Mercurial > hg > xemacs-beta
annotate src/eval.c @ 5466:3600e23880f7
Added tag last-gplv2 for changeset 1c87bdc11d65
| author | Stephen J. Turnbull <stephen@xemacs.org> |
|---|---|
| date | Wed, 27 Apr 2011 04:17:14 +0900 |
| parents | 39304a35b6b3 |
| children | 0af042a0c116 |
| rev | line source |
|---|---|
| 428 | 1 /* Evaluator for XEmacs Lisp interpreter. |
| 2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
|
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4 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2010 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
| 8 XEmacs is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 10 Free Software Foundation; either version 2, or (at your option) any | |
| 11 later version. | |
| 12 | |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with XEmacs; see the file COPYING. If not, write to | |
| 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 Boston, MA 02111-1307, USA. */ | |
| 22 | |
| 23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */ | |
| 24 | |
| 853 | 25 /* Authorship: |
| 26 | |
| 27 Based on code from pre-release FSF 19, c. 1991. | |
| 28 Some work by Richard Mlynarik long ago (c. 1993?) -- | |
| 29 added call-with-condition-handler; synch. up to released FSF 19.7 | |
| 30 for lemacs 19.8. some signal changes. | |
| 31 Various work by Ben Wing, 1995-1996: | |
| 32 added all stuff dealing with trapping errors, suspended-errors, etc. | |
| 33 added most Fsignal front ends. | |
| 34 added warning code. | |
| 35 reworked the Fsignal code and synched the rest up to FSF 19.30. | |
| 36 Some changes by Martin Buchholz c. 1999? | |
| 37 e.g. PRIMITIVE_FUNCALL macros. | |
| 38 New call_trapping_problems code and large comments below | |
| 39 by Ben Wing, Mar-Apr 2000. | |
| 40 */ | |
| 41 | |
| 42 /* This file has been Mule-ized. */ | |
| 43 | |
| 44 /* What is in this file? | |
| 45 | |
| 46 This file contains the engine for the ELisp interpreter in XEmacs. | |
| 47 The engine does the actual work of implementing function calls, | |
| 48 form evaluation, non-local exits (catch, throw, signal, | |
| 49 condition-case, call-with-condition-handler), unwind-protects, | |
| 50 dynamic bindings, let constructs, backtraces, etc. You might say | |
| 51 that this module is the very heart of XEmacs, and everything else | |
| 52 in XEmacs is merely an auxiliary module implementing some specific | |
| 53 functionality that may be called from the heart at an appropriate | |
| 54 time. | |
| 55 | |
| 56 The only exception is the alloc.c module, which implements the | |
| 57 framework upon which this module (eval.c) works. alloc.c works | |
| 58 with creating the actual Lisp objects themselves and garbage | |
| 1960 | 59 collecting them as necessary, presenting a nice, high-level |
| 853 | 60 interface for object creation, deletion, access, and modification. |
| 61 | |
| 62 The only other exception that could be cited is the event-handling | |
| 63 module in event-stream.c. From its perspective, it is also the | |
| 64 heart of XEmacs, and controls exactly what gets done at what time. | |
| 65 From its perspective, eval.c is merely one of the auxiliary modules | |
| 66 out there that can be invoked by event-stream.c. | |
| 67 | |
| 68 Although the event-stream-centric view is a convenient fiction that | |
| 69 makes sense particularly from the user's perspective and from the | |
| 70 perspective of time, the engine-centric view is actually closest to | |
| 71 the truth, because anywhere within the event-stream module, you are | |
| 72 still somewhere in a Lisp backtrace, and event-loops are begun by | |
| 73 functions such as `command-loop-1', a Lisp function. | |
| 74 | |
| 75 As the Lisp engine is doing its thing, it maintains the state of | |
| 1960 | 76 the engine primarily in five list-like items, which are: |
| 853 | 77 |
| 78 -- the backtrace list | |
| 79 -- the catchtag list | |
| 80 -- the condition-handler list | |
| 81 -- the specbind list | |
| 82 -- the GCPRO list. | |
| 83 | |
| 84 These are described in detail in the next comment. | |
| 85 | |
| 86 --ben | |
| 87 */ | |
| 88 | |
| 89 /* Note that there are five separate lists used to maintain state in | |
| 90 the evaluator. All of them conceptually are stacks (last-in, | |
| 91 first-out). All non-local exits happen ultimately through the | |
| 92 catch/throw mechanism, which uses one of the five lists (the | |
| 93 catchtag list) and records the current state of the others in each | |
| 94 frame of the list (some other information is recorded and restored | |
| 95 as well, such as the current eval depth), so that all the state of | |
| 96 the evaluator is restored properly when a non-local exit occurs. | |
| 97 (Note that the current state of the condition-handler list is not | |
| 98 recorded in the catchtag list. Instead, when a condition-case or | |
| 99 call-with-condition-handler is set up, it installs an | |
| 100 unwind-protect on the specbind list to restore the appropriate | |
| 101 setting for the condition-handler list. During the course of | |
| 102 handling the non-local exit, all entries on the specbind list that | |
| 103 are past the location stored in the catch frame are "unwound" | |
| 104 (i.e. variable bindings are restored and unwind-protects are | |
| 105 executed), so the condition-handler list gets reset properly. | |
| 106 | |
| 107 The five lists are | |
| 108 | |
| 109 1. The backtrace list, which is chained through `struct backtrace's | |
| 110 declared in the stack frames of various primitives, and keeps | |
| 111 track of all Lisp function call entries and exits. | |
| 112 2. The catchtag list, which is chained through `struct catchtag's | |
| 113 declared in the stack frames of internal_catch and condition_case_1, | |
| 114 and keeps track of information needed to reset the internal state | |
| 115 of the evaluator to the state that was current when the catch or | |
| 116 condition-case were established, in the event of a non-local exit. | |
| 117 3. The condition-handler list, which is a simple Lisp list with new | |
| 118 entries consed onto the front of the list. It records condition-cases | |
| 119 and call-with-condition-handlers established either from C or from | |
| 120 Lisp. Unlike with the other lists (but similar to everything else | |
| 121 of a similar nature in the rest of the C and Lisp code), it takes care | |
| 122 of restoring itself appropriately in the event of a non-local exit | |
| 123 through the use of the unwind-protect mechanism. | |
| 124 4. The specbind list, which is a contiguous array of `struct specbinding's, | |
| 125 expanded as necessary using realloc(). It holds dynamic variable | |
| 126 bindings (the only kind we currently have in ELisp) and unwind-protects. | |
| 127 5. The GCPRO list, which is chained through `struct gcpro's declared in | |
| 128 the stack frames of any functions that need to GC-protect Lisp_Objects | |
| 129 declared on the stack. This is one of the most fragile areas of the | |
| 130 entire scheme -- you must not forget to UNGCPRO at the end of your | |
| 131 function, you must make sure you GCPRO in many circumstances you don't | |
| 132 think you have to, etc. See the internals manual for more information | |
| 133 about this. | |
| 134 | |
| 135 --ben | |
| 136 */ | |
| 137 | |
| 428 | 138 #include <config.h> |
| 139 #include "lisp.h" | |
| 140 | |
| 141 #include "commands.h" | |
| 142 #include "backtrace.h" | |
| 143 #include "bytecode.h" | |
| 144 #include "buffer.h" | |
| 872 | 145 #include "console-impl.h" |
| 853 | 146 #include "device.h" |
| 147 #include "frame.h" | |
| 148 #include "lstream.h" | |
| 428 | 149 #include "opaque.h" |
| 1292 | 150 #include "profile.h" |
| 853 | 151 #include "window.h" |
| 428 | 152 |
| 153 struct backtrace *backtrace_list; | |
| 154 | |
| 155 /* Macros for calling subrs with an argument list whose length is only | |
| 156 known at runtime. See EXFUN and DEFUN for similar hackery. */ | |
| 157 | |
| 158 #define AV_0(av) | |
| 159 #define AV_1(av) av[0] | |
| 160 #define AV_2(av) AV_1(av), av[1] | |
| 161 #define AV_3(av) AV_2(av), av[2] | |
| 162 #define AV_4(av) AV_3(av), av[3] | |
| 163 #define AV_5(av) AV_4(av), av[4] | |
| 164 #define AV_6(av) AV_5(av), av[5] | |
| 165 #define AV_7(av) AV_6(av), av[6] | |
| 166 #define AV_8(av) AV_7(av), av[7] | |
| 167 | |
| 168 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \ | |
| 444 | 169 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av))) |
| 428 | 170 |
| 171 /* If subrs take more than 8 arguments, more cases need to be added | |
| 172 to this switch. (But wait - don't do it - if you really need | |
| 173 a SUBR with more than 8 arguments, use max_args == MANY. | |
| 853 | 174 Or better, considering using a property list as one of your args. |
| 428 | 175 See the DEFUN macro in lisp.h) */ |
| 176 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \ | |
| 177 void (*PF_fn)(void) = (void (*)(void)) fn; \ | |
| 178 Lisp_Object *PF_av = (av); \ | |
| 179 switch (ac) \ | |
| 180 { \ | |
| 436 | 181 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \ |
| 428 | 182 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \ |
| 183 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \ | |
| 184 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \ | |
| 185 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \ | |
| 186 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \ | |
| 187 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \ | |
| 188 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \ | |
| 189 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \ | |
| 190 } \ | |
| 191 } while (0) | |
| 192 | |
| 193 #define FUNCALL_SUBR(rv, subr, av, ac) \ | |
| 194 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac); | |
| 195 | |
| 196 | |
| 197 /* This is the list of current catches (and also condition-cases). | |
| 853 | 198 This is a stack: the most recent catch is at the head of the list. |
| 199 The list is threaded through the stack frames of the C functions | |
| 200 that set up the catches; this is similar to the way the GCPRO list | |
| 201 is handled, but different from the condition-handler list (which is | |
| 202 a simple Lisp list) and the specbind stack, which is a contiguous | |
| 203 array of `struct specbinding's, grown (using realloc()) as | |
| 204 necessary. (Note that all four of these lists behave as a stacks.) | |
| 205 | |
| 3025 | 206 Catches are created by declaring a `struct catchtag' locally, |
| 853 | 207 filling the .TAG field in with the tag, and doing a setjmp() on |
| 208 .JMP. Fthrow() will store the value passed to it in .VAL and | |
| 209 longjmp() back to .JMP, back to the function that established the | |
| 210 catch. This will always be either internal_catch() (catches | |
| 211 established internally or through `catch') or condition_case_1 | |
| 212 (condition-cases established internally or through | |
| 213 `condition-case'). | |
| 428 | 214 |
| 215 The catchtag also records the current position in the | |
| 216 call stack (stored in BACKTRACE_LIST), the current position | |
| 217 in the specpdl stack (used for variable bindings and | |
| 218 unwind-protects), the value of LISP_EVAL_DEPTH, and the | |
| 219 current position in the GCPRO stack. All of these are | |
| 220 restored by Fthrow(). | |
| 853 | 221 */ |
| 428 | 222 |
| 223 struct catchtag *catchlist; | |
| 224 | |
| 853 | 225 /* A special tag that can be used internally from C code to catch |
| 226 every attempt to throw past this level. */ | |
| 227 Lisp_Object Vcatch_everything_tag; | |
| 228 | |
| 428 | 229 Lisp_Object Qautoload, Qmacro, Qexit; |
| 230 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues; | |
| 231 Lisp_Object Vquit_flag, Vinhibit_quit; | |
| 232 Lisp_Object Qand_rest, Qand_optional; | |
| 233 Lisp_Object Qdebug_on_error, Qstack_trace_on_error; | |
| 234 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal; | |
| 235 Lisp_Object Qdebugger; | |
| 236 Lisp_Object Qinhibit_quit; | |
| 887 | 237 Lisp_Object Qfinalize_list; |
| 428 | 238 Lisp_Object Qrun_hooks; |
| 239 Lisp_Object Qsetq; | |
| 240 Lisp_Object Qdisplay_warning; | |
| 241 Lisp_Object Vpending_warnings, Vpending_warnings_tail; | |
| 242 Lisp_Object Qif; | |
| 243 | |
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244 Lisp_Object Qthrow; |
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245 Lisp_Object Qobsolete_throw; |
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246 Lisp_Object Qmultiple_value_list_internal; |
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247 |
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248 static int first_desired_multiple_value; |
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249 /* Used outside this file, somewhat uncleanly, in the IGNORE_MULTIPLE_VALUES |
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250 macro: */ |
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251 int multiple_value_current_limit; |
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252 |
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253 Fixnum Vmultiple_values_limit; |
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254 |
| 853 | 255 /* Flags specifying which operations are currently inhibited. */ |
| 256 int inhibit_flags; | |
| 257 | |
| 258 /* Buffers, frames, windows, devices, and consoles created since most | |
| 259 recent active | |
| 260 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION). | |
| 261 */ | |
| 262 Lisp_Object Vdeletable_permanent_display_objects; | |
| 263 | |
| 264 /* Buffers created since most recent active | |
| 265 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */ | |
| 266 Lisp_Object Vmodifiable_buffers; | |
| 793 | 267 |
| 268 /* Minimum level at which warnings are logged. Below this, they're ignored | |
| 269 entirely -- not even generated. */ | |
| 270 Lisp_Object Vlog_warning_minimum_level; | |
| 271 | |
| 428 | 272 /* Non-nil means record all fset's and provide's, to be undone |
| 273 if the file being autoloaded is not fully loaded. | |
| 274 They are recorded by being consed onto the front of Vautoload_queue: | |
| 275 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
| 276 Lisp_Object Vautoload_queue; | |
| 277 | |
| 278 /* Current number of specbindings allocated in specpdl. */ | |
| 279 int specpdl_size; | |
| 280 | |
| 281 /* Pointer to beginning of specpdl. */ | |
| 282 struct specbinding *specpdl; | |
| 283 | |
| 284 /* Pointer to first unused element in specpdl. */ | |
| 285 struct specbinding *specpdl_ptr; | |
| 286 | |
| 287 /* specpdl_ptr - specpdl */ | |
| 288 int specpdl_depth_counter; | |
| 289 | |
| 290 /* Maximum size allowed for specpdl allocation */ | |
| 458 | 291 Fixnum max_specpdl_size; |
| 428 | 292 |
| 293 /* Depth in Lisp evaluations and function calls. */ | |
| 1292 | 294 int lisp_eval_depth; |
| 428 | 295 |
| 296 /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
| 458 | 297 Fixnum max_lisp_eval_depth; |
| 428 | 298 |
| 299 /* Nonzero means enter debugger before next function call */ | |
| 300 static int debug_on_next_call; | |
| 301 | |
| 1292 | 302 int backtrace_with_internal_sections; |
| 303 | |
| 428 | 304 /* List of conditions (non-nil atom means all) which cause a backtrace |
| 305 if an error is handled by the command loop's error handler. */ | |
| 306 Lisp_Object Vstack_trace_on_error; | |
| 307 | |
| 308 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 309 if an error is handled by the command loop's error handler. */ | |
| 310 Lisp_Object Vdebug_on_error; | |
| 311 | |
| 312 /* List of conditions and regexps specifying error messages which | |
| 313 do not enter the debugger even if Vdebug_on_error says they should. */ | |
| 314 Lisp_Object Vdebug_ignored_errors; | |
| 315 | |
| 316 /* List of conditions (non-nil atom means all) which cause a backtrace | |
| 317 if any error is signalled. */ | |
| 318 Lisp_Object Vstack_trace_on_signal; | |
| 319 | |
| 320 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 321 if any error is signalled. */ | |
| 322 Lisp_Object Vdebug_on_signal; | |
| 323 | |
| 324 /* Nonzero means enter debugger if a quit signal | |
| 325 is handled by the command loop's error handler. | |
| 326 | |
| 327 From lisp, this is a boolean variable and may have the values 0 and 1. | |
| 328 But, eval.c temporarily uses the second bit of this variable to indicate | |
| 329 that a critical_quit is in progress. The second bit is reset immediately | |
| 330 after it is processed in signal_call_debugger(). */ | |
| 331 int debug_on_quit; | |
| 332 | |
| 333 #if 0 /* FSFmacs */ | |
| 334 /* entering_debugger is basically equivalent */ | |
| 335 /* The value of num_nonmacro_input_chars as of the last time we | |
| 336 started to enter the debugger. If we decide to enter the debugger | |
| 337 again when this is still equal to num_nonmacro_input_chars, then we | |
| 338 know that the debugger itself has an error, and we should just | |
| 339 signal the error instead of entering an infinite loop of debugger | |
| 340 invocations. */ | |
| 341 int when_entered_debugger; | |
| 342 #endif | |
| 343 | |
| 344 /* Nonzero means we are trying to enter the debugger. | |
| 345 This is to prevent recursive attempts. | |
| 346 Cleared by the debugger calling Fbacktrace */ | |
| 347 static int entering_debugger; | |
| 348 | |
| 349 /* Function to call to invoke the debugger */ | |
| 350 Lisp_Object Vdebugger; | |
| 351 | |
| 853 | 352 /* List of condition handlers currently in effect. |
| 353 The elements of this lists were at one point in the past | |
| 354 threaded through the stack frames of Fcondition_case and | |
| 355 related functions, but now are stored separately in a normal | |
| 356 stack. When an error is signaled (by calling Fsignal, below), | |
| 357 this list is searched for an element that applies. | |
| 428 | 358 |
| 359 Each element of this list is one of the following: | |
| 360 | |
| 853 | 361 -- A list of a handler function and possibly args to pass to the |
| 362 function. This is a handler established with the Lisp primitive | |
| 363 `call-with-condition-handler' or related C function | |
| 364 call_with_condition_handler(): | |
| 365 | |
| 366 If the handler function is an opaque ptr object, it is a handler | |
| 367 that was established in C using call_with_condition_handler(), | |
| 368 and the contents of the object are a function pointer which takes | |
| 369 three arguments, the signal name and signal data (same arguments | |
| 370 passed to `signal') and a third Lisp_Object argument, specified | |
| 371 in the call to call_with_condition_handler() and stored as the | |
| 372 second element of the list containing the handler functionl. | |
| 373 | |
| 374 If the handler function is a regular Lisp_Object, it is a handler | |
| 375 that was established using `call-with-condition-handler'. | |
| 376 Currently there are no more arguments in the list containing the | |
| 377 handler function, and only one argument is passed to the handler | |
| 378 function: a cons of the signal name and signal data arguments | |
| 379 passed to `signal'. | |
| 380 | |
| 381 -- A list whose car is Qunbound and whose cdr is Qt. This is a | |
| 382 special condition-case handler established by C code with | |
| 383 condition_case_1(). All errors are trapped; the debugger is not | |
| 384 invoked even if `debug-on-error' was set. | |
| 385 | |
| 386 -- A list whose car is Qunbound and whose cdr is Qerror. This is a | |
| 387 special condition-case handler established by C code with | |
| 388 condition_case_1(). It is like Qt except that the debugger is | |
| 389 invoked normally if it is called for. | |
| 390 | |
| 391 -- A list whose car is Qunbound and whose cdr is a list of lists | |
| 392 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is | |
| 393 a normal `condition-case' handler. | |
| 394 | |
| 395 Note that in all cases *except* the first, there is a corresponding | |
| 396 catch, whose TAG is the value of Vcondition_handlers just after the | |
| 397 handler data just described is pushed onto it. The reason is that | |
| 398 `condition-case' handlers need to throw back to the place where the | |
| 399 handler was installed before invoking it, while | |
| 400 `call-with-condition-handler' handlers are invoked in the | |
| 401 environment that `signal' was invoked in. */ | |
| 402 | |
| 403 | |
| 428 | 404 static Lisp_Object Vcondition_handlers; |
| 405 | |
| 853 | 406 /* I think we should keep this enabled all the time, not just when |
| 407 error checking is enabled, because if one of these puppies pops up, | |
| 408 it will trash the stack if not caught, making it that much harder to | |
| 409 debug. It doesn't cause speed loss. */ | |
| 442 | 410 #define DEFEND_AGAINST_THROW_RECURSION |
| 411 | |
| 412 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 413 /* Used for error catching purposes by throw_or_bomb_out */ |
| 414 static int throw_level; | |
| 442 | 415 #endif |
| 416 | |
| 1123 | 417 static int warning_will_be_discarded (Lisp_Object level); |
| 2532 | 418 static Lisp_Object maybe_get_trapping_problems_backtrace (void); |
| 1123 | 419 |
| 428 | 420 |
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421 |
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422 /* When parsing keyword arguments; is some element of NARGS |
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423 :allow-other-keys, and is that element followed by a non-nil Lisp |
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424 object? */ |
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425 |
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426 Boolint |
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427 non_nil_allow_other_keys_p (Elemcount offset, int nargs, Lisp_Object *args) |
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428 { |
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429 Lisp_Object key, value; |
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430 while (offset + 1 < nargs) |
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431 { |
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432 key = args[offset++]; |
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433 value = args[offset++]; |
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434 if (EQ (key, Q_allow_other_keys)) |
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435 { |
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436 /* The ANSI Common Lisp standard says the first value for a given |
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437 keyword overrides. */ |
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438 return !NILP (value); |
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439 } |
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440 } |
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441 return 0; |
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442 } |
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443 |
| 428 | 444 /************************************************************************/ |
| 445 /* The subr object type */ | |
| 446 /************************************************************************/ | |
| 447 | |
| 448 static void | |
| 2286 | 449 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag)) |
| 428 | 450 { |
| 451 Lisp_Subr *subr = XSUBR (obj); | |
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452 const Ascbyte *header = |
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453 (subr->max_args == UNEVALLED) ? "#<special-operator " : "#<subr "; |
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454 const Ascbyte *name = subr_name (subr); |
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455 const Ascbyte *trailer = subr->prompt ? " (interactive)>" : ">"; |
| 428 | 456 |
| 457 if (print_readably) | |
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458 printing_unreadable_object_fmt ("%s%s%s", header, name, trailer); |
| 428 | 459 |
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460 write_ascstring (printcharfun, header); |
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461 write_ascstring (printcharfun, name); |
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462 write_ascstring (printcharfun, trailer); |
| 428 | 463 } |
| 464 | |
| 1204 | 465 static const struct memory_description subr_description[] = { |
| 2551 | 466 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 428 | 467 { XD_END } |
| 468 }; | |
| 469 | |
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470 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("subr", subr, |
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471 0, print_subr, 0, 0, 0, |
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472 subr_description, |
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473 Lisp_Subr); |
| 428 | 474 |
| 475 /************************************************************************/ | |
| 476 /* Entering the debugger */ | |
| 477 /************************************************************************/ | |
| 478 | |
| 853 | 479 static Lisp_Object |
| 480 current_warning_level (void) | |
| 481 { | |
| 482 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL) | |
| 483 return Qdebug; | |
| 484 else | |
| 485 return Qwarning; | |
| 486 } | |
| 487 | |
| 428 | 488 /* Actually call the debugger. ARG is a list of args that will be |
| 489 passed to the debugger function, as follows; | |
| 490 | |
| 491 If due to frame exit, args are `exit' and the value being returned; | |
| 492 this function's value will be returned instead of that. | |
| 493 If due to error, args are `error' and a list of the args to `signal'. | |
| 494 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 495 If due to `eval' entry, one arg, t. | |
| 496 | |
| 497 */ | |
| 498 | |
| 499 static Lisp_Object | |
| 500 call_debugger_259 (Lisp_Object arg) | |
| 501 { | |
| 502 return apply1 (Vdebugger, arg); | |
| 503 } | |
| 504 | |
| 505 /* Call the debugger, doing some encapsulation. We make sure we have | |
| 506 some room on the eval and specpdl stacks, and bind entering_debugger | |
| 507 to 1 during this call. This is used to trap errors that may occur | |
| 508 when entering the debugger (e.g. the value of `debugger' is invalid), | |
| 509 so that the debugger will not be recursively entered if debug-on-error | |
| 510 is set. (Otherwise, XEmacs would infinitely recurse, attempting to | |
| 511 enter the debugger.) entering_debugger gets reset to 0 as soon | |
| 512 as a backtrace is displayed, so that further errors can indeed be | |
| 513 handled normally. | |
| 514 | |
| 3025 | 515 We also establish a catch for `debugger'. If the debugger function |
| 428 | 516 throws to this instead of returning a value, it means that the user |
| 517 pressed 'c' (pretend like the debugger was never entered). The | |
| 518 function then returns Qunbound. (If the user pressed 'r', for | |
| 519 return a value, then the debugger function returns normally with | |
| 520 this value.) | |
| 521 | |
| 522 The difference between 'c' and 'r' is as follows: | |
| 523 | |
| 524 debug-on-call: | |
| 525 No difference. The call proceeds as normal. | |
| 526 debug-on-exit: | |
| 527 With 'r', the specified value is returned as the function's | |
| 528 return value. With 'c', the value that would normally be | |
| 529 returned is returned. | |
| 530 signal: | |
| 531 With 'r', the specified value is returned as the return | |
| 532 value of `signal'. (This is the only time that `signal' | |
| 533 can return, instead of making a non-local exit.) With `c', | |
| 534 `signal' will continue looking for handlers as if the | |
| 535 debugger was never entered, and will probably end up | |
| 536 throwing to a handler or to top-level. | |
| 537 */ | |
| 538 | |
| 539 static Lisp_Object | |
| 540 call_debugger (Lisp_Object arg) | |
| 541 { | |
| 542 int threw; | |
| 543 Lisp_Object val; | |
| 544 int speccount; | |
| 545 | |
| 853 | 546 debug_on_next_call = 0; |
| 547 | |
| 548 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER) | |
| 549 { | |
| 550 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE)) | |
| 551 warn_when_safe | |
| 552 (Qdebugger, current_warning_level (), | |
| 553 "Unable to enter debugger within critical section"); | |
| 554 return Qunbound; | |
| 555 } | |
| 556 | |
| 428 | 557 if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
| 558 max_lisp_eval_depth = lisp_eval_depth + 20; | |
| 559 if (specpdl_size + 40 > max_specpdl_size) | |
| 560 max_specpdl_size = specpdl_size + 40; | |
| 853 | 561 |
| 562 speccount = internal_bind_int (&entering_debugger, 1); | |
| 2532 | 563 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0, 0); |
| 428 | 564 |
| 771 | 565 return unbind_to_1 (speccount, ((threw) |
| 428 | 566 ? Qunbound /* Not returning a value */ |
| 567 : val)); | |
| 568 } | |
| 569 | |
| 570 /* Called when debug-on-exit behavior is called for. Enter the debugger | |
| 571 with the appropriate args for this. VAL is the exit value that is | |
| 572 about to be returned. */ | |
| 573 | |
| 574 static Lisp_Object | |
| 575 do_debug_on_exit (Lisp_Object val) | |
| 576 { | |
| 577 /* This is falsified by call_debugger */ | |
| 578 Lisp_Object v = call_debugger (list2 (Qexit, val)); | |
| 579 | |
| 580 return !UNBOUNDP (v) ? v : val; | |
| 581 } | |
| 582 | |
| 583 /* Called when debug-on-call behavior is called for. Enter the debugger | |
| 584 with the appropriate args for this. VAL is either t for a call | |
| 3025 | 585 through `eval' or `lambda' for a call through `funcall'. |
| 428 | 586 |
| 587 #### The differentiation here between EVAL and FUNCALL is bogus. | |
| 588 FUNCALL can be defined as | |
| 589 | |
| 590 (defmacro func (fun &rest args) | |
| 591 (cons (eval fun) args)) | |
| 592 | |
| 593 and should be treated as such. | |
| 594 */ | |
| 595 | |
| 596 static void | |
| 597 do_debug_on_call (Lisp_Object code) | |
| 598 { | |
| 599 debug_on_next_call = 0; | |
| 600 backtrace_list->debug_on_exit = 1; | |
| 601 call_debugger (list1 (code)); | |
| 602 } | |
| 603 | |
| 604 /* LIST is the value of one of the variables `debug-on-error', | |
| 605 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal', | |
| 606 and CONDITIONS is the list of error conditions associated with | |
| 607 the error being signalled. This returns non-nil if LIST | |
| 608 matches CONDITIONS. (A nil value for LIST does not match | |
| 609 CONDITIONS. A non-list value for LIST does match CONDITIONS. | |
| 610 A list matches CONDITIONS when one of the symbols in LIST is the | |
| 611 same as one of the symbols in CONDITIONS.) */ | |
| 612 | |
| 613 static int | |
| 614 wants_debugger (Lisp_Object list, Lisp_Object conditions) | |
| 615 { | |
| 616 if (NILP (list)) | |
| 617 return 0; | |
| 618 if (! CONSP (list)) | |
| 619 return 1; | |
| 620 | |
| 621 while (CONSP (conditions)) | |
| 622 { | |
| 2552 | 623 Lisp_Object curr, tail; |
| 624 curr = XCAR (conditions); | |
| 428 | 625 for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 2552 | 626 if (EQ (XCAR (tail), curr)) |
| 428 | 627 return 1; |
| 628 conditions = XCDR (conditions); | |
| 629 } | |
| 630 return 0; | |
| 631 } | |
| 632 | |
| 633 | |
| 634 /* Return 1 if an error with condition-symbols CONDITIONS, | |
| 635 and described by SIGNAL-DATA, should skip the debugger | |
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636 according to debug-ignored-errors. */ |
| 428 | 637 |
| 638 static int | |
| 639 skip_debugger (Lisp_Object conditions, Lisp_Object data) | |
| 640 { | |
| 641 /* This function can GC */ | |
| 642 Lisp_Object tail; | |
| 643 int first_string = 1; | |
| 644 Lisp_Object error_message = Qnil; | |
| 645 | |
| 646 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
| 647 { | |
| 648 if (STRINGP (XCAR (tail))) | |
| 649 { | |
| 650 if (first_string) | |
| 651 { | |
| 652 error_message = Ferror_message_string (data); | |
| 653 first_string = 0; | |
| 654 } | |
| 655 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0) | |
| 656 return 1; | |
| 657 } | |
| 658 else | |
| 659 { | |
| 660 Lisp_Object contail; | |
| 661 | |
| 662 for (contail = conditions; CONSP (contail); contail = XCDR (contail)) | |
| 663 if (EQ (XCAR (tail), XCAR (contail))) | |
| 664 return 1; | |
| 665 } | |
| 666 } | |
| 667 | |
| 668 return 0; | |
| 669 } | |
| 670 | |
| 671 /* Actually generate a backtrace on STREAM. */ | |
| 672 | |
| 673 static Lisp_Object | |
| 674 backtrace_259 (Lisp_Object stream) | |
| 675 { | |
| 676 return Fbacktrace (stream, Qt); | |
| 677 } | |
| 678 | |
| 1130 | 679 #ifdef DEBUG_XEMACS |
| 680 | |
| 681 static void | |
| 682 trace_out_and_die (Lisp_Object err) | |
| 683 { | |
| 684 Fdisplay_error (err, Qt); | |
| 685 backtrace_259 (Qnil); | |
| 686 stderr_out ("XEmacs exiting to debugger.\n"); | |
| 687 Fforce_debugging_signal (Qt); | |
| 688 /* Unlikely to be reached */ | |
| 689 } | |
| 690 | |
| 691 #endif | |
| 692 | |
| 428 | 693 /* An error was signaled. Maybe call the debugger, if the `debug-on-error' |
| 694 etc. variables call for this. CONDITIONS is the list of conditions | |
| 695 associated with the error being signalled. SIG is the actual error | |
| 696 being signalled, and DATA is the associated data (these are exactly | |
| 697 the same as the arguments to `signal'). ACTIVE_HANDLERS is the | |
| 698 list of error handlers that are to be put in place while the debugger | |
| 699 is called. This is generally the remaining handlers that are | |
| 700 outside of the innermost handler trapping this error. This way, | |
| 701 if the same error occurs inside of the debugger, you usually don't get | |
| 702 the debugger entered recursively. | |
| 703 | |
| 704 This function returns Qunbound if it didn't call the debugger or if | |
| 705 the user asked (through 'c') that XEmacs should pretend like the | |
| 706 debugger was never entered. Otherwise, it returns the value | |
| 707 that the user specified with `r'. (Note that much of the time, | |
| 708 the user will abort with C-], and we will never have a chance to | |
| 709 return anything at all.) | |
| 710 | |
| 711 SIGNAL_VARS_ONLY means we should only look at debug-on-signal | |
| 712 and stack-trace-on-signal to control whether we do anything. | |
| 713 This is so that debug-on-error doesn't make handled errors | |
| 714 cause the debugger to get invoked. | |
| 715 | |
| 716 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that | |
| 717 those functions aren't done more than once in a single `signal' | |
| 718 session. */ | |
| 719 | |
| 720 static Lisp_Object | |
| 721 signal_call_debugger (Lisp_Object conditions, | |
| 722 Lisp_Object sig, Lisp_Object data, | |
| 723 Lisp_Object active_handlers, | |
| 724 int signal_vars_only, | |
| 725 int *stack_trace_displayed, | |
| 726 int *debugger_entered) | |
| 727 { | |
| 853 | 728 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 729 /* This function can GC */ |
| 853 | 730 #else /* reality check */ |
| 731 /* This function cannot GC because it inhibits GC during its operation */ | |
| 732 #endif | |
| 733 | |
| 428 | 734 Lisp_Object val = Qunbound; |
| 735 Lisp_Object all_handlers = Vcondition_handlers; | |
| 736 Lisp_Object temp_data = Qnil; | |
| 853 | 737 int outer_speccount = specpdl_depth(); |
| 738 int speccount; | |
| 739 | |
| 740 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE | |
| 428 | 741 struct gcpro gcpro1, gcpro2; |
| 742 GCPRO2 (all_handlers, temp_data); | |
| 853 | 743 #else |
| 744 begin_gc_forbidden (); | |
| 745 #endif | |
| 746 | |
| 747 speccount = specpdl_depth(); | |
| 428 | 748 |
| 749 Vcondition_handlers = active_handlers; | |
| 750 | |
| 751 temp_data = Fcons (sig, data); /* needed for skip_debugger */ | |
| 752 | |
| 753 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only | |
| 754 && wants_debugger (Vstack_trace_on_error, conditions) | |
| 755 && !skip_debugger (conditions, temp_data)) | |
| 756 { | |
| 757 specbind (Qdebug_on_error, Qnil); | |
| 758 specbind (Qstack_trace_on_error, Qnil); | |
| 759 specbind (Qdebug_on_signal, Qnil); | |
| 760 specbind (Qstack_trace_on_signal, Qnil); | |
| 761 | |
| 442 | 762 if (!noninteractive) |
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763 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 764 backtrace_259, |
| 765 Qnil, | |
| 766 Qnil); | |
| 767 else /* in batch mode, we want this going to stderr. */ | |
| 768 backtrace_259 (Qnil); | |
| 771 | 769 unbind_to (speccount); |
| 428 | 770 *stack_trace_displayed = 1; |
| 771 } | |
| 772 | |
| 773 if (!entering_debugger && !*debugger_entered && !signal_vars_only | |
| 774 && (EQ (sig, Qquit) | |
| 775 ? debug_on_quit | |
| 776 : wants_debugger (Vdebug_on_error, conditions)) | |
| 777 && !skip_debugger (conditions, temp_data)) | |
| 778 { | |
| 779 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 780 |
| 428 | 781 specbind (Qdebug_on_error, Qnil); |
| 782 specbind (Qstack_trace_on_error, Qnil); | |
| 783 specbind (Qdebug_on_signal, Qnil); | |
| 784 specbind (Qstack_trace_on_signal, Qnil); | |
| 785 | |
| 1130 | 786 #ifdef DEBUG_XEMACS |
| 787 if (noninteractive) | |
| 788 trace_out_and_die (Fcons (sig, data)); | |
| 789 #endif | |
| 790 | |
| 428 | 791 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 853 | 792 unbind_to (speccount); |
| 428 | 793 *debugger_entered = 1; |
| 794 } | |
| 795 | |
| 796 if (!entering_debugger && !*stack_trace_displayed | |
| 797 && wants_debugger (Vstack_trace_on_signal, conditions)) | |
| 798 { | |
| 799 specbind (Qdebug_on_error, Qnil); | |
| 800 specbind (Qstack_trace_on_error, Qnil); | |
| 801 specbind (Qdebug_on_signal, Qnil); | |
| 802 specbind (Qstack_trace_on_signal, Qnil); | |
| 803 | |
| 442 | 804 if (!noninteractive) |
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805 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 806 backtrace_259, |
| 807 Qnil, | |
| 808 Qnil); | |
| 809 else /* in batch mode, we want this going to stderr. */ | |
| 810 backtrace_259 (Qnil); | |
| 771 | 811 unbind_to (speccount); |
| 428 | 812 *stack_trace_displayed = 1; |
| 813 } | |
| 814 | |
| 815 if (!entering_debugger && !*debugger_entered | |
| 816 && (EQ (sig, Qquit) | |
| 817 ? debug_on_quit | |
| 818 : wants_debugger (Vdebug_on_signal, conditions))) | |
| 819 { | |
| 820 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 821 |
| 428 | 822 specbind (Qdebug_on_error, Qnil); |
| 823 specbind (Qstack_trace_on_error, Qnil); | |
| 824 specbind (Qdebug_on_signal, Qnil); | |
| 825 specbind (Qstack_trace_on_signal, Qnil); | |
| 826 | |
| 1130 | 827 #ifdef DEBUG_XEMACS |
| 828 if (noninteractive) | |
| 829 trace_out_and_die (Fcons (sig, data)); | |
| 830 #endif | |
| 831 | |
| 428 | 832 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 833 *debugger_entered = 1; | |
| 834 } | |
| 835 | |
| 853 | 836 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 837 UNGCPRO; |
| 853 | 838 #endif |
| 428 | 839 Vcondition_handlers = all_handlers; |
| 853 | 840 return unbind_to_1 (outer_speccount, val); |
| 428 | 841 } |
| 842 | |
| 843 | |
| 844 /************************************************************************/ | |
| 845 /* The basic special forms */ | |
| 846 /************************************************************************/ | |
| 847 | |
|
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848 /* Except for Fprogn(), the basic special operators below are only called |
| 428 | 849 from interpreted code. The byte compiler turns them into bytecodes. */ |
| 850 | |
| 851 DEFUN ("or", For, 0, UNEVALLED, 0, /* | |
|
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852 Eval ARGS until one of them yields non-nil, then return that value. |
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853 The remaining ARGS are not evalled at all. |
| 428 | 854 If all args return nil, return nil. |
|
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855 |
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856 Any multiple values from the last form, and only from the last form, are |
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857 passed back. See `values' and `multiple-value-bind'. |
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858 |
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859 arguments: (&rest ARGS) |
| 428 | 860 */ |
| 861 (args)) | |
| 862 { | |
| 863 /* This function can GC */ | |
|
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864 Lisp_Object val = Qnil; |
| 428 | 865 |
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866 LIST_LOOP_3 (arg, args, tail) |
| 428 | 867 { |
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868 if (!NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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869 { |
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870 if (NILP (XCDR (tail))) |
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871 { |
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|
872 /* Pass back multiple values if this is the last one: */ |
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873 return val; |
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874 } |
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|
875 |
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876 return IGNORE_MULTIPLE_VALUES (val); |
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|
877 } |
| 428 | 878 } |
| 879 | |
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880 return val; |
| 428 | 881 } |
| 882 | |
| 883 DEFUN ("and", Fand, 0, UNEVALLED, 0, /* | |
|
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884 Eval ARGS until one of them yields nil, then return nil. |
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885 The remaining ARGS are not evalled at all. |
| 428 | 886 If no arg yields nil, return the last arg's value. |
|
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887 |
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888 Any multiple values from the last form, and only from the last form, are |
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|
889 passed back. See `values' and `multiple-value-bind'. |
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890 |
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|
891 arguments: (&rest ARGS) |
| 428 | 892 */ |
| 893 (args)) | |
| 894 { | |
| 895 /* This function can GC */ | |
|
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896 Lisp_Object val = Qt; |
| 428 | 897 |
|
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898 LIST_LOOP_3 (arg, args, tail) |
| 428 | 899 { |
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900 if (NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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901 { |
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902 if (NILP (XCDR (tail))) |
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903 { |
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904 /* Pass back any multiple values for the last form: */ |
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905 return val; |
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906 } |
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|
907 |
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908 return Qnil; |
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909 } |
| 428 | 910 } |
| 911 | |
| 912 return val; | |
| 913 } | |
| 914 | |
| 915 DEFUN ("if", Fif, 2, UNEVALLED, 0, /* | |
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916 If COND yields non-nil, do THEN, else do ELSE. |
| 428 | 917 Returns the value of THEN or the value of the last of the ELSE's. |
| 918 THEN must be one expression, but ELSE... can be zero or more expressions. | |
| 919 If COND yields nil, and there are no ELSE's, the value is nil. | |
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920 |
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921 arguments: (COND THEN &rest ELSE) |
| 428 | 922 */ |
| 923 (args)) | |
| 924 { | |
| 925 /* This function can GC */ | |
| 926 Lisp_Object condition = XCAR (args); | |
| 927 Lisp_Object then_form = XCAR (XCDR (args)); | |
| 928 Lisp_Object else_forms = XCDR (XCDR (args)); | |
| 929 | |
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930 if (!NILP (IGNORE_MULTIPLE_VALUES (Feval (condition)))) |
| 428 | 931 return Feval (then_form); |
| 932 else | |
| 933 return Fprogn (else_forms); | |
| 934 } | |
| 935 | |
| 936 /* Macros `when' and `unless' are trivially defined in Lisp, | |
| 937 but it helps for bootstrapping to have them ALWAYS defined. */ | |
| 938 | |
| 939 DEFUN ("when", Fwhen, 1, MANY, 0, /* | |
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940 If COND yields non-nil, do BODY, else return nil. |
| 428 | 941 BODY can be zero or more expressions. If BODY is nil, return nil. |
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942 |
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943 arguments: (COND &rest BODY) |
| 428 | 944 */ |
| 945 (int nargs, Lisp_Object *args)) | |
| 946 { | |
| 947 Lisp_Object cond = args[0]; | |
| 948 Lisp_Object body; | |
| 853 | 949 |
| 428 | 950 switch (nargs) |
| 951 { | |
| 952 case 1: body = Qnil; break; | |
| 953 case 2: body = args[1]; break; | |
| 954 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break; | |
| 955 } | |
| 956 | |
| 957 return list3 (Qif, cond, body); | |
| 958 } | |
| 959 | |
| 960 DEFUN ("unless", Funless, 1, MANY, 0, /* | |
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961 If COND yields nil, do BODY, else return nil. |
| 428 | 962 BODY can be zero or more expressions. If BODY is nil, return nil. |
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963 |
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964 arguments: (COND &rest BODY) |
| 428 | 965 */ |
| 966 (int nargs, Lisp_Object *args)) | |
| 967 { | |
| 968 Lisp_Object cond = args[0]; | |
| 969 Lisp_Object body = Flist (nargs-1, args+1); | |
| 970 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body))); | |
| 971 } | |
| 972 | |
| 973 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /* | |
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974 Try each clause until one succeeds. |
| 428 | 975 Each clause looks like (CONDITION BODY...). CONDITION is evaluated |
| 976 and, if the value is non-nil, this clause succeeds: | |
| 977 then the expressions in BODY are evaluated and the last one's | |
| 978 value is the value of the cond-form. | |
| 979 If no clause succeeds, cond returns nil. | |
| 980 If a clause has one element, as in (CONDITION), | |
| 981 CONDITION's value if non-nil is returned from the cond-form. | |
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982 |
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983 arguments: (&rest CLAUSES) |
| 428 | 984 */ |
| 985 (args)) | |
| 986 { | |
| 987 /* This function can GC */ | |
| 442 | 988 REGISTER Lisp_Object val; |
| 428 | 989 |
| 990 LIST_LOOP_2 (clause, args) | |
| 991 { | |
| 992 CHECK_CONS (clause); | |
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993 if (!NILP (val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (clause))))) |
| 428 | 994 { |
| 995 if (!NILP (clause = XCDR (clause))) | |
| 996 { | |
| 997 CHECK_TRUE_LIST (clause); | |
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998 /* Pass back any multiple values here: */ |
| 428 | 999 val = Fprogn (clause); |
| 1000 } | |
| 1001 return val; | |
| 1002 } | |
| 1003 } | |
| 1004 | |
| 1005 return Qnil; | |
| 1006 } | |
| 1007 | |
| 1008 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /* | |
|
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1009 Eval BODY forms sequentially and return value of last one. |
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1010 |
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1011 arguments: (&rest BODY) |
| 428 | 1012 */ |
| 1013 (args)) | |
| 1014 { | |
| 1015 /* This function can GC */ | |
| 1016 /* Caller must provide a true list in ARGS */ | |
| 442 | 1017 REGISTER Lisp_Object val = Qnil; |
| 428 | 1018 struct gcpro gcpro1; |
| 1019 | |
| 1020 GCPRO1 (args); | |
| 1021 | |
| 1022 { | |
| 1023 LIST_LOOP_2 (form, args) | |
| 1024 val = Feval (form); | |
| 1025 } | |
| 1026 | |
| 1027 UNGCPRO; | |
| 1028 return val; | |
| 1029 } | |
| 1030 | |
| 1031 /* Fprog1() is the canonical example of a function that must GCPRO a | |
| 1032 Lisp_Object across calls to Feval(). */ | |
| 1033 | |
| 1034 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /* | |
| 1035 Similar to `progn', but the value of the first form is returned. | |
|
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|
1036 |
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1037 All the arguments are evaluated sequentially. The value of FIRST is saved |
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1038 during evaluation of the remaining args, whose values are discarded. |
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1039 |
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1040 arguments: (FIRST &rest BODY) |
| 428 | 1041 */ |
| 1042 (args)) | |
| 1043 { | |
| 1849 | 1044 Lisp_Object val; |
| 428 | 1045 struct gcpro gcpro1; |
| 1046 | |
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1047 val = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
| 428 | 1048 |
| 1049 GCPRO1 (val); | |
| 1050 | |
| 1051 { | |
| 1052 LIST_LOOP_2 (form, XCDR (args)) | |
| 1053 Feval (form); | |
| 1054 } | |
| 1055 | |
| 1056 UNGCPRO; | |
| 1057 return val; | |
| 1058 } | |
| 1059 | |
| 1060 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /* | |
| 1061 Similar to `progn', but the value of the second form is returned. | |
|
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|
1062 |
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1063 All the arguments are evaluated sequentially. The value of SECOND is saved |
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1064 during evaluation of the remaining args, whose values are discarded. |
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|
1065 |
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|
1066 arguments: (FIRST SECOND &rest BODY) |
| 428 | 1067 */ |
| 1068 (args)) | |
| 1069 { | |
| 1070 /* This function can GC */ | |
| 1849 | 1071 Lisp_Object val; |
| 428 | 1072 struct gcpro gcpro1; |
| 1073 | |
| 1074 Feval (XCAR (args)); | |
| 1075 args = XCDR (args); | |
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1076 |
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1077 val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
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1078 |
| 428 | 1079 args = XCDR (args); |
| 1080 | |
| 1081 GCPRO1 (val); | |
| 1082 | |
| 442 | 1083 { |
| 1084 LIST_LOOP_2 (form, args) | |
| 1085 Feval (form); | |
| 1086 } | |
| 428 | 1087 |
| 1088 UNGCPRO; | |
| 1089 return val; | |
| 1090 } | |
| 1091 | |
| 1092 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /* | |
|
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1093 Bind variables according to VARLIST then eval BODY. |
| 428 | 1094 The value of the last form in BODY is returned. |
| 1095 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1096 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1097 Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
|
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diff
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|
1098 |
|
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|
1099 arguments: (VARLIST &rest BODY) |
| 428 | 1100 */ |
| 1101 (args)) | |
| 1102 { | |
| 1103 /* This function can GC */ | |
| 1104 Lisp_Object varlist = XCAR (args); | |
| 1105 Lisp_Object body = XCDR (args); | |
| 1106 int speccount = specpdl_depth(); | |
| 1107 | |
| 1108 EXTERNAL_LIST_LOOP_3 (var, varlist, tail) | |
| 1109 { | |
| 1110 Lisp_Object symbol, value, tem; | |
| 1111 if (SYMBOLP (var)) | |
| 1112 symbol = var, value = Qnil; | |
| 1113 else | |
| 1114 { | |
| 1115 CHECK_CONS (var); | |
| 1116 symbol = XCAR (var); | |
| 1117 tem = XCDR (var); | |
| 1118 if (NILP (tem)) | |
| 1119 value = Qnil; | |
| 1120 else | |
| 1121 { | |
| 1122 CHECK_CONS (tem); | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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4657
diff
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|
1123 value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 428 | 1124 if (!NILP (XCDR (tem))) |
| 563 | 1125 sferror |
| 428 | 1126 ("`let' bindings can have only one value-form", var); |
| 1127 } | |
| 1128 } | |
| 1129 specbind (symbol, value); | |
| 1130 } | |
| 771 | 1131 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1132 } |
| 1133 | |
| 1134 DEFUN ("let", Flet, 1, UNEVALLED, 0, /* | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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4624
diff
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|
1135 Bind variables according to VARLIST then eval BODY. |
| 428 | 1136 The value of the last form in BODY is returned. |
| 1137 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1138 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1139 All the VALUEFORMs are evalled before any symbols are bound. | |
|
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diff
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|
1140 |
|
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Support #'function-arglist with built-in special forms.
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diff
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|
1141 arguments: (VARLIST &rest BODY) |
| 428 | 1142 */ |
| 1143 (args)) | |
| 1144 { | |
| 1145 /* This function can GC */ | |
| 1146 Lisp_Object varlist = XCAR (args); | |
| 1147 Lisp_Object body = XCDR (args); | |
| 1148 int speccount = specpdl_depth(); | |
| 1149 Lisp_Object *temps; | |
| 1150 int idx; | |
| 1151 struct gcpro gcpro1; | |
| 1152 | |
| 1153 /* Make space to hold the values to give the bound variables. */ | |
| 1154 { | |
| 1155 int varcount; | |
| 1156 GET_EXTERNAL_LIST_LENGTH (varlist, varcount); | |
| 1157 temps = alloca_array (Lisp_Object, varcount); | |
| 1158 } | |
| 1159 | |
| 1160 /* Compute the values and store them in `temps' */ | |
| 1161 GCPRO1 (*temps); | |
| 1162 gcpro1.nvars = 0; | |
| 1163 | |
| 1164 idx = 0; | |
| 442 | 1165 { |
| 1166 LIST_LOOP_2 (var, varlist) | |
| 1167 { | |
| 1168 Lisp_Object *value = &temps[idx++]; | |
| 1169 if (SYMBOLP (var)) | |
| 1170 *value = Qnil; | |
| 1171 else | |
| 1172 { | |
| 1173 Lisp_Object tem; | |
| 1174 CHECK_CONS (var); | |
| 1175 tem = XCDR (var); | |
| 1176 if (NILP (tem)) | |
| 1177 *value = Qnil; | |
| 1178 else | |
| 1179 { | |
| 1180 CHECK_CONS (tem); | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1181 *value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 442 | 1182 gcpro1.nvars = idx; |
| 1183 | |
| 1184 if (!NILP (XCDR (tem))) | |
| 563 | 1185 sferror |
| 442 | 1186 ("`let' bindings can have only one value-form", var); |
| 1187 } | |
| 1188 } | |
| 1189 } | |
| 1190 } | |
| 428 | 1191 |
| 1192 idx = 0; | |
| 442 | 1193 { |
| 1194 LIST_LOOP_2 (var, varlist) | |
| 1195 { | |
| 1196 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]); | |
| 1197 } | |
| 1198 } | |
| 428 | 1199 |
| 1200 UNGCPRO; | |
| 1201 | |
| 771 | 1202 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1203 } |
| 1204 | |
| 1205 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /* | |
|
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4624
diff
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|
1206 If TEST yields non-nil, eval BODY... and repeat. |
| 428 | 1207 The order of execution is thus TEST, BODY, TEST, BODY and so on |
| 1208 until TEST returns nil. | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1209 |
|
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|
1210 arguments: (TEST &rest BODY) |
| 428 | 1211 */ |
| 1212 (args)) | |
| 1213 { | |
| 1214 /* This function can GC */ | |
| 1215 Lisp_Object test = XCAR (args); | |
| 1216 Lisp_Object body = XCDR (args); | |
| 1217 | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
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|
1218 while (!NILP (IGNORE_MULTIPLE_VALUES (Feval (test)))) |
| 428 | 1219 { |
| 1220 QUIT; | |
| 1221 Fprogn (body); | |
| 1222 } | |
| 1223 | |
| 1224 return Qnil; | |
| 1225 } | |
| 1226 | |
| 1227 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /* | |
| 1228 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL. | |
| 1229 The symbols SYM are variables; they are literal (not evaluated). | |
| 1230 The values VAL are expressions; they are evaluated. | |
| 1231 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
| 1232 The second VAL is not computed until after the first SYM is set, and so on; | |
| 1233 each VAL can use the new value of variables set earlier in the `setq'. | |
| 1234 The return value of the `setq' form is the value of the last VAL. | |
| 1235 */ | |
| 1236 (args)) | |
| 1237 { | |
| 1238 /* This function can GC */ | |
| 1239 int nargs; | |
| 2421 | 1240 Lisp_Object retval = Qnil; |
| 428 | 1241 |
| 1242 GET_LIST_LENGTH (args, nargs); | |
| 1243 | |
| 1244 if (nargs & 1) /* Odd number of arguments? */ | |
| 1245 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs))); | |
| 1246 | |
| 2421 | 1247 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args) |
| 428 | 1248 { |
| 1249 val = Feval (val); | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1250 val = IGNORE_MULTIPLE_VALUES (val); |
| 428 | 1251 Fset (symbol, val); |
| 2421 | 1252 retval = val; |
| 428 | 1253 } |
| 1254 | |
| 2421 | 1255 END_GC_PROPERTY_LIST_LOOP (symbol); |
| 1256 | |
| 1257 return retval; | |
| 428 | 1258 } |
| 1259 | |
| 1260 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /* | |
| 1261 Return the argument, without evaluating it. `(quote x)' yields `x'. | |
| 3794 | 1262 |
| 3842 | 1263 `quote' differs from `function' in that it is a hint that an expression is |
| 1264 data, not a function. In particular, under some circumstances the byte | |
| 1265 compiler will compile an expression quoted with `function', but it will | |
| 1266 never do so for an expression quoted with `quote'. These issues are most | |
| 1267 important for lambda expressions (see `lambda'). | |
| 1268 | |
| 1269 There is an alternative, more readable, reader syntax for `quote': a Lisp | |
| 1270 object preceded by `''. Thus, `'x' is equivalent to `(quote x)', in all | |
| 1271 contexts. A print function may use either. Internally the expression is | |
| 1272 represented as `(quote x)'). | |
|
5265
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
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|
1273 |
|
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
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|
1274 arguments: (OBJECT) |
| 428 | 1275 */ |
| 1276 (args)) | |
| 1277 { | |
|
5207
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
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|
1278 int nargs; |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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5146
diff
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|
1279 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
1280 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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|
1281 if (nargs != 1) |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1282 { |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1283 Fsignal (Qwrong_number_of_arguments, |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1284 list2 (Qquote, make_int (nargs))); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
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|
1285 } |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1286 |
| 428 | 1287 return XCAR (args); |
| 1288 } | |
| 1289 | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1290 /* Originally, this was just a function -- but `custom' used a garden- |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1291 variety version, so why not make it a subr? */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1292 DEFUN ("quote-maybe", Fquote_maybe, 1, 1, 0, /* |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1293 Quote EXPR if it is not self quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1294 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1295 In contrast with `quote', this is a function, not a special form; its |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1296 argument is evaluated before `quote-maybe' is called. It returns either |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1297 EXPR (if it is self-quoting) or a list `(quote EXPR)' if it is not |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1298 self-quoting. Lists starting with the symbol `lambda' are regarded as |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1299 self-quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1300 */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1301 (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1302 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1303 if ((XTYPE (expr)) == Lisp_Type_Record) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1304 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1305 switch (XRECORD_LHEADER (expr)->type) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1306 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1307 case lrecord_type_symbol: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1308 if (NILP (expr) || (EQ (expr, Qt)) || SYMBOL_IS_KEYWORD (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1309 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1310 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1311 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1312 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1313 case lrecord_type_cons: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1314 if (EQ (XCAR (expr), Qlambda)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1315 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1316 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1317 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1318 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1319 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1320 case lrecord_type_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1321 case lrecord_type_string: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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parents:
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diff
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|
1322 case lrecord_type_compiled_function: |
|
17f7e9191c0b
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|
1323 case lrecord_type_bit_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1324 case lrecord_type_float: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1325 case lrecord_type_hash_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1326 case lrecord_type_char_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1327 case lrecord_type_range_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1328 case lrecord_type_bignum: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1329 case lrecord_type_ratio: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1330 case lrecord_type_bigfloat: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1331 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1332 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1333 return list2 (Qquote, expr); |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1334 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1335 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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diff
changeset
|
1336 /* Fixnums and characters are self-quoting: */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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parents:
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|
1337 return expr; |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1338 } |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1339 |
| 428 | 1340 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /* |
| 3842 | 1341 Return the argument, without evaluating it. `(function x)' yields `x'. |
| 1342 | |
| 1343 `function' differs from `quote' in that it is a hint that an expression is | |
| 1344 a function, not data. In particular, under some circumstances the byte | |
| 1345 compiler will compile an expression quoted with `function', but it will | |
| 1346 never do so for an expression quoted with `quote'. However, the byte | |
| 1347 compiler will not compile an expression buried in a data structure such as | |
| 1348 a vector or a list which is not syntactically a function. These issues are | |
| 1349 most important for lambda expressions (see `lambda'). | |
| 1350 | |
| 1351 There is an alternative, more readable, reader syntax for `function': a Lisp | |
| 1352 object preceded by `#''. Thus, #'x is equivalent to (function x), in all | |
| 1353 contexts. A print function may use either. Internally the expression is | |
| 1354 represented as `(function x)'). | |
|
5265
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1355 |
|
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1356 arguments: (SYMBOL-OR-LAMBDA) |
| 428 | 1357 */ |
| 1358 (args)) | |
| 1359 { | |
|
5207
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1360 int nargs; |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1361 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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changeset
|
1362 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
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diff
changeset
|
1363 if (nargs != 1) |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1364 { |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1365 Fsignal (Qwrong_number_of_arguments, |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
5146
diff
changeset
|
1366 list2 (Qfunction, make_int (nargs))); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1367 } |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
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diff
changeset
|
1368 |
| 428 | 1369 return XCAR (args); |
| 1370 } | |
| 1371 | |
| 1372 | |
| 1373 /************************************************************************/ | |
| 1374 /* Defining functions/variables */ | |
| 1375 /************************************************************************/ | |
| 1376 static Lisp_Object | |
| 1377 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1378 { | |
| 1379 Ffset (name, defn); | |
|
4535
69a1eda3da06
Distinguish vars and functions in #'symbol-file, #'describe-{function,variable}
Aidan Kehoe <kehoea@parhasard.net>
parents:
4502
diff
changeset
|
1380 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1381 return name; |
| 1382 } | |
| 1383 | |
| 1384 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
|
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80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1385 Define NAME as a function. |
| 428 | 1386 The definition is (lambda ARGLIST [DOCSTRING] BODY...). |
| 1387 See also the function `interactive'. | |
|
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80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1388 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1389 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1390 */ |
| 1391 (args)) | |
| 1392 { | |
| 1393 /* This function can GC */ | |
| 1394 return define_function (XCAR (args), | |
| 1395 Fcons (Qlambda, XCDR (args))); | |
| 1396 } | |
| 1397 | |
| 1398 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
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parents:
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diff
changeset
|
1399 Define NAME as a macro. |
| 428 | 1400 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). |
| 1401 When the macro is called, as in (NAME ARGS...), | |
| 1402 the function (lambda ARGLIST BODY...) is applied to | |
| 1403 the list ARGS... as it appears in the expression, | |
| 1404 and the result should be a form to be evaluated instead of the original. | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1405 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
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parents:
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changeset
|
1406 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1407 */ |
| 1408 (args)) | |
| 1409 { | |
| 1410 /* This function can GC */ | |
| 1411 return define_function (XCAR (args), | |
| 1412 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1413 } | |
| 1414 | |
| 1415 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
|
4642
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Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1416 Define SYMBOL as a variable. |
| 428 | 1417 You are not required to define a variable in order to use it, |
| 1418 but the definition can supply documentation and an initial value | |
| 1419 in a way that tags can recognize. | |
| 1420 | |
| 1421 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1422 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1423 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1424 void.) | |
| 1425 If SYMBOL is buffer-local, its default value is what is set; | |
| 1426 buffer-local values are not affected. | |
| 1427 INITVALUE and DOCSTRING are optional. | |
| 1428 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1429 This means that M-x set-variable recognizes it. |
| 428 | 1430 If INITVALUE is missing, SYMBOL's value is not set. |
| 1431 | |
| 1432 In lisp-interaction-mode defvar is treated as defconst. | |
|
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Support #'function-arglist with built-in special forms.
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parents:
4624
diff
changeset
|
1433 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
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parents:
4624
diff
changeset
|
1434 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1435 */ |
| 1436 (args)) | |
| 1437 { | |
| 1438 /* This function can GC */ | |
| 1439 Lisp_Object sym = XCAR (args); | |
| 1440 | |
| 1441 if (!NILP (args = XCDR (args))) | |
| 1442 { | |
| 1443 Lisp_Object val = XCAR (args); | |
| 1444 | |
| 1445 if (NILP (Fdefault_boundp (sym))) | |
| 1446 { | |
| 1447 struct gcpro gcpro1; | |
| 1448 GCPRO1 (val); | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
1449 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1450 Fset_default (sym, val); |
| 1451 UNGCPRO; | |
| 1452 } | |
| 1453 | |
| 1454 if (!NILP (args = XCDR (args))) | |
| 1455 { | |
| 1456 Lisp_Object doc = XCAR (args); | |
| 1457 Fput (sym, Qvariable_documentation, doc); | |
| 1458 if (!NILP (args = XCDR (args))) | |
| 563 | 1459 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1460 } |
| 1461 } | |
| 1462 | |
| 1463 #ifdef I18N3 | |
| 1464 if (!NILP (Vfile_domain)) | |
| 1465 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1466 #endif | |
| 1467 | |
| 1468 LOADHIST_ATTACH (sym); | |
| 1469 return sym; | |
| 1470 } | |
| 1471 | |
| 1472 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
|
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Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
1473 Define SYMBOL as a constant variable. |
| 428 | 1474 The intent is that programs do not change this value, but users may. |
| 1475 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1476 If SYMBOL is buffer-local, its default value is what is set; | |
| 1477 buffer-local values are not affected. | |
| 1478 DOCSTRING is optional. | |
| 1479 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1480 This means that M-x set-variable recognizes it. |
| 428 | 1481 |
| 1482 Note: do not use `defconst' for user options in libraries that are not | |
| 1483 normally loaded, since it is useful for users to be able to specify | |
| 1484 their own values for such variables before loading the library. | |
| 1485 Since `defconst' unconditionally assigns the variable, | |
| 1486 it would override the user's choice. | |
|
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Support #'function-arglist with built-in special forms.
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parents:
4624
diff
changeset
|
1487 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
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parents:
4624
diff
changeset
|
1488 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1489 */ |
| 1490 (args)) | |
| 1491 { | |
| 1492 /* This function can GC */ | |
| 1493 Lisp_Object sym = XCAR (args); | |
| 1494 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1495 struct gcpro gcpro1; | |
| 1496 | |
| 1497 GCPRO1 (val); | |
| 1498 | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
1499 val = IGNORE_MULTIPLE_VALUES (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
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parents:
4657
diff
changeset
|
1500 |
| 428 | 1501 Fset_default (sym, val); |
| 1502 | |
| 1503 UNGCPRO; | |
| 1504 | |
| 1505 if (!NILP (args = XCDR (args))) | |
| 1506 { | |
| 1507 Lisp_Object doc = XCAR (args); | |
| 1508 Fput (sym, Qvariable_documentation, doc); | |
| 1509 if (!NILP (args = XCDR (args))) | |
| 563 | 1510 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1511 } |
| 1512 | |
| 1513 #ifdef I18N3 | |
| 1514 if (!NILP (Vfile_domain)) | |
| 1515 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1516 #endif | |
| 1517 | |
| 1518 LOADHIST_ATTACH (sym); | |
| 1519 return sym; | |
| 1520 } | |
| 1521 | |
|
4502
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4162
diff
changeset
|
1522 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4162
diff
changeset
|
1523 with the symbol variable aliases. */ |
| 428 | 1524 |
| 1525 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1526 Return result of expanding macros at top level of FORM. | |
| 1527 If FORM is not a macro call, it is returned unchanged. | |
| 1528 Otherwise, the macro is expanded and the expansion is considered | |
| 1529 in place of FORM. When a non-macro-call results, it is returned. | |
| 1530 | |
| 442 | 1531 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1532 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1533 */ | |
| 442 | 1534 (form, environment)) |
| 428 | 1535 { |
| 1536 /* This function can GC */ | |
| 1537 /* With cleanups from Hallvard Furuseth. */ | |
| 1538 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1539 | |
| 1540 while (1) | |
| 1541 { | |
| 1542 /* Come back here each time we expand a macro call, | |
| 1543 in case it expands into another macro call. */ | |
| 1544 if (!CONSP (form)) | |
| 1545 break; | |
| 1546 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1547 def = sym = XCAR (form); | |
| 1548 tem = Qnil; | |
| 1549 /* Trace symbols aliases to other symbols | |
| 1550 until we get a symbol that is not an alias. */ | |
| 1551 while (SYMBOLP (def)) | |
| 1552 { | |
| 1553 QUIT; | |
| 1554 sym = def; | |
| 442 | 1555 tem = Fassq (sym, environment); |
| 428 | 1556 if (NILP (tem)) |
| 1557 { | |
| 1558 def = XSYMBOL (sym)->function; | |
| 1559 if (!UNBOUNDP (def)) | |
| 1560 continue; | |
| 1561 } | |
| 1562 break; | |
| 1563 } | |
| 442 | 1564 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1565 and if TEM is nil then DEF is SYM's function definition. */ |
| 1566 if (NILP (tem)) | |
| 1567 { | |
| 442 | 1568 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1569 Look at its function definition. */ |
| 1570 if (UNBOUNDP (def) | |
| 1571 || !CONSP (def)) | |
| 1572 /* Not defined or definition not suitable */ | |
| 1573 break; | |
| 1574 if (EQ (XCAR (def), Qautoload)) | |
| 1575 { | |
| 1576 /* Autoloading function: will it be a macro when loaded? */ | |
| 1577 tem = Felt (def, make_int (4)); | |
| 1578 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1579 { | |
| 1580 /* Yes, load it and try again. */ | |
| 970 | 1581 /* do_autoload GCPROs both arguments */ |
| 428 | 1582 do_autoload (def, sym); |
| 1583 continue; | |
| 1584 } | |
| 1585 else | |
| 1586 break; | |
| 1587 } | |
| 1588 else if (!EQ (XCAR (def), Qmacro)) | |
| 1589 break; | |
| 1590 else expander = XCDR (def); | |
| 1591 } | |
| 1592 else | |
| 1593 { | |
| 1594 expander = XCDR (tem); | |
| 1595 if (NILP (expander)) | |
| 1596 break; | |
| 1597 } | |
| 1598 form = apply1 (expander, XCDR (form)); | |
| 1599 } | |
| 1600 return form; | |
| 1601 } | |
| 1602 | |
| 1603 | |
| 1604 /************************************************************************/ | |
| 1605 /* Non-local exits */ | |
| 1606 /************************************************************************/ | |
| 1607 | |
| 1318 | 1608 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1609 | |
| 1610 int | |
| 1611 proper_redisplay_wrapping_in_place (void) | |
| 1612 { | |
| 1613 return !in_display | |
| 1614 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1615 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1616 } | |
| 1617 | |
| 1618 static void | |
| 1619 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1620 { | |
| 1621 assert_with_message | |
| 1622 (proper_redisplay_wrapping_in_place (), | |
| 1623 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1624 } | |
| 1625 | |
| 1626 static void | |
| 1627 check_proper_critical_section_lisp_protection (void) | |
| 1628 { | |
| 1629 assert_with_message | |
| 1630 (proper_redisplay_wrapping_in_place (), | |
| 1631 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1632 } | |
| 1633 | |
| 1634 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1635 | |
| 428 | 1636 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
|
4693
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1637 Eval BODY allowing nonlocal exits using `throw'. |
| 428 | 1638 TAG is evalled to get the tag to use. Then the BODY is executed. |
| 3577 | 1639 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1640 If no throw happens, `catch' returns the value of the last BODY form. |
| 1641 If a throw happens, it specifies the value to return from `catch'. | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1642 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1643 arguments: (TAG &rest BODY) |
| 428 | 1644 */ |
| 1645 (args)) | |
| 1646 { | |
| 1647 /* This function can GC */ | |
| 1648 Lisp_Object tag = Feval (XCAR (args)); | |
| 1649 Lisp_Object body = XCDR (args); | |
| 2532 | 1650 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1651 } |
| 1652 | |
| 1653 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1654 FUNC should return a Lisp_Object. | |
| 1655 This is how catches are done from within C code. */ | |
| 1656 | |
| 1657 Lisp_Object | |
| 1658 internal_catch (Lisp_Object tag, | |
| 1659 Lisp_Object (*func) (Lisp_Object arg), | |
| 1660 Lisp_Object arg, | |
| 853 | 1661 int * volatile threw, |
| 2532 | 1662 Lisp_Object * volatile thrown_tag, |
| 1663 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1664 { |
| 1665 /* This structure is made part of the chain `catchlist'. */ | |
| 1666 struct catchtag c; | |
| 1667 | |
| 1668 /* Fill in the components of c, and put it on the list. */ | |
| 1669 c.next = catchlist; | |
| 1670 c.tag = tag; | |
| 853 | 1671 c.actual_tag = Qnil; |
| 2532 | 1672 c.backtrace = Qnil; |
| 428 | 1673 c.val = Qnil; |
| 1674 c.backlist = backtrace_list; | |
| 1675 #if 0 /* FSFmacs */ | |
| 1676 /* #### */ | |
| 1677 c.handlerlist = handlerlist; | |
| 1678 #endif | |
| 1679 c.lisp_eval_depth = lisp_eval_depth; | |
| 1680 c.pdlcount = specpdl_depth(); | |
| 1681 #if 0 /* FSFmacs */ | |
| 1682 c.poll_suppress_count = async_timer_suppress_count; | |
| 1683 #endif | |
| 1684 c.gcpro = gcprolist; | |
| 1685 catchlist = &c; | |
| 1686 | |
| 1687 /* Call FUNC. */ | |
| 1688 if (SETJMP (c.jmp)) | |
| 1689 { | |
| 1690 /* Throw works by a longjmp that comes right here. */ | |
| 1691 if (threw) *threw = 1; | |
| 853 | 1692 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1693 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1694 return c.val; |
| 1695 } | |
| 1696 c.val = (*func) (arg); | |
| 1697 if (threw) *threw = 0; | |
| 853 | 1698 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1699 catchlist = c.next; |
| 853 | 1700 check_catchlist_sanity (); |
| 428 | 1701 return c.val; |
| 1702 } | |
| 1703 | |
| 1704 | |
| 1705 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1706 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1707 | |
| 2297 | 1708 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1709 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1710 condition-case form has a TAG of Qnil. |
| 1711 | |
| 1712 Before each catch is discarded, unbind all special bindings and | |
| 1713 execute all unwind-protect clauses made above that catch. Unwind | |
| 1714 the handler stack as we go, so that the proper handlers are in | |
| 1715 effect for each unwind-protect clause we run. At the end, restore | |
| 1716 some static info saved in CATCH, and longjmp to the location | |
| 1717 specified in the | |
| 1718 | |
| 1719 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1720 | |
| 2268 | 1721 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1722 Lisp_Object)); | |
| 1723 | |
| 1724 static DOESNT_RETURN | |
| 853 | 1725 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1726 { |
| 1727 REGISTER int last_time; | |
| 1728 | |
| 1729 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1730 Before each catch is discarded, unbind all special bindings | |
| 1731 and execute all unwind-protect clauses made above that catch. | |
| 1732 At the end, restore some static info saved in CATCH, | |
| 1733 and longjmp to the location specified. | |
| 1734 */ | |
| 1735 | |
| 1736 /* Save the value somewhere it will be GC'ed. | |
| 1737 (Can't overwrite tag slot because an unwind-protect may | |
| 1738 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1739 c->val = val; | |
| 853 | 1740 c->actual_tag = tag; |
| 428 | 1741 |
| 1742 #if 0 /* FSFmacs */ | |
| 1743 /* Restore the polling-suppression count. */ | |
| 1744 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1745 #endif | |
| 1746 | |
| 617 | 1747 #if 1 |
| 428 | 1748 do |
| 1749 { | |
| 1750 last_time = catchlist == c; | |
| 1751 | |
| 1752 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1753 handlers. */ | |
| 771 | 1754 unbind_to (catchlist->pdlcount); |
| 428 | 1755 catchlist = catchlist->next; |
| 853 | 1756 check_catchlist_sanity (); |
| 428 | 1757 } |
| 1758 while (! last_time); | |
| 617 | 1759 #else |
| 1760 /* Former XEmacs code. This is definitely not as correct because | |
| 1761 there may be a number of catches we're unwinding, and a number | |
| 1762 of unwind-protects in the process. By not undoing the catches till | |
| 1763 the end, there may be invalid catches still current. (This would | |
| 1764 be a particular problem with code like this: | |
| 1765 | |
| 1766 (catch 'foo | |
| 1767 (call-some-code-which-does... | |
| 1768 (catch 'bar | |
| 1769 (unwind-protect | |
| 1770 (call-some-code-which-does... | |
| 1771 (catch 'bar | |
| 1772 (call-some-code-which-does... | |
| 1773 (throw 'foo nil)))) | |
| 1774 (throw 'bar nil))))) | |
| 1775 | |
| 1776 This would try to throw to the inner (catch 'bar)! | |
| 1777 | |
| 1778 --ben | |
| 1779 */ | |
| 428 | 1780 /* Unwind the specpdl stack */ |
| 771 | 1781 unbind_to (c->pdlcount); |
| 428 | 1782 catchlist = c->next; |
| 853 | 1783 check_catchlist_sanity (); |
| 617 | 1784 #endif /* Former code */ |
| 428 | 1785 |
| 1204 | 1786 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1787 if (profiling_active) |
| 1788 { | |
| 1789 while (backtrace_list != c->backlist) | |
| 1790 { | |
| 1791 profile_record_unwind (backtrace_list); | |
| 1792 backtrace_list = backtrace_list->next; | |
| 1793 } | |
| 1794 } | |
| 1795 else | |
| 1796 backtrace_list = c->backlist; | |
| 428 | 1797 lisp_eval_depth = c->lisp_eval_depth; |
| 1798 | |
| 442 | 1799 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1800 throw_level = 0; |
| 1801 #endif | |
| 1802 LONGJMP (c->jmp, 1); | |
| 1803 } | |
| 1804 | |
|
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1805 DECLARE_DOESNT_RETURN (throw_or_bomb_out_unsafe (Lisp_Object, Lisp_Object, int, |
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1806 Lisp_Object, Lisp_Object)); |
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1807 |
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1808 DOESNT_RETURN |
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1809 throw_or_bomb_out_unsafe (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
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1810 Lisp_Object sig, Lisp_Object data) |
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1811 { |
| 428 | 1812 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1813 "last resort" when there is no handler for this error and | |
| 1814 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1815 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1816 initialization stages) we would get in an infinite recursive |
| 1817 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1818 really-early-error-handler. | |
| 1819 | |
| 1820 Note that in fact the only time that the "last resort" | |
| 3025 | 1821 occurs is when there's no catch for `top-level' -- the |
| 1822 `top-level' catch and the catch-all error handler are | |
| 428 | 1823 established at the same time, in initial_command_loop/ |
| 1824 top_level_1. | |
| 1825 | |
| 853 | 1826 [[#### Fix this horrifitude!]] |
| 1827 | |
| 1828 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1829 */ |
| 1830 | |
| 1831 while (1) | |
| 1832 { | |
| 1833 REGISTER struct catchtag *c; | |
| 1834 | |
| 1835 #if 0 /* FSFmacs */ | |
| 1836 if (!NILP (tag)) /* #### */ | |
| 1837 #endif | |
| 1838 for (c = catchlist; c; c = c->next) | |
| 1839 { | |
| 2532 | 1840 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1841 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1842 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1843 unwind_to_catch (c, val, tag); | |
| 428 | 1844 } |
| 1845 if (!bomb_out_p) | |
| 1846 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1847 else | |
| 1848 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1849 } | |
| 1850 } | |
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1851 |
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1852 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
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1853 Lisp_Object, Lisp_Object)); |
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1854 |
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1855 DOESNT_RETURN |
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1856 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
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1857 Lisp_Object sig, Lisp_Object data) |
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1858 { |
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1859 #ifdef DEFEND_AGAINST_THROW_RECURSION |
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1860 /* die if we recurse more than is reasonable */ |
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1861 assert (++throw_level <= 20); |
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1862 #endif |
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1863 |
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1864 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
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1865 check_proper_critical_section_nonlocal_exit_protection (); |
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1866 #endif |
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1867 throw_or_bomb_out_unsafe (tag, val, bomb_out_p, sig, data); |
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1868 } |
| 428 | 1869 |
| 1870 /* See above, where CATCHLIST is defined, for a description of how | |
| 1871 Fthrow() works. | |
| 1872 | |
| 1873 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1874 back to the appropriate condition-case handler after (maybe) | |
| 1875 the debugger is entered. In that case, TAG is the value | |
| 1876 of Vcondition_handlers that was in place just after the | |
| 1877 condition-case handler was set up. The car of this will be | |
| 1878 some data referring to the handler: Its car will be Qunbound | |
| 1879 (thus, this tag can never be generated by Lisp code), and | |
| 1880 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1881 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1882 This works fine because Fthrow() does not care what TAG was | |
| 1883 passed to it: it just looks up the catch list for something | |
| 1884 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1885 back to the place that established the catch (in this case, | |
| 1886 condition_case_1). See below for more info. | |
| 1887 */ | |
| 1888 | |
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1889 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1890 Throw to the catch for TAG and return VALUE from it. |
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1891 |
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1892 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1893 back. Tags are the same if and only if they are `eq'. |
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1894 |
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1895 arguments: (TAG VALUE) |
| 428 | 1896 */ |
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1897 (args)) |
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1898 { |
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1899 int nargs; |
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1900 Lisp_Object tag, value; |
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1901 |
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1902 GET_LIST_LENGTH (args, nargs); |
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1903 if (nargs != 2) |
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1904 { |
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1905 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1906 } |
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1907 |
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1908 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1909 |
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1910 value = Feval (XCAR (XCDR (args))); |
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1911 |
| 444 | 1912 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1913 RETURN_NOT_REACHED (Qnil); |
| 428 | 1914 } |
| 1915 | |
| 1916 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1917 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1918 If BODYFORM completes normally, its value is returned | |
| 1919 after executing the UNWINDFORMS. | |
| 1920 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
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1921 |
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1922 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1923 */ |
| 1924 (args)) | |
| 1925 { | |
| 1926 /* This function can GC */ | |
| 1927 int speccount = specpdl_depth(); | |
| 1928 | |
| 1929 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1930 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1931 } |
| 1932 | |
| 1933 | |
| 1934 /************************************************************************/ | |
| 1292 | 1935 /* Trapping errors */ |
| 428 | 1936 /************************************************************************/ |
| 1937 | |
| 1938 static Lisp_Object | |
| 1939 condition_bind_unwind (Lisp_Object loser) | |
| 1940 { | |
| 617 | 1941 /* There is no problem freeing stuff here like there is in |
| 1942 condition_case_unwind(), because there are no outside pointers | |
| 1943 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1944 |
| 428 | 1945 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1946 Lisp_Object tem = XCAR (loser); | |
| 853 | 1947 int first = 1; |
| 428 | 1948 |
| 1949 while (CONSP (tem)) | |
| 1950 { | |
| 853 | 1951 Lisp_Object victim = tem; |
| 1952 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1953 free_opaque_ptr (XCAR (victim)); | |
| 1954 first = 0; | |
| 1955 tem = XCDR (victim); | |
| 428 | 1956 free_cons (victim); |
| 1957 } | |
| 1958 | |
| 1959 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1960 Vcondition_handlers = XCDR (loser); |
| 1961 | |
| 1962 free_cons (loser); | |
| 428 | 1963 return Qnil; |
| 1964 } | |
| 1965 | |
| 1966 static Lisp_Object | |
| 1967 condition_case_unwind (Lisp_Object loser) | |
| 1968 { | |
| 1969 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1970 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1971 catch. With the recent changes to unwind_to_catch(), the | |
| 1972 evil situation might not happen any more; it certainly could | |
| 1973 happen before because it did. But it's very precarious to rely | |
| 1974 on something like this. #### Instead we should rewrite, adopting | |
| 1975 the FSF's mechanism with a struct handler instead of | |
| 1976 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1977 to hold all of the values, and there's no possibility either of | |
| 1978 crashes from freeing objects too quickly, or objects not getting | |
| 1979 freed and hanging around till the next GC. | |
| 1980 | |
| 1981 In practice, the extra consing here should not matter because | |
| 1982 it only happens when we throw past the condition-case, which almost | |
| 1983 always is the result of an error. Most of the time, there will be | |
| 1984 no error, and we will free the objects below in the main function. | |
| 1985 | |
| 1986 --ben | |
| 1987 | |
| 1988 DO NOT DO: free_cons (XCAR (loser)); | |
| 1989 */ | |
| 1990 | |
| 428 | 1991 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1992 Vcondition_handlers = XCDR (loser); |
| 1993 | |
| 1994 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1995 return Qnil; |
| 1996 } | |
| 1997 | |
| 1998 /* Split out from condition_case_3 so that primitive C callers | |
| 1999 don't have to cons up a lisp handler form to be evaluated. */ | |
| 2000 | |
| 2001 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 2002 specified by HANDLERS. If no error occurs that is indicated by | |
| 2003 HANDLERS as something to be caught, the return value of this | |
| 2004 function is the return value from BFUN. If such an error does | |
| 2005 occur, HFUN is called, and its return value becomes the | |
| 2006 return value of condition_case_1(). The second argument passed | |
| 2007 to HFUN will always be HARG. The first argument depends on | |
| 2008 HANDLERS: | |
| 2009 | |
| 2010 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 2011 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 2012 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 2013 arguments passed to `signal'. The debugger is not invoked even if | |
| 2014 `debug-on-error' was set. | |
| 2015 | |
| 2016 A HANDLERS value of Qerror is the same as Qt except that the | |
| 2017 debugger is invoked if `debug-on-error' was set. | |
| 2018 | |
| 2019 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 2020 exactly as in `condition-case', and errors will be trapped | |
| 2021 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 2022 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 2023 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 2024 | |
| 2025 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 2026 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 2027 for why), establishes a catch whose tag is this new value of | |
| 2028 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 2029 it calls Fthrow(), setting TAG to this same new value of | |
| 2030 Vcondition_handlers and setting VAL to the same thing that will | |
| 2031 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 2032 jump point we just established, and we in turn just call the | |
| 2033 HFUN and return its value. | |
| 2034 | |
| 2035 For a real condition-case, HFUN will always be | |
| 2036 run_condition_case_handlers() and HARG is the argument VAR | |
| 2037 to condition-case. That function just binds VAR to the cons | |
| 2038 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 2039 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 2040 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 2041 it had *before* condition_case_1() was called. This maintains | |
| 2042 consistency (so that the state of things at exit of | |
| 2043 condition_case_1() is the same as at entry), and implies | |
| 2044 that the handler can signal the same error again (possibly | |
| 2045 after processing of its own), without getting in an infinite | |
| 2046 loop. */ | |
| 2047 | |
| 2048 Lisp_Object | |
| 2049 condition_case_1 (Lisp_Object handlers, | |
| 2050 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 2051 Lisp_Object barg, | |
| 2052 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2053 Lisp_Object harg) | |
| 2054 { | |
| 2055 int speccount = specpdl_depth(); | |
| 2056 struct catchtag c; | |
| 617 | 2057 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2058 |
| 2059 #if 0 /* FSFmacs */ | |
| 2060 c.tag = Qnil; | |
| 2061 #else | |
| 2062 /* Do consing now so out-of-memory error happens up front */ | |
| 2063 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2064 which is known specially by Fsignal. | |
| 617 | 2065 [[ This is an abomination, but to fix it would require either |
| 428 | 2066 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2067 or changing the byte-compiler output (no thanks).]] |
| 2068 | |
| 2069 The above comment is clearly wrong. FSF does not do it this way | |
| 2070 and did not change the byte-compiler output. Instead they use a | |
| 2071 `struct handler' to hold the various values (in place of our | |
| 2072 Vcondition_handlers) and chain them together, with pointers from | |
| 2073 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2074 consider moving to something similar, but not before I merge my | |
| 2075 stderr-proc workspace, which contains changes to these | |
| 2076 functions. --ben */ | |
| 428 | 2077 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2078 Vcondition_handlers); | |
| 2079 #endif | |
| 2080 c.val = Qnil; | |
| 853 | 2081 c.actual_tag = Qnil; |
| 2532 | 2082 c.backtrace = Qnil; |
| 428 | 2083 c.backlist = backtrace_list; |
| 2084 #if 0 /* FSFmacs */ | |
| 2085 /* #### */ | |
| 2086 c.handlerlist = handlerlist; | |
| 2087 #endif | |
| 2088 c.lisp_eval_depth = lisp_eval_depth; | |
| 2089 c.pdlcount = specpdl_depth(); | |
| 2090 #if 0 /* FSFmacs */ | |
| 2091 c.poll_suppress_count = async_timer_suppress_count; | |
| 2092 #endif | |
| 2093 c.gcpro = gcprolist; | |
| 2094 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2095 c.next = catchlist; | |
| 2096 | |
| 2097 if (SETJMP (c.jmp)) | |
| 2098 { | |
| 2099 /* throw does ungcpro, etc */ | |
| 2100 return (*hfun) (c.val, harg); | |
| 2101 } | |
| 2102 | |
| 2103 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2104 | |
| 2105 catchlist = &c; | |
| 2106 #if 0 /* FSFmacs */ | |
| 2107 h.handler = handlers; | |
| 2108 h.var = Qnil; | |
| 2109 h.next = handlerlist; | |
| 2110 h.tag = &c; | |
| 2111 handlerlist = &h; | |
| 2112 #else | |
| 2113 Vcondition_handlers = c.tag; | |
| 2114 #endif | |
| 2115 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2116 c.val = ((*bfun) (barg)); | |
| 2117 UNGCPRO; | |
| 617 | 2118 |
| 2119 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2120 GCPRO3 (harg, c.val, c.tag); | |
| 2121 | |
| 428 | 2122 catchlist = c.next; |
| 853 | 2123 check_catchlist_sanity (); |
| 617 | 2124 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2125 delete this here. */ | |
| 428 | 2126 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2127 unbind_to (speccount); |
| 617 | 2128 |
| 2129 UNGCPRO; | |
| 2130 /* free the conses *after* the unbind, because the unbind will run | |
| 2131 condition_case_unwind above. */ | |
| 853 | 2132 free_cons (XCAR (c.tag)); |
| 2133 free_cons (c.tag); | |
| 617 | 2134 return c.val; |
| 428 | 2135 } |
| 2136 | |
| 2137 static Lisp_Object | |
| 2138 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2139 { | |
| 2140 /* This function can GC */ | |
| 2141 #if 0 /* FSFmacs */ | |
| 2142 if (!NILP (h.var)) | |
| 2143 specbind (h.var, c.val); | |
| 2144 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2145 | |
| 2146 /* Note that this just undoes the binding of h.var; whoever | |
| 2147 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2148 throwing. */ | |
| 771 | 2149 unbind_to (c.pdlcount); |
| 428 | 2150 return val; |
| 2151 #else | |
| 2152 int speccount; | |
| 2153 | |
| 2154 CHECK_TRUE_LIST (val); | |
| 2155 if (NILP (var)) | |
| 2156 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2157 | |
| 2158 speccount = specpdl_depth(); | |
| 2159 specbind (var, Fcar (val)); | |
| 2160 val = Fprogn (Fcdr (val)); | |
| 771 | 2161 return unbind_to_1 (speccount, val); |
| 428 | 2162 #endif |
| 2163 } | |
| 2164 | |
| 2165 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2166 condition-case except that it takes three arguments rather | |
| 2167 than a single list of arguments. */ | |
| 2168 Lisp_Object | |
| 2169 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2170 { | |
| 2171 /* This function can GC */ | |
| 2172 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2173 { | |
| 2174 if (NILP (handler)) | |
| 2175 ; | |
| 2176 else if (CONSP (handler)) | |
| 2177 { | |
| 2178 Lisp_Object conditions = XCAR (handler); | |
| 2179 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2180 if (SYMBOLP (conditions)) | |
| 2181 ; | |
| 2182 else | |
| 2183 { | |
| 2184 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2185 if (!SYMBOLP (condition)) | |
| 2186 goto invalid_condition_handler; | |
| 2187 } | |
| 2188 } | |
| 2189 else | |
| 2190 { | |
| 2191 invalid_condition_handler: | |
| 563 | 2192 sferror ("Invalid condition handler", handler); |
| 428 | 2193 } |
| 2194 } | |
| 2195 | |
| 2196 CHECK_SYMBOL (var); | |
| 2197 | |
| 2198 return condition_case_1 (handlers, | |
| 2199 Feval, bodyform, | |
| 2200 run_condition_case_handlers, | |
| 2201 var); | |
| 2202 } | |
| 2203 | |
| 2204 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2205 Regain control when an error is signalled. | |
| 2206 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2207 Executes BODYFORM and returns its value if no error happens. | |
| 2208 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2209 where the BODY is made of Lisp expressions. | |
| 2210 | |
| 771 | 2211 A typical usage of `condition-case' looks like this: |
| 2212 | |
| 2213 (condition-case nil | |
| 2214 ;; you need a progn here if you want more than one statement ... | |
| 2215 (progn | |
| 2216 (do-something) | |
| 2217 (do-something-else)) | |
| 2218 (error | |
| 2219 (issue-warning-or) | |
| 2220 ;; but strangely, you don't need one here. | |
| 2221 (return-a-value-etc) | |
| 2222 )) | |
| 2223 | |
| 428 | 2224 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2225 error's condition names. If an error happens, the first applicable | |
| 2226 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2227 all errors, even those without the `error' condition name on them | |
| 2228 \(e.g. `quit'). | |
| 2229 | |
| 2230 The car of a handler may be a list of condition names | |
| 2231 instead of a single condition name. | |
| 2232 | |
| 2233 When a handler handles an error, | |
| 2234 control returns to the condition-case and the handler BODY... is executed | |
| 2235 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2236 VAR may be nil; then you do not get access to the signal information. | |
| 2237 | |
| 2238 The value of the last BODY form is returned from the condition-case. | |
| 2239 See also the function `signal' for more info. | |
| 2240 | |
| 2241 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2242 and the current catches, condition-cases, and bindings have all been | |
| 2243 popped back to the state they were in just before the call to | |
| 2244 `condition-case'. This means that resignalling the error from | |
| 2245 within the handler will not result in an infinite loop. | |
| 2246 | |
| 2247 If you want to establish an error handler that is called with the | |
| 2248 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2249 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2250 */ | |
| 2251 (args)) | |
| 2252 { | |
| 2253 /* This function can GC */ | |
| 2254 Lisp_Object var = XCAR (args); | |
| 2255 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2256 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2257 return condition_case_3 (bodyform, var, handlers); | |
| 2258 } | |
| 2259 | |
| 2260 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
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changeset
|
2261 Call FUNCTION with arguments ARGS, regaining control on error. |
|
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4686
diff
changeset
|
2262 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
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4686
diff
changeset
|
2263 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2264 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2265 that was current when `signal' was called, rather than when the handler | |
| 2266 was established. | |
| 2267 | |
| 2268 HANDLER should be a function of one argument, which is a cons of the args | |
| 2269 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2270 `signal' is called (this differs from `condition-case', which allows | |
| 2271 you to specify which errors are trapped). If the handler function | |
| 2272 returns, `signal' continues as if the handler were never invoked. | |
| 2273 \(It continues to look for handlers established earlier than this one, | |
| 2274 and invokes the standard error-handler if none is found.) | |
|
4693
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diff
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|
2275 |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
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|
2276 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2277 */ |
| 2278 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2279 { | |
| 2280 /* This function can GC */ | |
| 2281 int speccount = specpdl_depth(); | |
| 2282 Lisp_Object tem; | |
| 2283 | |
| 853 | 2284 tem = Ffunction_max_args (args[0]); |
| 2285 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2286 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2287 invalid_argument ("Must be function of one argument", args[0]); | |
| 2288 | |
| 2289 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2290 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2291 record_unwind_protect (condition_bind_unwind, tem); | |
| 2292 Vcondition_handlers = tem; | |
| 2293 | |
| 2294 /* Caller should have GC-protected args */ | |
| 771 | 2295 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2296 } |
| 2297 | |
| 853 | 2298 /* This is the C version of the above function. It calls FUN, passing it |
| 2299 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2300 which they were signalled. (HANDLER is only invoked if there was no | |
| 2301 handler (either from condition-case or call-with-condition-handler) set | |
| 2302 later on that handled the signal; therefore, this is a real error. | |
| 2303 | |
| 2304 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2305 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2306 ARG be void * to facilitate passing structures, but I changed to | |
| 2307 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2308 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2309 to convert between Lisp_Objects and structure pointers. */ | |
| 2310 | |
| 2311 Lisp_Object | |
| 2312 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2313 Lisp_Object), | |
| 2314 Lisp_Object handler_arg, | |
| 2315 Lisp_Object (*fun) (Lisp_Object), | |
| 2316 Lisp_Object arg) | |
| 2317 { | |
| 2318 /* This function can GC */ | |
| 1111 | 2319 int speccount = specpdl_depth (); |
| 853 | 2320 Lisp_Object tem; |
| 2321 | |
| 2322 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2323 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2324 noseeum_cons (handler_arg, Qnil)), |
| 2325 Vcondition_handlers); | |
| 2326 record_unwind_protect (condition_bind_unwind, tem); | |
| 2327 Vcondition_handlers = tem; | |
| 2328 | |
| 2329 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2330 } | |
| 2331 | |
| 428 | 2332 static int |
| 2333 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2334 { | |
| 2335 if (EQ (type, Qt)) | |
| 2336 /* (condition-case c # (t c)) catches -all- signals | |
| 2337 * Use with caution! */ | |
| 2338 return 1; | |
| 2339 | |
| 2340 if (SYMBOLP (type)) | |
| 2341 return !NILP (Fmemq (type, conditions)); | |
| 2342 | |
| 2343 for (; CONSP (type); type = XCDR (type)) | |
| 2344 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2345 return 1; | |
| 2346 | |
| 2347 return 0; | |
| 2348 } | |
| 2349 | |
| 2350 static Lisp_Object | |
| 2351 return_from_signal (Lisp_Object value) | |
| 2352 { | |
| 2353 #if 1 | |
| 2354 /* Most callers are not prepared to handle gc if this | |
| 2355 returns. So, since this feature is not very useful, | |
| 2356 take it out. */ | |
| 2357 /* Have called debugger; return value to signaller */ | |
| 2358 return value; | |
| 2359 #else /* But the reality is that that stinks, because: */ | |
| 2360 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2361 to be continuable!! */ | |
| 563 | 2362 signal_error (Qunimplemented, |
| 2363 "Returning a value from an error is no longer supported", | |
| 2364 Qunbound); | |
| 428 | 2365 #endif |
| 2366 } | |
| 2367 | |
| 2368 | |
| 2369 /************************************************************************/ | |
| 2370 /* the workhorse error-signaling function */ | |
| 2371 /************************************************************************/ | |
| 2372 | |
| 853 | 2373 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2374 that won't get signalled for errors occurring when | |
| 2375 call_with_suspended_errors() was invoked. */ | |
| 2376 | |
| 872 | 2377 /* Don't make static or it might be compiled away */ |
| 2378 void signal_1 (void); | |
| 2379 | |
| 2380 void | |
| 853 | 2381 signal_1 (void) |
| 2382 { | |
| 2383 } | |
| 2384 | |
| 428 | 2385 /* #### This function has not been synched with FSF. It diverges |
| 2386 significantly. */ | |
| 2387 | |
| 853 | 2388 /* The simplest external error function: it would be called |
| 2389 signal_continuable_error() in the terminology below, but it's | |
| 2390 Lisp-callable. */ | |
| 2391 | |
| 2392 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2393 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2394 An error symbol is a symbol defined using `define-error'. | |
| 2395 DATA should be a list. Its elements are printed as part of the error message. | |
| 2396 If the signal is handled, DATA is made available to the handler. | |
| 2397 See also the function `signal-error', and the functions to handle errors: | |
| 2398 `condition-case' and `call-with-condition-handler'. | |
| 2399 | |
| 2400 Note that this function can return, if the debugger is invoked and the | |
| 2401 user invokes the "return from signal" option. | |
| 2402 */ | |
| 2403 (error_symbol, data)) | |
| 428 | 2404 { |
| 2405 /* This function can GC */ | |
| 853 | 2406 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2407 Lisp_Object conditions = Qnil; | |
| 2408 Lisp_Object handlers = Qnil; | |
| 428 | 2409 /* signal_call_debugger() could get called more than once |
| 2410 (once when a call-with-condition-handler is about to | |
| 2411 be dealt with, and another when a condition-case handler | |
| 2412 is about to be invoked). So make sure the debugger and/or | |
| 2413 stack trace aren't done more than once. */ | |
| 2414 int stack_trace_displayed = 0; | |
| 2415 int debugger_entered = 0; | |
| 853 | 2416 |
| 2417 /* Fsignal() is one of these functions that's called all the time | |
| 2418 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2419 protect the objects because all sorts of weird stuff could | |
| 2420 happen. */ | |
| 2421 | |
| 2422 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2423 | |
| 2424 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2425 signal_1 (); | |
| 428 | 2426 |
| 2427 if (!initialized) | |
| 2428 { | |
| 2429 /* who knows how much has been initialized? Safest bet is | |
| 2430 just to bomb out immediately. */ | |
| 771 | 2431 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2432 ABORT (); |
| 428 | 2433 } |
| 2434 | |
| 3092 | 2435 #ifndef NEW_GC |
| 1123 | 2436 assert (!gc_in_progress); |
| 3092 | 2437 #endif /* not NEW_GC */ |
| 1123 | 2438 |
| 2439 /* We abort if in_display and we are not protected, as garbage | |
| 2440 collections and non-local exits will invariably be fatal, but in | |
| 2441 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2442 */ | |
| 2443 | |
| 1318 | 2444 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2445 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2446 #endif |
| 428 | 2447 |
| 853 | 2448 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2449 |
| 2450 for (handlers = Vcondition_handlers; | |
| 2451 CONSP (handlers); | |
| 2452 handlers = XCDR (handlers)) | |
| 2453 { | |
| 2454 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2455 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2456 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2457 | |
| 2458 if (!UNBOUNDP (handler_fun)) | |
| 2459 { | |
| 2460 /* call-with-condition-handler */ | |
| 2461 Lisp_Object tem; | |
| 2462 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2463 struct gcpro ngcpro1; | |
| 2464 NGCPRO1 (all_handlers); | |
| 2465 Vcondition_handlers = outer_handlers; | |
| 2466 | |
| 853 | 2467 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2468 outer_handlers, 1, |
| 2469 &stack_trace_displayed, | |
| 2470 &debugger_entered); | |
| 2471 if (!UNBOUNDP (tem)) | |
| 2472 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2473 | |
| 853 | 2474 if (OPAQUE_PTRP (handler_fun)) |
| 2475 { | |
| 2476 if (NILP (handler_data)) | |
| 2477 { | |
| 2478 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2479 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2480 (get_opaque_ptr (handler_fun)); | |
| 2481 | |
| 2482 tem = (*hfun) (error_symbol, data); | |
| 2483 } | |
| 2484 else | |
| 2485 { | |
| 2486 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2487 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2488 (get_opaque_ptr (handler_fun)); | |
| 2489 | |
| 2490 assert (NILP (XCDR (handler_data))); | |
| 2491 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2492 } | |
| 2493 } | |
| 2494 else | |
| 2495 { | |
| 2496 tem = Fcons (error_symbol, data); | |
| 2497 if (NILP (handler_data)) | |
| 2498 tem = call1 (handler_fun, tem); | |
| 2499 else | |
| 2500 { | |
| 2501 /* (This code won't be used (for now?).) */ | |
| 2502 struct gcpro nngcpro1; | |
| 2503 Lisp_Object args[3]; | |
| 2504 NNGCPRO1 (args[0]); | |
| 2505 nngcpro1.nvars = 3; | |
| 2506 args[0] = handler_fun; | |
| 2507 args[1] = tem; | |
| 2508 args[2] = handler_data; | |
| 2509 nngcpro1.var = args; | |
| 2510 tem = Fapply (3, args); | |
| 2511 NNUNGCPRO; | |
| 2512 } | |
| 2513 } | |
| 428 | 2514 NUNGCPRO; |
| 2515 #if 0 | |
| 2516 if (!EQ (tem, Qsignal)) | |
| 2517 return return_from_signal (tem); | |
| 2518 #endif | |
| 2519 /* If handler didn't throw, try another handler */ | |
| 2520 Vcondition_handlers = all_handlers; | |
| 2521 } | |
| 2522 | |
| 2523 /* It's a condition-case handler */ | |
| 2524 | |
| 2525 /* t is used by handlers for all conditions, set up by C code. | |
| 2526 * debugger is not called even if debug_on_error */ | |
| 2527 else if (EQ (handler_data, Qt)) | |
| 2528 { | |
| 2529 UNGCPRO; | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2530 throw_or_bomb_out (handlers, Fcons (error_symbol, data), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2531 0, Qnil, Qnil); |
| 428 | 2532 } |
| 2533 /* `error' is used similarly to the way `t' is used, but in | |
| 2534 addition it invokes the debugger if debug_on_error. | |
| 2535 This is normally used for the outer command-loop error | |
| 2536 handler. */ | |
| 2537 else if (EQ (handler_data, Qerror)) | |
| 2538 { | |
| 853 | 2539 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2540 data, | |
| 428 | 2541 outer_handlers, 0, |
| 2542 &stack_trace_displayed, | |
| 2543 &debugger_entered); | |
| 2544 | |
| 2545 UNGCPRO; | |
| 2546 if (!UNBOUNDP (tem)) | |
| 2547 return return_from_signal (tem); | |
| 2548 | |
| 853 | 2549 tem = Fcons (error_symbol, data); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2550 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2551 } |
| 2552 else | |
| 2553 { | |
| 2554 /* handler established by real (Lisp) condition-case */ | |
| 2555 Lisp_Object h; | |
| 2556 | |
| 2557 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2558 { | |
| 2559 Lisp_Object clause = Fcar (h); | |
| 2560 Lisp_Object tem = Fcar (clause); | |
| 2561 | |
| 2562 if (condition_type_p (tem, conditions)) | |
| 2563 { | |
| 853 | 2564 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2565 outer_handlers, 1, |
| 2566 &stack_trace_displayed, | |
| 2567 &debugger_entered); | |
| 2568 UNGCPRO; | |
| 2569 if (!UNBOUNDP (tem)) | |
| 2570 return return_from_signal (tem); | |
| 2571 | |
| 2572 /* Doesn't return */ | |
| 853 | 2573 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause)); |
|
4677
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Aidan Kehoe <kehoea@parhasard.net>
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4657
diff
changeset
|
2574 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2575 } |
| 2576 } | |
| 2577 } | |
| 2578 } | |
| 2579 | |
| 2580 /* If no handler is present now, try to run the debugger, | |
| 2581 and if that fails, throw to top level. | |
| 2582 | |
| 2583 #### The only time that no handler is present is during | |
| 2584 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2585 there is no `top-level' catch. (That's why the |
| 428 | 2586 "bomb-out" hack was added.) |
| 2587 | |
| 853 | 2588 [[#### Fix this horrifitude!]] |
| 2589 | |
| 2590 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2591 | |
| 2592 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2593 &stack_trace_displayed, |
| 2594 &debugger_entered); | |
| 2595 UNGCPRO; | |
| 853 | 2596 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2597 data); /* Doesn't return */ | |
| 2268 | 2598 RETURN_NOT_REACHED (Qnil); |
| 428 | 2599 } |
| 2600 | |
| 2601 /****************** Error functions class 1 ******************/ | |
| 2602 | |
| 2603 /* Class 1: General functions that signal an error. | |
| 2604 These functions take an error type and a list of associated error | |
| 2605 data. */ | |
| 2606 | |
| 853 | 2607 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2608 |
| 2609 /* Signal a non-continuable error. */ | |
| 2610 | |
| 2611 DOESNT_RETURN | |
| 563 | 2612 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2613 { |
| 2614 for (;;) | |
| 2615 Fsignal (sig, data); | |
| 2616 } | |
| 853 | 2617 |
| 2618 #ifdef ERROR_CHECK_CATCH | |
| 2619 | |
| 2620 void | |
| 2621 check_catchlist_sanity (void) | |
| 2622 { | |
| 2623 #if 0 | |
| 2624 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2625 bug! */ | |
| 442 | 2626 struct catchtag *c; |
| 2627 int found_error_tag = 0; | |
| 2628 | |
| 2629 for (c = catchlist; c; c = c->next) | |
| 2630 { | |
| 2631 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2632 { | |
| 2633 found_error_tag = 1; | |
| 2634 break; | |
| 2635 } | |
| 2636 } | |
| 2637 | |
| 2638 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2639 #endif /* vou me tomar no cul */ |
| 2640 } | |
| 2641 | |
| 2642 void | |
| 2643 check_specbind_stack_sanity (void) | |
| 2644 { | |
| 2645 } | |
| 2646 | |
| 2647 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2648 |
| 2649 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2650 according to ERRB. CLASS is the class of warning and should | |
| 2651 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2652 Qresource, etc.). */ | |
| 2653 | |
| 2654 void | |
| 1204 | 2655 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2656 Error_Behavior errb) |
| 428 | 2657 { |
| 2658 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2659 return; | |
| 793 | 2660 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2661 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2662 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2663 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2664 else |
|
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|
2665 signal_error_1 (sig, data); |
| 428 | 2666 } |
| 2667 | |
| 2668 /* Signal a continuable error or display a warning or do nothing, | |
| 2669 according to ERRB. */ | |
| 2670 | |
| 2671 Lisp_Object | |
| 563 | 2672 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2673 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2674 { |
| 2675 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2676 return Qnil; | |
| 793 | 2677 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2678 { | |
| 1204 | 2679 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2680 return Qnil; |
| 2681 } | |
| 428 | 2682 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2683 { | |
| 1204 | 2684 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2685 return Qnil; |
| 2686 } | |
| 2687 else | |
| 2688 return Fsignal (sig, data); | |
| 2689 } | |
| 2690 | |
| 2691 | |
| 2692 /****************** Error functions class 2 ******************/ | |
| 2693 | |
| 563 | 2694 /* Class 2: Signal an error with a string and an associated object. |
| 2695 Normally these functions are used to attach one associated object, | |
| 2696 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2697 than one object, make a list of the objects with Qunbound as the | |
| 2698 first element. (If you have specifically two objects to attach, | |
| 2699 consider using the function in class 3 below.) These functions | |
| 2700 signal an error of a specified type, whose data is one or more | |
| 2701 objects (usually two), a string the related Lisp object(s) | |
| 2702 specified as FROB. */ | |
| 2703 | |
| 2704 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2705 to signal_error_1(). */ | |
| 2706 | |
| 2707 Lisp_Object | |
|
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changeset
|
2708 build_error_data (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2709 { |
| 2710 if (EQ (frob, Qunbound)) | |
| 2711 frob = Qnil; | |
| 2712 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2713 frob = XCDR (frob); | |
| 2714 else | |
| 2715 frob = list1 (frob); | |
| 2716 if (!reason) | |
| 2717 return frob; | |
| 2718 else | |
| 771 | 2719 return Fcons (build_msg_string (reason), frob); |
| 563 | 2720 } |
| 2721 | |
| 2722 DOESNT_RETURN | |
|
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|
2723 signal_error (Lisp_Object type, const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2724 { |
| 2725 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2726 } | |
| 2727 | |
|
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|
2728 /* NOTE NOTE NOTE: If you feel you need signal_ierror() or something |
|
4aebb0131297
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changeset
|
2729 similar when reason is a non-ASCII message, you're probably doing |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
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|
2730 something wrong. When you have an error message from an external |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
Ben Wing <ben@xemacs.org>
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4969
diff
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|
2731 source, you should put the error message as the first item in FROB and |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
Ben Wing <ben@xemacs.org>
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diff
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|
2732 put a string in REASON indicating what you were doing when the error |
|
4aebb0131297
Cleanups/renaming of EXTERNAL_TO_C_STRING and friends
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|
2733 message occurred. Use signal_error_2() for such a case. */ |
|
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|
2734 |
| 563 | 2735 void |
|
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Mule-izing, various fixes related to char * arguments
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diff
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|
2736 maybe_signal_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2737 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2738 Error_Behavior errb) |
| 563 | 2739 { |
| 2740 /* Optimization: */ | |
| 2741 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2742 return; | |
| 1204 | 2743 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2744 } |
| 2745 | |
| 2746 Lisp_Object | |
|
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|
2747 signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2748 Lisp_Object frob) |
| 2749 { | |
| 2750 return Fsignal (type, build_error_data (reason, frob)); | |
| 2751 } | |
| 2752 | |
| 2753 Lisp_Object | |
|
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|
2754 maybe_signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2755 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2756 Error_Behavior errb) |
| 563 | 2757 { |
| 2758 /* Optimization: */ | |
| 2759 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2760 return Qnil; | |
| 2761 return maybe_signal_continuable_error_1 (type, | |
| 2762 build_error_data (reason, frob), | |
| 1204 | 2763 class_, errb); |
| 563 | 2764 } |
| 2765 | |
| 2766 | |
| 2767 /****************** Error functions class 3 ******************/ | |
| 2768 | |
| 2769 /* Class 3: Signal an error with a string and two associated objects. | |
| 2770 These functions signal an error of a specified type, whose data | |
| 2771 is three objects, a string and two related Lisp objects. | |
| 2772 (The equivalent could be accomplished using the class 2 functions, | |
| 2773 but these are more convenient in this particular case.) */ | |
| 2774 | |
| 2775 DOESNT_RETURN | |
|
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diff
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|
2776 signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2777 Lisp_Object frob0, Lisp_Object frob1) |
| 2778 { | |
| 771 | 2779 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2780 frob1)); |
| 2781 } | |
| 2782 | |
| 2783 void | |
|
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diff
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|
2784 maybe_signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2785 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2786 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2787 { |
| 2788 /* Optimization: */ | |
| 2789 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2790 return; | |
| 771 | 2791 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2792 frob1), class_, errb); |
| 563 | 2793 } |
| 2794 | |
| 2795 Lisp_Object | |
|
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Mule-izing, various fixes related to char * arguments
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|
2796 signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2797 Lisp_Object frob0, Lisp_Object frob1) |
| 2798 { | |
| 771 | 2799 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2800 frob1)); |
| 2801 } | |
| 2802 | |
| 2803 Lisp_Object | |
|
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4846
diff
changeset
|
2804 maybe_signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2805 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2806 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2807 { |
| 2808 /* Optimization: */ | |
| 2809 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2810 return Qnil; | |
| 2811 return maybe_signal_continuable_error_1 | |
| 771 | 2812 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2813 class_, errb); |
| 563 | 2814 } |
| 2815 | |
| 2816 | |
| 2817 /****************** Error functions class 4 ******************/ | |
| 2818 | |
| 2819 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2820 These functions signal an error of a specified type, whose data |
| 428 | 2821 is a single string, created using the arguments. */ |
| 2822 | |
| 2823 DOESNT_RETURN | |
|
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diff
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|
2824 signal_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 442 | 2825 { |
| 2826 Lisp_Object obj; | |
| 2827 va_list args; | |
| 2828 | |
| 2829 va_start (args, fmt); | |
|
4952
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
2830 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2831 va_end (args); |
| 2832 | |
| 2833 /* Fsignal GC-protects its args */ | |
| 563 | 2834 signal_error (type, 0, obj); |
| 442 | 2835 } |
| 2836 | |
| 2837 void | |
| 1204 | 2838 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
|
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changeset
|
2839 const Ascbyte *fmt, ...) |
| 442 | 2840 { |
| 2841 Lisp_Object obj; | |
| 2842 va_list args; | |
| 2843 | |
| 2844 /* Optimization: */ | |
| 2845 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2846 return; | |
| 2847 | |
| 2848 va_start (args, fmt); | |
|
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diff
changeset
|
2849 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2850 va_end (args); |
| 2851 | |
| 2852 /* Fsignal GC-protects its args */ | |
| 1204 | 2853 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2854 } |
| 2855 | |
| 2856 Lisp_Object | |
|
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|
2857 signal_continuable_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 428 | 2858 { |
| 2859 Lisp_Object obj; | |
| 2860 va_list args; | |
| 2861 | |
| 2862 va_start (args, fmt); | |
|
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|
2863 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2864 va_end (args); |
| 2865 | |
| 2866 /* Fsignal GC-protects its args */ | |
| 2867 return Fsignal (type, list1 (obj)); | |
| 2868 } | |
| 2869 | |
| 2870 Lisp_Object | |
| 1204 | 2871 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
|
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|
2872 Error_Behavior errb, const Ascbyte *fmt, ...) |
| 442 | 2873 { |
| 2874 Lisp_Object obj; | |
| 2875 va_list args; | |
| 2876 | |
| 2877 /* Optimization: */ | |
| 2878 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2879 return Qnil; | |
| 2880 | |
| 2881 va_start (args, fmt); | |
|
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changeset
|
2882 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2883 va_end (args); |
| 2884 | |
| 2885 /* Fsignal GC-protects its args */ | |
| 1204 | 2886 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2887 } |
| 2888 | |
| 2889 | |
| 2890 /****************** Error functions class 5 ******************/ | |
| 2891 | |
| 563 | 2892 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2893 These functions signal an error of a specified type, whose data |
| 563 | 2894 is a one or more objects, a string (created using the arguments) |
| 2895 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2896 is the same as for class 2.) | |
| 2897 | |
| 2898 There is no need for a class 6 because you can always attach 2 | |
| 2899 objects using class 5 (for FROB, specify a list with three | |
| 2900 elements, the first of which is Qunbound), and these functions are | |
| 2901 not commonly used. | |
| 2902 */ | |
| 442 | 2903 |
| 2904 DOESNT_RETURN | |
|
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|
2905 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const Ascbyte *fmt, |
| 563 | 2906 ...) |
| 442 | 2907 { |
| 2908 Lisp_Object obj; | |
| 2909 va_list args; | |
| 2910 | |
| 2911 va_start (args, fmt); | |
|
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Mule-izing, various fixes related to char * arguments
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|
2912 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2913 va_end (args); |
| 2914 | |
| 2915 /* Fsignal GC-protects its args */ | |
| 563 | 2916 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2917 } |
| 2918 | |
| 2919 void | |
| 563 | 2920 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2921 Lisp_Object class_, Error_Behavior errb, |
|
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|
2922 const Ascbyte *fmt, ...) |
| 442 | 2923 { |
| 2924 Lisp_Object obj; | |
| 2925 va_list args; | |
| 2926 | |
| 2927 /* Optimization: */ | |
| 2928 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2929 return; | |
| 2930 | |
| 2931 va_start (args, fmt); | |
|
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changeset
|
2932 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2933 va_end (args); |
| 2934 | |
| 2935 /* Fsignal GC-protects its args */ | |
| 1204 | 2936 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2937 errb); |
| 428 | 2938 } |
| 2939 | |
| 2940 Lisp_Object | |
| 563 | 2941 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
|
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changeset
|
2942 const Ascbyte *fmt, ...) |
| 428 | 2943 { |
| 2944 Lisp_Object obj; | |
| 2945 va_list args; | |
| 2946 | |
| 2947 va_start (args, fmt); | |
|
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changeset
|
2948 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2949 va_end (args); |
| 2950 | |
| 2951 /* Fsignal GC-protects its args */ | |
| 563 | 2952 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2953 } |
| 2954 | |
| 2955 Lisp_Object | |
| 563 | 2956 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2957 Lisp_Object class_, |
| 578 | 2958 Error_Behavior errb, |
|
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changeset
|
2959 const Ascbyte *fmt, ...) |
| 428 | 2960 { |
| 2961 Lisp_Object obj; | |
| 2962 va_list args; | |
| 2963 | |
| 2964 /* Optimization: */ | |
| 2965 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2966 return Qnil; | |
| 2967 | |
| 2968 va_start (args, fmt); | |
|
4952
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
2969 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2970 va_end (args); |
| 2971 | |
| 2972 /* Fsignal GC-protects its args */ | |
| 563 | 2973 return maybe_signal_continuable_error_1 (type, |
| 2974 Fcons (obj, | |
| 2975 build_error_data (0, frob)), | |
| 1204 | 2976 class_, errb); |
| 428 | 2977 } |
| 2978 | |
| 2979 | |
| 2980 /* This is what the QUIT macro calls to signal a quit */ | |
| 2981 void | |
| 2982 signal_quit (void) | |
| 2983 { | |
| 853 | 2984 /* This function cannot GC. GC is prohibited because most callers do |
| 2985 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2986 --ben */ | |
| 2987 | |
| 2988 int count; | |
| 2989 | |
| 428 | 2990 if (EQ (Vquit_flag, Qcritical)) |
| 2991 debug_on_quit |= 2; /* set critical bit. */ | |
| 2992 Vquit_flag = Qnil; | |
| 853 | 2993 count = begin_gc_forbidden (); |
| 428 | 2994 /* note that this is continuable. */ |
| 2995 Fsignal (Qquit, Qnil); | |
| 853 | 2996 unbind_to (count); |
| 428 | 2997 } |
| 2998 | |
| 2999 | |
| 563 | 3000 /************************ convenience error functions ***********************/ |
| 3001 | |
| 436 | 3002 Lisp_Object |
| 428 | 3003 signal_void_function_error (Lisp_Object function) |
| 3004 { | |
| 436 | 3005 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 3006 } |
| 3007 | |
| 436 | 3008 Lisp_Object |
| 428 | 3009 signal_invalid_function_error (Lisp_Object function) |
| 3010 { | |
| 436 | 3011 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 3012 } |
| 3013 | |
| 436 | 3014 Lisp_Object |
| 428 | 3015 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 3016 { | |
| 436 | 3017 return Fsignal (Qwrong_number_of_arguments, |
| 3018 list2 (function, make_int (nargs))); | |
| 428 | 3019 } |
| 3020 | |
| 3021 /* Used in list traversal macros for efficiency. */ | |
| 436 | 3022 DOESNT_RETURN |
| 428 | 3023 signal_malformed_list_error (Lisp_Object list) |
| 3024 { | |
| 563 | 3025 signal_error (Qmalformed_list, 0, list); |
| 428 | 3026 } |
| 3027 | |
| 436 | 3028 DOESNT_RETURN |
| 428 | 3029 signal_malformed_property_list_error (Lisp_Object list) |
| 3030 { | |
| 563 | 3031 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 3032 } |
| 3033 | |
| 436 | 3034 DOESNT_RETURN |
| 428 | 3035 signal_circular_list_error (Lisp_Object list) |
| 3036 { | |
| 563 | 3037 signal_error (Qcircular_list, 0, list); |
| 428 | 3038 } |
| 3039 | |
| 436 | 3040 DOESNT_RETURN |
| 428 | 3041 signal_circular_property_list_error (Lisp_Object list) |
| 3042 { | |
| 563 | 3043 signal_error (Qcircular_property_list, 0, list); |
| 428 | 3044 } |
| 442 | 3045 |
| 2267 | 3046 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 3047 DOESNT_RETURN |
|
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Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
3048 syntax_error (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3049 { |
| 563 | 3050 signal_error (Qsyntax_error, reason, frob); |
| 442 | 3051 } |
| 3052 | |
| 3053 DOESNT_RETURN | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3054 syntax_error_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3055 { |
| 563 | 3056 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 3057 } | |
| 3058 | |
| 3059 void | |
|
4952
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
3060 maybe_syntax_error (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3061 Lisp_Object class_, Error_Behavior errb) |
| 3062 { | |
| 3063 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3064 } |
| 3065 | |
| 3066 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3067 sferror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3068 { |
| 3069 signal_error (Qstructure_formation_error, reason, frob); | |
| 3070 } | |
| 3071 | |
| 3072 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3073 sferror_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3074 { |
| 3075 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3076 } | |
| 3077 | |
| 3078 void | |
|
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
3079 maybe_sferror (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3080 Lisp_Object class_, Error_Behavior errb) |
| 3081 { | |
| 3082 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3083 } |
| 3084 | |
| 3085 DOESNT_RETURN | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
3086 invalid_argument (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3087 { |
| 563 | 3088 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3089 } |
| 3090 | |
| 3091 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3092 invalid_argument_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3093 Lisp_Object frob2) |
| 442 | 3094 { |
| 563 | 3095 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3096 } | |
| 3097 | |
| 3098 void | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3099 maybe_invalid_argument (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3100 Lisp_Object class_, Error_Behavior errb) |
| 3101 { | |
| 3102 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3103 } |
| 3104 | |
| 3105 DOESNT_RETURN | |
|
5084
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3106 invalid_keyword_argument (Lisp_Object function, Lisp_Object keyword) |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3107 { |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3108 signal_error_1 (Qinvalid_keyword_argument, list2 (function, keyword)); |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3109 } |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3110 |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
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5050
diff
changeset
|
3111 DOESNT_RETURN |
|
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
3112 invalid_constant (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3113 { |
| 3114 signal_error (Qinvalid_constant, reason, frob); | |
| 3115 } | |
| 3116 | |
| 3117 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3118 invalid_constant_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3119 Lisp_Object frob2) |
| 563 | 3120 { |
| 3121 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3122 } | |
| 3123 | |
| 3124 void | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3125 maybe_invalid_constant (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3126 Lisp_Object class_, Error_Behavior errb) |
| 3127 { | |
| 3128 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3129 } |
| 3130 | |
| 3131 DOESNT_RETURN | |
|
4952
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3132 invalid_operation (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3133 { |
| 563 | 3134 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3135 } |
| 3136 | |
| 3137 DOESNT_RETURN | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
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4846
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changeset
|
3138 invalid_operation_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3139 Lisp_Object frob2) |
| 442 | 3140 { |
| 563 | 3141 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3142 } | |
| 3143 | |
| 3144 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3145 maybe_invalid_operation (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3146 Lisp_Object class_, Error_Behavior errb) |
| 3147 { | |
| 3148 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3149 } |
| 3150 | |
| 3151 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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changeset
|
3152 invalid_change (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3153 { |
| 563 | 3154 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3155 } |
| 3156 | |
| 3157 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
3158 invalid_change_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3159 { |
| 563 | 3160 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3161 } | |
| 3162 | |
| 3163 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3164 maybe_invalid_change (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3165 Lisp_Object class_, Error_Behavior errb) |
| 3166 { | |
| 3167 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3168 } |
| 3169 | |
| 3170 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3171 invalid_state (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3172 { |
| 3173 signal_error (Qinvalid_state, reason, frob); | |
| 3174 } | |
| 3175 | |
| 3176 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3177 invalid_state_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3178 { |
| 3179 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3180 } | |
| 3181 | |
| 3182 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3183 maybe_invalid_state (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3184 Lisp_Object class_, Error_Behavior errb) |
| 3185 { | |
| 3186 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3187 } |
| 3188 | |
| 3189 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3190 wtaerror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3191 { |
| 3192 signal_error (Qwrong_type_argument, reason, frob); | |
| 3193 } | |
| 3194 | |
| 3195 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3196 stack_overflow (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3197 { |
| 3198 signal_error (Qstack_overflow, reason, frob); | |
| 3199 } | |
| 3200 | |
| 3201 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3202 out_of_memory (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3203 { |
| 3204 signal_error (Qout_of_memory, reason, frob); | |
| 3205 } | |
| 3206 | |
| 428 | 3207 |
| 3208 /************************************************************************/ | |
| 3209 /* User commands */ | |
| 3210 /************************************************************************/ | |
| 3211 | |
| 3212 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3213 Return t if FUNCTION makes provisions for interactive calling. | |
| 3214 This means it contains a description for how to read arguments to give it. | |
| 3215 The value is nil for an invalid function or a symbol with no function | |
| 3216 definition. | |
| 3217 | |
| 3218 Interactively callable functions include | |
| 3219 | |
| 3220 -- strings and vectors (treated as keyboard macros) | |
| 3221 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3222 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3223 (i.e. the interactive flag) | |
| 3224 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3225 value | |
| 3226 -- subrs (built-in functions) that are interactively callable | |
| 3227 | |
| 3228 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3229 */ | |
| 3230 (function)) | |
| 3231 { | |
| 3232 Lisp_Object fun = indirect_function (function, 0); | |
| 3233 | |
| 3234 if (COMPILED_FUNCTIONP (fun)) | |
| 3235 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3236 | |
| 3237 /* Lists may represent commands. */ | |
| 3238 if (CONSP (fun)) | |
| 3239 { | |
| 3240 Lisp_Object funcar = XCAR (fun); | |
| 3241 if (EQ (funcar, Qlambda)) | |
| 3242 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3243 if (EQ (funcar, Qautoload)) | |
| 3244 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3245 else | |
| 3246 return Qnil; | |
| 3247 } | |
| 3248 | |
| 3249 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3250 interactive spec. */ | |
| 3251 if (SUBRP (fun)) | |
| 3252 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3253 | |
| 3254 /* Strings and vectors are keyboard macros. */ | |
| 3255 if (VECTORP (fun) || STRINGP (fun)) | |
| 3256 return Qt; | |
| 3257 | |
| 3258 /* Everything else (including Qunbound) is not a command. */ | |
| 3259 return Qnil; | |
| 3260 } | |
| 3261 | |
| 3262 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3263 Execute CMD as an editor command. | |
| 3264 CMD must be an object that satisfies the `commandp' predicate. | |
| 3265 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3266 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3267 when reading the arguments. | |
| 3268 */ | |
| 444 | 3269 (cmd, record_flag, keys)) |
| 428 | 3270 { |
| 3271 /* This function can GC */ | |
| 3272 Lisp_Object prefixarg; | |
| 3273 Lisp_Object final = cmd; | |
| 4162 | 3274 PROFILE_DECLARE(); |
| 428 | 3275 struct console *con = XCONSOLE (Vselected_console); |
| 3276 | |
| 3277 prefixarg = con->prefix_arg; | |
| 3278 con->prefix_arg = Qnil; | |
| 3279 Vcurrent_prefix_arg = prefixarg; | |
| 3280 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3281 | |
| 3282 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3283 return run_hook (Qdisabled_command_hook); |
| 428 | 3284 |
| 3285 for (;;) | |
| 3286 { | |
| 3287 final = indirect_function (cmd, 1); | |
| 3288 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3289 { |
| 3290 /* do_autoload GCPROs both arguments */ | |
| 3291 do_autoload (final, cmd); | |
| 3292 } | |
| 428 | 3293 else |
| 3294 break; | |
| 3295 } | |
| 3296 | |
| 3297 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3298 { | |
| 3299 backtrace.function = &Qcall_interactively; | |
| 3300 backtrace.args = &cmd; | |
| 3301 backtrace.nargs = 1; | |
| 3302 backtrace.evalargs = 0; | |
| 1292 | 3303 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3304 backtrace.debug_on_exit = 0; |
| 1292 | 3305 backtrace.function_being_called = 0; |
| 428 | 3306 PUSH_BACKTRACE (backtrace); |
| 3307 | |
| 1292 | 3308 PROFILE_ENTER_FUNCTION (); |
| 444 | 3309 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3310 PROFILE_EXIT_FUNCTION (); |
| 428 | 3311 |
| 3312 POP_BACKTRACE (backtrace); | |
| 3313 return final; | |
| 3314 } | |
| 3315 else if (STRINGP (final) || VECTORP (final)) | |
| 3316 { | |
| 3317 return Fexecute_kbd_macro (final, prefixarg); | |
| 3318 } | |
| 3319 else | |
| 3320 { | |
| 3321 Fsignal (Qwrong_type_argument, | |
| 3322 Fcons (Qcommandp, | |
| 3323 (EQ (cmd, final) | |
| 3324 ? list1 (cmd) | |
| 3325 : list2 (cmd, final)))); | |
| 3326 return Qnil; | |
| 3327 } | |
| 3328 } | |
| 3329 | |
| 3330 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3331 Return t if function in which this appears was called interactively. | |
| 3332 This means that the function was called with call-interactively (which | |
| 3333 includes being called as the binding of a key) | |
| 3334 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3335 */ | |
| 3336 ()) | |
| 3337 { | |
| 3338 REGISTER struct backtrace *btp; | |
| 3339 REGISTER Lisp_Object fun; | |
| 3340 | |
| 3341 if (!INTERACTIVE) | |
| 3342 return Qnil; | |
| 3343 | |
| 3344 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3345 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3346 function). Note that *btp->function may be a symbol pointing at a | |
| 3347 compiled function. */ | |
| 3348 btp = backtrace_list; | |
| 3349 | |
| 3350 #if 0 /* FSFmacs */ | |
| 3351 | |
| 3352 /* #### FSFmacs does the following instead. I can't figure | |
| 3353 out which one is more correct. */ | |
| 3354 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3355 the top for Finteractive_p itself. If so, skip it. */ | |
| 3356 fun = Findirect_function (*btp->function); | |
| 3357 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3358 btp = btp->next; | |
| 3359 | |
| 3360 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3361 may be a frame for Fbyte_code. Now, given the strictest | |
| 3362 definition, this function isn't really being called | |
| 3363 interactively, but because that's the way Emacs 18 always builds | |
| 3364 byte-compiled functions, we'll accept it for now. */ | |
| 3365 if (EQ (*btp->function, Qbyte_code)) | |
| 3366 btp = btp->next; | |
| 3367 | |
| 3368 /* If this isn't a byte-compiled function, then we may now be | |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
3369 looking at several frames for special operators. Skip past them. */ |
| 428 | 3370 while (btp && |
| 3371 btp->nargs == UNEVALLED) | |
| 3372 btp = btp->next; | |
| 3373 | |
| 3374 #else | |
| 3375 | |
| 3376 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3377 btp = btp->next; | |
| 3378 for (; | |
| 3379 btp && (btp->nargs == UNEVALLED | |
| 3380 || EQ (*btp->function, Qbyte_code)); | |
| 3381 btp = btp->next) | |
| 3382 {} | |
| 3383 /* btp now points at the frame of the innermost function | |
| 3384 that DOES eval its args. | |
| 3385 If it is a built-in function (such as load or eval-region) | |
| 3386 return nil. */ | |
| 3387 /* Beats me why this is necessary, but it is */ | |
| 3388 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3389 return Qt; | |
| 3390 | |
| 3391 #endif | |
| 3392 | |
| 3393 fun = Findirect_function (*btp->function); | |
| 3394 if (SUBRP (fun)) | |
| 3395 return Qnil; | |
| 3396 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3397 Return t if that function was called interactively. */ | |
| 3398 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3399 return Qt; | |
| 3400 return Qnil; | |
| 3401 } | |
| 3402 | |
| 3403 | |
| 3404 /************************************************************************/ | |
| 3405 /* Autoloading */ | |
| 3406 /************************************************************************/ | |
| 3407 | |
| 3408 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3409 Define FUNCTION to autoload from FILENAME. |
| 3410 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3411 The remaining optional arguments provide additional info about the | |
| 3412 real definition. | |
| 3413 DOCSTRING is documentation for FUNCTION. | |
| 3414 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3415 TYPE indicates the type of the object: | |
| 428 | 3416 nil or omitted says FUNCTION is a function, |
| 3417 `keymap' says FUNCTION is really a keymap, and | |
| 3418 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3419 If FUNCTION already has a non-void function definition that is not an |
| 3420 autoload object, this function does nothing and returns nil. | |
| 428 | 3421 */ |
| 444 | 3422 (function, filename, docstring, interactive, type)) |
| 428 | 3423 { |
| 3424 /* This function can GC */ | |
| 3425 CHECK_SYMBOL (function); | |
| 444 | 3426 CHECK_STRING (filename); |
| 428 | 3427 |
| 3428 /* If function is defined and not as an autoload, don't override */ | |
| 3429 { | |
| 3430 Lisp_Object f = XSYMBOL (function)->function; | |
| 3431 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3432 return Qnil; | |
| 3433 } | |
| 3434 | |
| 3435 if (purify_flag) | |
| 3436 { | |
| 3437 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3438 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3439 } |
| 440 | 3440 |
| 444 | 3441 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3442 docstring, |
| 3443 interactive, | |
| 3444 type))); | |
| 3445 } | |
| 3446 | |
| 3447 Lisp_Object | |
| 3448 un_autoload (Lisp_Object oldqueue) | |
| 3449 { | |
| 3450 /* This function can GC */ | |
| 3451 REGISTER Lisp_Object queue, first, second; | |
| 3452 | |
| 3453 /* Queue to unwind is current value of Vautoload_queue. | |
| 3454 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3455 queue = Vautoload_queue; | |
| 3456 Vautoload_queue = oldqueue; | |
| 3457 while (CONSP (queue)) | |
| 3458 { | |
| 3459 first = XCAR (queue); | |
| 3460 second = Fcdr (first); | |
| 3461 first = Fcar (first); | |
| 3462 if (NILP (second)) | |
| 3463 Vfeatures = first; | |
| 3464 else | |
| 3465 Ffset (first, second); | |
| 3466 queue = Fcdr (queue); | |
| 3467 } | |
| 3468 return Qnil; | |
| 3469 } | |
| 3470 | |
| 970 | 3471 /* do_autoload GCPROs both arguments */ |
| 428 | 3472 void |
| 3473 do_autoload (Lisp_Object fundef, | |
| 3474 Lisp_Object funname) | |
| 3475 { | |
| 3476 /* This function can GC */ | |
| 3477 int speccount = specpdl_depth(); | |
| 3478 Lisp_Object fun = funname; | |
| 970 | 3479 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3480 |
| 3481 CHECK_SYMBOL (funname); | |
| 970 | 3482 GCPRO3 (fundef, funname, fun); |
| 428 | 3483 |
| 3484 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3485 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3486 Vautoload_queue = Qt; | |
| 3487 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3488 | |
| 3489 { | |
| 3490 Lisp_Object queue; | |
| 3491 | |
| 3492 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3493 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3494 { | |
| 3495 Lisp_Object first = XCAR (queue); | |
| 3496 Lisp_Object second = Fcdr (first); | |
| 3497 | |
| 3498 first = Fcar (first); | |
| 3499 | |
| 3500 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3501 may be an atom if the autoload entry was generated by a defalias | |
| 3502 or fset. */ | |
| 3503 if (CONSP (second)) | |
| 3504 Fput (first, Qautoload, (XCDR (second))); | |
| 3505 } | |
| 3506 } | |
| 3507 | |
| 3508 /* Once loading finishes, don't undo it. */ | |
| 3509 Vautoload_queue = Qt; | |
| 771 | 3510 unbind_to (speccount); |
| 428 | 3511 |
| 3512 fun = indirect_function (fun, 0); | |
| 3513 | |
| 3514 #if 0 /* FSFmacs */ | |
| 3515 if (!NILP (Fequal (fun, fundef))) | |
| 3516 #else | |
| 3517 if (UNBOUNDP (fun) | |
| 3518 || (CONSP (fun) | |
| 3519 && EQ (XCAR (fun), Qautoload))) | |
| 3520 #endif | |
| 563 | 3521 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3522 UNGCPRO; |
| 3523 } | |
| 3524 | |
| 3525 | |
| 3526 /************************************************************************/ | |
| 3527 /* eval, funcall, apply */ | |
| 3528 /************************************************************************/ | |
| 3529 | |
| 814 | 3530 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3531 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3532 -- in particular, the calling of subrs and compiled functions, the most | |
| 3533 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3534 to do to squeeze more speed out except by switching to lexical | |
| 3535 variables, which would eliminate the specbind loop. (But the real gain | |
| 3536 from lexical variables would come from better optimization -- with | |
| 3537 dynamic binding, you have the constant problem that any function call | |
| 3538 that you haven't explicitly proven to be side-effect-free might | |
| 3539 potentially side effect your local variables, which makes optimization | |
| 3540 extremely difficult when there are function calls anywhere in a chunk of | |
| 3541 code to be optimized. Even worse, you don't know that *your* local | |
| 3542 variables aren't side-effecting an outer function's local variables, so | |
| 3543 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3544 | |
| 428 | 3545 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3546 int nargs, Lisp_Object args[]); |
| 428 | 3547 static int in_warnings; |
| 3548 | |
| 3549 | |
| 814 | 3550 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3551 int nargs, | |
| 3552 Lisp_Object args[]); | |
| 3553 | |
| 3554 /* The theory behind making this a separate function is to shrink | |
| 3555 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3556 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3557 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3558 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3559 | |
| 3560 void | |
| 3561 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3562 Lisp_Object args[]) | |
| 3563 { | |
| 3564 REGISTER int i = 0; | |
| 3565 int max_non_rest_args = f->args_in_array - 1; | |
| 3566 int bindargs = min (nargs, max_non_rest_args); | |
| 3567 | |
| 3568 for (i = 0; i < bindargs; i++) | |
| 3092 | 3569 #ifdef NEW_GC |
| 3570 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3571 args[i]); | |
| 3572 #else /* not NEW_GC */ | |
| 814 | 3573 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3574 #endif /* not NEW_GC */ |
| 814 | 3575 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3576 #ifdef NEW_GC |
| 3577 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3578 Qnil); | |
| 3579 #else /* not NEW_GC */ | |
| 814 | 3580 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3581 #endif /* not NEW_GC */ |
| 3582 #ifdef NEW_GC | |
| 3583 SPECBIND_FAST_UNSAFE | |
| 3584 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3585 nargs > max_non_rest_args ? | |
| 3586 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3587 Qnil); | |
| 3588 #else /* not NEW_GC */ | |
| 814 | 3589 SPECBIND_FAST_UNSAFE |
| 3590 (f->args[max_non_rest_args], | |
| 3591 nargs > max_non_rest_args ? | |
| 3592 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3593 Qnil); | |
| 3092 | 3594 #endif /* not NEW_GC */ |
| 814 | 3595 } |
| 3596 | |
| 3597 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3598 in ARGS, and return the result of evaluation. */ | |
| 3599 inline static Lisp_Object | |
| 3600 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3601 { | |
| 3602 /* This function can GC */ | |
| 3603 int speccount = specpdl_depth(); | |
| 3604 REGISTER int i = 0; | |
| 3605 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3606 | |
| 3607 if (!OPAQUEP (f->instructions)) | |
| 3608 /* Lazily munge the instructions into a more efficient form */ | |
| 3609 optimize_compiled_function (fun); | |
| 3610 | |
| 3611 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3612 the required space on the specbinding stack for binding the args | |
| 3613 and local variables of fun. So just reserve it once. */ | |
| 3614 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3615 | |
| 3616 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3617 optional arguments. */ | |
| 3618 { | |
| 3619 #if 1 | |
| 3620 for (i = 0; i < nargs; i++) | |
| 3092 | 3621 #ifdef NEW_GC |
| 3622 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3623 args[i]); | |
| 3624 #else /* not NEW_GC */ | |
| 814 | 3625 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3626 #endif /* not NEW_GC */ |
| 814 | 3627 #else |
| 3628 /* Here's an alternate way to write the loop that tries to further | |
| 3629 optimize funcalls for functions with few arguments by partially | |
| 3630 unrolling the loop. It's not clear whether this is a win since it | |
| 3631 increases the size of the function and the possibility of L1 cache | |
| 3632 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3633 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3634 compiler repeatedly and looking at the total time, show very | |
| 3635 little difference between the simple loop above, the unrolled code | |
| 3636 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3637 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3638 because it's smaller. */ | |
| 3639 switch (nargs) | |
| 3640 { | |
| 3641 default: | |
| 3642 for (i = nargs - 1; i >= 4; i--) | |
| 3643 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3644 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3645 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3646 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3647 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3648 case 0: break; | |
| 3649 } | |
| 3650 #endif | |
| 3651 } | |
| 3652 else if (nargs < f->min_args) | |
| 3653 goto wrong_number_of_arguments; | |
| 3654 else if (nargs < f->max_args) | |
| 3655 { | |
| 3656 for (i = 0; i < nargs; i++) | |
| 3092 | 3657 #ifdef NEW_GC |
| 3658 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3659 args[i]); | |
| 3660 #else /* not NEW_GC */ | |
| 814 | 3661 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3662 #endif /* not NEW_GC */ |
| 814 | 3663 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3664 #ifdef NEW_GC |
| 3665 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3666 Qnil); | |
| 3667 #else /* not NEW_GC */ | |
| 814 | 3668 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3669 #endif /* not NEW_GC */ |
| 814 | 3670 } |
| 3671 else if (f->max_args == MANY) | |
| 3672 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3673 else | |
| 3674 { | |
| 3675 wrong_number_of_arguments: | |
| 3676 /* The actual printed compiled_function object is incomprehensible. | |
| 3677 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3678 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3679 fun = *backtrace_list->function; | |
| 3680 return Fsignal (Qwrong_number_of_arguments, | |
| 3681 list2 (fun, make_int (nargs))); | |
| 3682 } | |
| 3683 | |
| 3684 { | |
| 3685 Lisp_Object value = | |
| 3686 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions), | |
|
4921
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3687 #ifdef ERROR_CHECK_BYTE_CODE |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3688 XOPAQUE_SIZE (f->instructions) / |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3689 sizeof (Opbyte), |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3690 #endif |
| 814 | 3691 f->stack_depth, |
| 3692 XVECTOR_DATA (f->constants)); | |
| 3693 | |
| 3694 /* The attempt to optimize this by only unbinding variables failed | |
| 3695 because using buffer-local variables as function parameters | |
| 3696 leads to specpdl_ptr->func != 0 */ | |
| 3697 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3698 UNBIND_TO_GCPRO (speccount, value); | |
| 3699 return value; | |
| 3700 } | |
| 3701 } | |
| 3702 | |
| 428 | 3703 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3704 Evaluate FORM and return its value. | |
| 3705 */ | |
| 3706 (form)) | |
| 3707 { | |
| 3708 /* This function can GC */ | |
| 3709 Lisp_Object fun, val, original_fun, original_args; | |
| 3710 int nargs; | |
| 4162 | 3711 PROFILE_DECLARE(); |
| 428 | 3712 |
| 1318 | 3713 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3714 check_proper_critical_section_lisp_protection (); | |
| 3715 #endif | |
| 3716 | |
| 3989 | 3717 if (!CONSP (form)) |
| 3718 { | |
| 3719 if (SYMBOLP (form)) | |
| 3720 { | |
| 3721 return Fsymbol_value (form); | |
| 3722 } | |
| 3723 | |
| 3724 return form; | |
| 3725 } | |
| 3726 | |
| 428 | 3727 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3728 while (!in_warnings && !NILP (Vpending_warnings) |
| 3729 /* well, perhaps not so safe after all! */ | |
| 3730 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3731 { |
| 3732 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3733 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3734 int speccount = internal_bind_int (&in_warnings, 1); |
| 3735 | |
| 428 | 3736 this_warning_cons = Vpending_warnings; |
| 3737 this_warning = XCAR (this_warning_cons); | |
| 3738 /* in case an error occurs in the warn function, at least | |
| 3739 it won't happen infinitely */ | |
| 3740 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3741 free_cons (this_warning_cons); |
| 1204 | 3742 class_ = XCAR (this_warning); |
| 428 | 3743 level = XCAR (XCDR (this_warning)); |
| 3744 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3745 free_list (this_warning); | |
| 3746 | |
| 3747 if (NILP (Vpending_warnings)) | |
| 3748 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3749 but safer */ | |
| 3750 | |
| 1204 | 3751 GCPRO4 (form, class_, level, messij); |
| 428 | 3752 if (!STRINGP (messij)) |
| 3753 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3754 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3755 UNGCPRO; |
| 771 | 3756 unbind_to (speccount); |
| 428 | 3757 } |
| 3758 | |
| 3759 QUIT; | |
| 814 | 3760 if (need_to_garbage_collect) |
| 428 | 3761 { |
| 3762 struct gcpro gcpro1; | |
| 3763 GCPRO1 (form); | |
| 3092 | 3764 #ifdef NEW_GC |
| 3765 gc_incremental (); | |
| 3766 #else /* not NEW_GC */ | |
| 428 | 3767 garbage_collect_1 (); |
| 3092 | 3768 #endif /* not NEW_GC */ |
| 428 | 3769 UNGCPRO; |
| 3770 } | |
| 3771 | |
| 3772 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3773 { | |
| 3774 if (max_lisp_eval_depth < 100) | |
| 3775 max_lisp_eval_depth = 100; | |
| 3776 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3777 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3778 Qunbound); | |
| 428 | 3779 } |
| 3780 | |
| 3781 /* We guaranteed CONSP (form) above */ | |
| 3782 original_fun = XCAR (form); | |
| 3783 original_args = XCDR (form); | |
| 3784 | |
| 3785 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3786 | |
| 3787 backtrace.pdlcount = specpdl_depth(); | |
| 3788 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3789 backtrace.args = &original_args; | |
| 3790 backtrace.nargs = UNEVALLED; | |
| 3791 backtrace.evalargs = 1; | |
| 3792 backtrace.debug_on_exit = 0; | |
| 1292 | 3793 backtrace.function_being_called = 0; |
| 428 | 3794 PUSH_BACKTRACE (backtrace); |
| 3795 | |
| 3796 if (debug_on_next_call) | |
| 3797 do_debug_on_call (Qt); | |
| 3798 | |
| 3799 /* At this point, only original_fun and original_args | |
| 3800 have values that will be used below. */ | |
| 3801 retry: | |
| 3989 | 3802 /* Optimise for no indirection. */ |
| 3803 fun = original_fun; | |
| 3804 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3805 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3806 { | |
| 3807 fun = indirect_function(original_fun, 1); | |
| 3808 } | |
| 428 | 3809 |
| 3810 if (SUBRP (fun)) | |
| 3811 { | |
| 3812 Lisp_Subr *subr = XSUBR (fun); | |
| 3813 int max_args = subr->max_args; | |
| 3814 | |
| 3815 if (nargs < subr->min_args) | |
| 3816 goto wrong_number_of_arguments; | |
| 3817 | |
| 3818 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3819 { | |
| 3820 backtrace.evalargs = 0; | |
| 1292 | 3821 PROFILE_ENTER_FUNCTION (); |
| 428 | 3822 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3823 (original_args)); | |
| 1292 | 3824 PROFILE_EXIT_FUNCTION (); |
| 428 | 3825 } |
| 3826 else if (nargs <= max_args) | |
| 3827 { | |
| 3828 struct gcpro gcpro1; | |
| 3829 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3830 REGISTER Lisp_Object *p = args; | |
| 3831 | |
| 3832 GCPRO1 (args[0]); | |
| 3833 gcpro1.nvars = 0; | |
| 3834 | |
| 3835 { | |
| 3836 LIST_LOOP_2 (arg, original_args) | |
| 3837 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3838 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3839 gcpro1.nvars++; |
| 3840 } | |
| 3841 } | |
| 3842 | |
| 3843 /* &optional args default to nil. */ | |
| 3844 while (p - args < max_args) | |
| 3845 *p++ = Qnil; | |
| 3846 | |
| 3847 backtrace.args = args; | |
| 3848 backtrace.nargs = nargs; | |
| 3849 | |
| 1292 | 3850 PROFILE_ENTER_FUNCTION (); |
| 428 | 3851 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3852 PROFILE_EXIT_FUNCTION (); |
| 428 | 3853 |
| 3854 UNGCPRO; | |
| 3855 } | |
| 3856 else if (max_args == MANY) | |
| 3857 { | |
| 3858 /* Pass a vector of evaluated arguments */ | |
| 3859 struct gcpro gcpro1; | |
| 3860 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3861 REGISTER Lisp_Object *p = args; | |
| 3862 | |
| 3863 GCPRO1 (args[0]); | |
| 3864 gcpro1.nvars = 0; | |
| 3865 | |
| 3866 { | |
| 3867 LIST_LOOP_2 (arg, original_args) | |
| 3868 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3869 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3870 gcpro1.nvars++; |
| 3871 } | |
| 3872 } | |
| 3873 | |
| 3874 backtrace.args = args; | |
| 3875 backtrace.nargs = nargs; | |
| 3876 | |
| 1292 | 3877 PROFILE_ENTER_FUNCTION (); |
| 428 | 3878 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3879 (nargs, args)); | |
| 1292 | 3880 PROFILE_EXIT_FUNCTION (); |
| 428 | 3881 |
| 3882 UNGCPRO; | |
| 3883 } | |
| 3884 else | |
| 3885 { | |
| 3886 wrong_number_of_arguments: | |
| 440 | 3887 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3888 } |
| 3889 } | |
| 3890 else if (COMPILED_FUNCTIONP (fun)) | |
| 3891 { | |
| 3892 struct gcpro gcpro1; | |
| 3893 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3894 REGISTER Lisp_Object *p = args; | |
| 3895 | |
| 3896 GCPRO1 (args[0]); | |
| 3897 gcpro1.nvars = 0; | |
| 3898 | |
| 3899 { | |
| 3900 LIST_LOOP_2 (arg, original_args) | |
| 3901 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3902 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3903 gcpro1.nvars++; |
| 3904 } | |
| 3905 } | |
| 3906 | |
| 3907 backtrace.args = args; | |
| 3908 backtrace.nargs = nargs; | |
| 3909 backtrace.evalargs = 0; | |
| 3910 | |
| 1292 | 3911 PROFILE_ENTER_FUNCTION (); |
| 428 | 3912 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3913 PROFILE_EXIT_FUNCTION (); |
| 428 | 3914 |
| 3915 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3916 if (backtrace.debug_on_exit) | |
| 3917 val = do_debug_on_exit (val); | |
| 3918 /* Don't do it again when we return to eval. */ | |
| 3919 backtrace.debug_on_exit = 0; | |
| 3920 | |
| 3921 UNGCPRO; | |
| 3922 } | |
| 3923 else if (CONSP (fun)) | |
| 3924 { | |
| 3925 Lisp_Object funcar = XCAR (fun); | |
| 3926 | |
| 3927 if (EQ (funcar, Qautoload)) | |
| 3928 { | |
| 970 | 3929 /* do_autoload GCPROs both arguments */ |
| 428 | 3930 do_autoload (fun, original_fun); |
| 3931 goto retry; | |
| 3932 } | |
| 3933 else if (EQ (funcar, Qmacro)) | |
| 3934 { | |
| 1292 | 3935 PROFILE_ENTER_FUNCTION (); |
| 428 | 3936 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3937 PROFILE_EXIT_FUNCTION (); |
| 428 | 3938 } |
| 3939 else if (EQ (funcar, Qlambda)) | |
| 3940 { | |
| 3941 struct gcpro gcpro1; | |
| 3942 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3943 REGISTER Lisp_Object *p = args; | |
| 3944 | |
| 3945 GCPRO1 (args[0]); | |
| 3946 gcpro1.nvars = 0; | |
| 3947 | |
| 3948 { | |
| 3949 LIST_LOOP_2 (arg, original_args) | |
| 3950 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3951 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3952 gcpro1.nvars++; |
| 3953 } | |
| 3954 } | |
| 3955 | |
| 3956 UNGCPRO; | |
| 3957 | |
| 3958 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3959 backtrace.nargs = nargs; | |
| 3960 backtrace.evalargs = 0; | |
| 3961 | |
| 1292 | 3962 PROFILE_ENTER_FUNCTION (); |
| 428 | 3963 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3964 PROFILE_EXIT_FUNCTION (); |
| 428 | 3965 |
| 3966 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3967 if (backtrace.debug_on_exit) | |
| 3968 val = do_debug_on_exit (val); | |
| 3969 /* Don't do it again when we return to eval. */ | |
| 3970 backtrace.debug_on_exit = 0; | |
| 3971 } | |
| 3972 else | |
| 3973 { | |
| 3974 goto invalid_function; | |
| 3975 } | |
| 3976 } | |
| 4104 | 3977 else if (UNBOUNDP (fun)) |
| 3978 { | |
| 3979 val = signal_void_function_error (original_fun); | |
| 3980 } | |
| 3981 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3982 UNBOUNDP (fun)) */ | |
| 428 | 3983 { |
| 3984 invalid_function: | |
| 436 | 3985 val = signal_invalid_function_error (fun); |
| 428 | 3986 } |
| 3987 | |
| 3988 lisp_eval_depth--; | |
| 3989 if (backtrace.debug_on_exit) | |
| 3990 val = do_debug_on_exit (val); | |
| 3991 POP_BACKTRACE (backtrace); | |
| 3992 return val; | |
| 3993 } | |
| 3994 | |
| 3995 | |
| 1111 | 3996 |
| 3997 static void | |
| 3998 run_post_gc_hook (void) | |
| 3999 { | |
| 4000 Lisp_Object args[2]; | |
| 4001 | |
| 4002 args[0] = Qpost_gc_hook; | |
| 4003 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 4004 | |
| 4005 run_hook_with_args_trapping_problems | |
| 1333 | 4006 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 4007 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 4008 } | |
| 4009 | |
| 428 | 4010 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /* |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4011 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 4012 Thus, (funcall 'cons 'x 'y) returns (x . y). |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4013 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4014 arguments: (FUNCTION &rest ARGS) |
| 428 | 4015 */ |
| 4016 (int nargs, Lisp_Object *args)) | |
| 4017 { | |
| 4018 /* This function can GC */ | |
| 4019 Lisp_Object fun; | |
| 4020 Lisp_Object val; | |
| 4162 | 4021 PROFILE_DECLARE(); |
| 428 | 4022 int fun_nargs = nargs - 1; |
| 4023 Lisp_Object *fun_args = args + 1; | |
| 4024 | |
| 1318 | 4025 /* QUIT will check for proper redisplay wrapping */ |
| 4026 | |
| 428 | 4027 QUIT; |
| 851 | 4028 |
| 4029 if (funcall_allocation_flag) | |
| 4030 { | |
| 4031 if (need_to_garbage_collect) | |
| 4032 /* Callers should gcpro lexpr args */ | |
| 3092 | 4033 #ifdef NEW_GC |
| 4034 gc_incremental (); | |
| 4035 #else /* not NEW_GC */ | |
| 851 | 4036 garbage_collect_1 (); |
| 3092 | 4037 #endif /* not NEW_GC */ |
| 851 | 4038 if (need_to_check_c_alloca) |
| 4039 { | |
| 4040 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 4041 { | |
| 4042 xemacs_c_alloca (0); | |
| 4043 funcall_alloca_count = 0; | |
| 4044 } | |
| 4045 } | |
| 887 | 4046 if (need_to_signal_post_gc) |
| 4047 { | |
| 4048 need_to_signal_post_gc = 0; | |
| 1111 | 4049 recompute_funcall_allocation_flag (); |
| 3263 | 4050 #ifdef NEW_GC |
| 4051 run_finalizers (); | |
| 4052 #endif /* NEW_GC */ | |
| 1111 | 4053 run_post_gc_hook (); |
| 887 | 4054 } |
| 851 | 4055 } |
| 428 | 4056 |
| 4057 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 4058 { | |
| 4059 if (max_lisp_eval_depth < 100) | |
| 4060 max_lisp_eval_depth = 100; | |
| 4061 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 4062 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 4063 Qunbound); | |
| 428 | 4064 } |
| 4065 | |
| 1292 | 4066 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4067 backtrace.function = &args[0]; |
| 4068 backtrace.args = fun_args; | |
| 4069 backtrace.nargs = fun_nargs; | |
| 4070 backtrace.evalargs = 0; | |
| 4071 backtrace.debug_on_exit = 0; | |
| 1292 | 4072 backtrace.function_being_called = 0; |
| 428 | 4073 PUSH_BACKTRACE (backtrace); |
| 4074 | |
| 4075 if (debug_on_next_call) | |
| 4076 do_debug_on_call (Qlambda); | |
| 4077 | |
| 4078 retry: | |
| 4079 | |
| 4080 fun = args[0]; | |
| 4081 | |
| 4082 /* We could call indirect_function directly, but profiling shows | |
| 4083 this is worth optimizing by partially unrolling the loop. */ | |
| 4084 if (SYMBOLP (fun)) | |
| 4085 { | |
| 4086 fun = XSYMBOL (fun)->function; | |
| 4087 if (SYMBOLP (fun)) | |
| 4088 { | |
| 4089 fun = XSYMBOL (fun)->function; | |
| 4090 if (SYMBOLP (fun)) | |
| 4091 fun = indirect_function (fun, 1); | |
| 4092 } | |
| 4093 } | |
| 4094 | |
| 4095 if (SUBRP (fun)) | |
| 4096 { | |
| 4097 Lisp_Subr *subr = XSUBR (fun); | |
| 4098 int max_args = subr->max_args; | |
| 4099 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4100 | |
| 4101 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4102 { | |
| 4103 funcall_subr: | |
| 1292 | 4104 PROFILE_ENTER_FUNCTION (); |
| 428 | 4105 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4106 PROFILE_EXIT_FUNCTION (); |
| 428 | 4107 } |
| 436 | 4108 else if (fun_nargs < subr->min_args) |
| 4109 { | |
| 4110 goto wrong_number_of_arguments; | |
| 4111 } | |
| 428 | 4112 else if (fun_nargs < max_args) |
| 4113 { | |
| 4114 Lisp_Object *p = spacious_args; | |
| 4115 | |
| 4116 /* Default optionals to nil */ | |
| 4117 while (fun_nargs--) | |
| 4118 *p++ = *fun_args++; | |
| 4119 while (p - spacious_args < max_args) | |
| 4120 *p++ = Qnil; | |
| 4121 | |
| 4122 fun_args = spacious_args; | |
| 4123 goto funcall_subr; | |
| 4124 } | |
| 4125 else if (max_args == MANY) | |
| 4126 { | |
| 1292 | 4127 PROFILE_ENTER_FUNCTION (); |
| 436 | 4128 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4129 PROFILE_EXIT_FUNCTION (); |
| 428 | 4130 } |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4131 else if (max_args == UNEVALLED) /* Can't funcall a special operator */ |
| 428 | 4132 { |
|
5222
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4133 |
|
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4134 #ifdef NEED_TO_HANDLE_21_4_CODE |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4135 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4136 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4137 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4138 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4139 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4140 } |
|
5222
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4141 #endif /* NEED_TO_HANDLE_21_4_CODE */ |
|
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4142 |
| 428 | 4143 goto invalid_function; |
| 4144 } | |
| 4145 else | |
| 4146 { | |
| 4147 wrong_number_of_arguments: | |
| 436 | 4148 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4149 } |
| 4150 } | |
| 4151 else if (COMPILED_FUNCTIONP (fun)) | |
| 4152 { | |
| 1292 | 4153 PROFILE_ENTER_FUNCTION (); |
| 428 | 4154 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4155 PROFILE_EXIT_FUNCTION (); |
| 428 | 4156 } |
| 4157 else if (CONSP (fun)) | |
| 4158 { | |
| 4159 Lisp_Object funcar = XCAR (fun); | |
| 4160 | |
| 4161 if (EQ (funcar, Qlambda)) | |
| 4162 { | |
| 1292 | 4163 PROFILE_ENTER_FUNCTION (); |
| 428 | 4164 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4165 PROFILE_EXIT_FUNCTION (); |
| 428 | 4166 } |
| 4167 else if (EQ (funcar, Qautoload)) | |
| 4168 { | |
| 970 | 4169 /* do_autoload GCPROs both arguments */ |
| 428 | 4170 do_autoload (fun, args[0]); |
| 4171 goto retry; | |
| 4172 } | |
| 4173 else /* Can't funcall a macro */ | |
| 4174 { | |
| 4175 goto invalid_function; | |
| 4176 } | |
| 4177 } | |
| 4178 else if (UNBOUNDP (fun)) | |
| 4179 { | |
| 436 | 4180 val = signal_void_function_error (args[0]); |
| 428 | 4181 } |
| 4182 else | |
| 4183 { | |
| 4184 invalid_function: | |
| 436 | 4185 val = signal_invalid_function_error (fun); |
| 428 | 4186 } |
| 4187 | |
| 4188 lisp_eval_depth--; | |
| 4189 if (backtrace.debug_on_exit) | |
| 4190 val = do_debug_on_exit (val); | |
| 4191 POP_BACKTRACE (backtrace); | |
| 4192 return val; | |
| 4193 } | |
| 4194 | |
| 4195 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4196 Return t if OBJECT can be called as a function, else nil. | |
| 4197 A function is an object that can be applied to arguments, | |
| 4198 using for example `funcall' or `apply'. | |
| 4199 */ | |
| 4200 (object)) | |
| 4201 { | |
| 4202 if (SYMBOLP (object)) | |
| 4203 object = indirect_function (object, 0); | |
| 4204 | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4205 if (COMPILED_FUNCTIONP (object) |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4206 || (SUBRP (object) |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4207 && (XSUBR (object)->max_args != UNEVALLED))) |
| 919 | 4208 return Qt; |
| 4209 if (CONSP (object)) | |
| 4210 { | |
| 4211 Lisp_Object car = XCAR (object); | |
| 4212 if (EQ (car, Qlambda)) | |
| 4213 return Qt; | |
| 4214 if (EQ (car, Qautoload) | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4215 && NILP (Fcar_safe (Fcdr_safe(Fcdr_safe |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4216 (Fcdr_safe (XCDR (object))))))) |
| 919 | 4217 return Qt; |
| 4218 } | |
| 4219 return Qnil; | |
| 428 | 4220 } |
| 4221 | |
| 4222 static Lisp_Object | |
| 4223 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4224 { | |
| 4225 Lisp_Object orig_function = function; | |
| 4226 Lisp_Object arglist; | |
| 4227 | |
| 4228 retry: | |
| 4229 | |
| 4230 if (SYMBOLP (function)) | |
| 4231 function = indirect_function (function, 1); | |
| 4232 | |
| 4233 if (SUBRP (function)) | |
| 4234 { | |
| 442 | 4235 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4236 if (function_min_args_p) | |
| 4237 return Fsubr_min_args (function); | |
| 4238 else | |
| 4239 return Fsubr_max_args (function); | |
| 428 | 4240 } |
| 4241 else if (COMPILED_FUNCTIONP (function)) | |
| 4242 { | |
| 814 | 4243 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4244 | |
| 1737 | 4245 if (!OPAQUEP (f->instructions)) |
| 4246 /* Lazily munge the instructions into a more efficient form */ | |
| 4247 /* Needed to set max_args */ | |
| 4248 optimize_compiled_function (function); | |
| 4249 | |
| 814 | 4250 if (function_min_args_p) |
| 4251 return make_int (f->min_args); | |
| 4252 else if (f->max_args == MANY) | |
| 4253 return Qnil; | |
| 4254 else | |
| 4255 return make_int (f->max_args); | |
| 428 | 4256 } |
| 4257 else if (CONSP (function)) | |
| 4258 { | |
| 4259 Lisp_Object funcar = XCAR (function); | |
| 4260 | |
| 4261 if (EQ (funcar, Qmacro)) | |
| 4262 { | |
| 4263 function = XCDR (function); | |
| 4264 goto retry; | |
| 4265 } | |
| 4266 else if (EQ (funcar, Qautoload)) | |
| 4267 { | |
| 970 | 4268 /* do_autoload GCPROs both arguments */ |
| 428 | 4269 do_autoload (function, orig_function); |
| 442 | 4270 function = orig_function; |
| 428 | 4271 goto retry; |
| 4272 } | |
| 4273 else if (EQ (funcar, Qlambda)) | |
| 4274 { | |
| 4275 arglist = Fcar (XCDR (function)); | |
| 4276 } | |
| 4277 else | |
| 4278 { | |
| 4279 goto invalid_function; | |
| 4280 } | |
| 4281 } | |
| 4282 else | |
| 4283 { | |
| 4284 invalid_function: | |
| 442 | 4285 return signal_invalid_function_error (orig_function); |
| 428 | 4286 } |
| 4287 | |
| 4288 { | |
| 4289 int argcount = 0; | |
| 4290 | |
| 4291 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4292 { | |
| 4293 if (EQ (arg, Qand_optional)) | |
| 4294 { | |
| 4295 if (function_min_args_p) | |
| 4296 break; | |
| 4297 } | |
| 4298 else if (EQ (arg, Qand_rest)) | |
| 4299 { | |
| 4300 if (function_min_args_p) | |
| 4301 break; | |
| 4302 else | |
| 4303 return Qnil; | |
| 4304 } | |
| 4305 else | |
| 4306 { | |
| 4307 argcount++; | |
| 4308 } | |
| 4309 } | |
| 4310 | |
| 4311 return make_int (argcount); | |
| 4312 } | |
| 4313 } | |
| 4314 | |
| 4315 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4316 Return the minimum number of arguments a function may be called with. |
| 428 | 4317 The function may be any form that can be passed to `funcall', |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4318 any special operator, or any macro. |
| 853 | 4319 |
| 4320 To check if a function can be called with a specified number of | |
| 4321 arguments, use `function-allows-args'. | |
| 428 | 4322 */ |
| 4323 (function)) | |
| 4324 { | |
| 4325 return function_argcount (function, 1); | |
| 4326 } | |
| 4327 | |
| 4328 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4329 Return the maximum number of arguments a function may be called with. |
| 428 | 4330 The function may be any form that can be passed to `funcall', |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4331 any special operator, or any macro. |
| 428 | 4332 If the function takes an arbitrary number of arguments or is |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4333 a built-in special operator, nil is returned. |
| 853 | 4334 |
| 4335 To check if a function can be called with a specified number of | |
| 4336 arguments, use `function-allows-args'. | |
| 428 | 4337 */ |
| 4338 (function)) | |
| 4339 { | |
| 4340 return function_argcount (function, 0); | |
| 4341 } | |
| 4342 | |
| 4343 | |
| 4344 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4345 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4346 Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4347 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4348 arguments: (FUNCTION &rest ARGS) |
| 428 | 4349 */ |
| 4350 (int nargs, Lisp_Object *args)) | |
| 4351 { | |
| 4352 /* This function can GC */ | |
| 4353 Lisp_Object fun = args[0]; | |
| 4354 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4355 int numargs; | |
| 4356 int funcall_nargs; | |
| 4357 | |
| 4358 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4359 | |
| 4360 if (numargs == 0) | |
| 4361 /* (apply foo 0 1 '()) */ | |
| 4362 return Ffuncall (nargs - 1, args); | |
| 4363 else if (numargs == 1) | |
| 4364 { | |
| 4365 /* (apply foo 0 1 '(2)) */ | |
| 4366 args [nargs - 1] = XCAR (spread_arg); | |
| 4367 return Ffuncall (nargs, args); | |
| 4368 } | |
| 4369 | |
| 4370 /* -1 for function, -1 for spread arg */ | |
| 4371 numargs = nargs - 2 + numargs; | |
| 4372 /* +1 for function */ | |
| 4373 funcall_nargs = 1 + numargs; | |
| 4374 | |
| 4375 if (SYMBOLP (fun)) | |
| 4376 fun = indirect_function (fun, 0); | |
| 4377 | |
| 4378 if (SUBRP (fun)) | |
| 4379 { | |
| 4380 Lisp_Subr *subr = XSUBR (fun); | |
| 4381 int max_args = subr->max_args; | |
| 4382 | |
| 4383 if (numargs < subr->min_args | |
| 4384 || (max_args >= 0 && max_args < numargs)) | |
| 4385 { | |
| 4386 /* Let funcall get the error */ | |
| 4387 } | |
| 4388 else if (max_args > numargs) | |
| 4389 { | |
| 4390 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4391 by explicitly supplying nil's for optional values */ | |
| 4392 funcall_nargs += (max_args - numargs); | |
| 4393 } | |
| 4394 } | |
| 4395 else if (UNBOUNDP (fun)) | |
| 4396 { | |
| 4397 /* Let funcall get the error */ | |
| 4398 fun = args[0]; | |
| 4399 } | |
| 4400 | |
| 4401 { | |
| 4402 REGISTER int i; | |
| 4403 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4404 struct gcpro gcpro1; | |
| 4405 | |
| 4406 GCPRO1 (*funcall_args); | |
| 4407 gcpro1.nvars = funcall_nargs; | |
| 4408 | |
| 4409 /* Copy in the unspread args */ | |
| 4410 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4411 /* Spread the last arg we got. Its first element goes in | |
| 4412 the slot that it used to occupy, hence this value of I. */ | |
| 4413 for (i = nargs - 1; | |
| 4414 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4415 i++, spread_arg = XCDR (spread_arg)) | |
| 4416 { | |
| 4417 funcall_args [i] = XCAR (spread_arg); | |
| 4418 } | |
| 4419 /* Supply nil for optional args (to subrs) */ | |
| 4420 for (; i < funcall_nargs; i++) | |
| 4421 funcall_args[i] = Qnil; | |
| 4422 | |
| 4423 | |
| 4424 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4425 } | |
| 4426 } | |
| 4427 | |
| 4428 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4429 return the result of evaluation. */ | |
| 4430 | |
| 4431 static Lisp_Object | |
| 4432 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4433 { | |
| 4434 /* This function can GC */ | |
| 442 | 4435 Lisp_Object arglist, body, tail; |
| 428 | 4436 int speccount = specpdl_depth(); |
| 4437 REGISTER int i = 0; | |
| 4438 | |
| 4439 tail = XCDR (fun); | |
| 4440 | |
| 4441 if (!CONSP (tail)) | |
| 4442 goto invalid_function; | |
| 4443 | |
| 4444 arglist = XCAR (tail); | |
| 4445 body = XCDR (tail); | |
| 4446 | |
| 4447 { | |
| 4448 int optional = 0, rest = 0; | |
| 4449 | |
| 442 | 4450 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4451 { |
| 4452 if (!SYMBOLP (symbol)) | |
| 4453 goto invalid_function; | |
| 4454 if (EQ (symbol, Qand_rest)) | |
| 4455 rest = 1; | |
| 4456 else if (EQ (symbol, Qand_optional)) | |
| 4457 optional = 1; | |
| 4458 else if (rest) | |
| 4459 { | |
| 4460 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4461 i = nargs; | |
| 4462 } | |
| 4463 else if (i < nargs) | |
| 4464 specbind (symbol, args[i++]); | |
| 4465 else if (!optional) | |
| 4466 goto wrong_number_of_arguments; | |
| 4467 else | |
| 4468 specbind (symbol, Qnil); | |
| 4469 } | |
| 4470 } | |
| 4471 | |
| 4472 if (i < nargs) | |
| 4473 goto wrong_number_of_arguments; | |
| 4474 | |
| 771 | 4475 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4476 |
| 4477 wrong_number_of_arguments: | |
| 436 | 4478 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4479 |
| 4480 invalid_function: | |
| 436 | 4481 return signal_invalid_function_error (fun); |
| 428 | 4482 } |
| 4483 | |
| 4484 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4485 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4486 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4487 A multiple value object is returned by #'values if: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4488 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4489 -- The number of arguments to #'values is not one, and: |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4490 -- Some special operator in the call stack is prepared to handle more than |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4491 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4492 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4493 The return value of #'values-list is analogous to that of #'values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4494 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4495 Henry Baker, in https://eprints.kfupm.edu.sa/31898/1/31898.pdf ("CONS |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4496 Should not CONS its Arguments, or, a Lazy Alloc is a Smart Alloc", ACM |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4497 Sigplan Notices 27,3 (March 1992),24-34.) says it should be possible to |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4498 allocate Common Lisp multiple-value objects on the stack, but this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4499 assumes that variable-length records can be allocated on the stack, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4500 something not true for us. As far as I can tell, it also ignores the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4501 contexts where multiple-values need to be thrown, or maybe it thinks such |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4502 objects should be converted to heap allocation at that point. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4503 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4504 The specific multiple values saved and returned depend on how many |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4505 multiple-values special operators in the stack are interested in; for |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4506 example, if #'multiple-value-call is somewhere in the call stack, all |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4507 values passed to #'values will be saved and returned. If an expansion of |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4508 #'multiple-value-setq with 10 SYMS is the only part of the call stack |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4509 interested in multiple values, then a maximum of ten multiple values will |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4510 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4511 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4512 (#'throw passes back multiple values in its VALUE argument; this is why |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4513 we can't just take the details of the most immediate |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4514 #'multiple-value-{whatever} call to work out which values to save, we |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4515 need to look at the whole stack, or, equivalently, the dynamic variables |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4516 we set to reflect the whole stack.) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4517 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4518 The first value passed to #'values will always be saved, since that is |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4519 needed to convert a multiple value object into a single value object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4520 something that is normally necessary independent of how many functions in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4521 the call stack are interested in multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4522 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4523 However many values (for values of "however many" that are not one) are |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4524 saved and restored, the multiple value object knows how many arguments it |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4525 would contain were none to have been discarded, and will indicate this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4526 on being printed from within GDB. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4527 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4528 In lisp-interaction-mode, no multiple values should be discarded (unless |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4529 they need to be for the sake of the correctness of the program); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4530 #'eval-interactive-with-multiple-value-list in lisp-mode.el wraps its |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4531 #'eval calls with #'multiple-value-list calls to avoid this. This means |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4532 that there is a small performance and memory penalty for code evaluated |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4533 in *scratch*; use M-: EXPRESSION RET if you really need to avoid |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4534 this. Lisp code execution that is not ultimately from hitting C-j in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4535 *scratch*--that is, the vast vast majority of Lisp code execution--does |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4536 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4537 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4538 Probably the most important aspect of multiple values is stated with |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4539 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4540 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4541 "No matter how many values a form produces, if the form is an argument |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4542 form in a function call, then exactly one value (the first one) is |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4543 used." |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4544 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 This means that most contexts, most of the time, will never see multiple |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4546 values. There are important exceptions; search the web for that text in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4547 quotation marks and read the related chapter. This code handles all of |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4548 them, to my knowledge. Aidan Kehoe, Mon Mar 16 00:17:39 GMT 2009. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4549 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4550 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4551 make_multiple_value (Lisp_Object first_value, Elemcount count, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4552 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4553 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4554 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4555 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4556 Elemcount i, allocated_count; |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4557 Lisp_Object mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4558 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4559 assert (count != 1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4560 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4561 if (1 != upper_limit && (0 == first_desired)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4562 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4563 /* We always allocate element zero, and that's taken into account when |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4564 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4565 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4566 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4567 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4568 if (first_desired >= count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4569 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4570 /* We can't pass anything back that our caller is interested in. Only |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4571 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 allocated_count = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4573 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4574 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4575 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4576 allocated_count = 1 + ((upper_limit > count ? count : upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4577 - first_desired); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4578 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4579 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 sizem = FLEXIBLE_ARRAY_STRUCT_SIZEOF (multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4581 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 contents, allocated_count); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4583 mvobj = ALLOC_SIZED_LISP_OBJECT (sizem, multiple_value); |
|
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4584 mv = XMULTIPLE_VALUE (mvobj); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4585 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4586 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 mv->contents[0] = first_value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4590 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4591 for (i = first_desired; i < upper_limit && i < count; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4592 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4593 mv->contents[1 + (i - first_desired)] = Qunbound; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4594 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4595 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4596 return mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4597 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4598 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4599 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 multiple_value_aset (Lisp_Object obj, Elemcount index, Lisp_Object value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4601 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4602 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4603 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4604 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4605 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4606 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4607 (index < first_desired || index >= (first_desired + allocated_count))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4608 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4609 args_out_of_range (make_int (first_desired), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4610 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4611 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4612 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4613 mv->contents[index == 0 ? 0 : 1 + (index - first_desired)] = value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4614 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4615 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4616 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4617 multiple_value_aref (Lisp_Object obj, Elemcount index) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4618 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4619 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4620 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4621 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4622 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4623 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4624 (index < first_desired || index >= (first_desired + allocated_count))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4625 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4626 args_out_of_range (make_int (first_desired), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4628 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4629 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4630 return mv->contents[index == 0 ? 0 : 1 + (index - first_desired)]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4631 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4632 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4633 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4634 print_multiple_value (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4635 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4636 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4637 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4638 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 Elemcount count = mv->count, index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4641 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4642 { |
|
5146
88bd4f3ef8e4
make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
Ben Wing <ben@xemacs.org>
parents:
5142
diff
changeset
|
4643 printing_unreadable_object_fmt ("#<multiple values 0x%x>", |
|
88bd4f3ef8e4
make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
Ben Wing <ben@xemacs.org>
parents:
5142
diff
changeset
|
4644 LISP_OBJECT_UID (obj)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4645 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4647 write_fmt_string (printcharfun, |
|
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4648 "#<INTERNAL OBJECT (XEmacs bug?) %d multiple values," |
|
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4649 " data (", count); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4650 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4651 for (index = 0; index < count;) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4652 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4653 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4654 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4655 index >= (first_desired + (allocated_count - 1)))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4656 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4657 write_fmt_string (printcharfun, "#<discarded-multiple-value %d>", |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4658 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4660 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4661 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4662 print_internal (multiple_value_aref (obj, index), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4663 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4664 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4665 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4666 ++index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4668 if (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 { |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4670 write_ascstring (printcharfun, " "); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4671 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4672 } |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4673 |
|
5146
88bd4f3ef8e4
make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
Ben Wing <ben@xemacs.org>
parents:
5142
diff
changeset
|
4674 write_fmt_string (printcharfun, ") 0x%x>", LISP_OBJECT_UID (obj)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4675 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4676 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4677 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4678 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4679 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4680 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4681 Elemcount index, allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4682 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4683 for (index = 0; index < allocated_count; ++index) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4684 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4685 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4686 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4687 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4688 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4689 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4690 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4691 static Bytecount |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4692 size_multiple_value (Lisp_Object obj) |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4693 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4694 return FLEXIBLE_ARRAY_STRUCT_SIZEOF (struct multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4695 Lisp_Object, contents, |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4696 XMULTIPLE_VALUE (obj)->allocated_count); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4697 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4698 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4699 static const struct memory_description multiple_value_description[] = { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4700 { XD_LONG, offsetof (struct multiple_value, count) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4701 { XD_ELEMCOUNT, offsetof (struct multiple_value, allocated_count) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4702 { XD_LONG, offsetof (struct multiple_value, first_desired) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4703 { XD_LISP_OBJECT_ARRAY, offsetof (struct multiple_value, contents), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4704 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4705 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4706 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4707 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4708 DEFINE_DUMPABLE_SIZABLE_LISP_OBJECT ("multiple-value", multiple_value, |
|
5124
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4709 mark_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4710 print_multiple_value, 0, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4711 0, /* No equal method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4712 0, /* No hash method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4713 multiple_value_description, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4714 size_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4715 struct multiple_value); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4716 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4717 /* Given that FIRST and UPPER are the inclusive lower and exclusive upper |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4718 bounds for the multiple values we're interested in, modify (or don't) the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4719 special variables used to indicate this to #'values and #'values-list. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4720 Returns the specpdl_depth() value before any modification. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4721 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4722 bind_multiple_value_limits (int first, int upper) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4723 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4724 int result = specpdl_depth(); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4725 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4726 if (!(upper > first)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4727 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4728 invalid_argument ("MULTIPLE-VALUE-UPPER-LIMIT must be greater than " |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4729 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4730 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4731 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 if (upper > Vmultiple_values_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4733 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4734 args_out_of_range (make_int (upper), make_int (Vmultiple_values_limit)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4735 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4736 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4737 /* In the event that something back up the stack wants more multiple |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4738 values than we do, we need to keep its figures for |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4739 first_desired_multiple_value or multiple_value_current_limit both. It |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4740 may be that the form will throw past us. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4741 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4742 If first_desired_multiple_value is zero, this means it hasn't ever been |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4743 bound, and any value we have for first is appropriate to use. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4744 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4745 Zeroth element is always saved, no need to note that: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4746 if (0 == first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4747 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4748 first = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4749 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4750 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 || first < first_desired_multiple_value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4753 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4754 internal_bind_int (&first_desired_multiple_value, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4755 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4756 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4757 if (upper > multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4758 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4759 internal_bind_int (&multiple_value_current_limit, upper); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4760 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4761 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4762 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4763 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4764 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4765 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4766 multiple_value_call (int nargs, Lisp_Object *args) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4767 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4768 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4769 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4770 Lisp_Object result = Qnil, head = Fcons (args[0], Qnil), list_offset; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4771 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4772 Lisp_Object apply_args[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4773 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4774 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4775 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4776 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4777 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4778 CHECK_FUNCTION (args[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4779 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4780 /* Start at 4, to ignore the function, the speccount, and the arguments to |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 multiple-values-limit (which we don't discard because |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4782 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 for (i = 4; i < nargs; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4785 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4786 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4787 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4788 Lisp_Object val; |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4789 Elemcount j, count = XMULTIPLE_VALUE_COUNT (result); |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4790 |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4791 for (j = 0; j < count; j++) |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4792 { |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4793 val = multiple_value_aref (result, j); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4794 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4796 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4797 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4798 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4800 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4801 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4802 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4803 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4804 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4805 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4806 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4807 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4808 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4809 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4810 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4811 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4812 RETURN_UNGCPRO (Fapply (countof(apply_args), apply_args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4814 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 DEFUN ("multiple-value-call", Fmultiple_value_call, 1, UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4816 Call FUNCTION with arguments FORMS, using multiple values when returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4817 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4818 All of the (possibly multiple) values returned by each form in FORMS are |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4819 gathered together, and given as arguments to FUNCTION; conceptually, this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4820 function is a version of `apply' that by-passes the multiple values |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4821 infrastructure, treating multiple values as intercalated lists. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4822 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4823 arguments: (FUNCTION &rest FORMS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4824 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4825 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4826 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4827 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4832 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4833 constructed_args = alloca_array (Lisp_Object, listcount + 3); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4834 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4835 /* Fcar so we error on non-cons: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 constructed_args[i] = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4837 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4838 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4840 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4841 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4843 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4844 constructed_args[i] = make_int (Vmultiple_values_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4845 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4846 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4847 speccount = bind_multiple_value_limits (0, Vmultiple_values_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4848 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4849 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4850 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4851 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4852 LIST_LOOP_2 (elt, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4853 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4855 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4856 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4857 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4858 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4859 RETURN_UNGCPRO (multiple_value_call (listcount + 3, constructed_args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4860 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4861 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4862 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4863 multiple_value_list_internal (int nargs, Lisp_Object *args) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4864 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4865 int first = XINT (args[0]), upper = XINT (args[1]), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4866 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4867 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4868 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4869 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4870 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4871 result = args[3]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4872 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4874 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4875 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4878 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4879 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4880 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4881 for (; first < upper && first < count; ++first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4884 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4885 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4886 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4887 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4888 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4889 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4890 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4891 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4892 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4893 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4894 if (first == 0) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4895 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4896 return Fcons (result, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4897 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4898 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4901 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4902 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4903 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4904 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4905 DEFUN ("multiple-value-list-internal", Fmultiple_value_list_internal, 3, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4906 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4907 Evaluate FORM. Return a list of multiple vals reflecting the other two args. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4908 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4909 Don't use this. Use `multiple-value-list', the macro specified by Common |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4910 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4911 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4912 FIRST-DESIRED-MULTIPLE-VALUE is the first element in list of multiple values |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4913 to pass back. MULTIPLE-VALUE-UPPER-LIMIT is the exclusive upper limit on |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4914 the indexes within the values that may be passed back; this function will |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4915 never return a list longer than MULTIPLE-VALUE-UPPER-LIMIT - |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4916 FIRST-DESIRED-MULTIPLE-VALUE. It may return a list shorter than that, if |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4917 `values' or `values-list' do not supply enough elements. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4918 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4919 arguments: (FIRST-DESIRED-MULTIPLE-VALUE MULTIPLE-VALUE-UPPER-LIMIT FORM) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4920 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4921 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4922 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4924 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4925 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4926 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4927 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4928 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4929 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4930 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4931 list2 (Qmultiple_value_list_internal, make_int (nargs))); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4932 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4933 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 argv[0] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4935 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4936 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4937 gcpro1.nvars = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4938 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4939 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4940 argv[1] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4941 |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4942 check_integer_range (argv[1], Qzero, make_int (EMACS_INT_MAX)); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4943 check_integer_range (argv[0], Qzero, argv[1]); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4944 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4945 upper = XINT (argv[1]); |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4946 first = XINT (argv[0]); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4947 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4948 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4949 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4950 /* The unintuitive order of things here is for the sake of the bytecode; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4951 the alternative would be to encode the number of arguments in the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 bytecode stream, which complicates things if we have more than 255 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4953 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4954 argv[2] = make_int (bind_multiple_value_limits (first, upper)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4955 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4956 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4957 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4958 /* GCPROing in this function is not strictly necessary, this Feval is the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4959 only point that may cons up data that is not immediately discarded, and |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4960 within it is the only point (in Fmultiple_value_list_internal and |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4961 multiple_value_list) that we can garbage collect. But I'm conservative, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4962 and this function is called so rarely (only from interpreted code) that |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4964 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4965 gcpro1.nvars = 4; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4966 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4967 RETURN_UNGCPRO (multiple_value_list_internal (countof (argv), argv)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4968 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4969 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4970 DEFUN ("multiple-value-prog1", Fmultiple_value_prog1, 1, UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4971 Similar to `prog1', but return any multiple values from the first form. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 `prog1' itself will never return multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4973 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4974 arguments: (FIRST &rest BODY) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4976 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4977 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4978 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4979 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4980 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4981 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4982 val = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4983 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4984 GCPRO1 (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4986 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4987 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4988 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4989 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4990 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4991 RETURN_UNGCPRO (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4992 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4993 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4995 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4996 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4997 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4998 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4999 (int nargs, Lisp_Object *args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5000 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5001 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5002 int counting = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5003 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5004 /* Pathological cases, no need to cons up an object: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5005 if (1 == nargs || 1 == multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5006 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5007 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5008 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5009 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5010 /* If nargs is zero, this code is correct and desirable. With |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5011 #'multiple-value-call, we want zero-length multiple values in the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5012 argument list to be discarded entirely, and we can't do this if we |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5013 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5014 result = make_multiple_value (nargs ? args[0] : Qnil, nargs, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5015 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5016 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5017 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5018 for (; counting < nargs; ++counting) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5019 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5020 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5021 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5022 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5023 multiple_value_aset (result, counting, args[counting]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5024 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5025 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5026 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5027 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5028 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5029 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5030 DEFUN ("values-list", Fvalues_list, 1, 1, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5031 Return all the elements of LIST as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5032 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5033 (list)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5034 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5035 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5036 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5037 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5038 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5039 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5040 /* Pathological cases, no need to cons up an object: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5041 if (1 == listcount || 1 == multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5042 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5043 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5044 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5045 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5046 result = make_multiple_value (Fcar_safe (list), listcount, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5047 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5048 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5049 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5050 list = Fcdr_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5051 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5052 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5053 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5054 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5055 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5056 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5057 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5058 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5059 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5060 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5061 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5062 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5063 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5064 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5065 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5066 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5067 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5068 values2 (Lisp_Object first, Lisp_Object second) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5069 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5070 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5071 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5072 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5073 argv[1] = second; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5074 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5075 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5076 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5077 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5078 |
| 428 | 5079 /************************************************************************/ |
| 5080 /* Run hook variables in various ways. */ | |
| 5081 /************************************************************************/ | |
| 5082 | |
| 5083 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5084 Run each hook in HOOKS. Major mode functions use this. | |
| 5085 Each argument should be a symbol, a hook variable. | |
| 5086 These symbols are processed in the order specified. | |
| 5087 If a hook symbol has a non-nil value, that value may be a function | |
| 5088 or a list of functions to be called to run the hook. | |
| 5089 If the value is a function, it is called with no arguments. | |
| 5090 If it is a list, the elements are called, in order, with no arguments. | |
| 5091 | |
| 5092 To make a hook variable buffer-local, use `make-local-hook', | |
| 5093 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5094 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5095 arguments: (FIRST &rest REST) |
| 428 | 5096 */ |
| 5097 (int nargs, Lisp_Object *args)) | |
| 5098 { | |
| 5099 REGISTER int i; | |
| 5100 | |
| 5101 for (i = 0; i < nargs; i++) | |
| 5102 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5103 | |
| 5104 return Qnil; | |
| 5105 } | |
| 5106 | |
| 5107 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5108 Run HOOK with the specified arguments ARGS. | |
| 5109 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5110 value, that value may be a function or a list of functions to be | |
| 5111 called to run the hook. If the value is a function, it is called with | |
| 5112 the given arguments and its return value is returned. If it is a list | |
| 5113 of functions, those functions are called, in order, | |
| 5114 with the given arguments ARGS. | |
| 444 | 5115 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5116 as that may change. |
| 5117 | |
| 5118 To make a hook variable buffer-local, use `make-local-hook', | |
| 5119 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5120 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5121 arguments: (HOOK &rest ARGS) |
| 428 | 5122 */ |
| 5123 (int nargs, Lisp_Object *args)) | |
| 5124 { | |
| 5125 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5126 } | |
| 5127 | |
| 5128 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5129 Run HOOK with the specified arguments ARGS. | |
| 5130 HOOK should be a symbol, a hook variable. Its value should | |
| 5131 be a list of functions. We call those functions, one by one, | |
| 5132 passing arguments ARGS to each of them, until one of them | |
| 5133 returns a non-nil value. Then we return that value. | |
| 5134 If all the functions return nil, we return nil. | |
| 5135 | |
| 5136 To make a hook variable buffer-local, use `make-local-hook', | |
| 5137 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5138 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5139 arguments: (HOOK &rest ARGS) |
| 428 | 5140 */ |
| 5141 (int nargs, Lisp_Object *args)) | |
| 5142 { | |
| 5143 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5144 } | |
| 5145 | |
| 5146 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5147 Run HOOK with the specified arguments ARGS. | |
| 5148 HOOK should be a symbol, a hook variable. Its value should | |
| 5149 be a list of functions. We call those functions, one by one, | |
| 5150 passing arguments ARGS to each of them, until one of them | |
| 5151 returns nil. Then we return nil. | |
| 5152 If all the functions return non-nil, we return non-nil. | |
| 5153 | |
| 5154 To make a hook variable buffer-local, use `make-local-hook', | |
| 5155 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5156 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5157 arguments: (HOOK &rest ARGS) |
| 428 | 5158 */ |
| 5159 (int nargs, Lisp_Object *args)) | |
| 5160 { | |
| 5161 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5162 } | |
| 5163 | |
| 5164 /* ARGS[0] should be a hook symbol. | |
| 5165 Call each of the functions in the hook value, passing each of them | |
| 5166 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5167 COND specifies a condition to test after each call | |
| 5168 to decide whether to stop. | |
| 5169 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5170 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5171 | |
| 5172 Lisp_Object | |
| 5173 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5174 enum run_hooks_condition cond) | |
| 5175 { | |
| 5176 Lisp_Object sym, val, ret; | |
| 5177 | |
| 5178 if (!initialized || preparing_for_armageddon) | |
| 5179 /* We need to bail out of here pronto. */ | |
| 5180 return Qnil; | |
| 5181 | |
| 3092 | 5182 #ifndef NEW_GC |
| 428 | 5183 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5184 will also be true unless something is really hosed. */ | |
| 5185 assert (!gc_in_progress); | |
| 3092 | 5186 #endif /* not NEW_GC */ |
| 428 | 5187 |
| 5188 sym = args[0]; | |
| 771 | 5189 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5190 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5191 | |
| 5192 if (UNBOUNDP (val) || NILP (val)) | |
| 5193 return ret; | |
| 5194 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5195 { | |
| 5196 args[0] = val; | |
| 5197 return Ffuncall (nargs, args); | |
| 5198 } | |
| 5199 else | |
| 5200 { | |
| 5201 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5202 Lisp_Object globals = Qnil; | |
| 5203 GCPRO3 (sym, val, globals); | |
| 5204 | |
| 5205 for (; | |
| 5206 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5207 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5208 : !NILP (ret))); | |
| 5209 val = XCDR (val)) | |
| 5210 { | |
| 5211 if (EQ (XCAR (val), Qt)) | |
| 5212 { | |
| 5213 /* t indicates this hook has a local binding; | |
| 5214 it means to run the global binding too. */ | |
| 5215 globals = Fdefault_value (sym); | |
| 5216 | |
| 5217 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5218 ! NILP (globals)) | |
| 5219 { | |
| 5220 args[0] = globals; | |
| 5221 ret = Ffuncall (nargs, args); | |
| 5222 } | |
| 5223 else | |
| 5224 { | |
| 5225 for (; | |
| 5226 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5227 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5228 ? NILP (ret) | |
| 5229 : !NILP (ret))); | |
| 5230 globals = XCDR (globals)) | |
| 5231 { | |
| 5232 args[0] = XCAR (globals); | |
| 5233 /* In a global value, t should not occur. If it does, we | |
| 5234 must ignore it to avoid an endless loop. */ | |
| 5235 if (!EQ (args[0], Qt)) | |
| 5236 ret = Ffuncall (nargs, args); | |
| 5237 } | |
| 5238 } | |
| 5239 } | |
| 5240 else | |
| 5241 { | |
| 5242 args[0] = XCAR (val); | |
| 5243 ret = Ffuncall (nargs, args); | |
| 5244 } | |
| 5245 } | |
| 5246 | |
| 5247 UNGCPRO; | |
| 5248 return ret; | |
| 5249 } | |
| 5250 } | |
| 5251 | |
| 5252 Lisp_Object | |
| 5253 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5254 enum run_hooks_condition cond) | |
| 5255 { | |
| 5256 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5257 } | |
| 5258 | |
| 5259 #if 0 | |
| 5260 | |
| 853 | 5261 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5262 |
| 5263 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5264 present value of that symbol. | |
| 5265 Call each element of FUNLIST, | |
| 5266 passing each of them the rest of ARGS. | |
| 5267 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5268 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5269 | |
| 5270 Lisp_Object | |
| 5271 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5272 { | |
| 853 | 5273 omitted; |
| 428 | 5274 } |
| 5275 | |
| 5276 #endif /* 0 */ | |
| 5277 | |
| 5278 void | |
| 5279 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5280 { | |
| 5281 /* This function can GC */ | |
| 5282 struct gcpro gcpro1; | |
| 5283 int i; | |
| 5284 va_list vargs; | |
| 5285 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5286 | |
| 5287 va_start (vargs, nargs); | |
| 5288 funcall_args[0] = hook_var; | |
| 5289 for (i = 0; i < nargs; i++) | |
| 5290 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5291 va_end (vargs); | |
| 5292 | |
| 5293 GCPRO1 (*funcall_args); | |
| 5294 gcpro1.nvars = nargs + 1; | |
| 5295 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5296 UNGCPRO; | |
| 5297 } | |
| 5298 | |
| 5299 void | |
| 5300 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5301 int nargs, ...) | |
| 5302 { | |
| 5303 /* This function can GC */ | |
| 5304 struct gcpro gcpro1; | |
| 5305 int i; | |
| 5306 va_list vargs; | |
| 5307 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5308 | |
| 5309 va_start (vargs, nargs); | |
| 5310 funcall_args[0] = hook_var; | |
| 5311 for (i = 0; i < nargs; i++) | |
| 5312 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5313 va_end (vargs); | |
| 5314 | |
| 5315 GCPRO1 (*funcall_args); | |
| 5316 gcpro1.nvars = nargs + 1; | |
| 5317 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5318 RUN_HOOKS_TO_COMPLETION); | |
| 5319 UNGCPRO; | |
| 5320 } | |
| 5321 | |
| 5322 Lisp_Object | |
| 5323 run_hook (Lisp_Object hook) | |
| 5324 { | |
| 853 | 5325 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5326 } |
| 5327 | |
| 5328 | |
| 5329 /************************************************************************/ | |
| 5330 /* Front-ends to eval, funcall, apply */ | |
| 5331 /************************************************************************/ | |
| 5332 | |
| 5333 /* Apply fn to arg */ | |
| 5334 Lisp_Object | |
| 5335 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5336 { | |
| 5337 /* This function can GC */ | |
| 5338 struct gcpro gcpro1; | |
| 5339 Lisp_Object args[2]; | |
| 5340 | |
| 5341 if (NILP (arg)) | |
| 5342 return Ffuncall (1, &fn); | |
| 5343 GCPRO1 (args[0]); | |
| 5344 gcpro1.nvars = 2; | |
| 5345 args[0] = fn; | |
| 5346 args[1] = arg; | |
| 5347 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5348 } | |
| 5349 | |
| 5350 /* Call function fn on no arguments */ | |
| 5351 Lisp_Object | |
| 5352 call0 (Lisp_Object fn) | |
| 5353 { | |
| 5354 /* This function can GC */ | |
| 5355 struct gcpro gcpro1; | |
| 5356 | |
| 5357 GCPRO1 (fn); | |
| 5358 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5359 } | |
| 5360 | |
| 5361 /* Call function fn with argument arg0 */ | |
| 5362 Lisp_Object | |
| 5363 call1 (Lisp_Object fn, | |
| 5364 Lisp_Object arg0) | |
| 5365 { | |
| 5366 /* This function can GC */ | |
| 5367 struct gcpro gcpro1; | |
| 5368 Lisp_Object args[2]; | |
| 5369 args[0] = fn; | |
| 5370 args[1] = arg0; | |
| 5371 GCPRO1 (args[0]); | |
| 5372 gcpro1.nvars = 2; | |
| 5373 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5374 } | |
| 5375 | |
| 5376 /* Call function fn with arguments arg0, arg1 */ | |
| 5377 Lisp_Object | |
| 5378 call2 (Lisp_Object fn, | |
| 5379 Lisp_Object arg0, Lisp_Object arg1) | |
| 5380 { | |
| 5381 /* This function can GC */ | |
| 5382 struct gcpro gcpro1; | |
| 5383 Lisp_Object args[3]; | |
| 5384 args[0] = fn; | |
| 5385 args[1] = arg0; | |
| 5386 args[2] = arg1; | |
| 5387 GCPRO1 (args[0]); | |
| 5388 gcpro1.nvars = 3; | |
| 5389 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5390 } | |
| 5391 | |
| 5392 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5393 Lisp_Object | |
| 5394 call3 (Lisp_Object fn, | |
| 5395 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5396 { | |
| 5397 /* This function can GC */ | |
| 5398 struct gcpro gcpro1; | |
| 5399 Lisp_Object args[4]; | |
| 5400 args[0] = fn; | |
| 5401 args[1] = arg0; | |
| 5402 args[2] = arg1; | |
| 5403 args[3] = arg2; | |
| 5404 GCPRO1 (args[0]); | |
| 5405 gcpro1.nvars = 4; | |
| 5406 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5407 } | |
| 5408 | |
| 5409 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5410 Lisp_Object | |
| 5411 call4 (Lisp_Object fn, | |
| 5412 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5413 Lisp_Object arg3) | |
| 5414 { | |
| 5415 /* This function can GC */ | |
| 5416 struct gcpro gcpro1; | |
| 5417 Lisp_Object args[5]; | |
| 5418 args[0] = fn; | |
| 5419 args[1] = arg0; | |
| 5420 args[2] = arg1; | |
| 5421 args[3] = arg2; | |
| 5422 args[4] = arg3; | |
| 5423 GCPRO1 (args[0]); | |
| 5424 gcpro1.nvars = 5; | |
| 5425 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5426 } | |
| 5427 | |
| 5428 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5429 Lisp_Object | |
| 5430 call5 (Lisp_Object fn, | |
| 5431 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5432 Lisp_Object arg3, Lisp_Object arg4) | |
| 5433 { | |
| 5434 /* This function can GC */ | |
| 5435 struct gcpro gcpro1; | |
| 5436 Lisp_Object args[6]; | |
| 5437 args[0] = fn; | |
| 5438 args[1] = arg0; | |
| 5439 args[2] = arg1; | |
| 5440 args[3] = arg2; | |
| 5441 args[4] = arg3; | |
| 5442 args[5] = arg4; | |
| 5443 GCPRO1 (args[0]); | |
| 5444 gcpro1.nvars = 6; | |
| 5445 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5446 } | |
| 5447 | |
| 5448 Lisp_Object | |
| 5449 call6 (Lisp_Object fn, | |
| 5450 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5451 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5452 { | |
| 5453 /* This function can GC */ | |
| 5454 struct gcpro gcpro1; | |
| 5455 Lisp_Object args[7]; | |
| 5456 args[0] = fn; | |
| 5457 args[1] = arg0; | |
| 5458 args[2] = arg1; | |
| 5459 args[3] = arg2; | |
| 5460 args[4] = arg3; | |
| 5461 args[5] = arg4; | |
| 5462 args[6] = arg5; | |
| 5463 GCPRO1 (args[0]); | |
| 5464 gcpro1.nvars = 7; | |
| 5465 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5466 } | |
| 5467 | |
| 5468 Lisp_Object | |
| 5469 call7 (Lisp_Object fn, | |
| 5470 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5471 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5472 Lisp_Object arg6) | |
| 5473 { | |
| 5474 /* This function can GC */ | |
| 5475 struct gcpro gcpro1; | |
| 5476 Lisp_Object args[8]; | |
| 5477 args[0] = fn; | |
| 5478 args[1] = arg0; | |
| 5479 args[2] = arg1; | |
| 5480 args[3] = arg2; | |
| 5481 args[4] = arg3; | |
| 5482 args[5] = arg4; | |
| 5483 args[6] = arg5; | |
| 5484 args[7] = arg6; | |
| 5485 GCPRO1 (args[0]); | |
| 5486 gcpro1.nvars = 8; | |
| 5487 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5488 } | |
| 5489 | |
| 5490 Lisp_Object | |
| 5491 call8 (Lisp_Object fn, | |
| 5492 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5493 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5494 Lisp_Object arg6, Lisp_Object arg7) | |
| 5495 { | |
| 5496 /* This function can GC */ | |
| 5497 struct gcpro gcpro1; | |
| 5498 Lisp_Object args[9]; | |
| 5499 args[0] = fn; | |
| 5500 args[1] = arg0; | |
| 5501 args[2] = arg1; | |
| 5502 args[3] = arg2; | |
| 5503 args[4] = arg3; | |
| 5504 args[5] = arg4; | |
| 5505 args[6] = arg5; | |
| 5506 args[7] = arg6; | |
| 5507 args[8] = arg7; | |
| 5508 GCPRO1 (args[0]); | |
| 5509 gcpro1.nvars = 9; | |
| 5510 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5511 } | |
| 5512 | |
| 5513 Lisp_Object | |
| 5514 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5515 { | |
| 5516 if (current_buffer == buf) | |
| 5517 return call0 (fn); | |
| 5518 else | |
| 5519 { | |
| 5520 Lisp_Object val; | |
| 5521 int speccount = specpdl_depth(); | |
| 5522 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5523 set_buffer_internal (buf); | |
| 5524 val = call0 (fn); | |
| 771 | 5525 unbind_to (speccount); |
| 428 | 5526 return val; |
| 5527 } | |
| 5528 } | |
| 5529 | |
| 5530 Lisp_Object | |
| 5531 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5532 Lisp_Object arg0) | |
| 5533 { | |
| 5534 if (current_buffer == buf) | |
| 5535 return call1 (fn, arg0); | |
| 5536 else | |
| 5537 { | |
| 5538 Lisp_Object val; | |
| 5539 int speccount = specpdl_depth(); | |
| 5540 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5541 set_buffer_internal (buf); | |
| 5542 val = call1 (fn, arg0); | |
| 771 | 5543 unbind_to (speccount); |
| 428 | 5544 return val; |
| 5545 } | |
| 5546 } | |
| 5547 | |
| 5548 Lisp_Object | |
| 5549 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5550 Lisp_Object arg0, Lisp_Object arg1) | |
| 5551 { | |
| 5552 if (current_buffer == buf) | |
| 5553 return call2 (fn, arg0, arg1); | |
| 5554 else | |
| 5555 { | |
| 5556 Lisp_Object val; | |
| 5557 int speccount = specpdl_depth(); | |
| 5558 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5559 set_buffer_internal (buf); | |
| 5560 val = call2 (fn, arg0, arg1); | |
| 771 | 5561 unbind_to (speccount); |
| 428 | 5562 return val; |
| 5563 } | |
| 5564 } | |
| 5565 | |
| 5566 Lisp_Object | |
| 5567 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5568 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5569 { | |
| 5570 if (current_buffer == buf) | |
| 5571 return call3 (fn, arg0, arg1, arg2); | |
| 5572 else | |
| 5573 { | |
| 5574 Lisp_Object val; | |
| 5575 int speccount = specpdl_depth(); | |
| 5576 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5577 set_buffer_internal (buf); | |
| 5578 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5579 unbind_to (speccount); |
| 428 | 5580 return val; |
| 5581 } | |
| 5582 } | |
| 5583 | |
| 5584 Lisp_Object | |
| 5585 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5586 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5587 Lisp_Object arg3) | |
| 5588 { | |
| 5589 if (current_buffer == buf) | |
| 5590 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5591 else | |
| 5592 { | |
| 5593 Lisp_Object val; | |
| 5594 int speccount = specpdl_depth(); | |
| 5595 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5596 set_buffer_internal (buf); | |
| 5597 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5598 unbind_to (speccount); |
| 428 | 5599 return val; |
| 5600 } | |
| 5601 } | |
| 5602 | |
| 5603 Lisp_Object | |
| 5604 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5605 { | |
| 5606 if (current_buffer == buf) | |
| 5607 return Feval (form); | |
| 5608 else | |
| 5609 { | |
| 5610 Lisp_Object val; | |
| 5611 int speccount = specpdl_depth(); | |
| 5612 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5613 set_buffer_internal (buf); | |
| 5614 val = Feval (form); | |
| 771 | 5615 unbind_to (speccount); |
| 428 | 5616 return val; |
| 5617 } | |
| 5618 } | |
| 5619 | |
| 5620 | |
| 5621 /************************************************************************/ | |
| 5622 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5623 /************************************************************************/ | |
| 5624 | |
| 853 | 5625 int |
| 5626 get_inhibit_flags (void) | |
| 5627 { | |
| 5628 return inhibit_flags; | |
| 5629 } | |
| 5630 | |
| 5631 void | |
| 2286 | 5632 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5633 { |
| 5634 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5635 { | |
| 5636 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5637 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5638 invalid_change | |
| 5639 ("Modification of this buffer not currently permitted", obj); | |
| 5640 } | |
| 5641 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5642 { | |
| 5643 if (what == OPERATION_DELETE_OBJECT | |
| 5644 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5645 || CONSOLEP (obj)) | |
| 5646 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5647 invalid_change | |
| 5648 ("Deletion of this object not currently permitted", obj); | |
| 5649 } | |
| 5650 } | |
| 5651 | |
| 5652 void | |
| 5653 note_object_created (Lisp_Object obj) | |
| 5654 { | |
| 5655 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5656 { | |
| 5657 if (BUFFERP (obj)) | |
| 5658 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5659 } | |
| 5660 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5661 { | |
| 5662 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5663 || CONSOLEP (obj)) | |
| 5664 Vdeletable_permanent_display_objects = | |
| 5665 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5666 } | |
| 5667 } | |
| 5668 | |
| 5669 void | |
| 5670 note_object_deleted (Lisp_Object obj) | |
| 5671 { | |
| 5672 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5673 { | |
| 5674 if (BUFFERP (obj)) | |
| 5675 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5676 } | |
| 5677 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5678 { | |
| 5679 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5680 || CONSOLEP (obj)) | |
| 5681 Vdeletable_permanent_display_objects = | |
| 5682 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5683 } | |
| 5684 } | |
| 5685 | |
| 5686 struct call_trapping_problems | |
| 5687 { | |
| 5688 Lisp_Object catchtag; | |
| 5689 Lisp_Object error_conditions; | |
| 5690 Lisp_Object data; | |
| 5691 Lisp_Object backtrace; | |
| 5692 Lisp_Object warning_class; | |
| 5693 | |
| 867 | 5694 const CIbyte *warning_string; |
| 853 | 5695 Lisp_Object (*fun) (void *); |
| 5696 void *arg; | |
| 5697 }; | |
| 428 | 5698 |
| 2532 | 5699 static Lisp_Object |
| 5700 maybe_get_trapping_problems_backtrace (void) | |
| 5701 { | |
| 5702 Lisp_Object backtrace; | |
| 853 | 5703 |
| 1123 | 5704 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5705 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5706 { |
| 1333 | 5707 struct gcpro gcpro1; |
| 5708 Lisp_Object lstream = Qnil; | |
| 5709 int speccount = specpdl_depth (); | |
| 5710 | |
| 853 | 5711 /* We're no longer protected against errors or quit here, so at |
| 5712 least let's temporarily inhibit quit. We definitely do not | |
| 5713 want to inhibit quit during the calling of the function | |
| 5714 itself!!!!!!!!!!! */ | |
| 5715 | |
| 5716 specbind (Qinhibit_quit, Qt); | |
| 5717 | |
| 5718 GCPRO1 (lstream); | |
| 5719 lstream = make_resizing_buffer_output_stream (); | |
| 5720 Fbacktrace (lstream, Qt); | |
| 5721 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5722 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5723 Lstream_delete (XLSTREAM (lstream)); |
| 5724 UNGCPRO; | |
| 5725 | |
| 5726 unbind_to (speccount); | |
| 428 | 5727 } |
| 853 | 5728 else |
| 2532 | 5729 backtrace = Qnil; |
| 5730 | |
| 5731 return backtrace; | |
| 5732 } | |
| 5733 | |
| 5734 static DECLARE_DOESNT_RETURN_TYPE | |
| 5735 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5736 | |
| 5737 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5738 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5739 Lisp_Object opaque) | |
| 5740 { | |
| 5741 struct call_trapping_problems *p = | |
| 5742 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5743 | |
| 5744 if (!EQ (error_conditions, Qquit)) | |
| 5745 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5746 else | |
| 853 | 5747 p->backtrace = Qnil; |
| 5748 p->error_conditions = error_conditions; | |
| 5749 p->data = data; | |
| 5750 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5751 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5752 RETURN_NOT_REACHED (Qnil); |
| 853 | 5753 } |
| 5754 | |
| 5755 static Lisp_Object | |
| 5756 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5757 { | |
| 5758 struct call_trapping_problems *p = | |
| 5759 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5760 | |
| 5761 return (p->fun) (p->arg); | |
| 428 | 5762 } |
| 5763 | |
| 5764 static Lisp_Object | |
| 853 | 5765 call_trapping_problems_1 (Lisp_Object opaque) |
| 5766 { | |
| 5767 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5768 call_trapping_problems_2, opaque); | |
| 5769 } | |
| 5770 | |
| 1333 | 5771 static void |
| 5772 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5773 const CIbyte *warning_string, | |
| 5774 struct call_trapping_problems_result *p) | |
| 5775 { | |
| 5776 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5777 { | |
| 5778 int depth = specpdl_depth (); | |
| 5779 | |
| 5780 /* We're no longer protected against errors or quit here, so at | |
| 5781 least let's temporarily inhibit quit. */ | |
| 5782 specbind (Qinhibit_quit, Qt); | |
| 5783 | |
| 5784 if (p->caught_throw) | |
| 5785 { | |
| 5786 Lisp_Object errstr = | |
| 5787 emacs_sprintf_string_lisp | |
| 2532 | 5788 ("%s: Attempt to throw outside of function:" |
| 5789 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5790 Qnil, 4, |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5791 build_msg_cistring (warning_string ? warning_string : "error"), |
| 2532 | 5792 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5793 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5794 } | |
| 2421 | 5795 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5796 { |
| 5797 Lisp_Object errstr; | |
| 5798 /* #### This should call | |
| 5799 (with-output-to-string (display-error (cons error_conditions | |
| 5800 data)) | |
| 5801 but that stuff is all in Lisp currently. */ | |
| 5802 errstr = | |
| 5803 emacs_sprintf_string_lisp | |
| 5804 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5805 Qnil, 4, | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5806 build_msg_cistring (warning_string ? warning_string : "error"), |
| 1333 | 5807 p->error_conditions, p->data, p->backtrace); |
| 5808 | |
| 5809 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5810 errstr); | |
| 5811 } | |
| 5812 | |
| 5813 unbind_to (depth); | |
| 5814 } | |
| 5815 } | |
| 5816 | |
| 1318 | 5817 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5818 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5819 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5820 use call_trapping_problems() for that. Turn the flags off with | |
| 5821 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5822 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5823 various other flags). */ | |
| 5824 | |
| 5825 int | |
| 5826 set_trapping_problems_flags (int flags) | |
| 5827 { | |
| 5828 int new_inhibit_flags; | |
| 5829 | |
| 5830 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5831 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5832 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5833 | INHIBIT_ENTERING_DEBUGGER | |
| 5834 | INHIBIT_WARNING_ISSUE | |
| 5835 | INHIBIT_GC; | |
| 5836 | |
| 5837 new_inhibit_flags = inhibit_flags | flags; | |
| 5838 if (new_inhibit_flags != inhibit_flags) | |
| 5839 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5840 | |
| 5841 if (flags & INHIBIT_QUIT) | |
| 5842 specbind (Qinhibit_quit, Qt); | |
| 5843 | |
| 5844 if (flags & UNINHIBIT_QUIT) | |
| 5845 begin_do_check_for_quit (); | |
| 5846 | |
| 5847 if (flags & INHIBIT_GC) | |
| 5848 begin_gc_forbidden (); | |
| 5849 | |
| 5850 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5851 inner one creates some buffers/etc., should the outer one be able | |
| 5852 to delete them? I think so, but it means we need to combine rather | |
| 5853 than just reset the value. */ | |
| 5854 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5855 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5856 | |
| 5857 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5858 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5859 | |
| 5860 return flags; | |
| 5861 } | |
| 5862 | |
| 853 | 5863 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5864 can be trapped or inhibited, according to FLAGS. | |
| 5865 | |
| 5866 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5867 the error is caught and a warning is issued, specifying the | |
| 5868 specific error that occurred and a backtrace. In that case, | |
| 5869 WARNING_STRING should be given, and will be printed at the | |
| 5870 beginning of the error to indicate where the error occurred. | |
| 5871 | |
| 5872 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5873 `throw' out of the function being called are trapped, and a warning | |
| 5874 issued. (Again, WARNING_STRING should be given.) | |
| 5875 | |
| 2367 | 5876 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5877 this applies to recursive invocations of call_trapping_problems, too. |
| 5878 | |
| 1333 | 5879 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5880 but values useful for generating a warning are still computed (in | |
| 5881 particular, the backtrace), so that the calling function can issue | |
| 5882 a warning. | |
| 5883 | |
| 853 | 5884 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5885 issued, but at level `debug', which normally is below the minimum | |
| 5886 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5887 be ignored entirely. The user can change this variable, however, | |
| 5888 to see the warnings.) | |
| 5889 | |
| 5890 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5891 given, you are *guaranteed* that there will be no non-local exits | |
| 5892 out of this function. | |
| 5893 | |
| 5894 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5895 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5896 automatically caught as well, and treated as an error; you can | |
| 5897 check for this using EQ (problems->error_conditions, Qquit). | |
| 5898 | |
| 5899 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5900 turned on. (It will abort the code being called, but will still be | |
| 5901 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5902 given.) This is useful when QUIT checking has been turned off by a | |
| 5903 higher-level caller. | |
| 5904 | |
| 5905 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5906 This is useful for Lisp called within redisplay, for example. |
| 853 | 5907 |
| 5908 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5909 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5910 or consoles that were already in existence at the time this function | |
| 5911 was called. (However, it's perfectly legal for code to create a new | |
| 5912 buffer and then delete it.) | |
| 5913 | |
| 5914 #### It might be useful to have a flag that inhibits deletion of a | |
| 5915 specific permanent display object and everything it's attached to | |
| 5916 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5917 attached to. | |
| 5918 | |
| 5919 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5920 code is not allowed to modify the text of any buffers that were | |
| 5921 already in existence at the time this function was called. | |
| 5922 (However, it's perfectly legal for code to create a new buffer and | |
| 5923 then modify its text.) | |
| 5924 | |
| 5925 [These last two flags are implemented using global variables | |
| 5926 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5927 which keep track of a list of all buffers or permanent display | |
| 5928 objects created since the last time one of these flags was set. | |
| 5929 The code that deletes buffers, etc. and modifies buffers checks | |
| 5930 | |
| 5931 (1) if the corresponding flag is set (through the global variable | |
| 5932 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5933 | |
| 5934 (2) if the object to be modified or deleted is not in the | |
| 5935 appropriate list. | |
| 5936 | |
| 5937 If so, it signals an error. | |
| 5938 | |
| 5939 Recursive calls to call_trapping_problems() are allowed. In | |
| 5940 the case of the two flags mentioned above, the current values | |
| 5941 of the global variables are stored in an unwind-protect, and | |
| 5942 they're reset to nil.] | |
| 5943 | |
| 5944 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5945 be entered if an error occurs inside the Lisp code being called, | |
| 5946 even when the user has requested an error. In such case, a warning | |
| 5947 is issued stating that access to the debugger is denied, unless | |
| 5948 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5949 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5950 in such cases either the display is in an inconsistent state or | |
| 5951 doing window operations is explicitly forbidden by the OS, and the | |
| 5952 debugger would causes visual changes on the screen and might create | |
| 5953 another frame. | |
| 5954 | |
| 5955 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5956 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5957 specifiers relating to display, other variables relating to | |
| 5958 display, splitting, deleting, or resizing windows or frames, | |
| 5959 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5960 allowed. This is for things called absolutely in the middle of | |
| 5961 redisplay, which expects things to be *exactly* the same after the | |
| 5962 call as before. This isn't completely implemented and needs to be | |
| 5963 thought out some more to determine exactly what its semantics are. | |
| 5964 For the moment, turning on this flag also turns on | |
| 5965 | |
| 5966 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5967 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5968 INHIBIT_ENTERING_DEBUGGER | |
| 5969 INHIBIT_WARNING_ISSUE | |
| 5970 INHIBIT_GC | |
| 5971 | |
| 5972 #### The following five flags are defined, but unimplemented: | |
| 5973 | |
| 5974 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5975 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5976 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5977 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5978 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5979 | |
| 5980 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5981 call_with_suspended_errors() was invoked. This exists only for | |
| 5982 debugging purposes -- often we want to break when a signal happens, | |
| 5983 but ignore signals from call_with_suspended_errors(), because they | |
| 5984 occur often and for legitimate reasons. | |
| 5985 | |
| 5986 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5987 which exact information about any occurring problems (either an | |
| 5988 error or an attempted throw past this boundary). | |
| 5989 | |
| 5990 If a problem occurred and aborted operation (error, quit, or | |
| 5991 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5992 from the call to (*fun) (arg) is returned. */ | |
| 5993 | |
| 5994 Lisp_Object | |
| 5995 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5996 const CIbyte *warning_string, |
| 853 | 5997 int flags, |
| 5998 struct call_trapping_problems_result *problem, | |
| 5999 Lisp_Object (*fun) (void *), | |
| 6000 void *arg) | |
| 6001 { | |
| 1318 | 6002 int speccount = specpdl_depth (); |
| 853 | 6003 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 6004 struct call_trapping_problems package; | |
| 1333 | 6005 struct call_trapping_problems_result real_problem; |
| 2532 | 6006 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 6007 int thrown = 0; |
| 6008 | |
| 6009 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 6010 assert (!NILP (warning_class)); | |
| 6011 | |
| 6012 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 6013 | |
| 6014 package.warning_class = warning_class; | |
| 6015 package.warning_string = warning_string; | |
| 6016 package.fun = fun; | |
| 6017 package.arg = arg; | |
| 6018 package.catchtag = | |
| 6019 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 6020 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 6021 Qnil; | |
| 6022 package.error_conditions = Qnil; | |
| 6023 package.data = Qnil; | |
| 6024 package.backtrace = Qnil; | |
| 6025 | |
| 1318 | 6026 flags = set_trapping_problems_flags (flags); |
| 853 | 6027 |
| 6028 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 6029 opaque = make_opaque_ptr (&package); | |
| 6030 else | |
| 6031 opaque = Qnil; | |
| 6032 | |
| 6033 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 6034 package.backtrace, opaque); | |
| 6035 | |
| 6036 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 6037 /* We need a catch so that our condition-handler can throw back here | |
| 6038 after printing the warning. (We print the warning in the stack | |
| 6039 context of the error, so we can get a backtrace.) */ | |
| 6040 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 6041 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6042 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 6043 /* We skip over the first wrapper, which traps errors. */ | |
| 6044 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 6045 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6046 else |
| 6047 /* Nothing special. */ | |
| 6048 tem = (fun) (arg); | |
| 6049 | |
| 1333 | 6050 if (!problem) |
| 6051 problem = &real_problem; | |
| 6052 | |
| 6053 if (!thrown) | |
| 853 | 6054 { |
| 1333 | 6055 problem->caught_error = 0; |
| 6056 problem->caught_throw = 0; | |
| 6057 problem->error_conditions = Qnil; | |
| 6058 problem->data = Qnil; | |
| 6059 problem->backtrace = Qnil; | |
| 6060 problem->thrown_tag = Qnil; | |
| 6061 problem->thrown_value = Qnil; | |
| 853 | 6062 } |
| 1333 | 6063 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 6064 { |
| 1333 | 6065 problem->caught_error = 1; |
| 6066 problem->caught_throw = 0; | |
| 6067 problem->error_conditions = package.error_conditions; | |
| 6068 problem->data = package.data; | |
| 6069 problem->backtrace = package.backtrace; | |
| 6070 problem->thrown_tag = Qnil; | |
| 6071 problem->thrown_value = Qnil; | |
| 853 | 6072 } |
| 1333 | 6073 else |
| 6074 { | |
| 6075 problem->caught_error = 0; | |
| 6076 problem->caught_throw = 1; | |
| 6077 problem->error_conditions = Qnil; | |
| 6078 problem->data = Qnil; | |
| 2532 | 6079 problem->backtrace = thrown_backtrace; |
| 1333 | 6080 problem->thrown_tag = thrown_tag; |
| 6081 problem->thrown_value = tem; | |
| 6082 } | |
| 6083 | |
| 6084 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6085 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6086 problem); | |
| 853 | 6087 |
| 6088 if (!NILP (package.catchtag) && | |
| 6089 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6090 free_opaque_ptr (package.catchtag); | |
| 6091 | |
| 6092 if (!NILP (opaque)) | |
| 6093 free_opaque_ptr (opaque); | |
| 6094 | |
| 6095 unbind_to (speccount); | |
| 6096 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6097 } | |
| 6098 | |
| 6099 struct va_call_trapping_problems | |
| 6100 { | |
| 6101 lisp_fn_t fun; | |
| 6102 int nargs; | |
| 6103 Lisp_Object *args; | |
| 6104 }; | |
| 6105 | |
| 6106 static Lisp_Object | |
| 6107 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6108 { | |
| 6109 struct va_call_trapping_problems *ai_no_corrida = | |
| 6110 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6111 Lisp_Object pegar_no_bumbum; | |
| 6112 | |
| 6113 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6114 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6115 return pegar_no_bumbum; | |
| 6116 } | |
| 6117 | |
| 6118 /* #### document me. */ | |
| 6119 | |
| 6120 Lisp_Object | |
| 6121 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6122 const CIbyte *warning_string, |
| 853 | 6123 int flags, |
| 6124 struct call_trapping_problems_result *problem, | |
| 6125 lisp_fn_t fun, int nargs, ...) | |
| 6126 { | |
| 6127 va_list vargs; | |
| 6128 Lisp_Object args[20]; | |
| 6129 int i; | |
| 6130 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6131 struct gcpro gcpro1; | |
| 6132 | |
| 6133 assert (nargs >= 0 && nargs < 20); | |
| 6134 | |
| 6135 va_start (vargs, nargs); | |
| 6136 for (i = 0; i < nargs; i++) | |
| 6137 args[i] = va_arg (vargs, Lisp_Object); | |
| 6138 va_end (vargs); | |
| 6139 | |
| 6140 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6141 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6142 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6143 | |
| 6144 GCPRO1_ARRAY (args, nargs); | |
| 6145 RETURN_UNGCPRO | |
| 6146 (call_trapping_problems | |
| 6147 (warning_class, warning_string, flags, problem, | |
| 6148 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6149 } | |
| 6150 | |
| 6151 /* this is an older interface, barely different from | |
| 6152 va_call_trapping_problems. | |
| 6153 | |
| 6154 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6155 va_call_trapping_problems(). */ | |
| 6156 | |
| 6157 Lisp_Object | |
| 6158 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6159 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6160 int nargs, ...) |
| 6161 { | |
| 6162 va_list vargs; | |
| 6163 Lisp_Object args[20]; | |
| 6164 int i; | |
| 6165 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6166 int flags; | |
| 6167 struct gcpro gcpro1; | |
| 6168 | |
| 1204 | 6169 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6170 assert (!NILP (class_)); | |
| 853 | 6171 assert (nargs >= 0 && nargs < 20); |
| 6172 | |
| 6173 va_start (vargs, nargs); | |
| 6174 for (i = 0; i < nargs; i++) | |
| 6175 args[i] = va_arg (vargs, Lisp_Object); | |
| 6176 va_end (vargs); | |
| 6177 | |
| 6178 /* If error-checking is not disabled, just call the function. */ | |
| 6179 | |
| 6180 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6181 { | |
| 6182 Lisp_Object val; | |
| 6183 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6184 return val; | |
| 6185 } | |
| 6186 | |
| 6187 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6188 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6189 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6190 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6191 else | |
| 6192 { | |
| 6193 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6194 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6195 } | |
| 6196 | |
| 6197 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6198 | |
| 6199 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6200 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6201 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6202 | |
| 6203 GCPRO1_ARRAY (args, nargs); | |
| 6204 { | |
| 6205 Lisp_Object its_way_too_goddamn_late = | |
| 6206 call_trapping_problems | |
| 1204 | 6207 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6208 &fazer_invocacao_atrapalhando_problemas); |
| 6209 UNGCPRO; | |
| 6210 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6211 return retval; | |
| 6212 else | |
| 6213 return its_way_too_goddamn_late; | |
| 6214 } | |
| 6215 } | |
| 6216 | |
| 6217 struct calln_trapping_problems | |
| 6218 { | |
| 6219 int nargs; | |
| 6220 Lisp_Object *args; | |
| 6221 }; | |
| 6222 | |
| 6223 static Lisp_Object | |
| 6224 calln_trapping_problems_1 (void *puta) | |
| 6225 { | |
| 6226 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6227 | |
| 6228 return Ffuncall (p->nargs, p->args); | |
| 428 | 6229 } |
| 6230 | |
| 6231 static Lisp_Object | |
| 853 | 6232 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6233 const CIbyte *warning_string, int flags, |
| 853 | 6234 struct call_trapping_problems_result *problem, |
| 6235 int nargs, Lisp_Object *args) | |
| 6236 { | |
| 6237 struct calln_trapping_problems foo; | |
| 6238 struct gcpro gcpro1; | |
| 6239 | |
| 6240 if (SYMBOLP (args[0])) | |
| 6241 { | |
| 6242 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6243 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6244 { | |
| 6245 if (problem) | |
| 6246 { | |
| 6247 problem->caught_error = 0; | |
| 6248 problem->caught_throw = 0; | |
| 6249 problem->error_conditions = Qnil; | |
| 6250 problem->data = Qnil; | |
| 6251 problem->backtrace = Qnil; | |
| 6252 problem->thrown_tag = Qnil; | |
| 6253 problem->thrown_value = Qnil; | |
| 6254 } | |
| 6255 return Qnil; | |
| 6256 } | |
| 6257 } | |
| 6258 | |
| 6259 foo.nargs = nargs; | |
| 6260 foo.args = args; | |
| 6261 | |
| 6262 GCPRO1_ARRAY (args, nargs); | |
| 6263 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6264 flags, problem, | |
| 6265 calln_trapping_problems_1, | |
| 6266 &foo)); | |
| 6267 } | |
| 6268 | |
| 6269 /* #### fix these functions to follow the calling convention of | |
| 6270 call_trapping_problems! */ | |
| 6271 | |
| 6272 Lisp_Object | |
| 867 | 6273 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6274 int flags) |
| 6275 { | |
| 6276 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6277 &function); | |
| 428 | 6278 } |
| 6279 | |
| 6280 Lisp_Object | |
| 867 | 6281 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6282 Lisp_Object object, int flags) |
| 6283 { | |
| 6284 Lisp_Object args[2]; | |
| 6285 | |
| 6286 args[0] = function; | |
| 6287 args[1] = object; | |
| 6288 | |
| 6289 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6290 args); | |
| 6291 } | |
| 6292 | |
| 6293 Lisp_Object | |
| 867 | 6294 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6295 Lisp_Object object1, Lisp_Object object2, |
| 6296 int flags) | |
| 6297 { | |
| 6298 Lisp_Object args[3]; | |
| 6299 | |
| 6300 args[0] = function; | |
| 6301 args[1] = object1; | |
| 6302 args[2] = object2; | |
| 6303 | |
| 6304 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6305 args); | |
| 6306 } | |
| 6307 | |
| 6308 Lisp_Object | |
| 867 | 6309 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6310 Lisp_Object object1, Lisp_Object object2, |
| 6311 Lisp_Object object3, int flags) | |
| 6312 { | |
| 6313 Lisp_Object args[4]; | |
| 6314 | |
| 6315 args[0] = function; | |
| 6316 args[1] = object1; | |
| 6317 args[2] = object2; | |
| 6318 args[3] = object3; | |
| 6319 | |
| 6320 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6321 args); | |
| 6322 } | |
| 6323 | |
| 6324 Lisp_Object | |
| 867 | 6325 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6326 Lisp_Object object1, Lisp_Object object2, |
| 6327 Lisp_Object object3, Lisp_Object object4, | |
| 6328 int flags) | |
| 6329 { | |
| 6330 Lisp_Object args[5]; | |
| 6331 | |
| 6332 args[0] = function; | |
| 6333 args[1] = object1; | |
| 6334 args[2] = object2; | |
| 6335 args[3] = object3; | |
| 6336 args[4] = object4; | |
| 6337 | |
| 6338 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6339 args); | |
| 6340 } | |
| 6341 | |
| 6342 Lisp_Object | |
| 867 | 6343 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6344 Lisp_Object object1, Lisp_Object object2, |
| 6345 Lisp_Object object3, Lisp_Object object4, | |
| 6346 Lisp_Object object5, int flags) | |
| 6347 { | |
| 6348 Lisp_Object args[6]; | |
| 6349 | |
| 6350 args[0] = function; | |
| 6351 args[1] = object1; | |
| 6352 args[2] = object2; | |
| 6353 args[3] = object3; | |
| 6354 args[4] = object4; | |
| 6355 args[5] = object5; | |
| 6356 | |
| 6357 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6358 args); | |
| 6359 } | |
| 6360 | |
| 6361 struct eval_in_buffer_trapping_problems | |
| 6362 { | |
| 6363 struct buffer *buf; | |
| 6364 Lisp_Object form; | |
| 6365 }; | |
| 6366 | |
| 6367 static Lisp_Object | |
| 6368 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6369 { | |
| 6370 struct eval_in_buffer_trapping_problems *p = | |
| 6371 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6372 | |
| 6373 return eval_in_buffer (p->buf, p->form); | |
| 6374 } | |
| 6375 | |
| 6376 /* #### fix these functions to follow the calling convention of | |
| 6377 call_trapping_problems! */ | |
| 6378 | |
| 6379 Lisp_Object | |
| 867 | 6380 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6381 struct buffer *buf, Lisp_Object form, |
| 6382 int flags) | |
| 6383 { | |
| 6384 struct eval_in_buffer_trapping_problems p; | |
| 6385 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6386 struct gcpro gcpro1, gcpro2; |
| 6387 | |
| 853 | 6388 GCPRO2 (buffer, form); |
| 6389 p.buf = buf; | |
| 6390 p.form = form; | |
| 6391 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6392 eval_in_buffer_trapping_problems_1, | |
| 6393 &p)); | |
| 6394 } | |
| 6395 | |
| 6396 Lisp_Object | |
| 1333 | 6397 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6398 Lisp_Object hook_symbol, |
| 6399 int flags) | |
| 6400 { | |
| 1333 | 6401 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6402 RUN_HOOKS_TO_COMPLETION, |
| 6403 flags); | |
| 428 | 6404 } |
| 6405 | |
| 6406 static Lisp_Object | |
| 853 | 6407 safe_run_hook_trapping_problems_1 (void *puta) |
| 6408 { | |
| 5013 | 6409 Lisp_Object hook = GET_LISP_FROM_VOID (puta); |
| 853 | 6410 |
| 6411 run_hook (hook); | |
| 428 | 6412 return Qnil; |
| 6413 } | |
| 6414 | |
| 853 | 6415 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6416 if an error occurs (but not a quit). */ | |
| 6417 | |
| 428 | 6418 Lisp_Object |
| 1333 | 6419 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6420 Lisp_Object hook_symbol, int flags) | |
| 853 | 6421 { |
| 428 | 6422 Lisp_Object tem; |
| 853 | 6423 struct gcpro gcpro1, gcpro2; |
| 6424 struct call_trapping_problems_result prob; | |
| 428 | 6425 |
| 6426 if (!initialized || preparing_for_armageddon) | |
| 6427 return Qnil; | |
| 6428 tem = find_symbol_value (hook_symbol); | |
| 6429 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6430 return Qnil; | |
| 6431 | |
| 853 | 6432 GCPRO2 (hook_symbol, tem); |
| 1333 | 6433 tem = call_trapping_problems (Qerror, NULL, |
| 6434 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6435 &prob, |
| 6436 safe_run_hook_trapping_problems_1, | |
| 5013 | 6437 STORE_LISP_IN_VOID (hook_symbol)); |
| 1333 | 6438 { |
| 6439 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6440 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6441 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6442 | |
| 6443 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6444 Qquit))) | |
| 6445 { | |
| 6446 Fset (hook_symbol, Qnil); | |
| 6447 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6448 } | |
| 6449 else | |
| 6450 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6451 | |
| 6452 | |
| 6453 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6454 &prob); | |
| 6455 } | |
| 6456 | |
| 6457 UNGCPRO; | |
| 6458 return tem; | |
| 853 | 6459 } |
| 6460 | |
| 6461 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6462 { | |
| 6463 struct buffer *buf; | |
| 6464 int nargs; | |
| 6465 Lisp_Object *args; | |
| 6466 enum run_hooks_condition cond; | |
| 6467 }; | |
| 6468 | |
| 6469 static Lisp_Object | |
| 6470 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6471 { | |
| 6472 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6473 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6474 | |
| 6475 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6476 porra->cond); | |
| 6477 } | |
| 6478 | |
| 6479 /* #### fix these functions to follow the calling convention of | |
| 6480 call_trapping_problems! */ | |
| 428 | 6481 |
| 6482 Lisp_Object | |
| 1333 | 6483 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6484 struct buffer *buf, int nargs, |
| 6485 Lisp_Object *args, | |
| 6486 enum run_hooks_condition cond, | |
| 6487 int flags) | |
| 6488 { | |
| 6489 Lisp_Object sym, val, ret; | |
| 6490 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6491 struct gcpro gcpro1; |
| 1333 | 6492 Lisp_Object hook_name; |
| 6493 Ibyte *hook_str; | |
| 6494 Ibyte *err; | |
| 428 | 6495 |
| 6496 if (!initialized || preparing_for_armageddon) | |
| 853 | 6497 /* We need to bail out of here pronto. */ |
| 428 | 6498 return Qnil; |
| 6499 | |
| 853 | 6500 GCPRO1_ARRAY (args, nargs); |
| 6501 | |
| 6502 sym = args[0]; | |
| 6503 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6504 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6505 | |
| 6506 if (UNBOUNDP (val) || NILP (val)) | |
| 6507 RETURN_UNGCPRO (ret); | |
| 6508 | |
| 6509 diversity_and_distrust.buf = buf; | |
| 6510 diversity_and_distrust.nargs = nargs; | |
| 6511 diversity_and_distrust.args = args; | |
| 6512 diversity_and_distrust.cond = cond; | |
| 6513 | |
| 1333 | 6514 hook_name = XSYMBOL_NAME (args[0]); |
| 6515 hook_str = XSTRING_DATA (hook_name); | |
| 6516 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6517 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6518 RETURN_UNGCPRO |
| 6519 (call_trapping_problems | |
| 1333 | 6520 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6521 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6522 &diversity_and_distrust)); | |
| 428 | 6523 } |
| 6524 | |
| 6525 Lisp_Object | |
| 1333 | 6526 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6527 int nargs, |
| 6528 Lisp_Object *args, | |
| 6529 enum run_hooks_condition cond, | |
| 6530 int flags) | |
| 6531 { | |
| 6532 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6533 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6534 } |
| 6535 | |
| 6536 Lisp_Object | |
| 1333 | 6537 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6538 Lisp_Object hook_var, |
| 6539 int nargs, ...) | |
| 6540 { | |
| 6541 /* This function can GC */ | |
| 6542 struct gcpro gcpro1; | |
| 6543 int i; | |
| 6544 va_list vargs; | |
| 6545 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6546 int flags; | |
| 6547 | |
| 6548 va_start (vargs, nargs); | |
| 6549 funcall_args[0] = hook_var; | |
| 6550 for (i = 0; i < nargs; i++) | |
| 6551 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6552 flags = va_arg (vargs, int); | |
| 6553 va_end (vargs); | |
| 6554 | |
| 6555 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6556 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6557 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6558 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6559 } |
| 6560 | |
| 6561 Lisp_Object | |
| 1333 | 6562 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6563 struct buffer *buf, |
| 6564 Lisp_Object hook_var, | |
| 6565 int nargs, ...) | |
| 6566 { | |
| 6567 /* This function can GC */ | |
| 6568 struct gcpro gcpro1; | |
| 6569 int i; | |
| 6570 va_list vargs; | |
| 6571 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6572 int flags; | |
| 6573 | |
| 6574 va_start (vargs, nargs); | |
| 6575 funcall_args[0] = hook_var; | |
| 6576 for (i = 0; i < nargs; i++) | |
| 6577 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6578 flags = va_arg (vargs, int); | |
| 6579 va_end (vargs); | |
| 6580 | |
| 6581 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6582 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6583 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6584 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6585 } |
| 6586 | |
| 6587 | |
| 6588 /************************************************************************/ | |
| 6589 /* The special binding stack */ | |
| 771 | 6590 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6591 /* When performance is critical, use the macros in backtrace.h. */ |
| 6592 /************************************************************************/ | |
| 6593 | |
| 6594 #define min_max_specpdl_size 400 | |
| 6595 | |
| 6596 void | |
| 647 | 6597 grow_specpdl (EMACS_INT reserved) |
| 6598 { | |
| 6599 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6600 if (size_needed >= max_specpdl_size) |
| 6601 { | |
| 6602 if (max_specpdl_size < min_max_specpdl_size) | |
| 6603 max_specpdl_size = min_max_specpdl_size; | |
| 6604 if (size_needed >= max_specpdl_size) | |
| 6605 { | |
| 1951 | 6606 /* Leave room for some specpdl in the debugger. */ |
| 6607 max_specpdl_size = size_needed + 100; | |
| 6608 if (max_specpdl_size > specpdl_size) | |
| 6609 { | |
| 6610 specpdl_size = max_specpdl_size; | |
| 6611 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6612 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6613 } | |
| 563 | 6614 signal_continuable_error |
| 6615 (Qstack_overflow, | |
| 6616 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6617 } |
| 6618 } | |
| 6619 while (specpdl_size < size_needed) | |
| 6620 { | |
| 6621 specpdl_size *= 2; | |
| 6622 if (specpdl_size > max_specpdl_size) | |
| 6623 specpdl_size = max_specpdl_size; | |
| 6624 } | |
| 6625 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6626 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6627 check_specbind_stack_sanity (); |
| 428 | 6628 } |
| 6629 | |
| 6630 | |
| 6631 /* Handle unbinding buffer-local variables */ | |
| 6632 static Lisp_Object | |
| 6633 specbind_unwind_local (Lisp_Object ovalue) | |
| 6634 { | |
| 6635 Lisp_Object current = Fcurrent_buffer (); | |
| 6636 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6637 Lisp_Object victim = ovalue; |
| 6638 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6639 ovalue = XCDR (victim); | |
| 428 | 6640 |
| 6641 free_cons (victim); | |
| 6642 | |
| 6643 if (NILP (buf)) | |
| 6644 { | |
| 6645 /* Deleted buffer -- do nothing */ | |
| 6646 } | |
| 6647 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6648 { | |
| 6649 /* Was buffer-local when binding was made, now no longer is. | |
| 6650 * (kill-local-variable can do this.) | |
| 6651 * Do nothing in this case. | |
| 6652 */ | |
| 6653 } | |
| 6654 else if (EQ (buf, current)) | |
| 6655 Fset (symbol, ovalue); | |
| 6656 else | |
| 6657 { | |
| 6658 /* Urk! Somebody switched buffers */ | |
| 6659 struct gcpro gcpro1; | |
| 6660 GCPRO1 (current); | |
| 6661 Fset_buffer (buf); | |
| 6662 Fset (symbol, ovalue); | |
| 6663 Fset_buffer (current); | |
| 6664 UNGCPRO; | |
| 6665 } | |
| 6666 return symbol; | |
| 6667 } | |
| 6668 | |
| 6669 static Lisp_Object | |
| 6670 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6671 { | |
| 6672 Lisp_Object current = Fcurrent_buffer (); | |
| 6673 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6674 | |
| 6675 buffer = get_buffer (buffer, 0); | |
| 6676 if (NILP (buffer)) | |
| 6677 { | |
| 6678 /* Deleted buffer -- do nothing */ | |
| 6679 } | |
| 6680 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6681 { | |
| 6682 /* Was buffer-local when binding was made, now no longer is. | |
| 6683 * (kill-local-variable can do this.) | |
| 6684 * Do nothing in this case. | |
| 6685 */ | |
| 6686 } | |
| 6687 else if (EQ (buffer, current)) | |
| 6688 Fkill_local_variable (symbol); | |
| 6689 else | |
| 6690 { | |
| 6691 /* Urk! Somebody switched buffers */ | |
| 6692 struct gcpro gcpro1; | |
| 6693 GCPRO1 (current); | |
| 6694 Fset_buffer (buffer); | |
| 6695 Fkill_local_variable (symbol); | |
| 6696 Fset_buffer (current); | |
| 6697 UNGCPRO; | |
| 6698 } | |
| 6699 return symbol; | |
| 6700 } | |
| 6701 | |
| 6702 | |
| 6703 void | |
| 6704 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6705 { | |
| 6706 SPECBIND (symbol, value); | |
| 853 | 6707 |
| 6708 check_specbind_stack_sanity (); | |
| 428 | 6709 } |
| 6710 | |
| 6711 void | |
| 6712 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6713 { | |
| 6714 int buffer_local = | |
| 6715 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6716 | |
| 6717 if (buffer_local == 0) | |
| 6718 { | |
| 6719 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6720 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6721 } |
| 6722 else if (buffer_local > 0) | |
| 6723 { | |
| 6724 /* Already buffer-local */ | |
| 6725 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6726 find_symbol_value (symbol)); | |
| 6727 specpdl_ptr->func = specbind_unwind_local; | |
| 6728 } | |
| 6729 else | |
| 6730 { | |
| 6731 /* About to become buffer-local */ | |
| 6732 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6733 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6734 } | |
| 6735 | |
| 6736 specpdl_ptr->symbol = symbol; | |
| 6737 specpdl_ptr++; | |
| 6738 specpdl_depth_counter++; | |
| 6739 | |
| 6740 Fset (symbol, value); | |
| 853 | 6741 |
| 6742 check_specbind_stack_sanity (); | |
| 428 | 6743 } |
| 6744 | |
| 771 | 6745 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6746 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6747 before your function returns normally, passing in the integer returned | |
| 6748 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6749 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6750 ignored. #### We should eliminate it entirely. */ | |
| 6751 | |
| 6752 int | |
| 428 | 6753 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6754 Lisp_Object arg) | |
| 6755 { | |
| 6756 SPECPDL_RESERVE (1); | |
| 6757 specpdl_ptr->func = function; | |
| 6758 specpdl_ptr->symbol = Qnil; | |
| 6759 specpdl_ptr->old_value = arg; | |
| 6760 specpdl_ptr++; | |
| 6761 specpdl_depth_counter++; | |
| 853 | 6762 check_specbind_stack_sanity (); |
| 771 | 6763 return specpdl_depth_counter - 1; |
| 6764 } | |
| 6765 | |
| 6766 static Lisp_Object | |
| 802 | 6767 restore_lisp_object (Lisp_Object cons) |
| 6768 { | |
| 5013 | 6769 Lisp_Object laddr = XCAR (cons); |
| 6770 Lisp_Object *addr = (Lisp_Object *) GET_VOID_FROM_LISP (laddr); | |
| 802 | 6771 *addr = XCDR (cons); |
| 853 | 6772 free_cons (cons); |
| 802 | 6773 return Qnil; |
| 6774 } | |
| 6775 | |
| 6776 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6777 by ADDR with the value VAL. */ | |
| 814 | 6778 static int |
| 802 | 6779 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6780 Lisp_Object val) | |
| 6781 { | |
| 5013 | 6782 /* We use a cons rather than a malloc()ed structure because we want the |
| 6783 Lisp object to have garbage-collection protection */ | |
| 6784 Lisp_Object laddr = STORE_VOID_IN_LISP (addr); | |
| 802 | 6785 return record_unwind_protect (restore_lisp_object, |
| 5013 | 6786 noseeum_cons (laddr, val)); |
| 802 | 6787 } |
| 6788 | |
| 6789 /* Similar to specbind() but for any C variable whose value is a | |
| 6790 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6791 pointed to by ADDR to its existing value, and then changes its | |
| 6792 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6793 pass this to unbind_to() after you are done. */ | |
| 6794 int | |
| 6795 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6796 { | |
| 6797 int count = specpdl_depth (); | |
| 6798 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6799 *addr = newval; | |
| 6800 return count; | |
| 6801 } | |
| 6802 | |
| 5013 | 6803 struct restore_int |
| 6804 { | |
| 6805 int *addr; | |
| 802 | 6806 int val; |
| 5013 | 6807 }; |
| 6808 | |
| 6809 static Lisp_Object | |
| 6810 restore_int (Lisp_Object obj) | |
| 6811 { | |
| 6812 struct restore_int *ri = (struct restore_int *) GET_VOID_FROM_LISP (obj); | |
| 6813 *(ri->addr) = ri->val; | |
| 6814 xfree (ri); | |
| 802 | 6815 return Qnil; |
| 6816 } | |
| 6817 | |
| 6818 /* Establish an unwind-protect which will restore the int pointed to | |
| 6819 by ADDR with the value VAL. This function works correctly with | |
| 6820 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6821 int |
| 802 | 6822 record_unwind_protect_restoring_int (int *addr, int val) |
| 6823 { | |
| 5013 | 6824 struct restore_int *ri = xnew (struct restore_int); |
| 6825 ri->addr = addr; | |
| 6826 ri->val = val; | |
| 6827 return record_unwind_protect (restore_int, STORE_VOID_IN_LISP (ri)); | |
| 802 | 6828 } |
| 6829 | |
| 6830 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6831 Sets up an unwind-protect to restore the variable pointed to by | |
| 6832 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6833 Returns the previous value of specpdl_depth(); pass this to | |
| 6834 unbind_to() after you are done. This function works correctly with | |
| 6835 all ints, even those that don't fit into a Lisp integer. */ | |
| 6836 int | |
| 6837 internal_bind_int (int *addr, int newval) | |
| 6838 { | |
| 6839 int count = specpdl_depth (); | |
| 6840 record_unwind_protect_restoring_int (addr, *addr); | |
| 6841 *addr = newval; | |
| 6842 return count; | |
| 6843 } | |
| 6844 | |
| 6845 static Lisp_Object | |
| 771 | 6846 free_pointer (Lisp_Object opaque) |
| 6847 { | |
| 5013 | 6848 void *ptr = GET_VOID_FROM_LISP (opaque); |
| 6849 xfree (ptr); | |
| 771 | 6850 return Qnil; |
| 6851 } | |
| 6852 | |
| 6853 /* Establish an unwind-protect which will free the specified block. | |
| 6854 */ | |
| 6855 int | |
| 6856 record_unwind_protect_freeing (void *ptr) | |
| 6857 { | |
| 5013 | 6858 return record_unwind_protect (free_pointer, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6859 } |
| 6860 | |
| 6861 static Lisp_Object | |
| 6862 free_dynarr (Lisp_Object opaque) | |
| 6863 { | |
| 5013 | 6864 Dynarr_free (GET_VOID_FROM_LISP (opaque)); |
| 771 | 6865 return Qnil; |
| 6866 } | |
| 6867 | |
| 6868 int | |
| 6869 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6870 { | |
| 5013 | 6871 return record_unwind_protect (free_dynarr, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6872 } |
| 428 | 6873 |
| 6874 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6875 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6876 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6877 Lisp_Object |
| 771 | 6878 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6879 { |
| 6880 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6881 check_specbind_stack_sanity (); |
| 428 | 6882 return value; |
| 6883 } | |
| 6884 | |
| 6885 /* Don't call this directly. | |
| 6886 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6887 void | |
| 6888 unbind_to_hairy (int count) | |
| 6889 { | |
| 442 | 6890 ++specpdl_ptr; |
| 6891 ++specpdl_depth_counter; | |
| 6892 | |
| 428 | 6893 while (specpdl_depth_counter != count) |
| 6894 { | |
| 1313 | 6895 Lisp_Object oquit = Qunbound; |
| 6896 | |
| 6897 /* Do this check BEFORE decrementing the values below, because once | |
| 6898 they're decremented, GC protection is lost on | |
| 6899 specpdl_ptr->old_value. */ | |
| 1322 | 6900 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6901 { |
| 6902 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6903 existing QUIT until afterwards. Only do this, however, for | |
| 6904 unwind-protects established by Lisp code, not by C code | |
| 6905 (e.g. free_opaque_ptr() or something), because the act of | |
| 6906 checking for QUIT can cause all sorts of weird things to | |
| 6907 happen, since it churns the event loop -- redisplay, running | |
| 6908 Lisp, etc. Code should not have to worry about this just | |
| 6909 because of establishing an unwind-protect. */ | |
| 6910 check_quit (); /* make Vquit_flag accurate */ | |
| 6911 oquit = Vquit_flag; | |
| 6912 Vquit_flag = Qnil; | |
| 6913 } | |
| 6914 | |
| 428 | 6915 --specpdl_ptr; |
| 6916 --specpdl_depth_counter; | |
| 6917 | |
| 1313 | 6918 /* #### At this point, there is no GC protection on old_value. This |
| 6919 could be a real problem, depending on what unwind-protect function | |
| 6920 is called. It looks like it just so happens that the ones | |
| 6921 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6922 we should look into fixing this. (Many unwind-protect functions | |
| 6923 free values. Is it a problem if freed values are | |
| 6924 GC-protected?) */ | |
| 428 | 6925 if (specpdl_ptr->func != 0) |
| 1313 | 6926 { |
| 6927 /* An unwind-protect */ | |
| 6928 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6929 } | |
| 6930 | |
| 428 | 6931 else |
| 6932 { | |
| 6933 /* We checked symbol for validity when we specbound it, | |
| 6934 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6935 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6936 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6937 sym->value = specpdl_ptr->old_value; | |
| 6938 else | |
| 6939 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6940 } | |
| 6941 | |
| 6942 #if 0 /* martin */ | |
| 6943 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6944 /* There should never be anything here for us to remove. | |
| 6945 If so, it indicates a logic error in Emacs. Catches | |
| 6946 should get removed when a throw or signal occurs, or | |
| 6947 when a catch or condition-case exits normally. But | |
| 6948 it's too dangerous to just remove this code. --ben */ | |
| 6949 | |
| 6950 /* Furthermore, this code is not in FSFmacs!!! | |
| 6951 Braino on mly's part? */ | |
| 6952 /* If we're unwound past the pdlcount of a catch frame, | |
| 6953 that catch can't possibly still be valid. */ | |
| 6954 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6955 { | |
| 6956 catchlist = catchlist->next; | |
| 6957 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6958 } | |
| 6959 #endif | |
| 6960 #endif | |
| 1313 | 6961 |
| 6962 if (!UNBOUNDP (oquit)) | |
| 6963 Vquit_flag = oquit; | |
| 428 | 6964 } |
| 853 | 6965 check_specbind_stack_sanity (); |
| 428 | 6966 } |
| 6967 | |
| 6968 | |
| 6969 | |
| 6970 /* Get the value of symbol's global binding, even if that binding is | |
| 6971 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6972 | |
| 6973 Lisp_Object | |
| 6974 top_level_value (Lisp_Object symbol) | |
| 6975 { | |
| 6976 REGISTER struct specbinding *ptr = specpdl; | |
| 6977 | |
| 6978 CHECK_SYMBOL (symbol); | |
| 6979 for (; ptr != specpdl_ptr; ptr++) | |
| 6980 { | |
| 6981 if (EQ (ptr->symbol, symbol)) | |
| 6982 return ptr->old_value; | |
| 6983 } | |
| 6984 return XSYMBOL (symbol)->value; | |
| 6985 } | |
| 6986 | |
| 6987 #if 0 | |
| 6988 | |
| 6989 Lisp_Object | |
| 6990 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6991 { | |
| 6992 REGISTER struct specbinding *ptr = specpdl; | |
| 6993 | |
| 6994 CHECK_SYMBOL (symbol); | |
| 6995 for (; ptr != specpdl_ptr; ptr++) | |
| 6996 { | |
| 6997 if (EQ (ptr->symbol, symbol)) | |
| 6998 { | |
| 6999 ptr->old_value = newval; | |
| 7000 return newval; | |
| 7001 } | |
| 7002 } | |
| 7003 return Fset (symbol, newval); | |
| 7004 } | |
| 7005 | |
| 7006 #endif /* 0 */ | |
| 7007 | |
| 7008 | |
| 7009 /************************************************************************/ | |
| 7010 /* Backtraces */ | |
| 7011 /************************************************************************/ | |
| 7012 | |
| 7013 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 7014 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 7015 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 7016 */ | |
| 7017 (level, flag)) | |
| 7018 { | |
| 7019 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7020 REGISTER int i; | |
| 7021 | |
| 7022 CHECK_INT (level); | |
| 7023 | |
| 7024 for (i = 0; backlist && i < XINT (level); i++) | |
| 7025 { | |
| 7026 backlist = backlist->next; | |
| 7027 } | |
| 7028 | |
| 7029 if (backlist) | |
| 7030 backlist->debug_on_exit = !NILP (flag); | |
| 7031 | |
| 7032 return flag; | |
| 7033 } | |
| 7034 | |
| 7035 static void | |
| 7036 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 7037 { | |
| 7038 int printing_bindings = 0; | |
| 7039 | |
| 7040 for (; speccount > speclimit; speccount--) | |
| 7041 { | |
| 7042 if (specpdl[speccount - 1].func == 0 | |
| 7043 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7044 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7045 { | |
|
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4846
diff
changeset
|
7046 write_ascstring (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7047 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7048 printing_bindings = 1; | |
| 7049 } | |
| 7050 else | |
| 7051 { | |
|
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diff
changeset
|
7052 if (printing_bindings) write_ascstring (stream, ")\n"); |
|
19a72041c5ed
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diff
changeset
|
7053 write_ascstring (stream, " # (unwind-protect ...)\n"); |
| 428 | 7054 printing_bindings = 0; |
| 7055 } | |
| 7056 } | |
|
4952
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
7057 if (printing_bindings) write_ascstring (stream, ")\n"); |
| 428 | 7058 } |
| 7059 | |
| 1292 | 7060 static Lisp_Object |
| 7061 backtrace_unevalled_args (Lisp_Object *args) | |
| 7062 { | |
| 7063 if (args) | |
| 7064 return *args; | |
| 7065 else | |
|
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Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
7066 return list1 (build_ascstring ("[internal]")); |
| 1292 | 7067 } |
| 7068 | |
| 428 | 7069 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7070 Print a trace of Lisp function calls currently active. | |
| 438 | 7071 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7072 and defaults to the value of `standard-output'. |
| 7073 Optional second arg DETAILED non-nil means show places where currently | |
| 7074 active variable bindings, catches, condition-cases, and | |
| 7075 unwind-protects, as well as function calls, were made. | |
| 428 | 7076 */ |
| 7077 (stream, detailed)) | |
| 7078 { | |
| 7079 /* This function can GC */ | |
| 7080 struct backtrace *backlist = backtrace_list; | |
| 7081 struct catchtag *catches = catchlist; | |
| 7082 int speccount = specpdl_depth(); | |
| 7083 | |
| 7084 int old_nl = print_escape_newlines; | |
| 7085 int old_pr = print_readably; | |
| 7086 Lisp_Object old_level = Vprint_level; | |
| 7087 Lisp_Object oiq = Vinhibit_quit; | |
| 7088 struct gcpro gcpro1, gcpro2; | |
| 7089 | |
| 7090 /* We can't allow quits in here because that could cause the values | |
| 7091 of print_readably and print_escape_newlines to get screwed up. | |
| 7092 Normally we would use a record_unwind_protect but that would | |
| 7093 screw up the functioning of this function. */ | |
| 7094 Vinhibit_quit = Qt; | |
| 7095 | |
| 7096 entering_debugger = 0; | |
| 7097 | |
| 872 | 7098 if (!NILP (detailed)) |
| 7099 Vprint_level = make_int (50); | |
| 7100 else | |
| 7101 Vprint_level = make_int (3); | |
| 428 | 7102 print_readably = 0; |
| 7103 print_escape_newlines = 1; | |
| 7104 | |
| 7105 GCPRO2 (stream, old_level); | |
| 7106 | |
| 1261 | 7107 stream = canonicalize_printcharfun (stream); |
| 428 | 7108 |
| 7109 for (;;) | |
| 7110 { | |
| 7111 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7112 { | |
| 7113 int catchpdl = catches->pdlcount; | |
| 438 | 7114 if (speccount > catchpdl |
| 7115 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7116 /* This is a condition-case catchpoint */ |
| 7117 catchpdl = catchpdl + 1; | |
| 7118 | |
| 7119 backtrace_specials (speccount, catchpdl, stream); | |
| 7120 | |
| 7121 speccount = catches->pdlcount; | |
| 7122 if (catchpdl == speccount) | |
| 7123 { | |
|
4952
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4846
diff
changeset
|
7124 write_ascstring (stream, " # (catch "); |
| 428 | 7125 Fprin1 (catches->tag, stream); |
|
4952
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4846
diff
changeset
|
7126 write_ascstring (stream, " ...)\n"); |
| 428 | 7127 } |
| 7128 else | |
| 7129 { | |
|
4952
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Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
7130 write_ascstring (stream, " # (condition-case ... . "); |
| 428 | 7131 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
|
4952
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parents:
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diff
changeset
|
7132 write_ascstring (stream, ")\n"); |
| 428 | 7133 } |
| 7134 catches = catches->next; | |
| 7135 } | |
| 7136 else if (!backlist) | |
| 7137 break; | |
| 7138 else | |
| 7139 { | |
| 7140 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7141 { | |
| 7142 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7143 speccount = backlist->pdlcount; | |
| 7144 } | |
|
4952
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4846
diff
changeset
|
7145 write_ascstring (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7146 if (backlist->nargs == UNEVALLED) |
| 7147 { | |
| 1292 | 7148 Fprin1 (Fcons (*backlist->function, |
| 7149 backtrace_unevalled_args (backlist->args)), | |
| 7150 stream); | |
|
4952
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Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
7151 write_ascstring (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7152 } |
| 7153 else | |
| 7154 { | |
| 7155 Lisp_Object tem = *backlist->function; | |
| 7156 Fprin1 (tem, stream); /* This can QUIT */ | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7157 write_ascstring (stream, "("); |
| 428 | 7158 if (backlist->nargs == MANY) |
| 7159 { | |
| 7160 int i; | |
| 7161 Lisp_Object tail = Qnil; | |
| 7162 struct gcpro ngcpro1; | |
| 7163 | |
| 7164 NGCPRO1 (tail); | |
| 7165 for (tail = *backlist->args, i = 0; | |
| 7166 !NILP (tail); | |
| 7167 tail = Fcdr (tail), i++) | |
| 7168 { | |
|
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Mule-izing, various fixes related to char * arguments
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parents:
4846
diff
changeset
|
7169 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7170 Fprin1 (Fcar (tail), stream); |
| 7171 } | |
| 7172 NUNGCPRO; | |
| 7173 } | |
| 7174 else | |
| 7175 { | |
| 7176 int i; | |
| 7177 for (i = 0; i < backlist->nargs; i++) | |
| 7178 { | |
| 826 | 7179 if (!i && EQ (tem, Qbyte_code)) |
| 7180 { | |
|
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Mule-izing, various fixes related to char * arguments
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parents:
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diff
changeset
|
7181 write_ascstring (stream, "\"...\""); |
| 826 | 7182 continue; |
| 7183 } | |
|
4952
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Mule-izing, various fixes related to char * arguments
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parents:
4846
diff
changeset
|
7184 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7185 Fprin1 (backlist->args[i], stream); |
| 7186 } | |
| 7187 } | |
|
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changeset
|
7188 write_ascstring (stream, ")\n"); |
| 428 | 7189 } |
| 7190 backlist = backlist->next; | |
| 7191 } | |
| 7192 } | |
| 7193 Vprint_level = old_level; | |
| 7194 print_readably = old_pr; | |
| 7195 print_escape_newlines = old_nl; | |
| 7196 UNGCPRO; | |
| 7197 Vinhibit_quit = oiq; | |
| 7198 return Qnil; | |
| 7199 } | |
| 7200 | |
| 7201 | |
| 444 | 7202 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7203 Return the function and arguments NFRAMES up from current execution point. | |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
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4846
diff
changeset
|
7204 If that frame has not evaluated the arguments yet (or involves a special |
|
755ae5b97edb
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7205 operator), the value is (nil FUNCTION ARG-FORMS...). |
| 428 | 7206 If that frame has evaluated its arguments and called its function already, |
| 7207 the value is (t FUNCTION ARG-VALUES...). | |
| 7208 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7209 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7210 or a lambda expression for macro calls. | |
| 444 | 7211 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7212 */ |
| 7213 (nframes)) | |
| 7214 { | |
| 7215 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7216 REGISTER int i; | |
| 7217 Lisp_Object tem; | |
| 7218 | |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
7219 check_integer_range (nframes, Qzero, make_integer (EMACS_INT_MAX)); |
| 428 | 7220 |
| 7221 /* Find the frame requested. */ | |
| 7222 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7223 backlist = backlist->next; | |
| 7224 | |
| 7225 if (!backlist) | |
| 7226 return Qnil; | |
| 7227 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7228 return Fcons (Qnil, Fcons (*backlist->function, |
| 7229 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7230 else |
| 7231 { | |
| 7232 if (backlist->nargs == MANY) | |
| 7233 tem = *backlist->args; | |
| 7234 else | |
| 7235 tem = Flist (backlist->nargs, backlist->args); | |
| 7236 | |
| 7237 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7238 } | |
| 7239 } | |
| 7240 | |
| 7241 | |
| 7242 /************************************************************************/ | |
| 7243 /* Warnings */ | |
| 7244 /************************************************************************/ | |
| 7245 | |
| 1123 | 7246 static int |
| 7247 warning_will_be_discarded (Lisp_Object level) | |
| 7248 { | |
| 7249 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7250 to avoid excessive consing. */ | |
| 7251 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7252 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7253 } | |
| 7254 | |
| 428 | 7255 void |
| 1204 | 7256 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7257 Lisp_Object obj) |
| 7258 { | |
| 1123 | 7259 if (warning_will_be_discarded (level)) |
| 793 | 7260 return; |
| 1123 | 7261 |
| 1204 | 7262 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7263 if (NILP (Vpending_warnings)) |
| 7264 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7265 else | |
| 7266 { | |
| 7267 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7268 Vpending_warnings_tail = obj; | |
| 7269 } | |
| 7270 } | |
| 7271 | |
| 7272 /* #### This should probably accept Lisp objects; but then we have | |
| 7273 to make sure that Feval() isn't called, since it might not be safe. | |
| 7274 | |
| 7275 An alternative approach is to just pass some non-string type of | |
| 7276 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7277 automatically be called when it is safe to do so. */ | |
| 7278 | |
| 7279 void | |
|
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Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
7280 warn_when_safe (Lisp_Object class_, Lisp_Object level, const Ascbyte *fmt, ...) |
| 428 | 7281 { |
| 7282 Lisp_Object obj; | |
| 7283 va_list args; | |
| 7284 | |
| 1123 | 7285 if (warning_will_be_discarded (level)) |
| 793 | 7286 return; |
| 1123 | 7287 |
| 428 | 7288 va_start (args, fmt); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7289 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 7290 va_end (args); |
| 7291 | |
| 1204 | 7292 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7293 } |
| 7294 | |
| 7295 | |
| 7296 | |
| 7297 | |
| 7298 /************************************************************************/ | |
| 7299 /* Initialization */ | |
| 7300 /************************************************************************/ | |
| 7301 | |
| 7302 void | |
| 7303 syms_of_eval (void) | |
| 7304 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
7305 INIT_LISP_OBJECT (subr); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
7306 INIT_LISP_OBJECT (multiple_value); |
| 442 | 7307 |
| 563 | 7308 DEFSYMBOL (Qinhibit_quit); |
| 7309 DEFSYMBOL (Qautoload); | |
| 7310 DEFSYMBOL (Qdebug_on_error); | |
| 7311 DEFSYMBOL (Qstack_trace_on_error); | |
| 7312 DEFSYMBOL (Qdebug_on_signal); | |
| 7313 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7314 DEFSYMBOL (Qdebugger); | |
| 7315 DEFSYMBOL (Qmacro); | |
| 428 | 7316 defsymbol (&Qand_rest, "&rest"); |
| 7317 defsymbol (&Qand_optional, "&optional"); | |
| 7318 /* Note that the process code also uses Qexit */ | |
| 563 | 7319 DEFSYMBOL (Qexit); |
| 7320 DEFSYMBOL (Qsetq); | |
| 7321 DEFSYMBOL (Qinteractive); | |
| 7322 DEFSYMBOL (Qcommandp); | |
| 7323 DEFSYMBOL (Qdefun); | |
| 7324 DEFSYMBOL (Qprogn); | |
| 7325 DEFSYMBOL (Qvalues); | |
| 7326 DEFSYMBOL (Qdisplay_warning); | |
| 7327 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7328 DEFSYMBOL (Qfinalize_list); |
| 563 | 7329 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7330 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7331 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7332 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7333 |
| 7334 DEFSUBR (For); | |
| 7335 DEFSUBR (Fand); | |
| 7336 DEFSUBR (Fif); | |
| 7337 DEFSUBR_MACRO (Fwhen); | |
| 7338 DEFSUBR_MACRO (Funless); | |
| 7339 DEFSUBR (Fcond); | |
| 7340 DEFSUBR (Fprogn); | |
| 7341 DEFSUBR (Fprog1); | |
| 7342 DEFSUBR (Fprog2); | |
| 7343 DEFSUBR (Fsetq); | |
| 7344 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7345 DEFSUBR (Fquote_maybe); |
| 428 | 7346 DEFSUBR (Ffunction); |
| 7347 DEFSUBR (Fdefun); | |
| 7348 DEFSUBR (Fdefmacro); | |
| 7349 DEFSUBR (Fdefvar); | |
| 7350 DEFSUBR (Fdefconst); | |
| 7351 DEFSUBR (Flet); | |
| 7352 DEFSUBR (FletX); | |
| 7353 DEFSUBR (Fwhile); | |
| 7354 DEFSUBR (Fmacroexpand_internal); | |
| 7355 DEFSUBR (Fcatch); | |
| 7356 DEFSUBR (Fthrow); | |
| 7357 DEFSUBR (Funwind_protect); | |
| 7358 DEFSUBR (Fcondition_case); | |
| 7359 DEFSUBR (Fcall_with_condition_handler); | |
| 7360 DEFSUBR (Fsignal); | |
| 7361 DEFSUBR (Finteractive_p); | |
| 7362 DEFSUBR (Fcommandp); | |
| 7363 DEFSUBR (Fcommand_execute); | |
| 7364 DEFSUBR (Fautoload); | |
| 7365 DEFSUBR (Feval); | |
| 7366 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7367 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7368 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7369 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7370 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7371 DEFSUBR (Fvalues_list); |
| 428 | 7372 DEFSUBR (Ffuncall); |
| 7373 DEFSUBR (Ffunctionp); | |
| 7374 DEFSUBR (Ffunction_min_args); | |
| 7375 DEFSUBR (Ffunction_max_args); | |
| 7376 DEFSUBR (Frun_hooks); | |
| 7377 DEFSUBR (Frun_hook_with_args); | |
| 7378 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7379 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7380 DEFSUBR (Fbacktrace_debug); | |
| 7381 DEFSUBR (Fbacktrace); | |
| 7382 DEFSUBR (Fbacktrace_frame); | |
| 7383 } | |
| 7384 | |
| 7385 void | |
| 814 | 7386 init_eval_semi_early (void) |
| 428 | 7387 { |
| 7388 specpdl_ptr = specpdl; | |
| 7389 specpdl_depth_counter = 0; | |
| 7390 catchlist = 0; | |
| 7391 Vcondition_handlers = Qnil; | |
| 7392 backtrace_list = 0; | |
| 7393 Vquit_flag = Qnil; | |
| 7394 debug_on_next_call = 0; | |
| 7395 lisp_eval_depth = 0; | |
| 7396 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7397 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7398 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7399 multiple_value_current_limit = 1; |
| 428 | 7400 } |
| 7401 | |
| 7402 void | |
| 7403 reinit_vars_of_eval (void) | |
| 7404 { | |
| 7405 preparing_for_armageddon = 0; | |
| 7406 in_warnings = 0; | |
| 7407 specpdl_size = 50; | |
| 7408 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7409 /* XEmacs change: increase these values. */ | |
| 7410 max_specpdl_size = 3000; | |
| 442 | 7411 max_lisp_eval_depth = 1000; |
| 7412 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7413 throw_level = 0; |
| 7414 #endif | |
| 2367 | 7415 init_eval_semi_early (); |
| 428 | 7416 } |
| 7417 | |
| 7418 void | |
| 7419 vars_of_eval (void) | |
| 7420 { | |
| 7421 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7422 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7423 */ ); | |
| 7424 | |
| 7425 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7426 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7427 This limit is to catch infinite recursions for you before they cause | |
| 7428 actual stack overflow in C, which would be fatal for Emacs. | |
| 7429 You can safely make it considerably larger than its default value, | |
| 7430 if that proves inconveniently small. | |
| 7431 */ ); | |
| 7432 | |
| 7433 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7434 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7435 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7436 Normally, you do not need to set this value yourself. It is set to | |
| 7437 t each time a Control-G is detected, and to `critical' each time a | |
| 7438 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7439 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7440 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7441 it's correct to do so. |
| 428 | 7442 */ ); |
| 7443 Vquit_flag = Qnil; | |
| 7444 | |
| 7445 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7446 Non-nil inhibits C-g quitting from happening immediately. | |
| 7447 Note that `quit-flag' will still be set by typing C-g, | |
| 7448 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7449 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7450 before making `inhibit-quit' nil. |
| 7451 | |
| 7452 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7453 requested by typing control-shift-G in a window-system frame; | |
| 7454 this is explained in more detail in `quit-flag'. | |
| 428 | 7455 */ ); |
| 7456 Vinhibit_quit = Qnil; | |
| 7457 | |
| 7458 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7459 *Non-nil means automatically display a backtrace buffer | |
| 7460 after any error that is not handled by a `condition-case'. | |
| 7461 If the value is a list, an error only means to display a backtrace | |
| 7462 if one of its condition symbols appears in the list. | |
| 7463 See also variable `stack-trace-on-signal'. | |
| 7464 */ ); | |
| 7465 Vstack_trace_on_error = Qnil; | |
| 7466 | |
| 7467 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7468 *Non-nil means automatically display a backtrace buffer | |
| 7469 after any error that is signalled, whether or not it is handled by | |
| 7470 a `condition-case'. | |
| 7471 If the value is a list, an error only means to display a backtrace | |
| 7472 if one of its condition symbols appears in the list. | |
| 7473 See also variable `stack-trace-on-error'. | |
| 7474 */ ); | |
| 7475 Vstack_trace_on_signal = Qnil; | |
| 7476 | |
| 7477 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7478 *List of errors for which the debugger should not be called. | |
| 7479 Each element may be a condition-name or a regexp that matches error messages. | |
| 7480 If any element applies to a given error, that error skips the debugger | |
| 7481 and just returns to top level. | |
| 7482 This overrides the variable `debug-on-error'. | |
| 7483 It does not apply to errors handled by `condition-case'. | |
| 7484 */ ); | |
| 7485 Vdebug_ignored_errors = Qnil; | |
| 7486 | |
| 7487 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7488 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7489 The debugger will not be entered if the error is handled by | |
| 7490 a `condition-case'. | |
| 7491 If the value is a list, an error only means to enter the debugger | |
| 7492 if one of its condition symbols appears in the list. | |
| 7493 This variable is overridden by `debug-ignored-errors'. | |
| 7494 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7495 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7496 Process filters are considered to be outside of condition-case forms |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7497 (unless contained in the process filter itself). To prevent the |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7498 debugger from being called from a process filter, use a list value, or |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7499 put the expected error\(s) in `debug-ignored-errors'. |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7500 |
| 1123 | 7501 If this variable is set while XEmacs is running noninteractively (using |
| 7502 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7503 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7504 obviously won't work), XEmacs will break out to a C debugger using | |
| 7505 \(force-debugging-signal t). This is useful because debugging | |
| 7506 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7507 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7508 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7509 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7510 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7511 is about to die anyway, and if no debugger is present, this will usefully | |
| 7512 dump core.) The most useful way to set this flag when debugging | |
| 7513 noninteractive runs, especially in makefiles, is using the environment | |
| 7514 variable XEMACSDEBUG, like this: | |
| 771 | 7515 |
| 7516 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7517 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7518 */ ); |
| 7519 Vdebug_on_error = Qnil; | |
| 7520 | |
| 7521 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7522 *Non-nil means enter debugger if an error is signalled. | |
| 7523 The debugger will be entered whether or not the error is handled by | |
| 7524 a `condition-case'. | |
| 7525 If the value is a list, an error only means to enter the debugger | |
| 7526 if one of its condition symbols appears in the list. | |
| 7527 See also variable `debug-on-quit'. | |
| 1123 | 7528 |
| 7529 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7530 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7531 */ ); |
| 7532 Vdebug_on_signal = Qnil; | |
| 7533 | |
| 7534 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7535 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7536 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7537 debugger can also be achieved at any time (for X11 console) by typing | |
| 7538 control-shift-G to signal a critical quit. | |
| 7539 */ ); | |
| 7540 debug_on_quit = 0; | |
| 7541 | |
| 7542 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7543 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7544 */ ); | |
| 7545 | |
| 1292 | 7546 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7547 &backtrace_with_internal_sections /* | |
| 7548 Non-nil means backtraces will contain additional information indicating | |
| 7549 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7550 byte-char conversion, internal-external conversion, etc. This can be | |
| 7551 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7552 */ ); | |
| 7553 #ifdef ERROR_CHECK_STRUCTURES | |
| 7554 backtrace_with_internal_sections = 1; | |
| 7555 #else | |
| 7556 backtrace_with_internal_sections = 0; | |
| 7557 #endif | |
| 7558 | |
| 428 | 7559 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7560 Function to call to invoke debugger. | |
| 7561 If due to frame exit, args are `exit' and the value being returned; | |
| 7562 this function's value will be returned instead of that. | |
| 7563 If due to error, args are `error' and a list of the args to `signal'. | |
| 7564 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7565 If due to `eval' entry, one arg, t. | |
| 7566 */ ); | |
| 7567 Vdebugger = Qnil; | |
| 7568 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7569 DEFVAR_CONST_INT ("multiple-values-limit", &Vmultiple_values_limit /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7570 The exclusive upper bound on the number of multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7571 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7572 This applies to `values', `values-list', `multiple-value-bind' and related |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7573 macros and special operators. |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7574 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7575 Vmultiple_values_limit = EMACS_INT_MAX > INT_MAX ? INT_MAX : EMACS_INT_MAX; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7576 |
| 853 | 7577 staticpro (&Vcatch_everything_tag); |
| 7578 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7579 | |
| 428 | 7580 staticpro (&Vpending_warnings); |
| 7581 Vpending_warnings = Qnil; | |
| 1204 | 7582 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7583 Vpending_warnings_tail = Qnil; |
| 7584 | |
| 793 | 7585 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7586 Vlog_warning_minimum_level = Qinfo; | |
| 7587 | |
| 428 | 7588 staticpro (&Vautoload_queue); |
| 7589 Vautoload_queue = Qnil; | |
| 7590 | |
| 7591 staticpro (&Vcondition_handlers); | |
| 7592 | |
| 853 | 7593 staticpro (&Vdeletable_permanent_display_objects); |
| 7594 Vdeletable_permanent_display_objects = Qnil; | |
| 7595 | |
| 7596 staticpro (&Vmodifiable_buffers); | |
| 7597 Vmodifiable_buffers = Qnil; | |
| 7598 | |
| 7599 inhibit_flags = 0; | |
| 7600 } |