|
0
|
1 /* Evaluator for XEmacs Lisp interpreter.
|
|
|
2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc.
|
|
|
3 Copyright (C) 1995 Sun Microsystems, Inc.
|
|
|
4
|
|
|
5 This file is part of XEmacs.
|
|
|
6
|
|
|
7 XEmacs is free software; you can redistribute it and/or modify it
|
|
|
8 under the terms of the GNU General Public License as published by the
|
|
|
9 Free Software Foundation; either version 2, or (at your option) any
|
|
|
10 later version.
|
|
|
11
|
|
|
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
|
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
|
15 for more details.
|
|
|
16
|
|
|
17 You should have received a copy of the GNU General Public License
|
|
|
18 along with XEmacs; see the file COPYING. If not, write to
|
|
|
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
20 Boston, MA 02111-1307, USA. */
|
|
|
21
|
|
|
22 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */
|
|
|
23
|
|
|
24 #include <config.h>
|
|
|
25 #include "lisp.h"
|
|
|
26
|
|
|
27 #include "commands.h"
|
|
|
28 #include "backtrace.h"
|
|
|
29 #include "bytecode.h"
|
|
|
30 #include "buffer.h"
|
|
|
31 #include "console.h"
|
|
|
32 #include "opaque.h"
|
|
|
33
|
|
380
|
34 #ifdef ERROR_CHECK_GC
|
|
|
35 int always_gc; /* Debugging hack */
|
|
|
36 #else
|
|
|
37 #define always_gc 0
|
|
|
38 #endif
|
|
|
39
|
|
0
|
40 struct backtrace *backtrace_list;
|
|
|
41
|
|
380
|
42 /* Note: you must always fill in all of the fields in a backtrace structure
|
|
116
|
43 before pushing them on the backtrace_list. The profiling code depends
|
|
|
44 on this. */
|
|
|
45
|
|
380
|
46 #define PUSH_BACKTRACE(bt) do { \
|
|
|
47 (bt).next = backtrace_list; \
|
|
|
48 backtrace_list = &(bt); \
|
|
|
49 } while (0)
|
|
|
50
|
|
|
51 #define POP_BACKTRACE(bt) do { \
|
|
|
52 backtrace_list = (bt).next; \
|
|
|
53 } while (0)
|
|
|
54
|
|
|
55 /* Macros for calling subrs with an argument list whose length is only
|
|
|
56 known at runtime. See EXFUN and DEFUN for similar hackery. */
|
|
|
57
|
|
|
58 #define AV_0(av)
|
|
|
59 #define AV_1(av) av[0]
|
|
|
60 #define AV_2(av) AV_1(av), av[1]
|
|
|
61 #define AV_3(av) AV_2(av), av[2]
|
|
|
62 #define AV_4(av) AV_3(av), av[3]
|
|
|
63 #define AV_5(av) AV_4(av), av[4]
|
|
|
64 #define AV_6(av) AV_5(av), av[5]
|
|
|
65 #define AV_7(av) AV_6(av), av[6]
|
|
|
66 #define AV_8(av) AV_7(av), av[7]
|
|
|
67
|
|
|
68 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \
|
|
|
69 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av)))
|
|
|
70
|
|
|
71 /* If subrs take more than 8 arguments, more cases need to be added
|
|
|
72 to this switch. (But wait - don't do it - if you really need
|
|
|
73 a SUBR with more than 8 arguments, use max_args == MANY.
|
|
|
74 See the DEFUN macro in lisp.h) */
|
|
|
75 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \
|
|
398
|
76 void (*PF_fn)(void) = (void (*)(void)) fn; \
|
|
380
|
77 Lisp_Object *PF_av = (av); \
|
|
|
78 switch (ac) \
|
|
|
79 { \
|
|
398
|
80 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \
|
|
380
|
81 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \
|
|
|
82 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \
|
|
|
83 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \
|
|
|
84 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \
|
|
|
85 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \
|
|
|
86 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \
|
|
|
87 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \
|
|
|
88 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \
|
|
|
89 } \
|
|
|
90 } while (0)
|
|
|
91
|
|
|
92 #define FUNCALL_SUBR(rv, subr, av, ac) \
|
|
|
93 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac);
|
|
|
94
|
|
116
|
95
|
|
0
|
96 /* This is the list of current catches (and also condition-cases).
|
|
|
97 This is a stack: the most recent catch is at the head of the
|
|
|
98 list. Catches are created by declaring a 'struct catchtag'
|
|
|
99 locally, filling the .TAG field in with the tag, and doing
|
|
|
100 a setjmp() on .JMP. Fthrow() will store the value passed
|
|
|
101 to it in .VAL and longjmp() back to .JMP, back to the function
|
|
|
102 that established the catch. This will always be either
|
|
|
103 internal_catch() (catches established internally or through
|
|
|
104 `catch') or condition_case_1 (condition-cases established
|
|
|
105 internally or through `condition-case').
|
|
|
106
|
|
|
107 The catchtag also records the current position in the
|
|
|
108 call stack (stored in BACKTRACE_LIST), the current position
|
|
|
109 in the specpdl stack (used for variable bindings and
|
|
|
110 unwind-protects), the value of LISP_EVAL_DEPTH, and the
|
|
|
111 current position in the GCPRO stack. All of these are
|
|
|
112 restored by Fthrow().
|
|
|
113 */
|
|
185
|
114
|
|
0
|
115 struct catchtag *catchlist;
|
|
|
116
|
|
|
117 Lisp_Object Qautoload, Qmacro, Qexit;
|
|
|
118 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues;
|
|
|
119 Lisp_Object Vquit_flag, Vinhibit_quit;
|
|
|
120 Lisp_Object Qand_rest, Qand_optional;
|
|
272
|
121 Lisp_Object Qdebug_on_error, Qstack_trace_on_error;
|
|
|
122 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal;
|
|
0
|
123 Lisp_Object Qdebugger;
|
|
|
124 Lisp_Object Qinhibit_quit;
|
|
|
125 Lisp_Object Qrun_hooks;
|
|
|
126 Lisp_Object Qsetq;
|
|
|
127 Lisp_Object Qdisplay_warning;
|
|
|
128 Lisp_Object Vpending_warnings, Vpending_warnings_tail;
|
|
380
|
129 Lisp_Object Qif;
|
|
0
|
130
|
|
|
131 /* Records whether we want errors to occur. This will be a boolean,
|
|
|
132 nil (errors OK) or t (no errors). If t, an error will cause a
|
|
|
133 throw to Qunbound_suspended_errors_tag.
|
|
|
134
|
|
|
135 See call_with_suspended_errors(). */
|
|
|
136 Lisp_Object Vcurrent_error_state;
|
|
|
137
|
|
|
138 /* Current warning class when warnings occur, or nil for no warnings.
|
|
|
139 Only meaningful when Vcurrent_error_state is non-nil.
|
|
|
140 See call_with_suspended_errors(). */
|
|
|
141 Lisp_Object Vcurrent_warning_class;
|
|
|
142
|
|
|
143 /* Special catch tag used in call_with_suspended_errors(). */
|
|
|
144 Lisp_Object Qunbound_suspended_errors_tag;
|
|
|
145
|
|
|
146 /* Non-nil means record all fset's and provide's, to be undone
|
|
|
147 if the file being autoloaded is not fully loaded.
|
|
|
148 They are recorded by being consed onto the front of Vautoload_queue:
|
|
|
149 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
|
|
|
150 Lisp_Object Vautoload_queue;
|
|
|
151
|
|
|
152 /* Current number of specbindings allocated in specpdl. */
|
|
380
|
153 int specpdl_size;
|
|
0
|
154
|
|
|
155 /* Pointer to beginning of specpdl. */
|
|
|
156 struct specbinding *specpdl;
|
|
|
157
|
|
|
158 /* Pointer to first unused element in specpdl. */
|
|
|
159 struct specbinding *specpdl_ptr;
|
|
|
160
|
|
380
|
161 /* specpdl_ptr - specpdl */
|
|
|
162 int specpdl_depth_counter;
|
|
0
|
163
|
|
|
164 /* Maximum size allowed for specpdl allocation */
|
|
|
165 int max_specpdl_size;
|
|
|
166
|
|
|
167 /* Depth in Lisp evaluations and function calls. */
|
|
398
|
168 static int lisp_eval_depth;
|
|
0
|
169
|
|
|
170 /* Maximum allowed depth in Lisp evaluations and function calls. */
|
|
|
171 int max_lisp_eval_depth;
|
|
|
172
|
|
|
173 /* Nonzero means enter debugger before next function call */
|
|
|
174 static int debug_on_next_call;
|
|
|
175
|
|
|
176 /* List of conditions (non-nil atom means all) which cause a backtrace
|
|
|
177 if an error is handled by the command loop's error handler. */
|
|
|
178 Lisp_Object Vstack_trace_on_error;
|
|
|
179
|
|
|
180 /* List of conditions (non-nil atom means all) which enter the debugger
|
|
|
181 if an error is handled by the command loop's error handler. */
|
|
|
182 Lisp_Object Vdebug_on_error;
|
|
|
183
|
|
163
|
184 /* List of conditions and regexps specifying error messages which
|
|
|
185 do not enter the debugger even if Vdebug_on_error says they should. */
|
|
|
186 Lisp_Object Vdebug_ignored_errors;
|
|
|
187
|
|
0
|
188 /* List of conditions (non-nil atom means all) which cause a backtrace
|
|
|
189 if any error is signalled. */
|
|
|
190 Lisp_Object Vstack_trace_on_signal;
|
|
|
191
|
|
|
192 /* List of conditions (non-nil atom means all) which enter the debugger
|
|
|
193 if any error is signalled. */
|
|
|
194 Lisp_Object Vdebug_on_signal;
|
|
|
195
|
|
|
196 /* Nonzero means enter debugger if a quit signal
|
|
|
197 is handled by the command loop's error handler.
|
|
|
198
|
|
|
199 From lisp, this is a boolean variable and may have the values 0 and 1.
|
|
|
200 But, eval.c temporarily uses the second bit of this variable to indicate
|
|
|
201 that a critical_quit is in progress. The second bit is reset immediately
|
|
|
202 after it is processed in signal_call_debugger(). */
|
|
|
203 int debug_on_quit;
|
|
|
204
|
|
|
205 #if 0 /* FSFmacs */
|
|
|
206 /* entering_debugger is basically equivalent */
|
|
|
207 /* The value of num_nonmacro_input_chars as of the last time we
|
|
|
208 started to enter the debugger. If we decide to enter the debugger
|
|
|
209 again when this is still equal to num_nonmacro_input_chars, then we
|
|
|
210 know that the debugger itself has an error, and we should just
|
|
|
211 signal the error instead of entering an infinite loop of debugger
|
|
|
212 invocations. */
|
|
|
213 int when_entered_debugger;
|
|
|
214 #endif
|
|
|
215
|
|
|
216 /* Nonzero means we are trying to enter the debugger.
|
|
185
|
217 This is to prevent recursive attempts.
|
|
0
|
218 Cleared by the debugger calling Fbacktrace */
|
|
|
219 static int entering_debugger;
|
|
|
220
|
|
|
221 /* Function to call to invoke the debugger */
|
|
|
222 Lisp_Object Vdebugger;
|
|
|
223
|
|
|
224 /* Chain of condition handlers currently in effect.
|
|
|
225 The elements of this chain are contained in the stack frames
|
|
|
226 of Fcondition_case and internal_condition_case.
|
|
|
227 When an error is signaled (by calling Fsignal, below),
|
|
|
228 this chain is searched for an element that applies.
|
|
|
229
|
|
|
230 Each element of this list is one of the following:
|
|
|
231
|
|
|
232 A list of a handler function and possibly args to pass to
|
|
|
233 the function. This is a handler established with
|
|
|
234 `call-with-condition-handler' (q.v.).
|
|
|
235
|
|
|
236 A list whose car is Qunbound and whose cdr is Qt.
|
|
|
237 This is a special condition-case handler established
|
|
|
238 by C code with condition_case_1(). All errors are
|
|
|
239 trapped; the debugger is not invoked even if
|
|
|
240 `debug-on-error' was set.
|
|
|
241
|
|
|
242 A list whose car is Qunbound and whose cdr is Qerror.
|
|
|
243 This is a special condition-case handler established
|
|
|
244 by C code with condition_case_1(). It is like Qt
|
|
|
245 except that the debugger is invoked normally if it is
|
|
|
246 called for.
|
|
|
247
|
|
|
248 A list whose car is Qunbound and whose cdr is a list
|
|
|
249 of lists (CONDITION-NAME BODY ...) exactly as in
|
|
|
250 `condition-case'. This is a normal `condition-case'
|
|
|
251 handler.
|
|
|
252
|
|
|
253 Note that in all cases *except* the first, there is a
|
|
|
254 corresponding catch, whose TAG is the value of
|
|
|
255 Vcondition_handlers just after the handler data just
|
|
|
256 described is pushed onto it. The reason is that
|
|
|
257 `condition-case' handlers need to throw back to the
|
|
|
258 place where the handler was installed before invoking
|
|
|
259 it, while `call-with-condition-handler' handlers are
|
|
|
260 invoked in the environment that `signal' was invoked
|
|
|
261 in.
|
|
|
262 */
|
|
|
263 static Lisp_Object Vcondition_handlers;
|
|
|
264
|
|
380
|
265
|
|
404
|
266 #define DEFEND_AGAINST_THROW_RECURSION
|
|
|
267
|
|
|
268 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
0
|
269 /* Used for error catching purposes by throw_or_bomb_out */
|
|
|
270 static int throw_level;
|
|
404
|
271 #endif
|
|
|
272
|
|
|
273 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
274 void check_error_state_sanity (void);
|
|
|
275 #endif
|
|
0
|
276
|
|
|
277
|
|
380
|
278 /************************************************************************/
|
|
|
279 /* The subr object type */
|
|
|
280 /************************************************************************/
|
|
0
|
281
|
|
|
282 static void
|
|
|
283 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
|
|
|
284 {
|
|
380
|
285 Lisp_Subr *subr = XSUBR (obj);
|
|
398
|
286 const char *header =
|
|
380
|
287 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr ";
|
|
398
|
288 const char *name = subr_name (subr);
|
|
|
289 const char *trailer = subr->prompt ? " (interactive)>" : ">";
|
|
0
|
290
|
|
|
291 if (print_readably)
|
|
380
|
292 error ("printing unreadable object %s%s%s", header, name, trailer);
|
|
|
293
|
|
|
294 write_c_string (header, printcharfun);
|
|
|
295 write_c_string (name, printcharfun);
|
|
|
296 write_c_string (trailer, printcharfun);
|
|
0
|
297 }
|
|
|
298
|
|
398
|
299 static const struct lrecord_description subr_description[] = {
|
|
|
300 { XD_DOC_STRING, offsetof (Lisp_Subr, doc) },
|
|
|
301 { XD_END }
|
|
|
302 };
|
|
|
303
|
|
|
304 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr,
|
|
400
|
305 0, print_subr, 0, 0, 0,
|
|
398
|
306 subr_description,
|
|
|
307 Lisp_Subr);
|
|
0
|
308
|
|
380
|
309 /************************************************************************/
|
|
|
310 /* Entering the debugger */
|
|
|
311 /************************************************************************/
|
|
0
|
312
|
|
|
313 /* unwind-protect used by call_debugger() to restore the value of
|
|
380
|
314 entering_debugger. (We cannot use specbind() because the
|
|
0
|
315 variable is not Lisp-accessible.) */
|
|
|
316
|
|
|
317 static Lisp_Object
|
|
|
318 restore_entering_debugger (Lisp_Object arg)
|
|
|
319 {
|
|
179
|
320 entering_debugger = ! NILP (arg);
|
|
0
|
321 return arg;
|
|
|
322 }
|
|
|
323
|
|
|
324 /* Actually call the debugger. ARG is a list of args that will be
|
|
|
325 passed to the debugger function, as follows;
|
|
|
326
|
|
|
327 If due to frame exit, args are `exit' and the value being returned;
|
|
|
328 this function's value will be returned instead of that.
|
|
|
329 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
330 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
331 If due to `eval' entry, one arg, t.
|
|
|
332
|
|
|
333 */
|
|
|
334
|
|
|
335 static Lisp_Object
|
|
|
336 call_debugger_259 (Lisp_Object arg)
|
|
|
337 {
|
|
|
338 return apply1 (Vdebugger, arg);
|
|
|
339 }
|
|
|
340
|
|
|
341 /* Call the debugger, doing some encapsulation. We make sure we have
|
|
380
|
342 some room on the eval and specpdl stacks, and bind entering_debugger
|
|
0
|
343 to 1 during this call. This is used to trap errors that may occur
|
|
380
|
344 when entering the debugger (e.g. the value of `debugger' is invalid),
|
|
0
|
345 so that the debugger will not be recursively entered if debug-on-error
|
|
|
346 is set. (Otherwise, XEmacs would infinitely recurse, attempting to
|
|
380
|
347 enter the debugger.) entering_debugger gets reset to 0 as soon
|
|
0
|
348 as a backtrace is displayed, so that further errors can indeed be
|
|
|
349 handled normally.
|
|
|
350
|
|
|
351 We also establish a catch for 'debugger. If the debugger function
|
|
|
352 throws to this instead of returning a value, it means that the user
|
|
|
353 pressed 'c' (pretend like the debugger was never entered). The
|
|
|
354 function then returns Qunbound. (If the user pressed 'r', for
|
|
|
355 return a value, then the debugger function returns normally with
|
|
|
356 this value.)
|
|
|
357
|
|
|
358 The difference between 'c' and 'r' is as follows:
|
|
|
359
|
|
|
360 debug-on-call:
|
|
|
361 No difference. The call proceeds as normal.
|
|
|
362 debug-on-exit:
|
|
|
363 With 'r', the specified value is returned as the function's
|
|
|
364 return value. With 'c', the value that would normally be
|
|
|
365 returned is returned.
|
|
|
366 signal:
|
|
|
367 With 'r', the specified value is returned as the return
|
|
|
368 value of `signal'. (This is the only time that `signal'
|
|
|
369 can return, instead of making a non-local exit.) With `c',
|
|
|
370 `signal' will continue looking for handlers as if the
|
|
|
371 debugger was never entered, and will probably end up
|
|
|
372 throwing to a handler or to top-level.
|
|
|
373 */
|
|
|
374
|
|
|
375 static Lisp_Object
|
|
|
376 call_debugger (Lisp_Object arg)
|
|
|
377 {
|
|
|
378 int threw;
|
|
|
379 Lisp_Object val;
|
|
|
380 int speccount;
|
|
|
381
|
|
|
382 if (lisp_eval_depth + 20 > max_lisp_eval_depth)
|
|
|
383 max_lisp_eval_depth = lisp_eval_depth + 20;
|
|
|
384 if (specpdl_size + 40 > max_specpdl_size)
|
|
|
385 max_specpdl_size = specpdl_size + 40;
|
|
|
386 debug_on_next_call = 0;
|
|
|
387
|
|
380
|
388 speccount = specpdl_depth();
|
|
185
|
389 record_unwind_protect (restore_entering_debugger,
|
|
0
|
390 (entering_debugger ? Qt : Qnil));
|
|
|
391 entering_debugger = 1;
|
|
|
392 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw);
|
|
|
393
|
|
185
|
394 return unbind_to (speccount, ((threw)
|
|
179
|
395 ? Qunbound /* Not returning a value */
|
|
|
396 : val));
|
|
0
|
397 }
|
|
|
398
|
|
|
399 /* Called when debug-on-exit behavior is called for. Enter the debugger
|
|
|
400 with the appropriate args for this. VAL is the exit value that is
|
|
|
401 about to be returned. */
|
|
|
402
|
|
|
403 static Lisp_Object
|
|
|
404 do_debug_on_exit (Lisp_Object val)
|
|
|
405 {
|
|
|
406 /* This is falsified by call_debugger */
|
|
|
407 Lisp_Object v = call_debugger (list2 (Qexit, val));
|
|
94
|
408
|
|
173
|
409 return !UNBOUNDP (v) ? v : val;
|
|
0
|
410 }
|
|
|
411
|
|
|
412 /* Called when debug-on-call behavior is called for. Enter the debugger
|
|
|
413 with the appropriate args for this. VAL is either t for a call
|
|
|
414 through `eval' or 'lambda for a call through `funcall'.
|
|
|
415
|
|
|
416 #### The differentiation here between EVAL and FUNCALL is bogus.
|
|
|
417 FUNCALL can be defined as
|
|
|
418
|
|
|
419 (defmacro func (fun &rest args)
|
|
|
420 (cons (eval fun) args))
|
|
|
421
|
|
|
422 and should be treated as such.
|
|
|
423 */
|
|
|
424
|
|
|
425 static void
|
|
|
426 do_debug_on_call (Lisp_Object code)
|
|
|
427 {
|
|
|
428 debug_on_next_call = 0;
|
|
|
429 backtrace_list->debug_on_exit = 1;
|
|
|
430 call_debugger (list1 (code));
|
|
|
431 }
|
|
|
432
|
|
|
433 /* LIST is the value of one of the variables `debug-on-error',
|
|
|
434 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal',
|
|
|
435 and CONDITIONS is the list of error conditions associated with
|
|
|
436 the error being signalled. This returns non-nil if LIST
|
|
|
437 matches CONDITIONS. (A nil value for LIST does not match
|
|
|
438 CONDITIONS. A non-list value for LIST does match CONDITIONS.
|
|
|
439 A list matches CONDITIONS when one of the symbols in LIST is the
|
|
|
440 same as one of the symbols in CONDITIONS.) */
|
|
|
441
|
|
|
442 static int
|
|
|
443 wants_debugger (Lisp_Object list, Lisp_Object conditions)
|
|
|
444 {
|
|
|
445 if (NILP (list))
|
|
|
446 return 0;
|
|
|
447 if (! CONSP (list))
|
|
|
448 return 1;
|
|
|
449
|
|
|
450 while (CONSP (conditions))
|
|
|
451 {
|
|
|
452 Lisp_Object this, tail;
|
|
|
453 this = XCAR (conditions);
|
|
|
454 for (tail = list; CONSP (tail); tail = XCDR (tail))
|
|
|
455 if (EQ (XCAR (tail), this))
|
|
|
456 return 1;
|
|
|
457 conditions = XCDR (conditions);
|
|
|
458 }
|
|
|
459 return 0;
|
|
|
460 }
|
|
|
461
|
|
163
|
462
|
|
|
463 /* Return 1 if an error with condition-symbols CONDITIONS,
|
|
|
464 and described by SIGNAL-DATA, should skip the debugger
|
|
|
465 according to debugger-ignore-errors. */
|
|
|
466
|
|
|
467 static int
|
|
|
468 skip_debugger (Lisp_Object conditions, Lisp_Object data)
|
|
|
469 {
|
|
167
|
470 /* This function can GC */
|
|
163
|
471 Lisp_Object tail;
|
|
|
472 int first_string = 1;
|
|
173
|
473 Lisp_Object error_message = Qnil;
|
|
163
|
474
|
|
|
475 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail))
|
|
|
476 {
|
|
|
477 if (STRINGP (XCAR (tail)))
|
|
|
478 {
|
|
|
479 if (first_string)
|
|
|
480 {
|
|
165
|
481 error_message = Ferror_message_string (data);
|
|
163
|
482 first_string = 0;
|
|
|
483 }
|
|
167
|
484 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0)
|
|
163
|
485 return 1;
|
|
|
486 }
|
|
|
487 else
|
|
|
488 {
|
|
|
489 Lisp_Object contail;
|
|
|
490
|
|
|
491 for (contail = conditions; CONSP (contail); contail = XCDR (contail))
|
|
167
|
492 if (EQ (XCAR (tail), XCAR (contail)))
|
|
163
|
493 return 1;
|
|
|
494 }
|
|
|
495 }
|
|
|
496
|
|
|
497 return 0;
|
|
|
498 }
|
|
|
499
|
|
0
|
500 /* Actually generate a backtrace on STREAM. */
|
|
|
501
|
|
|
502 static Lisp_Object
|
|
|
503 backtrace_259 (Lisp_Object stream)
|
|
|
504 {
|
|
173
|
505 return Fbacktrace (stream, Qt);
|
|
0
|
506 }
|
|
|
507
|
|
272
|
508 /* An error was signaled. Maybe call the debugger, if the `debug-on-error'
|
|
0
|
509 etc. variables call for this. CONDITIONS is the list of conditions
|
|
|
510 associated with the error being signalled. SIG is the actual error
|
|
|
511 being signalled, and DATA is the associated data (these are exactly
|
|
|
512 the same as the arguments to `signal'). ACTIVE_HANDLERS is the
|
|
|
513 list of error handlers that are to be put in place while the debugger
|
|
|
514 is called. This is generally the remaining handlers that are
|
|
|
515 outside of the innermost handler trapping this error. This way,
|
|
|
516 if the same error occurs inside of the debugger, you usually don't get
|
|
|
517 the debugger entered recursively.
|
|
|
518
|
|
|
519 This function returns Qunbound if it didn't call the debugger or if
|
|
|
520 the user asked (through 'c') that XEmacs should pretend like the
|
|
|
521 debugger was never entered. Otherwise, it returns the value
|
|
|
522 that the user specified with `r'. (Note that much of the time,
|
|
|
523 the user will abort with C-], and we will never have a chance to
|
|
|
524 return anything at all.)
|
|
|
525
|
|
|
526 SIGNAL_VARS_ONLY means we should only look at debug-on-signal
|
|
|
527 and stack-trace-on-signal to control whether we do anything.
|
|
|
528 This is so that debug-on-error doesn't make handled errors
|
|
|
529 cause the debugger to get invoked.
|
|
|
530
|
|
|
531 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that
|
|
|
532 those functions aren't done more than once in a single `signal'
|
|
|
533 session. */
|
|
|
534
|
|
|
535 static Lisp_Object
|
|
|
536 signal_call_debugger (Lisp_Object conditions,
|
|
|
537 Lisp_Object sig, Lisp_Object data,
|
|
|
538 Lisp_Object active_handlers,
|
|
|
539 int signal_vars_only,
|
|
|
540 int *stack_trace_displayed,
|
|
|
541 int *debugger_entered)
|
|
|
542 {
|
|
|
543 /* This function can GC */
|
|
|
544 Lisp_Object val = Qunbound;
|
|
|
545 Lisp_Object all_handlers = Vcondition_handlers;
|
|
167
|
546 Lisp_Object temp_data = Qnil;
|
|
380
|
547 int speccount = specpdl_depth();
|
|
167
|
548 struct gcpro gcpro1, gcpro2;
|
|
|
549 GCPRO2 (all_handlers, temp_data);
|
|
0
|
550
|
|
|
551 Vcondition_handlers = active_handlers;
|
|
|
552
|
|
167
|
553 temp_data = Fcons (sig, data); /* needed for skip_debugger */
|
|
163
|
554
|
|
|
555 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only
|
|
167
|
556 && wants_debugger (Vstack_trace_on_error, conditions)
|
|
|
557 && !skip_debugger (conditions, temp_data))
|
|
0
|
558 {
|
|
380
|
559 specbind (Qdebug_on_error, Qnil);
|
|
|
560 specbind (Qstack_trace_on_error, Qnil);
|
|
|
561 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
562 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
563
|
|
380
|
564 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
0
|
565 backtrace_259,
|
|
|
566 Qnil,
|
|
|
567 Qnil);
|
|
|
568 unbind_to (speccount, Qnil);
|
|
|
569 *stack_trace_displayed = 1;
|
|
|
570 }
|
|
185
|
571
|
|
0
|
572 if (!entering_debugger && !*debugger_entered && !signal_vars_only
|
|
|
573 && (EQ (sig, Qquit)
|
|
|
574 ? debug_on_quit
|
|
167
|
575 : wants_debugger (Vdebug_on_error, conditions))
|
|
|
576 && !skip_debugger (conditions, temp_data))
|
|
0
|
577 {
|
|
|
578 debug_on_quit &= ~2; /* reset critical bit */
|
|
380
|
579 specbind (Qdebug_on_error, Qnil);
|
|
|
580 specbind (Qstack_trace_on_error, Qnil);
|
|
|
581 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
582 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
583
|
|
0
|
584 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
585 *debugger_entered = 1;
|
|
|
586 }
|
|
|
587
|
|
|
588 if (!entering_debugger && !*stack_trace_displayed
|
|
|
589 && wants_debugger (Vstack_trace_on_signal, conditions))
|
|
|
590 {
|
|
380
|
591 specbind (Qdebug_on_error, Qnil);
|
|
|
592 specbind (Qstack_trace_on_error, Qnil);
|
|
|
593 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
594 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
595
|
|
380
|
596 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"),
|
|
0
|
597 backtrace_259,
|
|
|
598 Qnil,
|
|
|
599 Qnil);
|
|
|
600 unbind_to (speccount, Qnil);
|
|
|
601 *stack_trace_displayed = 1;
|
|
|
602 }
|
|
|
603
|
|
|
604 if (!entering_debugger && !*debugger_entered
|
|
|
605 && (EQ (sig, Qquit)
|
|
|
606 ? debug_on_quit
|
|
|
607 : wants_debugger (Vdebug_on_signal, conditions)))
|
|
|
608 {
|
|
|
609 debug_on_quit &= ~2; /* reset critical bit */
|
|
380
|
610 specbind (Qdebug_on_error, Qnil);
|
|
|
611 specbind (Qstack_trace_on_error, Qnil);
|
|
|
612 specbind (Qdebug_on_signal, Qnil);
|
|
0
|
613 specbind (Qstack_trace_on_signal, Qnil);
|
|
185
|
614
|
|
0
|
615 val = call_debugger (list2 (Qerror, (Fcons (sig, data))));
|
|
|
616 *debugger_entered = 1;
|
|
|
617 }
|
|
|
618
|
|
|
619 UNGCPRO;
|
|
|
620 Vcondition_handlers = all_handlers;
|
|
173
|
621 return unbind_to (speccount, val);
|
|
0
|
622 }
|
|
|
623
|
|
|
624
|
|
380
|
625 /************************************************************************/
|
|
|
626 /* The basic special forms */
|
|
|
627 /************************************************************************/
|
|
|
628
|
|
|
629 /* Except for Fprogn(), the basic special forms below are only called
|
|
|
630 from interpreted code. The byte compiler turns them into bytecodes. */
|
|
0
|
631
|
|
20
|
632 DEFUN ("or", For, 0, UNEVALLED, 0, /*
|
|
0
|
633 Eval args until one of them yields non-nil, then return that value.
|
|
|
634 The remaining args are not evalled at all.
|
|
|
635 If all args return nil, return nil.
|
|
20
|
636 */
|
|
|
637 (args))
|
|
0
|
638 {
|
|
|
639 /* This function can GC */
|
|
380
|
640 REGISTER Lisp_Object arg, val;
|
|
|
641
|
|
|
642 LIST_LOOP_2 (arg, args)
|
|
0
|
643 {
|
|
380
|
644 if (!NILP (val = Feval (arg)))
|
|
|
645 return val;
|
|
0
|
646 }
|
|
|
647
|
|
272
|
648 return Qnil;
|
|
0
|
649 }
|
|
|
650
|
|
20
|
651 DEFUN ("and", Fand, 0, UNEVALLED, 0, /*
|
|
0
|
652 Eval args until one of them yields nil, then return nil.
|
|
|
653 The remaining args are not evalled at all.
|
|
|
654 If no arg yields nil, return the last arg's value.
|
|
20
|
655 */
|
|
|
656 (args))
|
|
0
|
657 {
|
|
|
658 /* This function can GC */
|
|
380
|
659 REGISTER Lisp_Object arg, val = Qt;
|
|
|
660
|
|
|
661 LIST_LOOP_2 (arg, args)
|
|
0
|
662 {
|
|
380
|
663 if (NILP (val = Feval (arg)))
|
|
|
664 return val;
|
|
0
|
665 }
|
|
|
666
|
|
|
667 return val;
|
|
|
668 }
|
|
|
669
|
|
20
|
670 DEFUN ("if", Fif, 2, UNEVALLED, 0, /*
|
|
272
|
671 \(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...
|
|
0
|
672 Returns the value of THEN or the value of the last of the ELSE's.
|
|
|
673 THEN must be one expression, but ELSE... can be zero or more expressions.
|
|
|
674 If COND yields nil, and there are no ELSE's, the value is nil.
|
|
20
|
675 */
|
|
272
|
676 (args))
|
|
0
|
677 {
|
|
|
678 /* This function can GC */
|
|
380
|
679 Lisp_Object condition = XCAR (args);
|
|
|
680 Lisp_Object then_form = XCAR (XCDR (args));
|
|
|
681 Lisp_Object else_forms = XCDR (XCDR (args));
|
|
|
682
|
|
|
683 if (!NILP (Feval (condition)))
|
|
|
684 return Feval (then_form);
|
|
272
|
685 else
|
|
380
|
686 return Fprogn (else_forms);
|
|
|
687 }
|
|
|
688
|
|
|
689 /* Macros `when' and `unless' are trivially defined in Lisp,
|
|
|
690 but it helps for bootstrapping to have them ALWAYS defined. */
|
|
|
691
|
|
|
692 DEFUN ("when", Fwhen, 1, MANY, 0, /*
|
|
|
693 \(when COND BODY...): if COND yields non-nil, do BODY, else return nil.
|
|
|
694 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
695 */
|
|
|
696 (int nargs, Lisp_Object *args))
|
|
|
697 {
|
|
|
698 Lisp_Object cond = args[0];
|
|
|
699 Lisp_Object body;
|
|
|
700
|
|
|
701 switch (nargs)
|
|
|
702 {
|
|
|
703 case 1: body = Qnil; break;
|
|
|
704 case 2: body = args[1]; break;
|
|
|
705 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break;
|
|
|
706 }
|
|
|
707
|
|
|
708 return list3 (Qif, cond, body);
|
|
|
709 }
|
|
|
710
|
|
|
711 DEFUN ("unless", Funless, 1, MANY, 0, /*
|
|
|
712 \(unless COND BODY...): if COND yields nil, do BODY, else return nil.
|
|
|
713 BODY can be zero or more expressions. If BODY is nil, return nil.
|
|
|
714 */
|
|
|
715 (int nargs, Lisp_Object *args))
|
|
|
716 {
|
|
|
717 Lisp_Object cond = args[0];
|
|
|
718 Lisp_Object body = Flist (nargs-1, args+1);
|
|
|
719 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body)));
|
|
0
|
720 }
|
|
|
721
|
|
20
|
722 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /*
|
|
0
|
723 (cond CLAUSES...): try each clause until one succeeds.
|
|
|
724 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
|
|
|
725 and, if the value is non-nil, this clause succeeds:
|
|
|
726 then the expressions in BODY are evaluated and the last one's
|
|
|
727 value is the value of the cond-form.
|
|
|
728 If no clause succeeds, cond returns nil.
|
|
|
729 If a clause has one element, as in (CONDITION),
|
|
|
730 CONDITION's value if non-nil is returned from the cond-form.
|
|
20
|
731 */
|
|
|
732 (args))
|
|
0
|
733 {
|
|
|
734 /* This function can GC */
|
|
380
|
735 REGISTER Lisp_Object val, clause;
|
|
|
736
|
|
|
737 LIST_LOOP_2 (clause, args)
|
|
0
|
738 {
|
|
272
|
739 CHECK_CONS (clause);
|
|
380
|
740 if (!NILP (val = Feval (XCAR (clause))))
|
|
0
|
741 {
|
|
380
|
742 if (!NILP (clause = XCDR (clause)))
|
|
272
|
743 {
|
|
380
|
744 CHECK_TRUE_LIST (clause);
|
|
|
745 val = Fprogn (clause);
|
|
272
|
746 }
|
|
|
747 return val;
|
|
0
|
748 }
|
|
|
749 }
|
|
|
750
|
|
272
|
751 return Qnil;
|
|
0
|
752 }
|
|
|
753
|
|
20
|
754 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /*
|
|
272
|
755 \(progn BODY...): eval BODY forms sequentially and return value of last one.
|
|
20
|
756 */
|
|
|
757 (args))
|
|
0
|
758 {
|
|
|
759 /* This function can GC */
|
|
380
|
760 /* Caller must provide a true list in ARGS */
|
|
|
761 REGISTER Lisp_Object form, val = Qnil;
|
|
0
|
762 struct gcpro gcpro1;
|
|
|
763
|
|
243
|
764 GCPRO1 (args);
|
|
|
765
|
|
380
|
766 {
|
|
|
767 LIST_LOOP_2 (form, args)
|
|
|
768 val = Feval (form);
|
|
|
769 }
|
|
0
|
770
|
|
|
771 UNGCPRO;
|
|
|
772 return val;
|
|
|
773 }
|
|
|
774
|
|
380
|
775 /* Fprog1() is the canonical example of a function that must GCPRO a
|
|
|
776 Lisp_Object across calls to Feval(). */
|
|
|
777
|
|
20
|
778 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /*
|
|
380
|
779 Similar to `progn', but the value of the first form is returned.
|
|
|
780 \(prog1 FIRST BODY...): All the arguments are evaluated sequentially.
|
|
|
781 The value of FIRST is saved during evaluation of the remaining args,
|
|
0
|
782 whose values are discarded.
|
|
20
|
783 */
|
|
|
784 (args))
|
|
0
|
785 {
|
|
|
786 /* This function can GC */
|
|
380
|
787 REGISTER Lisp_Object val, form;
|
|
|
788 struct gcpro gcpro1;
|
|
|
789
|
|
|
790 val = Feval (XCAR (args));
|
|
|
791
|
|
|
792 GCPRO1 (val);
|
|
|
793
|
|
|
794 {
|
|
|
795 LIST_LOOP_2 (form, XCDR (args))
|
|
|
796 Feval (form);
|
|
|
797 }
|
|
0
|
798
|
|
|
799 UNGCPRO;
|
|
|
800 return val;
|
|
|
801 }
|
|
|
802
|
|
20
|
803 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /*
|
|
380
|
804 Similar to `progn', but the value of the second form is returned.
|
|
|
805 \(prog2 FIRST SECOND BODY...): All the arguments are evaluated sequentially.
|
|
|
806 The value of SECOND is saved during evaluation of the remaining args,
|
|
0
|
807 whose values are discarded.
|
|
20
|
808 */
|
|
|
809 (args))
|
|
0
|
810 {
|
|
|
811 /* This function can GC */
|
|
380
|
812 REGISTER Lisp_Object val, form, tail;
|
|
|
813 struct gcpro gcpro1;
|
|
|
814
|
|
|
815 Feval (XCAR (args));
|
|
|
816 args = XCDR (args);
|
|
|
817 val = Feval (XCAR (args));
|
|
|
818 args = XCDR (args);
|
|
|
819
|
|
|
820 GCPRO1 (val);
|
|
|
821
|
|
|
822 LIST_LOOP_3 (form, args, tail)
|
|
|
823 Feval (form);
|
|
0
|
824
|
|
|
825 UNGCPRO;
|
|
|
826 return val;
|
|
|
827 }
|
|
|
828
|
|
20
|
829 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /*
|
|
272
|
830 \(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
831 The value of the last form in BODY is returned.
|
|
|
832 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
833 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
834 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
|
|
20
|
835 */
|
|
|
836 (args))
|
|
0
|
837 {
|
|
|
838 /* This function can GC */
|
|
380
|
839 Lisp_Object var, tail;
|
|
272
|
840 Lisp_Object varlist = XCAR (args);
|
|
380
|
841 Lisp_Object body = XCDR (args);
|
|
|
842 int speccount = specpdl_depth();
|
|
|
843
|
|
|
844 EXTERNAL_LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
845 {
|
|
380
|
846 Lisp_Object symbol, value, tem;
|
|
|
847 if (SYMBOLP (var))
|
|
|
848 symbol = var, value = Qnil;
|
|
0
|
849 else
|
|
|
850 {
|
|
380
|
851 CHECK_CONS (var);
|
|
|
852 symbol = XCAR (var);
|
|
|
853 tem = XCDR (var);
|
|
|
854 if (NILP (tem))
|
|
|
855 value = Qnil;
|
|
272
|
856 else
|
|
|
857 {
|
|
380
|
858 CHECK_CONS (tem);
|
|
|
859 value = Feval (XCAR (tem));
|
|
|
860 if (!NILP (XCDR (tem)))
|
|
272
|
861 signal_simple_error
|
|
380
|
862 ("`let' bindings can have only one value-form", var);
|
|
272
|
863 }
|
|
0
|
864 }
|
|
380
|
865 specbind (symbol, value);
|
|
0
|
866 }
|
|
380
|
867 return unbind_to (speccount, Fprogn (body));
|
|
0
|
868 }
|
|
|
869
|
|
20
|
870 DEFUN ("let", Flet, 1, UNEVALLED, 0, /*
|
|
272
|
871 \(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.
|
|
0
|
872 The value of the last form in BODY is returned.
|
|
|
873 Each element of VARLIST is a symbol (which is bound to nil)
|
|
|
874 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
|
|
|
875 All the VALUEFORMs are evalled before any symbols are bound.
|
|
20
|
876 */
|
|
|
877 (args))
|
|
0
|
878 {
|
|
|
879 /* This function can GC */
|
|
380
|
880 Lisp_Object var, tail;
|
|
272
|
881 Lisp_Object varlist = XCAR (args);
|
|
380
|
882 Lisp_Object body = XCDR (args);
|
|
|
883 int speccount = specpdl_depth();
|
|
272
|
884 Lisp_Object *temps;
|
|
380
|
885 int idx;
|
|
|
886 struct gcpro gcpro1;
|
|
0
|
887
|
|
272
|
888 /* Make space to hold the values to give the bound variables. */
|
|
|
889 {
|
|
380
|
890 int varcount;
|
|
|
891 GET_EXTERNAL_LIST_LENGTH (varlist, varcount);
|
|
272
|
892 temps = alloca_array (Lisp_Object, varcount);
|
|
|
893 }
|
|
0
|
894
|
|
|
895 /* Compute the values and store them in `temps' */
|
|
380
|
896 GCPRO1 (*temps);
|
|
|
897 gcpro1.nvars = 0;
|
|
|
898
|
|
|
899 idx = 0;
|
|
|
900 LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
901 {
|
|
380
|
902 Lisp_Object *value = &temps[idx++];
|
|
|
903 if (SYMBOLP (var))
|
|
|
904 *value = Qnil;
|
|
0
|
905 else
|
|
272
|
906 {
|
|
380
|
907 Lisp_Object tem;
|
|
|
908 CHECK_CONS (var);
|
|
|
909 tem = XCDR (var);
|
|
|
910 if (NILP (tem))
|
|
|
911 *value = Qnil;
|
|
272
|
912 else
|
|
|
913 {
|
|
380
|
914 CHECK_CONS (tem);
|
|
|
915 *value = Feval (XCAR (tem));
|
|
|
916 gcpro1.nvars = idx;
|
|
|
917
|
|
|
918 if (!NILP (XCDR (tem)))
|
|
272
|
919 signal_simple_error
|
|
380
|
920 ("`let' bindings can have only one value-form", var);
|
|
272
|
921 }
|
|
|
922 }
|
|
0
|
923 }
|
|
380
|
924
|
|
|
925 idx = 0;
|
|
|
926 LIST_LOOP_3 (var, varlist, tail)
|
|
0
|
927 {
|
|
380
|
928 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]);
|
|
0
|
929 }
|
|
|
930
|
|
380
|
931 UNGCPRO;
|
|
|
932
|
|
|
933 return unbind_to (speccount, Fprogn (body));
|
|
0
|
934 }
|
|
|
935
|
|
20
|
936 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /*
|
|
272
|
937 \(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.
|
|
0
|
938 The order of execution is thus TEST, BODY, TEST, BODY and so on
|
|
|
939 until TEST returns nil.
|
|
20
|
940 */
|
|
243
|
941 (args))
|
|
0
|
942 {
|
|
|
943 /* This function can GC */
|
|
272
|
944 Lisp_Object test = XCAR (args);
|
|
|
945 Lisp_Object body = XCDR (args);
|
|
380
|
946
|
|
|
947 while (!NILP (Feval (test)))
|
|
0
|
948 {
|
|
|
949 QUIT;
|
|
|
950 Fprogn (body);
|
|
|
951 }
|
|
|
952
|
|
|
953 return Qnil;
|
|
|
954 }
|
|
|
955
|
|
20
|
956 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /*
|
|
272
|
957 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.
|
|
0
|
958 The symbols SYM are variables; they are literal (not evaluated).
|
|
|
959 The values VAL are expressions; they are evaluated.
|
|
|
960 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
|
|
|
961 The second VAL is not computed until after the first SYM is set, and so on;
|
|
|
962 each VAL can use the new value of variables set earlier in the `setq'.
|
|
|
963 The return value of the `setq' form is the value of the last VAL.
|
|
20
|
964 */
|
|
|
965 (args))
|
|
0
|
966 {
|
|
|
967 /* This function can GC */
|
|
380
|
968 Lisp_Object symbol, tail, val = Qnil;
|
|
|
969 int nargs;
|
|
0
|
970 struct gcpro gcpro1;
|
|
380
|
971
|
|
|
972 GET_LIST_LENGTH (args, nargs);
|
|
|
973
|
|
|
974 if (nargs & 1) /* Odd number of arguments? */
|
|
|
975 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs)));
|
|
|
976
|
|
|
977 GCPRO1 (val);
|
|
|
978
|
|
|
979 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
0
|
980 {
|
|
380
|
981 val = Feval (val);
|
|
|
982 Fset (symbol, val);
|
|
0
|
983 }
|
|
|
984
|
|
|
985 UNGCPRO;
|
|
|
986 return val;
|
|
|
987 }
|
|
185
|
988
|
|
20
|
989 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /*
|
|
0
|
990 Return the argument, without evaluating it. `(quote x)' yields `x'.
|
|
20
|
991 */
|
|
|
992 (args))
|
|
0
|
993 {
|
|
272
|
994 return XCAR (args);
|
|
0
|
995 }
|
|
185
|
996
|
|
20
|
997 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /*
|
|
0
|
998 Like `quote', but preferred for objects which are functions.
|
|
|
999 In byte compilation, `function' causes its argument to be compiled.
|
|
|
1000 `quote' cannot do that.
|
|
20
|
1001 */
|
|
|
1002 (args))
|
|
0
|
1003 {
|
|
272
|
1004 return XCAR (args);
|
|
0
|
1005 }
|
|
|
1006
|
|
|
1007
|
|
380
|
1008 /************************************************************************/
|
|
|
1009 /* Defining functions/variables */
|
|
|
1010 /************************************************************************/
|
|
|
1011 static Lisp_Object
|
|
|
1012 define_function (Lisp_Object name, Lisp_Object defn)
|
|
|
1013 {
|
|
|
1014 Ffset (name, defn);
|
|
|
1015 LOADHIST_ATTACH (name);
|
|
|
1016 return name;
|
|
|
1017 }
|
|
0
|
1018
|
|
20
|
1019 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /*
|
|
272
|
1020 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.
|
|
0
|
1021 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1022 See also the function `interactive'.
|
|
20
|
1023 */
|
|
|
1024 (args))
|
|
0
|
1025 {
|
|
|
1026 /* This function can GC */
|
|
380
|
1027 return define_function (XCAR (args),
|
|
|
1028 Fcons (Qlambda, XCDR (args)));
|
|
0
|
1029 }
|
|
|
1030
|
|
20
|
1031 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /*
|
|
272
|
1032 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.
|
|
0
|
1033 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
|
|
|
1034 When the macro is called, as in (NAME ARGS...),
|
|
|
1035 the function (lambda ARGLIST BODY...) is applied to
|
|
|
1036 the list ARGS... as it appears in the expression,
|
|
|
1037 and the result should be a form to be evaluated instead of the original.
|
|
20
|
1038 */
|
|
|
1039 (args))
|
|
0
|
1040 {
|
|
|
1041 /* This function can GC */
|
|
380
|
1042 return define_function (XCAR (args),
|
|
|
1043 Fcons (Qmacro, Fcons (Qlambda, XCDR (args))));
|
|
0
|
1044 }
|
|
|
1045
|
|
20
|
1046 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /*
|
|
272
|
1047 \(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.
|
|
0
|
1048 You are not required to define a variable in order to use it,
|
|
|
1049 but the definition can supply documentation and an initial value
|
|
|
1050 in a way that tags can recognize.
|
|
|
1051
|
|
|
1052 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is
|
|
|
1053 void. (However, when you evaluate a defvar interactively, it acts like a
|
|
|
1054 defconst: SYMBOL's value is always set regardless of whether it's currently
|
|
|
1055 void.)
|
|
|
1056 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1057 buffer-local values are not affected.
|
|
|
1058 INITVALUE and DOCSTRING are optional.
|
|
|
1059 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
410
|
1060 This means that M-x set-variable recognizes it.
|
|
0
|
1061 If INITVALUE is missing, SYMBOL's value is not set.
|
|
|
1062
|
|
|
1063 In lisp-interaction-mode defvar is treated as defconst.
|
|
20
|
1064 */
|
|
|
1065 (args))
|
|
0
|
1066 {
|
|
|
1067 /* This function can GC */
|
|
272
|
1068 Lisp_Object sym = XCAR (args);
|
|
|
1069
|
|
|
1070 if (!NILP (args = XCDR (args)))
|
|
0
|
1071 {
|
|
272
|
1072 Lisp_Object val = XCAR (args);
|
|
|
1073
|
|
|
1074 if (NILP (Fdefault_boundp (sym)))
|
|
380
|
1075 {
|
|
|
1076 struct gcpro gcpro1;
|
|
|
1077 GCPRO1 (val);
|
|
|
1078 val = Feval (val);
|
|
|
1079 Fset_default (sym, val);
|
|
|
1080 UNGCPRO;
|
|
|
1081 }
|
|
272
|
1082
|
|
|
1083 if (!NILP (args = XCDR (args)))
|
|
|
1084 {
|
|
|
1085 Lisp_Object doc = XCAR (args);
|
|
|
1086 Fput (sym, Qvariable_documentation, doc);
|
|
|
1087 if (!NILP (args = XCDR (args)))
|
|
|
1088 error ("too many arguments");
|
|
|
1089 }
|
|
0
|
1090 }
|
|
|
1091
|
|
|
1092 #ifdef I18N3
|
|
|
1093 if (!NILP (Vfile_domain))
|
|
398
|
1094 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
0
|
1095 #endif
|
|
|
1096
|
|
|
1097 LOADHIST_ATTACH (sym);
|
|
|
1098 return sym;
|
|
|
1099 }
|
|
|
1100
|
|
20
|
1101 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /*
|
|
272
|
1102 \(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant
|
|
0
|
1103 variable.
|
|
|
1104 The intent is that programs do not change this value, but users may.
|
|
|
1105 Always sets the value of SYMBOL to the result of evalling INITVALUE.
|
|
|
1106 If SYMBOL is buffer-local, its default value is what is set;
|
|
|
1107 buffer-local values are not affected.
|
|
|
1108 DOCSTRING is optional.
|
|
|
1109 If DOCSTRING starts with *, this variable is identified as a user option.
|
|
410
|
1110 This means that M-x set-variable recognizes it.
|
|
0
|
1111
|
|
|
1112 Note: do not use `defconst' for user options in libraries that are not
|
|
|
1113 normally loaded, since it is useful for users to be able to specify
|
|
|
1114 their own values for such variables before loading the library.
|
|
|
1115 Since `defconst' unconditionally assigns the variable,
|
|
|
1116 it would override the user's choice.
|
|
20
|
1117 */
|
|
|
1118 (args))
|
|
0
|
1119 {
|
|
|
1120 /* This function can GC */
|
|
272
|
1121 Lisp_Object sym = XCAR (args);
|
|
380
|
1122 Lisp_Object val = Feval (XCAR (args = XCDR (args)));
|
|
|
1123 struct gcpro gcpro1;
|
|
|
1124
|
|
|
1125 GCPRO1 (val);
|
|
|
1126
|
|
|
1127 Fset_default (sym, val);
|
|
|
1128
|
|
|
1129 UNGCPRO;
|
|
272
|
1130
|
|
|
1131 if (!NILP (args = XCDR (args)))
|
|
|
1132 {
|
|
|
1133 Lisp_Object doc = XCAR (args);
|
|
|
1134 Fput (sym, Qvariable_documentation, doc);
|
|
|
1135 if (!NILP (args = XCDR (args)))
|
|
|
1136 error ("too many arguments");
|
|
|
1137 }
|
|
0
|
1138
|
|
|
1139 #ifdef I18N3
|
|
|
1140 if (!NILP (Vfile_domain))
|
|
398
|
1141 Fput (sym, Qvariable_domain, Vfile_domain);
|
|
0
|
1142 #endif
|
|
|
1143
|
|
|
1144 LOADHIST_ATTACH (sym);
|
|
|
1145 return sym;
|
|
|
1146 }
|
|
|
1147
|
|
20
|
1148 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /*
|
|
0
|
1149 Return t if VARIABLE is intended to be set and modified by users.
|
|
|
1150 \(The alternative is a variable used internally in a Lisp program.)
|
|
|
1151 Determined by whether the first character of the documentation
|
|
|
1152 for the variable is `*'.
|
|
20
|
1153 */
|
|
|
1154 (variable))
|
|
0
|
1155 {
|
|
380
|
1156 Lisp_Object documentation = Fget (variable, Qvariable_documentation, Qnil);
|
|
|
1157
|
|
|
1158 return
|
|
|
1159 ((INTP (documentation) && XINT (documentation) < 0) ||
|
|
|
1160
|
|
398
|
1161 (STRINGP (documentation) &&
|
|
380
|
1162 (string_byte (XSTRING (documentation), 0) == '*')) ||
|
|
|
1163
|
|
|
1164 /* If (STRING . INTEGER), a negative integer means a user variable. */
|
|
|
1165 (CONSP (documentation)
|
|
0
|
1166 && STRINGP (XCAR (documentation))
|
|
|
1167 && INTP (XCDR (documentation))
|
|
380
|
1168 && XINT (XCDR (documentation)) < 0)) ?
|
|
|
1169 Qt : Qnil;
|
|
185
|
1170 }
|
|
0
|
1171
|
|
20
|
1172 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /*
|
|
0
|
1173 Return result of expanding macros at top level of FORM.
|
|
|
1174 If FORM is not a macro call, it is returned unchanged.
|
|
|
1175 Otherwise, the macro is expanded and the expansion is considered
|
|
|
1176 in place of FORM. When a non-macro-call results, it is returned.
|
|
|
1177
|
|
371
|
1178 The second optional arg ENVIRONMENT species an environment of macro
|
|
0
|
1179 definitions to shadow the loaded ones for use in file byte-compilation.
|
|
20
|
1180 */
|
|
371
|
1181 (form, env))
|
|
0
|
1182 {
|
|
|
1183 /* This function can GC */
|
|
|
1184 /* With cleanups from Hallvard Furuseth. */
|
|
|
1185 REGISTER Lisp_Object expander, sym, def, tem;
|
|
|
1186
|
|
|
1187 while (1)
|
|
|
1188 {
|
|
|
1189 /* Come back here each time we expand a macro call,
|
|
|
1190 in case it expands into another macro call. */
|
|
|
1191 if (!CONSP (form))
|
|
|
1192 break;
|
|
|
1193 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
|
|
|
1194 def = sym = XCAR (form);
|
|
|
1195 tem = Qnil;
|
|
|
1196 /* Trace symbols aliases to other symbols
|
|
|
1197 until we get a symbol that is not an alias. */
|
|
|
1198 while (SYMBOLP (def))
|
|
|
1199 {
|
|
|
1200 QUIT;
|
|
|
1201 sym = def;
|
|
371
|
1202 tem = Fassq (sym, env);
|
|
0
|
1203 if (NILP (tem))
|
|
|
1204 {
|
|
|
1205 def = XSYMBOL (sym)->function;
|
|
|
1206 if (!UNBOUNDP (def))
|
|
|
1207 continue;
|
|
|
1208 }
|
|
|
1209 break;
|
|
|
1210 }
|
|
371
|
1211 /* Right now TEM is the result from SYM in ENV,
|
|
0
|
1212 and if TEM is nil then DEF is SYM's function definition. */
|
|
|
1213 if (NILP (tem))
|
|
|
1214 {
|
|
371
|
1215 /* SYM is not mentioned in ENV.
|
|
0
|
1216 Look at its function definition. */
|
|
|
1217 if (UNBOUNDP (def)
|
|
|
1218 || !CONSP (def))
|
|
|
1219 /* Not defined or definition not suitable */
|
|
|
1220 break;
|
|
|
1221 if (EQ (XCAR (def), Qautoload))
|
|
|
1222 {
|
|
|
1223 /* Autoloading function: will it be a macro when loaded? */
|
|
|
1224 tem = Felt (def, make_int (4));
|
|
|
1225 if (EQ (tem, Qt) || EQ (tem, Qmacro))
|
|
|
1226 {
|
|
|
1227 /* Yes, load it and try again. */
|
|
|
1228 do_autoload (def, sym);
|
|
|
1229 continue;
|
|
|
1230 }
|
|
|
1231 else
|
|
|
1232 break;
|
|
|
1233 }
|
|
|
1234 else if (!EQ (XCAR (def), Qmacro))
|
|
|
1235 break;
|
|
|
1236 else expander = XCDR (def);
|
|
|
1237 }
|
|
|
1238 else
|
|
|
1239 {
|
|
|
1240 expander = XCDR (tem);
|
|
|
1241 if (NILP (expander))
|
|
|
1242 break;
|
|
|
1243 }
|
|
|
1244 form = apply1 (expander, XCDR (form));
|
|
|
1245 }
|
|
|
1246 return form;
|
|
|
1247 }
|
|
|
1248
|
|
|
1249
|
|
380
|
1250 /************************************************************************/
|
|
|
1251 /* Non-local exits */
|
|
|
1252 /************************************************************************/
|
|
0
|
1253
|
|
20
|
1254 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /*
|
|
272
|
1255 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.
|
|
0
|
1256 TAG is evalled to get the tag to use. Then the BODY is executed.
|
|
|
1257 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
|
|
|
1258 If no throw happens, `catch' returns the value of the last BODY form.
|
|
|
1259 If a throw happens, it specifies the value to return from `catch'.
|
|
20
|
1260 */
|
|
|
1261 (args))
|
|
0
|
1262 {
|
|
|
1263 /* This function can GC */
|
|
380
|
1264 Lisp_Object tag = Feval (XCAR (args));
|
|
|
1265 Lisp_Object body = XCDR (args);
|
|
|
1266 return internal_catch (tag, Fprogn, body, 0);
|
|
0
|
1267 }
|
|
|
1268
|
|
|
1269 /* Set up a catch, then call C function FUNC on argument ARG.
|
|
|
1270 FUNC should return a Lisp_Object.
|
|
|
1271 This is how catches are done from within C code. */
|
|
|
1272
|
|
|
1273 Lisp_Object
|
|
185
|
1274 internal_catch (Lisp_Object tag,
|
|
0
|
1275 Lisp_Object (*func) (Lisp_Object arg),
|
|
|
1276 Lisp_Object arg,
|
|
272
|
1277 int * volatile threw)
|
|
0
|
1278 {
|
|
|
1279 /* This structure is made part of the chain `catchlist'. */
|
|
|
1280 struct catchtag c;
|
|
|
1281
|
|
|
1282 /* Fill in the components of c, and put it on the list. */
|
|
|
1283 c.next = catchlist;
|
|
|
1284 c.tag = tag;
|
|
|
1285 c.val = Qnil;
|
|
|
1286 c.backlist = backtrace_list;
|
|
|
1287 #if 0 /* FSFmacs */
|
|
|
1288 /* #### */
|
|
|
1289 c.handlerlist = handlerlist;
|
|
|
1290 #endif
|
|
|
1291 c.lisp_eval_depth = lisp_eval_depth;
|
|
380
|
1292 c.pdlcount = specpdl_depth();
|
|
0
|
1293 #if 0 /* FSFmacs */
|
|
|
1294 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1295 #endif
|
|
|
1296 c.gcpro = gcprolist;
|
|
|
1297 catchlist = &c;
|
|
|
1298
|
|
|
1299 /* Call FUNC. */
|
|
|
1300 if (SETJMP (c.jmp))
|
|
|
1301 {
|
|
|
1302 /* Throw works by a longjmp that comes right here. */
|
|
|
1303 if (threw) *threw = 1;
|
|
173
|
1304 return c.val;
|
|
0
|
1305 }
|
|
|
1306 c.val = (*func) (arg);
|
|
|
1307 if (threw) *threw = 0;
|
|
|
1308 catchlist = c.next;
|
|
404
|
1309 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1310 check_error_state_sanity ();
|
|
|
1311 #endif
|
|
173
|
1312 return c.val;
|
|
0
|
1313 }
|
|
|
1314
|
|
|
1315
|
|
|
1316 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
|
|
|
1317 jump to that CATCH, returning VALUE as the value of that catch.
|
|
|
1318
|
|
|
1319 This is the guts Fthrow and Fsignal; they differ only in the way
|
|
|
1320 they choose the catch tag to throw to. A catch tag for a
|
|
|
1321 condition-case form has a TAG of Qnil.
|
|
|
1322
|
|
|
1323 Before each catch is discarded, unbind all special bindings and
|
|
|
1324 execute all unwind-protect clauses made above that catch. Unwind
|
|
|
1325 the handler stack as we go, so that the proper handlers are in
|
|
|
1326 effect for each unwind-protect clause we run. At the end, restore
|
|
|
1327 some static info saved in CATCH, and longjmp to the location
|
|
|
1328 specified in the
|
|
|
1329
|
|
|
1330 This is used for correct unwinding in Fthrow and Fsignal. */
|
|
|
1331
|
|
|
1332 static void
|
|
|
1333 unwind_to_catch (struct catchtag *c, Lisp_Object val)
|
|
|
1334 {
|
|
|
1335 #if 0 /* FSFmacs */
|
|
|
1336 /* #### */
|
|
203
|
1337 REGISTER int last_time;
|
|
0
|
1338 #endif
|
|
|
1339
|
|
|
1340 /* Unwind the specbind, catch, and handler stacks back to CATCH
|
|
|
1341 Before each catch is discarded, unbind all special bindings
|
|
|
1342 and execute all unwind-protect clauses made above that catch.
|
|
|
1343 At the end, restore some static info saved in CATCH,
|
|
|
1344 and longjmp to the location specified.
|
|
|
1345 */
|
|
|
1346
|
|
|
1347 /* Save the value somewhere it will be GC'ed.
|
|
185
|
1348 (Can't overwrite tag slot because an unwind-protect may
|
|
0
|
1349 want to throw to this same tag, which isn't yet invalid.) */
|
|
|
1350 c->val = val;
|
|
|
1351
|
|
|
1352 #if 0 /* FSFmacs */
|
|
|
1353 /* Restore the polling-suppression count. */
|
|
|
1354 set_poll_suppress_count (catch->poll_suppress_count);
|
|
|
1355 #endif
|
|
|
1356
|
|
|
1357 #if 0 /* FSFmacs */
|
|
|
1358 /* #### FSFmacs has the following loop. Is it more correct? */
|
|
|
1359 do
|
|
|
1360 {
|
|
|
1361 last_time = catchlist == c;
|
|
|
1362
|
|
|
1363 /* Unwind the specpdl stack, and then restore the proper set of
|
|
|
1364 handlers. */
|
|
|
1365 unbind_to (catchlist->pdlcount, Qnil);
|
|
|
1366 handlerlist = catchlist->handlerlist;
|
|
|
1367 catchlist = catchlist->next;
|
|
404
|
1368 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1369 check_error_state_sanity ();
|
|
|
1370 #endif
|
|
0
|
1371 }
|
|
|
1372 while (! last_time);
|
|
|
1373 #else /* Actual XEmacs code */
|
|
|
1374 /* Unwind the specpdl stack */
|
|
|
1375 unbind_to (c->pdlcount, Qnil);
|
|
|
1376 catchlist = c->next;
|
|
404
|
1377 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1378 check_error_state_sanity ();
|
|
|
1379 #endif
|
|
0
|
1380 #endif
|
|
|
1381
|
|
|
1382 gcprolist = c->gcpro;
|
|
|
1383 backtrace_list = c->backlist;
|
|
|
1384 lisp_eval_depth = c->lisp_eval_depth;
|
|
|
1385
|
|
404
|
1386 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
0
|
1387 throw_level = 0;
|
|
380
|
1388 #endif
|
|
0
|
1389 LONGJMP (c->jmp, 1);
|
|
185
|
1390 }
|
|
0
|
1391
|
|
|
1392 static DOESNT_RETURN
|
|
|
1393 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p,
|
|
|
1394 Lisp_Object sig, Lisp_Object data)
|
|
|
1395 {
|
|
404
|
1396 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
0
|
1397 /* die if we recurse more than is reasonable */
|
|
|
1398 if (++throw_level > 20)
|
|
|
1399 abort();
|
|
211
|
1400 #endif
|
|
0
|
1401
|
|
|
1402 /* If bomb_out_p is t, this is being called from Fsignal as a
|
|
|
1403 "last resort" when there is no handler for this error and
|
|
|
1404 the debugger couldn't be invoked, so we are throwing to
|
|
|
1405 'top-level. If this tag doesn't exist (happens during the
|
|
|
1406 initialization stages) we would get in an infinite recursive
|
|
|
1407 Fsignal/Fthrow loop, so instead we bomb out to the
|
|
|
1408 really-early-error-handler.
|
|
|
1409
|
|
|
1410 Note that in fact the only time that the "last resort"
|
|
|
1411 occurs is when there's no catch for 'top-level -- the
|
|
|
1412 'top-level catch and the catch-all error handler are
|
|
|
1413 established at the same time, in initial_command_loop/
|
|
|
1414 top_level_1.
|
|
|
1415
|
|
185
|
1416 #### Fix this horrifitude!
|
|
0
|
1417 */
|
|
185
|
1418
|
|
0
|
1419 while (1)
|
|
|
1420 {
|
|
|
1421 REGISTER struct catchtag *c;
|
|
|
1422
|
|
|
1423 #if 0 /* FSFmacs */
|
|
|
1424 if (!NILP (tag)) /* #### */
|
|
|
1425 #endif
|
|
|
1426 for (c = catchlist; c; c = c->next)
|
|
|
1427 {
|
|
|
1428 if (EQ (c->tag, tag))
|
|
|
1429 unwind_to_catch (c, val);
|
|
|
1430 }
|
|
|
1431 if (!bomb_out_p)
|
|
|
1432 tag = Fsignal (Qno_catch, list2 (tag, val));
|
|
|
1433 else
|
|
|
1434 call1 (Qreally_early_error_handler, Fcons (sig, data));
|
|
|
1435 }
|
|
|
1436
|
|
|
1437 /* can't happen. who cares? - (Sun's compiler does) */
|
|
|
1438 /* throw_level--; */
|
|
|
1439 /* getting tired of compilation warnings */
|
|
|
1440 /* return Qnil; */
|
|
|
1441 }
|
|
|
1442
|
|
|
1443 /* See above, where CATCHLIST is defined, for a description of how
|
|
|
1444 Fthrow() works.
|
|
|
1445
|
|
|
1446 Fthrow() is also called by Fsignal(), to do a non-local jump
|
|
|
1447 back to the appropriate condition-case handler after (maybe)
|
|
|
1448 the debugger is entered. In that case, TAG is the value
|
|
|
1449 of Vcondition_handlers that was in place just after the
|
|
|
1450 condition-case handler was set up. The car of this will be
|
|
|
1451 some data referring to the handler: Its car will be Qunbound
|
|
|
1452 (thus, this tag can never be generated by Lisp code), and
|
|
|
1453 its CDR will be the HANDLERS argument to condition_case_1()
|
|
|
1454 (either Qerror, Qt, or a list of handlers as in `condition-case').
|
|
|
1455 This works fine because Fthrow() does not care what TAG was
|
|
|
1456 passed to it: it just looks up the catch list for something
|
|
|
1457 that is EQ() to TAG. When it finds it, it will longjmp()
|
|
|
1458 back to the place that established the catch (in this case,
|
|
|
1459 condition_case_1). See below for more info.
|
|
|
1460 */
|
|
|
1461
|
|
20
|
1462 DEFUN ("throw", Fthrow, 2, 2, 0, /*
|
|
272
|
1463 \(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.
|
|
0
|
1464 Both TAG and VALUE are evalled.
|
|
20
|
1465 */
|
|
|
1466 (tag, val))
|
|
0
|
1467 {
|
|
|
1468 throw_or_bomb_out (tag, val, 0, Qnil, Qnil); /* Doesn't return */
|
|
|
1469 return Qnil;
|
|
|
1470 }
|
|
|
1471
|
|
20
|
1472 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /*
|
|
0
|
1473 Do BODYFORM, protecting with UNWINDFORMS.
|
|
|
1474 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).
|
|
|
1475 If BODYFORM completes normally, its value is returned
|
|
|
1476 after executing the UNWINDFORMS.
|
|
|
1477 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
|
|
20
|
1478 */
|
|
|
1479 (args))
|
|
0
|
1480 {
|
|
|
1481 /* This function can GC */
|
|
380
|
1482 int speccount = specpdl_depth();
|
|
0
|
1483
|
|
272
|
1484 record_unwind_protect (Fprogn, XCDR (args));
|
|
380
|
1485 return unbind_to (speccount, Feval (XCAR (args)));
|
|
0
|
1486 }
|
|
|
1487
|
|
|
1488
|
|
380
|
1489 /************************************************************************/
|
|
|
1490 /* Signalling and trapping errors */
|
|
|
1491 /************************************************************************/
|
|
0
|
1492
|
|
|
1493 static Lisp_Object
|
|
|
1494 condition_bind_unwind (Lisp_Object loser)
|
|
|
1495 {
|
|
398
|
1496 Lisp_Cons *victim;
|
|
0
|
1497 /* ((handler-fun . handler-args) ... other handlers) */
|
|
|
1498 Lisp_Object tem = XCAR (loser);
|
|
|
1499
|
|
|
1500 while (CONSP (tem))
|
|
|
1501 {
|
|
|
1502 victim = XCONS (tem);
|
|
|
1503 tem = victim->cdr;
|
|
|
1504 free_cons (victim);
|
|
|
1505 }
|
|
|
1506 victim = XCONS (loser);
|
|
|
1507
|
|
|
1508 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1509 Vcondition_handlers = victim->cdr;
|
|
|
1510
|
|
|
1511 free_cons (victim);
|
|
173
|
1512 return Qnil;
|
|
0
|
1513 }
|
|
|
1514
|
|
|
1515 static Lisp_Object
|
|
|
1516 condition_case_unwind (Lisp_Object loser)
|
|
|
1517 {
|
|
398
|
1518 Lisp_Cons *victim;
|
|
0
|
1519
|
|
|
1520 /* ((<unbound> . clauses) ... other handlers */
|
|
|
1521 victim = XCONS (XCAR (loser));
|
|
|
1522 free_cons (victim);
|
|
|
1523
|
|
|
1524 victim = XCONS (loser);
|
|
|
1525 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */
|
|
|
1526 Vcondition_handlers = victim->cdr;
|
|
|
1527
|
|
|
1528 free_cons (victim);
|
|
173
|
1529 return Qnil;
|
|
0
|
1530 }
|
|
|
1531
|
|
|
1532 /* Split out from condition_case_3 so that primitive C callers
|
|
|
1533 don't have to cons up a lisp handler form to be evaluated. */
|
|
|
1534
|
|
|
1535 /* Call a function BFUN of one argument BARG, trapping errors as
|
|
|
1536 specified by HANDLERS. If no error occurs that is indicated by
|
|
|
1537 HANDLERS as something to be caught, the return value of this
|
|
|
1538 function is the return value from BFUN. If such an error does
|
|
|
1539 occur, HFUN is called, and its return value becomes the
|
|
|
1540 return value of condition_case_1(). The second argument passed
|
|
|
1541 to HFUN will always be HARG. The first argument depends on
|
|
|
1542 HANDLERS:
|
|
|
1543
|
|
|
1544 If HANDLERS is Qt, all errors (this includes QUIT, but not
|
|
|
1545 non-local exits with `throw') cause HFUN to be invoked, and VAL
|
|
|
1546 (the first argument to HFUN) is a cons (SIG . DATA) of the
|
|
|
1547 arguments passed to `signal'. The debugger is not invoked even if
|
|
|
1548 `debug-on-error' was set.
|
|
|
1549
|
|
|
1550 A HANDLERS value of Qerror is the same as Qt except that the
|
|
|
1551 debugger is invoked if `debug-on-error' was set.
|
|
|
1552
|
|
|
1553 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...)
|
|
|
1554 exactly as in `condition-case', and errors will be trapped
|
|
|
1555 as indicated in HANDLERS. VAL (the first argument to HFUN) will
|
|
|
1556 be a cons whose car is the cons (SIG . DATA) and whose CDR is the
|
|
|
1557 list (BODY ...) from the appropriate slot in HANDLERS.
|
|
|
1558
|
|
|
1559 This function pushes HANDLERS onto the front of Vcondition_handlers
|
|
|
1560 (actually with a Qunbound marker as well -- see Fthrow() above
|
|
|
1561 for why), establishes a catch whose tag is this new value of
|
|
|
1562 Vcondition_handlers, and calls BFUN. When Fsignal() is called,
|
|
|
1563 it calls Fthrow(), setting TAG to this same new value of
|
|
|
1564 Vcondition_handlers and setting VAL to the same thing that will
|
|
|
1565 be passed to HFUN, as above. Fthrow() longjmp()s back to the
|
|
|
1566 jump point we just established, and we in turn just call the
|
|
|
1567 HFUN and return its value.
|
|
|
1568
|
|
|
1569 For a real condition-case, HFUN will always be
|
|
|
1570 run_condition_case_handlers() and HARG is the argument VAR
|
|
|
1571 to condition-case. That function just binds VAR to the cons
|
|
|
1572 (SIG . DATA) that is the CAR of VAL, and calls the handler
|
|
|
1573 (BODY ...) that is the CDR of VAL. Note that before calling
|
|
|
1574 Fthrow(), Fsignal() restored Vcondition_handlers to the value
|
|
|
1575 it had *before* condition_case_1() was called. This maintains
|
|
|
1576 consistency (so that the state of things at exit of
|
|
|
1577 condition_case_1() is the same as at entry), and implies
|
|
|
1578 that the handler can signal the same error again (possibly
|
|
|
1579 after processing of its own), without getting in an infinite
|
|
|
1580 loop. */
|
|
|
1581
|
|
|
1582 Lisp_Object
|
|
|
1583 condition_case_1 (Lisp_Object handlers,
|
|
|
1584 Lisp_Object (*bfun) (Lisp_Object barg),
|
|
|
1585 Lisp_Object barg,
|
|
|
1586 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg),
|
|
|
1587 Lisp_Object harg)
|
|
|
1588 {
|
|
380
|
1589 int speccount = specpdl_depth();
|
|
0
|
1590 struct catchtag c;
|
|
|
1591 struct gcpro gcpro1;
|
|
|
1592
|
|
|
1593 #if 0 /* FSFmacs */
|
|
|
1594 c.tag = Qnil;
|
|
|
1595 #else
|
|
|
1596 /* Do consing now so out-of-memory error happens up front */
|
|
|
1597 /* (unbound . stuff) is a special condition-case kludge marker
|
|
|
1598 which is known specially by Fsignal.
|
|
|
1599 This is an abomination, but to fix it would require either
|
|
|
1600 making condition_case cons (a union of the conditions of the clauses)
|
|
|
1601 or changing the byte-compiler output (no thanks). */
|
|
|
1602 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers),
|
|
|
1603 Vcondition_handlers);
|
|
|
1604 #endif
|
|
|
1605 c.val = Qnil;
|
|
|
1606 c.backlist = backtrace_list;
|
|
|
1607 #if 0 /* FSFmacs */
|
|
|
1608 /* #### */
|
|
|
1609 c.handlerlist = handlerlist;
|
|
|
1610 #endif
|
|
|
1611 c.lisp_eval_depth = lisp_eval_depth;
|
|
380
|
1612 c.pdlcount = specpdl_depth();
|
|
0
|
1613 #if 0 /* FSFmacs */
|
|
|
1614 c.poll_suppress_count = async_timer_suppress_count;
|
|
|
1615 #endif
|
|
|
1616 c.gcpro = gcprolist;
|
|
|
1617 /* #### FSFmacs does the following statement *after* the setjmp(). */
|
|
|
1618 c.next = catchlist;
|
|
|
1619
|
|
|
1620 if (SETJMP (c.jmp))
|
|
|
1621 {
|
|
|
1622 /* throw does ungcpro, etc */
|
|
173
|
1623 return (*hfun) (c.val, harg);
|
|
0
|
1624 }
|
|
|
1625
|
|
|
1626 record_unwind_protect (condition_case_unwind, c.tag);
|
|
|
1627
|
|
|
1628 catchlist = &c;
|
|
|
1629 #if 0 /* FSFmacs */
|
|
|
1630 h.handler = handlers;
|
|
|
1631 h.var = Qnil;
|
|
|
1632 h.next = handlerlist;
|
|
|
1633 h.tag = &c;
|
|
|
1634 handlerlist = &h;
|
|
|
1635 #else
|
|
|
1636 Vcondition_handlers = c.tag;
|
|
|
1637 #endif
|
|
|
1638 GCPRO1 (harg); /* Somebody has to gc-protect */
|
|
|
1639
|
|
|
1640 c.val = ((*bfun) (barg));
|
|
|
1641
|
|
|
1642 /* The following is *not* true: (ben)
|
|
|
1643
|
|
|
1644 ungcpro, restoring catchlist and condition_handlers are actually
|
|
|
1645 redundant since unbind_to now restores them. But it looks funny not to
|
|
|
1646 have this code here, and it doesn't cost anything, so I'm leaving it.*/
|
|
|
1647 UNGCPRO;
|
|
|
1648 catchlist = c.next;
|
|
404
|
1649 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
1650 check_error_state_sanity ();
|
|
|
1651 #endif
|
|
0
|
1652 Vcondition_handlers = XCDR (c.tag);
|
|
|
1653
|
|
173
|
1654 return unbind_to (speccount, c.val);
|
|
0
|
1655 }
|
|
|
1656
|
|
|
1657 static Lisp_Object
|
|
|
1658 run_condition_case_handlers (Lisp_Object val, Lisp_Object var)
|
|
|
1659 {
|
|
|
1660 /* This function can GC */
|
|
|
1661 #if 0 /* FSFmacs */
|
|
|
1662 if (!NILP (h.var))
|
|
|
1663 specbind (h.var, c.val);
|
|
|
1664 val = Fprogn (Fcdr (h.chosen_clause));
|
|
185
|
1665
|
|
0
|
1666 /* Note that this just undoes the binding of h.var; whoever
|
|
380
|
1667 longjmp()ed to us unwound the stack to c.pdlcount before
|
|
0
|
1668 throwing. */
|
|
|
1669 unbind_to (c.pdlcount, Qnil);
|
|
|
1670 return val;
|
|
|
1671 #else
|
|
|
1672 int speccount;
|
|
|
1673
|
|
380
|
1674 CHECK_TRUE_LIST (val);
|
|
0
|
1675 if (NILP (var))
|
|
380
|
1676 return Fprogn (Fcdr (val)); /* tail call */
|
|
|
1677
|
|
|
1678 speccount = specpdl_depth();
|
|
0
|
1679 specbind (var, Fcar (val));
|
|
|
1680 val = Fprogn (Fcdr (val));
|
|
|
1681 return unbind_to (speccount, val);
|
|
|
1682 #endif
|
|
|
1683 }
|
|
|
1684
|
|
|
1685 /* Here for bytecode to call non-consfully. This is exactly like
|
|
|
1686 condition-case except that it takes three arguments rather
|
|
|
1687 than a single list of arguments. */
|
|
|
1688 Lisp_Object
|
|
272
|
1689 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers)
|
|
0
|
1690 {
|
|
|
1691 /* This function can GC */
|
|
380
|
1692 Lisp_Object handler;
|
|
|
1693
|
|
|
1694 EXTERNAL_LIST_LOOP_2 (handler, handlers)
|
|
|
1695 {
|
|
|
1696 if (NILP (handler))
|
|
|
1697 ;
|
|
|
1698 else if (CONSP (handler))
|
|
|
1699 {
|
|
|
1700 Lisp_Object conditions = XCAR (handler);
|
|
|
1701 /* CONDITIONS must a condition name or a list of condition names */
|
|
|
1702 if (SYMBOLP (conditions))
|
|
|
1703 ;
|
|
|
1704 else
|
|
|
1705 {
|
|
|
1706 Lisp_Object condition;
|
|
|
1707 EXTERNAL_LIST_LOOP_2 (condition, conditions)
|
|
|
1708 if (!SYMBOLP (condition))
|
|
|
1709 goto invalid_condition_handler;
|
|
|
1710 }
|
|
|
1711 }
|
|
|
1712 else
|
|
|
1713 {
|
|
|
1714 invalid_condition_handler:
|
|
|
1715 signal_simple_error ("Invalid condition handler", handler);
|
|
|
1716 }
|
|
|
1717 }
|
|
0
|
1718
|
|
|
1719 CHECK_SYMBOL (var);
|
|
|
1720
|
|
185
|
1721 return condition_case_1 (handlers,
|
|
380
|
1722 Feval, bodyform,
|
|
|
1723 run_condition_case_handlers,
|
|
|
1724 var);
|
|
0
|
1725 }
|
|
|
1726
|
|
20
|
1727 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /*
|
|
0
|
1728 Regain control when an error is signalled.
|
|
|
1729 Usage looks like (condition-case VAR BODYFORM HANDLERS...).
|
|
380
|
1730 Executes BODYFORM and returns its value if no error happens.
|
|
0
|
1731 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
|
|
|
1732 where the BODY is made of Lisp expressions.
|
|
|
1733
|
|
|
1734 A handler is applicable to an error if CONDITION-NAME is one of the
|
|
|
1735 error's condition names. If an error happens, the first applicable
|
|
|
1736 handler is run. As a special case, a CONDITION-NAME of t matches
|
|
|
1737 all errors, even those without the `error' condition name on them
|
|
272
|
1738 \(e.g. `quit').
|
|
0
|
1739
|
|
|
1740 The car of a handler may be a list of condition names
|
|
|
1741 instead of a single condition name.
|
|
|
1742
|
|
|
1743 When a handler handles an error,
|
|
|
1744 control returns to the condition-case and the handler BODY... is executed
|
|
|
1745 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
|
|
|
1746 VAR may be nil; then you do not get access to the signal information.
|
|
|
1747
|
|
|
1748 The value of the last BODY form is returned from the condition-case.
|
|
|
1749 See also the function `signal' for more info.
|
|
|
1750
|
|
|
1751 Note that at the time the condition handler is invoked, the Lisp stack
|
|
|
1752 and the current catches, condition-cases, and bindings have all been
|
|
|
1753 popped back to the state they were in just before the call to
|
|
|
1754 `condition-case'. This means that resignalling the error from
|
|
|
1755 within the handler will not result in an infinite loop.
|
|
|
1756
|
|
|
1757 If you want to establish an error handler that is called with the
|
|
|
1758 Lisp stack, bindings, etc. as they were when `signal' was called,
|
|
|
1759 rather than when the handler was set, use `call-with-condition-handler'.
|
|
20
|
1760 */
|
|
70
|
1761 (args))
|
|
0
|
1762 {
|
|
|
1763 /* This function can GC */
|
|
380
|
1764 Lisp_Object var = XCAR (args);
|
|
|
1765 Lisp_Object bodyform = XCAR (XCDR (args));
|
|
|
1766 Lisp_Object handlers = XCDR (XCDR (args));
|
|
|
1767 return condition_case_3 (bodyform, var, handlers);
|
|
185
|
1768 }
|
|
0
|
1769
|
|
20
|
1770 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /*
|
|
0
|
1771 Regain control when an error is signalled, without popping the stack.
|
|
|
1772 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS).
|
|
|
1773 This function is similar to `condition-case', but the handler is invoked
|
|
|
1774 with the same environment (Lisp stack, bindings, catches, condition-cases)
|
|
|
1775 that was current when `signal' was called, rather than when the handler
|
|
|
1776 was established.
|
|
|
1777
|
|
|
1778 HANDLER should be a function of one argument, which is a cons of the args
|
|
272
|
1779 \(SIG . DATA) that were passed to `signal'. It is invoked whenever
|
|
0
|
1780 `signal' is called (this differs from `condition-case', which allows
|
|
|
1781 you to specify which errors are trapped). If the handler function
|
|
|
1782 returns, `signal' continues as if the handler were never invoked.
|
|
272
|
1783 \(It continues to look for handlers established earlier than this one,
|
|
0
|
1784 and invokes the standard error-handler if none is found.)
|
|
20
|
1785 */
|
|
272
|
1786 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */
|
|
0
|
1787 {
|
|
|
1788 /* This function can GC */
|
|
380
|
1789 int speccount = specpdl_depth();
|
|
0
|
1790 Lisp_Object tem;
|
|
|
1791
|
|
|
1792 /* #### If there were a way to check that args[0] were a function
|
|
|
1793 which accepted one arg, that should be done here ... */
|
|
|
1794
|
|
|
1795 /* (handler-fun . handler-args) */
|
|
380
|
1796 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers);
|
|
0
|
1797 record_unwind_protect (condition_bind_unwind, tem);
|
|
|
1798 Vcondition_handlers = tem;
|
|
|
1799
|
|
|
1800 /* Caller should have GC-protected args */
|
|
380
|
1801 return unbind_to (speccount, Ffuncall (nargs - 1, args + 1));
|
|
0
|
1802 }
|
|
|
1803
|
|
|
1804 static int
|
|
|
1805 condition_type_p (Lisp_Object type, Lisp_Object conditions)
|
|
|
1806 {
|
|
|
1807 if (EQ (type, Qt))
|
|
|
1808 /* (condition-case c # (t c)) catches -all- signals
|
|
|
1809 * Use with caution! */
|
|
173
|
1810 return 1;
|
|
380
|
1811
|
|
|
1812 if (SYMBOLP (type))
|
|
|
1813 return !NILP (Fmemq (type, conditions));
|
|
|
1814
|
|
|
1815 for (; CONSP (type); type = XCDR (type))
|
|
|
1816 if (!NILP (Fmemq (XCAR (type), conditions)))
|
|
|
1817 return 1;
|
|
|
1818
|
|
|
1819 return 0;
|
|
0
|
1820 }
|
|
|
1821
|
|
|
1822 static Lisp_Object
|
|
|
1823 return_from_signal (Lisp_Object value)
|
|
|
1824 {
|
|
251
|
1825 #if 1
|
|
0
|
1826 /* Most callers are not prepared to handle gc if this
|
|
|
1827 returns. So, since this feature is not very useful,
|
|
|
1828 take it out. */
|
|
|
1829 /* Have called debugger; return value to signaller */
|
|
173
|
1830 return value;
|
|
0
|
1831 #else /* But the reality is that that stinks, because: */
|
|
|
1832 /* GACK!!! Really want some way for debug-on-quit errors
|
|
|
1833 to be continuable!! */
|
|
|
1834 error ("Returning a value from an error is no longer supported");
|
|
|
1835 #endif
|
|
|
1836 }
|
|
|
1837
|
|
|
1838 extern int in_display;
|
|
|
1839
|
|
|
1840
|
|
380
|
1841 /************************************************************************/
|
|
|
1842 /* the workhorse error-signaling function */
|
|
|
1843 /************************************************************************/
|
|
0
|
1844
|
|
|
1845 /* #### This function has not been synched with FSF. It diverges
|
|
|
1846 significantly. */
|
|
|
1847
|
|
|
1848 static Lisp_Object
|
|
|
1849 signal_1 (Lisp_Object sig, Lisp_Object data)
|
|
|
1850 {
|
|
|
1851 /* This function can GC */
|
|
|
1852 struct gcpro gcpro1, gcpro2;
|
|
|
1853 Lisp_Object conditions;
|
|
|
1854 Lisp_Object handlers;
|
|
|
1855 /* signal_call_debugger() could get called more than once
|
|
|
1856 (once when a call-with-condition-handler is about to
|
|
|
1857 be dealt with, and another when a condition-case handler
|
|
|
1858 is about to be invoked). So make sure the debugger and/or
|
|
|
1859 stack trace aren't done more than once. */
|
|
|
1860 int stack_trace_displayed = 0;
|
|
|
1861 int debugger_entered = 0;
|
|
|
1862 GCPRO2 (conditions, handlers);
|
|
|
1863
|
|
|
1864 if (!initialized)
|
|
|
1865 {
|
|
|
1866 /* who knows how much has been initialized? Safest bet is
|
|
|
1867 just to bomb out immediately. */
|
|
404
|
1868 /* let's not use stderr_out() here, because that does a bunch of
|
|
|
1869 things that might not be safe yet. */
|
|
0
|
1870 fprintf (stderr, "Error before initialization is complete!\n");
|
|
|
1871 abort ();
|
|
|
1872 }
|
|
|
1873
|
|
|
1874 if (gc_in_progress || in_display)
|
|
|
1875 /* This is one of many reasons why you can't run lisp code from redisplay.
|
|
|
1876 There is no sensible way to handle errors there. */
|
|
|
1877 abort ();
|
|
|
1878
|
|
|
1879 conditions = Fget (sig, Qerror_conditions, Qnil);
|
|
|
1880
|
|
|
1881 for (handlers = Vcondition_handlers;
|
|
|
1882 CONSP (handlers);
|
|
|
1883 handlers = XCDR (handlers))
|
|
|
1884 {
|
|
|
1885 Lisp_Object handler_fun = XCAR (XCAR (handlers));
|
|
|
1886 Lisp_Object handler_data = XCDR (XCAR (handlers));
|
|
|
1887 Lisp_Object outer_handlers = XCDR (handlers);
|
|
|
1888
|
|
|
1889 if (!UNBOUNDP (handler_fun))
|
|
|
1890 {
|
|
|
1891 /* call-with-condition-handler */
|
|
|
1892 Lisp_Object tem;
|
|
|
1893 Lisp_Object all_handlers = Vcondition_handlers;
|
|
|
1894 struct gcpro ngcpro1;
|
|
|
1895 NGCPRO1 (all_handlers);
|
|
|
1896 Vcondition_handlers = outer_handlers;
|
|
|
1897
|
|
|
1898 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1899 outer_handlers, 1,
|
|
|
1900 &stack_trace_displayed,
|
|
|
1901 &debugger_entered);
|
|
|
1902 if (!UNBOUNDP (tem))
|
|
|
1903 RETURN_NUNGCPRO (return_from_signal (tem));
|
|
|
1904
|
|
|
1905 tem = Fcons (sig, data);
|
|
|
1906 if (NILP (handler_data))
|
|
|
1907 tem = call1 (handler_fun, tem);
|
|
|
1908 else
|
|
|
1909 {
|
|
|
1910 /* (This code won't be used (for now?).) */
|
|
|
1911 struct gcpro nngcpro1;
|
|
|
1912 Lisp_Object args[3];
|
|
|
1913 NNGCPRO1 (args[0]);
|
|
|
1914 nngcpro1.nvars = 3;
|
|
|
1915 args[0] = handler_fun;
|
|
|
1916 args[1] = tem;
|
|
|
1917 args[2] = handler_data;
|
|
|
1918 nngcpro1.var = args;
|
|
|
1919 tem = Fapply (3, args);
|
|
|
1920 NNUNGCPRO;
|
|
|
1921 }
|
|
|
1922 NUNGCPRO;
|
|
|
1923 #if 0
|
|
|
1924 if (!EQ (tem, Qsignal))
|
|
173
|
1925 return return_from_signal (tem);
|
|
0
|
1926 #endif
|
|
|
1927 /* If handler didn't throw, try another handler */
|
|
|
1928 Vcondition_handlers = all_handlers;
|
|
|
1929 }
|
|
|
1930
|
|
|
1931 /* It's a condition-case handler */
|
|
|
1932
|
|
185
|
1933 /* t is used by handlers for all conditions, set up by C code.
|
|
0
|
1934 * debugger is not called even if debug_on_error */
|
|
|
1935 else if (EQ (handler_data, Qt))
|
|
|
1936 {
|
|
|
1937 UNGCPRO;
|
|
173
|
1938 return Fthrow (handlers, Fcons (sig, data));
|
|
0
|
1939 }
|
|
|
1940 /* `error' is used similarly to the way `t' is used, but in
|
|
|
1941 addition it invokes the debugger if debug_on_error.
|
|
|
1942 This is normally used for the outer command-loop error
|
|
|
1943 handler. */
|
|
|
1944 else if (EQ (handler_data, Qerror))
|
|
|
1945 {
|
|
|
1946 Lisp_Object tem = signal_call_debugger (conditions, sig, data,
|
|
|
1947 outer_handlers, 0,
|
|
|
1948 &stack_trace_displayed,
|
|
|
1949 &debugger_entered);
|
|
|
1950
|
|
|
1951 UNGCPRO;
|
|
|
1952 if (!UNBOUNDP (tem))
|
|
173
|
1953 return return_from_signal (tem);
|
|
0
|
1954
|
|
|
1955 tem = Fcons (sig, data);
|
|
173
|
1956 return Fthrow (handlers, tem);
|
|
0
|
1957 }
|
|
|
1958 else
|
|
|
1959 {
|
|
|
1960 /* handler established by real (Lisp) condition-case */
|
|
|
1961 Lisp_Object h;
|
|
|
1962
|
|
|
1963 for (h = handler_data; CONSP (h); h = Fcdr (h))
|
|
|
1964 {
|
|
|
1965 Lisp_Object clause = Fcar (h);
|
|
|
1966 Lisp_Object tem = Fcar (clause);
|
|
|
1967
|
|
|
1968 if (condition_type_p (tem, conditions))
|
|
|
1969 {
|
|
|
1970 tem = signal_call_debugger (conditions, sig, data,
|
|
|
1971 outer_handlers, 1,
|
|
|
1972 &stack_trace_displayed,
|
|
|
1973 &debugger_entered);
|
|
|
1974 UNGCPRO;
|
|
|
1975 if (!UNBOUNDP (tem))
|
|
173
|
1976 return return_from_signal (tem);
|
|
0
|
1977
|
|
|
1978 /* Doesn't return */
|
|
|
1979 tem = Fcons (Fcons (sig, data), Fcdr (clause));
|
|
173
|
1980 return Fthrow (handlers, tem);
|
|
0
|
1981 }
|
|
|
1982 }
|
|
|
1983 }
|
|
|
1984 }
|
|
|
1985
|
|
|
1986 /* If no handler is present now, try to run the debugger,
|
|
|
1987 and if that fails, throw to top level.
|
|
|
1988
|
|
|
1989 #### The only time that no handler is present is during
|
|
|
1990 temacs or perhaps very early in XEmacs. In both cases,
|
|
|
1991 there is no 'top-level catch. (That's why the
|
|
|
1992 "bomb-out" hack was added.)
|
|
|
1993
|
|
185
|
1994 #### Fix this horrifitude!
|
|
0
|
1995 */
|
|
|
1996 signal_call_debugger (conditions, sig, data, Qnil, 0,
|
|
|
1997 &stack_trace_displayed,
|
|
|
1998 &debugger_entered);
|
|
|
1999 UNGCPRO;
|
|
|
2000 throw_or_bomb_out (Qtop_level, Qt, 1, sig, data); /* Doesn't return */
|
|
|
2001 return Qnil;
|
|
|
2002 }
|
|
|
2003
|
|
|
2004
|
|
|
2005 /****************** Error functions class 1 ******************/
|
|
|
2006
|
|
|
2007 /* Class 1: General functions that signal an error.
|
|
|
2008 These functions take an error type and a list of associated error
|
|
|
2009 data. */
|
|
|
2010
|
|
|
2011 /* The simplest external error function: it would be called
|
|
|
2012 signal_continuable_error() in the terminology below, but it's
|
|
|
2013 Lisp-callable. */
|
|
|
2014
|
|
20
|
2015 DEFUN ("signal", Fsignal, 2, 2, 0, /*
|
|
0
|
2016 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA.
|
|
|
2017 An error symbol is a symbol defined using `define-error'.
|
|
|
2018 DATA should be a list. Its elements are printed as part of the error message.
|
|
|
2019 If the signal is handled, DATA is made available to the handler.
|
|
|
2020 See also the function `signal-error', and the functions to handle errors:
|
|
|
2021 `condition-case' and `call-with-condition-handler'.
|
|
|
2022
|
|
|
2023 Note that this function can return, if the debugger is invoked and the
|
|
|
2024 user invokes the "return from signal" option.
|
|
20
|
2025 */
|
|
|
2026 (error_symbol, data))
|
|
0
|
2027 {
|
|
|
2028 /* Fsignal() is one of these functions that's called all the time
|
|
|
2029 with newly-created Lisp objects. We allow this; but we must GC-
|
|
|
2030 protect the objects because all sorts of weird stuff could
|
|
|
2031 happen. */
|
|
|
2032
|
|
|
2033 struct gcpro gcpro1;
|
|
|
2034
|
|
|
2035 GCPRO1 (data);
|
|
|
2036 if (!NILP (Vcurrent_error_state))
|
|
|
2037 {
|
|
|
2038 if (!NILP (Vcurrent_warning_class))
|
|
|
2039 warn_when_safe_lispobj (Vcurrent_warning_class, Qwarning,
|
|
|
2040 Fcons (error_symbol, data));
|
|
|
2041 Fthrow (Qunbound_suspended_errors_tag, Qnil);
|
|
|
2042 abort (); /* Better not get here! */
|
|
|
2043 }
|
|
|
2044 RETURN_UNGCPRO (signal_1 (error_symbol, data));
|
|
|
2045 }
|
|
|
2046
|
|
|
2047 /* Signal a non-continuable error. */
|
|
|
2048
|
|
|
2049 DOESNT_RETURN
|
|
|
2050 signal_error (Lisp_Object sig, Lisp_Object data)
|
|
|
2051 {
|
|
|
2052 for (;;)
|
|
|
2053 Fsignal (sig, data);
|
|
|
2054 }
|
|
404
|
2055 #ifdef ERROR_CHECK_TYPECHECK
|
|
|
2056 void
|
|
|
2057 check_error_state_sanity (void)
|
|
0
|
2058 {
|
|
404
|
2059 struct catchtag *c;
|
|
|
2060 int found_error_tag = 0;
|
|
|
2061
|
|
|
2062 for (c = catchlist; c; c = c->next)
|
|
|
2063 {
|
|
|
2064 if (EQ (c->tag, Qunbound_suspended_errors_tag))
|
|
|
2065 {
|
|
|
2066 found_error_tag = 1;
|
|
|
2067 break;
|
|
|
2068 }
|
|
|
2069 }
|
|
|
2070
|
|
|
2071 assert (found_error_tag || NILP (Vcurrent_error_state));
|
|
0
|
2072 }
|
|
404
|
2073 #endif
|
|
0
|
2074
|
|
|
2075 static Lisp_Object
|
|
|
2076 restore_current_warning_class (Lisp_Object warning_class)
|
|
|
2077 {
|
|
|
2078 Vcurrent_warning_class = warning_class;
|
|
|
2079 return Qnil;
|
|
|
2080 }
|
|
|
2081
|
|
|
2082 static Lisp_Object
|
|
|
2083 restore_current_error_state (Lisp_Object error_state)
|
|
|
2084 {
|
|
|
2085 Vcurrent_error_state = error_state;
|
|
|
2086 return Qnil;
|
|
|
2087 }
|
|
|
2088
|
|
404
|
2089 static Lisp_Object
|
|
|
2090 call_with_suspended_errors_1 (Lisp_Object opaque_arg)
|
|
|
2091 {
|
|
|
2092 Lisp_Object val;
|
|
|
2093 Lisp_Object *kludgy_args = (Lisp_Object *) get_opaque_ptr (opaque_arg);
|
|
|
2094 Lisp_Object no_error = kludgy_args[2];
|
|
|
2095 int speccount = specpdl_depth ();
|
|
|
2096
|
|
|
2097 if (!EQ (Vcurrent_error_state, no_error))
|
|
|
2098 {
|
|
|
2099 record_unwind_protect (restore_current_error_state,
|
|
|
2100 Vcurrent_error_state);
|
|
|
2101 Vcurrent_error_state = no_error;
|
|
|
2102 }
|
|
|
2103 PRIMITIVE_FUNCALL (val, get_opaque_ptr (kludgy_args[0]),
|
|
|
2104 kludgy_args + 3, XINT (kludgy_args[1]));
|
|
|
2105 return unbind_to (speccount, val);
|
|
|
2106 }
|
|
|
2107
|
|
0
|
2108 /* Many functions would like to do one of three things if an error
|
|
|
2109 occurs:
|
|
|
2110
|
|
|
2111 (1) signal the error, as usual.
|
|
|
2112 (2) silently fail and return some error value.
|
|
|
2113 (3) do as (2) but issue a warning in the process.
|
|
|
2114
|
|
|
2115 Currently there's lots of stuff that passes an Error_behavior
|
|
|
2116 value and calls maybe_signal_error() and other such functions.
|
|
|
2117 This approach is inherently error-prone and broken. A much
|
|
|
2118 more robust and easier approach is to use call_with_suspended_errors().
|
|
|
2119 Wrap this around any function in which you might want errors
|
|
|
2120 to not be errors.
|
|
|
2121 */
|
|
|
2122
|
|
|
2123 Lisp_Object
|
|
179
|
2124 call_with_suspended_errors (lisp_fn_t fun, volatile Lisp_Object retval,
|
|
0
|
2125 Lisp_Object class, Error_behavior errb,
|
|
|
2126 int nargs, ...)
|
|
|
2127 {
|
|
|
2128 va_list vargs;
|
|
|
2129 int speccount;
|
|
404
|
2130 Lisp_Object kludgy_args[23];
|
|
|
2131 Lisp_Object *args = kludgy_args + 3;
|
|
0
|
2132 int i;
|
|
|
2133 Lisp_Object no_error;
|
|
|
2134
|
|
|
2135 assert (SYMBOLP (class)); /* sanity-check */
|
|
|
2136 assert (!NILP (class));
|
|
|
2137 assert (nargs >= 0 && nargs < 20);
|
|
|
2138
|
|
|
2139 /* ERROR_ME means don't trap errors. (However, if errors are
|
|
|
2140 already trapped, we leave them trapped.)
|
|
|
2141
|
|
|
2142 Otherwise, we trap errors, and trap warnings if ERROR_ME_WARN.
|
|
|
2143
|
|
|
2144 If ERROR_ME_NOT, it causes no warnings even if warnings
|
|
|
2145 were previously enabled. However, we never change the
|
|
|
2146 warning class from one to another. */
|
|
|
2147 if (!ERRB_EQ (errb, ERROR_ME))
|
|
|
2148 {
|
|
|
2149 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */
|
|
|
2150 class = Qnil;
|
|
|
2151 errb = ERROR_ME_NOT;
|
|
|
2152 no_error = Qt;
|
|
|
2153 }
|
|
|
2154 else
|
|
|
2155 no_error = Qnil;
|
|
185
|
2156
|
|
0
|
2157 va_start (vargs, nargs);
|
|
|
2158 for (i = 0; i < nargs; i++)
|
|
|
2159 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
2160 va_end (vargs);
|
|
|
2161
|
|
|
2162 /* If error-checking is not disabled, just call the function.
|
|
|
2163 It's important not to override disabled error-checking with
|
|
|
2164 enabled error-checking. */
|
|
185
|
2165
|
|
0
|
2166 if (ERRB_EQ (errb, ERROR_ME))
|
|
380
|
2167 {
|
|
|
2168 Lisp_Object val;
|
|
|
2169 PRIMITIVE_FUNCALL (val, fun, args, nargs);
|
|
|
2170 return val;
|
|
|
2171 }
|
|
|
2172
|
|
404
|
2173 speccount = specpdl_depth ();
|
|
0
|
2174 if (NILP (class) || NILP (Vcurrent_warning_class))
|
|
|
2175 {
|
|
|
2176 /* If we're currently calling for no warnings, then make it so.
|
|
|
2177 If we're currently calling for warnings and we weren't
|
|
|
2178 previously, then set our warning class; otherwise, leave
|
|
|
2179 the existing one alone. */
|
|
|
2180 record_unwind_protect (restore_current_warning_class,
|
|
|
2181 Vcurrent_warning_class);
|
|
|
2182 Vcurrent_warning_class = class;
|
|
|
2183 }
|
|
|
2184
|
|
|
2185 {
|
|
|
2186 int threw;
|
|
|
2187 Lisp_Object the_retval;
|
|
|
2188 Lisp_Object opaque1 = make_opaque_ptr (kludgy_args);
|
|
|
2189 Lisp_Object opaque2 = make_opaque_ptr ((void *) fun);
|
|
|
2190 struct gcpro gcpro1, gcpro2;
|
|
|
2191
|
|
|
2192 GCPRO2 (opaque1, opaque2);
|
|
|
2193 kludgy_args[0] = opaque2;
|
|
|
2194 kludgy_args[1] = make_int (nargs);
|
|
404
|
2195 kludgy_args[2] = no_error;
|
|
0
|
2196 the_retval = internal_catch (Qunbound_suspended_errors_tag,
|
|
|
2197 call_with_suspended_errors_1,
|
|
|
2198 opaque1, &threw);
|
|
|
2199 free_opaque_ptr (opaque1);
|
|
|
2200 free_opaque_ptr (opaque2);
|
|
|
2201 UNGCPRO;
|
|
|
2202 /* Use the returned value except in non-local exit, when
|
|
|
2203 RETVAL applies. */
|
|
272
|
2204 /* Some perverse compilers require the perverse cast below. */
|
|
|
2205 return unbind_to (speccount,
|
|
|
2206 threw ? *((Lisp_Object*) &(retval)) : the_retval);
|
|
0
|
2207 }
|
|
|
2208 }
|
|
|
2209
|
|
|
2210 /* Signal a non-continuable error or display a warning or do nothing,
|
|
|
2211 according to ERRB. CLASS is the class of warning and should
|
|
|
2212 refer to what sort of operation is being done (e.g. Qtoolbar,
|
|
|
2213 Qresource, etc.). */
|
|
|
2214
|
|
|
2215 void
|
|
|
2216 maybe_signal_error (Lisp_Object sig, Lisp_Object data, Lisp_Object class,
|
|
|
2217 Error_behavior errb)
|
|
|
2218 {
|
|
|
2219 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2220 return;
|
|
|
2221 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2222 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2223 else
|
|
|
2224 for (;;)
|
|
|
2225 Fsignal (sig, data);
|
|
|
2226 }
|
|
|
2227
|
|
|
2228 /* Signal a continuable error or display a warning or do nothing,
|
|
|
2229 according to ERRB. */
|
|
|
2230
|
|
|
2231 Lisp_Object
|
|
|
2232 maybe_signal_continuable_error (Lisp_Object sig, Lisp_Object data,
|
|
|
2233 Lisp_Object class, Error_behavior errb)
|
|
|
2234 {
|
|
|
2235 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2236 return Qnil;
|
|
|
2237 else if (ERRB_EQ (errb, ERROR_ME_WARN))
|
|
|
2238 {
|
|
|
2239 warn_when_safe_lispobj (class, Qwarning, Fcons (sig, data));
|
|
|
2240 return Qnil;
|
|
|
2241 }
|
|
|
2242 else
|
|
|
2243 return Fsignal (sig, data);
|
|
|
2244 }
|
|
|
2245
|
|
|
2246
|
|
|
2247 /****************** Error functions class 2 ******************/
|
|
|
2248
|
|
|
2249 /* Class 2: Printf-like functions that signal an error.
|
|
|
2250 These functions signal an error of type Qerror, whose data
|
|
|
2251 is a single string, created using the arguments. */
|
|
|
2252
|
|
|
2253 /* dump an error message; called like printf */
|
|
|
2254
|
|
|
2255 DOESNT_RETURN
|
|
398
|
2256 error (const char *fmt, ...)
|
|
0
|
2257 {
|
|
|
2258 Lisp_Object obj;
|
|
|
2259 va_list args;
|
|
|
2260
|
|
|
2261 va_start (args, fmt);
|
|
398
|
2262 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2263 args);
|
|
|
2264 va_end (args);
|
|
|
2265
|
|
|
2266 /* Fsignal GC-protects its args */
|
|
|
2267 signal_error (Qerror, list1 (obj));
|
|
|
2268 }
|
|
|
2269
|
|
|
2270 void
|
|
398
|
2271 maybe_error (Lisp_Object class, Error_behavior errb, const char *fmt, ...)
|
|
0
|
2272 {
|
|
|
2273 Lisp_Object obj;
|
|
|
2274 va_list args;
|
|
|
2275
|
|
|
2276 /* Optimization: */
|
|
|
2277 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2278 return;
|
|
|
2279
|
|
|
2280 va_start (args, fmt);
|
|
398
|
2281 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2282 args);
|
|
|
2283 va_end (args);
|
|
|
2284
|
|
|
2285 /* Fsignal GC-protects its args */
|
|
|
2286 maybe_signal_error (Qerror, list1 (obj), class, errb);
|
|
|
2287 }
|
|
|
2288
|
|
|
2289 Lisp_Object
|
|
398
|
2290 continuable_error (const char *fmt, ...)
|
|
0
|
2291 {
|
|
|
2292 Lisp_Object obj;
|
|
|
2293 va_list args;
|
|
|
2294
|
|
|
2295 va_start (args, fmt);
|
|
398
|
2296 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2297 args);
|
|
|
2298 va_end (args);
|
|
|
2299
|
|
|
2300 /* Fsignal GC-protects its args */
|
|
|
2301 return Fsignal (Qerror, list1 (obj));
|
|
|
2302 }
|
|
|
2303
|
|
|
2304 Lisp_Object
|
|
|
2305 maybe_continuable_error (Lisp_Object class, Error_behavior errb,
|
|
398
|
2306 const char *fmt, ...)
|
|
0
|
2307 {
|
|
|
2308 Lisp_Object obj;
|
|
|
2309 va_list args;
|
|
|
2310
|
|
|
2311 /* Optimization: */
|
|
|
2312 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2313 return Qnil;
|
|
|
2314
|
|
|
2315 va_start (args, fmt);
|
|
398
|
2316 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2317 args);
|
|
|
2318 va_end (args);
|
|
|
2319
|
|
|
2320 /* Fsignal GC-protects its args */
|
|
|
2321 return maybe_signal_continuable_error (Qerror, list1 (obj), class, errb);
|
|
|
2322 }
|
|
|
2323
|
|
|
2324
|
|
|
2325 /****************** Error functions class 3 ******************/
|
|
|
2326
|
|
|
2327 /* Class 3: Signal an error with a string and an associated object.
|
|
|
2328 These functions signal an error of type Qerror, whose data
|
|
|
2329 is two objects, a string and a related Lisp object (usually the object
|
|
|
2330 where the error is occurring). */
|
|
|
2331
|
|
|
2332 DOESNT_RETURN
|
|
398
|
2333 signal_simple_error (const char *reason, Lisp_Object frob)
|
|
0
|
2334 {
|
|
|
2335 signal_error (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2336 }
|
|
|
2337
|
|
|
2338 void
|
|
398
|
2339 maybe_signal_simple_error (const char *reason, Lisp_Object frob,
|
|
0
|
2340 Lisp_Object class, Error_behavior errb)
|
|
|
2341 {
|
|
|
2342 /* Optimization: */
|
|
|
2343 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2344 return;
|
|
|
2345 maybe_signal_error (Qerror, list2 (build_translated_string (reason), frob),
|
|
|
2346 class, errb);
|
|
|
2347 }
|
|
|
2348
|
|
|
2349 Lisp_Object
|
|
398
|
2350 signal_simple_continuable_error (const char *reason, Lisp_Object frob)
|
|
0
|
2351 {
|
|
|
2352 return Fsignal (Qerror, list2 (build_translated_string (reason), frob));
|
|
|
2353 }
|
|
|
2354
|
|
|
2355 Lisp_Object
|
|
398
|
2356 maybe_signal_simple_continuable_error (const char *reason, Lisp_Object frob,
|
|
0
|
2357 Lisp_Object class, Error_behavior errb)
|
|
|
2358 {
|
|
|
2359 /* Optimization: */
|
|
|
2360 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2361 return Qnil;
|
|
|
2362 return maybe_signal_continuable_error
|
|
|
2363 (Qerror, list2 (build_translated_string (reason),
|
|
|
2364 frob), class, errb);
|
|
185
|
2365 }
|
|
0
|
2366
|
|
|
2367
|
|
|
2368 /****************** Error functions class 4 ******************/
|
|
|
2369
|
|
|
2370 /* Class 4: Printf-like functions that signal an error.
|
|
|
2371 These functions signal an error of type Qerror, whose data
|
|
|
2372 is a two objects, a string (created using the arguments) and a
|
|
|
2373 Lisp object.
|
|
|
2374 */
|
|
|
2375
|
|
|
2376 DOESNT_RETURN
|
|
398
|
2377 error_with_frob (Lisp_Object frob, const char *fmt, ...)
|
|
0
|
2378 {
|
|
|
2379 Lisp_Object obj;
|
|
|
2380 va_list args;
|
|
|
2381
|
|
|
2382 va_start (args, fmt);
|
|
398
|
2383 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2384 args);
|
|
|
2385 va_end (args);
|
|
|
2386
|
|
|
2387 /* Fsignal GC-protects its args */
|
|
|
2388 signal_error (Qerror, list2 (obj, frob));
|
|
|
2389 }
|
|
|
2390
|
|
|
2391 void
|
|
|
2392 maybe_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
398
|
2393 Error_behavior errb, const char *fmt, ...)
|
|
0
|
2394 {
|
|
|
2395 Lisp_Object obj;
|
|
|
2396 va_list args;
|
|
|
2397
|
|
|
2398 /* Optimization: */
|
|
|
2399 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2400 return;
|
|
|
2401
|
|
|
2402 va_start (args, fmt);
|
|
398
|
2403 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2404 args);
|
|
|
2405 va_end (args);
|
|
|
2406
|
|
|
2407 /* Fsignal GC-protects its args */
|
|
|
2408 maybe_signal_error (Qerror, list2 (obj, frob), class, errb);
|
|
|
2409 }
|
|
|
2410
|
|
|
2411 Lisp_Object
|
|
398
|
2412 continuable_error_with_frob (Lisp_Object frob, const char *fmt, ...)
|
|
0
|
2413 {
|
|
|
2414 Lisp_Object obj;
|
|
|
2415 va_list args;
|
|
|
2416
|
|
|
2417 va_start (args, fmt);
|
|
398
|
2418 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2419 args);
|
|
|
2420 va_end (args);
|
|
|
2421
|
|
|
2422 /* Fsignal GC-protects its args */
|
|
|
2423 return Fsignal (Qerror, list2 (obj, frob));
|
|
|
2424 }
|
|
|
2425
|
|
|
2426 Lisp_Object
|
|
|
2427 maybe_continuable_error_with_frob (Lisp_Object frob, Lisp_Object class,
|
|
398
|
2428 Error_behavior errb, const char *fmt, ...)
|
|
0
|
2429 {
|
|
|
2430 Lisp_Object obj;
|
|
|
2431 va_list args;
|
|
|
2432
|
|
|
2433 /* Optimization: */
|
|
|
2434 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2435 return Qnil;
|
|
|
2436
|
|
|
2437 va_start (args, fmt);
|
|
398
|
2438 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt), Qnil, -1,
|
|
0
|
2439 args);
|
|
|
2440 va_end (args);
|
|
|
2441
|
|
|
2442 /* Fsignal GC-protects its args */
|
|
|
2443 return maybe_signal_continuable_error (Qerror, list2 (obj, frob),
|
|
|
2444 class, errb);
|
|
|
2445 }
|
|
|
2446
|
|
|
2447
|
|
|
2448 /****************** Error functions class 5 ******************/
|
|
|
2449
|
|
|
2450 /* Class 5: Signal an error with a string and two associated objects.
|
|
|
2451 These functions signal an error of type Qerror, whose data
|
|
|
2452 is three objects, a string and two related Lisp objects. */
|
|
|
2453
|
|
|
2454 DOESNT_RETURN
|
|
398
|
2455 signal_simple_error_2 (const char *reason,
|
|
0
|
2456 Lisp_Object frob0, Lisp_Object frob1)
|
|
|
2457 {
|
|
|
2458 signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2459 frob1));
|
|
|
2460 }
|
|
|
2461
|
|
|
2462 void
|
|
398
|
2463 maybe_signal_simple_error_2 (const char *reason, Lisp_Object frob0,
|
|
0
|
2464 Lisp_Object frob1, Lisp_Object class,
|
|
|
2465 Error_behavior errb)
|
|
|
2466 {
|
|
|
2467 /* Optimization: */
|
|
|
2468 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2469 return;
|
|
|
2470 maybe_signal_error (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2471 frob1), class, errb);
|
|
|
2472 }
|
|
|
2473
|
|
|
2474
|
|
|
2475 Lisp_Object
|
|
398
|
2476 signal_simple_continuable_error_2 (const char *reason, Lisp_Object frob0,
|
|
0
|
2477 Lisp_Object frob1)
|
|
|
2478 {
|
|
|
2479 return Fsignal (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2480 frob1));
|
|
|
2481 }
|
|
|
2482
|
|
|
2483 Lisp_Object
|
|
398
|
2484 maybe_signal_simple_continuable_error_2 (const char *reason, Lisp_Object frob0,
|
|
0
|
2485 Lisp_Object frob1, Lisp_Object class,
|
|
|
2486 Error_behavior errb)
|
|
|
2487 {
|
|
|
2488 /* Optimization: */
|
|
|
2489 if (ERRB_EQ (errb, ERROR_ME_NOT))
|
|
|
2490 return Qnil;
|
|
|
2491 return maybe_signal_continuable_error
|
|
|
2492 (Qerror, list3 (build_translated_string (reason), frob0,
|
|
|
2493 frob1),
|
|
|
2494 class, errb);
|
|
|
2495 }
|
|
|
2496
|
|
|
2497
|
|
|
2498 /* This is what the QUIT macro calls to signal a quit */
|
|
|
2499 void
|
|
|
2500 signal_quit (void)
|
|
|
2501 {
|
|
|
2502 /* This function can GC */
|
|
|
2503 if (EQ (Vquit_flag, Qcritical))
|
|
|
2504 debug_on_quit |= 2; /* set critical bit. */
|
|
185
|
2505 Vquit_flag = Qnil;
|
|
0
|
2506 /* note that this is continuable. */
|
|
|
2507 Fsignal (Qquit, Qnil);
|
|
|
2508 }
|
|
|
2509
|
|
|
2510
|
|
380
|
2511 /* Used in core lisp functions for efficiency */
|
|
398
|
2512 Lisp_Object
|
|
380
|
2513 signal_void_function_error (Lisp_Object function)
|
|
|
2514 {
|
|
398
|
2515 return Fsignal (Qvoid_function, list1 (function));
|
|
380
|
2516 }
|
|
|
2517
|
|
398
|
2518 Lisp_Object
|
|
380
|
2519 signal_invalid_function_error (Lisp_Object function)
|
|
|
2520 {
|
|
398
|
2521 return Fsignal (Qinvalid_function, list1 (function));
|
|
380
|
2522 }
|
|
|
2523
|
|
398
|
2524 Lisp_Object
|
|
380
|
2525 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs)
|
|
|
2526 {
|
|
398
|
2527 return Fsignal (Qwrong_number_of_arguments,
|
|
|
2528 list2 (function, make_int (nargs)));
|
|
380
|
2529 }
|
|
|
2530
|
|
|
2531 /* Used in list traversal macros for efficiency. */
|
|
398
|
2532 DOESNT_RETURN
|
|
380
|
2533 signal_malformed_list_error (Lisp_Object list)
|
|
|
2534 {
|
|
398
|
2535 signal_error (Qmalformed_list, list1 (list));
|
|
380
|
2536 }
|
|
|
2537
|
|
398
|
2538 DOESNT_RETURN
|
|
380
|
2539 signal_malformed_property_list_error (Lisp_Object list)
|
|
|
2540 {
|
|
398
|
2541 signal_error (Qmalformed_property_list, list1 (list));
|
|
380
|
2542 }
|
|
|
2543
|
|
398
|
2544 DOESNT_RETURN
|
|
380
|
2545 signal_circular_list_error (Lisp_Object list)
|
|
|
2546 {
|
|
398
|
2547 signal_error (Qcircular_list, list1 (list));
|
|
380
|
2548 }
|
|
|
2549
|
|
398
|
2550 DOESNT_RETURN
|
|
380
|
2551 signal_circular_property_list_error (Lisp_Object list)
|
|
|
2552 {
|
|
398
|
2553 signal_error (Qcircular_property_list, list1 (list));
|
|
380
|
2554 }
|
|
|
2555
|
|
|
2556 /************************************************************************/
|
|
|
2557 /* User commands */
|
|
|
2558 /************************************************************************/
|
|
0
|
2559
|
|
20
|
2560 DEFUN ("commandp", Fcommandp, 1, 1, 0, /*
|
|
272
|
2561 Return t if FUNCTION makes provisions for interactive calling.
|
|
0
|
2562 This means it contains a description for how to read arguments to give it.
|
|
|
2563 The value is nil for an invalid function or a symbol with no function
|
|
|
2564 definition.
|
|
|
2565
|
|
|
2566 Interactively callable functions include
|
|
|
2567
|
|
|
2568 -- strings and vectors (treated as keyboard macros)
|
|
|
2569 -- lambda-expressions that contain a top-level call to `interactive'
|
|
|
2570 -- autoload definitions made by `autoload' with non-nil fourth argument
|
|
|
2571 (i.e. the interactive flag)
|
|
|
2572 -- compiled-function objects with a non-nil `compiled-function-interactive'
|
|
|
2573 value
|
|
|
2574 -- subrs (built-in functions) that are interactively callable
|
|
|
2575
|
|
|
2576 Also, a symbol satisfies `commandp' if its function definition does so.
|
|
20
|
2577 */
|
|
|
2578 (function))
|
|
0
|
2579 {
|
|
272
|
2580 Lisp_Object fun = indirect_function (function, 0);
|
|
|
2581
|
|
380
|
2582 if (COMPILED_FUNCTIONP (fun))
|
|
|
2583 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil;
|
|
|
2584
|
|
|
2585 /* Lists may represent commands. */
|
|
|
2586 if (CONSP (fun))
|
|
|
2587 {
|
|
|
2588 Lisp_Object funcar = XCAR (fun);
|
|
|
2589 if (EQ (funcar, Qlambda))
|
|
|
2590 return Fassq (Qinteractive, Fcdr (Fcdr (fun)));
|
|
|
2591 if (EQ (funcar, Qautoload))
|
|
|
2592 return Fcar (Fcdr (Fcdr (Fcdr (fun))));
|
|
|
2593 else
|
|
|
2594 return Qnil;
|
|
|
2595 }
|
|
0
|
2596
|
|
|
2597 /* Emacs primitives are interactive if their DEFUN specifies an
|
|
|
2598 interactive spec. */
|
|
|
2599 if (SUBRP (fun))
|
|
149
|
2600 return XSUBR (fun)->prompt ? Qt : Qnil;
|
|
|
2601
|
|
0
|
2602 /* Strings and vectors are keyboard macros. */
|
|
|
2603 if (VECTORP (fun) || STRINGP (fun))
|
|
|
2604 return Qt;
|
|
|
2605
|
|
380
|
2606 /* Everything else (including Qunbound) is not a command. */
|
|
|
2607 return Qnil;
|
|
0
|
2608 }
|
|
|
2609
|
|
20
|
2610 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /*
|
|
0
|
2611 Execute CMD as an editor command.
|
|
|
2612 CMD must be an object that satisfies the `commandp' predicate.
|
|
|
2613 Optional second arg RECORD-FLAG is as in `call-interactively'.
|
|
|
2614 The argument KEYS specifies the value to use instead of (this-command-keys)
|
|
|
2615 when reading the arguments.
|
|
20
|
2616 */
|
|
|
2617 (cmd, record, keys))
|
|
0
|
2618 {
|
|
|
2619 /* This function can GC */
|
|
|
2620 Lisp_Object prefixarg;
|
|
|
2621 Lisp_Object final = cmd;
|
|
|
2622 struct backtrace backtrace;
|
|
|
2623 struct console *con = XCONSOLE (Vselected_console);
|
|
|
2624
|
|
|
2625 prefixarg = con->prefix_arg;
|
|
|
2626 con->prefix_arg = Qnil;
|
|
|
2627 Vcurrent_prefix_arg = prefixarg;
|
|
|
2628 debug_on_next_call = 0; /* #### from FSFmacs; correct? */
|
|
|
2629
|
|
|
2630 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil)))
|
|
310
|
2631 return run_hook (Vdisabled_command_hook);
|
|
0
|
2632
|
|
|
2633 for (;;)
|
|
|
2634 {
|
|
|
2635 final = indirect_function (cmd, 1);
|
|
|
2636 if (CONSP (final) && EQ (Fcar (final), Qautoload))
|
|
|
2637 do_autoload (final, cmd);
|
|
|
2638 else
|
|
|
2639 break;
|
|
|
2640 }
|
|
|
2641
|
|
|
2642 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final))
|
|
|
2643 {
|
|
|
2644 backtrace.function = &Qcall_interactively;
|
|
|
2645 backtrace.args = &cmd;
|
|
|
2646 backtrace.nargs = 1;
|
|
|
2647 backtrace.evalargs = 0;
|
|
380
|
2648 backtrace.pdlcount = specpdl_depth();
|
|
0
|
2649 backtrace.debug_on_exit = 0;
|
|
116
|
2650 PUSH_BACKTRACE (backtrace);
|
|
0
|
2651
|
|
|
2652 final = Fcall_interactively (cmd, record, keys);
|
|
|
2653
|
|
116
|
2654 POP_BACKTRACE (backtrace);
|
|
173
|
2655 return final;
|
|
0
|
2656 }
|
|
|
2657 else if (STRINGP (final) || VECTORP (final))
|
|
|
2658 {
|
|
|
2659 return Fexecute_kbd_macro (final, prefixarg);
|
|
|
2660 }
|
|
|
2661 else
|
|
|
2662 {
|
|
|
2663 Fsignal (Qwrong_type_argument,
|
|
|
2664 Fcons (Qcommandp,
|
|
398
|
2665 (EQ (cmd, final)
|
|
0
|
2666 ? list1 (cmd)
|
|
|
2667 : list2 (cmd, final))));
|
|
|
2668 return Qnil;
|
|
|
2669 }
|
|
|
2670 }
|
|
|
2671
|
|
20
|
2672 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /*
|
|
0
|
2673 Return t if function in which this appears was called interactively.
|
|
|
2674 This means that the function was called with call-interactively (which
|
|
|
2675 includes being called as the binding of a key)
|
|
|
2676 and input is currently coming from the keyboard (not in keyboard macro).
|
|
20
|
2677 */
|
|
|
2678 ())
|
|
0
|
2679 {
|
|
|
2680 REGISTER struct backtrace *btp;
|
|
|
2681 REGISTER Lisp_Object fun;
|
|
|
2682
|
|
|
2683 if (!INTERACTIVE)
|
|
|
2684 return Qnil;
|
|
|
2685
|
|
|
2686 /* Unless the object was compiled, skip the frame of interactive-p itself
|
|
|
2687 (if interpreted) or the frame of byte-code (if called from a compiled
|
|
|
2688 function). Note that *btp->function may be a symbol pointing at a
|
|
|
2689 compiled function. */
|
|
|
2690 btp = backtrace_list;
|
|
|
2691
|
|
|
2692 #if 0 /* FSFmacs */
|
|
|
2693
|
|
|
2694 /* #### FSFmacs does the following instead. I can't figure
|
|
|
2695 out which one is more correct. */
|
|
|
2696 /* If this isn't a byte-compiled function, there may be a frame at
|
|
|
2697 the top for Finteractive_p itself. If so, skip it. */
|
|
|
2698 fun = Findirect_function (*btp->function);
|
|
|
2699 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p)
|
|
|
2700 btp = btp->next;
|
|
|
2701
|
|
|
2702 /* If we're running an Emacs 18-style byte-compiled function, there
|
|
|
2703 may be a frame for Fbyte_code. Now, given the strictest
|
|
|
2704 definition, this function isn't really being called
|
|
|
2705 interactively, but because that's the way Emacs 18 always builds
|
|
|
2706 byte-compiled functions, we'll accept it for now. */
|
|
|
2707 if (EQ (*btp->function, Qbyte_code))
|
|
|
2708 btp = btp->next;
|
|
|
2709
|
|
|
2710 /* If this isn't a byte-compiled function, then we may now be
|
|
|
2711 looking at several frames for special forms. Skip past them. */
|
|
185
|
2712 while (btp &&
|
|
0
|
2713 btp->nargs == UNEVALLED)
|
|
|
2714 btp = btp->next;
|
|
|
2715
|
|
|
2716 #else
|
|
|
2717
|
|
|
2718 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function))))
|
|
|
2719 btp = btp->next;
|
|
|
2720 for (;
|
|
|
2721 btp && (btp->nargs == UNEVALLED
|
|
|
2722 || EQ (*btp->function, Qbyte_code));
|
|
|
2723 btp = btp->next)
|
|
|
2724 {}
|
|
|
2725 /* btp now points at the frame of the innermost function
|
|
|
2726 that DOES eval its args.
|
|
|
2727 If it is a built-in function (such as load or eval-region)
|
|
|
2728 return nil. */
|
|
|
2729 /* Beats me why this is necessary, but it is */
|
|
|
2730 if (btp && EQ (*btp->function, Qcall_interactively))
|
|
|
2731 return Qt;
|
|
|
2732
|
|
|
2733 #endif
|
|
|
2734
|
|
|
2735 fun = Findirect_function (*btp->function);
|
|
|
2736 if (SUBRP (fun))
|
|
|
2737 return Qnil;
|
|
|
2738 /* btp points to the frame of a Lisp function that called interactive-p.
|
|
|
2739 Return t if that function was called interactively. */
|
|
|
2740 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively))
|
|
|
2741 return Qt;
|
|
|
2742 return Qnil;
|
|
|
2743 }
|
|
|
2744
|
|
|
2745
|
|
380
|
2746 /************************************************************************/
|
|
|
2747 /* Autoloading */
|
|
|
2748 /************************************************************************/
|
|
0
|
2749
|
|
20
|
2750 DEFUN ("autoload", Fautoload, 2, 5, 0, /*
|
|
0
|
2751 Define FUNCTION to autoload from FILE.
|
|
|
2752 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
|
|
|
2753 Third arg DOCSTRING is documentation for the function.
|
|
|
2754 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
|
|
|
2755 Fifth arg TYPE indicates the type of the object:
|
|
|
2756 nil or omitted says FUNCTION is a function,
|
|
|
2757 `keymap' says FUNCTION is really a keymap, and
|
|
|
2758 `macro' or t says FUNCTION is really a macro.
|
|
|
2759 Third through fifth args give info about the real definition.
|
|
|
2760 They default to nil.
|
|
|
2761 If FUNCTION is already defined other than as an autoload,
|
|
|
2762 this does nothing and returns nil.
|
|
20
|
2763 */
|
|
|
2764 (function, file, docstring, interactive, type))
|
|
0
|
2765 {
|
|
|
2766 /* This function can GC */
|
|
|
2767 CHECK_SYMBOL (function);
|
|
|
2768 CHECK_STRING (file);
|
|
|
2769
|
|
|
2770 /* If function is defined and not as an autoload, don't override */
|
|
380
|
2771 {
|
|
|
2772 Lisp_Object f = XSYMBOL (function)->function;
|
|
|
2773 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload)))
|
|
|
2774 return Qnil;
|
|
|
2775 }
|
|
0
|
2776
|
|
|
2777 if (purify_flag)
|
|
|
2778 {
|
|
|
2779 /* Attempt to avoid consing identical (string=) pure strings. */
|
|
|
2780 file = Fsymbol_name (Fintern (file, Qnil));
|
|
|
2781 }
|
|
|
2782
|
|
398
|
2783 return Ffset (function, Fcons (Qautoload, list4 (file,
|
|
|
2784 docstring,
|
|
|
2785 interactive,
|
|
|
2786 type)));
|
|
0
|
2787 }
|
|
|
2788
|
|
|
2789 Lisp_Object
|
|
|
2790 un_autoload (Lisp_Object oldqueue)
|
|
|
2791 {
|
|
|
2792 /* This function can GC */
|
|
|
2793 REGISTER Lisp_Object queue, first, second;
|
|
|
2794
|
|
|
2795 /* Queue to unwind is current value of Vautoload_queue.
|
|
|
2796 oldqueue is the shadowed value to leave in Vautoload_queue. */
|
|
|
2797 queue = Vautoload_queue;
|
|
|
2798 Vautoload_queue = oldqueue;
|
|
|
2799 while (CONSP (queue))
|
|
|
2800 {
|
|
380
|
2801 first = XCAR (queue);
|
|
0
|
2802 second = Fcdr (first);
|
|
|
2803 first = Fcar (first);
|
|
|
2804 if (NILP (second))
|
|
|
2805 Vfeatures = first;
|
|
|
2806 else
|
|
|
2807 Ffset (first, second);
|
|
|
2808 queue = Fcdr (queue);
|
|
|
2809 }
|
|
|
2810 return Qnil;
|
|
|
2811 }
|
|
|
2812
|
|
|
2813 void
|
|
185
|
2814 do_autoload (Lisp_Object fundef,
|
|
0
|
2815 Lisp_Object funname)
|
|
|
2816 {
|
|
|
2817 /* This function can GC */
|
|
380
|
2818 int speccount = specpdl_depth();
|
|
0
|
2819 Lisp_Object fun = funname;
|
|
|
2820 struct gcpro gcpro1, gcpro2;
|
|
|
2821
|
|
|
2822 CHECK_SYMBOL (funname);
|
|
|
2823 GCPRO2 (fun, funname);
|
|
|
2824
|
|
|
2825 /* Value saved here is to be restored into Vautoload_queue */
|
|
|
2826 record_unwind_protect (un_autoload, Vautoload_queue);
|
|
|
2827 Vautoload_queue = Qt;
|
|
380
|
2828 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil);
|
|
0
|
2829
|
|
|
2830 {
|
|
380
|
2831 Lisp_Object queue;
|
|
0
|
2832
|
|
|
2833 /* Save the old autoloads, in case we ever do an unload. */
|
|
380
|
2834 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue))
|
|
|
2835 {
|
|
|
2836 Lisp_Object first = XCAR (queue);
|
|
|
2837 Lisp_Object second = Fcdr (first);
|
|
|
2838
|
|
|
2839 first = Fcar (first);
|
|
|
2840
|
|
|
2841 /* Note: This test is subtle. The cdr of an autoload-queue entry
|
|
|
2842 may be an atom if the autoload entry was generated by a defalias
|
|
|
2843 or fset. */
|
|
|
2844 if (CONSP (second))
|
|
|
2845 Fput (first, Qautoload, (XCDR (second)));
|
|
|
2846 }
|
|
0
|
2847 }
|
|
|
2848
|
|
|
2849 /* Once loading finishes, don't undo it. */
|
|
|
2850 Vautoload_queue = Qt;
|
|
|
2851 unbind_to (speccount, Qnil);
|
|
|
2852
|
|
|
2853 fun = indirect_function (fun, 0);
|
|
|
2854
|
|
|
2855 #if 0 /* FSFmacs */
|
|
|
2856 if (!NILP (Fequal (fun, fundef)))
|
|
|
2857 #else
|
|
|
2858 if (UNBOUNDP (fun)
|
|
|
2859 || (CONSP (fun)
|
|
|
2860 && EQ (XCAR (fun), Qautoload)))
|
|
|
2861 #endif
|
|
|
2862 error ("Autoloading failed to define function %s",
|
|
|
2863 string_data (XSYMBOL (funname)->name));
|
|
|
2864 UNGCPRO;
|
|
|
2865 }
|
|
|
2866
|
|
|
2867
|
|
380
|
2868 /************************************************************************/
|
|
|
2869 /* eval, funcall, apply */
|
|
|
2870 /************************************************************************/
|
|
0
|
2871
|
|
185
|
2872 static Lisp_Object funcall_lambda (Lisp_Object fun,
|
|
398
|
2873 int nargs, Lisp_Object args[]);
|
|
0
|
2874 static int in_warnings;
|
|
|
2875
|
|
|
2876 static Lisp_Object
|
|
|
2877 in_warnings_restore (Lisp_Object minimus)
|
|
|
2878 {
|
|
|
2879 in_warnings = 0;
|
|
|
2880 return Qnil;
|
|
|
2881 }
|
|
|
2882
|
|
20
|
2883 DEFUN ("eval", Feval, 1, 1, 0, /*
|
|
0
|
2884 Evaluate FORM and return its value.
|
|
20
|
2885 */
|
|
|
2886 (form))
|
|
0
|
2887 {
|
|
|
2888 /* This function can GC */
|
|
|
2889 Lisp_Object fun, val, original_fun, original_args;
|
|
|
2890 int nargs;
|
|
|
2891 struct backtrace backtrace;
|
|
|
2892
|
|
|
2893 /* I think this is a pretty safe place to call Lisp code, don't you? */
|
|
|
2894 while (!in_warnings && !NILP (Vpending_warnings))
|
|
|
2895 {
|
|
|
2896 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
380
|
2897 int speccount = specpdl_depth();
|
|
0
|
2898 Lisp_Object this_warning_cons, this_warning, class, level, messij;
|
|
|
2899
|
|
|
2900 record_unwind_protect (in_warnings_restore, Qnil);
|
|
|
2901 in_warnings = 1;
|
|
|
2902 this_warning_cons = Vpending_warnings;
|
|
|
2903 this_warning = XCAR (this_warning_cons);
|
|
|
2904 /* in case an error occurs in the warn function, at least
|
|
|
2905 it won't happen infinitely */
|
|
|
2906 Vpending_warnings = XCDR (Vpending_warnings);
|
|
|
2907 free_cons (XCONS (this_warning_cons));
|
|
|
2908 class = XCAR (this_warning);
|
|
|
2909 level = XCAR (XCDR (this_warning));
|
|
|
2910 messij = XCAR (XCDR (XCDR (this_warning)));
|
|
|
2911 free_list (this_warning);
|
|
185
|
2912
|
|
0
|
2913 if (NILP (Vpending_warnings))
|
|
|
2914 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary,
|
|
|
2915 but safer */
|
|
|
2916
|
|
|
2917 GCPRO4 (form, class, level, messij);
|
|
|
2918 if (!STRINGP (messij))
|
|
|
2919 messij = Fprin1_to_string (messij, Qnil);
|
|
|
2920 call3 (Qdisplay_warning, class, messij, level);
|
|
|
2921 UNGCPRO;
|
|
|
2922 unbind_to (speccount, Qnil);
|
|
|
2923 }
|
|
|
2924
|
|
|
2925 if (!CONSP (form))
|
|
380
|
2926 {
|
|
|
2927 if (SYMBOLP (form))
|
|
|
2928 return Fsymbol_value (form);
|
|
|
2929 else
|
|
|
2930 return form;
|
|
|
2931 }
|
|
0
|
2932
|
|
|
2933 QUIT;
|
|
|
2934 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
2935 {
|
|
|
2936 struct gcpro gcpro1;
|
|
|
2937 GCPRO1 (form);
|
|
|
2938 garbage_collect_1 ();
|
|
|
2939 UNGCPRO;
|
|
|
2940 }
|
|
|
2941
|
|
|
2942 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2943 {
|
|
|
2944 if (max_lisp_eval_depth < 100)
|
|
|
2945 max_lisp_eval_depth = 100;
|
|
|
2946 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
2947 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
2948 }
|
|
|
2949
|
|
380
|
2950 /* We guaranteed CONSP (form) above */
|
|
|
2951 original_fun = XCAR (form);
|
|
195
|
2952 original_args = XCDR (form);
|
|
|
2953
|
|
380
|
2954 GET_EXTERNAL_LIST_LENGTH (original_args, nargs);
|
|
|
2955
|
|
|
2956 backtrace.pdlcount = specpdl_depth();
|
|
0
|
2957 backtrace.function = &original_fun; /* This also protects them from gc */
|
|
|
2958 backtrace.args = &original_args;
|
|
|
2959 backtrace.nargs = UNEVALLED;
|
|
|
2960 backtrace.evalargs = 1;
|
|
|
2961 backtrace.debug_on_exit = 0;
|
|
116
|
2962 PUSH_BACKTRACE (backtrace);
|
|
0
|
2963
|
|
|
2964 if (debug_on_next_call)
|
|
|
2965 do_debug_on_call (Qt);
|
|
|
2966
|
|
245
|
2967 if (profiling_active)
|
|
|
2968 profile_increase_call_count (original_fun);
|
|
|
2969
|
|
0
|
2970 /* At this point, only original_fun and original_args
|
|
380
|
2971 have values that will be used below. */
|
|
0
|
2972 retry:
|
|
|
2973 fun = indirect_function (original_fun, 1);
|
|
|
2974
|
|
|
2975 if (SUBRP (fun))
|
|
|
2976 {
|
|
380
|
2977 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
2978 int max_args = subr->max_args;
|
|
380
|
2979
|
|
|
2980 if (nargs < subr->min_args)
|
|
|
2981 goto wrong_number_of_arguments;
|
|
|
2982
|
|
|
2983 if (max_args == UNEVALLED) /* Optimize for the common case */
|
|
0
|
2984 {
|
|
|
2985 backtrace.evalargs = 0;
|
|
398
|
2986 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr))
|
|
380
|
2987 (original_args));
|
|
0
|
2988 }
|
|
380
|
2989 else if (nargs <= max_args)
|
|
|
2990 {
|
|
|
2991 struct gcpro gcpro1;
|
|
|
2992 Lisp_Object args[SUBR_MAX_ARGS];
|
|
|
2993 REGISTER Lisp_Object *p = args;
|
|
|
2994
|
|
|
2995 GCPRO1 (args[0]);
|
|
|
2996 gcpro1.nvars = 0;
|
|
|
2997
|
|
|
2998 {
|
|
|
2999 REGISTER Lisp_Object arg;
|
|
|
3000 LIST_LOOP_2 (arg, original_args)
|
|
|
3001 {
|
|
|
3002 *p++ = Feval (arg);
|
|
|
3003 gcpro1.nvars++;
|
|
|
3004 }
|
|
|
3005 }
|
|
|
3006
|
|
|
3007 /* &optional args default to nil. */
|
|
|
3008 while (p - args < max_args)
|
|
|
3009 *p++ = Qnil;
|
|
|
3010
|
|
|
3011 backtrace.args = args;
|
|
|
3012 backtrace.nargs = nargs;
|
|
|
3013
|
|
|
3014 FUNCALL_SUBR (val, subr, args, max_args);
|
|
|
3015
|
|
|
3016 UNGCPRO;
|
|
|
3017 }
|
|
0
|
3018 else if (max_args == MANY)
|
|
|
3019 {
|
|
|
3020 /* Pass a vector of evaluated arguments */
|
|
380
|
3021 struct gcpro gcpro1;
|
|
|
3022 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3023 REGISTER Lisp_Object *p = args;
|
|
|
3024
|
|
|
3025 GCPRO1 (args[0]);
|
|
|
3026 gcpro1.nvars = 0;
|
|
|
3027
|
|
|
3028 {
|
|
|
3029 REGISTER Lisp_Object arg;
|
|
|
3030 LIST_LOOP_2 (arg, original_args)
|
|
|
3031 {
|
|
|
3032 *p++ = Feval (arg);
|
|
|
3033 gcpro1.nvars++;
|
|
|
3034 }
|
|
|
3035 }
|
|
|
3036
|
|
|
3037 backtrace.args = args;
|
|
0
|
3038 backtrace.nargs = nargs;
|
|
|
3039
|
|
398
|
3040 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr))
|
|
380
|
3041 (nargs, args));
|
|
185
|
3042
|
|
0
|
3043 UNGCPRO;
|
|
380
|
3044 }
|
|
|
3045 else
|
|
|
3046 {
|
|
|
3047 wrong_number_of_arguments:
|
|
398
|
3048 val = signal_wrong_number_of_arguments_error (original_fun, nargs);
|
|
380
|
3049 }
|
|
0
|
3050 }
|
|
|
3051 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3052 {
|
|
380
|
3053 struct gcpro gcpro1;
|
|
|
3054 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3055 REGISTER Lisp_Object *p = args;
|
|
|
3056
|
|
|
3057 GCPRO1 (args[0]);
|
|
|
3058 gcpro1.nvars = 0;
|
|
|
3059
|
|
|
3060 {
|
|
|
3061 REGISTER Lisp_Object arg;
|
|
|
3062 LIST_LOOP_2 (arg, original_args)
|
|
|
3063 {
|
|
|
3064 *p++ = Feval (arg);
|
|
|
3065 gcpro1.nvars++;
|
|
|
3066 }
|
|
|
3067 }
|
|
|
3068
|
|
|
3069 backtrace.args = args;
|
|
|
3070 backtrace.nargs = nargs;
|
|
|
3071 backtrace.evalargs = 0;
|
|
|
3072
|
|
|
3073 val = funcall_compiled_function (fun, nargs, args);
|
|
|
3074
|
|
|
3075 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3076 if (backtrace.debug_on_exit)
|
|
|
3077 val = do_debug_on_exit (val);
|
|
|
3078 /* Don't do it again when we return to eval. */
|
|
|
3079 backtrace.debug_on_exit = 0;
|
|
|
3080
|
|
|
3081 UNGCPRO;
|
|
|
3082 }
|
|
|
3083 else if (CONSP (fun))
|
|
|
3084 {
|
|
|
3085 Lisp_Object funcar = XCAR (fun);
|
|
|
3086
|
|
0
|
3087 if (EQ (funcar, Qautoload))
|
|
|
3088 {
|
|
|
3089 do_autoload (fun, original_fun);
|
|
|
3090 goto retry;
|
|
|
3091 }
|
|
380
|
3092 else if (EQ (funcar, Qmacro))
|
|
|
3093 {
|
|
|
3094 val = Feval (apply1 (XCDR (fun), original_args));
|
|
|
3095 }
|
|
0
|
3096 else if (EQ (funcar, Qlambda))
|
|
380
|
3097 {
|
|
|
3098 struct gcpro gcpro1;
|
|
|
3099 Lisp_Object *args = alloca_array (Lisp_Object, nargs);
|
|
|
3100 REGISTER Lisp_Object *p = args;
|
|
|
3101
|
|
|
3102 GCPRO1 (args[0]);
|
|
|
3103 gcpro1.nvars = 0;
|
|
|
3104
|
|
|
3105 {
|
|
|
3106 REGISTER Lisp_Object arg;
|
|
|
3107 LIST_LOOP_2 (arg, original_args)
|
|
|
3108 {
|
|
|
3109 *p++ = Feval (arg);
|
|
|
3110 gcpro1.nvars++;
|
|
|
3111 }
|
|
|
3112 }
|
|
|
3113
|
|
|
3114 UNGCPRO;
|
|
|
3115
|
|
|
3116 backtrace.args = args; /* this also GCPROs `args' */
|
|
|
3117 backtrace.nargs = nargs;
|
|
|
3118 backtrace.evalargs = 0;
|
|
|
3119
|
|
|
3120 val = funcall_lambda (fun, nargs, args);
|
|
|
3121
|
|
|
3122 /* Do the debug-on-exit now, while args is still GCPROed. */
|
|
|
3123 if (backtrace.debug_on_exit)
|
|
|
3124 val = do_debug_on_exit (val);
|
|
|
3125 /* Don't do it again when we return to eval. */
|
|
|
3126 backtrace.debug_on_exit = 0;
|
|
|
3127 }
|
|
0
|
3128 else
|
|
|
3129 {
|
|
380
|
3130 goto invalid_function;
|
|
0
|
3131 }
|
|
|
3132 }
|
|
380
|
3133 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun)) */
|
|
|
3134 {
|
|
|
3135 invalid_function:
|
|
398
|
3136 val = signal_invalid_function_error (fun);
|
|
380
|
3137 }
|
|
0
|
3138
|
|
|
3139 lisp_eval_depth--;
|
|
|
3140 if (backtrace.debug_on_exit)
|
|
|
3141 val = do_debug_on_exit (val);
|
|
116
|
3142 POP_BACKTRACE (backtrace);
|
|
173
|
3143 return val;
|
|
0
|
3144 }
|
|
|
3145
|
|
|
3146
|
|
380
|
3147 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /*
|
|
|
3148 Call first argument as a function, passing the remaining arguments to it.
|
|
|
3149 Thus, (funcall 'cons 'x 'y) returns (x . y).
|
|
|
3150 */
|
|
|
3151 (int nargs, Lisp_Object *args))
|
|
0
|
3152 {
|
|
|
3153 /* This function can GC */
|
|
|
3154 Lisp_Object fun;
|
|
|
3155 Lisp_Object val;
|
|
|
3156 struct backtrace backtrace;
|
|
380
|
3157 int fun_nargs = nargs - 1;
|
|
|
3158 Lisp_Object *fun_args = args + 1;
|
|
0
|
3159
|
|
|
3160 QUIT;
|
|
|
3161 if ((consing_since_gc > gc_cons_threshold) || always_gc)
|
|
|
3162 /* Callers should gcpro lexpr args */
|
|
|
3163 garbage_collect_1 ();
|
|
|
3164
|
|
|
3165 if (++lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3166 {
|
|
|
3167 if (max_lisp_eval_depth < 100)
|
|
|
3168 max_lisp_eval_depth = 100;
|
|
|
3169 if (lisp_eval_depth > max_lisp_eval_depth)
|
|
|
3170 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
|
|
|
3171 }
|
|
|
3172
|
|
380
|
3173 backtrace.pdlcount = specpdl_depth();
|
|
0
|
3174 backtrace.function = &args[0];
|
|
380
|
3175 backtrace.args = fun_args;
|
|
|
3176 backtrace.nargs = fun_nargs;
|
|
0
|
3177 backtrace.evalargs = 0;
|
|
|
3178 backtrace.debug_on_exit = 0;
|
|
116
|
3179 PUSH_BACKTRACE (backtrace);
|
|
0
|
3180
|
|
|
3181 if (debug_on_next_call)
|
|
|
3182 do_debug_on_call (Qlambda);
|
|
|
3183
|
|
|
3184 retry:
|
|
|
3185
|
|
|
3186 fun = args[0];
|
|
|
3187
|
|
241
|
3188 /* It might be useful to place this *after* all the checks. */
|
|
|
3189 if (profiling_active)
|
|
|
3190 profile_increase_call_count (fun);
|
|
|
3191
|
|
380
|
3192 /* We could call indirect_function directly, but profiling shows
|
|
|
3193 this is worth optimizing by partially unrolling the loop. */
|
|
0
|
3194 if (SYMBOLP (fun))
|
|
380
|
3195 {
|
|
|
3196 fun = XSYMBOL (fun)->function;
|
|
|
3197 if (SYMBOLP (fun))
|
|
|
3198 {
|
|
|
3199 fun = XSYMBOL (fun)->function;
|
|
|
3200 if (SYMBOLP (fun))
|
|
|
3201 fun = indirect_function (fun, 1);
|
|
|
3202 }
|
|
|
3203 }
|
|
0
|
3204
|
|
|
3205 if (SUBRP (fun))
|
|
|
3206 {
|
|
380
|
3207 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
3208 int max_args = subr->max_args;
|
|
380
|
3209 Lisp_Object spacious_args[SUBR_MAX_ARGS];
|
|
|
3210
|
|
|
3211 if (fun_nargs == max_args) /* Optimize for the common case */
|
|
0
|
3212 {
|
|
380
|
3213 funcall_subr:
|
|
|
3214 FUNCALL_SUBR (val, subr, fun_args, max_args);
|
|
0
|
3215 }
|
|
398
|
3216 else if (fun_nargs < subr->min_args)
|
|
|
3217 {
|
|
|
3218 goto wrong_number_of_arguments;
|
|
|
3219 }
|
|
380
|
3220 else if (fun_nargs < max_args)
|
|
0
|
3221 {
|
|
380
|
3222 Lisp_Object *p = spacious_args;
|
|
0
|
3223
|
|
|
3224 /* Default optionals to nil */
|
|
380
|
3225 while (fun_nargs--)
|
|
|
3226 *p++ = *fun_args++;
|
|
|
3227 while (p - spacious_args < max_args)
|
|
|
3228 *p++ = Qnil;
|
|
|
3229
|
|
|
3230 fun_args = spacious_args;
|
|
|
3231 goto funcall_subr;
|
|
|
3232 }
|
|
|
3233 else if (max_args == MANY)
|
|
|
3234 {
|
|
398
|
3235 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args);
|
|
380
|
3236 }
|
|
|
3237 else if (max_args == UNEVALLED) /* Can't funcall a special form */
|
|
|
3238 {
|
|
|
3239 goto invalid_function;
|
|
0
|
3240 }
|
|
|
3241 else
|
|
380
|
3242 {
|
|
|
3243 wrong_number_of_arguments:
|
|
398
|
3244 val = signal_wrong_number_of_arguments_error (fun, fun_nargs);
|
|
380
|
3245 }
|
|
0
|
3246 }
|
|
|
3247 else if (COMPILED_FUNCTIONP (fun))
|
|
|
3248 {
|
|
380
|
3249 val = funcall_compiled_function (fun, fun_nargs, fun_args);
|
|
0
|
3250 }
|
|
380
|
3251 else if (CONSP (fun))
|
|
0
|
3252 {
|
|
195
|
3253 Lisp_Object funcar = XCAR (fun);
|
|
0
|
3254
|
|
|
3255 if (EQ (funcar, Qlambda))
|
|
380
|
3256 {
|
|
|
3257 val = funcall_lambda (fun, fun_nargs, fun_args);
|
|
|
3258 }
|
|
0
|
3259 else if (EQ (funcar, Qautoload))
|
|
|
3260 {
|
|
|
3261 do_autoload (fun, args[0]);
|
|
|
3262 goto retry;
|
|
|
3263 }
|
|
380
|
3264 else /* Can't funcall a macro */
|
|
0
|
3265 {
|
|
380
|
3266 goto invalid_function;
|
|
0
|
3267 }
|
|
|
3268 }
|
|
380
|
3269 else if (UNBOUNDP (fun))
|
|
|
3270 {
|
|
398
|
3271 val = signal_void_function_error (args[0]);
|
|
380
|
3272 }
|
|
|
3273 else
|
|
|
3274 {
|
|
|
3275 invalid_function:
|
|
398
|
3276 val = signal_invalid_function_error (fun);
|
|
380
|
3277 }
|
|
|
3278
|
|
0
|
3279 lisp_eval_depth--;
|
|
|
3280 if (backtrace.debug_on_exit)
|
|
|
3281 val = do_debug_on_exit (val);
|
|
116
|
3282 POP_BACKTRACE (backtrace);
|
|
0
|
3283 return val;
|
|
|
3284 }
|
|
|
3285
|
|
380
|
3286 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /*
|
|
|
3287 Return t if OBJECT can be called as a function, else nil.
|
|
|
3288 A function is an object that can be applied to arguments,
|
|
|
3289 using for example `funcall' or `apply'.
|
|
20
|
3290 */
|
|
380
|
3291 (object))
|
|
0
|
3292 {
|
|
380
|
3293 if (SYMBOLP (object))
|
|
|
3294 object = indirect_function (object, 0);
|
|
|
3295
|
|
|
3296 return
|
|
|
3297 (SUBRP (object) ||
|
|
|
3298 COMPILED_FUNCTIONP (object) ||
|
|
|
3299 (CONSP (object) &&
|
|
|
3300 (EQ (XCAR (object), Qlambda) ||
|
|
|
3301 EQ (XCAR (object), Qautoload))))
|
|
|
3302 ? Qt : Qnil;
|
|
0
|
3303 }
|
|
|
3304
|
|
380
|
3305 static Lisp_Object
|
|
|
3306 function_argcount (Lisp_Object function, int function_min_args_p)
|
|
0
|
3307 {
|
|
|
3308 Lisp_Object orig_function = function;
|
|
|
3309 Lisp_Object arglist;
|
|
|
3310
|
|
|
3311 retry:
|
|
|
3312
|
|
|
3313 if (SYMBOLP (function))
|
|
|
3314 function = indirect_function (function, 1);
|
|
|
3315
|
|
|
3316 if (SUBRP (function))
|
|
|
3317 {
|
|
410
|
3318 /* Using return with the ?: operator tickles a DEC CC compiler bug. */
|
|
|
3319 if (function_min_args_p)
|
|
|
3320 return Fsubr_min_args (function);
|
|
|
3321 else
|
|
|
3322 return Fsubr_max_args (function);
|
|
380
|
3323 }
|
|
|
3324 else if (COMPILED_FUNCTIONP (function))
|
|
|
3325 {
|
|
|
3326 arglist = compiled_function_arglist (XCOMPILED_FUNCTION (function));
|
|
0
|
3327 }
|
|
380
|
3328 else if (CONSP (function))
|
|
0
|
3329 {
|
|
272
|
3330 Lisp_Object funcar = XCAR (function);
|
|
0
|
3331
|
|
|
3332 if (EQ (funcar, Qmacro))
|
|
|
3333 {
|
|
272
|
3334 function = XCDR (function);
|
|
0
|
3335 goto retry;
|
|
|
3336 }
|
|
380
|
3337 else if (EQ (funcar, Qautoload))
|
|
0
|
3338 {
|
|
|
3339 do_autoload (function, orig_function);
|
|
|
3340 goto retry;
|
|
|
3341 }
|
|
380
|
3342 else if (EQ (funcar, Qlambda))
|
|
|
3343 {
|
|
|
3344 arglist = Fcar (XCDR (function));
|
|
|
3345 }
|
|
0
|
3346 else
|
|
380
|
3347 {
|
|
|
3348 goto invalid_function;
|
|
|
3349 }
|
|
0
|
3350 }
|
|
|
3351 else
|
|
|
3352 {
|
|
|
3353 invalid_function:
|
|
398
|
3354 return signal_invalid_function_error (function);
|
|
0
|
3355 }
|
|
|
3356
|
|
380
|
3357 {
|
|
|
3358 int argcount = 0;
|
|
|
3359 Lisp_Object arg;
|
|
|
3360
|
|
|
3361 EXTERNAL_LIST_LOOP_2 (arg, arglist)
|
|
|
3362 {
|
|
|
3363 if (EQ (arg, Qand_optional))
|
|
|
3364 {
|
|
|
3365 if (function_min_args_p)
|
|
|
3366 break;
|
|
|
3367 }
|
|
|
3368 else if (EQ (arg, Qand_rest))
|
|
|
3369 {
|
|
|
3370 if (function_min_args_p)
|
|
|
3371 break;
|
|
|
3372 else
|
|
|
3373 return Qnil;
|
|
|
3374 }
|
|
|
3375 else
|
|
|
3376 {
|
|
|
3377 argcount++;
|
|
|
3378 }
|
|
|
3379 }
|
|
|
3380
|
|
|
3381 return make_int (argcount);
|
|
|
3382 }
|
|
|
3383 }
|
|
|
3384
|
|
|
3385 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /*
|
|
|
3386 Return the number of arguments a function may be called with.
|
|
|
3387 The function may be any form that can be passed to `funcall',
|
|
|
3388 any special form, or any macro.
|
|
|
3389 */
|
|
|
3390 (function))
|
|
|
3391 {
|
|
|
3392 return function_argcount (function, 1);
|
|
|
3393 }
|
|
|
3394
|
|
|
3395 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /*
|
|
|
3396 Return the number of arguments a function may be called with.
|
|
|
3397 The function may be any form that can be passed to `funcall',
|
|
|
3398 any special form, or any macro.
|
|
|
3399 If the function takes an arbitrary number of arguments or is
|
|
|
3400 a built-in special form, nil is returned.
|
|
|
3401 */
|
|
|
3402 (function))
|
|
|
3403 {
|
|
|
3404 return function_argcount (function, 0);
|
|
0
|
3405 }
|
|
|
3406
|
|
|
3407
|
|
20
|
3408 DEFUN ("apply", Fapply, 2, MANY, 0, /*
|
|
380
|
3409 Call FUNCTION with the remaining args, using the last arg as a list of args.
|
|
0
|
3410 Thus, (apply '+ 1 2 '(3 4)) returns 10.
|
|
20
|
3411 */
|
|
|
3412 (int nargs, Lisp_Object *args))
|
|
0
|
3413 {
|
|
|
3414 /* This function can GC */
|
|
|
3415 Lisp_Object fun = args[0];
|
|
380
|
3416 Lisp_Object spread_arg = args [nargs - 1];
|
|
0
|
3417 int numargs;
|
|
|
3418 int funcall_nargs;
|
|
|
3419
|
|
380
|
3420 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs);
|
|
0
|
3421
|
|
|
3422 if (numargs == 0)
|
|
|
3423 /* (apply foo 0 1 '()) */
|
|
|
3424 return Ffuncall (nargs - 1, args);
|
|
|
3425 else if (numargs == 1)
|
|
|
3426 {
|
|
|
3427 /* (apply foo 0 1 '(2)) */
|
|
|
3428 args [nargs - 1] = XCAR (spread_arg);
|
|
|
3429 return Ffuncall (nargs, args);
|
|
|
3430 }
|
|
|
3431
|
|
|
3432 /* -1 for function, -1 for spread arg */
|
|
|
3433 numargs = nargs - 2 + numargs;
|
|
|
3434 /* +1 for function */
|
|
|
3435 funcall_nargs = 1 + numargs;
|
|
|
3436
|
|
|
3437 if (SYMBOLP (fun))
|
|
|
3438 fun = indirect_function (fun, 0);
|
|
380
|
3439
|
|
|
3440 if (SUBRP (fun))
|
|
0
|
3441 {
|
|
380
|
3442 Lisp_Subr *subr = XSUBR (fun);
|
|
0
|
3443 int max_args = subr->max_args;
|
|
|
3444
|
|
|
3445 if (numargs < subr->min_args
|
|
|
3446 || (max_args >= 0 && max_args < numargs))
|
|
|
3447 {
|
|
|
3448 /* Let funcall get the error */
|
|
|
3449 }
|
|
|
3450 else if (max_args > numargs)
|
|
|
3451 {
|
|
|
3452 /* Avoid having funcall cons up yet another new vector of arguments
|
|
|
3453 by explicitly supplying nil's for optional values */
|
|
|
3454 funcall_nargs += (max_args - numargs);
|
|
|
3455 }
|
|
|
3456 }
|
|
380
|
3457 else if (UNBOUNDP (fun))
|
|
|
3458 {
|
|
|
3459 /* Let funcall get the error */
|
|
|
3460 fun = args[0];
|
|
|
3461 }
|
|
|
3462
|
|
0
|
3463 {
|
|
|
3464 REGISTER int i;
|
|
185
|
3465 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs);
|
|
0
|
3466 struct gcpro gcpro1;
|
|
|
3467
|
|
|
3468 GCPRO1 (*funcall_args);
|
|
|
3469 gcpro1.nvars = funcall_nargs;
|
|
|
3470
|
|
|
3471 /* Copy in the unspread args */
|
|
|
3472 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object));
|
|
|
3473 /* Spread the last arg we got. Its first element goes in
|
|
|
3474 the slot that it used to occupy, hence this value of I. */
|
|
185
|
3475 for (i = nargs - 1;
|
|
0
|
3476 !NILP (spread_arg); /* i < 1 + numargs */
|
|
|
3477 i++, spread_arg = XCDR (spread_arg))
|
|
|
3478 {
|
|
|
3479 funcall_args [i] = XCAR (spread_arg);
|
|
|
3480 }
|
|
|
3481 /* Supply nil for optional args (to subrs) */
|
|
|
3482 for (; i < funcall_nargs; i++)
|
|
|
3483 funcall_args[i] = Qnil;
|
|
|
3484
|
|
|
3485
|
|
|
3486 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args));
|
|
|
3487 }
|
|
|
3488 }
|
|
|
3489
|
|
|
3490
|
|
380
|
3491 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and
|
|
|
3492 return the result of evaluation. */
|
|
0
|
3493
|
|
|
3494 static Lisp_Object
|
|
380
|
3495 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[])
|
|
0
|
3496 {
|
|
|
3497 /* This function can GC */
|
|
380
|
3498 Lisp_Object symbol, arglist, body, tail;
|
|
|
3499 int speccount = specpdl_depth();
|
|
|
3500 REGISTER int i = 0;
|
|
|
3501
|
|
|
3502 tail = XCDR (fun);
|
|
|
3503
|
|
|
3504 if (!CONSP (tail))
|
|
|
3505 goto invalid_function;
|
|
|
3506
|
|
|
3507 arglist = XCAR (tail);
|
|
|
3508 body = XCDR (tail);
|
|
|
3509
|
|
|
3510 {
|
|
|
3511 int optional = 0, rest = 0;
|
|
|
3512
|
|
|
3513 EXTERNAL_LIST_LOOP_3 (symbol, arglist, tail)
|
|
|
3514 {
|
|
|
3515 if (!SYMBOLP (symbol))
|
|
|
3516 goto invalid_function;
|
|
|
3517 if (EQ (symbol, Qand_rest))
|
|
|
3518 rest = 1;
|
|
|
3519 else if (EQ (symbol, Qand_optional))
|
|
|
3520 optional = 1;
|
|
|
3521 else if (rest)
|
|
|
3522 {
|
|
|
3523 specbind (symbol, Flist (nargs - i, &args[i]));
|
|
|
3524 i = nargs;
|
|
|
3525 }
|
|
|
3526 else if (i < nargs)
|
|
|
3527 specbind (symbol, args[i++]);
|
|
|
3528 else if (!optional)
|
|
|
3529 goto wrong_number_of_arguments;
|
|
|
3530 else
|
|
|
3531 specbind (symbol, Qnil);
|
|
|
3532 }
|
|
|
3533 }
|
|
0
|
3534
|
|
|
3535 if (i < nargs)
|
|
380
|
3536 goto wrong_number_of_arguments;
|
|
|
3537
|
|
|
3538 return unbind_to (speccount, Fprogn (body));
|
|
|
3539
|
|
|
3540 wrong_number_of_arguments:
|
|
398
|
3541 return signal_wrong_number_of_arguments_error (fun, nargs);
|
|
380
|
3542
|
|
|
3543 invalid_function:
|
|
398
|
3544 return signal_invalid_function_error (fun);
|
|
0
|
3545 }
|
|
380
|
3546
|
|
0
|
3547
|
|
380
|
3548 /************************************************************************/
|
|
|
3549 /* Run hook variables in various ways. */
|
|
|
3550 /************************************************************************/
|
|
0
|
3551
|
|
20
|
3552 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /*
|
|
0
|
3553 Run each hook in HOOKS. Major mode functions use this.
|
|
|
3554 Each argument should be a symbol, a hook variable.
|
|
|
3555 These symbols are processed in the order specified.
|
|
|
3556 If a hook symbol has a non-nil value, that value may be a function
|
|
|
3557 or a list of functions to be called to run the hook.
|
|
|
3558 If the value is a function, it is called with no arguments.
|
|
|
3559 If it is a list, the elements are called, in order, with no arguments.
|
|
|
3560
|
|
|
3561 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3562 not `make-local-variable'.
|
|
20
|
3563 */
|
|
|
3564 (int nargs, Lisp_Object *args))
|
|
0
|
3565 {
|
|
|
3566 REGISTER int i;
|
|
|
3567
|
|
|
3568 for (i = 0; i < nargs; i++)
|
|
187
|
3569 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION);
|
|
0
|
3570
|
|
|
3571 return Qnil;
|
|
|
3572 }
|
|
185
|
3573
|
|
20
|
3574 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /*
|
|
0
|
3575 Run HOOK with the specified arguments ARGS.
|
|
|
3576 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
|
|
|
3577 value, that value may be a function or a list of functions to be
|
|
|
3578 called to run the hook. If the value is a function, it is called with
|
|
|
3579 the given arguments and its return value is returned. If it is a list
|
|
|
3580 of functions, those functions are called, in order,
|
|
|
3581 with the given arguments ARGS.
|
|
371
|
3582 It is best not to depend on the value return by `run-hook-with-args',
|
|
0
|
3583 as that may change.
|
|
|
3584
|
|
|
3585 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3586 not `make-local-variable'.
|
|
20
|
3587 */
|
|
|
3588 (int nargs, Lisp_Object *args))
|
|
0
|
3589 {
|
|
|
3590 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3591 }
|
|
|
3592
|
|
20
|
3593 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /*
|
|
0
|
3594 Run HOOK with the specified arguments ARGS.
|
|
|
3595 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3596 be a list of functions. We call those functions, one by one,
|
|
|
3597 passing arguments ARGS to each of them, until one of them
|
|
|
3598 returns a non-nil value. Then we return that value.
|
|
|
3599 If all the functions return nil, we return nil.
|
|
|
3600
|
|
|
3601 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3602 not `make-local-variable'.
|
|
20
|
3603 */
|
|
|
3604 (int nargs, Lisp_Object *args))
|
|
0
|
3605 {
|
|
|
3606 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS);
|
|
|
3607 }
|
|
|
3608
|
|
20
|
3609 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /*
|
|
0
|
3610 Run HOOK with the specified arguments ARGS.
|
|
|
3611 HOOK should be a symbol, a hook variable. Its value should
|
|
|
3612 be a list of functions. We call those functions, one by one,
|
|
|
3613 passing arguments ARGS to each of them, until one of them
|
|
|
3614 returns nil. Then we return nil.
|
|
|
3615 If all the functions return non-nil, we return non-nil.
|
|
|
3616
|
|
|
3617 To make a hook variable buffer-local, use `make-local-hook',
|
|
|
3618 not `make-local-variable'.
|
|
20
|
3619 */
|
|
|
3620 (int nargs, Lisp_Object *args))
|
|
0
|
3621 {
|
|
|
3622 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE);
|
|
|
3623 }
|
|
|
3624
|
|
|
3625 /* ARGS[0] should be a hook symbol.
|
|
|
3626 Call each of the functions in the hook value, passing each of them
|
|
|
3627 as arguments all the rest of ARGS (all NARGS - 1 elements).
|
|
|
3628 COND specifies a condition to test after each call
|
|
|
3629 to decide whether to stop.
|
|
|
3630 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3631 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3632
|
|
|
3633 Lisp_Object
|
|
|
3634 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args,
|
|
|
3635 enum run_hooks_condition cond)
|
|
|
3636 {
|
|
|
3637 Lisp_Object sym, val, ret;
|
|
|
3638
|
|
|
3639 if (!initialized || preparing_for_armageddon)
|
|
|
3640 /* We need to bail out of here pronto. */
|
|
|
3641 return Qnil;
|
|
|
3642
|
|
|
3643 /* Whenever gc_in_progress is true, preparing_for_armageddon
|
|
|
3644 will also be true unless something is really hosed. */
|
|
|
3645 assert (!gc_in_progress);
|
|
|
3646
|
|
|
3647 sym = args[0];
|
|
|
3648 val = symbol_value_in_buffer (sym, make_buffer (buf));
|
|
|
3649 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil);
|
|
|
3650
|
|
|
3651 if (UNBOUNDP (val) || NILP (val))
|
|
|
3652 return ret;
|
|
|
3653 else if (!CONSP (val) || EQ (XCAR (val), Qlambda))
|
|
|
3654 {
|
|
|
3655 args[0] = val;
|
|
|
3656 return Ffuncall (nargs, args);
|
|
|
3657 }
|
|
|
3658 else
|
|
|
3659 {
|
|
398
|
3660 struct gcpro gcpro1, gcpro2, gcpro3;
|
|
|
3661 Lisp_Object globals = Qnil;
|
|
|
3662 GCPRO3 (sym, val, globals);
|
|
0
|
3663
|
|
|
3664 for (;
|
|
|
3665 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3666 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret)
|
|
|
3667 : !NILP (ret)));
|
|
|
3668 val = XCDR (val))
|
|
|
3669 {
|
|
|
3670 if (EQ (XCAR (val), Qt))
|
|
|
3671 {
|
|
|
3672 /* t indicates this hook has a local binding;
|
|
|
3673 it means to run the global binding too. */
|
|
398
|
3674 globals = Fdefault_value (sym);
|
|
298
|
3675
|
|
|
3676 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) &&
|
|
|
3677 ! NILP (globals))
|
|
|
3678 {
|
|
|
3679 args[0] = globals;
|
|
|
3680 ret = Ffuncall (nargs, args);
|
|
|
3681 }
|
|
|
3682 else
|
|
0
|
3683 {
|
|
298
|
3684 for (;
|
|
|
3685 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION)
|
|
|
3686 || (cond == RUN_HOOKS_UNTIL_SUCCESS
|
|
|
3687 ? NILP (ret)
|
|
|
3688 : !NILP (ret)));
|
|
|
3689 globals = XCDR (globals))
|
|
|
3690 {
|
|
|
3691 args[0] = XCAR (globals);
|
|
|
3692 /* In a global value, t should not occur. If it does, we
|
|
|
3693 must ignore it to avoid an endless loop. */
|
|
|
3694 if (!EQ (args[0], Qt))
|
|
|
3695 ret = Ffuncall (nargs, args);
|
|
|
3696 }
|
|
0
|
3697 }
|
|
|
3698 }
|
|
|
3699 else
|
|
|
3700 {
|
|
|
3701 args[0] = XCAR (val);
|
|
|
3702 ret = Ffuncall (nargs, args);
|
|
|
3703 }
|
|
|
3704 }
|
|
|
3705
|
|
|
3706 UNGCPRO;
|
|
|
3707 return ret;
|
|
|
3708 }
|
|
|
3709 }
|
|
|
3710
|
|
|
3711 Lisp_Object
|
|
|
3712 run_hook_with_args (int nargs, Lisp_Object *args,
|
|
|
3713 enum run_hooks_condition cond)
|
|
|
3714 {
|
|
|
3715 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond);
|
|
|
3716 }
|
|
|
3717
|
|
|
3718 #if 0
|
|
|
3719
|
|
|
3720 /* From FSF 19.30, not currently used */
|
|
|
3721
|
|
|
3722 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
|
|
|
3723 present value of that symbol.
|
|
|
3724 Call each element of FUNLIST,
|
|
|
3725 passing each of them the rest of ARGS.
|
|
|
3726 The caller (or its caller, etc) must gcpro all of ARGS,
|
|
|
3727 except that it isn't necessary to gcpro ARGS[0]. */
|
|
|
3728
|
|
|
3729 Lisp_Object
|
|
|
3730 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args)
|
|
|
3731 {
|
|
380
|
3732 Lisp_Object sym = args[0];
|
|
0
|
3733 Lisp_Object val;
|
|
|
3734 struct gcpro gcpro1, gcpro2;
|
|
|
3735
|
|
|
3736 GCPRO2 (sym, val);
|
|
|
3737
|
|
|
3738 for (val = funlist; CONSP (val); val = XCDR (val))
|
|
|
3739 {
|
|
|
3740 if (EQ (XCAR (val), Qt))
|
|
|
3741 {
|
|
|
3742 /* t indicates this hook has a local binding;
|
|
|
3743 it means to run the global binding too. */
|
|
|
3744 Lisp_Object globals;
|
|
|
3745
|
|
|
3746 for (globals = Fdefault_value (sym);
|
|
|
3747 CONSP (globals);
|
|
|
3748 globals = XCDR (globals))
|
|
|
3749 {
|
|
|
3750 args[0] = XCAR (globals);
|
|
|
3751 /* In a global value, t should not occur. If it does, we
|
|
|
3752 must ignore it to avoid an endless loop. */
|
|
|
3753 if (!EQ (args[0], Qt))
|
|
|
3754 Ffuncall (nargs, args);
|
|
|
3755 }
|
|
|
3756 }
|
|
|
3757 else
|
|
|
3758 {
|
|
|
3759 args[0] = XCAR (val);
|
|
|
3760 Ffuncall (nargs, args);
|
|
|
3761 }
|
|
|
3762 }
|
|
|
3763 UNGCPRO;
|
|
|
3764 return Qnil;
|
|
|
3765 }
|
|
|
3766
|
|
|
3767 #endif /* 0 */
|
|
|
3768
|
|
|
3769 void
|
|
|
3770 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...)
|
|
|
3771 {
|
|
|
3772 /* This function can GC */
|
|
|
3773 struct gcpro gcpro1;
|
|
|
3774 int i;
|
|
|
3775 va_list vargs;
|
|
185
|
3776 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3777
|
|
|
3778 va_start (vargs, nargs);
|
|
|
3779 funcall_args[0] = hook_var;
|
|
|
3780 for (i = 0; i < nargs; i++)
|
|
|
3781 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3782 va_end (vargs);
|
|
|
3783
|
|
|
3784 GCPRO1 (*funcall_args);
|
|
|
3785 gcpro1.nvars = nargs + 1;
|
|
|
3786 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION);
|
|
|
3787 UNGCPRO;
|
|
|
3788 }
|
|
|
3789
|
|
|
3790 void
|
|
|
3791 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var,
|
|
|
3792 int nargs, ...)
|
|
|
3793 {
|
|
|
3794 /* This function can GC */
|
|
|
3795 struct gcpro gcpro1;
|
|
|
3796 int i;
|
|
|
3797 va_list vargs;
|
|
185
|
3798 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs);
|
|
0
|
3799
|
|
|
3800 va_start (vargs, nargs);
|
|
|
3801 funcall_args[0] = hook_var;
|
|
|
3802 for (i = 0; i < nargs; i++)
|
|
|
3803 funcall_args[i + 1] = va_arg (vargs, Lisp_Object);
|
|
|
3804 va_end (vargs);
|
|
|
3805
|
|
|
3806 GCPRO1 (*funcall_args);
|
|
|
3807 gcpro1.nvars = nargs + 1;
|
|
|
3808 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args,
|
|
|
3809 RUN_HOOKS_TO_COMPLETION);
|
|
|
3810 UNGCPRO;
|
|
|
3811 }
|
|
|
3812
|
|
|
3813 Lisp_Object
|
|
|
3814 run_hook (Lisp_Object hook)
|
|
|
3815 {
|
|
|
3816 Frun_hooks (1, &hook);
|
|
|
3817 return Qnil;
|
|
|
3818 }
|
|
|
3819
|
|
|
3820
|
|
380
|
3821 /************************************************************************/
|
|
|
3822 /* Front-ends to eval, funcall, apply */
|
|
|
3823 /************************************************************************/
|
|
0
|
3824
|
|
|
3825 /* Apply fn to arg */
|
|
|
3826 Lisp_Object
|
|
|
3827 apply1 (Lisp_Object fn, Lisp_Object arg)
|
|
|
3828 {
|
|
|
3829 /* This function can GC */
|
|
|
3830 struct gcpro gcpro1;
|
|
|
3831 Lisp_Object args[2];
|
|
|
3832
|
|
|
3833 if (NILP (arg))
|
|
173
|
3834 return Ffuncall (1, &fn);
|
|
0
|
3835 GCPRO1 (args[0]);
|
|
|
3836 gcpro1.nvars = 2;
|
|
|
3837 args[0] = fn;
|
|
|
3838 args[1] = arg;
|
|
|
3839 RETURN_UNGCPRO (Fapply (2, args));
|
|
|
3840 }
|
|
|
3841
|
|
|
3842 /* Call function fn on no arguments */
|
|
|
3843 Lisp_Object
|
|
|
3844 call0 (Lisp_Object fn)
|
|
|
3845 {
|
|
|
3846 /* This function can GC */
|
|
|
3847 struct gcpro gcpro1;
|
|
|
3848
|
|
|
3849 GCPRO1 (fn);
|
|
|
3850 RETURN_UNGCPRO (Ffuncall (1, &fn));
|
|
|
3851 }
|
|
|
3852
|
|
|
3853 /* Call function fn with argument arg0 */
|
|
|
3854 Lisp_Object
|
|
|
3855 call1 (Lisp_Object fn,
|
|
|
3856 Lisp_Object arg0)
|
|
|
3857 {
|
|
|
3858 /* This function can GC */
|
|
|
3859 struct gcpro gcpro1;
|
|
185
|
3860 Lisp_Object args[2];
|
|
0
|
3861 args[0] = fn;
|
|
|
3862 args[1] = arg0;
|
|
|
3863 GCPRO1 (args[0]);
|
|
|
3864 gcpro1.nvars = 2;
|
|
|
3865 RETURN_UNGCPRO (Ffuncall (2, args));
|
|
|
3866 }
|
|
|
3867
|
|
|
3868 /* Call function fn with arguments arg0, arg1 */
|
|
|
3869 Lisp_Object
|
|
|
3870 call2 (Lisp_Object fn,
|
|
|
3871 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
3872 {
|
|
|
3873 /* This function can GC */
|
|
|
3874 struct gcpro gcpro1;
|
|
|
3875 Lisp_Object args[3];
|
|
|
3876 args[0] = fn;
|
|
|
3877 args[1] = arg0;
|
|
|
3878 args[2] = arg1;
|
|
|
3879 GCPRO1 (args[0]);
|
|
|
3880 gcpro1.nvars = 3;
|
|
|
3881 RETURN_UNGCPRO (Ffuncall (3, args));
|
|
|
3882 }
|
|
|
3883
|
|
|
3884 /* Call function fn with arguments arg0, arg1, arg2 */
|
|
|
3885 Lisp_Object
|
|
|
3886 call3 (Lisp_Object fn,
|
|
|
3887 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
3888 {
|
|
|
3889 /* This function can GC */
|
|
|
3890 struct gcpro gcpro1;
|
|
|
3891 Lisp_Object args[4];
|
|
|
3892 args[0] = fn;
|
|
|
3893 args[1] = arg0;
|
|
|
3894 args[2] = arg1;
|
|
|
3895 args[3] = arg2;
|
|
|
3896 GCPRO1 (args[0]);
|
|
|
3897 gcpro1.nvars = 4;
|
|
|
3898 RETURN_UNGCPRO (Ffuncall (4, args));
|
|
|
3899 }
|
|
|
3900
|
|
|
3901 /* Call function fn with arguments arg0, arg1, arg2, arg3 */
|
|
|
3902 Lisp_Object
|
|
|
3903 call4 (Lisp_Object fn,
|
|
|
3904 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
3905 Lisp_Object arg3)
|
|
|
3906 {
|
|
|
3907 /* This function can GC */
|
|
|
3908 struct gcpro gcpro1;
|
|
|
3909 Lisp_Object args[5];
|
|
|
3910 args[0] = fn;
|
|
|
3911 args[1] = arg0;
|
|
|
3912 args[2] = arg1;
|
|
|
3913 args[3] = arg2;
|
|
|
3914 args[4] = arg3;
|
|
|
3915 GCPRO1 (args[0]);
|
|
|
3916 gcpro1.nvars = 5;
|
|
|
3917 RETURN_UNGCPRO (Ffuncall (5, args));
|
|
|
3918 }
|
|
|
3919
|
|
|
3920 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */
|
|
|
3921 Lisp_Object
|
|
|
3922 call5 (Lisp_Object fn,
|
|
185
|
3923 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3924 Lisp_Object arg3, Lisp_Object arg4)
|
|
|
3925 {
|
|
|
3926 /* This function can GC */
|
|
|
3927 struct gcpro gcpro1;
|
|
|
3928 Lisp_Object args[6];
|
|
|
3929 args[0] = fn;
|
|
|
3930 args[1] = arg0;
|
|
|
3931 args[2] = arg1;
|
|
|
3932 args[3] = arg2;
|
|
|
3933 args[4] = arg3;
|
|
|
3934 args[5] = arg4;
|
|
|
3935 GCPRO1 (args[0]);
|
|
|
3936 gcpro1.nvars = 6;
|
|
|
3937 RETURN_UNGCPRO (Ffuncall (6, args));
|
|
|
3938 }
|
|
|
3939
|
|
|
3940 Lisp_Object
|
|
|
3941 call6 (Lisp_Object fn,
|
|
185
|
3942 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3943 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5)
|
|
|
3944 {
|
|
|
3945 /* This function can GC */
|
|
|
3946 struct gcpro gcpro1;
|
|
|
3947 Lisp_Object args[7];
|
|
|
3948 args[0] = fn;
|
|
|
3949 args[1] = arg0;
|
|
|
3950 args[2] = arg1;
|
|
|
3951 args[3] = arg2;
|
|
|
3952 args[4] = arg3;
|
|
|
3953 args[5] = arg4;
|
|
|
3954 args[6] = arg5;
|
|
|
3955 GCPRO1 (args[0]);
|
|
|
3956 gcpro1.nvars = 7;
|
|
|
3957 RETURN_UNGCPRO (Ffuncall (7, args));
|
|
|
3958 }
|
|
|
3959
|
|
|
3960 Lisp_Object
|
|
|
3961 call7 (Lisp_Object fn,
|
|
185
|
3962 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3963 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3964 Lisp_Object arg6)
|
|
|
3965 {
|
|
|
3966 /* This function can GC */
|
|
|
3967 struct gcpro gcpro1;
|
|
|
3968 Lisp_Object args[8];
|
|
|
3969 args[0] = fn;
|
|
|
3970 args[1] = arg0;
|
|
|
3971 args[2] = arg1;
|
|
|
3972 args[3] = arg2;
|
|
|
3973 args[4] = arg3;
|
|
|
3974 args[5] = arg4;
|
|
|
3975 args[6] = arg5;
|
|
|
3976 args[7] = arg6;
|
|
|
3977 GCPRO1 (args[0]);
|
|
|
3978 gcpro1.nvars = 8;
|
|
|
3979 RETURN_UNGCPRO (Ffuncall (8, args));
|
|
|
3980 }
|
|
|
3981
|
|
|
3982 Lisp_Object
|
|
|
3983 call8 (Lisp_Object fn,
|
|
185
|
3984 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
0
|
3985 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5,
|
|
|
3986 Lisp_Object arg6, Lisp_Object arg7)
|
|
|
3987 {
|
|
|
3988 /* This function can GC */
|
|
|
3989 struct gcpro gcpro1;
|
|
|
3990 Lisp_Object args[9];
|
|
|
3991 args[0] = fn;
|
|
|
3992 args[1] = arg0;
|
|
|
3993 args[2] = arg1;
|
|
|
3994 args[3] = arg2;
|
|
|
3995 args[4] = arg3;
|
|
|
3996 args[5] = arg4;
|
|
|
3997 args[6] = arg5;
|
|
|
3998 args[7] = arg6;
|
|
|
3999 args[8] = arg7;
|
|
|
4000 GCPRO1 (args[0]);
|
|
|
4001 gcpro1.nvars = 9;
|
|
|
4002 RETURN_UNGCPRO (Ffuncall (9, args));
|
|
|
4003 }
|
|
|
4004
|
|
|
4005 Lisp_Object
|
|
|
4006 call0_in_buffer (struct buffer *buf, Lisp_Object fn)
|
|
|
4007 {
|
|
272
|
4008 if (current_buffer == buf)
|
|
|
4009 return call0 (fn);
|
|
|
4010 else
|
|
0
|
4011 {
|
|
272
|
4012 Lisp_Object val;
|
|
380
|
4013 int speccount = specpdl_depth();
|
|
0
|
4014 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4015 set_buffer_internal (buf);
|
|
272
|
4016 val = call0 (fn);
|
|
|
4017 unbind_to (speccount, Qnil);
|
|
|
4018 return val;
|
|
0
|
4019 }
|
|
|
4020 }
|
|
|
4021
|
|
|
4022 Lisp_Object
|
|
|
4023 call1_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4024 Lisp_Object arg0)
|
|
|
4025 {
|
|
272
|
4026 if (current_buffer == buf)
|
|
|
4027 return call1 (fn, arg0);
|
|
|
4028 else
|
|
0
|
4029 {
|
|
272
|
4030 Lisp_Object val;
|
|
380
|
4031 int speccount = specpdl_depth();
|
|
0
|
4032 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4033 set_buffer_internal (buf);
|
|
272
|
4034 val = call1 (fn, arg0);
|
|
|
4035 unbind_to (speccount, Qnil);
|
|
|
4036 return val;
|
|
0
|
4037 }
|
|
|
4038 }
|
|
|
4039
|
|
|
4040 Lisp_Object
|
|
|
4041 call2_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4042 Lisp_Object arg0, Lisp_Object arg1)
|
|
|
4043 {
|
|
272
|
4044 if (current_buffer == buf)
|
|
|
4045 return call2 (fn, arg0, arg1);
|
|
|
4046 else
|
|
0
|
4047 {
|
|
272
|
4048 Lisp_Object val;
|
|
380
|
4049 int speccount = specpdl_depth();
|
|
0
|
4050 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4051 set_buffer_internal (buf);
|
|
272
|
4052 val = call2 (fn, arg0, arg1);
|
|
|
4053 unbind_to (speccount, Qnil);
|
|
|
4054 return val;
|
|
0
|
4055 }
|
|
|
4056 }
|
|
|
4057
|
|
|
4058 Lisp_Object
|
|
|
4059 call3_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4060 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2)
|
|
|
4061 {
|
|
272
|
4062 if (current_buffer == buf)
|
|
|
4063 return call3 (fn, arg0, arg1, arg2);
|
|
|
4064 else
|
|
0
|
4065 {
|
|
272
|
4066 Lisp_Object val;
|
|
380
|
4067 int speccount = specpdl_depth();
|
|
0
|
4068 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4069 set_buffer_internal (buf);
|
|
272
|
4070 val = call3 (fn, arg0, arg1, arg2);
|
|
|
4071 unbind_to (speccount, Qnil);
|
|
|
4072 return val;
|
|
0
|
4073 }
|
|
|
4074 }
|
|
|
4075
|
|
|
4076 Lisp_Object
|
|
|
4077 call4_in_buffer (struct buffer *buf, Lisp_Object fn,
|
|
|
4078 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2,
|
|
|
4079 Lisp_Object arg3)
|
|
|
4080 {
|
|
272
|
4081 if (current_buffer == buf)
|
|
|
4082 return call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4083 else
|
|
0
|
4084 {
|
|
272
|
4085 Lisp_Object val;
|
|
380
|
4086 int speccount = specpdl_depth();
|
|
0
|
4087 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4088 set_buffer_internal (buf);
|
|
272
|
4089 val = call4 (fn, arg0, arg1, arg2, arg3);
|
|
|
4090 unbind_to (speccount, Qnil);
|
|
|
4091 return val;
|
|
0
|
4092 }
|
|
|
4093 }
|
|
|
4094
|
|
|
4095 Lisp_Object
|
|
|
4096 eval_in_buffer (struct buffer *buf, Lisp_Object form)
|
|
|
4097 {
|
|
272
|
4098 if (current_buffer == buf)
|
|
|
4099 return Feval (form);
|
|
|
4100 else
|
|
0
|
4101 {
|
|
272
|
4102 Lisp_Object val;
|
|
380
|
4103 int speccount = specpdl_depth();
|
|
0
|
4104 record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
|
|
|
4105 set_buffer_internal (buf);
|
|
272
|
4106 val = Feval (form);
|
|
|
4107 unbind_to (speccount, Qnil);
|
|
|
4108 return val;
|
|
0
|
4109 }
|
|
|
4110 }
|
|
|
4111
|
|
|
4112
|
|
380
|
4113 /************************************************************************/
|
|
|
4114 /* Error-catching front-ends to eval, funcall, apply */
|
|
|
4115 /************************************************************************/
|
|
0
|
4116
|
|
|
4117 /* Call function fn on no arguments, with condition handler */
|
|
|
4118 Lisp_Object
|
|
|
4119 call0_with_handler (Lisp_Object handler, Lisp_Object fn)
|
|
|
4120 {
|
|
|
4121 /* This function can GC */
|
|
|
4122 struct gcpro gcpro1;
|
|
|
4123 Lisp_Object args[2];
|
|
|
4124 args[0] = handler;
|
|
|
4125 args[1] = fn;
|
|
|
4126 GCPRO1 (args[0]);
|
|
|
4127 gcpro1.nvars = 2;
|
|
|
4128 RETURN_UNGCPRO (Fcall_with_condition_handler (2, args));
|
|
|
4129 }
|
|
|
4130
|
|
|
4131 /* Call function fn with argument arg0, with condition handler */
|
|
|
4132 Lisp_Object
|
|
|
4133 call1_with_handler (Lisp_Object handler, Lisp_Object fn,
|
|
|
4134 Lisp_Object arg0)
|
|
|
4135 {
|
|
|
4136 /* This function can GC */
|
|
|
4137 struct gcpro gcpro1;
|
|
|
4138 Lisp_Object args[3];
|
|
|
4139 args[0] = handler;
|
|
|
4140 args[1] = fn;
|
|
|
4141 args[2] = arg0;
|
|
|
4142 GCPRO1 (args[0]);
|
|
|
4143 gcpro1.nvars = 3;
|
|
|
4144 RETURN_UNGCPRO (Fcall_with_condition_handler (3, args));
|
|
|
4145 }
|
|
|
4146
|
|
|
4147
|
|
|
4148 /* The following functions provide you with error-trapping versions
|
|
|
4149 of the various front-ends above. They take an additional
|
|
|
4150 "warning_string" argument; if non-zero, a warning with this
|
|
|
4151 string and the actual error that occurred will be displayed
|
|
|
4152 in the *Warnings* buffer if an error occurs. In all cases,
|
|
|
4153 QUIT is inhibited while these functions are running, and if
|
|
|
4154 an error occurs, Qunbound is returned instead of the normal
|
|
|
4155 return value.
|
|
|
4156 */
|
|
|
4157
|
|
185
|
4158 /* #### This stuff needs to catch throws as well. We need to
|
|
0
|
4159 improve internal_catch() so it can take a "catch anything"
|
|
|
4160 argument similar to Qt or Qerror for condition_case_1(). */
|
|
|
4161
|
|
|
4162 static Lisp_Object
|
|
|
4163 caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4164 {
|
|
|
4165 if (!NILP (errordata))
|
|
|
4166 {
|
|
|
4167 Lisp_Object args[2];
|
|
185
|
4168
|
|
0
|
4169 if (!NILP (arg))
|
|
|
4170 {
|
|
|
4171 char *str = (char *) get_opaque_ptr (arg);
|
|
|
4172 args[0] = build_string (str);
|
|
|
4173 }
|
|
|
4174 else
|
|
|
4175 args[0] = build_string ("error");
|
|
|
4176 /* #### This should call
|
|
|
4177 (with-output-to-string (display-error errordata))
|
|
|
4178 but that stuff is all in Lisp currently. */
|
|
|
4179 args[1] = errordata;
|
|
|
4180 warn_when_safe_lispobj
|
|
|
4181 (Qerror, Qwarning,
|
|
398
|
4182 emacs_doprnt_string_lisp ((const Bufbyte *) "%s: %s",
|
|
0
|
4183 Qnil, -1, 2, args));
|
|
|
4184 }
|
|
|
4185 return Qunbound;
|
|
|
4186 }
|
|
|
4187
|
|
|
4188 static Lisp_Object
|
|
|
4189 allow_quit_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4190 {
|
|
|
4191 if (CONSP (errordata) && EQ (XCAR (errordata), Qquit))
|
|
|
4192 return Fsignal (Qquit, XCDR (errordata));
|
|
|
4193 return caught_a_squirmer (errordata, arg);
|
|
|
4194 }
|
|
|
4195
|
|
|
4196 static Lisp_Object
|
|
|
4197 safe_run_hook_caught_a_squirmer (Lisp_Object errordata, Lisp_Object arg)
|
|
|
4198 {
|
|
|
4199 Lisp_Object hook = Fcar (arg);
|
|
|
4200 arg = Fcdr (arg);
|
|
|
4201 /* Clear out the hook. */
|
|
|
4202 Fset (hook, Qnil);
|
|
|
4203 return caught_a_squirmer (errordata, arg);
|
|
|
4204 }
|
|
|
4205
|
|
|
4206 static Lisp_Object
|
|
|
4207 allow_quit_safe_run_hook_caught_a_squirmer (Lisp_Object errordata,
|
|
|
4208 Lisp_Object arg)
|
|
|
4209 {
|
|
|
4210 Lisp_Object hook = Fcar (arg);
|
|
|
4211 arg = Fcdr (arg);
|
|
|
4212 if (!CONSP (errordata) || !EQ (XCAR (errordata), Qquit))
|
|
|
4213 /* Clear out the hook. */
|
|
|
4214 Fset (hook, Qnil);
|
|
|
4215 return allow_quit_caught_a_squirmer (errordata, arg);
|
|
|
4216 }
|
|
|
4217
|
|
|
4218 static Lisp_Object
|
|
|
4219 catch_them_squirmers_eval_in_buffer (Lisp_Object cons)
|
|
|
4220 {
|
|
|
4221 return eval_in_buffer (XBUFFER (XCAR (cons)), XCDR (cons));
|
|
|
4222 }
|
|
|
4223
|
|
|
4224 Lisp_Object
|
|
398
|
4225 eval_in_buffer_trapping_errors (const char *warning_string,
|
|
0
|
4226 struct buffer *buf, Lisp_Object form)
|
|
|
4227 {
|
|
380
|
4228 int speccount = specpdl_depth();
|
|
0
|
4229 Lisp_Object tem;
|
|
272
|
4230 Lisp_Object buffer;
|
|
0
|
4231 Lisp_Object cons;
|
|
|
4232 Lisp_Object opaque;
|
|
|
4233 struct gcpro gcpro1, gcpro2;
|
|
|
4234
|
|
|
4235 XSETBUFFER (buffer, buf);
|
|
|
4236
|
|
|
4237 specbind (Qinhibit_quit, Qt);
|
|
|
4238 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4239
|
|
|
4240 cons = noseeum_cons (buffer, form);
|
|
398
|
4241 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4242 GCPRO2 (cons, opaque);
|
|
|
4243 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4244 tem = condition_case_1 (Qerror,
|
|
|
4245 catch_them_squirmers_eval_in_buffer, cons,
|
|
|
4246 caught_a_squirmer, opaque);
|
|
|
4247 free_cons (XCONS (cons));
|
|
398
|
4248 if (OPAQUE_PTRP (opaque))
|
|
0
|
4249 free_opaque_ptr (opaque);
|
|
|
4250 UNGCPRO;
|
|
185
|
4251
|
|
0
|
4252 /* gc_currently_forbidden = 0; */
|
|
|
4253 return unbind_to (speccount, tem);
|
|
|
4254 }
|
|
|
4255
|
|
|
4256 static Lisp_Object
|
|
|
4257 catch_them_squirmers_run_hook (Lisp_Object hook_symbol)
|
|
|
4258 {
|
|
|
4259 /* This function can GC */
|
|
|
4260 run_hook (hook_symbol);
|
|
|
4261 return Qnil;
|
|
|
4262 }
|
|
|
4263
|
|
|
4264 Lisp_Object
|
|
398
|
4265 run_hook_trapping_errors (const char *warning_string, Lisp_Object hook_symbol)
|
|
0
|
4266 {
|
|
272
|
4267 int speccount;
|
|
0
|
4268 Lisp_Object tem;
|
|
|
4269 Lisp_Object opaque;
|
|
|
4270 struct gcpro gcpro1;
|
|
|
4271
|
|
|
4272 if (!initialized || preparing_for_armageddon)
|
|
|
4273 return Qnil;
|
|
|
4274 tem = find_symbol_value (hook_symbol);
|
|
|
4275 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4276 return Qnil;
|
|
|
4277
|
|
380
|
4278 speccount = specpdl_depth();
|
|
0
|
4279 specbind (Qinhibit_quit, Qt);
|
|
|
4280
|
|
398
|
4281 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4282 GCPRO1 (opaque);
|
|
|
4283 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4284 tem = condition_case_1 (Qerror,
|
|
|
4285 catch_them_squirmers_run_hook, hook_symbol,
|
|
|
4286 caught_a_squirmer, opaque);
|
|
398
|
4287 if (OPAQUE_PTRP (opaque))
|
|
0
|
4288 free_opaque_ptr (opaque);
|
|
|
4289 UNGCPRO;
|
|
|
4290
|
|
|
4291 return unbind_to (speccount, tem);
|
|
|
4292 }
|
|
|
4293
|
|
|
4294 /* Same as run_hook_trapping_errors() but also set the hook to nil
|
|
|
4295 if an error occurs. */
|
|
|
4296
|
|
|
4297 Lisp_Object
|
|
398
|
4298 safe_run_hook_trapping_errors (const char *warning_string,
|
|
0
|
4299 Lisp_Object hook_symbol,
|
|
|
4300 int allow_quit)
|
|
|
4301 {
|
|
380
|
4302 int speccount = specpdl_depth();
|
|
0
|
4303 Lisp_Object tem;
|
|
|
4304 Lisp_Object cons = Qnil;
|
|
|
4305 struct gcpro gcpro1;
|
|
|
4306
|
|
|
4307 if (!initialized || preparing_for_armageddon)
|
|
|
4308 return Qnil;
|
|
|
4309 tem = find_symbol_value (hook_symbol);
|
|
|
4310 if (NILP (tem) || UNBOUNDP (tem))
|
|
|
4311 return Qnil;
|
|
|
4312
|
|
|
4313 if (!allow_quit)
|
|
|
4314 specbind (Qinhibit_quit, Qt);
|
|
|
4315
|
|
185
|
4316 cons = noseeum_cons (hook_symbol,
|
|
398
|
4317 warning_string ? make_opaque_ptr ((void *)warning_string)
|
|
0
|
4318 : Qnil);
|
|
|
4319 GCPRO1 (cons);
|
|
|
4320 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4321 tem = condition_case_1 (Qerror,
|
|
|
4322 catch_them_squirmers_run_hook,
|
|
|
4323 hook_symbol,
|
|
|
4324 allow_quit ?
|
|
|
4325 allow_quit_safe_run_hook_caught_a_squirmer :
|
|
|
4326 safe_run_hook_caught_a_squirmer,
|
|
|
4327 cons);
|
|
398
|
4328 if (OPAQUE_PTRP (XCDR (cons)))
|
|
0
|
4329 free_opaque_ptr (XCDR (cons));
|
|
|
4330 free_cons (XCONS (cons));
|
|
|
4331 UNGCPRO;
|
|
|
4332
|
|
|
4333 return unbind_to (speccount, tem);
|
|
|
4334 }
|
|
|
4335
|
|
|
4336 static Lisp_Object
|
|
|
4337 catch_them_squirmers_call0 (Lisp_Object function)
|
|
|
4338 {
|
|
|
4339 /* This function can GC */
|
|
|
4340 return call0 (function);
|
|
|
4341 }
|
|
|
4342
|
|
|
4343 Lisp_Object
|
|
398
|
4344 call0_trapping_errors (const char *warning_string, Lisp_Object function)
|
|
0
|
4345 {
|
|
272
|
4346 int speccount;
|
|
0
|
4347 Lisp_Object tem;
|
|
|
4348 Lisp_Object opaque = Qnil;
|
|
|
4349 struct gcpro gcpro1, gcpro2;
|
|
|
4350
|
|
|
4351 if (SYMBOLP (function))
|
|
|
4352 {
|
|
|
4353 tem = XSYMBOL (function)->function;
|
|
|
4354 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4355 return Qnil;
|
|
0
|
4356 }
|
|
|
4357
|
|
|
4358 GCPRO2 (opaque, function);
|
|
380
|
4359 speccount = specpdl_depth();
|
|
0
|
4360 specbind (Qinhibit_quit, Qt);
|
|
|
4361 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4362
|
|
398
|
4363 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4364 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4365 tem = condition_case_1 (Qerror,
|
|
|
4366 catch_them_squirmers_call0, function,
|
|
|
4367 caught_a_squirmer, opaque);
|
|
398
|
4368 if (OPAQUE_PTRP (opaque))
|
|
0
|
4369 free_opaque_ptr (opaque);
|
|
|
4370 UNGCPRO;
|
|
|
4371
|
|
|
4372 /* gc_currently_forbidden = 0; */
|
|
|
4373 return unbind_to (speccount, tem);
|
|
|
4374 }
|
|
|
4375
|
|
|
4376 static Lisp_Object
|
|
|
4377 catch_them_squirmers_call1 (Lisp_Object cons)
|
|
|
4378 {
|
|
|
4379 /* This function can GC */
|
|
|
4380 return call1 (XCAR (cons), XCDR (cons));
|
|
|
4381 }
|
|
|
4382
|
|
|
4383 static Lisp_Object
|
|
|
4384 catch_them_squirmers_call2 (Lisp_Object cons)
|
|
|
4385 {
|
|
|
4386 /* This function can GC */
|
|
|
4387 return call2 (XCAR (cons), XCAR (XCDR (cons)), XCAR (XCDR (XCDR (cons))));
|
|
|
4388 }
|
|
|
4389
|
|
|
4390 Lisp_Object
|
|
398
|
4391 call1_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
0
|
4392 Lisp_Object object)
|
|
|
4393 {
|
|
380
|
4394 int speccount = specpdl_depth();
|
|
0
|
4395 Lisp_Object tem;
|
|
|
4396 Lisp_Object cons = Qnil;
|
|
|
4397 Lisp_Object opaque = Qnil;
|
|
|
4398 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
|
|
|
4399
|
|
|
4400 if (SYMBOLP (function))
|
|
|
4401 {
|
|
|
4402 tem = XSYMBOL (function)->function;
|
|
|
4403 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4404 return Qnil;
|
|
0
|
4405 }
|
|
|
4406
|
|
|
4407 GCPRO4 (cons, opaque, function, object);
|
|
|
4408
|
|
|
4409 specbind (Qinhibit_quit, Qt);
|
|
|
4410 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4411
|
|
|
4412 cons = noseeum_cons (function, object);
|
|
398
|
4413 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4414 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4415 tem = condition_case_1 (Qerror,
|
|
|
4416 catch_them_squirmers_call1, cons,
|
|
|
4417 caught_a_squirmer, opaque);
|
|
398
|
4418 if (OPAQUE_PTRP (opaque))
|
|
0
|
4419 free_opaque_ptr (opaque);
|
|
|
4420 free_cons (XCONS (cons));
|
|
|
4421 UNGCPRO;
|
|
185
|
4422
|
|
0
|
4423 /* gc_currently_forbidden = 0; */
|
|
|
4424 return unbind_to (speccount, tem);
|
|
|
4425 }
|
|
|
4426
|
|
|
4427 Lisp_Object
|
|
398
|
4428 call2_trapping_errors (const char *warning_string, Lisp_Object function,
|
|
0
|
4429 Lisp_Object object1, Lisp_Object object2)
|
|
|
4430 {
|
|
380
|
4431 int speccount = specpdl_depth();
|
|
0
|
4432 Lisp_Object tem;
|
|
|
4433 Lisp_Object cons = Qnil;
|
|
|
4434 Lisp_Object opaque = Qnil;
|
|
|
4435 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
|
|
|
4436
|
|
|
4437 if (SYMBOLP (function))
|
|
|
4438 {
|
|
|
4439 tem = XSYMBOL (function)->function;
|
|
|
4440 if (NILP (tem) || UNBOUNDP (tem))
|
|
173
|
4441 return Qnil;
|
|
0
|
4442 }
|
|
|
4443
|
|
|
4444 GCPRO5 (cons, opaque, function, object1, object2);
|
|
|
4445 specbind (Qinhibit_quit, Qt);
|
|
|
4446 /* gc_currently_forbidden = 1; Currently no reason to do this; */
|
|
|
4447
|
|
|
4448 cons = list3 (function, object1, object2);
|
|
398
|
4449 opaque = (warning_string ? make_opaque_ptr ((void *)warning_string) : Qnil);
|
|
0
|
4450 /* Qerror not Qt, so you can get a backtrace */
|
|
|
4451 tem = condition_case_1 (Qerror,
|
|
|
4452 catch_them_squirmers_call2, cons,
|
|
|
4453 caught_a_squirmer, opaque);
|
|
398
|
4454 if (OPAQUE_PTRP (opaque))
|
|
0
|
4455 free_opaque_ptr (opaque);
|
|
|
4456 free_list (cons);
|
|
|
4457 UNGCPRO;
|
|
|
4458
|
|
|
4459 /* gc_currently_forbidden = 0; */
|
|
|
4460 return unbind_to (speccount, tem);
|
|
|
4461 }
|
|
|
4462
|
|
|
4463
|
|
380
|
4464 /************************************************************************/
|
|
|
4465 /* The special binding stack */
|
|
|
4466 /* Most C code should simply use specbind() and unbind_to(). */
|
|
|
4467 /* When performance is critical, use the macros in backtrace.h. */
|
|
|
4468 /************************************************************************/
|
|
0
|
4469
|
|
2
|
4470 #define min_max_specpdl_size 400
|
|
|
4471
|
|
380
|
4472 void
|
|
|
4473 grow_specpdl (size_t reserved)
|
|
0
|
4474 {
|
|
380
|
4475 size_t size_needed = specpdl_depth() + reserved;
|
|
|
4476 if (size_needed >= max_specpdl_size)
|
|
0
|
4477 {
|
|
2
|
4478 if (max_specpdl_size < min_max_specpdl_size)
|
|
|
4479 max_specpdl_size = min_max_specpdl_size;
|
|
380
|
4480 if (size_needed >= max_specpdl_size)
|
|
0
|
4481 {
|
|
380
|
4482 if (!NILP (Vdebug_on_error) ||
|
|
|
4483 !NILP (Vdebug_on_signal))
|
|
0
|
4484 /* Leave room for some specpdl in the debugger. */
|
|
380
|
4485 max_specpdl_size = size_needed + 100;
|
|
0
|
4486 continuable_error
|
|
|
4487 ("Variable binding depth exceeds max-specpdl-size");
|
|
|
4488 }
|
|
|
4489 }
|
|
380
|
4490 while (specpdl_size < size_needed)
|
|
|
4491 {
|
|
|
4492 specpdl_size *= 2;
|
|
|
4493 if (specpdl_size > max_specpdl_size)
|
|
|
4494 specpdl_size = max_specpdl_size;
|
|
|
4495 }
|
|
185
|
4496 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size);
|
|
380
|
4497 specpdl_ptr = specpdl + specpdl_depth();
|
|
0
|
4498 }
|
|
|
4499
|
|
|
4500
|
|
|
4501 /* Handle unbinding buffer-local variables */
|
|
|
4502 static Lisp_Object
|
|
|
4503 specbind_unwind_local (Lisp_Object ovalue)
|
|
|
4504 {
|
|
|
4505 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4506 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
398
|
4507 Lisp_Cons *victim = XCONS (ovalue);
|
|
0
|
4508 Lisp_Object buf = get_buffer (victim->car, 0);
|
|
|
4509 ovalue = victim->cdr;
|
|
|
4510
|
|
|
4511 free_cons (victim);
|
|
|
4512
|
|
|
4513 if (NILP (buf))
|
|
|
4514 {
|
|
|
4515 /* Deleted buffer -- do nothing */
|
|
|
4516 }
|
|
|
4517 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0)
|
|
|
4518 {
|
|
|
4519 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4520 * (kill-local-variable can do this.)
|
|
|
4521 * Do nothing in this case.
|
|
|
4522 */
|
|
|
4523 }
|
|
|
4524 else if (EQ (buf, current))
|
|
|
4525 Fset (symbol, ovalue);
|
|
|
4526 else
|
|
|
4527 {
|
|
|
4528 /* Urk! Somebody switched buffers */
|
|
|
4529 struct gcpro gcpro1;
|
|
|
4530 GCPRO1 (current);
|
|
|
4531 Fset_buffer (buf);
|
|
|
4532 Fset (symbol, ovalue);
|
|
|
4533 Fset_buffer (current);
|
|
|
4534 UNGCPRO;
|
|
|
4535 }
|
|
173
|
4536 return symbol;
|
|
0
|
4537 }
|
|
|
4538
|
|
|
4539 static Lisp_Object
|
|
|
4540 specbind_unwind_wasnt_local (Lisp_Object buffer)
|
|
|
4541 {
|
|
|
4542 Lisp_Object current = Fcurrent_buffer ();
|
|
|
4543 Lisp_Object symbol = specpdl_ptr->symbol;
|
|
|
4544
|
|
|
4545 buffer = get_buffer (buffer, 0);
|
|
|
4546 if (NILP (buffer))
|
|
|
4547 {
|
|
|
4548 /* Deleted buffer -- do nothing */
|
|
|
4549 }
|
|
|
4550 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0)
|
|
|
4551 {
|
|
|
4552 /* Was buffer-local when binding was made, now no longer is.
|
|
|
4553 * (kill-local-variable can do this.)
|
|
|
4554 * Do nothing in this case.
|
|
|
4555 */
|
|
|
4556 }
|
|
|
4557 else if (EQ (buffer, current))
|
|
|
4558 Fkill_local_variable (symbol);
|
|
|
4559 else
|
|
|
4560 {
|
|
|
4561 /* Urk! Somebody switched buffers */
|
|
|
4562 struct gcpro gcpro1;
|
|
|
4563 GCPRO1 (current);
|
|
|
4564 Fset_buffer (buffer);
|
|
|
4565 Fkill_local_variable (symbol);
|
|
|
4566 Fset_buffer (current);
|
|
|
4567 UNGCPRO;
|
|
|
4568 }
|
|
173
|
4569 return symbol;
|
|
0
|
4570 }
|
|
|
4571
|
|
|
4572
|
|
|
4573 void
|
|
|
4574 specbind (Lisp_Object symbol, Lisp_Object value)
|
|
|
4575 {
|
|
380
|
4576 SPECBIND (symbol, value);
|
|
|
4577 }
|
|
|
4578
|
|
|
4579 void
|
|
|
4580 specbind_magic (Lisp_Object symbol, Lisp_Object value)
|
|
|
4581 {
|
|
|
4582 int buffer_local =
|
|
|
4583 symbol_value_buffer_local_info (symbol, current_buffer);
|
|
|
4584
|
|
0
|
4585 if (buffer_local == 0)
|
|
|
4586 {
|
|
|
4587 specpdl_ptr->old_value = find_symbol_value (symbol);
|
|
|
4588 specpdl_ptr->func = 0; /* Handled specially by unbind_to */
|
|
|
4589 }
|
|
|
4590 else if (buffer_local > 0)
|
|
|
4591 {
|
|
|
4592 /* Already buffer-local */
|
|
|
4593 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (),
|
|
|
4594 find_symbol_value (symbol));
|
|
|
4595 specpdl_ptr->func = specbind_unwind_local;
|
|
|
4596 }
|
|
|
4597 else
|
|
|
4598 {
|
|
|
4599 /* About to become buffer-local */
|
|
|
4600 specpdl_ptr->old_value = Fcurrent_buffer ();
|
|
|
4601 specpdl_ptr->func = specbind_unwind_wasnt_local;
|
|
|
4602 }
|
|
185
|
4603
|
|
0
|
4604 specpdl_ptr->symbol = symbol;
|
|
|
4605 specpdl_ptr++;
|
|
|
4606 specpdl_depth_counter++;
|
|
|
4607
|
|
|
4608 Fset (symbol, value);
|
|
|
4609 }
|
|
|
4610
|
|
|
4611 void
|
|
|
4612 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg),
|
|
|
4613 Lisp_Object arg)
|
|
|
4614 {
|
|
380
|
4615 SPECPDL_RESERVE (1);
|
|
0
|
4616 specpdl_ptr->func = function;
|
|
|
4617 specpdl_ptr->symbol = Qnil;
|
|
|
4618 specpdl_ptr->old_value = arg;
|
|
|
4619 specpdl_ptr++;
|
|
|
4620 specpdl_depth_counter++;
|
|
|
4621 }
|
|
|
4622
|
|
|
4623 extern int check_sigio (void);
|
|
|
4624
|
|
380
|
4625 /* Unwind the stack till specpdl_depth() == COUNT.
|
|
|
4626 VALUE is not used, except that, purely as a convenience to the
|
|
|
4627 caller, it is protected from garbage-protection. */
|
|
0
|
4628 Lisp_Object
|
|
|
4629 unbind_to (int count, Lisp_Object value)
|
|
|
4630 {
|
|
380
|
4631 UNBIND_TO_GCPRO (count, value);
|
|
|
4632 return value;
|
|
|
4633 }
|
|
|
4634
|
|
|
4635 /* Don't call this directly.
|
|
|
4636 Only for use by UNBIND_TO* macros in backtrace.h */
|
|
|
4637 void
|
|
|
4638 unbind_to_hairy (int count)
|
|
|
4639 {
|
|
0
|
4640 int quitf;
|
|
|
4641
|
|
406
|
4642 ++specpdl_ptr;
|
|
|
4643 ++specpdl_depth_counter;
|
|
|
4644
|
|
0
|
4645 check_quit (); /* make Vquit_flag accurate */
|
|
|
4646 quitf = !NILP (Vquit_flag);
|
|
|
4647 Vquit_flag = Qnil;
|
|
|
4648
|
|
|
4649 while (specpdl_depth_counter != count)
|
|
|
4650 {
|
|
|
4651 --specpdl_ptr;
|
|
|
4652 --specpdl_depth_counter;
|
|
|
4653
|
|
|
4654 if (specpdl_ptr->func != 0)
|
|
|
4655 /* An unwind-protect */
|
|
380
|
4656 (*specpdl_ptr->func) (specpdl_ptr->old_value);
|
|
0
|
4657 else
|
|
380
|
4658 {
|
|
|
4659 /* We checked symbol for validity when we specbound it,
|
|
|
4660 so only need to call Fset if symbol has magic value. */
|
|
398
|
4661 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol);
|
|
380
|
4662 if (!SYMBOL_VALUE_MAGIC_P (sym->value))
|
|
|
4663 sym->value = specpdl_ptr->old_value;
|
|
|
4664 else
|
|
|
4665 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value);
|
|
|
4666 }
|
|
|
4667
|
|
|
4668 #if 0 /* martin */
|
|
0
|
4669 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE
|
|
|
4670 /* There should never be anything here for us to remove.
|
|
|
4671 If so, it indicates a logic error in Emacs. Catches
|
|
|
4672 should get removed when a throw or signal occurs, or
|
|
|
4673 when a catch or condition-case exits normally. But
|
|
|
4674 it's too dangerous to just remove this code. --ben */
|
|
|
4675
|
|
|
4676 /* Furthermore, this code is not in FSFmacs!!!
|
|
|
4677 Braino on mly's part? */
|
|
|
4678 /* If we're unwound past the pdlcount of a catch frame,
|
|
|
4679 that catch can't possibly still be valid. */
|
|
|
4680 while (catchlist && catchlist->pdlcount > specpdl_depth_counter)
|
|
|
4681 {
|
|
|
4682 catchlist = catchlist->next;
|
|
|
4683 /* Don't mess with gcprolist, backtrace_list here */
|
|
|
4684 }
|
|
|
4685 #endif
|
|
380
|
4686 #endif
|
|
0
|
4687 }
|
|
|
4688 if (quitf)
|
|
|
4689 Vquit_flag = Qt;
|
|
|
4690 }
|
|
|
4691
|
|
|
4692
|
|
|
4693
|
|
|
4694 /* Get the value of symbol's global binding, even if that binding is
|
|
|
4695 not now dynamically visible. May return Qunbound or magic values. */
|
|
|
4696
|
|
|
4697 Lisp_Object
|
|
|
4698 top_level_value (Lisp_Object symbol)
|
|
|
4699 {
|
|
|
4700 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4701
|
|
|
4702 CHECK_SYMBOL (symbol);
|
|
|
4703 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4704 {
|
|
|
4705 if (EQ (ptr->symbol, symbol))
|
|
|
4706 return ptr->old_value;
|
|
|
4707 }
|
|
|
4708 return XSYMBOL (symbol)->value;
|
|
|
4709 }
|
|
|
4710
|
|
|
4711 #if 0
|
|
|
4712
|
|
|
4713 Lisp_Object
|
|
|
4714 top_level_set (Lisp_Object symbol, Lisp_Object newval)
|
|
|
4715 {
|
|
|
4716 REGISTER struct specbinding *ptr = specpdl;
|
|
|
4717
|
|
|
4718 CHECK_SYMBOL (symbol);
|
|
|
4719 for (; ptr != specpdl_ptr; ptr++)
|
|
|
4720 {
|
|
|
4721 if (EQ (ptr->symbol, symbol))
|
|
|
4722 {
|
|
|
4723 ptr->old_value = newval;
|
|
|
4724 return newval;
|
|
|
4725 }
|
|
|
4726 }
|
|
|
4727 return Fset (symbol, newval);
|
|
185
|
4728 }
|
|
0
|
4729
|
|
|
4730 #endif /* 0 */
|
|
|
4731
|
|
|
4732
|
|
380
|
4733 /************************************************************************/
|
|
|
4734 /* Backtraces */
|
|
|
4735 /************************************************************************/
|
|
0
|
4736
|
|
20
|
4737 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /*
|
|
0
|
4738 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
|
|
|
4739 The debugger is entered when that frame exits, if the flag is non-nil.
|
|
20
|
4740 */
|
|
|
4741 (level, flag))
|
|
0
|
4742 {
|
|
|
4743 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4744 REGISTER int i;
|
|
|
4745
|
|
|
4746 CHECK_INT (level);
|
|
|
4747
|
|
|
4748 for (i = 0; backlist && i < XINT (level); i++)
|
|
|
4749 {
|
|
|
4750 backlist = backlist->next;
|
|
|
4751 }
|
|
|
4752
|
|
|
4753 if (backlist)
|
|
|
4754 backlist->debug_on_exit = !NILP (flag);
|
|
|
4755
|
|
|
4756 return flag;
|
|
|
4757 }
|
|
|
4758
|
|
|
4759 static void
|
|
|
4760 backtrace_specials (int speccount, int speclimit, Lisp_Object stream)
|
|
|
4761 {
|
|
|
4762 int printing_bindings = 0;
|
|
|
4763
|
|
|
4764 for (; speccount > speclimit; speccount--)
|
|
|
4765 {
|
|
|
4766 if (specpdl[speccount - 1].func == 0
|
|
|
4767 || specpdl[speccount - 1].func == specbind_unwind_local
|
|
|
4768 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local)
|
|
|
4769 {
|
|
|
4770 write_c_string (((!printing_bindings) ? " # bind (" : " "),
|
|
|
4771 stream);
|
|
|
4772 Fprin1 (specpdl[speccount - 1].symbol, stream);
|
|
|
4773 printing_bindings = 1;
|
|
|
4774 }
|
|
|
4775 else
|
|
|
4776 {
|
|
|
4777 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4778 write_c_string (" # (unwind-protect ...)\n", stream);
|
|
|
4779 printing_bindings = 0;
|
|
|
4780 }
|
|
|
4781 }
|
|
|
4782 if (printing_bindings) write_c_string (")\n", stream);
|
|
|
4783 }
|
|
|
4784
|
|
20
|
4785 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /*
|
|
0
|
4786 Print a trace of Lisp function calls currently active.
|
|
398
|
4787 Optional arg STREAM specifies the output stream to send the backtrace to,
|
|
0
|
4788 and defaults to the value of `standard-output'. Optional second arg
|
|
|
4789 DETAILED means show places where currently active variable bindings,
|
|
|
4790 catches, condition-cases, and unwind-protects were made as well as
|
|
185
|
4791 function calls.
|
|
20
|
4792 */
|
|
|
4793 (stream, detailed))
|
|
0
|
4794 {
|
|
249
|
4795 /* This function can GC */
|
|
0
|
4796 struct backtrace *backlist = backtrace_list;
|
|
|
4797 struct catchtag *catches = catchlist;
|
|
380
|
4798 int speccount = specpdl_depth();
|
|
0
|
4799
|
|
|
4800 int old_nl = print_escape_newlines;
|
|
|
4801 int old_pr = print_readably;
|
|
|
4802 Lisp_Object old_level = Vprint_level;
|
|
|
4803 Lisp_Object oiq = Vinhibit_quit;
|
|
|
4804 struct gcpro gcpro1, gcpro2;
|
|
|
4805
|
|
|
4806 /* We can't allow quits in here because that could cause the values
|
|
|
4807 of print_readably and print_escape_newlines to get screwed up.
|
|
|
4808 Normally we would use a record_unwind_protect but that would
|
|
|
4809 screw up the functioning of this function. */
|
|
|
4810 Vinhibit_quit = Qt;
|
|
|
4811
|
|
|
4812 entering_debugger = 0;
|
|
|
4813
|
|
|
4814 Vprint_level = make_int (3);
|
|
|
4815 print_readably = 0;
|
|
|
4816 print_escape_newlines = 1;
|
|
|
4817
|
|
|
4818 GCPRO2 (stream, old_level);
|
|
|
4819
|
|
|
4820 if (NILP (stream))
|
|
|
4821 stream = Vstandard_output;
|
|
|
4822 if (!noninteractive && (NILP (stream) || EQ (stream, Qt)))
|
|
|
4823 stream = Fselected_frame (Qnil);
|
|
|
4824
|
|
|
4825 for (;;)
|
|
|
4826 {
|
|
|
4827 if (!NILP (detailed) && catches && catches->backlist == backlist)
|
|
|
4828 {
|
|
|
4829 int catchpdl = catches->pdlcount;
|
|
398
|
4830 if (speccount > catchpdl
|
|
|
4831 && specpdl[catchpdl].func == condition_case_unwind)
|
|
0
|
4832 /* This is a condition-case catchpoint */
|
|
|
4833 catchpdl = catchpdl + 1;
|
|
185
|
4834
|
|
0
|
4835 backtrace_specials (speccount, catchpdl, stream);
|
|
|
4836
|
|
|
4837 speccount = catches->pdlcount;
|
|
|
4838 if (catchpdl == speccount)
|
|
|
4839 {
|
|
|
4840 write_c_string (" # (catch ", stream);
|
|
|
4841 Fprin1 (catches->tag, stream);
|
|
|
4842 write_c_string (" ...)\n", stream);
|
|
|
4843 }
|
|
|
4844 else
|
|
|
4845 {
|
|
|
4846 write_c_string (" # (condition-case ... . ", stream);
|
|
|
4847 Fprin1 (Fcdr (Fcar (catches->tag)), stream);
|
|
|
4848 write_c_string (")\n", stream);
|
|
|
4849 }
|
|
|
4850 catches = catches->next;
|
|
|
4851 }
|
|
|
4852 else if (!backlist)
|
|
|
4853 break;
|
|
|
4854 else
|
|
|
4855 {
|
|
|
4856 if (!NILP (detailed) && backlist->pdlcount < speccount)
|
|
|
4857 {
|
|
|
4858 backtrace_specials (speccount, backlist->pdlcount, stream);
|
|
|
4859 speccount = backlist->pdlcount;
|
|
|
4860 }
|
|
|
4861 write_c_string (((backlist->debug_on_exit) ? "* " : " "),
|
|
|
4862 stream);
|
|
|
4863 if (backlist->nargs == UNEVALLED)
|
|
|
4864 {
|
|
|
4865 Fprin1 (Fcons (*backlist->function, *backlist->args), stream);
|
|
|
4866 write_c_string ("\n", stream); /* from FSFmacs 19.30 */
|
|
|
4867 }
|
|
|
4868 else
|
|
|
4869 {
|
|
|
4870 Lisp_Object tem = *backlist->function;
|
|
|
4871 Fprin1 (tem, stream); /* This can QUIT */
|
|
|
4872 write_c_string ("(", stream);
|
|
|
4873 if (backlist->nargs == MANY)
|
|
|
4874 {
|
|
|
4875 int i;
|
|
|
4876 Lisp_Object tail = Qnil;
|
|
|
4877 struct gcpro ngcpro1;
|
|
|
4878
|
|
|
4879 NGCPRO1 (tail);
|
|
|
4880 for (tail = *backlist->args, i = 0;
|
|
|
4881 !NILP (tail);
|
|
|
4882 tail = Fcdr (tail), i++)
|
|
|
4883 {
|
|
|
4884 if (i != 0) write_c_string (" ", stream);
|
|
|
4885 Fprin1 (Fcar (tail), stream);
|
|
|
4886 }
|
|
|
4887 NUNGCPRO;
|
|
|
4888 }
|
|
|
4889 else
|
|
|
4890 {
|
|
|
4891 int i;
|
|
|
4892 for (i = 0; i < backlist->nargs; i++)
|
|
|
4893 {
|
|
241
|
4894 if (!i && EQ(tem, Qbyte_code)) {
|
|
|
4895 write_c_string("\"...\"", stream);
|
|
|
4896 continue;
|
|
|
4897 }
|
|
0
|
4898 if (i != 0) write_c_string (" ", stream);
|
|
|
4899 Fprin1 (backlist->args[i], stream);
|
|
|
4900 }
|
|
|
4901 }
|
|
408
|
4902 write_c_string (")\n", stream);
|
|
0
|
4903 }
|
|
|
4904 backlist = backlist->next;
|
|
|
4905 }
|
|
|
4906 }
|
|
|
4907 Vprint_level = old_level;
|
|
|
4908 print_readably = old_pr;
|
|
|
4909 print_escape_newlines = old_nl;
|
|
|
4910 UNGCPRO;
|
|
|
4911 Vinhibit_quit = oiq;
|
|
|
4912 return Qnil;
|
|
|
4913 }
|
|
|
4914
|
|
|
4915
|
|
20
|
4916 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, "", /*
|
|
0
|
4917 Return the function and arguments N frames up from current execution point.
|
|
|
4918 If that frame has not evaluated the arguments yet (or is a special form),
|
|
|
4919 the value is (nil FUNCTION ARG-FORMS...).
|
|
|
4920 If that frame has evaluated its arguments and called its function already,
|
|
|
4921 the value is (t FUNCTION ARG-VALUES...).
|
|
|
4922 A &rest arg is represented as the tail of the list ARG-VALUES.
|
|
|
4923 FUNCTION is whatever was supplied as car of evaluated list,
|
|
|
4924 or a lambda expression for macro calls.
|
|
|
4925 If N is more than the number of frames, the value is nil.
|
|
20
|
4926 */
|
|
|
4927 (nframes))
|
|
0
|
4928 {
|
|
|
4929 REGISTER struct backtrace *backlist = backtrace_list;
|
|
|
4930 REGISTER int i;
|
|
|
4931 Lisp_Object tem;
|
|
|
4932
|
|
|
4933 CHECK_NATNUM (nframes);
|
|
|
4934
|
|
|
4935 /* Find the frame requested. */
|
|
|
4936 for (i = XINT (nframes); backlist && (i-- > 0);)
|
|
|
4937 backlist = backlist->next;
|
|
|
4938
|
|
|
4939 if (!backlist)
|
|
|
4940 return Qnil;
|
|
|
4941 if (backlist->nargs == UNEVALLED)
|
|
|
4942 return Fcons (Qnil, Fcons (*backlist->function, *backlist->args));
|
|
|
4943 else
|
|
|
4944 {
|
|
|
4945 if (backlist->nargs == MANY)
|
|
|
4946 tem = *backlist->args;
|
|
|
4947 else
|
|
|
4948 tem = Flist (backlist->nargs, backlist->args);
|
|
|
4949
|
|
|
4950 return Fcons (Qt, Fcons (*backlist->function, tem));
|
|
|
4951 }
|
|
|
4952 }
|
|
|
4953
|
|
|
4954
|
|
380
|
4955 /************************************************************************/
|
|
|
4956 /* Warnings */
|
|
|
4957 /************************************************************************/
|
|
0
|
4958
|
|
|
4959 void
|
|
|
4960 warn_when_safe_lispobj (Lisp_Object class, Lisp_Object level,
|
|
|
4961 Lisp_Object obj)
|
|
|
4962 {
|
|
|
4963 obj = list1 (list3 (class, level, obj));
|
|
|
4964 if (NILP (Vpending_warnings))
|
|
|
4965 Vpending_warnings = Vpending_warnings_tail = obj;
|
|
|
4966 else
|
|
|
4967 {
|
|
|
4968 Fsetcdr (Vpending_warnings_tail, obj);
|
|
|
4969 Vpending_warnings_tail = obj;
|
|
|
4970 }
|
|
|
4971 }
|
|
|
4972
|
|
|
4973 /* #### This should probably accept Lisp objects; but then we have
|
|
|
4974 to make sure that Feval() isn't called, since it might not be safe.
|
|
|
4975
|
|
|
4976 An alternative approach is to just pass some non-string type of
|
|
380
|
4977 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will
|
|
0
|
4978 automatically be called when it is safe to do so. */
|
|
|
4979
|
|
|
4980 void
|
|
398
|
4981 warn_when_safe (Lisp_Object class, Lisp_Object level, const char *fmt, ...)
|
|
0
|
4982 {
|
|
|
4983 Lisp_Object obj;
|
|
|
4984 va_list args;
|
|
|
4985
|
|
|
4986 va_start (args, fmt);
|
|
398
|
4987 obj = emacs_doprnt_string_va ((const Bufbyte *) GETTEXT (fmt),
|
|
0
|
4988 Qnil, -1, args);
|
|
|
4989 va_end (args);
|
|
|
4990
|
|
|
4991 warn_when_safe_lispobj (class, level, obj);
|
|
|
4992 }
|
|
|
4993
|
|
|
4994
|
|
|
4995
|
|
|
4996
|
|
380
|
4997 /************************************************************************/
|
|
|
4998 /* Initialization */
|
|
|
4999 /************************************************************************/
|
|
0
|
5000
|
|
|
5001 void
|
|
|
5002 syms_of_eval (void)
|
|
|
5003 {
|
|
400
|
5004 INIT_LRECORD_IMPLEMENTATION (subr);
|
|
|
5005
|
|
0
|
5006 defsymbol (&Qinhibit_quit, "inhibit-quit");
|
|
|
5007 defsymbol (&Qautoload, "autoload");
|
|
|
5008 defsymbol (&Qdebug_on_error, "debug-on-error");
|
|
|
5009 defsymbol (&Qstack_trace_on_error, "stack-trace-on-error");
|
|
|
5010 defsymbol (&Qdebug_on_signal, "debug-on-signal");
|
|
|
5011 defsymbol (&Qstack_trace_on_signal, "stack-trace-on-signal");
|
|
|
5012 defsymbol (&Qdebugger, "debugger");
|
|
|
5013 defsymbol (&Qmacro, "macro");
|
|
|
5014 defsymbol (&Qand_rest, "&rest");
|
|
|
5015 defsymbol (&Qand_optional, "&optional");
|
|
|
5016 /* Note that the process code also uses Qexit */
|
|
|
5017 defsymbol (&Qexit, "exit");
|
|
|
5018 defsymbol (&Qsetq, "setq");
|
|
|
5019 defsymbol (&Qinteractive, "interactive");
|
|
|
5020 defsymbol (&Qcommandp, "commandp");
|
|
|
5021 defsymbol (&Qdefun, "defun");
|
|
|
5022 defsymbol (&Qprogn, "progn");
|
|
|
5023 defsymbol (&Qvalues, "values");
|
|
|
5024 defsymbol (&Qdisplay_warning, "display-warning");
|
|
|
5025 defsymbol (&Qrun_hooks, "run-hooks");
|
|
380
|
5026 defsymbol (&Qif, "if");
|
|
0
|
5027
|
|
20
|
5028 DEFSUBR (For);
|
|
|
5029 DEFSUBR (Fand);
|
|
|
5030 DEFSUBR (Fif);
|
|
380
|
5031 DEFSUBR_MACRO (Fwhen);
|
|
|
5032 DEFSUBR_MACRO (Funless);
|
|
20
|
5033 DEFSUBR (Fcond);
|
|
|
5034 DEFSUBR (Fprogn);
|
|
|
5035 DEFSUBR (Fprog1);
|
|
|
5036 DEFSUBR (Fprog2);
|
|
|
5037 DEFSUBR (Fsetq);
|
|
|
5038 DEFSUBR (Fquote);
|
|
|
5039 DEFSUBR (Ffunction);
|
|
|
5040 DEFSUBR (Fdefun);
|
|
|
5041 DEFSUBR (Fdefmacro);
|
|
|
5042 DEFSUBR (Fdefvar);
|
|
|
5043 DEFSUBR (Fdefconst);
|
|
|
5044 DEFSUBR (Fuser_variable_p);
|
|
|
5045 DEFSUBR (Flet);
|
|
|
5046 DEFSUBR (FletX);
|
|
|
5047 DEFSUBR (Fwhile);
|
|
|
5048 DEFSUBR (Fmacroexpand_internal);
|
|
|
5049 DEFSUBR (Fcatch);
|
|
|
5050 DEFSUBR (Fthrow);
|
|
|
5051 DEFSUBR (Funwind_protect);
|
|
|
5052 DEFSUBR (Fcondition_case);
|
|
|
5053 DEFSUBR (Fcall_with_condition_handler);
|
|
|
5054 DEFSUBR (Fsignal);
|
|
|
5055 DEFSUBR (Finteractive_p);
|
|
|
5056 DEFSUBR (Fcommandp);
|
|
|
5057 DEFSUBR (Fcommand_execute);
|
|
|
5058 DEFSUBR (Fautoload);
|
|
|
5059 DEFSUBR (Feval);
|
|
|
5060 DEFSUBR (Fapply);
|
|
|
5061 DEFSUBR (Ffuncall);
|
|
380
|
5062 DEFSUBR (Ffunctionp);
|
|
20
|
5063 DEFSUBR (Ffunction_min_args);
|
|
|
5064 DEFSUBR (Ffunction_max_args);
|
|
|
5065 DEFSUBR (Frun_hooks);
|
|
|
5066 DEFSUBR (Frun_hook_with_args);
|
|
|
5067 DEFSUBR (Frun_hook_with_args_until_success);
|
|
|
5068 DEFSUBR (Frun_hook_with_args_until_failure);
|
|
|
5069 DEFSUBR (Fbacktrace_debug);
|
|
|
5070 DEFSUBR (Fbacktrace);
|
|
|
5071 DEFSUBR (Fbacktrace_frame);
|
|
0
|
5072 }
|
|
|
5073
|
|
|
5074 void
|
|
|
5075 reinit_eval (void)
|
|
|
5076 {
|
|
|
5077 specpdl_ptr = specpdl;
|
|
|
5078 specpdl_depth_counter = 0;
|
|
|
5079 catchlist = 0;
|
|
|
5080 Vcondition_handlers = Qnil;
|
|
|
5081 backtrace_list = 0;
|
|
|
5082 Vquit_flag = Qnil;
|
|
|
5083 debug_on_next_call = 0;
|
|
|
5084 lisp_eval_depth = 0;
|
|
|
5085 entering_debugger = 0;
|
|
|
5086 }
|
|
|
5087
|
|
|
5088 void
|
|
398
|
5089 reinit_vars_of_eval (void)
|
|
|
5090 {
|
|
|
5091 preparing_for_armageddon = 0;
|
|
|
5092 in_warnings = 0;
|
|
|
5093 Qunbound_suspended_errors_tag = make_opaque_ptr (&Qunbound_suspended_errors_tag);
|
|
|
5094 staticpro_nodump (&Qunbound_suspended_errors_tag);
|
|
|
5095
|
|
|
5096 specpdl_size = 50;
|
|
|
5097 specpdl = xnew_array (struct specbinding, specpdl_size);
|
|
|
5098 /* XEmacs change: increase these values. */
|
|
|
5099 max_specpdl_size = 3000;
|
|
|
5100 max_lisp_eval_depth = 500;
|
|
404
|
5101 #ifdef DEFEND_AGAINST_THROW_RECURSION
|
|
398
|
5102 throw_level = 0;
|
|
|
5103 #endif
|
|
|
5104 }
|
|
|
5105
|
|
|
5106 void
|
|
0
|
5107 vars_of_eval (void)
|
|
|
5108 {
|
|
398
|
5109 reinit_vars_of_eval ();
|
|
|
5110
|
|
0
|
5111 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /*
|
|
|
5112 Limit on number of Lisp variable bindings & unwind-protects before error.
|
|
|
5113 */ );
|
|
|
5114
|
|
|
5115 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /*
|
|
|
5116 Limit on depth in `eval', `apply' and `funcall' before error.
|
|
|
5117 This limit is to catch infinite recursions for you before they cause
|
|
|
5118 actual stack overflow in C, which would be fatal for Emacs.
|
|
|
5119 You can safely make it considerably larger than its default value,
|
|
|
5120 if that proves inconveniently small.
|
|
|
5121 */ );
|
|
|
5122
|
|
|
5123 DEFVAR_LISP ("quit-flag", &Vquit_flag /*
|
|
|
5124 Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
|
|
|
5125 Typing C-G sets `quit-flag' non-nil, regardless of `inhibit-quit'.
|
|
|
5126 */ );
|
|
|
5127 Vquit_flag = Qnil;
|
|
|
5128
|
|
|
5129 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /*
|
|
|
5130 Non-nil inhibits C-g quitting from happening immediately.
|
|
|
5131 Note that `quit-flag' will still be set by typing C-g,
|
|
|
5132 so a quit will be signalled as soon as `inhibit-quit' is nil.
|
|
|
5133 To prevent this happening, set `quit-flag' to nil
|
|
|
5134 before making `inhibit-quit' nil. The value of `inhibit-quit' is
|
|
|
5135 ignored if a critical quit is requested by typing control-shift-G in
|
|
|
5136 an X frame.
|
|
|
5137 */ );
|
|
|
5138 Vinhibit_quit = Qnil;
|
|
|
5139
|
|
|
5140 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /*
|
|
|
5141 *Non-nil means automatically display a backtrace buffer
|
|
|
5142 after any error that is not handled by a `condition-case'.
|
|
|
5143 If the value is a list, an error only means to display a backtrace
|
|
|
5144 if one of its condition symbols appears in the list.
|
|
|
5145 See also variable `stack-trace-on-signal'.
|
|
|
5146 */ );
|
|
|
5147 Vstack_trace_on_error = Qnil;
|
|
|
5148
|
|
|
5149 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /*
|
|
|
5150 *Non-nil means automatically display a backtrace buffer
|
|
|
5151 after any error that is signalled, whether or not it is handled by
|
|
|
5152 a `condition-case'.
|
|
|
5153 If the value is a list, an error only means to display a backtrace
|
|
|
5154 if one of its condition symbols appears in the list.
|
|
|
5155 See also variable `stack-trace-on-error'.
|
|
|
5156 */ );
|
|
|
5157 Vstack_trace_on_signal = Qnil;
|
|
|
5158
|
|
163
|
5159 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /*
|
|
|
5160 *List of errors for which the debugger should not be called.
|
|
|
5161 Each element may be a condition-name or a regexp that matches error messages.
|
|
|
5162 If any element applies to a given error, that error skips the debugger
|
|
|
5163 and just returns to top level.
|
|
|
5164 This overrides the variable `debug-on-error'.
|
|
|
5165 It does not apply to errors handled by `condition-case'.
|
|
|
5166 */ );
|
|
|
5167 Vdebug_ignored_errors = Qnil;
|
|
|
5168
|
|
0
|
5169 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /*
|
|
|
5170 *Non-nil means enter debugger if an unhandled error is signalled.
|
|
|
5171 The debugger will not be entered if the error is handled by
|
|
|
5172 a `condition-case'.
|
|
|
5173 If the value is a list, an error only means to enter the debugger
|
|
|
5174 if one of its condition symbols appears in the list.
|
|
181
|
5175 This variable is overridden by `debug-ignored-errors'.
|
|
0
|
5176 See also variables `debug-on-quit' and `debug-on-signal'.
|
|
|
5177 */ );
|
|
|
5178 Vdebug_on_error = Qnil;
|
|
|
5179
|
|
|
5180 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /*
|
|
|
5181 *Non-nil means enter debugger if an error is signalled.
|
|
|
5182 The debugger will be entered whether or not the error is handled by
|
|
|
5183 a `condition-case'.
|
|
|
5184 If the value is a list, an error only means to enter the debugger
|
|
|
5185 if one of its condition symbols appears in the list.
|
|
|
5186 See also variable `debug-on-quit'.
|
|
|
5187 */ );
|
|
|
5188 Vdebug_on_signal = Qnil;
|
|
|
5189
|
|
|
5190 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /*
|
|
|
5191 *Non-nil means enter debugger if quit is signalled (C-G, for example).
|
|
|
5192 Does not apply if quit is handled by a `condition-case'. Entering the
|
|
|
5193 debugger can also be achieved at any time (for X11 console) by typing
|
|
|
5194 control-shift-G to signal a critical quit.
|
|
|
5195 */ );
|
|
|
5196 debug_on_quit = 0;
|
|
|
5197
|
|
|
5198 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /*
|
|
|
5199 Non-nil means enter debugger before next `eval', `apply' or `funcall'.
|
|
|
5200 */ );
|
|
|
5201
|
|
|
5202 DEFVAR_LISP ("debugger", &Vdebugger /*
|
|
|
5203 Function to call to invoke debugger.
|
|
|
5204 If due to frame exit, args are `exit' and the value being returned;
|
|
|
5205 this function's value will be returned instead of that.
|
|
|
5206 If due to error, args are `error' and a list of the args to `signal'.
|
|
|
5207 If due to `apply' or `funcall' entry, one arg, `lambda'.
|
|
|
5208 If due to `eval' entry, one arg, t.
|
|
|
5209 */ );
|
|
|
5210 Vdebugger = Qnil;
|
|
|
5211
|
|
|
5212 staticpro (&Vpending_warnings);
|
|
|
5213 Vpending_warnings = Qnil;
|
|
398
|
5214 pdump_wire (&Vpending_warnings_tail);
|
|
|
5215 Vpending_warnings_tail = Qnil;
|
|
0
|
5216
|
|
|
5217 staticpro (&Vautoload_queue);
|
|
|
5218 Vautoload_queue = Qnil;
|
|
|
5219
|
|
|
5220 staticpro (&Vcondition_handlers);
|
|
|
5221
|
|
|
5222 staticpro (&Vcurrent_warning_class);
|
|
|
5223 Vcurrent_warning_class = Qnil;
|
|
|
5224
|
|
|
5225 staticpro (&Vcurrent_error_state);
|
|
|
5226 Vcurrent_error_state = Qnil; /* errors as normal */
|
|
|
5227
|
|
|
5228 reinit_eval ();
|
|
|
5229 }
|
