |
9125da08 RS |
1998 | } |
1999 | ||
955f3ff9 | 2000 | string = build_string (buffer); |
9125da08 | 2001 | if (allocated) |
9ae6734f | 2002 | xfree (buffer); |
9125da08 | 2003 | |
734d55a2 | 2004 | xsignal1 (Qerror, string); |
db9f0278 JB |
2005 | } |
2006 | \f | |
e72706be | 2007 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 2, 0, |
9dbc9081 PJ |
2008 | doc: /* Non-nil if FUNCTION makes provisions for interactive calling. |
2009 | This means it contains a description for how to read arguments to give it. | |
2010 | The value is nil for an invalid function or a symbol with no function | |
2011 | definition. | |
2012 | ||
2013 | Interactively callable functions include strings and vectors (treated | |
2014 | as keyboard macros), lambda-expressions that contain a top-level call | |
2015 | to `interactive', autoload definitions made by `autoload' with non-nil | |
2016 | fourth argument, and some of the built-in functions of Lisp. | |
2017 | ||
e72706be RS |
2018 | Also, a symbol satisfies `commandp' if its function definition does so. |
2019 | ||
2020 | If the optional argument FOR-CALL-INTERACTIVELY is non-nil, | |
769b4fb2 | 2021 | then strings and vectors are not accepted. */) |
e72706be RS |
2022 | (function, for_call_interactively) |
2023 | Lisp_Object function, for_call_interactively; | |
db9f0278 JB |
2024 | { |
2025 | register Lisp_Object fun; | |
2026 | register Lisp_Object funcar; | |
db9f0278 JB |
2027 | |
2028 | fun = function; | |
2029 | ||
ffd56f97 JB |
2030 | fun = indirect_function (fun); |
2031 | if (EQ (fun, Qunbound)) | |
2032 | return Qnil; | |
db9f0278 JB |
2033 | |
2034 | /* Emacs primitives are interactive if their DEFUN specifies an | |
2035 | interactive spec. */ | |
90165123 | 2036 | if (SUBRP (fun)) |
db9f0278 JB |
2037 | { |
2038 | if (XSUBR (fun)->prompt) | |
2039 | return Qt; | |
2040 | else | |
2041 | return Qnil; | |
2042 | } | |
2043 | ||
2044 | /* Bytecode objects are interactive if they are long enough to | |
2045 | have an element whose index is COMPILED_INTERACTIVE, which is | |
2046 | where the interactive spec is stored. */ | |
90165123 | 2047 | else if (COMPILEDP (fun)) |
845975f5 | 2048 | return ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
db9f0278 JB |
2049 | ? Qt : Qnil); |
2050 | ||
2051 | /* Strings and vectors are keyboard macros. */ | |
e72706be | 2052 | if (NILP (for_call_interactively) && (STRINGP (fun) || VECTORP (fun))) |
db9f0278 JB |
2053 | return Qt; |
2054 | ||
2055 | /* Lists may represent commands. */ | |
2056 | if (!CONSP (fun)) | |
2057 | return Qnil; | |
ed16fb98 | 2058 | funcar = XCAR (fun); |
db9f0278 | 2059 | if (EQ (funcar, Qlambda)) |
ed16fb98 | 2060 | return Fassq (Qinteractive, Fcdr (XCDR (fun))); |
db9f0278 | 2061 | if (EQ (funcar, Qautoload)) |
ed16fb98 | 2062 | return Fcar (Fcdr (Fcdr (XCDR (fun)))); |
db9f0278 JB |
2063 | else |
2064 | return Qnil; | |
2065 | } | |
2066 | ||
2067 | /* ARGSUSED */ | |
2068 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, | |
9dbc9081 PJ |
2069 | doc: /* Define FUNCTION to autoload from FILE. |
2070 | FUNCTION is a symbol; FILE is a file name string to pass to `load'. | |
2071 | Third arg DOCSTRING is documentation for the function. | |
2072 | Fourth arg INTERACTIVE if non-nil says function can be called interactively. | |
2073 | Fifth arg TYPE indicates the type of the object: | |
2074 | nil or omitted says FUNCTION is a function, | |
2075 | `keymap' says FUNCTION is really a keymap, and | |
2076 | `macro' or t says FUNCTION is really a macro. | |
2077 | Third through fifth args give info about the real definition. | |
2078 | They default to nil. | |
2079 | If FUNCTION is already defined other than as an autoload, | |
2080 | this does nothing and returns nil. */) | |
2081 | (function, file, docstring, interactive, type) | |
ee9ee63c | 2082 | Lisp_Object function, file, docstring, interactive, type; |
db9f0278 JB |
2083 | { |
2084 | #ifdef NO_ARG_ARRAY | |
2085 | Lisp_Object args[4]; | |
2086 | #endif | |
2087 | ||
b7826503 PJ |
2088 | CHECK_SYMBOL (function); |
2089 | CHECK_STRING (file); | |
db9f0278 JB |
2090 | |
2091 | /* If function is defined and not as an autoload, don't override */ | |
2092 | if (!EQ (XSYMBOL (function)->function, Qunbound) | |
90165123 | 2093 | && !(CONSP (XSYMBOL (function)->function) |
03699b14 | 2094 | && EQ (XCAR (XSYMBOL (function)->function), Qautoload))) |
db9f0278 JB |
2095 | return Qnil; |
2096 | ||
7973e637 SM |
2097 | if (NILP (Vpurify_flag)) |
2098 | /* Only add entries after dumping, because the ones before are | |
2099 | not useful and else we get loads of them from the loaddefs.el. */ | |
2100 | LOADHIST_ATTACH (Fcons (Qautoload, function)); | |
2101 | ||
db9f0278 JB |
2102 | #ifdef NO_ARG_ARRAY |
2103 | args[0] = file; | |
2104 | args[1] = docstring; | |
2105 | args[2] = interactive; | |
ee9ee63c | 2106 | args[3] = type; |
db9f0278 JB |
2107 | |
2108 | return Ffset (function, Fcons (Qautoload, Flist (4, &args[0]))); | |
2109 | #else /* NO_ARG_ARRAY */ | |
2110 | return Ffset (function, Fcons (Qautoload, Flist (4, &file))); | |
2111 | #endif /* not NO_ARG_ARRAY */ | |
2112 | } | |
2113 | ||
2114 | Lisp_Object | |
2115 | un_autoload (oldqueue) | |
2116 | Lisp_Object oldqueue; | |
2117 | { | |
2118 | register Lisp_Object queue, first, second; | |
2119 | ||
2120 | /* Queue to unwind is current value of Vautoload_queue. | |
2121 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
2122 | queue = Vautoload_queue; | |
2123 | Vautoload_queue = oldqueue; | |
2124 | while (CONSP (queue)) | |
2125 | { | |
e509f168 | 2126 | first = XCAR (queue); |
db9f0278 JB |
2127 | second = Fcdr (first); |
2128 | first = Fcar (first); | |
47b82df9 RS |
2129 | if (EQ (first, make_number (0))) |
2130 | Vfeatures = second; | |
db9f0278 JB |
2131 | else |
2132 | Ffset (first, second); | |
e509f168 | 2133 | queue = XCDR (queue); |
db9f0278 JB |
2134 | } |
2135 | return Qnil; | |
2136 | } | |
2137 | ||
ca20916b RS |
2138 | /* Load an autoloaded function. |
2139 | FUNNAME is the symbol which is the function's name. | |
2140 | FUNDEF is the autoload definition (a list). */ | |
2141 | ||
045ba794 | 2142 | void |
db9f0278 JB |
2143 | do_autoload (fundef, funname) |
2144 | Lisp_Object fundef, funname; | |
2145 | { | |
aed13378 | 2146 | int count = SPECPDL_INDEX (); |
cb81ac97 | 2147 | Lisp_Object fun, queue, first, second; |
ca20916b | 2148 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 | 2149 | |
aea6173f RS |
2150 | /* This is to make sure that loadup.el gives a clear picture |
2151 | of what files are preloaded and when. */ | |
ab4db096 RS |
2152 | if (! NILP (Vpurify_flag)) |
2153 | error ("Attempt to autoload %s while preparing to dump", | |
d5db4077 | 2154 | SDATA (SYMBOL_NAME (funname))); |
ab4db096 | 2155 | |
db9f0278 | 2156 | fun = funname; |
b7826503 | 2157 | CHECK_SYMBOL (funname); |
ca20916b | 2158 | GCPRO3 (fun, funname, fundef); |
db9f0278 | 2159 | |
f87740dc | 2160 | /* Preserve the match data. */ |
89f2614d | 2161 | record_unwind_save_match_data (); |
177c0ea7 | 2162 | |
f87740dc | 2163 | /* Value saved here is to be restored into Vautoload_queue. */ |
db9f0278 JB |
2164 | record_unwind_protect (un_autoload, Vautoload_queue); |
2165 | Vautoload_queue = Qt; | |
4aac2302 | 2166 | Fload (Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil, Qt); |
2a49b6e5 | 2167 | |
f87740dc | 2168 | /* Save the old autoloads, in case we ever do an unload. */ |
2a49b6e5 RS |
2169 | queue = Vautoload_queue; |
2170 | while (CONSP (queue)) | |
2171 | { | |
e509f168 | 2172 | first = XCAR (queue); |
2a49b6e5 RS |
2173 | second = Fcdr (first); |
2174 | first = Fcar (first); | |
5739ce6b | 2175 | |
fe5195e8 | 2176 | if (SYMBOLP (first) && CONSP (second) && EQ (XCAR (second), Qautoload)) |
e509f168 | 2177 | Fput (first, Qautoload, (XCDR (second))); |
5739ce6b | 2178 | |
e509f168 | 2179 | queue = XCDR (queue); |
2a49b6e5 RS |
2180 | } |
2181 | ||
db9f0278 JB |
2182 | /* Once loading finishes, don't undo it. */ |
2183 | Vautoload_queue = Qt; | |
2184 | unbind_to (count, Qnil); | |
2185 | ||
a7f96a35 | 2186 | fun = Findirect_function (fun, Qnil); |
ffd56f97 | 2187 | |
76c2b0cc | 2188 | if (!NILP (Fequal (fun, fundef))) |
db9f0278 | 2189 | error ("Autoloading failed to define function %s", |
d5db4077 | 2190 | SDATA (SYMBOL_NAME (funname))); |
ca20916b | 2191 | UNGCPRO; |
db9f0278 | 2192 | } |
4c576a83 | 2193 | |
db9f0278 JB |
2194 | \f |
2195 | DEFUN ("eval", Feval, Seval, 1, 1, 0, | |
9dbc9081 PJ |
2196 | doc: /* Evaluate FORM and return its value. */) |
2197 | (form) | |
db9f0278 JB |
2198 | Lisp_Object form; |
2199 | { | |
2200 | Lisp_Object fun, val, original_fun, original_args; | |
2201 | Lisp_Object funcar; | |
2202 | struct backtrace backtrace; | |
2203 | struct gcpro gcpro1, gcpro2, gcpro3; | |
2204 | ||
df470e3b | 2205 | if (handling_signal) |
48f8dfa3 | 2206 | abort (); |
177c0ea7 | 2207 | |
90165123 | 2208 | if (SYMBOLP (form)) |
2b9bde76 | 2209 | return Fsymbol_value (form); |
db9f0278 JB |
2210 | if (!CONSP (form)) |
2211 | return form; | |
2212 | ||
2213 | QUIT; | |
ee830945 RS |
2214 | if ((consing_since_gc > gc_cons_threshold |
2215 | && consing_since_gc > gc_relative_threshold) | |
2216 | || | |
2217 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
db9f0278 JB |
2218 | { |
2219 | GCPRO1 (form); | |
2220 | Fgarbage_collect (); | |
2221 | UNGCPRO; | |
2222 | } | |
2223 | ||
2224 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2225 | { | |
2226 | if (max_lisp_eval_depth < 100) | |
2227 | max_lisp_eval_depth = 100; | |
2228 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2229 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2230 | } |
2231 | ||
2232 | original_fun = Fcar (form); | |
2233 | original_args = Fcdr (form); | |
2234 | ||
2235 | backtrace.next = backtrace_list; | |
2236 | backtrace_list = &backtrace; | |
2237 | backtrace.function = &original_fun; /* This also protects them from gc */ | |
2238 | backtrace.args = &original_args; | |
2239 | backtrace.nargs = UNEVALLED; | |
2240 | backtrace.evalargs = 1; | |
2241 | backtrace.debug_on_exit = 0; | |
2242 | ||
2243 | if (debug_on_next_call) | |
2244 | do_debug_on_call (Qt); | |
2245 | ||
2246 | /* At this point, only original_fun and original_args | |
2247 | have values that will be used below */ | |
2248 | retry: | |
8788120f KS |
2249 | |
2250 | /* Optimize for no indirection. */ | |
2251 | fun = original_fun; | |
2252 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2253 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2254 | fun = indirect_function (fun); | |
db9f0278 | 2255 | |
90165123 | 2256 | if (SUBRP (fun)) |
db9f0278 JB |
2257 | { |
2258 | Lisp_Object numargs; | |
166c822d | 2259 | Lisp_Object argvals[8]; |
db9f0278 JB |
2260 | Lisp_Object args_left; |
2261 | register int i, maxargs; | |
2262 | ||
2263 | args_left = original_args; | |
2264 | numargs = Flength (args_left); | |
2265 | ||
c1788fbc RS |
2266 | CHECK_CONS_LIST (); |
2267 | ||
db9f0278 JB |
2268 | if (XINT (numargs) < XSUBR (fun)->min_args || |
2269 | (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < XINT (numargs))) | |
734d55a2 | 2270 | xsignal2 (Qwrong_number_of_arguments, original_fun, numargs); |
db9f0278 JB |
2271 | |
2272 | if (XSUBR (fun)->max_args == UNEVALLED) | |
2273 | { | |
2274 | backtrace.evalargs = 0; | |
2275 | val = (*XSUBR (fun)->function) (args_left); | |
2276 | goto done; | |
2277 | } | |
2278 | ||
2279 | if (XSUBR (fun)->max_args == MANY) | |
2280 | { | |
2281 | /* Pass a vector of evaluated arguments */ | |
2282 | Lisp_Object *vals; | |
2283 | register int argnum = 0; | |
2284 | ||
2285 | vals = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
2286 | ||
2287 | GCPRO3 (args_left, fun, fun); | |
2288 | gcpro3.var = vals; | |
2289 | gcpro3.nvars = 0; | |
2290 | ||
265a9e55 | 2291 | while (!NILP (args_left)) |
db9f0278 JB |
2292 | { |
2293 | vals[argnum++] = Feval (Fcar (args_left)); | |
2294 | args_left = Fcdr (args_left); | |
2295 | gcpro3.nvars = argnum; | |
2296 | } | |
db9f0278 JB |
2297 | |
2298 | backtrace.args = vals; | |
2299 | backtrace.nargs = XINT (numargs); | |
2300 | ||
2301 | val = (*XSUBR (fun)->function) (XINT (numargs), vals); | |
a6e3fa71 | 2302 | UNGCPRO; |
db9f0278 JB |
2303 | goto done; |
2304 | } | |
2305 | ||
2306 | GCPRO3 (args_left, fun, fun); | |
2307 | gcpro3.var = argvals; | |
2308 | gcpro3.nvars = 0; | |
2309 | ||
2310 | maxargs = XSUBR (fun)->max_args; | |
2311 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
2312 | { | |
2313 | argvals[i] = Feval (Fcar (args_left)); | |
2314 | gcpro3.nvars = ++i; | |
2315 | } | |
2316 | ||
2317 | UNGCPRO; | |
2318 | ||
2319 | backtrace.args = argvals; | |
2320 | backtrace.nargs = XINT (numargs); | |
2321 | ||
2322 | switch (i) | |
2323 | { | |
2324 | case 0: | |
2325 | val = (*XSUBR (fun)->function) (); | |
2326 | goto done; | |
2327 | case 1: | |
2328 | val = (*XSUBR (fun)->function) (argvals[0]); | |
2329 | goto done; | |
2330 | case 2: | |
2331 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1]); | |
2332 | goto done; | |
2333 | case 3: | |
2334 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2335 | argvals[2]); | |
2336 | goto done; | |
2337 | case 4: | |
2338 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], | |
2339 | argvals[2], argvals[3]); | |
2340 | goto done; | |
2341 | case 5: | |
2342 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2343 | argvals[3], argvals[4]); | |
2344 | goto done; | |
2345 | case 6: | |
2346 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2347 | argvals[3], argvals[4], argvals[5]); | |
2348 | goto done; | |
15c65264 RS |
2349 | case 7: |
2350 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2351 | argvals[3], argvals[4], argvals[5], | |
2352 | argvals[6]); | |
2353 | goto done; | |
db9f0278 | 2354 | |
166c822d KH |
2355 | case 8: |
2356 | val = (*XSUBR (fun)->function) (argvals[0], argvals[1], argvals[2], | |
2357 | argvals[3], argvals[4], argvals[5], | |
2358 | argvals[6], argvals[7]); | |
2359 | goto done; | |
2360 | ||
db9f0278 | 2361 | default: |
08564963 JB |
2362 | /* Someone has created a subr that takes more arguments than |
2363 | is supported by this code. We need to either rewrite the | |
2364 | subr to use a different argument protocol, or add more | |
2365 | cases to this switch. */ | |
2366 | abort (); | |
db9f0278 JB |
2367 | } |
2368 | } | |
90165123 | 2369 | if (COMPILEDP (fun)) |
db9f0278 JB |
2370 | val = apply_lambda (fun, original_args, 1); |
2371 | else | |
2372 | { | |
8788120f | 2373 | if (EQ (fun, Qunbound)) |
734d55a2 | 2374 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 2375 | if (!CONSP (fun)) |
734d55a2 KS |
2376 | xsignal1 (Qinvalid_function, original_fun); |
2377 | funcar = XCAR (fun); | |
90165123 | 2378 | if (!SYMBOLP (funcar)) |
734d55a2 | 2379 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2380 | if (EQ (funcar, Qautoload)) |
2381 | { | |
2382 | do_autoload (fun, original_fun); | |
2383 | goto retry; | |
2384 | } | |
2385 | if (EQ (funcar, Qmacro)) | |
2386 | val = Feval (apply1 (Fcdr (fun), original_args)); | |
2387 | else if (EQ (funcar, Qlambda)) | |
2388 | val = apply_lambda (fun, original_args, 1); | |
db9f0278 | 2389 | else |
734d55a2 | 2390 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2391 | } |
2392 | done: | |
c1788fbc RS |
2393 | CHECK_CONS_LIST (); |
2394 | ||
db9f0278 JB |
2395 | lisp_eval_depth--; |
2396 | if (backtrace.debug_on_exit) | |
2397 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
2398 | backtrace_list = backtrace.next; | |
824eb35e | 2399 | |
db9f0278 JB |
2400 | return val; |
2401 | } | |
2402 | \f | |
2403 | DEFUN ("apply", Fapply, Sapply, 2, MANY, 0, | |
9dbc9081 PJ |
2404 | doc: /* Call FUNCTION with our remaining args, using our last arg as list of args. |
2405 | Then return the value FUNCTION returns. | |
2406 | Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
2407 | usage: (apply FUNCTION &rest ARGUMENTS) */) | |
2408 | (nargs, args) | |
db9f0278 JB |
2409 | int nargs; |
2410 | Lisp_Object *args; | |
2411 | { | |
2412 | register int i, numargs; | |
2413 | register Lisp_Object spread_arg; | |
2414 | register Lisp_Object *funcall_args; | |
db9f0278 | 2415 | Lisp_Object fun; |
96d44c64 | 2416 | struct gcpro gcpro1; |
db9f0278 JB |
2417 | |
2418 | fun = args [0]; | |
2419 | funcall_args = 0; | |
2420 | spread_arg = args [nargs - 1]; | |
b7826503 | 2421 | CHECK_LIST (spread_arg); |
177c0ea7 | 2422 | |
db9f0278 JB |
2423 | numargs = XINT (Flength (spread_arg)); |
2424 | ||
2425 | if (numargs == 0) | |
2426 | return Ffuncall (nargs - 1, args); | |
2427 | else if (numargs == 1) | |
2428 | { | |
03699b14 | 2429 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2430 | return Ffuncall (nargs, args); |
2431 | } | |
2432 | ||
a6e3fa71 | 2433 | numargs += nargs - 2; |
db9f0278 | 2434 | |
8788120f KS |
2435 | /* Optimize for no indirection. */ |
2436 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2437 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2438 | fun = indirect_function (fun); | |
ffd56f97 | 2439 | if (EQ (fun, Qunbound)) |
db9f0278 | 2440 | { |
ffd56f97 JB |
2441 | /* Let funcall get the error */ |
2442 | fun = args[0]; | |
2443 | goto funcall; | |
db9f0278 JB |
2444 | } |
2445 | ||
90165123 | 2446 | if (SUBRP (fun)) |
db9f0278 JB |
2447 | { |
2448 | if (numargs < XSUBR (fun)->min_args | |
2449 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
2450 | goto funcall; /* Let funcall get the error */ | |
2451 | else if (XSUBR (fun)->max_args > numargs) | |
2452 | { | |
2453 | /* Avoid making funcall cons up a yet another new vector of arguments | |
2454 | by explicitly supplying nil's for optional values */ | |
2455 | funcall_args = (Lisp_Object *) alloca ((1 + XSUBR (fun)->max_args) | |
2456 | * sizeof (Lisp_Object)); | |
2457 | for (i = numargs; i < XSUBR (fun)->max_args;) | |
2458 | funcall_args[++i] = Qnil; | |
96d44c64 SM |
2459 | GCPRO1 (*funcall_args); |
2460 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2461 | } |
2462 | } | |
2463 | funcall: | |
2464 | /* We add 1 to numargs because funcall_args includes the | |
2465 | function itself as well as its arguments. */ | |
2466 | if (!funcall_args) | |
a6e3fa71 JB |
2467 | { |
2468 | funcall_args = (Lisp_Object *) alloca ((1 + numargs) | |
2469 | * sizeof (Lisp_Object)); | |
96d44c64 SM |
2470 | GCPRO1 (*funcall_args); |
2471 | gcpro1.nvars = 1 + numargs; | |
a6e3fa71 JB |
2472 | } |
2473 | ||
db9f0278 JB |
2474 | bcopy (args, funcall_args, nargs * sizeof (Lisp_Object)); |
2475 | /* Spread the last arg we got. Its first element goes in | |
2476 | the slot that it used to occupy, hence this value of I. */ | |
2477 | i = nargs - 1; | |
265a9e55 | 2478 | while (!NILP (spread_arg)) |
db9f0278 | 2479 | { |
03699b14 KR |
2480 | funcall_args [i++] = XCAR (spread_arg); |
2481 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2482 | } |
a6e3fa71 | 2483 | |
96d44c64 SM |
2484 | /* By convention, the caller needs to gcpro Ffuncall's args. */ |
2485 | RETURN_UNGCPRO (Ffuncall (gcpro1.nvars, funcall_args)); | |
db9f0278 JB |
2486 | } |
2487 | \f | |
ff936e53 SM |
2488 | /* Run hook variables in various ways. */ |
2489 | ||
2490 | enum run_hooks_condition {to_completion, until_success, until_failure}; | |
2901f1d1 SM |
2491 | static Lisp_Object run_hook_with_args P_ ((int, Lisp_Object *, |
2492 | enum run_hooks_condition)); | |
ff936e53 | 2493 | |
8b5176cd | 2494 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
9f685258 | 2495 | doc: /* Run each hook in HOOKS. |
9dbc9081 PJ |
2496 | Each argument should be a symbol, a hook variable. |
2497 | These symbols are processed in the order specified. | |
2498 | If a hook symbol has a non-nil value, that value may be a function | |
2499 | or a list of functions to be called to run the hook. | |
2500 | If the value is a function, it is called with no arguments. | |
2501 | If it is a list, the elements are called, in order, with no arguments. | |
2502 | ||
9f685258 LK |
2503 | Major modes should not use this function directly to run their mode |
2504 | hook; they should use `run-mode-hooks' instead. | |
2505 | ||
72e85d5d RS |
2506 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2507 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2508 | usage: (run-hooks &rest HOOKS) */) |
2509 | (nargs, args) | |
ff936e53 SM |
2510 | int nargs; |
2511 | Lisp_Object *args; | |
2512 | { | |
2513 | Lisp_Object hook[1]; | |
2514 | register int i; | |
2515 | ||
2516 | for (i = 0; i < nargs; i++) | |
2517 | { | |
2518 | hook[0] = args[i]; | |
2519 | run_hook_with_args (1, hook, to_completion); | |
2520 | } | |
2521 | ||
2522 | return Qnil; | |
2523 | } | |
177c0ea7 | 2524 | |
a0d76c27 | 2525 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
9dbc9081 PJ |
2526 | Srun_hook_with_args, 1, MANY, 0, |
2527 | doc: /* Run HOOK with the specified arguments ARGS. | |
2528 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
2529 | value, that value may be a function or a list of functions to be | |
2530 | called to run the hook. If the value is a function, it is called with | |
2531 | the given arguments and its return value is returned. If it is a list | |
2532 | of functions, those functions are called, in order, | |
2533 | with the given arguments ARGS. | |
d5e2c90c | 2534 | It is best not to depend on the value returned by `run-hook-with-args', |
9dbc9081 PJ |
2535 | as that may change. |
2536 | ||
72e85d5d RS |
2537 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2538 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2539 | usage: (run-hook-with-args HOOK &rest ARGS) */) |
2540 | (nargs, args) | |
ff936e53 SM |
2541 | int nargs; |
2542 | Lisp_Object *args; | |
2543 | { | |
2544 | return run_hook_with_args (nargs, args, to_completion); | |
2545 | } | |
2546 | ||
a0d76c27 | 2547 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
9dbc9081 PJ |
2548 | Srun_hook_with_args_until_success, 1, MANY, 0, |
2549 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2550 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2551 | value, that value may be a function or a list of functions to be | |
2552 | called to run the hook. If the value is a function, it is called with | |
2553 | the given arguments and its return value is returned. | |
2554 | If it is a list of functions, those functions are called, in order, | |
2555 | with the given arguments ARGS, until one of them | |
9dbc9081 | 2556 | returns a non-nil value. Then we return that value. |
d5e2c90c | 2557 | However, if they all return nil, we return nil. |
9dbc9081 | 2558 | |
72e85d5d RS |
2559 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2560 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2561 | usage: (run-hook-with-args-until-success HOOK &rest ARGS) */) |
2562 | (nargs, args) | |
b0b667cb KH |
2563 | int nargs; |
2564 | Lisp_Object *args; | |
2565 | { | |
ff936e53 SM |
2566 | return run_hook_with_args (nargs, args, until_success); |
2567 | } | |
2568 | ||
a0d76c27 | 2569 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
9dbc9081 PJ |
2570 | Srun_hook_with_args_until_failure, 1, MANY, 0, |
2571 | doc: /* Run HOOK with the specified arguments ARGS. | |
d5e2c90c RS |
2572 | HOOK should be a symbol, a hook variable. If HOOK has a non-nil |
2573 | value, that value may be a function or a list of functions to be | |
2574 | called to run the hook. If the value is a function, it is called with | |
2575 | the given arguments and its return value is returned. | |
2576 | If it is a list of functions, those functions are called, in order, | |
2577 | with the given arguments ARGS, until one of them returns nil. | |
2578 | Then we return nil. However, if they all return non-nil, we return non-nil. | |
9dbc9081 | 2579 | |
72e85d5d RS |
2580 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2581 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 PJ |
2582 | usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */) |
2583 | (nargs, args) | |
ff936e53 SM |
2584 | int nargs; |
2585 | Lisp_Object *args; | |
2586 | { | |
2587 | return run_hook_with_args (nargs, args, until_failure); | |
2588 | } | |
2589 | ||
c933ea05 RS |
2590 | /* ARGS[0] should be a hook symbol. |
2591 | Call each of the functions in the hook value, passing each of them | |
2592 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
2593 | COND specifies a condition to test after each call | |
2594 | to decide whether to stop. | |
2595 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2596 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2597 | ||
2901f1d1 | 2598 | static Lisp_Object |
ff936e53 SM |
2599 | run_hook_with_args (nargs, args, cond) |
2600 | int nargs; | |
2601 | Lisp_Object *args; | |
2602 | enum run_hooks_condition cond; | |
2603 | { | |
2604 | Lisp_Object sym, val, ret; | |
fada05d6 KH |
2605 | Lisp_Object globals; |
2606 | struct gcpro gcpro1, gcpro2, gcpro3; | |
b0b667cb | 2607 | |
f029ca5f RS |
2608 | /* If we are dying or still initializing, |
2609 | don't do anything--it would probably crash if we tried. */ | |
2610 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2611 | return Qnil; |
f029ca5f | 2612 | |
b0b667cb | 2613 | sym = args[0]; |
aa681b51 | 2614 | val = find_symbol_value (sym); |
ff936e53 SM |
2615 | ret = (cond == until_failure ? Qt : Qnil); |
2616 | ||
b0b667cb | 2617 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2618 | return ret; |
03699b14 | 2619 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2620 | { |
2621 | args[0] = val; | |
2622 | return Ffuncall (nargs, args); | |
2623 | } | |
2624 | else | |
2625 | { | |
fada05d6 KH |
2626 | globals = Qnil; |
2627 | GCPRO3 (sym, val, globals); | |
cb9d21f8 | 2628 | |
ff936e53 SM |
2629 | for (; |
2630 | CONSP (val) && ((cond == to_completion) | |
2631 | || (cond == until_success ? NILP (ret) | |
2632 | : !NILP (ret))); | |
03699b14 | 2633 | val = XCDR (val)) |
b0b667cb | 2634 | { |
03699b14 | 2635 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2636 | { |
2637 | /* t indicates this hook has a local binding; | |
2638 | it means to run the global binding too. */ | |
b0b667cb | 2639 | |
ff936e53 SM |
2640 | for (globals = Fdefault_value (sym); |
2641 | CONSP (globals) && ((cond == to_completion) | |
2642 | || (cond == until_success ? NILP (ret) | |
2643 | : !NILP (ret))); | |
03699b14 | 2644 | globals = XCDR (globals)) |
b0b667cb | 2645 | { |
03699b14 | 2646 | args[0] = XCAR (globals); |
77d92e05 RS |
2647 | /* In a global value, t should not occur. If it does, we |
2648 | must ignore it to avoid an endless loop. */ | |
2649 | if (!EQ (args[0], Qt)) | |
2650 | ret = Ffuncall (nargs, args); | |
b0b667cb KH |
2651 | } |
2652 | } | |
2653 | else | |
2654 | { | |
03699b14 | 2655 | args[0] = XCAR (val); |
ff936e53 | 2656 | ret = Ffuncall (nargs, args); |
b0b667cb KH |
2657 | } |
2658 | } | |
cb9d21f8 RS |
2659 | |
2660 | UNGCPRO; | |
ff936e53 | 2661 | return ret; |
b0b667cb KH |
2662 | } |
2663 | } | |
c933ea05 RS |
2664 | |
2665 | /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
2666 | present value of that symbol. | |
2667 | Call each element of FUNLIST, | |
2668 | passing each of them the rest of ARGS. | |
2669 | The caller (or its caller, etc) must gcpro all of ARGS, | |
2670 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2671 | ||
2672 | Lisp_Object | |
2673 | run_hook_list_with_args (funlist, nargs, args) | |
2674 | Lisp_Object funlist; | |
2675 | int nargs; | |
2676 | Lisp_Object *args; | |
2677 | { | |
2678 | Lisp_Object sym; | |
2679 | Lisp_Object val; | |
fada05d6 KH |
2680 | Lisp_Object globals; |
2681 | struct gcpro gcpro1, gcpro2, gcpro3; | |
c933ea05 RS |
2682 | |
2683 | sym = args[0]; | |
fada05d6 KH |
2684 | globals = Qnil; |
2685 | GCPRO3 (sym, val, globals); | |
c933ea05 | 2686 | |
03699b14 | 2687 | for (val = funlist; CONSP (val); val = XCDR (val)) |
c933ea05 | 2688 | { |
03699b14 | 2689 | if (EQ (XCAR (val), Qt)) |
c933ea05 RS |
2690 | { |
2691 | /* t indicates this hook has a local binding; | |
2692 | it means to run the global binding too. */ | |
c933ea05 RS |
2693 | |
2694 | for (globals = Fdefault_value (sym); | |
2695 | CONSP (globals); | |
03699b14 | 2696 | globals = XCDR (globals)) |
c933ea05 | 2697 | { |
03699b14 | 2698 | args[0] = XCAR (globals); |
77d92e05 RS |
2699 | /* In a global value, t should not occur. If it does, we |
2700 | must ignore it to avoid an endless loop. */ | |
2701 | if (!EQ (args[0], Qt)) | |
2702 | Ffuncall (nargs, args); | |
c933ea05 RS |
2703 | } |
2704 | } | |
2705 | else | |
2706 | { | |
03699b14 | 2707 | args[0] = XCAR (val); |
c933ea05 RS |
2708 | Ffuncall (nargs, args); |
2709 | } | |
2710 | } | |
2711 | UNGCPRO; | |
2712 | return Qnil; | |
2713 | } | |
7d48558f RS |
2714 | |
2715 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ | |
2716 | ||
2717 | void | |
2718 | run_hook_with_args_2 (hook, arg1, arg2) | |
2719 | Lisp_Object hook, arg1, arg2; | |
2720 | { | |
2721 | Lisp_Object temp[3]; | |
2722 | temp[0] = hook; | |
2723 | temp[1] = arg1; | |
2724 | temp[2] = arg2; | |
2725 | ||
2726 | Frun_hook_with_args (3, temp); | |
2727 | } | |
ff936e53 | 2728 | \f |
db9f0278 JB |
2729 | /* Apply fn to arg */ |
2730 | Lisp_Object | |
2731 | apply1 (fn, arg) | |
2732 | Lisp_Object fn, arg; | |
2733 | { | |
a6e3fa71 JB |
2734 | struct gcpro gcpro1; |
2735 | ||
2736 | GCPRO1 (fn); | |
265a9e55 | 2737 | if (NILP (arg)) |
a6e3fa71 JB |
2738 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2739 | gcpro1.nvars = 2; | |
db9f0278 JB |
2740 | #ifdef NO_ARG_ARRAY |
2741 | { | |
2742 | Lisp_Object args[2]; | |
2743 | args[0] = fn; | |
2744 | args[1] = arg; | |
a6e3fa71 JB |
2745 | gcpro1.var = args; |
2746 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 JB |
2747 | } |
2748 | #else /* not NO_ARG_ARRAY */ | |
a6e3fa71 | 2749 | RETURN_UNGCPRO (Fapply (2, &fn)); |
db9f0278 JB |
2750 | #endif /* not NO_ARG_ARRAY */ |
2751 | } | |
2752 | ||
2753 | /* Call function fn on no arguments */ | |
2754 | Lisp_Object | |
2755 | call0 (fn) | |
2756 | Lisp_Object fn; | |
2757 | { | |
a6e3fa71 JB |
2758 | struct gcpro gcpro1; |
2759 | ||
2760 | GCPRO1 (fn); | |
2761 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2762 | } |
2763 | ||
15285f9f | 2764 | /* Call function fn with 1 argument arg1 */ |
db9f0278 JB |
2765 | /* ARGSUSED */ |
2766 | Lisp_Object | |
15285f9f RS |
2767 | call1 (fn, arg1) |
2768 | Lisp_Object fn, arg1; | |
db9f0278 | 2769 | { |
a6e3fa71 | 2770 | struct gcpro gcpro1; |
db9f0278 | 2771 | #ifdef NO_ARG_ARRAY |
177c0ea7 | 2772 | Lisp_Object args[2]; |
a6e3fa71 | 2773 | |
db9f0278 | 2774 | args[0] = fn; |
15285f9f | 2775 | args[1] = arg1; |
a6e3fa71 JB |
2776 | GCPRO1 (args[0]); |
2777 | gcpro1.nvars = 2; | |
2778 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 | 2779 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2780 | GCPRO1 (fn); |
2781 | gcpro1.nvars = 2; | |
2782 | RETURN_UNGCPRO (Ffuncall (2, &fn)); | |
db9f0278 JB |
2783 | #endif /* not NO_ARG_ARRAY */ |
2784 | } | |
2785 | ||
15285f9f | 2786 | /* Call function fn with 2 arguments arg1, arg2 */ |
db9f0278 JB |
2787 | /* ARGSUSED */ |
2788 | Lisp_Object | |
15285f9f RS |
2789 | call2 (fn, arg1, arg2) |
2790 | Lisp_Object fn, arg1, arg2; | |
db9f0278 | 2791 | { |
a6e3fa71 | 2792 | struct gcpro gcpro1; |
db9f0278 JB |
2793 | #ifdef NO_ARG_ARRAY |
2794 | Lisp_Object args[3]; | |
2795 | args[0] = fn; | |
15285f9f RS |
2796 | args[1] = arg1; |
2797 | args[2] = arg2; | |
a6e3fa71 JB |
2798 | GCPRO1 (args[0]); |
2799 | gcpro1.nvars = 3; | |
2800 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 | 2801 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2802 | GCPRO1 (fn); |
2803 | gcpro1.nvars = 3; | |
2804 | RETURN_UNGCPRO (Ffuncall (3, &fn)); | |
db9f0278 JB |
2805 | #endif /* not NO_ARG_ARRAY */ |
2806 | } | |
2807 | ||
15285f9f | 2808 | /* Call function fn with 3 arguments arg1, arg2, arg3 */ |
db9f0278 JB |
2809 | /* ARGSUSED */ |
2810 | Lisp_Object | |
15285f9f RS |
2811 | call3 (fn, arg1, arg2, arg3) |
2812 | Lisp_Object fn, arg1, arg2, arg3; | |
db9f0278 | 2813 | { |
a6e3fa71 | 2814 | struct gcpro gcpro1; |
db9f0278 JB |
2815 | #ifdef NO_ARG_ARRAY |
2816 | Lisp_Object args[4]; | |
2817 | args[0] = fn; | |
15285f9f RS |
2818 | args[1] = arg1; |
2819 | args[2] = arg2; | |
2820 | args[3] = arg3; | |
a6e3fa71 JB |
2821 | GCPRO1 (args[0]); |
2822 | gcpro1.nvars = 4; | |
2823 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 | 2824 | #else /* not NO_ARG_ARRAY */ |
a6e3fa71 JB |
2825 | GCPRO1 (fn); |
2826 | gcpro1.nvars = 4; | |
2827 | RETURN_UNGCPRO (Ffuncall (4, &fn)); | |
db9f0278 JB |
2828 | #endif /* not NO_ARG_ARRAY */ |
2829 | } | |
2830 | ||
15285f9f | 2831 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */ |
a5a44b91 JB |
2832 | /* ARGSUSED */ |
2833 | Lisp_Object | |
15285f9f RS |
2834 | call4 (fn, arg1, arg2, arg3, arg4) |
2835 | Lisp_Object fn, arg1, arg2, arg3, arg4; | |
a5a44b91 JB |
2836 | { |
2837 | struct gcpro gcpro1; | |
2838 | #ifdef NO_ARG_ARRAY | |
2839 | Lisp_Object args[5]; | |
2840 | args[0] = fn; | |
15285f9f RS |
2841 | args[1] = arg1; |
2842 | args[2] = arg2; | |
2843 | args[3] = arg3; | |
2844 | args[4] = arg4; | |
a5a44b91 JB |
2845 | GCPRO1 (args[0]); |
2846 | gcpro1.nvars = 5; | |
2847 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
2848 | #else /* not NO_ARG_ARRAY */ | |
2849 | GCPRO1 (fn); | |
2850 | gcpro1.nvars = 5; | |
2851 | RETURN_UNGCPRO (Ffuncall (5, &fn)); | |
2852 | #endif /* not NO_ARG_ARRAY */ | |
2853 | } | |
2854 | ||
15285f9f RS |
2855 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */ |
2856 | /* ARGSUSED */ | |
2857 | Lisp_Object | |
2858 | call5 (fn, arg1, arg2, arg3, arg4, arg5) | |
2859 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5; | |
2860 | { | |
2861 | struct gcpro gcpro1; | |
2862 | #ifdef NO_ARG_ARRAY | |
2863 | Lisp_Object args[6]; | |
2864 | args[0] = fn; | |
2865 | args[1] = arg1; | |
2866 | args[2] = arg2; | |
2867 | args[3] = arg3; | |
2868 | args[4] = arg4; | |
2869 | args[5] = arg5; | |
2870 | GCPRO1 (args[0]); | |
2871 | gcpro1.nvars = 6; | |
2872 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
2873 | #else /* not NO_ARG_ARRAY */ | |
2874 | GCPRO1 (fn); | |
2875 | gcpro1.nvars = 6; | |
2876 | RETURN_UNGCPRO (Ffuncall (6, &fn)); | |
2877 | #endif /* not NO_ARG_ARRAY */ | |
2878 | } | |
2879 | ||
2880 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */ | |
2881 | /* ARGSUSED */ | |
2882 | Lisp_Object | |
2883 | call6 (fn, arg1, arg2, arg3, arg4, arg5, arg6) | |
2884 | Lisp_Object fn, arg1, arg2, arg3, arg4, arg5, arg6; | |
2885 | { | |
2886 | struct gcpro gcpro1; | |
2887 | #ifdef NO_ARG_ARRAY | |
2888 | Lisp_Object args[7]; | |
2889 | args[0] = fn; | |
2890 | args[1] = arg1; | |
2891 | args[2] = arg2; | |
2892 | args[3] = arg3; | |
2893 | args[4] = arg4; | |
2894 | args[5] = arg5; | |
2895 | args[6] = arg6; | |
2896 | GCPRO1 (args[0]); | |
2897 | gcpro1.nvars = 7; | |
2898 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
2899 | #else /* not NO_ARG_ARRAY */ | |
2900 | GCPRO1 (fn); | |
2901 | gcpro1.nvars = 7; | |
2902 | RETURN_UNGCPRO (Ffuncall (7, &fn)); | |
2903 | #endif /* not NO_ARG_ARRAY */ | |
2904 | } | |
2905 | ||
6c2ef893 RS |
2906 | /* The caller should GCPRO all the elements of ARGS. */ |
2907 | ||
db9f0278 | 2908 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
9dbc9081 PJ |
2909 | doc: /* Call first argument as a function, passing remaining arguments to it. |
2910 | Return the value that function returns. | |
2911 | Thus, (funcall 'cons 'x 'y) returns (x . y). | |
2912 | usage: (funcall FUNCTION &rest ARGUMENTS) */) | |
2913 | (nargs, args) | |
db9f0278 JB |
2914 | int nargs; |
2915 | Lisp_Object *args; | |
2916 | { | |
8788120f | 2917 | Lisp_Object fun, original_fun; |
db9f0278 JB |
2918 | Lisp_Object funcar; |
2919 | int numargs = nargs - 1; | |
2920 | Lisp_Object lisp_numargs; | |
2921 | Lisp_Object val; | |
2922 | struct backtrace backtrace; | |
2923 | register Lisp_Object *internal_args; | |
2924 | register int i; | |
2925 | ||
2926 | QUIT; | |
ee830945 RS |
2927 | if ((consing_since_gc > gc_cons_threshold |
2928 | && consing_since_gc > gc_relative_threshold) | |
2929 | || | |
2930 | (!NILP (Vmemory_full) && consing_since_gc > memory_full_cons_threshold)) | |
a6e3fa71 | 2931 | Fgarbage_collect (); |
db9f0278 JB |
2932 | |
2933 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2934 | { | |
2935 | if (max_lisp_eval_depth < 100) | |
2936 | max_lisp_eval_depth = 100; | |
2937 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2938 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2939 | } |
2940 | ||
2941 | backtrace.next = backtrace_list; | |
2942 | backtrace_list = &backtrace; | |
2943 | backtrace.function = &args[0]; | |
2944 | backtrace.args = &args[1]; | |
2945 | backtrace.nargs = nargs - 1; | |
2946 | backtrace.evalargs = 0; | |
2947 | backtrace.debug_on_exit = 0; | |
2948 | ||
2949 | if (debug_on_next_call) | |
2950 | do_debug_on_call (Qlambda); | |
2951 | ||
fff3ff9c KS |
2952 | CHECK_CONS_LIST (); |
2953 | ||
8788120f KS |
2954 | original_fun = args[0]; |
2955 | ||
db9f0278 JB |
2956 | retry: |
2957 | ||
8788120f KS |
2958 | /* Optimize for no indirection. */ |
2959 | fun = original_fun; | |
2960 | if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
2961 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
2962 | fun = indirect_function (fun); | |
db9f0278 | 2963 | |
90165123 | 2964 | if (SUBRP (fun)) |
db9f0278 | 2965 | { |
fff3ff9c | 2966 | if (numargs < XSUBR (fun)->min_args |
db9f0278 JB |
2967 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) |
2968 | { | |
a631e24c | 2969 | XSETFASTINT (lisp_numargs, numargs); |
734d55a2 | 2970 | xsignal2 (Qwrong_number_of_arguments, original_fun, lisp_numargs); |
db9f0278 JB |
2971 | } |
2972 | ||
2973 | if (XSUBR (fun)->max_args == UNEVALLED) | |
734d55a2 | 2974 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2975 | |
2976 | if (XSUBR (fun)->max_args == MANY) | |
2977 | { | |
2978 | val = (*XSUBR (fun)->function) (numargs, args + 1); | |
2979 | goto done; | |
2980 | } | |
2981 | ||
2982 | if (XSUBR (fun)->max_args > numargs) | |
2983 | { | |
2984 | internal_args = (Lisp_Object *) alloca (XSUBR (fun)->max_args * sizeof (Lisp_Object)); | |
2985 | bcopy (args + 1, internal_args, numargs * sizeof (Lisp_Object)); | |
2986 | for (i = numargs; i < XSUBR (fun)->max_args; i++) | |
2987 | internal_args[i] = Qnil; | |
2988 | } | |
2989 | else | |
2990 | internal_args = args + 1; | |
2991 | switch (XSUBR (fun)->max_args) | |
2992 | { | |
2993 | case 0: | |
2994 | val = (*XSUBR (fun)->function) (); | |
2995 | goto done; | |
2996 | case 1: | |
2997 | val = (*XSUBR (fun)->function) (internal_args[0]); | |
2998 | goto done; | |
2999 | case 2: | |
82fc29a1 | 3000 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1]); |
db9f0278 JB |
3001 | goto done; |
3002 | case 3: | |
3003 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3004 | internal_args[2]); | |
3005 | goto done; | |
3006 | case 4: | |
3007 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
82fc29a1 | 3008 | internal_args[2], internal_args[3]); |
db9f0278 JB |
3009 | goto done; |
3010 | case 5: | |
3011 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3012 | internal_args[2], internal_args[3], | |
3013 | internal_args[4]); | |
3014 | goto done; | |
3015 | case 6: | |
3016 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3017 | internal_args[2], internal_args[3], | |
3018 | internal_args[4], internal_args[5]); | |
3019 | goto done; | |
15c65264 RS |
3020 | case 7: |
3021 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3022 | internal_args[2], internal_args[3], | |
3023 | internal_args[4], internal_args[5], | |
3024 | internal_args[6]); | |
3025 | goto done; | |
db9f0278 | 3026 | |
166c822d KH |
3027 | case 8: |
3028 | val = (*XSUBR (fun)->function) (internal_args[0], internal_args[1], | |
3029 | internal_args[2], internal_args[3], | |
3030 | internal_args[4], internal_args[5], | |
3031 | internal_args[6], internal_args[7]); | |
3032 | goto done; | |
3033 | ||
db9f0278 | 3034 | default: |
70ee42f7 | 3035 | |
166c822d | 3036 | /* If a subr takes more than 8 arguments without using MANY |
177c0ea7 | 3037 | or UNEVALLED, we need to extend this function to support it. |
70ee42f7 JB |
3038 | Until this is done, there is no way to call the function. */ |
3039 | abort (); | |
db9f0278 JB |
3040 | } |
3041 | } | |
90165123 | 3042 | if (COMPILEDP (fun)) |
db9f0278 JB |
3043 | val = funcall_lambda (fun, numargs, args + 1); |
3044 | else | |
3045 | { | |
8788120f | 3046 | if (EQ (fun, Qunbound)) |
734d55a2 | 3047 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 3048 | if (!CONSP (fun)) |
734d55a2 KS |
3049 | xsignal1 (Qinvalid_function, original_fun); |
3050 | funcar = XCAR (fun); | |
90165123 | 3051 | if (!SYMBOLP (funcar)) |
734d55a2 | 3052 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3053 | if (EQ (funcar, Qlambda)) |
3054 | val = funcall_lambda (fun, numargs, args + 1); | |
db9f0278 JB |
3055 | else if (EQ (funcar, Qautoload)) |
3056 | { | |
8788120f | 3057 | do_autoload (fun, original_fun); |
fff3ff9c | 3058 | CHECK_CONS_LIST (); |
db9f0278 JB |
3059 | goto retry; |
3060 | } | |
3061 | else | |
734d55a2 | 3062 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
3063 | } |
3064 | done: | |
c1788fbc | 3065 | CHECK_CONS_LIST (); |
db9f0278 JB |
3066 | lisp_eval_depth--; |
3067 | if (backtrace.debug_on_exit) | |
3068 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); | |
3069 | backtrace_list = backtrace.next; | |
3070 | return val; | |
3071 | } | |
3072 | \f | |
3073 | Lisp_Object | |
3074 | apply_lambda (fun, args, eval_flag) | |
3075 | Lisp_Object fun, args; | |
3076 | int eval_flag; | |
3077 | { | |
3078 | Lisp_Object args_left; | |
3079 | Lisp_Object numargs; | |
3080 | register Lisp_Object *arg_vector; | |
3081 | struct gcpro gcpro1, gcpro2, gcpro3; | |
3082 | register int i; | |
3083 | register Lisp_Object tem; | |
3084 | ||
3085 | numargs = Flength (args); | |
3086 | arg_vector = (Lisp_Object *) alloca (XINT (numargs) * sizeof (Lisp_Object)); | |
3087 | args_left = args; | |
3088 | ||
3089 | GCPRO3 (*arg_vector, args_left, fun); | |
3090 | gcpro1.nvars = 0; | |
3091 | ||
3092 | for (i = 0; i < XINT (numargs);) | |
3093 | { | |
3094 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
3095 | if (eval_flag) tem = Feval (tem); | |
3096 | arg_vector[i++] = tem; | |
3097 | gcpro1.nvars = i; | |
3098 | } | |
3099 | ||
3100 | UNGCPRO; | |
3101 | ||
3102 | if (eval_flag) | |
3103 | { | |
3104 | backtrace_list->args = arg_vector; | |
3105 | backtrace_list->nargs = i; | |
3106 | } | |
3107 | backtrace_list->evalargs = 0; | |
3108 | tem = funcall_lambda (fun, XINT (numargs), arg_vector); | |
3109 | ||
3110 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
3111 | if (backtrace_list->debug_on_exit) | |
3112 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
3113 | /* Don't do it again when we return to eval. */ | |
3114 | backtrace_list->debug_on_exit = 0; | |
3115 | return tem; | |
3116 | } | |
3117 | ||
3118 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
3119 | and return the result of evaluation. | |
3120 | FUN must be either a lambda-expression or a compiled-code object. */ | |
3121 | ||
2901f1d1 | 3122 | static Lisp_Object |
db9f0278 JB |
3123 | funcall_lambda (fun, nargs, arg_vector) |
3124 | Lisp_Object fun; | |
3125 | int nargs; | |
3126 | register Lisp_Object *arg_vector; | |
3127 | { | |
9ab90667 | 3128 | Lisp_Object val, syms_left, next; |
aed13378 | 3129 | int count = SPECPDL_INDEX (); |
9ab90667 | 3130 | int i, optional, rest; |
db9f0278 | 3131 | |
90165123 | 3132 | if (CONSP (fun)) |
9ab90667 GM |
3133 | { |
3134 | syms_left = XCDR (fun); | |
3135 | if (CONSP (syms_left)) | |
3136 | syms_left = XCAR (syms_left); | |
3137 | else | |
734d55a2 | 3138 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3139 | } |
90165123 | 3140 | else if (COMPILEDP (fun)) |
845975f5 | 3141 | syms_left = AREF (fun, COMPILED_ARGLIST); |
9ab90667 GM |
3142 | else |
3143 | abort (); | |
db9f0278 | 3144 | |
9ab90667 GM |
3145 | i = optional = rest = 0; |
3146 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
3147 | { |
3148 | QUIT; | |
177c0ea7 | 3149 | |
9ab90667 | 3150 | next = XCAR (syms_left); |
8788120f | 3151 | if (!SYMBOLP (next)) |
734d55a2 | 3152 | xsignal1 (Qinvalid_function, fun); |
177c0ea7 | 3153 | |
db9f0278 JB |
3154 | if (EQ (next, Qand_rest)) |
3155 | rest = 1; | |
3156 | else if (EQ (next, Qand_optional)) | |
3157 | optional = 1; | |
3158 | else if (rest) | |
3159 | { | |
9ffa21d4 | 3160 | specbind (next, Flist (nargs - i, &arg_vector[i])); |
db9f0278 JB |
3161 | i = nargs; |
3162 | } | |
3163 | else if (i < nargs) | |
9ab90667 | 3164 | specbind (next, arg_vector[i++]); |
db9f0278 | 3165 | else if (!optional) |
734d55a2 | 3166 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 JB |
3167 | else |
3168 | specbind (next, Qnil); | |
3169 | } | |
3170 | ||
9ab90667 | 3171 | if (!NILP (syms_left)) |
734d55a2 | 3172 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3173 | else if (i < nargs) |
734d55a2 | 3174 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 | 3175 | |
90165123 | 3176 | if (CONSP (fun)) |
9ab90667 | 3177 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 3178 | else |
ca248607 RS |
3179 | { |
3180 | /* If we have not actually read the bytecode string | |
3181 | and constants vector yet, fetch them from the file. */ | |
845975f5 | 3182 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) |
661c7d6e | 3183 | Ffetch_bytecode (fun); |
845975f5 SM |
3184 | val = Fbyte_code (AREF (fun, COMPILED_BYTECODE), |
3185 | AREF (fun, COMPILED_CONSTANTS), | |
3186 | AREF (fun, COMPILED_STACK_DEPTH)); | |
ca248607 | 3187 | } |
177c0ea7 | 3188 | |
db9f0278 JB |
3189 | return unbind_to (count, val); |
3190 | } | |
661c7d6e KH |
3191 | |
3192 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
9dbc9081 PJ |
3193 | 1, 1, 0, |
3194 | doc: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */) | |
3195 | (object) | |
661c7d6e KH |
3196 | Lisp_Object object; |
3197 | { | |
3198 | Lisp_Object tem; | |
3199 | ||
845975f5 | 3200 | if (COMPILEDP (object) && CONSP (AREF (object, COMPILED_BYTECODE))) |
661c7d6e | 3201 | { |
845975f5 | 3202 | tem = read_doc_string (AREF (object, COMPILED_BYTECODE)); |
5bbdb090 | 3203 | if (!CONSP (tem)) |
845975f5 SM |
3204 | { |
3205 | tem = AREF (object, COMPILED_BYTECODE); | |
3206 | if (CONSP (tem) && STRINGP (XCAR (tem))) | |
d5db4077 | 3207 | error ("Invalid byte code in %s", SDATA (XCAR (tem))); |
845975f5 SM |
3208 | else |
3209 | error ("Invalid byte code"); | |
3210 | } | |
3211 | AREF (object, COMPILED_BYTECODE) = XCAR (tem); | |
3212 | AREF (object, COMPILED_CONSTANTS) = XCDR (tem); | |
661c7d6e KH |
3213 | } |
3214 | return object; | |
3215 | } | |
db9f0278 JB |
3216 | \f |
3217 | void | |
3218 | grow_specpdl () | |
3219 | { | |
aed13378 | 3220 | register int count = SPECPDL_INDEX (); |
db9f0278 JB |
3221 | if (specpdl_size >= max_specpdl_size) |
3222 | { | |
3223 | if (max_specpdl_size < 400) | |
3224 | max_specpdl_size = 400; | |
3225 | if (specpdl_size >= max_specpdl_size) | |
734d55a2 | 3226 | signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil); |
db9f0278 JB |
3227 | } |
3228 | specpdl_size *= 2; | |
3229 | if (specpdl_size > max_specpdl_size) | |
3230 | specpdl_size = max_specpdl_size; | |
3231 | specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding)); | |
3232 | specpdl_ptr = specpdl + count; | |
3233 | } | |
3234 | ||
3235 | void | |
3236 | specbind (symbol, value) | |
3237 | Lisp_Object symbol, value; | |
3238 | { | |
db9f0278 | 3239 | Lisp_Object ovalue; |
19cebf5a | 3240 | Lisp_Object valcontents; |
db9f0278 | 3241 | |
b7826503 | 3242 | CHECK_SYMBOL (symbol); |
db9f0278 JB |
3243 | if (specpdl_ptr == specpdl + specpdl_size) |
3244 | grow_specpdl (); | |
719177b3 | 3245 | |
19cebf5a GM |
3246 | /* The most common case is that of a non-constant symbol with a |
3247 | trivial value. Make that as fast as we can. */ | |
3248 | valcontents = SYMBOL_VALUE (symbol); | |
3249 | if (!MISCP (valcontents) && !SYMBOL_CONSTANT_P (symbol)) | |
719177b3 | 3250 | { |
9ab90667 | 3251 | specpdl_ptr->symbol = symbol; |
19cebf5a | 3252 | specpdl_ptr->old_value = valcontents; |
9ab90667 GM |
3253 | specpdl_ptr->func = NULL; |
3254 | ++specpdl_ptr; | |
19cebf5a | 3255 | SET_SYMBOL_VALUE (symbol, value); |
719177b3 RS |
3256 | } |
3257 | else | |
9ab90667 | 3258 | { |
eb700b82 | 3259 | Lisp_Object valcontents; |
177c0ea7 | 3260 | |
9ab90667 GM |
3261 | ovalue = find_symbol_value (symbol); |
3262 | specpdl_ptr->func = 0; | |
3263 | specpdl_ptr->old_value = ovalue; | |
719177b3 | 3264 | |
eb700b82 GM |
3265 | valcontents = XSYMBOL (symbol)->value; |
3266 | ||
3267 | if (BUFFER_LOCAL_VALUEP (valcontents) | |
3268 | || SOME_BUFFER_LOCAL_VALUEP (valcontents) | |
3269 | || BUFFER_OBJFWDP (valcontents)) | |
9ab90667 | 3270 | { |
0967b4b0 GM |
3271 | Lisp_Object where, current_buffer; |
3272 | ||
3273 | current_buffer = Fcurrent_buffer (); | |
177c0ea7 | 3274 | |
9ab90667 | 3275 | /* For a local variable, record both the symbol and which |
eb700b82 GM |
3276 | buffer's or frame's value we are saving. */ |
3277 | if (!NILP (Flocal_variable_p (symbol, Qnil))) | |
0967b4b0 | 3278 | where = current_buffer; |
eb700b82 GM |
3279 | else if (!BUFFER_OBJFWDP (valcontents) |
3280 | && XBUFFER_LOCAL_VALUE (valcontents)->found_for_frame) | |
3281 | where = XBUFFER_LOCAL_VALUE (valcontents)->frame; | |
3282 | else | |
3283 | where = Qnil; | |
3284 | ||
3285 | /* We're not using the `unused' slot in the specbinding | |
3286 | structure because this would mean we have to do more | |
3287 | work for simple variables. */ | |
0967b4b0 | 3288 | specpdl_ptr->symbol = Fcons (symbol, Fcons (where, current_buffer)); |
06bccf8e GM |
3289 | |
3290 | /* If SYMBOL is a per-buffer variable which doesn't have a | |
3291 | buffer-local value here, make the `let' change the global | |
3292 | value by changing the value of SYMBOL in all buffers not | |
3293 | having their own value. This is consistent with what | |
3294 | happens with other buffer-local variables. */ | |
eb700b82 GM |
3295 | if (NILP (where) |
3296 | && BUFFER_OBJFWDP (valcontents)) | |
06bccf8e GM |
3297 | { |
3298 | ++specpdl_ptr; | |
3299 | Fset_default (symbol, value); | |
3300 | return; | |
3301 | } | |
9ab90667 GM |
3302 | } |
3303 | else | |
3304 | specpdl_ptr->symbol = symbol; | |
3305 | ||
3306 | specpdl_ptr++; | |
3307 | if (BUFFER_OBJFWDP (ovalue) || KBOARD_OBJFWDP (ovalue)) | |
eae0e123 | 3308 | store_symval_forwarding (symbol, ovalue, value, NULL); |
9ab90667 GM |
3309 | else |
3310 | set_internal (symbol, value, 0, 1); | |
3311 | } | |
db9f0278 JB |
3312 | } |
3313 | ||
3314 | void | |
3315 | record_unwind_protect (function, arg) | |
1d159538 | 3316 | Lisp_Object (*function) P_ ((Lisp_Object)); |
db9f0278 JB |
3317 | Lisp_Object arg; |
3318 | { | |
9ba8e10d CY |
3319 | eassert (!handling_signal); |
3320 | ||
db9f0278 JB |
3321 | if (specpdl_ptr == specpdl + specpdl_size) |
3322 | grow_specpdl (); | |
3323 | specpdl_ptr->func = function; | |
3324 | specpdl_ptr->symbol = Qnil; | |
3325 | specpdl_ptr->old_value = arg; | |
3326 | specpdl_ptr++; | |
3327 | } | |
3328 | ||
3329 | Lisp_Object | |
3330 | unbind_to (count, value) | |
3331 | int count; | |
3332 | Lisp_Object value; | |
3333 | { | |
5a073f50 KS |
3334 | Lisp_Object quitf = Vquit_flag; |
3335 | struct gcpro gcpro1, gcpro2; | |
db9f0278 | 3336 | |
5a073f50 | 3337 | GCPRO2 (value, quitf); |
db9f0278 JB |
3338 | Vquit_flag = Qnil; |
3339 | ||
3340 | while (specpdl_ptr != specpdl + count) | |
3341 | { | |
611a8f8c RS |
3342 | /* Copy the binding, and decrement specpdl_ptr, before we do |
3343 | the work to unbind it. We decrement first | |
3344 | so that an error in unbinding won't try to unbind | |
3345 | the same entry again, and we copy the binding first | |
3346 | in case more bindings are made during some of the code we run. */ | |
eb700b82 | 3347 | |
45f266dc DL |
3348 | struct specbinding this_binding; |
3349 | this_binding = *--specpdl_ptr; | |
611a8f8c RS |
3350 | |
3351 | if (this_binding.func != 0) | |
3352 | (*this_binding.func) (this_binding.old_value); | |
0967b4b0 GM |
3353 | /* If the symbol is a list, it is really (SYMBOL WHERE |
3354 | . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a | |
3355 | frame. If WHERE is a buffer or frame, this indicates we | |
1b1acc13 PJ |
3356 | bound a variable that had a buffer-local or frame-local |
3357 | binding. WHERE nil means that the variable had the default | |
0967b4b0 GM |
3358 | value when it was bound. CURRENT-BUFFER is the buffer that |
3359 | was current when the variable was bound. */ | |
611a8f8c | 3360 | else if (CONSP (this_binding.symbol)) |
719177b3 | 3361 | { |
eb700b82 | 3362 | Lisp_Object symbol, where; |
719177b3 | 3363 | |
611a8f8c RS |
3364 | symbol = XCAR (this_binding.symbol); |
3365 | where = XCAR (XCDR (this_binding.symbol)); | |
719177b3 | 3366 | |
eb700b82 | 3367 | if (NILP (where)) |
611a8f8c | 3368 | Fset_default (symbol, this_binding.old_value); |
eb700b82 | 3369 | else if (BUFFERP (where)) |
611a8f8c | 3370 | set_internal (symbol, this_binding.old_value, XBUFFER (where), 1); |
177c0ea7 | 3371 | else |
611a8f8c | 3372 | set_internal (symbol, this_binding.old_value, NULL, 1); |
719177b3 | 3373 | } |
db9f0278 | 3374 | else |
9ab90667 GM |
3375 | { |
3376 | /* If variable has a trivial value (no forwarding), we can | |
3377 | just set it. No need to check for constant symbols here, | |
3378 | since that was already done by specbind. */ | |
611a8f8c RS |
3379 | if (!MISCP (SYMBOL_VALUE (this_binding.symbol))) |
3380 | SET_SYMBOL_VALUE (this_binding.symbol, this_binding.old_value); | |
9ab90667 | 3381 | else |
611a8f8c | 3382 | set_internal (this_binding.symbol, this_binding.old_value, 0, 1); |
9ab90667 | 3383 | } |
db9f0278 | 3384 | } |
177c0ea7 | 3385 | |
5a073f50 KS |
3386 | if (NILP (Vquit_flag) && !NILP (quitf)) |
3387 | Vquit_flag = quitf; | |
db9f0278 JB |
3388 | |
3389 | UNGCPRO; | |
db9f0278 JB |
3390 | return value; |
3391 | } | |
3392 | \f | |
db9f0278 | 3393 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, |
9dbc9081 PJ |
3394 | doc: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. |
3395 | The debugger is entered when that frame exits, if the flag is non-nil. */) | |
3396 | (level, flag) | |
db9f0278 JB |
3397 | Lisp_Object level, flag; |
3398 | { | |
3399 | register struct backtrace *backlist = backtrace_list; | |
3400 | register int i; | |
3401 | ||
b7826503 | 3402 | CHECK_NUMBER (level); |
db9f0278 JB |
3403 | |
3404 | for (i = 0; backlist && i < XINT (level); i++) | |
3405 | { | |
3406 | backlist = backlist->next; | |
3407 | } | |
3408 | ||
3409 | if (backlist) | |
265a9e55 | 3410 | backlist->debug_on_exit = !NILP (flag); |
db9f0278 JB |
3411 | |
3412 | return flag; | |
3413 | } | |
3414 | ||
3415 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
9dbc9081 PJ |
3416 | doc: /* Print a trace of Lisp function calls currently active. |
3417 | Output stream used is value of `standard-output'. */) | |
3418 | () | |
db9f0278 JB |
3419 | { |
3420 | register struct backtrace *backlist = backtrace_list; | |
3421 | register int i; | |
3422 | Lisp_Object tail; | |
3423 | Lisp_Object tem; | |
3424 | extern Lisp_Object Vprint_level; | |
3425 | struct gcpro gcpro1; | |
3426 | ||
a631e24c | 3427 | XSETFASTINT (Vprint_level, 3); |
db9f0278 JB |
3428 | |
3429 | tail = Qnil; | |
3430 | GCPRO1 (tail); | |
3431 | ||
3432 | while (backlist) | |
3433 | { | |
3434 | write_string (backlist->debug_on_exit ? "* " : " ", 2); | |
3435 | if (backlist->nargs == UNEVALLED) | |
3436 | { | |
3437 | Fprin1 (Fcons (*backlist->function, *backlist->args), Qnil); | |
b6703b02 | 3438 | write_string ("\n", -1); |
db9f0278 JB |
3439 | } |
3440 | else | |
3441 | { | |
3442 | tem = *backlist->function; | |
3443 | Fprin1 (tem, Qnil); /* This can QUIT */ | |
3444 | write_string ("(", -1); | |
3445 | if (backlist->nargs == MANY) | |
3446 | { | |
3447 | for (tail = *backlist->args, i = 0; | |
265a9e55 | 3448 | !NILP (tail); |
db9f0278 JB |
3449 | tail = Fcdr (tail), i++) |
3450 | { | |
3451 | if (i) write_string (" ", -1); | |
3452 | Fprin1 (Fcar (tail), Qnil); | |
3453 | } | |
3454 | } | |
3455 | else | |
3456 | { | |
3457 | for (i = 0; i < backlist->nargs; i++) | |
3458 | { | |
3459 | if (i) write_string (" ", -1); | |
3460 | Fprin1 (backlist->args[i], Qnil); | |
3461 | } | |
3462 | } | |
b6703b02 | 3463 | write_string (")\n", -1); |
db9f0278 | 3464 | } |
db9f0278 JB |
3465 | backlist = backlist->next; |
3466 | } | |
3467 | ||
3468 | Vprint_level = Qnil; | |
3469 | UNGCPRO; | |
3470 | return Qnil; | |
3471 | } | |
3472 | ||
17401c97 | 3473 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
9dbc9081 PJ |
3474 | doc: /* Return the function and arguments NFRAMES up from current execution point. |
3475 | If that frame has not evaluated the arguments yet (or is a special form), | |
3476 | the value is (nil FUNCTION ARG-FORMS...). | |
3477 | If that frame has evaluated its arguments and called its function already, | |
3478 | the value is (t FUNCTION ARG-VALUES...). | |
3479 | A &rest arg is represented as the tail of the list ARG-VALUES. | |
3480 | FUNCTION is whatever was supplied as car of evaluated list, | |
3481 | or a lambda expression for macro calls. | |
3482 | If NFRAMES is more than the number of frames, the value is nil. */) | |
3483 | (nframes) | |
db9f0278 JB |
3484 | Lisp_Object nframes; |
3485 | { | |
3486 | register struct backtrace *backlist = backtrace_list; | |
3487 | register int i; | |
3488 | Lisp_Object tem; | |
3489 | ||
b7826503 | 3490 | CHECK_NATNUM (nframes); |
db9f0278 JB |
3491 | |
3492 | /* Find the frame requested. */ | |
b6703b02 | 3493 | for (i = 0; backlist && i < XFASTINT (nframes); i++) |
db9f0278 JB |
3494 | backlist = backlist->next; |
3495 | ||
3496 | if (!backlist) | |
3497 | return Qnil; | |
3498 | if (backlist->nargs == UNEVALLED) | |
3499 | return Fcons (Qnil, Fcons (*backlist->function, *backlist->args)); | |
3500 | else | |
3501 | { | |
3502 | if (backlist->nargs == MANY) | |
3503 | tem = *backlist->args; | |
3504 | else | |
3505 | tem = Flist (backlist->nargs, backlist->args); | |
3506 | ||
3507 | return Fcons (Qt, Fcons (*backlist->function, tem)); | |
3508 | } | |
3509 | } | |
a2ff3819 | 3510 | |
db9f0278 | 3511 | \f |
4ce0541e SM |
3512 | void |
3513 | mark_backtrace () | |
3514 | { | |
3515 | register struct backtrace *backlist; | |
3516 | register int i; | |
3517 | ||
3518 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
3519 | { | |
3520 | mark_object (*backlist->function); | |
3521 | ||
3522 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
3523 | i = 0; | |
3524 | else | |
3525 | i = backlist->nargs - 1; | |
3526 | for (; i >= 0; i--) | |
3527 | mark_object (backlist->args[i]); | |
3528 | } | |
3529 | } | |
3530 | ||
dfcf069d | 3531 | void |
db9f0278 JB |
3532 | syms_of_eval () |
3533 | { | |
3534 | DEFVAR_INT ("max-specpdl-size", &max_specpdl_size, | |
82fc29a1 | 3535 | doc: /* *Limit on number of Lisp variable bindings and `unwind-protect's. |
9f5903bb | 3536 | If Lisp code tries to increase the total number past this amount, |
2520dc0c RS |
3537 | an error is signaled. |
3538 | You can safely use a value considerably larger than the default value, | |
3539 | if that proves inconveniently small. However, if you increase it too far, | |
3540 | Emacs could run out of memory trying to make the stack bigger. */); | |
db9f0278 JB |
3541 | |
3542 | DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth, | |
9dbc9081 | 3543 | doc: /* *Limit on depth in `eval', `apply' and `funcall' before error. |
2520dc0c RS |
3544 | |
3545 | This limit serves to catch infinite recursions for you before they cause | |
9dbc9081 PJ |
3546 | actual stack overflow in C, which would be fatal for Emacs. |
3547 | You can safely make it considerably larger than its default value, | |
2520dc0c RS |
3548 | if that proves inconveniently small. However, if you increase it too far, |
3549 | Emacs could overflow the real C stack, and crash. */); | |
db9f0278 JB |
3550 | |
3551 | DEFVAR_LISP ("quit-flag", &Vquit_flag, | |
9dbc9081 | 3552 | doc: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil. |
42ed718e RS |
3553 | If the value is t, that means do an ordinary quit. |
3554 | If the value equals `throw-on-input', that means quit by throwing | |
3555 | to the tag specified in `throw-on-input'; it's for handling `while-no-input'. | |
3556 | Typing C-g sets `quit-flag' to t, regardless of `inhibit-quit', | |
3557 | but `inhibit-quit' non-nil prevents anything from taking notice of that. */); | |
db9f0278 JB |
3558 | Vquit_flag = Qnil; |
3559 | ||
3560 | DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit, | |
9dbc9081 PJ |
3561 | doc: /* Non-nil inhibits C-g quitting from happening immediately. |
3562 | Note that `quit-flag' will still be set by typing C-g, | |
3563 | so a quit will be signaled as soon as `inhibit-quit' is nil. | |
3564 | To prevent this happening, set `quit-flag' to nil | |
3565 | before making `inhibit-quit' nil. */); | |
db9f0278 JB |
3566 | Vinhibit_quit = Qnil; |
3567 | ||
ad236261 JB |
3568 | Qinhibit_quit = intern ("inhibit-quit"); |
3569 | staticpro (&Qinhibit_quit); | |
3570 | ||
db9f0278 JB |
3571 | Qautoload = intern ("autoload"); |
3572 | staticpro (&Qautoload); | |
3573 | ||
3574 | Qdebug_on_error = intern ("debug-on-error"); | |
3575 | staticpro (&Qdebug_on_error); | |
3576 | ||
3577 | Qmacro = intern ("macro"); | |
3578 | staticpro (&Qmacro); | |
3579 | ||
d6edd563 GM |
3580 | Qdeclare = intern ("declare"); |
3581 | staticpro (&Qdeclare); | |
177c0ea7 | 3582 | |
db9f0278 JB |
3583 | /* Note that the process handling also uses Qexit, but we don't want |
3584 | to staticpro it twice, so we just do it here. */ | |
3585 | Qexit = intern ("exit"); | |
3586 | staticpro (&Qexit); | |
3587 | ||
3588 | Qinteractive = intern ("interactive"); | |
3589 | staticpro (&Qinteractive); | |
3590 | ||
3591 | Qcommandp = intern ("commandp"); | |
3592 | staticpro (&Qcommandp); | |
3593 | ||
3594 | Qdefun = intern ("defun"); | |
3595 | staticpro (&Qdefun); | |
3596 | ||
3597 | Qand_rest = intern ("&rest"); | |
3598 | staticpro (&Qand_rest); | |
3599 | ||
3600 | Qand_optional = intern ("&optional"); | |
3601 | staticpro (&Qand_optional); | |
3602 | ||
128c0f66 | 3603 | DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error, |
704788b3 RS |
3604 | doc: /* *Non-nil means errors display a backtrace buffer. |
3605 | More precisely, this happens for any error that is handled | |
3606 | by the editor command loop. | |
9dbc9081 PJ |
3607 | If the value is a list, an error only means to display a backtrace |
3608 | if one of its condition symbols appears in the list. */); | |
128c0f66 | 3609 | Vstack_trace_on_error = Qnil; |
db9f0278 | 3610 | |
128c0f66 | 3611 | DEFVAR_LISP ("debug-on-error", &Vdebug_on_error, |
9dbc9081 PJ |
3612 | doc: /* *Non-nil means enter debugger if an error is signaled. |
3613 | Does not apply to errors handled by `condition-case' or those | |
3614 | matched by `debug-ignored-errors'. | |
3615 | If the value is a list, an error only means to enter the debugger | |
3616 | if one of its condition symbols appears in the list. | |
3617 | When you evaluate an expression interactively, this variable | |
3618 | is temporarily non-nil if `eval-expression-debug-on-error' is non-nil. | |
3619 | See also variable `debug-on-quit'. */); | |
128c0f66 | 3620 | Vdebug_on_error = Qnil; |
db9f0278 | 3621 | |
fc950e09 | 3622 | DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors, |
9dbc9081 PJ |
3623 | doc: /* *List of errors for which the debugger should not be called. |
3624 | Each element may be a condition-name or a regexp that matches error messages. | |
3625 | If any element applies to a given error, that error skips the debugger | |
3626 | and just returns to top level. | |
3627 | This overrides the variable `debug-on-error'. | |
3628 | It does not apply to errors handled by `condition-case'. */); | |
fc950e09 KH |
3629 | Vdebug_ignored_errors = Qnil; |
3630 | ||
db9f0278 | 3631 | DEFVAR_BOOL ("debug-on-quit", &debug_on_quit, |
82fc29a1 JB |
3632 | doc: /* *Non-nil means enter debugger if quit is signaled (C-g, for example). |
3633 | Does not apply if quit is handled by a `condition-case'. */); | |
db9f0278 JB |
3634 | debug_on_quit = 0; |
3635 | ||
3636 | DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call, | |
9dbc9081 | 3637 | doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */); |
db9f0278 | 3638 | |
556d7314 | 3639 | DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue, |
9dbc9081 PJ |
3640 | doc: /* Non-nil means debugger may continue execution. |
3641 | This is nil when the debugger is called under circumstances where it | |
3642 | might not be safe to continue. */); | |
dac204bc | 3643 | debugger_may_continue = 1; |
556d7314 | 3644 | |
db9f0278 | 3645 | DEFVAR_LISP ("debugger", &Vdebugger, |
9dbc9081 PJ |
3646 | doc: /* Function to call to invoke debugger. |
3647 | If due to frame exit, args are `exit' and the value being returned; | |
3648 | this function's value will be returned instead of that. | |
3649 | If due to error, args are `error' and a list of the args to `signal'. | |
3650 | If due to `apply' or `funcall' entry, one arg, `lambda'. | |
3651 | If due to `eval' entry, one arg, t. */); | |
db9f0278 JB |
3652 | Vdebugger = Qnil; |
3653 | ||
61ede770 | 3654 | DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function, |
9dbc9081 PJ |
3655 | doc: /* If non-nil, this is a function for `signal' to call. |
3656 | It receives the same arguments that `signal' was given. | |
3657 | The Edebug package uses this to regain control. */); | |
61ede770 RS |
3658 | Vsignal_hook_function = Qnil; |
3659 | ||
57a6e758 | 3660 | DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal, |
9dbc9081 PJ |
3661 | doc: /* *Non-nil means call the debugger regardless of condition handlers. |
3662 | Note that `debug-on-error', `debug-on-quit' and friends | |
3663 | still determine whether to handle the particular condition. */); | |
57a6e758 | 3664 | Vdebug_on_signal = Qnil; |
61ede770 | 3665 | |
d6edd563 GM |
3666 | DEFVAR_LISP ("macro-declaration-function", &Vmacro_declaration_function, |
3667 | doc: /* Function to process declarations in a macro definition. | |
3668 | The function will be called with two args MACRO and DECL. | |
3669 | MACRO is the name of the macro being defined. | |
3670 | DECL is a list `(declare ...)' containing the declarations. | |
3671 | The value the function returns is not used. */); | |
3672 | Vmacro_declaration_function = Qnil; | |
3673 | ||
6e6e9f08 RS |
3674 | Vrun_hooks = intern ("run-hooks"); |
3675 | staticpro (&Vrun_hooks); | |
db9f0278 JB |
3676 | |
3677 | staticpro (&Vautoload_queue); | |
3678 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3679 | staticpro (&Vsignaling_function); |
3680 | Vsignaling_function = Qnil; | |
db9f0278 JB |
3681 | |
3682 | defsubr (&Sor); | |
3683 | defsubr (&Sand); | |
3684 | defsubr (&Sif); | |
3685 | defsubr (&Scond); | |
3686 | defsubr (&Sprogn); | |
3687 | defsubr (&Sprog1); | |
3688 | defsubr (&Sprog2); | |
3689 | defsubr (&Ssetq); | |
3690 | defsubr (&Squote); | |
3691 | defsubr (&Sfunction); | |
3692 | defsubr (&Sdefun); | |
3693 | defsubr (&Sdefmacro); | |
3694 | defsubr (&Sdefvar); | |
19cebf5a | 3695 | defsubr (&Sdefvaralias); |
db9f0278 JB |
3696 | defsubr (&Sdefconst); |
3697 | defsubr (&Suser_variable_p); | |
3698 | defsubr (&Slet); | |
3699 | defsubr (&SletX); | |
3700 | defsubr (&Swhile); | |
3701 | defsubr (&Smacroexpand); | |
3702 | defsubr (&Scatch); | |
3703 | defsubr (&Sthrow); | |
3704 | defsubr (&Sunwind_protect); | |
3705 | defsubr (&Scondition_case); | |
3706 | defsubr (&Ssignal); | |
3707 | defsubr (&Sinteractive_p); | |
4b664e76 | 3708 | defsubr (&Scalled_interactively_p); |
db9f0278 JB |
3709 | defsubr (&Scommandp); |
3710 | defsubr (&Sautoload); | |
3711 | defsubr (&Seval); | |
3712 | defsubr (&Sapply); | |
3713 | defsubr (&Sfuncall); | |
ff936e53 SM |
3714 | defsubr (&Srun_hooks); |
3715 | defsubr (&Srun_hook_with_args); | |
3716 | defsubr (&Srun_hook_with_args_until_success); | |
3717 | defsubr (&Srun_hook_with_args_until_failure); | |
661c7d6e | 3718 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3719 | defsubr (&Sbacktrace_debug); |
3720 | defsubr (&Sbacktrace); | |
3721 | defsubr (&Sbacktrace_frame); | |
3722 | } | |
ab5796a9 MB |
3723 | |
3724 | /* arch-tag: 014a07aa-33ab-4a8f-a3d2-ee8a4a9ff7fb | |
3725 | (do not change this comment) */ |