Mercurial > hg > xemacs-beta
annotate src/eval.c @ 5118:e0db3c197671 ben-lisp-object
merge up to latest default branch, doesn't compile yet
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sat, 26 Dec 2009 21:18:49 -0600 |
| parents | 3742ea8250b5 17f7e9191c0b |
| children | 623d57b7fbe8 |
| 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. | |
| 2421 | 4 Copyright (C) 2000, 2001, 2002, 2003, 2004 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 |
| 421 /************************************************************************/ | |
| 422 /* The subr object type */ | |
| 423 /************************************************************************/ | |
| 424 | |
| 425 static void | |
| 2286 | 426 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag)) |
| 428 | 427 { |
| 428 Lisp_Subr *subr = XSUBR (obj); | |
| 867 | 429 const CIbyte *header = |
| 428 | 430 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr "; |
| 867 | 431 const CIbyte *name = subr_name (subr); |
| 432 const CIbyte *trailer = subr->prompt ? " (interactive)>" : ">"; | |
| 428 | 433 |
| 434 if (print_readably) | |
| 563 | 435 printing_unreadable_object ("%s%s%s", header, name, trailer); |
| 428 | 436 |
| 826 | 437 write_c_string (printcharfun, header); |
| 438 write_c_string (printcharfun, name); | |
| 439 write_c_string (printcharfun, trailer); | |
| 428 | 440 } |
| 441 | |
| 1204 | 442 static const struct memory_description subr_description[] = { |
| 2551 | 443 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 428 | 444 { XD_END } |
| 445 }; | |
| 446 | |
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447 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("subr", subr, |
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448 0, print_subr, 0, 0, 0, |
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449 subr_description, |
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450 Lisp_Subr); |
| 428 | 451 |
| 452 /************************************************************************/ | |
| 453 /* Entering the debugger */ | |
| 454 /************************************************************************/ | |
| 455 | |
| 853 | 456 static Lisp_Object |
| 457 current_warning_level (void) | |
| 458 { | |
| 459 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL) | |
| 460 return Qdebug; | |
| 461 else | |
| 462 return Qwarning; | |
| 463 } | |
| 464 | |
| 428 | 465 /* Actually call the debugger. ARG is a list of args that will be |
| 466 passed to the debugger function, as follows; | |
| 467 | |
| 468 If due to frame exit, args are `exit' and the value being returned; | |
| 469 this function's value will be returned instead of that. | |
| 470 If due to error, args are `error' and a list of the args to `signal'. | |
| 471 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 472 If due to `eval' entry, one arg, t. | |
| 473 | |
| 474 */ | |
| 475 | |
| 476 static Lisp_Object | |
| 477 call_debugger_259 (Lisp_Object arg) | |
| 478 { | |
| 479 return apply1 (Vdebugger, arg); | |
| 480 } | |
| 481 | |
| 482 /* Call the debugger, doing some encapsulation. We make sure we have | |
| 483 some room on the eval and specpdl stacks, and bind entering_debugger | |
| 484 to 1 during this call. This is used to trap errors that may occur | |
| 485 when entering the debugger (e.g. the value of `debugger' is invalid), | |
| 486 so that the debugger will not be recursively entered if debug-on-error | |
| 487 is set. (Otherwise, XEmacs would infinitely recurse, attempting to | |
| 488 enter the debugger.) entering_debugger gets reset to 0 as soon | |
| 489 as a backtrace is displayed, so that further errors can indeed be | |
| 490 handled normally. | |
| 491 | |
| 3025 | 492 We also establish a catch for `debugger'. If the debugger function |
| 428 | 493 throws to this instead of returning a value, it means that the user |
| 494 pressed 'c' (pretend like the debugger was never entered). The | |
| 495 function then returns Qunbound. (If the user pressed 'r', for | |
| 496 return a value, then the debugger function returns normally with | |
| 497 this value.) | |
| 498 | |
| 499 The difference between 'c' and 'r' is as follows: | |
| 500 | |
| 501 debug-on-call: | |
| 502 No difference. The call proceeds as normal. | |
| 503 debug-on-exit: | |
| 504 With 'r', the specified value is returned as the function's | |
| 505 return value. With 'c', the value that would normally be | |
| 506 returned is returned. | |
| 507 signal: | |
| 508 With 'r', the specified value is returned as the return | |
| 509 value of `signal'. (This is the only time that `signal' | |
| 510 can return, instead of making a non-local exit.) With `c', | |
| 511 `signal' will continue looking for handlers as if the | |
| 512 debugger was never entered, and will probably end up | |
| 513 throwing to a handler or to top-level. | |
| 514 */ | |
| 515 | |
| 516 static Lisp_Object | |
| 517 call_debugger (Lisp_Object arg) | |
| 518 { | |
| 519 int threw; | |
| 520 Lisp_Object val; | |
| 521 int speccount; | |
| 522 | |
| 853 | 523 debug_on_next_call = 0; |
| 524 | |
| 525 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER) | |
| 526 { | |
| 527 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE)) | |
| 528 warn_when_safe | |
| 529 (Qdebugger, current_warning_level (), | |
| 530 "Unable to enter debugger within critical section"); | |
| 531 return Qunbound; | |
| 532 } | |
| 533 | |
| 428 | 534 if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
| 535 max_lisp_eval_depth = lisp_eval_depth + 20; | |
| 536 if (specpdl_size + 40 > max_specpdl_size) | |
| 537 max_specpdl_size = specpdl_size + 40; | |
| 853 | 538 |
| 539 speccount = internal_bind_int (&entering_debugger, 1); | |
| 2532 | 540 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0, 0); |
| 428 | 541 |
| 771 | 542 return unbind_to_1 (speccount, ((threw) |
| 428 | 543 ? Qunbound /* Not returning a value */ |
| 544 : val)); | |
| 545 } | |
| 546 | |
| 547 /* Called when debug-on-exit behavior is called for. Enter the debugger | |
| 548 with the appropriate args for this. VAL is the exit value that is | |
| 549 about to be returned. */ | |
| 550 | |
| 551 static Lisp_Object | |
| 552 do_debug_on_exit (Lisp_Object val) | |
| 553 { | |
| 554 /* This is falsified by call_debugger */ | |
| 555 Lisp_Object v = call_debugger (list2 (Qexit, val)); | |
| 556 | |
| 557 return !UNBOUNDP (v) ? v : val; | |
| 558 } | |
| 559 | |
| 560 /* Called when debug-on-call behavior is called for. Enter the debugger | |
| 561 with the appropriate args for this. VAL is either t for a call | |
| 3025 | 562 through `eval' or `lambda' for a call through `funcall'. |
| 428 | 563 |
| 564 #### The differentiation here between EVAL and FUNCALL is bogus. | |
| 565 FUNCALL can be defined as | |
| 566 | |
| 567 (defmacro func (fun &rest args) | |
| 568 (cons (eval fun) args)) | |
| 569 | |
| 570 and should be treated as such. | |
| 571 */ | |
| 572 | |
| 573 static void | |
| 574 do_debug_on_call (Lisp_Object code) | |
| 575 { | |
| 576 debug_on_next_call = 0; | |
| 577 backtrace_list->debug_on_exit = 1; | |
| 578 call_debugger (list1 (code)); | |
| 579 } | |
| 580 | |
| 581 /* LIST is the value of one of the variables `debug-on-error', | |
| 582 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal', | |
| 583 and CONDITIONS is the list of error conditions associated with | |
| 584 the error being signalled. This returns non-nil if LIST | |
| 585 matches CONDITIONS. (A nil value for LIST does not match | |
| 586 CONDITIONS. A non-list value for LIST does match CONDITIONS. | |
| 587 A list matches CONDITIONS when one of the symbols in LIST is the | |
| 588 same as one of the symbols in CONDITIONS.) */ | |
| 589 | |
| 590 static int | |
| 591 wants_debugger (Lisp_Object list, Lisp_Object conditions) | |
| 592 { | |
| 593 if (NILP (list)) | |
| 594 return 0; | |
| 595 if (! CONSP (list)) | |
| 596 return 1; | |
| 597 | |
| 598 while (CONSP (conditions)) | |
| 599 { | |
| 2552 | 600 Lisp_Object curr, tail; |
| 601 curr = XCAR (conditions); | |
| 428 | 602 for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 2552 | 603 if (EQ (XCAR (tail), curr)) |
| 428 | 604 return 1; |
| 605 conditions = XCDR (conditions); | |
| 606 } | |
| 607 return 0; | |
| 608 } | |
| 609 | |
| 610 | |
| 611 /* Return 1 if an error with condition-symbols CONDITIONS, | |
| 612 and described by SIGNAL-DATA, should skip the debugger | |
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613 according to debug-ignored-errors. */ |
| 428 | 614 |
| 615 static int | |
| 616 skip_debugger (Lisp_Object conditions, Lisp_Object data) | |
| 617 { | |
| 618 /* This function can GC */ | |
| 619 Lisp_Object tail; | |
| 620 int first_string = 1; | |
| 621 Lisp_Object error_message = Qnil; | |
| 622 | |
| 623 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
| 624 { | |
| 625 if (STRINGP (XCAR (tail))) | |
| 626 { | |
| 627 if (first_string) | |
| 628 { | |
| 629 error_message = Ferror_message_string (data); | |
| 630 first_string = 0; | |
| 631 } | |
| 632 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0) | |
| 633 return 1; | |
| 634 } | |
| 635 else | |
| 636 { | |
| 637 Lisp_Object contail; | |
| 638 | |
| 639 for (contail = conditions; CONSP (contail); contail = XCDR (contail)) | |
| 640 if (EQ (XCAR (tail), XCAR (contail))) | |
| 641 return 1; | |
| 642 } | |
| 643 } | |
| 644 | |
| 645 return 0; | |
| 646 } | |
| 647 | |
| 648 /* Actually generate a backtrace on STREAM. */ | |
| 649 | |
| 650 static Lisp_Object | |
| 651 backtrace_259 (Lisp_Object stream) | |
| 652 { | |
| 653 return Fbacktrace (stream, Qt); | |
| 654 } | |
| 655 | |
| 1130 | 656 #ifdef DEBUG_XEMACS |
| 657 | |
| 658 static void | |
| 659 trace_out_and_die (Lisp_Object err) | |
| 660 { | |
| 661 Fdisplay_error (err, Qt); | |
| 662 backtrace_259 (Qnil); | |
| 663 stderr_out ("XEmacs exiting to debugger.\n"); | |
| 664 Fforce_debugging_signal (Qt); | |
| 665 /* Unlikely to be reached */ | |
| 666 } | |
| 667 | |
| 668 #endif | |
| 669 | |
| 428 | 670 /* An error was signaled. Maybe call the debugger, if the `debug-on-error' |
| 671 etc. variables call for this. CONDITIONS is the list of conditions | |
| 672 associated with the error being signalled. SIG is the actual error | |
| 673 being signalled, and DATA is the associated data (these are exactly | |
| 674 the same as the arguments to `signal'). ACTIVE_HANDLERS is the | |
| 675 list of error handlers that are to be put in place while the debugger | |
| 676 is called. This is generally the remaining handlers that are | |
| 677 outside of the innermost handler trapping this error. This way, | |
| 678 if the same error occurs inside of the debugger, you usually don't get | |
| 679 the debugger entered recursively. | |
| 680 | |
| 681 This function returns Qunbound if it didn't call the debugger or if | |
| 682 the user asked (through 'c') that XEmacs should pretend like the | |
| 683 debugger was never entered. Otherwise, it returns the value | |
| 684 that the user specified with `r'. (Note that much of the time, | |
| 685 the user will abort with C-], and we will never have a chance to | |
| 686 return anything at all.) | |
| 687 | |
| 688 SIGNAL_VARS_ONLY means we should only look at debug-on-signal | |
| 689 and stack-trace-on-signal to control whether we do anything. | |
| 690 This is so that debug-on-error doesn't make handled errors | |
| 691 cause the debugger to get invoked. | |
| 692 | |
| 693 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that | |
| 694 those functions aren't done more than once in a single `signal' | |
| 695 session. */ | |
| 696 | |
| 697 static Lisp_Object | |
| 698 signal_call_debugger (Lisp_Object conditions, | |
| 699 Lisp_Object sig, Lisp_Object data, | |
| 700 Lisp_Object active_handlers, | |
| 701 int signal_vars_only, | |
| 702 int *stack_trace_displayed, | |
| 703 int *debugger_entered) | |
| 704 { | |
| 853 | 705 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 706 /* This function can GC */ |
| 853 | 707 #else /* reality check */ |
| 708 /* This function cannot GC because it inhibits GC during its operation */ | |
| 709 #endif | |
| 710 | |
| 428 | 711 Lisp_Object val = Qunbound; |
| 712 Lisp_Object all_handlers = Vcondition_handlers; | |
| 713 Lisp_Object temp_data = Qnil; | |
| 853 | 714 int outer_speccount = specpdl_depth(); |
| 715 int speccount; | |
| 716 | |
| 717 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE | |
| 428 | 718 struct gcpro gcpro1, gcpro2; |
| 719 GCPRO2 (all_handlers, temp_data); | |
| 853 | 720 #else |
| 721 begin_gc_forbidden (); | |
| 722 #endif | |
| 723 | |
| 724 speccount = specpdl_depth(); | |
| 428 | 725 |
| 726 Vcondition_handlers = active_handlers; | |
| 727 | |
| 728 temp_data = Fcons (sig, data); /* needed for skip_debugger */ | |
| 729 | |
| 730 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only | |
| 731 && wants_debugger (Vstack_trace_on_error, conditions) | |
| 732 && !skip_debugger (conditions, temp_data)) | |
| 733 { | |
| 734 specbind (Qdebug_on_error, Qnil); | |
| 735 specbind (Qstack_trace_on_error, Qnil); | |
| 736 specbind (Qdebug_on_signal, Qnil); | |
| 737 specbind (Qstack_trace_on_signal, Qnil); | |
| 738 | |
| 442 | 739 if (!noninteractive) |
| 740 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"), | |
| 741 backtrace_259, | |
| 742 Qnil, | |
| 743 Qnil); | |
| 744 else /* in batch mode, we want this going to stderr. */ | |
| 745 backtrace_259 (Qnil); | |
| 771 | 746 unbind_to (speccount); |
| 428 | 747 *stack_trace_displayed = 1; |
| 748 } | |
| 749 | |
| 750 if (!entering_debugger && !*debugger_entered && !signal_vars_only | |
| 751 && (EQ (sig, Qquit) | |
| 752 ? debug_on_quit | |
| 753 : wants_debugger (Vdebug_on_error, conditions)) | |
| 754 && !skip_debugger (conditions, temp_data)) | |
| 755 { | |
| 756 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 757 |
| 428 | 758 specbind (Qdebug_on_error, Qnil); |
| 759 specbind (Qstack_trace_on_error, Qnil); | |
| 760 specbind (Qdebug_on_signal, Qnil); | |
| 761 specbind (Qstack_trace_on_signal, Qnil); | |
| 762 | |
| 1130 | 763 #ifdef DEBUG_XEMACS |
| 764 if (noninteractive) | |
| 765 trace_out_and_die (Fcons (sig, data)); | |
| 766 #endif | |
| 767 | |
| 428 | 768 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 853 | 769 unbind_to (speccount); |
| 428 | 770 *debugger_entered = 1; |
| 771 } | |
| 772 | |
| 773 if (!entering_debugger && !*stack_trace_displayed | |
| 774 && wants_debugger (Vstack_trace_on_signal, conditions)) | |
| 775 { | |
| 776 specbind (Qdebug_on_error, Qnil); | |
| 777 specbind (Qstack_trace_on_error, Qnil); | |
| 778 specbind (Qdebug_on_signal, Qnil); | |
| 779 specbind (Qstack_trace_on_signal, Qnil); | |
| 780 | |
| 442 | 781 if (!noninteractive) |
| 782 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"), | |
| 783 backtrace_259, | |
| 784 Qnil, | |
| 785 Qnil); | |
| 786 else /* in batch mode, we want this going to stderr. */ | |
| 787 backtrace_259 (Qnil); | |
| 771 | 788 unbind_to (speccount); |
| 428 | 789 *stack_trace_displayed = 1; |
| 790 } | |
| 791 | |
| 792 if (!entering_debugger && !*debugger_entered | |
| 793 && (EQ (sig, Qquit) | |
| 794 ? debug_on_quit | |
| 795 : wants_debugger (Vdebug_on_signal, conditions))) | |
| 796 { | |
| 797 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 798 |
| 428 | 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 | |
| 1130 | 804 #ifdef DEBUG_XEMACS |
| 805 if (noninteractive) | |
| 806 trace_out_and_die (Fcons (sig, data)); | |
| 807 #endif | |
| 808 | |
| 428 | 809 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 810 *debugger_entered = 1; | |
| 811 } | |
| 812 | |
| 853 | 813 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 814 UNGCPRO; |
| 853 | 815 #endif |
| 428 | 816 Vcondition_handlers = all_handlers; |
| 853 | 817 return unbind_to_1 (outer_speccount, val); |
| 428 | 818 } |
| 819 | |
| 820 | |
| 821 /************************************************************************/ | |
| 822 /* The basic special forms */ | |
| 823 /************************************************************************/ | |
| 824 | |
| 825 /* Except for Fprogn(), the basic special forms below are only called | |
| 826 from interpreted code. The byte compiler turns them into bytecodes. */ | |
| 827 | |
| 828 DEFUN ("or", For, 0, UNEVALLED, 0, /* | |
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829 Eval ARGS until one of them yields non-nil, then return that value. |
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830 The remaining ARGS are not evalled at all. |
| 428 | 831 If all args return nil, return nil. |
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832 |
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833 Any multiple values from the last form, and only from the last form, are |
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834 passed back. See `values' and `multiple-value-bind'. |
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835 |
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836 arguments: (&rest ARGS) |
| 428 | 837 */ |
| 838 (args)) | |
| 839 { | |
| 840 /* This function can GC */ | |
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841 Lisp_Object val = Qnil; |
| 428 | 842 |
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843 LIST_LOOP_3 (arg, args, tail) |
| 428 | 844 { |
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845 if (!NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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846 { |
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847 if (NILP (XCDR (tail))) |
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848 { |
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849 /* Pass back multiple values if this is the last one: */ |
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850 return val; |
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851 } |
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852 |
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853 return IGNORE_MULTIPLE_VALUES (val); |
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854 } |
| 428 | 855 } |
| 856 | |
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857 return val; |
| 428 | 858 } |
| 859 | |
| 860 DEFUN ("and", Fand, 0, UNEVALLED, 0, /* | |
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861 Eval ARGS until one of them yields nil, then return nil. |
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862 The remaining ARGS are not evalled at all. |
| 428 | 863 If no arg yields nil, return the last arg's value. |
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864 |
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865 Any multiple values from the last form, and only from the last form, are |
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866 passed back. See `values' and `multiple-value-bind'. |
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867 |
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868 arguments: (&rest ARGS) |
| 428 | 869 */ |
| 870 (args)) | |
| 871 { | |
| 872 /* This function can GC */ | |
|
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873 Lisp_Object val = Qt; |
| 428 | 874 |
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|
875 LIST_LOOP_3 (arg, args, tail) |
| 428 | 876 { |
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877 if (NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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878 { |
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879 if (NILP (XCDR (tail))) |
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|
880 { |
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881 /* Pass back any multiple values for the last form: */ |
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882 return val; |
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883 } |
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|
884 |
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885 return Qnil; |
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886 } |
| 428 | 887 } |
| 888 | |
| 889 return val; | |
| 890 } | |
| 891 | |
| 892 DEFUN ("if", Fif, 2, UNEVALLED, 0, /* | |
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893 If COND yields non-nil, do THEN, else do ELSE. |
| 428 | 894 Returns the value of THEN or the value of the last of the ELSE's. |
| 895 THEN must be one expression, but ELSE... can be zero or more expressions. | |
| 896 If COND yields nil, and there are no ELSE's, the value is nil. | |
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897 |
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|
898 arguments: (COND THEN &rest ELSE) |
| 428 | 899 */ |
| 900 (args)) | |
| 901 { | |
| 902 /* This function can GC */ | |
| 903 Lisp_Object condition = XCAR (args); | |
| 904 Lisp_Object then_form = XCAR (XCDR (args)); | |
| 905 Lisp_Object else_forms = XCDR (XCDR (args)); | |
| 906 | |
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|
907 if (!NILP (IGNORE_MULTIPLE_VALUES (Feval (condition)))) |
| 428 | 908 return Feval (then_form); |
| 909 else | |
| 910 return Fprogn (else_forms); | |
| 911 } | |
| 912 | |
| 913 /* Macros `when' and `unless' are trivially defined in Lisp, | |
| 914 but it helps for bootstrapping to have them ALWAYS defined. */ | |
| 915 | |
| 916 DEFUN ("when", Fwhen, 1, MANY, 0, /* | |
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917 If COND yields non-nil, do BODY, else return nil. |
| 428 | 918 BODY can be zero or more expressions. If BODY is nil, return nil. |
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919 |
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920 arguments: (COND &rest BODY) |
| 428 | 921 */ |
| 922 (int nargs, Lisp_Object *args)) | |
| 923 { | |
| 924 Lisp_Object cond = args[0]; | |
| 925 Lisp_Object body; | |
| 853 | 926 |
| 428 | 927 switch (nargs) |
| 928 { | |
| 929 case 1: body = Qnil; break; | |
| 930 case 2: body = args[1]; break; | |
| 931 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break; | |
| 932 } | |
| 933 | |
| 934 return list3 (Qif, cond, body); | |
| 935 } | |
| 936 | |
| 937 DEFUN ("unless", Funless, 1, MANY, 0, /* | |
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938 If COND yields nil, do BODY, else return nil. |
| 428 | 939 BODY can be zero or more expressions. If BODY is nil, return nil. |
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940 |
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|
941 arguments: (COND &rest BODY) |
| 428 | 942 */ |
| 943 (int nargs, Lisp_Object *args)) | |
| 944 { | |
| 945 Lisp_Object cond = args[0]; | |
| 946 Lisp_Object body = Flist (nargs-1, args+1); | |
| 947 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body))); | |
| 948 } | |
| 949 | |
| 950 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /* | |
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951 Try each clause until one succeeds. |
| 428 | 952 Each clause looks like (CONDITION BODY...). CONDITION is evaluated |
| 953 and, if the value is non-nil, this clause succeeds: | |
| 954 then the expressions in BODY are evaluated and the last one's | |
| 955 value is the value of the cond-form. | |
| 956 If no clause succeeds, cond returns nil. | |
| 957 If a clause has one element, as in (CONDITION), | |
| 958 CONDITION's value if non-nil is returned from the cond-form. | |
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959 |
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960 arguments: (&rest CLAUSES) |
| 428 | 961 */ |
| 962 (args)) | |
| 963 { | |
| 964 /* This function can GC */ | |
| 442 | 965 REGISTER Lisp_Object val; |
| 428 | 966 |
| 967 LIST_LOOP_2 (clause, args) | |
| 968 { | |
| 969 CHECK_CONS (clause); | |
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970 if (!NILP (val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (clause))))) |
| 428 | 971 { |
| 972 if (!NILP (clause = XCDR (clause))) | |
| 973 { | |
| 974 CHECK_TRUE_LIST (clause); | |
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975 /* Pass back any multiple values here: */ |
| 428 | 976 val = Fprogn (clause); |
| 977 } | |
| 978 return val; | |
| 979 } | |
| 980 } | |
| 981 | |
| 982 return Qnil; | |
| 983 } | |
| 984 | |
| 985 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /* | |
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986 Eval BODY forms sequentially and return value of last one. |
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987 |
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988 arguments: (&rest BODY) |
| 428 | 989 */ |
| 990 (args)) | |
| 991 { | |
| 992 /* This function can GC */ | |
| 993 /* Caller must provide a true list in ARGS */ | |
| 442 | 994 REGISTER Lisp_Object val = Qnil; |
| 428 | 995 struct gcpro gcpro1; |
| 996 | |
| 997 GCPRO1 (args); | |
| 998 | |
| 999 { | |
| 1000 LIST_LOOP_2 (form, args) | |
| 1001 val = Feval (form); | |
| 1002 } | |
| 1003 | |
| 1004 UNGCPRO; | |
| 1005 return val; | |
| 1006 } | |
| 1007 | |
| 1008 /* Fprog1() is the canonical example of a function that must GCPRO a | |
| 1009 Lisp_Object across calls to Feval(). */ | |
| 1010 | |
| 1011 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /* | |
| 1012 Similar to `progn', but the value of the first form is returned. | |
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1013 |
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1014 All the arguments are evaluated sequentially. The value of FIRST is saved |
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1015 during evaluation of the remaining args, whose values are discarded. |
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1016 |
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1017 arguments: (FIRST &rest BODY) |
| 428 | 1018 */ |
| 1019 (args)) | |
| 1020 { | |
| 1849 | 1021 Lisp_Object val; |
| 428 | 1022 struct gcpro gcpro1; |
| 1023 | |
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1024 val = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
| 428 | 1025 |
| 1026 GCPRO1 (val); | |
| 1027 | |
| 1028 { | |
| 1029 LIST_LOOP_2 (form, XCDR (args)) | |
| 1030 Feval (form); | |
| 1031 } | |
| 1032 | |
| 1033 UNGCPRO; | |
| 1034 return val; | |
| 1035 } | |
| 1036 | |
| 1037 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /* | |
| 1038 Similar to `progn', but the value of the second form is returned. | |
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1039 |
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1040 All the arguments are evaluated sequentially. The value of SECOND is saved |
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1041 during evaluation of the remaining args, whose values are discarded. |
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1042 |
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1043 arguments: (FIRST SECOND &rest BODY) |
| 428 | 1044 */ |
| 1045 (args)) | |
| 1046 { | |
| 1047 /* This function can GC */ | |
| 1849 | 1048 Lisp_Object val; |
| 428 | 1049 struct gcpro gcpro1; |
| 1050 | |
| 1051 Feval (XCAR (args)); | |
| 1052 args = XCDR (args); | |
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1053 |
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1054 val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
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1055 |
| 428 | 1056 args = XCDR (args); |
| 1057 | |
| 1058 GCPRO1 (val); | |
| 1059 | |
| 442 | 1060 { |
| 1061 LIST_LOOP_2 (form, args) | |
| 1062 Feval (form); | |
| 1063 } | |
| 428 | 1064 |
| 1065 UNGCPRO; | |
| 1066 return val; | |
| 1067 } | |
| 1068 | |
| 1069 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /* | |
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1070 Bind variables according to VARLIST then eval BODY. |
| 428 | 1071 The value of the last form in BODY is returned. |
| 1072 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1073 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1074 Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
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|
1075 |
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|
1076 arguments: (VARLIST &rest BODY) |
| 428 | 1077 */ |
| 1078 (args)) | |
| 1079 { | |
| 1080 /* This function can GC */ | |
| 1081 Lisp_Object varlist = XCAR (args); | |
| 1082 Lisp_Object body = XCDR (args); | |
| 1083 int speccount = specpdl_depth(); | |
| 1084 | |
| 1085 EXTERNAL_LIST_LOOP_3 (var, varlist, tail) | |
| 1086 { | |
| 1087 Lisp_Object symbol, value, tem; | |
| 1088 if (SYMBOLP (var)) | |
| 1089 symbol = var, value = Qnil; | |
| 1090 else | |
| 1091 { | |
| 1092 CHECK_CONS (var); | |
| 1093 symbol = XCAR (var); | |
| 1094 tem = XCDR (var); | |
| 1095 if (NILP (tem)) | |
| 1096 value = Qnil; | |
| 1097 else | |
| 1098 { | |
| 1099 CHECK_CONS (tem); | |
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1100 value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 428 | 1101 if (!NILP (XCDR (tem))) |
| 563 | 1102 sferror |
| 428 | 1103 ("`let' bindings can have only one value-form", var); |
| 1104 } | |
| 1105 } | |
| 1106 specbind (symbol, value); | |
| 1107 } | |
| 771 | 1108 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1109 } |
| 1110 | |
| 1111 DEFUN ("let", Flet, 1, UNEVALLED, 0, /* | |
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1112 Bind variables according to VARLIST then eval BODY. |
| 428 | 1113 The value of the last form in BODY is returned. |
| 1114 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1115 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1116 All the VALUEFORMs are evalled before any symbols are bound. | |
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|
1117 |
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1118 arguments: (VARLIST &rest BODY) |
| 428 | 1119 */ |
| 1120 (args)) | |
| 1121 { | |
| 1122 /* This function can GC */ | |
| 1123 Lisp_Object varlist = XCAR (args); | |
| 1124 Lisp_Object body = XCDR (args); | |
| 1125 int speccount = specpdl_depth(); | |
| 1126 Lisp_Object *temps; | |
| 1127 int idx; | |
| 1128 struct gcpro gcpro1; | |
| 1129 | |
| 1130 /* Make space to hold the values to give the bound variables. */ | |
| 1131 { | |
| 1132 int varcount; | |
| 1133 GET_EXTERNAL_LIST_LENGTH (varlist, varcount); | |
| 1134 temps = alloca_array (Lisp_Object, varcount); | |
| 1135 } | |
| 1136 | |
| 1137 /* Compute the values and store them in `temps' */ | |
| 1138 GCPRO1 (*temps); | |
| 1139 gcpro1.nvars = 0; | |
| 1140 | |
| 1141 idx = 0; | |
| 442 | 1142 { |
| 1143 LIST_LOOP_2 (var, varlist) | |
| 1144 { | |
| 1145 Lisp_Object *value = &temps[idx++]; | |
| 1146 if (SYMBOLP (var)) | |
| 1147 *value = Qnil; | |
| 1148 else | |
| 1149 { | |
| 1150 Lisp_Object tem; | |
| 1151 CHECK_CONS (var); | |
| 1152 tem = XCDR (var); | |
| 1153 if (NILP (tem)) | |
| 1154 *value = Qnil; | |
| 1155 else | |
| 1156 { | |
| 1157 CHECK_CONS (tem); | |
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1158 *value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 442 | 1159 gcpro1.nvars = idx; |
| 1160 | |
| 1161 if (!NILP (XCDR (tem))) | |
| 563 | 1162 sferror |
| 442 | 1163 ("`let' bindings can have only one value-form", var); |
| 1164 } | |
| 1165 } | |
| 1166 } | |
| 1167 } | |
| 428 | 1168 |
| 1169 idx = 0; | |
| 442 | 1170 { |
| 1171 LIST_LOOP_2 (var, varlist) | |
| 1172 { | |
| 1173 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]); | |
| 1174 } | |
| 1175 } | |
| 428 | 1176 |
| 1177 UNGCPRO; | |
| 1178 | |
| 771 | 1179 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1180 } |
| 1181 | |
| 1182 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /* | |
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1183 If TEST yields non-nil, eval BODY... and repeat. |
| 428 | 1184 The order of execution is thus TEST, BODY, TEST, BODY and so on |
| 1185 until TEST returns nil. | |
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|
1186 |
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1187 arguments: (TEST &rest BODY) |
| 428 | 1188 */ |
| 1189 (args)) | |
| 1190 { | |
| 1191 /* This function can GC */ | |
| 1192 Lisp_Object test = XCAR (args); | |
| 1193 Lisp_Object body = XCDR (args); | |
| 1194 | |
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1195 while (!NILP (IGNORE_MULTIPLE_VALUES (Feval (test)))) |
| 428 | 1196 { |
| 1197 QUIT; | |
| 1198 Fprogn (body); | |
| 1199 } | |
| 1200 | |
| 1201 return Qnil; | |
| 1202 } | |
| 1203 | |
| 1204 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /* | |
| 1205 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL. | |
| 1206 The symbols SYM are variables; they are literal (not evaluated). | |
| 1207 The values VAL are expressions; they are evaluated. | |
| 1208 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
| 1209 The second VAL is not computed until after the first SYM is set, and so on; | |
| 1210 each VAL can use the new value of variables set earlier in the `setq'. | |
| 1211 The return value of the `setq' form is the value of the last VAL. | |
| 1212 */ | |
| 1213 (args)) | |
| 1214 { | |
| 1215 /* This function can GC */ | |
| 1216 int nargs; | |
| 2421 | 1217 Lisp_Object retval = Qnil; |
| 428 | 1218 |
| 1219 GET_LIST_LENGTH (args, nargs); | |
| 1220 | |
| 1221 if (nargs & 1) /* Odd number of arguments? */ | |
| 1222 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs))); | |
| 1223 | |
| 2421 | 1224 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args) |
| 428 | 1225 { |
| 1226 val = Feval (val); | |
|
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Support full Common Lisp multiple values in C.
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4657
diff
changeset
|
1227 val = IGNORE_MULTIPLE_VALUES (val); |
| 428 | 1228 Fset (symbol, val); |
| 2421 | 1229 retval = val; |
| 428 | 1230 } |
| 1231 | |
| 2421 | 1232 END_GC_PROPERTY_LIST_LOOP (symbol); |
| 1233 | |
| 1234 return retval; | |
| 428 | 1235 } |
| 1236 | |
| 1237 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /* | |
| 1238 Return the argument, without evaluating it. `(quote x)' yields `x'. | |
| 3794 | 1239 |
| 3842 | 1240 `quote' differs from `function' in that it is a hint that an expression is |
| 1241 data, not a function. In particular, under some circumstances the byte | |
| 1242 compiler will compile an expression quoted with `function', but it will | |
| 1243 never do so for an expression quoted with `quote'. These issues are most | |
| 1244 important for lambda expressions (see `lambda'). | |
| 1245 | |
| 1246 There is an alternative, more readable, reader syntax for `quote': a Lisp | |
| 1247 object preceded by `''. Thus, `'x' is equivalent to `(quote x)', in all | |
| 1248 contexts. A print function may use either. Internally the expression is | |
| 1249 represented as `(quote x)'). | |
| 428 | 1250 */ |
| 1251 (args)) | |
| 1252 { | |
| 1253 return XCAR (args); | |
| 1254 } | |
| 1255 | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1256 /* 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
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|
1257 variety version, so why not make it a subr? */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1258 DEFUN ("quote-maybe", Fquote_maybe, 1, 1, 0, /* |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1259 Quote EXPR if it is not self quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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4693
diff
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|
1260 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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4693
diff
changeset
|
1261 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>
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4693
diff
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|
1262 argument is evaluated before `quote-maybe' is called. It returns either |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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4693
diff
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|
1263 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>
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diff
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|
1264 self-quoting. Lists starting with the symbol `lambda' are regarded as |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1265 self-quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1266 */ |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1267 (expr)) |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1268 { |
|
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|
1269 if ((XTYPE (expr)) == Lisp_Type_Record) |
|
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|
1270 { |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1271 switch (XRECORD_LHEADER (expr)->type) |
|
17f7e9191c0b
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|
1272 { |
|
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|
1273 case lrecord_type_symbol: |
|
17f7e9191c0b
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diff
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|
1274 if (NILP (expr) || (EQ (expr, Qt)) || SYMBOL_IS_KEYWORD (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1275 { |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1276 return expr; |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1277 } |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1278 break; |
|
17f7e9191c0b
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|
1279 case lrecord_type_cons: |
|
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|
1280 if (EQ (XCAR (expr), Qlambda)) |
|
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|
1281 { |
|
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1282 return expr; |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1283 } |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1284 break; |
|
17f7e9191c0b
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diff
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|
1285 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1286 case lrecord_type_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1287 case lrecord_type_string: |
|
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|
1288 case lrecord_type_compiled_function: |
|
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1289 case lrecord_type_bit_vector: |
|
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|
1290 case lrecord_type_float: |
|
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|
1291 case lrecord_type_hash_table: |
|
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1292 case lrecord_type_char_table: |
|
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1293 case lrecord_type_range_table: |
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1294 case lrecord_type_bignum: |
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1295 case lrecord_type_ratio: |
|
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1296 case lrecord_type_bigfloat: |
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1297 return expr; |
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|
1298 } |
|
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|
1299 return list2 (Qquote, expr); |
|
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|
1300 } |
|
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|
1301 |
|
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|
1302 /* Fixnums and characters are self-quoting: */ |
|
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|
1303 return expr; |
|
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|
1304 } |
|
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|
1305 |
| 428 | 1306 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /* |
| 3842 | 1307 Return the argument, without evaluating it. `(function x)' yields `x'. |
| 1308 | |
| 1309 `function' differs from `quote' in that it is a hint that an expression is | |
| 1310 a function, not data. In particular, under some circumstances the byte | |
| 1311 compiler will compile an expression quoted with `function', but it will | |
| 1312 never do so for an expression quoted with `quote'. However, the byte | |
| 1313 compiler will not compile an expression buried in a data structure such as | |
| 1314 a vector or a list which is not syntactically a function. These issues are | |
| 1315 most important for lambda expressions (see `lambda'). | |
| 1316 | |
| 1317 There is an alternative, more readable, reader syntax for `function': a Lisp | |
| 1318 object preceded by `#''. Thus, #'x is equivalent to (function x), in all | |
| 1319 contexts. A print function may use either. Internally the expression is | |
| 1320 represented as `(function x)'). | |
| 428 | 1321 */ |
| 1322 (args)) | |
| 1323 { | |
| 1324 return XCAR (args); | |
| 1325 } | |
| 1326 | |
| 1327 | |
| 1328 /************************************************************************/ | |
| 1329 /* Defining functions/variables */ | |
| 1330 /************************************************************************/ | |
| 1331 static Lisp_Object | |
| 1332 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1333 { | |
| 1334 Ffset (name, defn); | |
|
4535
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|
1335 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1336 return name; |
| 1337 } | |
| 1338 | |
| 1339 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
|
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|
1340 Define NAME as a function. |
| 428 | 1341 The definition is (lambda ARGLIST [DOCSTRING] BODY...). |
| 1342 See also the function `interactive'. | |
|
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|
1343 |
|
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|
1344 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1345 */ |
| 1346 (args)) | |
| 1347 { | |
| 1348 /* This function can GC */ | |
| 1349 return define_function (XCAR (args), | |
| 1350 Fcons (Qlambda, XCDR (args))); | |
| 1351 } | |
| 1352 | |
| 1353 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
|
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1354 Define NAME as a macro. |
| 428 | 1355 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). |
| 1356 When the macro is called, as in (NAME ARGS...), | |
| 1357 the function (lambda ARGLIST BODY...) is applied to | |
| 1358 the list ARGS... as it appears in the expression, | |
| 1359 and the result should be a form to be evaluated instead of the original. | |
|
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1360 |
|
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|
1361 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1362 */ |
| 1363 (args)) | |
| 1364 { | |
| 1365 /* This function can GC */ | |
| 1366 return define_function (XCAR (args), | |
| 1367 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1368 } | |
| 1369 | |
| 1370 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
|
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1371 Define SYMBOL as a variable. |
| 428 | 1372 You are not required to define a variable in order to use it, |
| 1373 but the definition can supply documentation and an initial value | |
| 1374 in a way that tags can recognize. | |
| 1375 | |
| 1376 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1377 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1378 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1379 void.) | |
| 1380 If SYMBOL is buffer-local, its default value is what is set; | |
| 1381 buffer-local values are not affected. | |
| 1382 INITVALUE and DOCSTRING are optional. | |
| 1383 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1384 This means that M-x set-variable recognizes it. |
| 428 | 1385 If INITVALUE is missing, SYMBOL's value is not set. |
| 1386 | |
| 1387 In lisp-interaction-mode defvar is treated as defconst. | |
|
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1388 |
|
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1389 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1390 */ |
| 1391 (args)) | |
| 1392 { | |
| 1393 /* This function can GC */ | |
| 1394 Lisp_Object sym = XCAR (args); | |
| 1395 | |
| 1396 if (!NILP (args = XCDR (args))) | |
| 1397 { | |
| 1398 Lisp_Object val = XCAR (args); | |
| 1399 | |
| 1400 if (NILP (Fdefault_boundp (sym))) | |
| 1401 { | |
| 1402 struct gcpro gcpro1; | |
| 1403 GCPRO1 (val); | |
|
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1404 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1405 Fset_default (sym, val); |
| 1406 UNGCPRO; | |
| 1407 } | |
| 1408 | |
| 1409 if (!NILP (args = XCDR (args))) | |
| 1410 { | |
| 1411 Lisp_Object doc = XCAR (args); | |
| 1412 Fput (sym, Qvariable_documentation, doc); | |
| 1413 if (!NILP (args = XCDR (args))) | |
| 563 | 1414 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1415 } |
| 1416 } | |
| 1417 | |
| 1418 #ifdef I18N3 | |
| 1419 if (!NILP (Vfile_domain)) | |
| 1420 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1421 #endif | |
| 1422 | |
| 1423 LOADHIST_ATTACH (sym); | |
| 1424 return sym; | |
| 1425 } | |
| 1426 | |
| 1427 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
|
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1428 Define SYMBOL as a constant variable. |
| 428 | 1429 The intent is that programs do not change this value, but users may. |
| 1430 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1431 If SYMBOL is buffer-local, its default value is what is set; | |
| 1432 buffer-local values are not affected. | |
| 1433 DOCSTRING is optional. | |
| 1434 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1435 This means that M-x set-variable recognizes it. |
| 428 | 1436 |
| 1437 Note: do not use `defconst' for user options in libraries that are not | |
| 1438 normally loaded, since it is useful for users to be able to specify | |
| 1439 their own values for such variables before loading the library. | |
| 1440 Since `defconst' unconditionally assigns the variable, | |
| 1441 it would override the user's choice. | |
|
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1442 |
|
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|
1443 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1444 */ |
| 1445 (args)) | |
| 1446 { | |
| 1447 /* This function can GC */ | |
| 1448 Lisp_Object sym = XCAR (args); | |
| 1449 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1450 struct gcpro gcpro1; | |
| 1451 | |
| 1452 GCPRO1 (val); | |
| 1453 | |
|
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1454 val = IGNORE_MULTIPLE_VALUES (val); |
|
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1455 |
| 428 | 1456 Fset_default (sym, val); |
| 1457 | |
| 1458 UNGCPRO; | |
| 1459 | |
| 1460 if (!NILP (args = XCDR (args))) | |
| 1461 { | |
| 1462 Lisp_Object doc = XCAR (args); | |
| 1463 Fput (sym, Qvariable_documentation, doc); | |
| 1464 if (!NILP (args = XCDR (args))) | |
| 563 | 1465 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1466 } |
| 1467 | |
| 1468 #ifdef I18N3 | |
| 1469 if (!NILP (Vfile_domain)) | |
| 1470 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1471 #endif | |
| 1472 | |
| 1473 LOADHIST_ATTACH (sym); | |
| 1474 return sym; | |
| 1475 } | |
| 1476 | |
|
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1477 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
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1478 with the symbol variable aliases. */ |
| 428 | 1479 |
| 1480 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1481 Return result of expanding macros at top level of FORM. | |
| 1482 If FORM is not a macro call, it is returned unchanged. | |
| 1483 Otherwise, the macro is expanded and the expansion is considered | |
| 1484 in place of FORM. When a non-macro-call results, it is returned. | |
| 1485 | |
| 442 | 1486 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1487 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1488 */ | |
| 442 | 1489 (form, environment)) |
| 428 | 1490 { |
| 1491 /* This function can GC */ | |
| 1492 /* With cleanups from Hallvard Furuseth. */ | |
| 1493 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1494 | |
| 1495 while (1) | |
| 1496 { | |
| 1497 /* Come back here each time we expand a macro call, | |
| 1498 in case it expands into another macro call. */ | |
| 1499 if (!CONSP (form)) | |
| 1500 break; | |
| 1501 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1502 def = sym = XCAR (form); | |
| 1503 tem = Qnil; | |
| 1504 /* Trace symbols aliases to other symbols | |
| 1505 until we get a symbol that is not an alias. */ | |
| 1506 while (SYMBOLP (def)) | |
| 1507 { | |
| 1508 QUIT; | |
| 1509 sym = def; | |
| 442 | 1510 tem = Fassq (sym, environment); |
| 428 | 1511 if (NILP (tem)) |
| 1512 { | |
| 1513 def = XSYMBOL (sym)->function; | |
| 1514 if (!UNBOUNDP (def)) | |
| 1515 continue; | |
| 1516 } | |
| 1517 break; | |
| 1518 } | |
| 442 | 1519 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1520 and if TEM is nil then DEF is SYM's function definition. */ |
| 1521 if (NILP (tem)) | |
| 1522 { | |
| 442 | 1523 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1524 Look at its function definition. */ |
| 1525 if (UNBOUNDP (def) | |
| 1526 || !CONSP (def)) | |
| 1527 /* Not defined or definition not suitable */ | |
| 1528 break; | |
| 1529 if (EQ (XCAR (def), Qautoload)) | |
| 1530 { | |
| 1531 /* Autoloading function: will it be a macro when loaded? */ | |
| 1532 tem = Felt (def, make_int (4)); | |
| 1533 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1534 { | |
| 1535 /* Yes, load it and try again. */ | |
| 970 | 1536 /* do_autoload GCPROs both arguments */ |
| 428 | 1537 do_autoload (def, sym); |
| 1538 continue; | |
| 1539 } | |
| 1540 else | |
| 1541 break; | |
| 1542 } | |
| 1543 else if (!EQ (XCAR (def), Qmacro)) | |
| 1544 break; | |
| 1545 else expander = XCDR (def); | |
| 1546 } | |
| 1547 else | |
| 1548 { | |
| 1549 expander = XCDR (tem); | |
| 1550 if (NILP (expander)) | |
| 1551 break; | |
| 1552 } | |
| 1553 form = apply1 (expander, XCDR (form)); | |
| 1554 } | |
| 1555 return form; | |
| 1556 } | |
| 1557 | |
| 1558 | |
| 1559 /************************************************************************/ | |
| 1560 /* Non-local exits */ | |
| 1561 /************************************************************************/ | |
| 1562 | |
| 1318 | 1563 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1564 | |
| 1565 int | |
| 1566 proper_redisplay_wrapping_in_place (void) | |
| 1567 { | |
| 1568 return !in_display | |
| 1569 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1570 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1571 } | |
| 1572 | |
| 1573 static void | |
| 1574 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1575 { | |
| 1576 assert_with_message | |
| 1577 (proper_redisplay_wrapping_in_place (), | |
| 1578 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1579 } | |
| 1580 | |
| 1581 static void | |
| 1582 check_proper_critical_section_lisp_protection (void) | |
| 1583 { | |
| 1584 assert_with_message | |
| 1585 (proper_redisplay_wrapping_in_place (), | |
| 1586 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1587 } | |
| 1588 | |
| 1589 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1590 | |
| 428 | 1591 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
|
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1592 Eval BODY allowing nonlocal exits using `throw'. |
| 428 | 1593 TAG is evalled to get the tag to use. Then the BODY is executed. |
| 3577 | 1594 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1595 If no throw happens, `catch' returns the value of the last BODY form. |
| 1596 If a throw happens, it specifies the value to return from `catch'. | |
|
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1597 |
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|
1598 arguments: (TAG &rest BODY) |
| 428 | 1599 */ |
| 1600 (args)) | |
| 1601 { | |
| 1602 /* This function can GC */ | |
| 1603 Lisp_Object tag = Feval (XCAR (args)); | |
| 1604 Lisp_Object body = XCDR (args); | |
| 2532 | 1605 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1606 } |
| 1607 | |
| 1608 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1609 FUNC should return a Lisp_Object. | |
| 1610 This is how catches are done from within C code. */ | |
| 1611 | |
| 1612 Lisp_Object | |
| 1613 internal_catch (Lisp_Object tag, | |
| 1614 Lisp_Object (*func) (Lisp_Object arg), | |
| 1615 Lisp_Object arg, | |
| 853 | 1616 int * volatile threw, |
| 2532 | 1617 Lisp_Object * volatile thrown_tag, |
| 1618 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1619 { |
| 1620 /* This structure is made part of the chain `catchlist'. */ | |
| 1621 struct catchtag c; | |
| 1622 | |
| 1623 /* Fill in the components of c, and put it on the list. */ | |
| 1624 c.next = catchlist; | |
| 1625 c.tag = tag; | |
| 853 | 1626 c.actual_tag = Qnil; |
| 2532 | 1627 c.backtrace = Qnil; |
| 428 | 1628 c.val = Qnil; |
| 1629 c.backlist = backtrace_list; | |
| 1630 #if 0 /* FSFmacs */ | |
| 1631 /* #### */ | |
| 1632 c.handlerlist = handlerlist; | |
| 1633 #endif | |
| 1634 c.lisp_eval_depth = lisp_eval_depth; | |
| 1635 c.pdlcount = specpdl_depth(); | |
| 1636 #if 0 /* FSFmacs */ | |
| 1637 c.poll_suppress_count = async_timer_suppress_count; | |
| 1638 #endif | |
| 1639 c.gcpro = gcprolist; | |
| 1640 catchlist = &c; | |
| 1641 | |
| 1642 /* Call FUNC. */ | |
| 1643 if (SETJMP (c.jmp)) | |
| 1644 { | |
| 1645 /* Throw works by a longjmp that comes right here. */ | |
| 1646 if (threw) *threw = 1; | |
| 853 | 1647 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1648 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1649 return c.val; |
| 1650 } | |
| 1651 c.val = (*func) (arg); | |
| 1652 if (threw) *threw = 0; | |
| 853 | 1653 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1654 catchlist = c.next; |
| 853 | 1655 check_catchlist_sanity (); |
| 428 | 1656 return c.val; |
| 1657 } | |
| 1658 | |
| 1659 | |
| 1660 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1661 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1662 | |
| 2297 | 1663 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1664 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1665 condition-case form has a TAG of Qnil. |
| 1666 | |
| 1667 Before each catch is discarded, unbind all special bindings and | |
| 1668 execute all unwind-protect clauses made above that catch. Unwind | |
| 1669 the handler stack as we go, so that the proper handlers are in | |
| 1670 effect for each unwind-protect clause we run. At the end, restore | |
| 1671 some static info saved in CATCH, and longjmp to the location | |
| 1672 specified in the | |
| 1673 | |
| 1674 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1675 | |
| 2268 | 1676 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1677 Lisp_Object)); | |
| 1678 | |
| 1679 static DOESNT_RETURN | |
| 853 | 1680 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1681 { |
| 1682 REGISTER int last_time; | |
| 1683 | |
| 1684 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1685 Before each catch is discarded, unbind all special bindings | |
| 1686 and execute all unwind-protect clauses made above that catch. | |
| 1687 At the end, restore some static info saved in CATCH, | |
| 1688 and longjmp to the location specified. | |
| 1689 */ | |
| 1690 | |
| 1691 /* Save the value somewhere it will be GC'ed. | |
| 1692 (Can't overwrite tag slot because an unwind-protect may | |
| 1693 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1694 c->val = val; | |
| 853 | 1695 c->actual_tag = tag; |
| 428 | 1696 |
| 1697 #if 0 /* FSFmacs */ | |
| 1698 /* Restore the polling-suppression count. */ | |
| 1699 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1700 #endif | |
| 1701 | |
| 617 | 1702 #if 1 |
| 428 | 1703 do |
| 1704 { | |
| 1705 last_time = catchlist == c; | |
| 1706 | |
| 1707 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1708 handlers. */ | |
| 771 | 1709 unbind_to (catchlist->pdlcount); |
| 428 | 1710 catchlist = catchlist->next; |
| 853 | 1711 check_catchlist_sanity (); |
| 428 | 1712 } |
| 1713 while (! last_time); | |
| 617 | 1714 #else |
| 1715 /* Former XEmacs code. This is definitely not as correct because | |
| 1716 there may be a number of catches we're unwinding, and a number | |
| 1717 of unwind-protects in the process. By not undoing the catches till | |
| 1718 the end, there may be invalid catches still current. (This would | |
| 1719 be a particular problem with code like this: | |
| 1720 | |
| 1721 (catch 'foo | |
| 1722 (call-some-code-which-does... | |
| 1723 (catch 'bar | |
| 1724 (unwind-protect | |
| 1725 (call-some-code-which-does... | |
| 1726 (catch 'bar | |
| 1727 (call-some-code-which-does... | |
| 1728 (throw 'foo nil)))) | |
| 1729 (throw 'bar nil))))) | |
| 1730 | |
| 1731 This would try to throw to the inner (catch 'bar)! | |
| 1732 | |
| 1733 --ben | |
| 1734 */ | |
| 428 | 1735 /* Unwind the specpdl stack */ |
| 771 | 1736 unbind_to (c->pdlcount); |
| 428 | 1737 catchlist = c->next; |
| 853 | 1738 check_catchlist_sanity (); |
| 617 | 1739 #endif /* Former code */ |
| 428 | 1740 |
| 1204 | 1741 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1742 if (profiling_active) |
| 1743 { | |
| 1744 while (backtrace_list != c->backlist) | |
| 1745 { | |
| 1746 profile_record_unwind (backtrace_list); | |
| 1747 backtrace_list = backtrace_list->next; | |
| 1748 } | |
| 1749 } | |
| 1750 else | |
| 1751 backtrace_list = c->backlist; | |
| 428 | 1752 lisp_eval_depth = c->lisp_eval_depth; |
| 1753 | |
| 442 | 1754 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1755 throw_level = 0; |
| 1756 #endif | |
| 1757 LONGJMP (c->jmp, 1); | |
| 1758 } | |
| 1759 | |
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1760 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
|
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|
1761 Lisp_Object, Lisp_Object)); |
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1762 |
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1763 DOESNT_RETURN |
| 428 | 1764 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
| 1765 Lisp_Object sig, Lisp_Object data) | |
| 1766 { | |
| 442 | 1767 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1768 /* die if we recurse more than is reasonable */ |
| 1769 if (++throw_level > 20) | |
| 2500 | 1770 ABORT (); |
| 428 | 1771 #endif |
| 1772 | |
| 1318 | 1773 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 1774 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 1775 #endif |
| 1123 | 1776 |
| 428 | 1777 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1778 "last resort" when there is no handler for this error and | |
| 1779 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1780 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1781 initialization stages) we would get in an infinite recursive |
| 1782 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1783 really-early-error-handler. | |
| 1784 | |
| 1785 Note that in fact the only time that the "last resort" | |
| 3025 | 1786 occurs is when there's no catch for `top-level' -- the |
| 1787 `top-level' catch and the catch-all error handler are | |
| 428 | 1788 established at the same time, in initial_command_loop/ |
| 1789 top_level_1. | |
| 1790 | |
| 853 | 1791 [[#### Fix this horrifitude!]] |
| 1792 | |
| 1793 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1794 */ |
| 1795 | |
| 1796 while (1) | |
| 1797 { | |
| 1798 REGISTER struct catchtag *c; | |
| 1799 | |
| 1800 #if 0 /* FSFmacs */ | |
| 1801 if (!NILP (tag)) /* #### */ | |
| 1802 #endif | |
| 1803 for (c = catchlist; c; c = c->next) | |
| 1804 { | |
| 2532 | 1805 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1806 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1807 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1808 unwind_to_catch (c, val, tag); | |
| 428 | 1809 } |
| 1810 if (!bomb_out_p) | |
| 1811 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1812 else | |
| 1813 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1814 } | |
| 1815 } | |
| 1816 | |
| 1817 /* See above, where CATCHLIST is defined, for a description of how | |
| 1818 Fthrow() works. | |
| 1819 | |
| 1820 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1821 back to the appropriate condition-case handler after (maybe) | |
| 1822 the debugger is entered. In that case, TAG is the value | |
| 1823 of Vcondition_handlers that was in place just after the | |
| 1824 condition-case handler was set up. The car of this will be | |
| 1825 some data referring to the handler: Its car will be Qunbound | |
| 1826 (thus, this tag can never be generated by Lisp code), and | |
| 1827 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1828 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1829 This works fine because Fthrow() does not care what TAG was | |
| 1830 passed to it: it just looks up the catch list for something | |
| 1831 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1832 back to the place that established the catch (in this case, | |
| 1833 condition_case_1). See below for more info. | |
| 1834 */ | |
| 1835 | |
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1836 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1837 Throw to the catch for TAG and return VALUE from it. |
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1838 |
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1839 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1840 back. Tags are the same if and only if they are `eq'. |
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1841 |
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1842 arguments: (TAG VALUE) |
| 428 | 1843 */ |
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1844 (args)) |
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1845 { |
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1846 int nargs; |
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1847 Lisp_Object tag, value; |
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1848 |
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1849 GET_LIST_LENGTH (args, nargs); |
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1850 if (nargs != 2) |
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1851 { |
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1852 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1853 } |
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1854 |
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1855 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1856 |
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1857 value = Feval (XCAR (XCDR (args))); |
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1858 |
| 444 | 1859 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1860 RETURN_NOT_REACHED (Qnil); |
| 428 | 1861 } |
| 1862 | |
| 1863 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1864 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1865 If BODYFORM completes normally, its value is returned | |
| 1866 after executing the UNWINDFORMS. | |
| 1867 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
|
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1868 |
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parents:
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changeset
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1869 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1870 */ |
| 1871 (args)) | |
| 1872 { | |
| 1873 /* This function can GC */ | |
| 1874 int speccount = specpdl_depth(); | |
| 1875 | |
| 1876 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1877 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1878 } |
| 1879 | |
| 1880 | |
| 1881 /************************************************************************/ | |
| 1292 | 1882 /* Trapping errors */ |
| 428 | 1883 /************************************************************************/ |
| 1884 | |
| 1885 static Lisp_Object | |
| 1886 condition_bind_unwind (Lisp_Object loser) | |
| 1887 { | |
| 617 | 1888 /* There is no problem freeing stuff here like there is in |
| 1889 condition_case_unwind(), because there are no outside pointers | |
| 1890 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1891 |
| 428 | 1892 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1893 Lisp_Object tem = XCAR (loser); | |
| 853 | 1894 int first = 1; |
| 428 | 1895 |
| 1896 while (CONSP (tem)) | |
| 1897 { | |
| 853 | 1898 Lisp_Object victim = tem; |
| 1899 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1900 free_opaque_ptr (XCAR (victim)); | |
| 1901 first = 0; | |
| 1902 tem = XCDR (victim); | |
| 428 | 1903 free_cons (victim); |
| 1904 } | |
| 1905 | |
| 1906 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1907 Vcondition_handlers = XCDR (loser); |
| 1908 | |
| 1909 free_cons (loser); | |
| 428 | 1910 return Qnil; |
| 1911 } | |
| 1912 | |
| 1913 static Lisp_Object | |
| 1914 condition_case_unwind (Lisp_Object loser) | |
| 1915 { | |
| 1916 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1917 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1918 catch. With the recent changes to unwind_to_catch(), the | |
| 1919 evil situation might not happen any more; it certainly could | |
| 1920 happen before because it did. But it's very precarious to rely | |
| 1921 on something like this. #### Instead we should rewrite, adopting | |
| 1922 the FSF's mechanism with a struct handler instead of | |
| 1923 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1924 to hold all of the values, and there's no possibility either of | |
| 1925 crashes from freeing objects too quickly, or objects not getting | |
| 1926 freed and hanging around till the next GC. | |
| 1927 | |
| 1928 In practice, the extra consing here should not matter because | |
| 1929 it only happens when we throw past the condition-case, which almost | |
| 1930 always is the result of an error. Most of the time, there will be | |
| 1931 no error, and we will free the objects below in the main function. | |
| 1932 | |
| 1933 --ben | |
| 1934 | |
| 1935 DO NOT DO: free_cons (XCAR (loser)); | |
| 1936 */ | |
| 1937 | |
| 428 | 1938 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1939 Vcondition_handlers = XCDR (loser); |
| 1940 | |
| 1941 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1942 return Qnil; |
| 1943 } | |
| 1944 | |
| 1945 /* Split out from condition_case_3 so that primitive C callers | |
| 1946 don't have to cons up a lisp handler form to be evaluated. */ | |
| 1947 | |
| 1948 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 1949 specified by HANDLERS. If no error occurs that is indicated by | |
| 1950 HANDLERS as something to be caught, the return value of this | |
| 1951 function is the return value from BFUN. If such an error does | |
| 1952 occur, HFUN is called, and its return value becomes the | |
| 1953 return value of condition_case_1(). The second argument passed | |
| 1954 to HFUN will always be HARG. The first argument depends on | |
| 1955 HANDLERS: | |
| 1956 | |
| 1957 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 1958 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 1959 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 1960 arguments passed to `signal'. The debugger is not invoked even if | |
| 1961 `debug-on-error' was set. | |
| 1962 | |
| 1963 A HANDLERS value of Qerror is the same as Qt except that the | |
| 1964 debugger is invoked if `debug-on-error' was set. | |
| 1965 | |
| 1966 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 1967 exactly as in `condition-case', and errors will be trapped | |
| 1968 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 1969 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 1970 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 1971 | |
| 1972 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 1973 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 1974 for why), establishes a catch whose tag is this new value of | |
| 1975 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 1976 it calls Fthrow(), setting TAG to this same new value of | |
| 1977 Vcondition_handlers and setting VAL to the same thing that will | |
| 1978 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 1979 jump point we just established, and we in turn just call the | |
| 1980 HFUN and return its value. | |
| 1981 | |
| 1982 For a real condition-case, HFUN will always be | |
| 1983 run_condition_case_handlers() and HARG is the argument VAR | |
| 1984 to condition-case. That function just binds VAR to the cons | |
| 1985 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 1986 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 1987 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 1988 it had *before* condition_case_1() was called. This maintains | |
| 1989 consistency (so that the state of things at exit of | |
| 1990 condition_case_1() is the same as at entry), and implies | |
| 1991 that the handler can signal the same error again (possibly | |
| 1992 after processing of its own), without getting in an infinite | |
| 1993 loop. */ | |
| 1994 | |
| 1995 Lisp_Object | |
| 1996 condition_case_1 (Lisp_Object handlers, | |
| 1997 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 1998 Lisp_Object barg, | |
| 1999 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2000 Lisp_Object harg) | |
| 2001 { | |
| 2002 int speccount = specpdl_depth(); | |
| 2003 struct catchtag c; | |
| 617 | 2004 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2005 |
| 2006 #if 0 /* FSFmacs */ | |
| 2007 c.tag = Qnil; | |
| 2008 #else | |
| 2009 /* Do consing now so out-of-memory error happens up front */ | |
| 2010 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2011 which is known specially by Fsignal. | |
| 617 | 2012 [[ This is an abomination, but to fix it would require either |
| 428 | 2013 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2014 or changing the byte-compiler output (no thanks).]] |
| 2015 | |
| 2016 The above comment is clearly wrong. FSF does not do it this way | |
| 2017 and did not change the byte-compiler output. Instead they use a | |
| 2018 `struct handler' to hold the various values (in place of our | |
| 2019 Vcondition_handlers) and chain them together, with pointers from | |
| 2020 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2021 consider moving to something similar, but not before I merge my | |
| 2022 stderr-proc workspace, which contains changes to these | |
| 2023 functions. --ben */ | |
| 428 | 2024 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2025 Vcondition_handlers); | |
| 2026 #endif | |
| 2027 c.val = Qnil; | |
| 853 | 2028 c.actual_tag = Qnil; |
| 2532 | 2029 c.backtrace = Qnil; |
| 428 | 2030 c.backlist = backtrace_list; |
| 2031 #if 0 /* FSFmacs */ | |
| 2032 /* #### */ | |
| 2033 c.handlerlist = handlerlist; | |
| 2034 #endif | |
| 2035 c.lisp_eval_depth = lisp_eval_depth; | |
| 2036 c.pdlcount = specpdl_depth(); | |
| 2037 #if 0 /* FSFmacs */ | |
| 2038 c.poll_suppress_count = async_timer_suppress_count; | |
| 2039 #endif | |
| 2040 c.gcpro = gcprolist; | |
| 2041 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2042 c.next = catchlist; | |
| 2043 | |
| 2044 if (SETJMP (c.jmp)) | |
| 2045 { | |
| 2046 /* throw does ungcpro, etc */ | |
| 2047 return (*hfun) (c.val, harg); | |
| 2048 } | |
| 2049 | |
| 2050 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2051 | |
| 2052 catchlist = &c; | |
| 2053 #if 0 /* FSFmacs */ | |
| 2054 h.handler = handlers; | |
| 2055 h.var = Qnil; | |
| 2056 h.next = handlerlist; | |
| 2057 h.tag = &c; | |
| 2058 handlerlist = &h; | |
| 2059 #else | |
| 2060 Vcondition_handlers = c.tag; | |
| 2061 #endif | |
| 2062 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2063 c.val = ((*bfun) (barg)); | |
| 2064 UNGCPRO; | |
| 617 | 2065 |
| 2066 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2067 GCPRO3 (harg, c.val, c.tag); | |
| 2068 | |
| 428 | 2069 catchlist = c.next; |
| 853 | 2070 check_catchlist_sanity (); |
| 617 | 2071 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2072 delete this here. */ | |
| 428 | 2073 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2074 unbind_to (speccount); |
| 617 | 2075 |
| 2076 UNGCPRO; | |
| 2077 /* free the conses *after* the unbind, because the unbind will run | |
| 2078 condition_case_unwind above. */ | |
| 853 | 2079 free_cons (XCAR (c.tag)); |
| 2080 free_cons (c.tag); | |
| 617 | 2081 return c.val; |
| 428 | 2082 } |
| 2083 | |
| 2084 static Lisp_Object | |
| 2085 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2086 { | |
| 2087 /* This function can GC */ | |
| 2088 #if 0 /* FSFmacs */ | |
| 2089 if (!NILP (h.var)) | |
| 2090 specbind (h.var, c.val); | |
| 2091 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2092 | |
| 2093 /* Note that this just undoes the binding of h.var; whoever | |
| 2094 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2095 throwing. */ | |
| 771 | 2096 unbind_to (c.pdlcount); |
| 428 | 2097 return val; |
| 2098 #else | |
| 2099 int speccount; | |
| 2100 | |
| 2101 CHECK_TRUE_LIST (val); | |
| 2102 if (NILP (var)) | |
| 2103 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2104 | |
| 2105 speccount = specpdl_depth(); | |
| 2106 specbind (var, Fcar (val)); | |
| 2107 val = Fprogn (Fcdr (val)); | |
| 771 | 2108 return unbind_to_1 (speccount, val); |
| 428 | 2109 #endif |
| 2110 } | |
| 2111 | |
| 2112 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2113 condition-case except that it takes three arguments rather | |
| 2114 than a single list of arguments. */ | |
| 2115 Lisp_Object | |
| 2116 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2117 { | |
| 2118 /* This function can GC */ | |
| 2119 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2120 { | |
| 2121 if (NILP (handler)) | |
| 2122 ; | |
| 2123 else if (CONSP (handler)) | |
| 2124 { | |
| 2125 Lisp_Object conditions = XCAR (handler); | |
| 2126 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2127 if (SYMBOLP (conditions)) | |
| 2128 ; | |
| 2129 else | |
| 2130 { | |
| 2131 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2132 if (!SYMBOLP (condition)) | |
| 2133 goto invalid_condition_handler; | |
| 2134 } | |
| 2135 } | |
| 2136 else | |
| 2137 { | |
| 2138 invalid_condition_handler: | |
| 563 | 2139 sferror ("Invalid condition handler", handler); |
| 428 | 2140 } |
| 2141 } | |
| 2142 | |
| 2143 CHECK_SYMBOL (var); | |
| 2144 | |
| 2145 return condition_case_1 (handlers, | |
| 2146 Feval, bodyform, | |
| 2147 run_condition_case_handlers, | |
| 2148 var); | |
| 2149 } | |
| 2150 | |
| 2151 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2152 Regain control when an error is signalled. | |
| 2153 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2154 Executes BODYFORM and returns its value if no error happens. | |
| 2155 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2156 where the BODY is made of Lisp expressions. | |
| 2157 | |
| 771 | 2158 A typical usage of `condition-case' looks like this: |
| 2159 | |
| 2160 (condition-case nil | |
| 2161 ;; you need a progn here if you want more than one statement ... | |
| 2162 (progn | |
| 2163 (do-something) | |
| 2164 (do-something-else)) | |
| 2165 (error | |
| 2166 (issue-warning-or) | |
| 2167 ;; but strangely, you don't need one here. | |
| 2168 (return-a-value-etc) | |
| 2169 )) | |
| 2170 | |
| 428 | 2171 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2172 error's condition names. If an error happens, the first applicable | |
| 2173 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2174 all errors, even those without the `error' condition name on them | |
| 2175 \(e.g. `quit'). | |
| 2176 | |
| 2177 The car of a handler may be a list of condition names | |
| 2178 instead of a single condition name. | |
| 2179 | |
| 2180 When a handler handles an error, | |
| 2181 control returns to the condition-case and the handler BODY... is executed | |
| 2182 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2183 VAR may be nil; then you do not get access to the signal information. | |
| 2184 | |
| 2185 The value of the last BODY form is returned from the condition-case. | |
| 2186 See also the function `signal' for more info. | |
| 2187 | |
| 2188 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2189 and the current catches, condition-cases, and bindings have all been | |
| 2190 popped back to the state they were in just before the call to | |
| 2191 `condition-case'. This means that resignalling the error from | |
| 2192 within the handler will not result in an infinite loop. | |
| 2193 | |
| 2194 If you want to establish an error handler that is called with the | |
| 2195 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2196 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2197 */ | |
| 2198 (args)) | |
| 2199 { | |
| 2200 /* This function can GC */ | |
| 2201 Lisp_Object var = XCAR (args); | |
| 2202 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2203 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2204 return condition_case_3 (bodyform, var, handlers); | |
| 2205 } | |
| 2206 | |
| 2207 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
4693
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Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2208 Call FUNCTION with arguments ARGS, regaining control on error. |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2209 |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2210 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2211 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2212 that was current when `signal' was called, rather than when the handler | |
| 2213 was established. | |
| 2214 | |
| 2215 HANDLER should be a function of one argument, which is a cons of the args | |
| 2216 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2217 `signal' is called (this differs from `condition-case', which allows | |
| 2218 you to specify which errors are trapped). If the handler function | |
| 2219 returns, `signal' continues as if the handler were never invoked. | |
| 2220 \(It continues to look for handlers established earlier than this one, | |
| 2221 and invokes the standard error-handler if none is found.) | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
2222 |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2223 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2224 */ |
| 2225 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2226 { | |
| 2227 /* This function can GC */ | |
| 2228 int speccount = specpdl_depth(); | |
| 2229 Lisp_Object tem; | |
| 2230 | |
| 853 | 2231 tem = Ffunction_max_args (args[0]); |
| 2232 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2233 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2234 invalid_argument ("Must be function of one argument", args[0]); | |
| 2235 | |
| 2236 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2237 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2238 record_unwind_protect (condition_bind_unwind, tem); | |
| 2239 Vcondition_handlers = tem; | |
| 2240 | |
| 2241 /* Caller should have GC-protected args */ | |
| 771 | 2242 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2243 } |
| 2244 | |
| 853 | 2245 /* This is the C version of the above function. It calls FUN, passing it |
| 2246 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2247 which they were signalled. (HANDLER is only invoked if there was no | |
| 2248 handler (either from condition-case or call-with-condition-handler) set | |
| 2249 later on that handled the signal; therefore, this is a real error. | |
| 2250 | |
| 2251 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2252 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2253 ARG be void * to facilitate passing structures, but I changed to | |
| 2254 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2255 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2256 to convert between Lisp_Objects and structure pointers. */ | |
| 2257 | |
| 2258 Lisp_Object | |
| 2259 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2260 Lisp_Object), | |
| 2261 Lisp_Object handler_arg, | |
| 2262 Lisp_Object (*fun) (Lisp_Object), | |
| 2263 Lisp_Object arg) | |
| 2264 { | |
| 2265 /* This function can GC */ | |
| 1111 | 2266 int speccount = specpdl_depth (); |
| 853 | 2267 Lisp_Object tem; |
| 2268 | |
| 2269 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2270 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2271 noseeum_cons (handler_arg, Qnil)), |
| 2272 Vcondition_handlers); | |
| 2273 record_unwind_protect (condition_bind_unwind, tem); | |
| 2274 Vcondition_handlers = tem; | |
| 2275 | |
| 2276 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2277 } | |
| 2278 | |
| 428 | 2279 static int |
| 2280 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2281 { | |
| 2282 if (EQ (type, Qt)) | |
| 2283 /* (condition-case c # (t c)) catches -all- signals | |
| 2284 * Use with caution! */ | |
| 2285 return 1; | |
| 2286 | |
| 2287 if (SYMBOLP (type)) | |
| 2288 return !NILP (Fmemq (type, conditions)); | |
| 2289 | |
| 2290 for (; CONSP (type); type = XCDR (type)) | |
| 2291 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2292 return 1; | |
| 2293 | |
| 2294 return 0; | |
| 2295 } | |
| 2296 | |
| 2297 static Lisp_Object | |
| 2298 return_from_signal (Lisp_Object value) | |
| 2299 { | |
| 2300 #if 1 | |
| 2301 /* Most callers are not prepared to handle gc if this | |
| 2302 returns. So, since this feature is not very useful, | |
| 2303 take it out. */ | |
| 2304 /* Have called debugger; return value to signaller */ | |
| 2305 return value; | |
| 2306 #else /* But the reality is that that stinks, because: */ | |
| 2307 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2308 to be continuable!! */ | |
| 563 | 2309 signal_error (Qunimplemented, |
| 2310 "Returning a value from an error is no longer supported", | |
| 2311 Qunbound); | |
| 428 | 2312 #endif |
| 2313 } | |
| 2314 | |
| 2315 | |
| 2316 /************************************************************************/ | |
| 2317 /* the workhorse error-signaling function */ | |
| 2318 /************************************************************************/ | |
| 2319 | |
| 853 | 2320 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2321 that won't get signalled for errors occurring when | |
| 2322 call_with_suspended_errors() was invoked. */ | |
| 2323 | |
| 872 | 2324 /* Don't make static or it might be compiled away */ |
| 2325 void signal_1 (void); | |
| 2326 | |
| 2327 void | |
| 853 | 2328 signal_1 (void) |
| 2329 { | |
| 2330 } | |
| 2331 | |
| 428 | 2332 /* #### This function has not been synched with FSF. It diverges |
| 2333 significantly. */ | |
| 2334 | |
| 853 | 2335 /* The simplest external error function: it would be called |
| 2336 signal_continuable_error() in the terminology below, but it's | |
| 2337 Lisp-callable. */ | |
| 2338 | |
| 2339 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2340 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2341 An error symbol is a symbol defined using `define-error'. | |
| 2342 DATA should be a list. Its elements are printed as part of the error message. | |
| 2343 If the signal is handled, DATA is made available to the handler. | |
| 2344 See also the function `signal-error', and the functions to handle errors: | |
| 2345 `condition-case' and `call-with-condition-handler'. | |
| 2346 | |
| 2347 Note that this function can return, if the debugger is invoked and the | |
| 2348 user invokes the "return from signal" option. | |
| 2349 */ | |
| 2350 (error_symbol, data)) | |
| 428 | 2351 { |
| 2352 /* This function can GC */ | |
| 853 | 2353 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2354 Lisp_Object conditions = Qnil; | |
| 2355 Lisp_Object handlers = Qnil; | |
| 428 | 2356 /* signal_call_debugger() could get called more than once |
| 2357 (once when a call-with-condition-handler is about to | |
| 2358 be dealt with, and another when a condition-case handler | |
| 2359 is about to be invoked). So make sure the debugger and/or | |
| 2360 stack trace aren't done more than once. */ | |
| 2361 int stack_trace_displayed = 0; | |
| 2362 int debugger_entered = 0; | |
| 853 | 2363 |
| 2364 /* Fsignal() is one of these functions that's called all the time | |
| 2365 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2366 protect the objects because all sorts of weird stuff could | |
| 2367 happen. */ | |
| 2368 | |
| 2369 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2370 | |
| 2371 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2372 signal_1 (); | |
| 428 | 2373 |
| 2374 if (!initialized) | |
| 2375 { | |
| 2376 /* who knows how much has been initialized? Safest bet is | |
| 2377 just to bomb out immediately. */ | |
| 771 | 2378 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2379 ABORT (); |
| 428 | 2380 } |
| 2381 | |
| 3092 | 2382 #ifndef NEW_GC |
| 1123 | 2383 assert (!gc_in_progress); |
| 3092 | 2384 #endif /* not NEW_GC */ |
| 1123 | 2385 |
| 2386 /* We abort if in_display and we are not protected, as garbage | |
| 2387 collections and non-local exits will invariably be fatal, but in | |
| 2388 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2389 */ | |
| 2390 | |
| 1318 | 2391 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2392 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2393 #endif |
| 428 | 2394 |
| 853 | 2395 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2396 |
| 2397 for (handlers = Vcondition_handlers; | |
| 2398 CONSP (handlers); | |
| 2399 handlers = XCDR (handlers)) | |
| 2400 { | |
| 2401 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2402 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2403 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2404 | |
| 2405 if (!UNBOUNDP (handler_fun)) | |
| 2406 { | |
| 2407 /* call-with-condition-handler */ | |
| 2408 Lisp_Object tem; | |
| 2409 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2410 struct gcpro ngcpro1; | |
| 2411 NGCPRO1 (all_handlers); | |
| 2412 Vcondition_handlers = outer_handlers; | |
| 2413 | |
| 853 | 2414 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2415 outer_handlers, 1, |
| 2416 &stack_trace_displayed, | |
| 2417 &debugger_entered); | |
| 2418 if (!UNBOUNDP (tem)) | |
| 2419 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2420 | |
| 853 | 2421 if (OPAQUE_PTRP (handler_fun)) |
| 2422 { | |
| 2423 if (NILP (handler_data)) | |
| 2424 { | |
| 2425 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2426 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2427 (get_opaque_ptr (handler_fun)); | |
| 2428 | |
| 2429 tem = (*hfun) (error_symbol, data); | |
| 2430 } | |
| 2431 else | |
| 2432 { | |
| 2433 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2434 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2435 (get_opaque_ptr (handler_fun)); | |
| 2436 | |
| 2437 assert (NILP (XCDR (handler_data))); | |
| 2438 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2439 } | |
| 2440 } | |
| 2441 else | |
| 2442 { | |
| 2443 tem = Fcons (error_symbol, data); | |
| 2444 if (NILP (handler_data)) | |
| 2445 tem = call1 (handler_fun, tem); | |
| 2446 else | |
| 2447 { | |
| 2448 /* (This code won't be used (for now?).) */ | |
| 2449 struct gcpro nngcpro1; | |
| 2450 Lisp_Object args[3]; | |
| 2451 NNGCPRO1 (args[0]); | |
| 2452 nngcpro1.nvars = 3; | |
| 2453 args[0] = handler_fun; | |
| 2454 args[1] = tem; | |
| 2455 args[2] = handler_data; | |
| 2456 nngcpro1.var = args; | |
| 2457 tem = Fapply (3, args); | |
| 2458 NNUNGCPRO; | |
| 2459 } | |
| 2460 } | |
| 428 | 2461 NUNGCPRO; |
| 2462 #if 0 | |
| 2463 if (!EQ (tem, Qsignal)) | |
| 2464 return return_from_signal (tem); | |
| 2465 #endif | |
| 2466 /* If handler didn't throw, try another handler */ | |
| 2467 Vcondition_handlers = all_handlers; | |
| 2468 } | |
| 2469 | |
| 2470 /* It's a condition-case handler */ | |
| 2471 | |
| 2472 /* t is used by handlers for all conditions, set up by C code. | |
| 2473 * debugger is not called even if debug_on_error */ | |
| 2474 else if (EQ (handler_data, Qt)) | |
| 2475 { | |
| 2476 UNGCPRO; | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2477 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
|
2478 0, Qnil, Qnil); |
| 428 | 2479 } |
| 2480 /* `error' is used similarly to the way `t' is used, but in | |
| 2481 addition it invokes the debugger if debug_on_error. | |
| 2482 This is normally used for the outer command-loop error | |
| 2483 handler. */ | |
| 2484 else if (EQ (handler_data, Qerror)) | |
| 2485 { | |
| 853 | 2486 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2487 data, | |
| 428 | 2488 outer_handlers, 0, |
| 2489 &stack_trace_displayed, | |
| 2490 &debugger_entered); | |
| 2491 | |
| 2492 UNGCPRO; | |
| 2493 if (!UNBOUNDP (tem)) | |
| 2494 return return_from_signal (tem); | |
| 2495 | |
| 853 | 2496 tem = Fcons (error_symbol, data); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2497 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2498 } |
| 2499 else | |
| 2500 { | |
| 2501 /* handler established by real (Lisp) condition-case */ | |
| 2502 Lisp_Object h; | |
| 2503 | |
| 2504 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2505 { | |
| 2506 Lisp_Object clause = Fcar (h); | |
| 2507 Lisp_Object tem = Fcar (clause); | |
| 2508 | |
| 2509 if (condition_type_p (tem, conditions)) | |
| 2510 { | |
| 853 | 2511 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2512 outer_handlers, 1, |
| 2513 &stack_trace_displayed, | |
| 2514 &debugger_entered); | |
| 2515 UNGCPRO; | |
| 2516 if (!UNBOUNDP (tem)) | |
| 2517 return return_from_signal (tem); | |
| 2518 | |
| 2519 /* Doesn't return */ | |
| 853 | 2520 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2521 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2522 } |
| 2523 } | |
| 2524 } | |
| 2525 } | |
| 2526 | |
| 2527 /* If no handler is present now, try to run the debugger, | |
| 2528 and if that fails, throw to top level. | |
| 2529 | |
| 2530 #### The only time that no handler is present is during | |
| 2531 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2532 there is no `top-level' catch. (That's why the |
| 428 | 2533 "bomb-out" hack was added.) |
| 2534 | |
| 853 | 2535 [[#### Fix this horrifitude!]] |
| 2536 | |
| 2537 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2538 | |
| 2539 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2540 &stack_trace_displayed, |
| 2541 &debugger_entered); | |
| 2542 UNGCPRO; | |
| 853 | 2543 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2544 data); /* Doesn't return */ | |
| 2268 | 2545 RETURN_NOT_REACHED (Qnil); |
| 428 | 2546 } |
| 2547 | |
| 2548 /****************** Error functions class 1 ******************/ | |
| 2549 | |
| 2550 /* Class 1: General functions that signal an error. | |
| 2551 These functions take an error type and a list of associated error | |
| 2552 data. */ | |
| 2553 | |
| 853 | 2554 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2555 |
| 2556 /* Signal a non-continuable error. */ | |
| 2557 | |
| 2558 DOESNT_RETURN | |
| 563 | 2559 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2560 { |
| 2561 for (;;) | |
| 2562 Fsignal (sig, data); | |
| 2563 } | |
| 853 | 2564 |
| 2565 #ifdef ERROR_CHECK_CATCH | |
| 2566 | |
| 2567 void | |
| 2568 check_catchlist_sanity (void) | |
| 2569 { | |
| 2570 #if 0 | |
| 2571 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2572 bug! */ | |
| 442 | 2573 struct catchtag *c; |
| 2574 int found_error_tag = 0; | |
| 2575 | |
| 2576 for (c = catchlist; c; c = c->next) | |
| 2577 { | |
| 2578 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2579 { | |
| 2580 found_error_tag = 1; | |
| 2581 break; | |
| 2582 } | |
| 2583 } | |
| 2584 | |
| 2585 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2586 #endif /* vou me tomar no cul */ |
| 2587 } | |
| 2588 | |
| 2589 void | |
| 2590 check_specbind_stack_sanity (void) | |
| 2591 { | |
| 2592 } | |
| 2593 | |
| 2594 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2595 |
| 2596 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2597 according to ERRB. CLASS is the class of warning and should | |
| 2598 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2599 Qresource, etc.). */ | |
| 2600 | |
| 2601 void | |
| 1204 | 2602 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2603 Error_Behavior errb) |
| 428 | 2604 { |
| 2605 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2606 return; | |
| 793 | 2607 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2608 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2609 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2610 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2611 else |
| 2612 for (;;) | |
| 2613 Fsignal (sig, data); | |
| 2614 } | |
| 2615 | |
| 2616 /* Signal a continuable error or display a warning or do nothing, | |
| 2617 according to ERRB. */ | |
| 2618 | |
| 2619 Lisp_Object | |
| 563 | 2620 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2621 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2622 { |
| 2623 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2624 return Qnil; | |
| 793 | 2625 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2626 { | |
| 1204 | 2627 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2628 return Qnil; |
| 2629 } | |
| 428 | 2630 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2631 { | |
| 1204 | 2632 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2633 return Qnil; |
| 2634 } | |
| 2635 else | |
| 2636 return Fsignal (sig, data); | |
| 2637 } | |
| 2638 | |
| 2639 | |
| 2640 /****************** Error functions class 2 ******************/ | |
| 2641 | |
| 563 | 2642 /* Class 2: Signal an error with a string and an associated object. |
| 2643 Normally these functions are used to attach one associated object, | |
| 2644 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2645 than one object, make a list of the objects with Qunbound as the | |
| 2646 first element. (If you have specifically two objects to attach, | |
| 2647 consider using the function in class 3 below.) These functions | |
| 2648 signal an error of a specified type, whose data is one or more | |
| 2649 objects (usually two), a string the related Lisp object(s) | |
| 2650 specified as FROB. */ | |
| 2651 | |
| 2652 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2653 to signal_error_1(). */ | |
| 2654 | |
| 2655 Lisp_Object | |
| 867 | 2656 build_error_data (const CIbyte *reason, Lisp_Object frob) |
| 563 | 2657 { |
| 2658 if (EQ (frob, Qunbound)) | |
| 2659 frob = Qnil; | |
| 2660 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2661 frob = XCDR (frob); | |
| 2662 else | |
| 2663 frob = list1 (frob); | |
| 2664 if (!reason) | |
| 2665 return frob; | |
| 2666 else | |
| 771 | 2667 return Fcons (build_msg_string (reason), frob); |
| 563 | 2668 } |
| 2669 | |
| 2670 DOESNT_RETURN | |
| 867 | 2671 signal_error (Lisp_Object type, const CIbyte *reason, Lisp_Object frob) |
| 563 | 2672 { |
| 2673 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2674 } | |
| 2675 | |
| 2676 void | |
| 867 | 2677 maybe_signal_error (Lisp_Object type, const CIbyte *reason, |
| 1204 | 2678 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2679 Error_Behavior errb) |
| 563 | 2680 { |
| 2681 /* Optimization: */ | |
| 2682 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2683 return; | |
| 1204 | 2684 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2685 } |
| 2686 | |
| 2687 Lisp_Object | |
| 867 | 2688 signal_continuable_error (Lisp_Object type, const CIbyte *reason, |
| 563 | 2689 Lisp_Object frob) |
| 2690 { | |
| 2691 return Fsignal (type, build_error_data (reason, frob)); | |
| 2692 } | |
| 2693 | |
| 2694 Lisp_Object | |
| 867 | 2695 maybe_signal_continuable_error (Lisp_Object type, const CIbyte *reason, |
| 1204 | 2696 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2697 Error_Behavior errb) |
| 563 | 2698 { |
| 2699 /* Optimization: */ | |
| 2700 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2701 return Qnil; | |
| 2702 return maybe_signal_continuable_error_1 (type, | |
| 2703 build_error_data (reason, frob), | |
| 1204 | 2704 class_, errb); |
| 563 | 2705 } |
| 2706 | |
| 2707 | |
| 2708 /****************** Error functions class 3 ******************/ | |
| 2709 | |
| 2710 /* Class 3: Signal an error with a string and two associated objects. | |
| 2711 These functions signal an error of a specified type, whose data | |
| 2712 is three objects, a string and two related Lisp objects. | |
| 2713 (The equivalent could be accomplished using the class 2 functions, | |
| 2714 but these are more convenient in this particular case.) */ | |
| 2715 | |
| 2716 DOESNT_RETURN | |
| 867 | 2717 signal_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2718 Lisp_Object frob0, Lisp_Object frob1) |
| 2719 { | |
| 771 | 2720 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2721 frob1)); |
| 2722 } | |
| 2723 | |
| 2724 void | |
| 867 | 2725 maybe_signal_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2726 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2727 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2728 { |
| 2729 /* Optimization: */ | |
| 2730 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2731 return; | |
| 771 | 2732 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2733 frob1), class_, errb); |
| 563 | 2734 } |
| 2735 | |
| 2736 Lisp_Object | |
| 867 | 2737 signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2738 Lisp_Object frob0, Lisp_Object frob1) |
| 2739 { | |
| 771 | 2740 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2741 frob1)); |
| 2742 } | |
| 2743 | |
| 2744 Lisp_Object | |
| 867 | 2745 maybe_signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2746 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2747 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2748 { |
| 2749 /* Optimization: */ | |
| 2750 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2751 return Qnil; | |
| 2752 return maybe_signal_continuable_error_1 | |
| 771 | 2753 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2754 class_, errb); |
| 563 | 2755 } |
| 2756 | |
| 2757 | |
| 2758 /****************** Error functions class 4 ******************/ | |
| 2759 | |
| 2760 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2761 These functions signal an error of a specified type, whose data |
| 428 | 2762 is a single string, created using the arguments. */ |
| 2763 | |
| 2764 DOESNT_RETURN | |
| 867 | 2765 signal_ferror (Lisp_Object type, const CIbyte *fmt, ...) |
| 442 | 2766 { |
| 2767 Lisp_Object obj; | |
| 2768 va_list args; | |
| 2769 | |
| 2770 va_start (args, fmt); | |
| 771 | 2771 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2772 va_end (args); |
| 2773 | |
| 2774 /* Fsignal GC-protects its args */ | |
| 563 | 2775 signal_error (type, 0, obj); |
| 442 | 2776 } |
| 2777 | |
| 2778 void | |
| 1204 | 2779 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
| 867 | 2780 const CIbyte *fmt, ...) |
| 442 | 2781 { |
| 2782 Lisp_Object obj; | |
| 2783 va_list args; | |
| 2784 | |
| 2785 /* Optimization: */ | |
| 2786 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2787 return; | |
| 2788 | |
| 2789 va_start (args, fmt); | |
| 771 | 2790 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2791 va_end (args); |
| 2792 | |
| 2793 /* Fsignal GC-protects its args */ | |
| 1204 | 2794 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2795 } |
| 2796 | |
| 2797 Lisp_Object | |
| 867 | 2798 signal_continuable_ferror (Lisp_Object type, const CIbyte *fmt, ...) |
| 428 | 2799 { |
| 2800 Lisp_Object obj; | |
| 2801 va_list args; | |
| 2802 | |
| 2803 va_start (args, fmt); | |
| 771 | 2804 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2805 va_end (args); |
| 2806 | |
| 2807 /* Fsignal GC-protects its args */ | |
| 2808 return Fsignal (type, list1 (obj)); | |
| 2809 } | |
| 2810 | |
| 2811 Lisp_Object | |
| 1204 | 2812 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
| 867 | 2813 Error_Behavior errb, const CIbyte *fmt, ...) |
| 442 | 2814 { |
| 2815 Lisp_Object obj; | |
| 2816 va_list args; | |
| 2817 | |
| 2818 /* Optimization: */ | |
| 2819 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2820 return Qnil; | |
| 2821 | |
| 2822 va_start (args, fmt); | |
| 771 | 2823 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2824 va_end (args); |
| 2825 | |
| 2826 /* Fsignal GC-protects its args */ | |
| 1204 | 2827 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2828 } |
| 2829 | |
| 2830 | |
| 2831 /****************** Error functions class 5 ******************/ | |
| 2832 | |
| 563 | 2833 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2834 These functions signal an error of a specified type, whose data |
| 563 | 2835 is a one or more objects, a string (created using the arguments) |
| 2836 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2837 is the same as for class 2.) | |
| 2838 | |
| 2839 There is no need for a class 6 because you can always attach 2 | |
| 2840 objects using class 5 (for FROB, specify a list with three | |
| 2841 elements, the first of which is Qunbound), and these functions are | |
| 2842 not commonly used. | |
| 2843 */ | |
| 442 | 2844 |
| 2845 DOESNT_RETURN | |
| 867 | 2846 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const CIbyte *fmt, |
| 563 | 2847 ...) |
| 442 | 2848 { |
| 2849 Lisp_Object obj; | |
| 2850 va_list args; | |
| 2851 | |
| 2852 va_start (args, fmt); | |
| 771 | 2853 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2854 va_end (args); |
| 2855 | |
| 2856 /* Fsignal GC-protects its args */ | |
| 563 | 2857 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2858 } |
| 2859 | |
| 2860 void | |
| 563 | 2861 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2862 Lisp_Object class_, Error_Behavior errb, |
| 867 | 2863 const CIbyte *fmt, ...) |
| 442 | 2864 { |
| 2865 Lisp_Object obj; | |
| 2866 va_list args; | |
| 2867 | |
| 2868 /* Optimization: */ | |
| 2869 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2870 return; | |
| 2871 | |
| 2872 va_start (args, fmt); | |
| 771 | 2873 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2874 va_end (args); |
| 2875 | |
| 2876 /* Fsignal GC-protects its args */ | |
| 1204 | 2877 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2878 errb); |
| 428 | 2879 } |
| 2880 | |
| 2881 Lisp_Object | |
| 563 | 2882 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 867 | 2883 const CIbyte *fmt, ...) |
| 428 | 2884 { |
| 2885 Lisp_Object obj; | |
| 2886 va_list args; | |
| 2887 | |
| 2888 va_start (args, fmt); | |
| 771 | 2889 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2890 va_end (args); |
| 2891 | |
| 2892 /* Fsignal GC-protects its args */ | |
| 563 | 2893 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2894 } |
| 2895 | |
| 2896 Lisp_Object | |
| 563 | 2897 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2898 Lisp_Object class_, |
| 578 | 2899 Error_Behavior errb, |
| 867 | 2900 const CIbyte *fmt, ...) |
| 428 | 2901 { |
| 2902 Lisp_Object obj; | |
| 2903 va_list args; | |
| 2904 | |
| 2905 /* Optimization: */ | |
| 2906 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2907 return Qnil; | |
| 2908 | |
| 2909 va_start (args, fmt); | |
| 771 | 2910 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2911 va_end (args); |
| 2912 | |
| 2913 /* Fsignal GC-protects its args */ | |
| 563 | 2914 return maybe_signal_continuable_error_1 (type, |
| 2915 Fcons (obj, | |
| 2916 build_error_data (0, frob)), | |
| 1204 | 2917 class_, errb); |
| 428 | 2918 } |
| 2919 | |
| 2920 | |
| 2921 /* This is what the QUIT macro calls to signal a quit */ | |
| 2922 void | |
| 2923 signal_quit (void) | |
| 2924 { | |
| 853 | 2925 /* This function cannot GC. GC is prohibited because most callers do |
| 2926 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2927 --ben */ | |
| 2928 | |
| 2929 int count; | |
| 2930 | |
| 428 | 2931 if (EQ (Vquit_flag, Qcritical)) |
| 2932 debug_on_quit |= 2; /* set critical bit. */ | |
| 2933 Vquit_flag = Qnil; | |
| 853 | 2934 count = begin_gc_forbidden (); |
| 428 | 2935 /* note that this is continuable. */ |
| 2936 Fsignal (Qquit, Qnil); | |
| 853 | 2937 unbind_to (count); |
| 428 | 2938 } |
| 2939 | |
| 2940 | |
| 563 | 2941 /************************ convenience error functions ***********************/ |
| 2942 | |
| 436 | 2943 Lisp_Object |
| 428 | 2944 signal_void_function_error (Lisp_Object function) |
| 2945 { | |
| 436 | 2946 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 2947 } |
| 2948 | |
| 436 | 2949 Lisp_Object |
| 428 | 2950 signal_invalid_function_error (Lisp_Object function) |
| 2951 { | |
| 436 | 2952 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 2953 } |
| 2954 | |
| 436 | 2955 Lisp_Object |
| 428 | 2956 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 2957 { | |
| 436 | 2958 return Fsignal (Qwrong_number_of_arguments, |
| 2959 list2 (function, make_int (nargs))); | |
| 428 | 2960 } |
| 2961 | |
| 2962 /* Used in list traversal macros for efficiency. */ | |
| 436 | 2963 DOESNT_RETURN |
| 428 | 2964 signal_malformed_list_error (Lisp_Object list) |
| 2965 { | |
| 563 | 2966 signal_error (Qmalformed_list, 0, list); |
| 428 | 2967 } |
| 2968 | |
| 436 | 2969 DOESNT_RETURN |
| 428 | 2970 signal_malformed_property_list_error (Lisp_Object list) |
| 2971 { | |
| 563 | 2972 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 2973 } |
| 2974 | |
| 436 | 2975 DOESNT_RETURN |
| 428 | 2976 signal_circular_list_error (Lisp_Object list) |
| 2977 { | |
| 563 | 2978 signal_error (Qcircular_list, 0, list); |
| 428 | 2979 } |
| 2980 | |
| 436 | 2981 DOESNT_RETURN |
| 428 | 2982 signal_circular_property_list_error (Lisp_Object list) |
| 2983 { | |
| 563 | 2984 signal_error (Qcircular_property_list, 0, list); |
| 428 | 2985 } |
| 442 | 2986 |
| 2267 | 2987 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 2988 DOESNT_RETURN |
| 867 | 2989 syntax_error (const CIbyte *reason, Lisp_Object frob) |
| 442 | 2990 { |
| 563 | 2991 signal_error (Qsyntax_error, reason, frob); |
| 442 | 2992 } |
| 2993 | |
| 2994 DOESNT_RETURN | |
| 867 | 2995 syntax_error_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 2996 { |
| 563 | 2997 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 2998 } | |
| 2999 | |
| 3000 void | |
| 867 | 3001 maybe_syntax_error (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3002 Lisp_Object class_, Error_Behavior errb) |
| 3003 { | |
| 3004 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3005 } |
| 3006 | |
| 3007 DOESNT_RETURN | |
| 867 | 3008 sferror (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3009 { |
| 3010 signal_error (Qstructure_formation_error, reason, frob); | |
| 3011 } | |
| 3012 | |
| 3013 DOESNT_RETURN | |
| 867 | 3014 sferror_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3015 { |
| 3016 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3017 } | |
| 3018 | |
| 3019 void | |
| 867 | 3020 maybe_sferror (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3021 Lisp_Object class_, Error_Behavior errb) |
| 3022 { | |
| 3023 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3024 } |
| 3025 | |
| 3026 DOESNT_RETURN | |
| 867 | 3027 invalid_argument (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3028 { |
| 563 | 3029 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3030 } |
| 3031 | |
| 3032 DOESNT_RETURN | |
| 867 | 3033 invalid_argument_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 3034 Lisp_Object frob2) |
| 442 | 3035 { |
| 563 | 3036 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3037 } | |
| 3038 | |
| 3039 void | |
| 867 | 3040 maybe_invalid_argument (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3041 Lisp_Object class_, Error_Behavior errb) |
| 3042 { | |
| 3043 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3044 } |
| 3045 | |
| 3046 DOESNT_RETURN | |
| 867 | 3047 invalid_constant (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3048 { |
| 3049 signal_error (Qinvalid_constant, reason, frob); | |
| 3050 } | |
| 3051 | |
| 3052 DOESNT_RETURN | |
| 867 | 3053 invalid_constant_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 3054 Lisp_Object frob2) |
| 563 | 3055 { |
| 3056 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3057 } | |
| 3058 | |
| 3059 void | |
| 867 | 3060 maybe_invalid_constant (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3061 Lisp_Object class_, Error_Behavior errb) |
| 3062 { | |
| 3063 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3064 } |
| 3065 | |
| 3066 DOESNT_RETURN | |
| 867 | 3067 invalid_operation (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3068 { |
| 563 | 3069 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3070 } |
| 3071 | |
| 3072 DOESNT_RETURN | |
| 867 | 3073 invalid_operation_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 3074 Lisp_Object frob2) |
| 442 | 3075 { |
| 563 | 3076 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3077 } | |
| 3078 | |
| 3079 void | |
| 867 | 3080 maybe_invalid_operation (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3081 Lisp_Object class_, Error_Behavior errb) |
| 3082 { | |
| 3083 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3084 } |
| 3085 | |
| 3086 DOESNT_RETURN | |
| 867 | 3087 invalid_change (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3088 { |
| 563 | 3089 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3090 } |
| 3091 | |
| 3092 DOESNT_RETURN | |
| 867 | 3093 invalid_change_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3094 { |
| 563 | 3095 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3096 } | |
| 3097 | |
| 3098 void | |
| 867 | 3099 maybe_invalid_change (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3100 Lisp_Object class_, Error_Behavior errb) |
| 3101 { | |
| 3102 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3103 } |
| 3104 | |
| 3105 DOESNT_RETURN | |
| 867 | 3106 invalid_state (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3107 { |
| 3108 signal_error (Qinvalid_state, reason, frob); | |
| 3109 } | |
| 3110 | |
| 3111 DOESNT_RETURN | |
| 867 | 3112 invalid_state_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3113 { |
| 3114 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3115 } | |
| 3116 | |
| 3117 void | |
| 867 | 3118 maybe_invalid_state (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3119 Lisp_Object class_, Error_Behavior errb) |
| 3120 { | |
| 3121 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3122 } |
| 3123 | |
| 3124 DOESNT_RETURN | |
| 867 | 3125 wtaerror (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3126 { |
| 3127 signal_error (Qwrong_type_argument, reason, frob); | |
| 3128 } | |
| 3129 | |
| 3130 DOESNT_RETURN | |
| 867 | 3131 stack_overflow (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3132 { |
| 3133 signal_error (Qstack_overflow, reason, frob); | |
| 3134 } | |
| 3135 | |
| 3136 DOESNT_RETURN | |
| 867 | 3137 out_of_memory (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3138 { |
| 3139 signal_error (Qout_of_memory, reason, frob); | |
| 3140 } | |
| 3141 | |
| 3142 DOESNT_RETURN | |
| 867 | 3143 printing_unreadable_object (const CIbyte *fmt, ...) |
| 563 | 3144 { |
| 3145 Lisp_Object obj; | |
| 3146 va_list args; | |
| 3147 | |
| 3148 va_start (args, fmt); | |
| 771 | 3149 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 563 | 3150 va_end (args); |
| 3151 | |
| 3152 /* Fsignal GC-protects its args */ | |
| 3153 signal_error (Qprinting_unreadable_object, 0, obj); | |
| 442 | 3154 } |
| 3155 | |
| 428 | 3156 |
| 3157 /************************************************************************/ | |
| 3158 /* User commands */ | |
| 3159 /************************************************************************/ | |
| 3160 | |
| 3161 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3162 Return t if FUNCTION makes provisions for interactive calling. | |
| 3163 This means it contains a description for how to read arguments to give it. | |
| 3164 The value is nil for an invalid function or a symbol with no function | |
| 3165 definition. | |
| 3166 | |
| 3167 Interactively callable functions include | |
| 3168 | |
| 3169 -- strings and vectors (treated as keyboard macros) | |
| 3170 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3171 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3172 (i.e. the interactive flag) | |
| 3173 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3174 value | |
| 3175 -- subrs (built-in functions) that are interactively callable | |
| 3176 | |
| 3177 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3178 */ | |
| 3179 (function)) | |
| 3180 { | |
| 3181 Lisp_Object fun = indirect_function (function, 0); | |
| 3182 | |
| 3183 if (COMPILED_FUNCTIONP (fun)) | |
| 3184 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3185 | |
| 3186 /* Lists may represent commands. */ | |
| 3187 if (CONSP (fun)) | |
| 3188 { | |
| 3189 Lisp_Object funcar = XCAR (fun); | |
| 3190 if (EQ (funcar, Qlambda)) | |
| 3191 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3192 if (EQ (funcar, Qautoload)) | |
| 3193 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3194 else | |
| 3195 return Qnil; | |
| 3196 } | |
| 3197 | |
| 3198 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3199 interactive spec. */ | |
| 3200 if (SUBRP (fun)) | |
| 3201 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3202 | |
| 3203 /* Strings and vectors are keyboard macros. */ | |
| 3204 if (VECTORP (fun) || STRINGP (fun)) | |
| 3205 return Qt; | |
| 3206 | |
| 3207 /* Everything else (including Qunbound) is not a command. */ | |
| 3208 return Qnil; | |
| 3209 } | |
| 3210 | |
| 3211 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3212 Execute CMD as an editor command. | |
| 3213 CMD must be an object that satisfies the `commandp' predicate. | |
| 3214 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3215 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3216 when reading the arguments. | |
| 3217 */ | |
| 444 | 3218 (cmd, record_flag, keys)) |
| 428 | 3219 { |
| 3220 /* This function can GC */ | |
| 3221 Lisp_Object prefixarg; | |
| 3222 Lisp_Object final = cmd; | |
| 4162 | 3223 PROFILE_DECLARE(); |
| 428 | 3224 struct console *con = XCONSOLE (Vselected_console); |
| 3225 | |
| 3226 prefixarg = con->prefix_arg; | |
| 3227 con->prefix_arg = Qnil; | |
| 3228 Vcurrent_prefix_arg = prefixarg; | |
| 3229 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3230 | |
| 3231 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3232 return run_hook (Qdisabled_command_hook); |
| 428 | 3233 |
| 3234 for (;;) | |
| 3235 { | |
| 3236 final = indirect_function (cmd, 1); | |
| 3237 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3238 { |
| 3239 /* do_autoload GCPROs both arguments */ | |
| 3240 do_autoload (final, cmd); | |
| 3241 } | |
| 428 | 3242 else |
| 3243 break; | |
| 3244 } | |
| 3245 | |
| 3246 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3247 { | |
| 3248 backtrace.function = &Qcall_interactively; | |
| 3249 backtrace.args = &cmd; | |
| 3250 backtrace.nargs = 1; | |
| 3251 backtrace.evalargs = 0; | |
| 1292 | 3252 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3253 backtrace.debug_on_exit = 0; |
| 1292 | 3254 backtrace.function_being_called = 0; |
| 428 | 3255 PUSH_BACKTRACE (backtrace); |
| 3256 | |
| 1292 | 3257 PROFILE_ENTER_FUNCTION (); |
| 444 | 3258 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3259 PROFILE_EXIT_FUNCTION (); |
| 428 | 3260 |
| 3261 POP_BACKTRACE (backtrace); | |
| 3262 return final; | |
| 3263 } | |
| 3264 else if (STRINGP (final) || VECTORP (final)) | |
| 3265 { | |
| 3266 return Fexecute_kbd_macro (final, prefixarg); | |
| 3267 } | |
| 3268 else | |
| 3269 { | |
| 3270 Fsignal (Qwrong_type_argument, | |
| 3271 Fcons (Qcommandp, | |
| 3272 (EQ (cmd, final) | |
| 3273 ? list1 (cmd) | |
| 3274 : list2 (cmd, final)))); | |
| 3275 return Qnil; | |
| 3276 } | |
| 3277 } | |
| 3278 | |
| 3279 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3280 Return t if function in which this appears was called interactively. | |
| 3281 This means that the function was called with call-interactively (which | |
| 3282 includes being called as the binding of a key) | |
| 3283 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3284 */ | |
| 3285 ()) | |
| 3286 { | |
| 3287 REGISTER struct backtrace *btp; | |
| 3288 REGISTER Lisp_Object fun; | |
| 3289 | |
| 3290 if (!INTERACTIVE) | |
| 3291 return Qnil; | |
| 3292 | |
| 3293 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3294 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3295 function). Note that *btp->function may be a symbol pointing at a | |
| 3296 compiled function. */ | |
| 3297 btp = backtrace_list; | |
| 3298 | |
| 3299 #if 0 /* FSFmacs */ | |
| 3300 | |
| 3301 /* #### FSFmacs does the following instead. I can't figure | |
| 3302 out which one is more correct. */ | |
| 3303 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3304 the top for Finteractive_p itself. If so, skip it. */ | |
| 3305 fun = Findirect_function (*btp->function); | |
| 3306 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3307 btp = btp->next; | |
| 3308 | |
| 3309 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3310 may be a frame for Fbyte_code. Now, given the strictest | |
| 3311 definition, this function isn't really being called | |
| 3312 interactively, but because that's the way Emacs 18 always builds | |
| 3313 byte-compiled functions, we'll accept it for now. */ | |
| 3314 if (EQ (*btp->function, Qbyte_code)) | |
| 3315 btp = btp->next; | |
| 3316 | |
| 3317 /* If this isn't a byte-compiled function, then we may now be | |
| 3318 looking at several frames for special forms. Skip past them. */ | |
| 3319 while (btp && | |
| 3320 btp->nargs == UNEVALLED) | |
| 3321 btp = btp->next; | |
| 3322 | |
| 3323 #else | |
| 3324 | |
| 3325 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3326 btp = btp->next; | |
| 3327 for (; | |
| 3328 btp && (btp->nargs == UNEVALLED | |
| 3329 || EQ (*btp->function, Qbyte_code)); | |
| 3330 btp = btp->next) | |
| 3331 {} | |
| 3332 /* btp now points at the frame of the innermost function | |
| 3333 that DOES eval its args. | |
| 3334 If it is a built-in function (such as load or eval-region) | |
| 3335 return nil. */ | |
| 3336 /* Beats me why this is necessary, but it is */ | |
| 3337 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3338 return Qt; | |
| 3339 | |
| 3340 #endif | |
| 3341 | |
| 3342 fun = Findirect_function (*btp->function); | |
| 3343 if (SUBRP (fun)) | |
| 3344 return Qnil; | |
| 3345 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3346 Return t if that function was called interactively. */ | |
| 3347 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3348 return Qt; | |
| 3349 return Qnil; | |
| 3350 } | |
| 3351 | |
| 3352 | |
| 3353 /************************************************************************/ | |
| 3354 /* Autoloading */ | |
| 3355 /************************************************************************/ | |
| 3356 | |
| 3357 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3358 Define FUNCTION to autoload from FILENAME. |
| 3359 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3360 The remaining optional arguments provide additional info about the | |
| 3361 real definition. | |
| 3362 DOCSTRING is documentation for FUNCTION. | |
| 3363 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3364 TYPE indicates the type of the object: | |
| 428 | 3365 nil or omitted says FUNCTION is a function, |
| 3366 `keymap' says FUNCTION is really a keymap, and | |
| 3367 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3368 If FUNCTION already has a non-void function definition that is not an |
| 3369 autoload object, this function does nothing and returns nil. | |
| 428 | 3370 */ |
| 444 | 3371 (function, filename, docstring, interactive, type)) |
| 428 | 3372 { |
| 3373 /* This function can GC */ | |
| 3374 CHECK_SYMBOL (function); | |
| 444 | 3375 CHECK_STRING (filename); |
| 428 | 3376 |
| 3377 /* If function is defined and not as an autoload, don't override */ | |
| 3378 { | |
| 3379 Lisp_Object f = XSYMBOL (function)->function; | |
| 3380 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3381 return Qnil; | |
| 3382 } | |
| 3383 | |
| 3384 if (purify_flag) | |
| 3385 { | |
| 3386 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3387 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3388 } |
| 440 | 3389 |
| 444 | 3390 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3391 docstring, |
| 3392 interactive, | |
| 3393 type))); | |
| 3394 } | |
| 3395 | |
| 3396 Lisp_Object | |
| 3397 un_autoload (Lisp_Object oldqueue) | |
| 3398 { | |
| 3399 /* This function can GC */ | |
| 3400 REGISTER Lisp_Object queue, first, second; | |
| 3401 | |
| 3402 /* Queue to unwind is current value of Vautoload_queue. | |
| 3403 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3404 queue = Vautoload_queue; | |
| 3405 Vautoload_queue = oldqueue; | |
| 3406 while (CONSP (queue)) | |
| 3407 { | |
| 3408 first = XCAR (queue); | |
| 3409 second = Fcdr (first); | |
| 3410 first = Fcar (first); | |
| 3411 if (NILP (second)) | |
| 3412 Vfeatures = first; | |
| 3413 else | |
| 3414 Ffset (first, second); | |
| 3415 queue = Fcdr (queue); | |
| 3416 } | |
| 3417 return Qnil; | |
| 3418 } | |
| 3419 | |
| 970 | 3420 /* do_autoload GCPROs both arguments */ |
| 428 | 3421 void |
| 3422 do_autoload (Lisp_Object fundef, | |
| 3423 Lisp_Object funname) | |
| 3424 { | |
| 3425 /* This function can GC */ | |
| 3426 int speccount = specpdl_depth(); | |
| 3427 Lisp_Object fun = funname; | |
| 970 | 3428 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3429 |
| 3430 CHECK_SYMBOL (funname); | |
| 970 | 3431 GCPRO3 (fundef, funname, fun); |
| 428 | 3432 |
| 3433 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3434 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3435 Vautoload_queue = Qt; | |
| 3436 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3437 | |
| 3438 { | |
| 3439 Lisp_Object queue; | |
| 3440 | |
| 3441 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3442 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3443 { | |
| 3444 Lisp_Object first = XCAR (queue); | |
| 3445 Lisp_Object second = Fcdr (first); | |
| 3446 | |
| 3447 first = Fcar (first); | |
| 3448 | |
| 3449 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3450 may be an atom if the autoload entry was generated by a defalias | |
| 3451 or fset. */ | |
| 3452 if (CONSP (second)) | |
| 3453 Fput (first, Qautoload, (XCDR (second))); | |
| 3454 } | |
| 3455 } | |
| 3456 | |
| 3457 /* Once loading finishes, don't undo it. */ | |
| 3458 Vautoload_queue = Qt; | |
| 771 | 3459 unbind_to (speccount); |
| 428 | 3460 |
| 3461 fun = indirect_function (fun, 0); | |
| 3462 | |
| 3463 #if 0 /* FSFmacs */ | |
| 3464 if (!NILP (Fequal (fun, fundef))) | |
| 3465 #else | |
| 3466 if (UNBOUNDP (fun) | |
| 3467 || (CONSP (fun) | |
| 3468 && EQ (XCAR (fun), Qautoload))) | |
| 3469 #endif | |
| 563 | 3470 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3471 UNGCPRO; |
| 3472 } | |
| 3473 | |
| 3474 | |
| 3475 /************************************************************************/ | |
| 3476 /* eval, funcall, apply */ | |
| 3477 /************************************************************************/ | |
| 3478 | |
| 814 | 3479 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3480 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3481 -- in particular, the calling of subrs and compiled functions, the most | |
| 3482 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3483 to do to squeeze more speed out except by switching to lexical | |
| 3484 variables, which would eliminate the specbind loop. (But the real gain | |
| 3485 from lexical variables would come from better optimization -- with | |
| 3486 dynamic binding, you have the constant problem that any function call | |
| 3487 that you haven't explicitly proven to be side-effect-free might | |
| 3488 potentially side effect your local variables, which makes optimization | |
| 3489 extremely difficult when there are function calls anywhere in a chunk of | |
| 3490 code to be optimized. Even worse, you don't know that *your* local | |
| 3491 variables aren't side-effecting an outer function's local variables, so | |
| 3492 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3493 | |
| 428 | 3494 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3495 int nargs, Lisp_Object args[]); |
| 428 | 3496 static int in_warnings; |
| 3497 | |
| 3498 | |
| 814 | 3499 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3500 int nargs, | |
| 3501 Lisp_Object args[]); | |
| 3502 | |
| 3503 /* The theory behind making this a separate function is to shrink | |
| 3504 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3505 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3506 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3507 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3508 | |
| 3509 void | |
| 3510 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3511 Lisp_Object args[]) | |
| 3512 { | |
| 3513 REGISTER int i = 0; | |
| 3514 int max_non_rest_args = f->args_in_array - 1; | |
| 3515 int bindargs = min (nargs, max_non_rest_args); | |
| 3516 | |
| 3517 for (i = 0; i < bindargs; i++) | |
| 3092 | 3518 #ifdef NEW_GC |
| 3519 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3520 args[i]); | |
| 3521 #else /* not NEW_GC */ | |
| 814 | 3522 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3523 #endif /* not NEW_GC */ |
| 814 | 3524 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3525 #ifdef NEW_GC |
| 3526 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3527 Qnil); | |
| 3528 #else /* not NEW_GC */ | |
| 814 | 3529 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3530 #endif /* not NEW_GC */ |
| 3531 #ifdef NEW_GC | |
| 3532 SPECBIND_FAST_UNSAFE | |
| 3533 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3534 nargs > max_non_rest_args ? | |
| 3535 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3536 Qnil); | |
| 3537 #else /* not NEW_GC */ | |
| 814 | 3538 SPECBIND_FAST_UNSAFE |
| 3539 (f->args[max_non_rest_args], | |
| 3540 nargs > max_non_rest_args ? | |
| 3541 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3542 Qnil); | |
| 3092 | 3543 #endif /* not NEW_GC */ |
| 814 | 3544 } |
| 3545 | |
| 3546 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3547 in ARGS, and return the result of evaluation. */ | |
| 3548 inline static Lisp_Object | |
| 3549 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3550 { | |
| 3551 /* This function can GC */ | |
| 3552 int speccount = specpdl_depth(); | |
| 3553 REGISTER int i = 0; | |
| 3554 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3555 | |
| 3556 if (!OPAQUEP (f->instructions)) | |
| 3557 /* Lazily munge the instructions into a more efficient form */ | |
| 3558 optimize_compiled_function (fun); | |
| 3559 | |
| 3560 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3561 the required space on the specbinding stack for binding the args | |
| 3562 and local variables of fun. So just reserve it once. */ | |
| 3563 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3564 | |
| 3565 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3566 optional arguments. */ | |
| 3567 { | |
| 3568 #if 1 | |
| 3569 for (i = 0; i < nargs; i++) | |
| 3092 | 3570 #ifdef NEW_GC |
| 3571 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3572 args[i]); | |
| 3573 #else /* not NEW_GC */ | |
| 814 | 3574 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3575 #endif /* not NEW_GC */ |
| 814 | 3576 #else |
| 3577 /* Here's an alternate way to write the loop that tries to further | |
| 3578 optimize funcalls for functions with few arguments by partially | |
| 3579 unrolling the loop. It's not clear whether this is a win since it | |
| 3580 increases the size of the function and the possibility of L1 cache | |
| 3581 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3582 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3583 compiler repeatedly and looking at the total time, show very | |
| 3584 little difference between the simple loop above, the unrolled code | |
| 3585 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3586 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3587 because it's smaller. */ | |
| 3588 switch (nargs) | |
| 3589 { | |
| 3590 default: | |
| 3591 for (i = nargs - 1; i >= 4; i--) | |
| 3592 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3593 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3594 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3595 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3596 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3597 case 0: break; | |
| 3598 } | |
| 3599 #endif | |
| 3600 } | |
| 3601 else if (nargs < f->min_args) | |
| 3602 goto wrong_number_of_arguments; | |
| 3603 else if (nargs < f->max_args) | |
| 3604 { | |
| 3605 for (i = 0; i < nargs; i++) | |
| 3092 | 3606 #ifdef NEW_GC |
| 3607 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3608 args[i]); | |
| 3609 #else /* not NEW_GC */ | |
| 814 | 3610 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3611 #endif /* not NEW_GC */ |
| 814 | 3612 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3613 #ifdef NEW_GC |
| 3614 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3615 Qnil); | |
| 3616 #else /* not NEW_GC */ | |
| 814 | 3617 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3618 #endif /* not NEW_GC */ |
| 814 | 3619 } |
| 3620 else if (f->max_args == MANY) | |
| 3621 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3622 else | |
| 3623 { | |
| 3624 wrong_number_of_arguments: | |
| 3625 /* The actual printed compiled_function object is incomprehensible. | |
| 3626 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3627 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3628 fun = *backtrace_list->function; | |
| 3629 return Fsignal (Qwrong_number_of_arguments, | |
| 3630 list2 (fun, make_int (nargs))); | |
| 3631 } | |
| 3632 | |
| 3633 { | |
| 3634 Lisp_Object value = | |
| 3635 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions), | |
| 3636 f->stack_depth, | |
| 3637 XVECTOR_DATA (f->constants)); | |
| 3638 | |
| 3639 /* The attempt to optimize this by only unbinding variables failed | |
| 3640 because using buffer-local variables as function parameters | |
| 3641 leads to specpdl_ptr->func != 0 */ | |
| 3642 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3643 UNBIND_TO_GCPRO (speccount, value); | |
| 3644 return value; | |
| 3645 } | |
| 3646 } | |
| 3647 | |
| 428 | 3648 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3649 Evaluate FORM and return its value. | |
| 3650 */ | |
| 3651 (form)) | |
| 3652 { | |
| 3653 /* This function can GC */ | |
| 3654 Lisp_Object fun, val, original_fun, original_args; | |
| 3655 int nargs; | |
| 4162 | 3656 PROFILE_DECLARE(); |
| 428 | 3657 |
| 1318 | 3658 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3659 check_proper_critical_section_lisp_protection (); | |
| 3660 #endif | |
| 3661 | |
| 3989 | 3662 if (!CONSP (form)) |
| 3663 { | |
| 3664 if (SYMBOLP (form)) | |
| 3665 { | |
| 3666 return Fsymbol_value (form); | |
| 3667 } | |
| 3668 | |
| 3669 return form; | |
| 3670 } | |
| 3671 | |
| 428 | 3672 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3673 while (!in_warnings && !NILP (Vpending_warnings) |
| 3674 /* well, perhaps not so safe after all! */ | |
| 3675 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3676 { |
| 3677 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3678 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3679 int speccount = internal_bind_int (&in_warnings, 1); |
| 3680 | |
| 428 | 3681 this_warning_cons = Vpending_warnings; |
| 3682 this_warning = XCAR (this_warning_cons); | |
| 3683 /* in case an error occurs in the warn function, at least | |
| 3684 it won't happen infinitely */ | |
| 3685 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3686 free_cons (this_warning_cons); |
| 1204 | 3687 class_ = XCAR (this_warning); |
| 428 | 3688 level = XCAR (XCDR (this_warning)); |
| 3689 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3690 free_list (this_warning); | |
| 3691 | |
| 3692 if (NILP (Vpending_warnings)) | |
| 3693 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3694 but safer */ | |
| 3695 | |
| 1204 | 3696 GCPRO4 (form, class_, level, messij); |
| 428 | 3697 if (!STRINGP (messij)) |
| 3698 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3699 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3700 UNGCPRO; |
| 771 | 3701 unbind_to (speccount); |
| 428 | 3702 } |
| 3703 | |
| 3704 QUIT; | |
| 814 | 3705 if (need_to_garbage_collect) |
| 428 | 3706 { |
| 3707 struct gcpro gcpro1; | |
| 3708 GCPRO1 (form); | |
| 3092 | 3709 #ifdef NEW_GC |
| 3710 gc_incremental (); | |
| 3711 #else /* not NEW_GC */ | |
| 428 | 3712 garbage_collect_1 (); |
| 3092 | 3713 #endif /* not NEW_GC */ |
| 428 | 3714 UNGCPRO; |
| 3715 } | |
| 3716 | |
| 3717 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3718 { | |
| 3719 if (max_lisp_eval_depth < 100) | |
| 3720 max_lisp_eval_depth = 100; | |
| 3721 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3722 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3723 Qunbound); | |
| 428 | 3724 } |
| 3725 | |
| 3726 /* We guaranteed CONSP (form) above */ | |
| 3727 original_fun = XCAR (form); | |
| 3728 original_args = XCDR (form); | |
| 3729 | |
| 3730 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3731 | |
| 3732 backtrace.pdlcount = specpdl_depth(); | |
| 3733 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3734 backtrace.args = &original_args; | |
| 3735 backtrace.nargs = UNEVALLED; | |
| 3736 backtrace.evalargs = 1; | |
| 3737 backtrace.debug_on_exit = 0; | |
| 1292 | 3738 backtrace.function_being_called = 0; |
| 428 | 3739 PUSH_BACKTRACE (backtrace); |
| 3740 | |
| 3741 if (debug_on_next_call) | |
| 3742 do_debug_on_call (Qt); | |
| 3743 | |
| 3744 /* At this point, only original_fun and original_args | |
| 3745 have values that will be used below. */ | |
| 3746 retry: | |
| 3989 | 3747 /* Optimise for no indirection. */ |
| 3748 fun = original_fun; | |
| 3749 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3750 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3751 { | |
| 3752 fun = indirect_function(original_fun, 1); | |
| 3753 } | |
| 428 | 3754 |
| 3755 if (SUBRP (fun)) | |
| 3756 { | |
| 3757 Lisp_Subr *subr = XSUBR (fun); | |
| 3758 int max_args = subr->max_args; | |
| 3759 | |
| 3760 if (nargs < subr->min_args) | |
| 3761 goto wrong_number_of_arguments; | |
| 3762 | |
| 3763 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3764 { | |
| 3765 backtrace.evalargs = 0; | |
| 1292 | 3766 PROFILE_ENTER_FUNCTION (); |
| 428 | 3767 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3768 (original_args)); | |
| 1292 | 3769 PROFILE_EXIT_FUNCTION (); |
| 428 | 3770 } |
| 3771 else if (nargs <= max_args) | |
| 3772 { | |
| 3773 struct gcpro gcpro1; | |
| 3774 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3775 REGISTER Lisp_Object *p = args; | |
| 3776 | |
| 3777 GCPRO1 (args[0]); | |
| 3778 gcpro1.nvars = 0; | |
| 3779 | |
| 3780 { | |
| 3781 LIST_LOOP_2 (arg, original_args) | |
| 3782 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3783 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3784 gcpro1.nvars++; |
| 3785 } | |
| 3786 } | |
| 3787 | |
| 3788 /* &optional args default to nil. */ | |
| 3789 while (p - args < max_args) | |
| 3790 *p++ = Qnil; | |
| 3791 | |
| 3792 backtrace.args = args; | |
| 3793 backtrace.nargs = nargs; | |
| 3794 | |
| 1292 | 3795 PROFILE_ENTER_FUNCTION (); |
| 428 | 3796 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3797 PROFILE_EXIT_FUNCTION (); |
| 428 | 3798 |
| 3799 UNGCPRO; | |
| 3800 } | |
| 3801 else if (max_args == MANY) | |
| 3802 { | |
| 3803 /* Pass a vector of evaluated arguments */ | |
| 3804 struct gcpro gcpro1; | |
| 3805 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3806 REGISTER Lisp_Object *p = args; | |
| 3807 | |
| 3808 GCPRO1 (args[0]); | |
| 3809 gcpro1.nvars = 0; | |
| 3810 | |
| 3811 { | |
| 3812 LIST_LOOP_2 (arg, original_args) | |
| 3813 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3814 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3815 gcpro1.nvars++; |
| 3816 } | |
| 3817 } | |
| 3818 | |
| 3819 backtrace.args = args; | |
| 3820 backtrace.nargs = nargs; | |
| 3821 | |
| 1292 | 3822 PROFILE_ENTER_FUNCTION (); |
| 428 | 3823 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3824 (nargs, args)); | |
| 1292 | 3825 PROFILE_EXIT_FUNCTION (); |
| 428 | 3826 |
| 3827 UNGCPRO; | |
| 3828 } | |
| 3829 else | |
| 3830 { | |
| 3831 wrong_number_of_arguments: | |
| 440 | 3832 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3833 } |
| 3834 } | |
| 3835 else if (COMPILED_FUNCTIONP (fun)) | |
| 3836 { | |
| 3837 struct gcpro gcpro1; | |
| 3838 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3839 REGISTER Lisp_Object *p = args; | |
| 3840 | |
| 3841 GCPRO1 (args[0]); | |
| 3842 gcpro1.nvars = 0; | |
| 3843 | |
| 3844 { | |
| 3845 LIST_LOOP_2 (arg, original_args) | |
| 3846 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3847 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3848 gcpro1.nvars++; |
| 3849 } | |
| 3850 } | |
| 3851 | |
| 3852 backtrace.args = args; | |
| 3853 backtrace.nargs = nargs; | |
| 3854 backtrace.evalargs = 0; | |
| 3855 | |
| 1292 | 3856 PROFILE_ENTER_FUNCTION (); |
| 428 | 3857 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3858 PROFILE_EXIT_FUNCTION (); |
| 428 | 3859 |
| 3860 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3861 if (backtrace.debug_on_exit) | |
| 3862 val = do_debug_on_exit (val); | |
| 3863 /* Don't do it again when we return to eval. */ | |
| 3864 backtrace.debug_on_exit = 0; | |
| 3865 | |
| 3866 UNGCPRO; | |
| 3867 } | |
| 3868 else if (CONSP (fun)) | |
| 3869 { | |
| 3870 Lisp_Object funcar = XCAR (fun); | |
| 3871 | |
| 3872 if (EQ (funcar, Qautoload)) | |
| 3873 { | |
| 970 | 3874 /* do_autoload GCPROs both arguments */ |
| 428 | 3875 do_autoload (fun, original_fun); |
| 3876 goto retry; | |
| 3877 } | |
| 3878 else if (EQ (funcar, Qmacro)) | |
| 3879 { | |
| 1292 | 3880 PROFILE_ENTER_FUNCTION (); |
| 428 | 3881 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3882 PROFILE_EXIT_FUNCTION (); |
| 428 | 3883 } |
| 3884 else if (EQ (funcar, Qlambda)) | |
| 3885 { | |
| 3886 struct gcpro gcpro1; | |
| 3887 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3888 REGISTER Lisp_Object *p = args; | |
| 3889 | |
| 3890 GCPRO1 (args[0]); | |
| 3891 gcpro1.nvars = 0; | |
| 3892 | |
| 3893 { | |
| 3894 LIST_LOOP_2 (arg, original_args) | |
| 3895 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3896 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3897 gcpro1.nvars++; |
| 3898 } | |
| 3899 } | |
| 3900 | |
| 3901 UNGCPRO; | |
| 3902 | |
| 3903 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3904 backtrace.nargs = nargs; | |
| 3905 backtrace.evalargs = 0; | |
| 3906 | |
| 1292 | 3907 PROFILE_ENTER_FUNCTION (); |
| 428 | 3908 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3909 PROFILE_EXIT_FUNCTION (); |
| 428 | 3910 |
| 3911 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3912 if (backtrace.debug_on_exit) | |
| 3913 val = do_debug_on_exit (val); | |
| 3914 /* Don't do it again when we return to eval. */ | |
| 3915 backtrace.debug_on_exit = 0; | |
| 3916 } | |
| 3917 else | |
| 3918 { | |
| 3919 goto invalid_function; | |
| 3920 } | |
| 3921 } | |
| 4104 | 3922 else if (UNBOUNDP (fun)) |
| 3923 { | |
| 3924 val = signal_void_function_error (original_fun); | |
| 3925 } | |
| 3926 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3927 UNBOUNDP (fun)) */ | |
| 428 | 3928 { |
| 3929 invalid_function: | |
| 436 | 3930 val = signal_invalid_function_error (fun); |
| 428 | 3931 } |
| 3932 | |
| 3933 lisp_eval_depth--; | |
| 3934 if (backtrace.debug_on_exit) | |
| 3935 val = do_debug_on_exit (val); | |
| 3936 POP_BACKTRACE (backtrace); | |
| 3937 return val; | |
| 3938 } | |
| 3939 | |
| 3940 | |
| 1111 | 3941 |
| 3942 static void | |
| 3943 run_post_gc_hook (void) | |
| 3944 { | |
| 3945 Lisp_Object args[2]; | |
| 3946 | |
| 3947 args[0] = Qpost_gc_hook; | |
| 3948 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 3949 | |
| 3950 run_hook_with_args_trapping_problems | |
| 1333 | 3951 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 3952 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 3953 } | |
| 3954 | |
| 428 | 3955 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
|
3956 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 3957 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
|
3958 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
3959 arguments: (FUNCTION &rest ARGS) |
| 428 | 3960 */ |
| 3961 (int nargs, Lisp_Object *args)) | |
| 3962 { | |
| 3963 /* This function can GC */ | |
| 3964 Lisp_Object fun; | |
| 3965 Lisp_Object val; | |
| 4162 | 3966 PROFILE_DECLARE(); |
| 428 | 3967 int fun_nargs = nargs - 1; |
| 3968 Lisp_Object *fun_args = args + 1; | |
| 3969 | |
| 1318 | 3970 /* QUIT will check for proper redisplay wrapping */ |
| 3971 | |
| 428 | 3972 QUIT; |
| 851 | 3973 |
| 3974 if (funcall_allocation_flag) | |
| 3975 { | |
| 3976 if (need_to_garbage_collect) | |
| 3977 /* Callers should gcpro lexpr args */ | |
| 3092 | 3978 #ifdef NEW_GC |
| 3979 gc_incremental (); | |
| 3980 #else /* not NEW_GC */ | |
| 851 | 3981 garbage_collect_1 (); |
| 3092 | 3982 #endif /* not NEW_GC */ |
| 851 | 3983 if (need_to_check_c_alloca) |
| 3984 { | |
| 3985 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 3986 { | |
| 3987 xemacs_c_alloca (0); | |
| 3988 funcall_alloca_count = 0; | |
| 3989 } | |
| 3990 } | |
| 887 | 3991 if (need_to_signal_post_gc) |
| 3992 { | |
| 3993 need_to_signal_post_gc = 0; | |
| 1111 | 3994 recompute_funcall_allocation_flag (); |
| 3263 | 3995 #ifdef NEW_GC |
| 3996 run_finalizers (); | |
| 3997 #endif /* NEW_GC */ | |
| 1111 | 3998 run_post_gc_hook (); |
| 887 | 3999 } |
| 851 | 4000 } |
| 428 | 4001 |
| 4002 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 4003 { | |
| 4004 if (max_lisp_eval_depth < 100) | |
| 4005 max_lisp_eval_depth = 100; | |
| 4006 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 4007 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 4008 Qunbound); | |
| 428 | 4009 } |
| 4010 | |
| 1292 | 4011 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4012 backtrace.function = &args[0]; |
| 4013 backtrace.args = fun_args; | |
| 4014 backtrace.nargs = fun_nargs; | |
| 4015 backtrace.evalargs = 0; | |
| 4016 backtrace.debug_on_exit = 0; | |
| 1292 | 4017 backtrace.function_being_called = 0; |
| 428 | 4018 PUSH_BACKTRACE (backtrace); |
| 4019 | |
| 4020 if (debug_on_next_call) | |
| 4021 do_debug_on_call (Qlambda); | |
| 4022 | |
| 4023 retry: | |
| 4024 | |
| 4025 fun = args[0]; | |
| 4026 | |
| 4027 /* We could call indirect_function directly, but profiling shows | |
| 4028 this is worth optimizing by partially unrolling the loop. */ | |
| 4029 if (SYMBOLP (fun)) | |
| 4030 { | |
| 4031 fun = XSYMBOL (fun)->function; | |
| 4032 if (SYMBOLP (fun)) | |
| 4033 { | |
| 4034 fun = XSYMBOL (fun)->function; | |
| 4035 if (SYMBOLP (fun)) | |
| 4036 fun = indirect_function (fun, 1); | |
| 4037 } | |
| 4038 } | |
| 4039 | |
| 4040 if (SUBRP (fun)) | |
| 4041 { | |
| 4042 Lisp_Subr *subr = XSUBR (fun); | |
| 4043 int max_args = subr->max_args; | |
| 4044 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4045 | |
| 4046 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4047 { | |
| 4048 funcall_subr: | |
| 1292 | 4049 PROFILE_ENTER_FUNCTION (); |
| 428 | 4050 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4051 PROFILE_EXIT_FUNCTION (); |
| 428 | 4052 } |
| 436 | 4053 else if (fun_nargs < subr->min_args) |
| 4054 { | |
| 4055 goto wrong_number_of_arguments; | |
| 4056 } | |
| 428 | 4057 else if (fun_nargs < max_args) |
| 4058 { | |
| 4059 Lisp_Object *p = spacious_args; | |
| 4060 | |
| 4061 /* Default optionals to nil */ | |
| 4062 while (fun_nargs--) | |
| 4063 *p++ = *fun_args++; | |
| 4064 while (p - spacious_args < max_args) | |
| 4065 *p++ = Qnil; | |
| 4066 | |
| 4067 fun_args = spacious_args; | |
| 4068 goto funcall_subr; | |
| 4069 } | |
| 4070 else if (max_args == MANY) | |
| 4071 { | |
| 1292 | 4072 PROFILE_ENTER_FUNCTION (); |
| 436 | 4073 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4074 PROFILE_EXIT_FUNCTION (); |
| 428 | 4075 } |
| 4076 else if (max_args == UNEVALLED) /* Can't funcall a special form */ | |
| 4077 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4078 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4079 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4080 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4081 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4082 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4083 } |
| 428 | 4084 goto invalid_function; |
| 4085 } | |
| 4086 else | |
| 4087 { | |
| 4088 wrong_number_of_arguments: | |
| 436 | 4089 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4090 } |
| 4091 } | |
| 4092 else if (COMPILED_FUNCTIONP (fun)) | |
| 4093 { | |
| 1292 | 4094 PROFILE_ENTER_FUNCTION (); |
| 428 | 4095 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4096 PROFILE_EXIT_FUNCTION (); |
| 428 | 4097 } |
| 4098 else if (CONSP (fun)) | |
| 4099 { | |
| 4100 Lisp_Object funcar = XCAR (fun); | |
| 4101 | |
| 4102 if (EQ (funcar, Qlambda)) | |
| 4103 { | |
| 1292 | 4104 PROFILE_ENTER_FUNCTION (); |
| 428 | 4105 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4106 PROFILE_EXIT_FUNCTION (); |
| 428 | 4107 } |
| 4108 else if (EQ (funcar, Qautoload)) | |
| 4109 { | |
| 970 | 4110 /* do_autoload GCPROs both arguments */ |
| 428 | 4111 do_autoload (fun, args[0]); |
| 4112 goto retry; | |
| 4113 } | |
| 4114 else /* Can't funcall a macro */ | |
| 4115 { | |
| 4116 goto invalid_function; | |
| 4117 } | |
| 4118 } | |
| 4119 else if (UNBOUNDP (fun)) | |
| 4120 { | |
| 436 | 4121 val = signal_void_function_error (args[0]); |
| 428 | 4122 } |
| 4123 else | |
| 4124 { | |
| 4125 invalid_function: | |
| 436 | 4126 val = signal_invalid_function_error (fun); |
| 428 | 4127 } |
| 4128 | |
| 4129 lisp_eval_depth--; | |
| 4130 if (backtrace.debug_on_exit) | |
| 4131 val = do_debug_on_exit (val); | |
| 4132 POP_BACKTRACE (backtrace); | |
| 4133 return val; | |
| 4134 } | |
| 4135 | |
| 4136 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4137 Return t if OBJECT can be called as a function, else nil. | |
| 4138 A function is an object that can be applied to arguments, | |
| 4139 using for example `funcall' or `apply'. | |
| 4140 */ | |
| 4141 (object)) | |
| 4142 { | |
| 4143 if (SYMBOLP (object)) | |
| 4144 object = indirect_function (object, 0); | |
| 4145 | |
| 919 | 4146 if (COMPILED_FUNCTIONP (object) || SUBRP (object)) |
| 4147 return Qt; | |
| 4148 if (CONSP (object)) | |
| 4149 { | |
| 4150 Lisp_Object car = XCAR (object); | |
| 4151 if (EQ (car, Qlambda)) | |
| 4152 return Qt; | |
| 4153 if (EQ (car, Qautoload) | |
| 4154 && NILP (Fcar_safe (Fcdr_safe (Fcdr_safe (Fcdr_safe (XCDR (object))))))) | |
| 4155 return Qt; | |
| 4156 } | |
| 4157 return Qnil; | |
| 428 | 4158 } |
| 4159 | |
| 4160 static Lisp_Object | |
| 4161 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4162 { | |
| 4163 Lisp_Object orig_function = function; | |
| 4164 Lisp_Object arglist; | |
| 4165 | |
| 4166 retry: | |
| 4167 | |
| 4168 if (SYMBOLP (function)) | |
| 4169 function = indirect_function (function, 1); | |
| 4170 | |
| 4171 if (SUBRP (function)) | |
| 4172 { | |
| 442 | 4173 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4174 if (function_min_args_p) | |
| 4175 return Fsubr_min_args (function); | |
| 4176 else | |
| 4177 return Fsubr_max_args (function); | |
| 428 | 4178 } |
| 4179 else if (COMPILED_FUNCTIONP (function)) | |
| 4180 { | |
| 814 | 4181 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4182 | |
| 1737 | 4183 if (!OPAQUEP (f->instructions)) |
| 4184 /* Lazily munge the instructions into a more efficient form */ | |
| 4185 /* Needed to set max_args */ | |
| 4186 optimize_compiled_function (function); | |
| 4187 | |
| 814 | 4188 if (function_min_args_p) |
| 4189 return make_int (f->min_args); | |
| 4190 else if (f->max_args == MANY) | |
| 4191 return Qnil; | |
| 4192 else | |
| 4193 return make_int (f->max_args); | |
| 428 | 4194 } |
| 4195 else if (CONSP (function)) | |
| 4196 { | |
| 4197 Lisp_Object funcar = XCAR (function); | |
| 4198 | |
| 4199 if (EQ (funcar, Qmacro)) | |
| 4200 { | |
| 4201 function = XCDR (function); | |
| 4202 goto retry; | |
| 4203 } | |
| 4204 else if (EQ (funcar, Qautoload)) | |
| 4205 { | |
| 970 | 4206 /* do_autoload GCPROs both arguments */ |
| 428 | 4207 do_autoload (function, orig_function); |
| 442 | 4208 function = orig_function; |
| 428 | 4209 goto retry; |
| 4210 } | |
| 4211 else if (EQ (funcar, Qlambda)) | |
| 4212 { | |
| 4213 arglist = Fcar (XCDR (function)); | |
| 4214 } | |
| 4215 else | |
| 4216 { | |
| 4217 goto invalid_function; | |
| 4218 } | |
| 4219 } | |
| 4220 else | |
| 4221 { | |
| 4222 invalid_function: | |
| 442 | 4223 return signal_invalid_function_error (orig_function); |
| 428 | 4224 } |
| 4225 | |
| 4226 { | |
| 4227 int argcount = 0; | |
| 4228 | |
| 4229 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4230 { | |
| 4231 if (EQ (arg, Qand_optional)) | |
| 4232 { | |
| 4233 if (function_min_args_p) | |
| 4234 break; | |
| 4235 } | |
| 4236 else if (EQ (arg, Qand_rest)) | |
| 4237 { | |
| 4238 if (function_min_args_p) | |
| 4239 break; | |
| 4240 else | |
| 4241 return Qnil; | |
| 4242 } | |
| 4243 else | |
| 4244 { | |
| 4245 argcount++; | |
| 4246 } | |
| 4247 } | |
| 4248 | |
| 4249 return make_int (argcount); | |
| 4250 } | |
| 4251 } | |
| 4252 | |
| 4253 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4254 Return the minimum number of arguments a function may be called with. |
| 428 | 4255 The function may be any form that can be passed to `funcall', |
| 4256 any special form, or any macro. | |
| 853 | 4257 |
| 4258 To check if a function can be called with a specified number of | |
| 4259 arguments, use `function-allows-args'. | |
| 428 | 4260 */ |
| 4261 (function)) | |
| 4262 { | |
| 4263 return function_argcount (function, 1); | |
| 4264 } | |
| 4265 | |
| 4266 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4267 Return the maximum number of arguments a function may be called with. |
| 428 | 4268 The function may be any form that can be passed to `funcall', |
| 4269 any special form, or any macro. | |
| 4270 If the function takes an arbitrary number of arguments or is | |
| 4271 a built-in special form, nil is returned. | |
| 853 | 4272 |
| 4273 To check if a function can be called with a specified number of | |
| 4274 arguments, use `function-allows-args'. | |
| 428 | 4275 */ |
| 4276 (function)) | |
| 4277 { | |
| 4278 return function_argcount (function, 0); | |
| 4279 } | |
| 4280 | |
| 4281 | |
| 4282 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4283 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4284 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
|
4285 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4286 arguments: (FUNCTION &rest ARGS) |
| 428 | 4287 */ |
| 4288 (int nargs, Lisp_Object *args)) | |
| 4289 { | |
| 4290 /* This function can GC */ | |
| 4291 Lisp_Object fun = args[0]; | |
| 4292 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4293 int numargs; | |
| 4294 int funcall_nargs; | |
| 4295 | |
| 4296 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4297 | |
| 4298 if (numargs == 0) | |
| 4299 /* (apply foo 0 1 '()) */ | |
| 4300 return Ffuncall (nargs - 1, args); | |
| 4301 else if (numargs == 1) | |
| 4302 { | |
| 4303 /* (apply foo 0 1 '(2)) */ | |
| 4304 args [nargs - 1] = XCAR (spread_arg); | |
| 4305 return Ffuncall (nargs, args); | |
| 4306 } | |
| 4307 | |
| 4308 /* -1 for function, -1 for spread arg */ | |
| 4309 numargs = nargs - 2 + numargs; | |
| 4310 /* +1 for function */ | |
| 4311 funcall_nargs = 1 + numargs; | |
| 4312 | |
| 4313 if (SYMBOLP (fun)) | |
| 4314 fun = indirect_function (fun, 0); | |
| 4315 | |
| 4316 if (SUBRP (fun)) | |
| 4317 { | |
| 4318 Lisp_Subr *subr = XSUBR (fun); | |
| 4319 int max_args = subr->max_args; | |
| 4320 | |
| 4321 if (numargs < subr->min_args | |
| 4322 || (max_args >= 0 && max_args < numargs)) | |
| 4323 { | |
| 4324 /* Let funcall get the error */ | |
| 4325 } | |
| 4326 else if (max_args > numargs) | |
| 4327 { | |
| 4328 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4329 by explicitly supplying nil's for optional values */ | |
| 4330 funcall_nargs += (max_args - numargs); | |
| 4331 } | |
| 4332 } | |
| 4333 else if (UNBOUNDP (fun)) | |
| 4334 { | |
| 4335 /* Let funcall get the error */ | |
| 4336 fun = args[0]; | |
| 4337 } | |
| 4338 | |
| 4339 { | |
| 4340 REGISTER int i; | |
| 4341 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4342 struct gcpro gcpro1; | |
| 4343 | |
| 4344 GCPRO1 (*funcall_args); | |
| 4345 gcpro1.nvars = funcall_nargs; | |
| 4346 | |
| 4347 /* Copy in the unspread args */ | |
| 4348 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4349 /* Spread the last arg we got. Its first element goes in | |
| 4350 the slot that it used to occupy, hence this value of I. */ | |
| 4351 for (i = nargs - 1; | |
| 4352 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4353 i++, spread_arg = XCDR (spread_arg)) | |
| 4354 { | |
| 4355 funcall_args [i] = XCAR (spread_arg); | |
| 4356 } | |
| 4357 /* Supply nil for optional args (to subrs) */ | |
| 4358 for (; i < funcall_nargs; i++) | |
| 4359 funcall_args[i] = Qnil; | |
| 4360 | |
| 4361 | |
| 4362 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4363 } | |
| 4364 } | |
| 4365 | |
| 4366 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4367 return the result of evaluation. */ | |
| 4368 | |
| 4369 static Lisp_Object | |
| 4370 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4371 { | |
| 4372 /* This function can GC */ | |
| 442 | 4373 Lisp_Object arglist, body, tail; |
| 428 | 4374 int speccount = specpdl_depth(); |
| 4375 REGISTER int i = 0; | |
| 4376 | |
| 4377 tail = XCDR (fun); | |
| 4378 | |
| 4379 if (!CONSP (tail)) | |
| 4380 goto invalid_function; | |
| 4381 | |
| 4382 arglist = XCAR (tail); | |
| 4383 body = XCDR (tail); | |
| 4384 | |
| 4385 { | |
| 4386 int optional = 0, rest = 0; | |
| 4387 | |
| 442 | 4388 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4389 { |
| 4390 if (!SYMBOLP (symbol)) | |
| 4391 goto invalid_function; | |
| 4392 if (EQ (symbol, Qand_rest)) | |
| 4393 rest = 1; | |
| 4394 else if (EQ (symbol, Qand_optional)) | |
| 4395 optional = 1; | |
| 4396 else if (rest) | |
| 4397 { | |
| 4398 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4399 i = nargs; | |
| 4400 } | |
| 4401 else if (i < nargs) | |
| 4402 specbind (symbol, args[i++]); | |
| 4403 else if (!optional) | |
| 4404 goto wrong_number_of_arguments; | |
| 4405 else | |
| 4406 specbind (symbol, Qnil); | |
| 4407 } | |
| 4408 } | |
| 4409 | |
| 4410 if (i < nargs) | |
| 4411 goto wrong_number_of_arguments; | |
| 4412 | |
| 771 | 4413 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4414 |
| 4415 wrong_number_of_arguments: | |
| 436 | 4416 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4417 |
| 4418 invalid_function: | |
| 436 | 4419 return signal_invalid_function_error (fun); |
| 428 | 4420 } |
| 4421 | |
| 4422 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4423 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4424 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4425 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
|
4426 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4427 -- The number of arguments to #'values is not one, and: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4428 -- Some special form in the call stack is prepared to handle more than |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4429 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4430 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4431 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
|
4432 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4433 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
|
4434 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
|
4435 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
|
4436 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
|
4437 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
|
4438 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
|
4439 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
|
4440 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
|
4441 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4442 The specific multiple values saved and returned depend on how many |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4443 multiple-values special forms in the stack are interested in; for |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4444 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
|
4445 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
|
4446 #'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
|
4447 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
|
4448 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4449 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4450 (#'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
|
4451 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
|
4452 #'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
|
4453 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
|
4454 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
|
4455 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4456 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
|
4457 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
|
4458 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
|
4459 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
|
4460 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4461 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
|
4462 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
|
4463 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
|
4464 on being printed from within GDB. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4465 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4466 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
|
4467 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
|
4468 #'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
|
4469 #'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
|
4470 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
|
4471 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
|
4472 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
|
4473 *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
|
4474 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4475 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4476 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
|
4477 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4478 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4479 "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
|
4480 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
|
4481 used." |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4482 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4483 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
|
4484 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
|
4485 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
|
4486 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
|
4487 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4488 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4489 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
|
4490 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4491 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4492 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4493 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4494 Elemcount i, allocated_count; |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4495 Lisp_Object mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4496 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4497 assert (count != 1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4498 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4499 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
|
4500 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4501 /* 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
|
4502 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4503 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4504 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4505 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4506 if (first_desired >= count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4507 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4508 /* 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
|
4509 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4510 allocated_count = 1; |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4513 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4514 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
|
4515 - first_desired); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4516 } |
|
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 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
|
4519 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4520 contents, allocated_count); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4521 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
|
4522 mv = XMULTIPLE_VALUE (mvobj); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4523 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4524 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4525 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4526 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4527 mv->contents[0] = first_value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4528 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4529 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
|
4530 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4531 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
|
4532 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4533 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4534 return mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4535 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4536 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4537 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4538 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
|
4539 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4540 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
|
4541 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4542 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4543 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4544 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 (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
|
4546 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4547 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
|
4548 make_int (first_desired + allocated_count)); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4551 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
|
4552 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4555 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
|
4556 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4557 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
|
4558 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4559 Elemcount allocated_count = mv->allocated_count; |
|
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 (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4562 (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
|
4563 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4564 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
|
4565 make_int (first_desired + allocated_count)); |
|
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 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
|
4569 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4570 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4571 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 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
|
4573 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4574 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
|
4575 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4576 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4577 Elemcount count = mv->count, index; |
|
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 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4581 printing_unreadable_object ("multiple values"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4583 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4584 if (0 == count) |
|
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 write_c_string (printcharfun, "#<zero-length multiple value>"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 for (index = 0; index < count;) |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4592 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4593 index >= (first_desired + (allocated_count - 1)))) |
|
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 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
|
4596 index); |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4599 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 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
|
4601 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4602 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4603 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4604 ++index; |
|
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 (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4607 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4608 write_c_string (printcharfun, " ;\n"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4609 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4610 } |
|
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 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4614 mark_multiple_value (Lisp_Object obj) |
|
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 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
|
4617 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
|
4618 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4619 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
|
4620 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4621 mark_object (mv->contents[index]); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4624 return Qnil; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 static Bytecount |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4628 size_multiple_value (const void *lheader) |
|
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 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
|
4631 Lisp_Object, contents, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4632 ((struct multiple_value *) lheader)-> |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4633 allocated_count); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4634 } |
|
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 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
|
4637 { 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
|
4638 { 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
|
4639 { 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
|
4640 { 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
|
4641 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4642 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4643 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4644 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4645 DEFINE_DUMPABLE_SIZABLE_LISP_OBJECT ("multiple-value", multiple_value, |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 mark_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4647 print_multiple_value, 0, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4648 0, /* No equal method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4649 0, /* No hash method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4650 multiple_value_description, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4651 size_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4652 struct multiple_value); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4653 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4654 /* 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
|
4655 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
|
4656 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
|
4657 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
|
4658 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 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
|
4660 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4661 int result = specpdl_depth(); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4662 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4663 if (!(upper > first)) |
|
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 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
|
4666 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 if (upper > Vmultiple_values_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4670 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4671 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
|
4672 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4673 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4674 /* 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
|
4675 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
|
4676 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
|
4677 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
|
4678 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4679 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
|
4680 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
|
4681 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4682 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
|
4683 if (0 == first) |
|
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 first = 1; |
|
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 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4689 || first < first_desired_multiple_value) |
|
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 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
|
4692 } |
|
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 if (upper > multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4695 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4696 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
|
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 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4700 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4701 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4702 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4703 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
|
4704 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4705 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4706 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4707 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
|
4708 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4709 Lisp_Object apply_args[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4710 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4711 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4712 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4713 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4714 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4715 CHECK_FUNCTION (args[0]); |
|
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 /* 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
|
4718 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
|
4719 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4720 for (i = 4; i < nargs; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4721 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4722 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4723 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4724 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4725 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4726 Elemcount i, count = XMULTIPLE_VALUE_COUNT (result); |
|
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 for (i = 0; i < count; i++) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4729 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4730 val = multiple_value_aref (result, i); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4731 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4733 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4734 list_offset = XCDR (list_offset); |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4738 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4739 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4740 list_offset = XCDR (list_offset); |
|
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 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4743 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4744 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4745 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4746 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4747 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4748 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4749 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
|
4750 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 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
|
4753 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
|
4754 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4755 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
|
4756 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
|
4757 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
|
4758 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
|
4759 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4760 arguments: (FUNCTION &rest FORMS) |
|
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 (args)) |
|
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 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4765 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4766 struct gcpro gcpro1; |
|
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 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4769 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4770 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
|
4771 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4772 /* 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
|
4773 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
|
4774 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4775 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4776 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4777 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4778 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4779 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4780 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 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
|
4782 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 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
|
4785 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4786 gcpro1.nvars = ++i; |
|
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 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4789 LIST_LOOP_2 (elt, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4790 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4791 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4792 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4793 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4794 } |
|
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 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
|
4797 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4800 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
|
4801 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4802 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
|
4803 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4804 Lisp_Object result = Qnil; |
|
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 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4807 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4808 result = args[3]; |
|
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 if (MULTIPLE_VALUEP (result)) |
|
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 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4816 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
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 for (; first < upper && first < count; ++first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4819 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4820 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4821 assert (!UNBOUNDP (val)); |
|
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 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4824 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4825 } |
|
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 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 else |
|
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 if (first == 0) |
|
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 return Fcons (result, Qnil); |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4837 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4838 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 } |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 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
|
4843 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4844 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
|
4845 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4846 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
|
4847 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4848 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4849 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
|
4850 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
|
4851 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
|
4852 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
|
4853 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
|
4854 `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
|
4855 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4856 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
|
4857 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4858 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4859 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4860 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4861 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4862 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4863 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4864 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4865 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4866 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4867 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4868 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
|
4869 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4870 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4871 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
|
4872 CHECK_NATNUM (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 first = XINT (argv[0]); |
|
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 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 gcpro1.nvars = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4878 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4879 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4880 argv[1] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4881 CHECK_NATNUM (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 upper = XINT (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4884 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4885 /* 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
|
4886 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
|
4887 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
|
4888 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4889 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
|
4890 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4891 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4892 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4893 /* 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
|
4894 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
|
4895 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
|
4896 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
|
4897 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
|
4898 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 gcpro1.nvars = 4; |
|
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 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
|
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-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
|
4906 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
|
4907 `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
|
4908 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4909 arguments: (FIRST &rest BODY) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4910 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4911 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4912 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4913 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4914 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4915 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4916 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4917 val = Feval (XCAR (args)); |
|
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 GCPRO1 (val); |
|
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 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4922 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4924 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4925 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4926 RETURN_UNGCPRO (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4927 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4928 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4929 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4930 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4931 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4932 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4933 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 (int nargs, Lisp_Object *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 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4937 int counting = 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 /* 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
|
4940 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
|
4941 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4942 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4943 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4944 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4945 /* 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
|
4946 #'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
|
4947 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
|
4948 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4949 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
|
4950 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4951 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4953 for (; counting < nargs; ++counting) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4954 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4955 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4956 counting < multiple_value_current_limit) |
|
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 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
|
4959 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4960 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4961 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4962 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4964 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4965 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
|
4966 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
|
4967 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4968 (list)) |
|
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 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4971 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4973 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4974 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 /* 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
|
4976 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
|
4977 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4978 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4979 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4980 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4981 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
|
4982 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4983 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4984 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 list = Fcdr_safe (list); |
|
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 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4988 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
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 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4991 counting < multiple_value_current_limit) |
|
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 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4995 ++counting; |
|
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 } |
|
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 return result; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5002 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5003 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
|
5004 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5005 Lisp_Object argv[2]; |
|
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 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5008 argv[1] = second; |
|
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 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5011 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5012 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5013 |
| 428 | 5014 /************************************************************************/ |
| 5015 /* Run hook variables in various ways. */ | |
| 5016 /************************************************************************/ | |
| 5017 | |
| 5018 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5019 Run each hook in HOOKS. Major mode functions use this. | |
| 5020 Each argument should be a symbol, a hook variable. | |
| 5021 These symbols are processed in the order specified. | |
| 5022 If a hook symbol has a non-nil value, that value may be a function | |
| 5023 or a list of functions to be called to run the hook. | |
| 5024 If the value is a function, it is called with no arguments. | |
| 5025 If it is a list, the elements are called, in order, with no arguments. | |
| 5026 | |
| 5027 To make a hook variable buffer-local, use `make-local-hook', | |
| 5028 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5029 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5030 arguments: (FIRST &rest REST) |
| 428 | 5031 */ |
| 5032 (int nargs, Lisp_Object *args)) | |
| 5033 { | |
| 5034 REGISTER int i; | |
| 5035 | |
| 5036 for (i = 0; i < nargs; i++) | |
| 5037 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5038 | |
| 5039 return Qnil; | |
| 5040 } | |
| 5041 | |
| 5042 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5043 Run HOOK with the specified arguments ARGS. | |
| 5044 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5045 value, that value may be a function or a list of functions to be | |
| 5046 called to run the hook. If the value is a function, it is called with | |
| 5047 the given arguments and its return value is returned. If it is a list | |
| 5048 of functions, those functions are called, in order, | |
| 5049 with the given arguments ARGS. | |
| 444 | 5050 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5051 as that may change. |
| 5052 | |
| 5053 To make a hook variable buffer-local, use `make-local-hook', | |
| 5054 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5055 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5056 arguments: (HOOK &rest ARGS) |
| 428 | 5057 */ |
| 5058 (int nargs, Lisp_Object *args)) | |
| 5059 { | |
| 5060 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5061 } | |
| 5062 | |
| 5063 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5064 Run HOOK with the specified arguments ARGS. | |
| 5065 HOOK should be a symbol, a hook variable. Its value should | |
| 5066 be a list of functions. We call those functions, one by one, | |
| 5067 passing arguments ARGS to each of them, until one of them | |
| 5068 returns a non-nil value. Then we return that value. | |
| 5069 If all the functions return nil, we return nil. | |
| 5070 | |
| 5071 To make a hook variable buffer-local, use `make-local-hook', | |
| 5072 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5073 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5074 arguments: (HOOK &rest ARGS) |
| 428 | 5075 */ |
| 5076 (int nargs, Lisp_Object *args)) | |
| 5077 { | |
| 5078 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5079 } | |
| 5080 | |
| 5081 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5082 Run HOOK with the specified arguments ARGS. | |
| 5083 HOOK should be a symbol, a hook variable. Its value should | |
| 5084 be a list of functions. We call those functions, one by one, | |
| 5085 passing arguments ARGS to each of them, until one of them | |
| 5086 returns nil. Then we return nil. | |
| 5087 If all the functions return non-nil, we return non-nil. | |
| 5088 | |
| 5089 To make a hook variable buffer-local, use `make-local-hook', | |
| 5090 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5091 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5092 arguments: (HOOK &rest ARGS) |
| 428 | 5093 */ |
| 5094 (int nargs, Lisp_Object *args)) | |
| 5095 { | |
| 5096 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5097 } | |
| 5098 | |
| 5099 /* ARGS[0] should be a hook symbol. | |
| 5100 Call each of the functions in the hook value, passing each of them | |
| 5101 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5102 COND specifies a condition to test after each call | |
| 5103 to decide whether to stop. | |
| 5104 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5105 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5106 | |
| 5107 Lisp_Object | |
| 5108 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5109 enum run_hooks_condition cond) | |
| 5110 { | |
| 5111 Lisp_Object sym, val, ret; | |
| 5112 | |
| 5113 if (!initialized || preparing_for_armageddon) | |
| 5114 /* We need to bail out of here pronto. */ | |
| 5115 return Qnil; | |
| 5116 | |
| 3092 | 5117 #ifndef NEW_GC |
| 428 | 5118 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5119 will also be true unless something is really hosed. */ | |
| 5120 assert (!gc_in_progress); | |
| 3092 | 5121 #endif /* not NEW_GC */ |
| 428 | 5122 |
| 5123 sym = args[0]; | |
| 771 | 5124 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5125 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5126 | |
| 5127 if (UNBOUNDP (val) || NILP (val)) | |
| 5128 return ret; | |
| 5129 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5130 { | |
| 5131 args[0] = val; | |
| 5132 return Ffuncall (nargs, args); | |
| 5133 } | |
| 5134 else | |
| 5135 { | |
| 5136 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5137 Lisp_Object globals = Qnil; | |
| 5138 GCPRO3 (sym, val, globals); | |
| 5139 | |
| 5140 for (; | |
| 5141 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5142 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5143 : !NILP (ret))); | |
| 5144 val = XCDR (val)) | |
| 5145 { | |
| 5146 if (EQ (XCAR (val), Qt)) | |
| 5147 { | |
| 5148 /* t indicates this hook has a local binding; | |
| 5149 it means to run the global binding too. */ | |
| 5150 globals = Fdefault_value (sym); | |
| 5151 | |
| 5152 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5153 ! NILP (globals)) | |
| 5154 { | |
| 5155 args[0] = globals; | |
| 5156 ret = Ffuncall (nargs, args); | |
| 5157 } | |
| 5158 else | |
| 5159 { | |
| 5160 for (; | |
| 5161 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5162 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5163 ? NILP (ret) | |
| 5164 : !NILP (ret))); | |
| 5165 globals = XCDR (globals)) | |
| 5166 { | |
| 5167 args[0] = XCAR (globals); | |
| 5168 /* In a global value, t should not occur. If it does, we | |
| 5169 must ignore it to avoid an endless loop. */ | |
| 5170 if (!EQ (args[0], Qt)) | |
| 5171 ret = Ffuncall (nargs, args); | |
| 5172 } | |
| 5173 } | |
| 5174 } | |
| 5175 else | |
| 5176 { | |
| 5177 args[0] = XCAR (val); | |
| 5178 ret = Ffuncall (nargs, args); | |
| 5179 } | |
| 5180 } | |
| 5181 | |
| 5182 UNGCPRO; | |
| 5183 return ret; | |
| 5184 } | |
| 5185 } | |
| 5186 | |
| 5187 Lisp_Object | |
| 5188 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5189 enum run_hooks_condition cond) | |
| 5190 { | |
| 5191 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5192 } | |
| 5193 | |
| 5194 #if 0 | |
| 5195 | |
| 853 | 5196 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5197 |
| 5198 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5199 present value of that symbol. | |
| 5200 Call each element of FUNLIST, | |
| 5201 passing each of them the rest of ARGS. | |
| 5202 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5203 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5204 | |
| 5205 Lisp_Object | |
| 5206 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5207 { | |
| 853 | 5208 omitted; |
| 428 | 5209 } |
| 5210 | |
| 5211 #endif /* 0 */ | |
| 5212 | |
| 5213 void | |
| 5214 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5215 { | |
| 5216 /* This function can GC */ | |
| 5217 struct gcpro gcpro1; | |
| 5218 int i; | |
| 5219 va_list vargs; | |
| 5220 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5221 | |
| 5222 va_start (vargs, nargs); | |
| 5223 funcall_args[0] = hook_var; | |
| 5224 for (i = 0; i < nargs; i++) | |
| 5225 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5226 va_end (vargs); | |
| 5227 | |
| 5228 GCPRO1 (*funcall_args); | |
| 5229 gcpro1.nvars = nargs + 1; | |
| 5230 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5231 UNGCPRO; | |
| 5232 } | |
| 5233 | |
| 5234 void | |
| 5235 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5236 int nargs, ...) | |
| 5237 { | |
| 5238 /* This function can GC */ | |
| 5239 struct gcpro gcpro1; | |
| 5240 int i; | |
| 5241 va_list vargs; | |
| 5242 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5243 | |
| 5244 va_start (vargs, nargs); | |
| 5245 funcall_args[0] = hook_var; | |
| 5246 for (i = 0; i < nargs; i++) | |
| 5247 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5248 va_end (vargs); | |
| 5249 | |
| 5250 GCPRO1 (*funcall_args); | |
| 5251 gcpro1.nvars = nargs + 1; | |
| 5252 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5253 RUN_HOOKS_TO_COMPLETION); | |
| 5254 UNGCPRO; | |
| 5255 } | |
| 5256 | |
| 5257 Lisp_Object | |
| 5258 run_hook (Lisp_Object hook) | |
| 5259 { | |
| 853 | 5260 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5261 } |
| 5262 | |
| 5263 | |
| 5264 /************************************************************************/ | |
| 5265 /* Front-ends to eval, funcall, apply */ | |
| 5266 /************************************************************************/ | |
| 5267 | |
| 5268 /* Apply fn to arg */ | |
| 5269 Lisp_Object | |
| 5270 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5271 { | |
| 5272 /* This function can GC */ | |
| 5273 struct gcpro gcpro1; | |
| 5274 Lisp_Object args[2]; | |
| 5275 | |
| 5276 if (NILP (arg)) | |
| 5277 return Ffuncall (1, &fn); | |
| 5278 GCPRO1 (args[0]); | |
| 5279 gcpro1.nvars = 2; | |
| 5280 args[0] = fn; | |
| 5281 args[1] = arg; | |
| 5282 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5283 } | |
| 5284 | |
| 5285 /* Call function fn on no arguments */ | |
| 5286 Lisp_Object | |
| 5287 call0 (Lisp_Object fn) | |
| 5288 { | |
| 5289 /* This function can GC */ | |
| 5290 struct gcpro gcpro1; | |
| 5291 | |
| 5292 GCPRO1 (fn); | |
| 5293 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5294 } | |
| 5295 | |
| 5296 /* Call function fn with argument arg0 */ | |
| 5297 Lisp_Object | |
| 5298 call1 (Lisp_Object fn, | |
| 5299 Lisp_Object arg0) | |
| 5300 { | |
| 5301 /* This function can GC */ | |
| 5302 struct gcpro gcpro1; | |
| 5303 Lisp_Object args[2]; | |
| 5304 args[0] = fn; | |
| 5305 args[1] = arg0; | |
| 5306 GCPRO1 (args[0]); | |
| 5307 gcpro1.nvars = 2; | |
| 5308 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5309 } | |
| 5310 | |
| 5311 /* Call function fn with arguments arg0, arg1 */ | |
| 5312 Lisp_Object | |
| 5313 call2 (Lisp_Object fn, | |
| 5314 Lisp_Object arg0, Lisp_Object arg1) | |
| 5315 { | |
| 5316 /* This function can GC */ | |
| 5317 struct gcpro gcpro1; | |
| 5318 Lisp_Object args[3]; | |
| 5319 args[0] = fn; | |
| 5320 args[1] = arg0; | |
| 5321 args[2] = arg1; | |
| 5322 GCPRO1 (args[0]); | |
| 5323 gcpro1.nvars = 3; | |
| 5324 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5325 } | |
| 5326 | |
| 5327 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5328 Lisp_Object | |
| 5329 call3 (Lisp_Object fn, | |
| 5330 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5331 { | |
| 5332 /* This function can GC */ | |
| 5333 struct gcpro gcpro1; | |
| 5334 Lisp_Object args[4]; | |
| 5335 args[0] = fn; | |
| 5336 args[1] = arg0; | |
| 5337 args[2] = arg1; | |
| 5338 args[3] = arg2; | |
| 5339 GCPRO1 (args[0]); | |
| 5340 gcpro1.nvars = 4; | |
| 5341 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5342 } | |
| 5343 | |
| 5344 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5345 Lisp_Object | |
| 5346 call4 (Lisp_Object fn, | |
| 5347 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5348 Lisp_Object arg3) | |
| 5349 { | |
| 5350 /* This function can GC */ | |
| 5351 struct gcpro gcpro1; | |
| 5352 Lisp_Object args[5]; | |
| 5353 args[0] = fn; | |
| 5354 args[1] = arg0; | |
| 5355 args[2] = arg1; | |
| 5356 args[3] = arg2; | |
| 5357 args[4] = arg3; | |
| 5358 GCPRO1 (args[0]); | |
| 5359 gcpro1.nvars = 5; | |
| 5360 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5361 } | |
| 5362 | |
| 5363 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5364 Lisp_Object | |
| 5365 call5 (Lisp_Object fn, | |
| 5366 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5367 Lisp_Object arg3, Lisp_Object arg4) | |
| 5368 { | |
| 5369 /* This function can GC */ | |
| 5370 struct gcpro gcpro1; | |
| 5371 Lisp_Object args[6]; | |
| 5372 args[0] = fn; | |
| 5373 args[1] = arg0; | |
| 5374 args[2] = arg1; | |
| 5375 args[3] = arg2; | |
| 5376 args[4] = arg3; | |
| 5377 args[5] = arg4; | |
| 5378 GCPRO1 (args[0]); | |
| 5379 gcpro1.nvars = 6; | |
| 5380 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5381 } | |
| 5382 | |
| 5383 Lisp_Object | |
| 5384 call6 (Lisp_Object fn, | |
| 5385 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5386 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5387 { | |
| 5388 /* This function can GC */ | |
| 5389 struct gcpro gcpro1; | |
| 5390 Lisp_Object args[7]; | |
| 5391 args[0] = fn; | |
| 5392 args[1] = arg0; | |
| 5393 args[2] = arg1; | |
| 5394 args[3] = arg2; | |
| 5395 args[4] = arg3; | |
| 5396 args[5] = arg4; | |
| 5397 args[6] = arg5; | |
| 5398 GCPRO1 (args[0]); | |
| 5399 gcpro1.nvars = 7; | |
| 5400 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5401 } | |
| 5402 | |
| 5403 Lisp_Object | |
| 5404 call7 (Lisp_Object fn, | |
| 5405 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5406 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5407 Lisp_Object arg6) | |
| 5408 { | |
| 5409 /* This function can GC */ | |
| 5410 struct gcpro gcpro1; | |
| 5411 Lisp_Object args[8]; | |
| 5412 args[0] = fn; | |
| 5413 args[1] = arg0; | |
| 5414 args[2] = arg1; | |
| 5415 args[3] = arg2; | |
| 5416 args[4] = arg3; | |
| 5417 args[5] = arg4; | |
| 5418 args[6] = arg5; | |
| 5419 args[7] = arg6; | |
| 5420 GCPRO1 (args[0]); | |
| 5421 gcpro1.nvars = 8; | |
| 5422 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5423 } | |
| 5424 | |
| 5425 Lisp_Object | |
| 5426 call8 (Lisp_Object fn, | |
| 5427 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5428 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5429 Lisp_Object arg6, Lisp_Object arg7) | |
| 5430 { | |
| 5431 /* This function can GC */ | |
| 5432 struct gcpro gcpro1; | |
| 5433 Lisp_Object args[9]; | |
| 5434 args[0] = fn; | |
| 5435 args[1] = arg0; | |
| 5436 args[2] = arg1; | |
| 5437 args[3] = arg2; | |
| 5438 args[4] = arg3; | |
| 5439 args[5] = arg4; | |
| 5440 args[6] = arg5; | |
| 5441 args[7] = arg6; | |
| 5442 args[8] = arg7; | |
| 5443 GCPRO1 (args[0]); | |
| 5444 gcpro1.nvars = 9; | |
| 5445 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5446 } | |
| 5447 | |
| 5448 Lisp_Object | |
| 5449 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5450 { | |
| 5451 if (current_buffer == buf) | |
| 5452 return call0 (fn); | |
| 5453 else | |
| 5454 { | |
| 5455 Lisp_Object val; | |
| 5456 int speccount = specpdl_depth(); | |
| 5457 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5458 set_buffer_internal (buf); | |
| 5459 val = call0 (fn); | |
| 771 | 5460 unbind_to (speccount); |
| 428 | 5461 return val; |
| 5462 } | |
| 5463 } | |
| 5464 | |
| 5465 Lisp_Object | |
| 5466 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5467 Lisp_Object arg0) | |
| 5468 { | |
| 5469 if (current_buffer == buf) | |
| 5470 return call1 (fn, arg0); | |
| 5471 else | |
| 5472 { | |
| 5473 Lisp_Object val; | |
| 5474 int speccount = specpdl_depth(); | |
| 5475 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5476 set_buffer_internal (buf); | |
| 5477 val = call1 (fn, arg0); | |
| 771 | 5478 unbind_to (speccount); |
| 428 | 5479 return val; |
| 5480 } | |
| 5481 } | |
| 5482 | |
| 5483 Lisp_Object | |
| 5484 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5485 Lisp_Object arg0, Lisp_Object arg1) | |
| 5486 { | |
| 5487 if (current_buffer == buf) | |
| 5488 return call2 (fn, arg0, arg1); | |
| 5489 else | |
| 5490 { | |
| 5491 Lisp_Object val; | |
| 5492 int speccount = specpdl_depth(); | |
| 5493 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5494 set_buffer_internal (buf); | |
| 5495 val = call2 (fn, arg0, arg1); | |
| 771 | 5496 unbind_to (speccount); |
| 428 | 5497 return val; |
| 5498 } | |
| 5499 } | |
| 5500 | |
| 5501 Lisp_Object | |
| 5502 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5503 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5504 { | |
| 5505 if (current_buffer == buf) | |
| 5506 return call3 (fn, arg0, arg1, arg2); | |
| 5507 else | |
| 5508 { | |
| 5509 Lisp_Object val; | |
| 5510 int speccount = specpdl_depth(); | |
| 5511 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5512 set_buffer_internal (buf); | |
| 5513 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5514 unbind_to (speccount); |
| 428 | 5515 return val; |
| 5516 } | |
| 5517 } | |
| 5518 | |
| 5519 Lisp_Object | |
| 5520 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5521 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5522 Lisp_Object arg3) | |
| 5523 { | |
| 5524 if (current_buffer == buf) | |
| 5525 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5526 else | |
| 5527 { | |
| 5528 Lisp_Object val; | |
| 5529 int speccount = specpdl_depth(); | |
| 5530 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5531 set_buffer_internal (buf); | |
| 5532 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5533 unbind_to (speccount); |
| 428 | 5534 return val; |
| 5535 } | |
| 5536 } | |
| 5537 | |
| 5538 Lisp_Object | |
| 5539 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5540 { | |
| 5541 if (current_buffer == buf) | |
| 5542 return Feval (form); | |
| 5543 else | |
| 5544 { | |
| 5545 Lisp_Object val; | |
| 5546 int speccount = specpdl_depth(); | |
| 5547 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5548 set_buffer_internal (buf); | |
| 5549 val = Feval (form); | |
| 771 | 5550 unbind_to (speccount); |
| 428 | 5551 return val; |
| 5552 } | |
| 5553 } | |
| 5554 | |
| 5555 | |
| 5556 /************************************************************************/ | |
| 5557 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5558 /************************************************************************/ | |
| 5559 | |
| 853 | 5560 int |
| 5561 get_inhibit_flags (void) | |
| 5562 { | |
| 5563 return inhibit_flags; | |
| 5564 } | |
| 5565 | |
| 5566 void | |
| 2286 | 5567 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5568 { |
| 5569 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5570 { | |
| 5571 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5572 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5573 invalid_change | |
| 5574 ("Modification of this buffer not currently permitted", obj); | |
| 5575 } | |
| 5576 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5577 { | |
| 5578 if (what == OPERATION_DELETE_OBJECT | |
| 5579 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5580 || CONSOLEP (obj)) | |
| 5581 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5582 invalid_change | |
| 5583 ("Deletion of this object not currently permitted", obj); | |
| 5584 } | |
| 5585 } | |
| 5586 | |
| 5587 void | |
| 5588 note_object_created (Lisp_Object obj) | |
| 5589 { | |
| 5590 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5591 { | |
| 5592 if (BUFFERP (obj)) | |
| 5593 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5594 } | |
| 5595 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5596 { | |
| 5597 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5598 || CONSOLEP (obj)) | |
| 5599 Vdeletable_permanent_display_objects = | |
| 5600 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5601 } | |
| 5602 } | |
| 5603 | |
| 5604 void | |
| 5605 note_object_deleted (Lisp_Object obj) | |
| 5606 { | |
| 5607 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5608 { | |
| 5609 if (BUFFERP (obj)) | |
| 5610 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5611 } | |
| 5612 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5613 { | |
| 5614 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5615 || CONSOLEP (obj)) | |
| 5616 Vdeletable_permanent_display_objects = | |
| 5617 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5618 } | |
| 5619 } | |
| 5620 | |
| 5621 struct call_trapping_problems | |
| 5622 { | |
| 5623 Lisp_Object catchtag; | |
| 5624 Lisp_Object error_conditions; | |
| 5625 Lisp_Object data; | |
| 5626 Lisp_Object backtrace; | |
| 5627 Lisp_Object warning_class; | |
| 5628 | |
| 867 | 5629 const CIbyte *warning_string; |
| 853 | 5630 Lisp_Object (*fun) (void *); |
| 5631 void *arg; | |
| 5632 }; | |
| 428 | 5633 |
| 2532 | 5634 static Lisp_Object |
| 5635 maybe_get_trapping_problems_backtrace (void) | |
| 5636 { | |
| 5637 Lisp_Object backtrace; | |
| 853 | 5638 |
| 1123 | 5639 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5640 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5641 { |
| 1333 | 5642 struct gcpro gcpro1; |
| 5643 Lisp_Object lstream = Qnil; | |
| 5644 int speccount = specpdl_depth (); | |
| 5645 | |
| 853 | 5646 /* We're no longer protected against errors or quit here, so at |
| 5647 least let's temporarily inhibit quit. We definitely do not | |
| 5648 want to inhibit quit during the calling of the function | |
| 5649 itself!!!!!!!!!!! */ | |
| 5650 | |
| 5651 specbind (Qinhibit_quit, Qt); | |
| 5652 | |
| 5653 GCPRO1 (lstream); | |
| 5654 lstream = make_resizing_buffer_output_stream (); | |
| 5655 Fbacktrace (lstream, Qt); | |
| 5656 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5657 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5658 Lstream_delete (XLSTREAM (lstream)); |
| 5659 UNGCPRO; | |
| 5660 | |
| 5661 unbind_to (speccount); | |
| 428 | 5662 } |
| 853 | 5663 else |
| 2532 | 5664 backtrace = Qnil; |
| 5665 | |
| 5666 return backtrace; | |
| 5667 } | |
| 5668 | |
| 5669 static DECLARE_DOESNT_RETURN_TYPE | |
| 5670 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5671 | |
| 5672 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5673 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5674 Lisp_Object opaque) | |
| 5675 { | |
| 5676 struct call_trapping_problems *p = | |
| 5677 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5678 | |
| 5679 if (!EQ (error_conditions, Qquit)) | |
| 5680 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5681 else | |
| 853 | 5682 p->backtrace = Qnil; |
| 5683 p->error_conditions = error_conditions; | |
| 5684 p->data = data; | |
| 5685 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5686 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5687 RETURN_NOT_REACHED (Qnil); |
| 853 | 5688 } |
| 5689 | |
| 5690 static Lisp_Object | |
| 5691 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5692 { | |
| 5693 struct call_trapping_problems *p = | |
| 5694 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5695 | |
| 5696 return (p->fun) (p->arg); | |
| 428 | 5697 } |
| 5698 | |
| 5699 static Lisp_Object | |
| 853 | 5700 call_trapping_problems_1 (Lisp_Object opaque) |
| 5701 { | |
| 5702 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5703 call_trapping_problems_2, opaque); | |
| 5704 } | |
| 5705 | |
| 1333 | 5706 static void |
| 5707 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5708 const CIbyte *warning_string, | |
| 5709 struct call_trapping_problems_result *p) | |
| 5710 { | |
| 5711 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5712 { | |
| 5713 int depth = specpdl_depth (); | |
| 5714 | |
| 5715 /* We're no longer protected against errors or quit here, so at | |
| 5716 least let's temporarily inhibit quit. */ | |
| 5717 specbind (Qinhibit_quit, Qt); | |
| 5718 | |
| 5719 if (p->caught_throw) | |
| 5720 { | |
| 5721 Lisp_Object errstr = | |
| 5722 emacs_sprintf_string_lisp | |
| 2532 | 5723 ("%s: Attempt to throw outside of function:" |
| 5724 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5725 Qnil, 4, |
| 1333 | 5726 build_msg_string (warning_string ? warning_string : "error"), |
| 2532 | 5727 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5728 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5729 } | |
| 2421 | 5730 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5731 { |
| 5732 Lisp_Object errstr; | |
| 5733 /* #### This should call | |
| 5734 (with-output-to-string (display-error (cons error_conditions | |
| 5735 data)) | |
| 5736 but that stuff is all in Lisp currently. */ | |
| 5737 errstr = | |
| 5738 emacs_sprintf_string_lisp | |
| 5739 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5740 Qnil, 4, | |
| 5741 build_msg_string (warning_string ? warning_string : "error"), | |
| 5742 p->error_conditions, p->data, p->backtrace); | |
| 5743 | |
| 5744 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5745 errstr); | |
| 5746 } | |
| 5747 | |
| 5748 unbind_to (depth); | |
| 5749 } | |
| 5750 } | |
| 5751 | |
| 1318 | 5752 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5753 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5754 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5755 use call_trapping_problems() for that. Turn the flags off with | |
| 5756 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5757 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5758 various other flags). */ | |
| 5759 | |
| 5760 int | |
| 5761 set_trapping_problems_flags (int flags) | |
| 5762 { | |
| 5763 int new_inhibit_flags; | |
| 5764 | |
| 5765 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5766 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5767 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5768 | INHIBIT_ENTERING_DEBUGGER | |
| 5769 | INHIBIT_WARNING_ISSUE | |
| 5770 | INHIBIT_GC; | |
| 5771 | |
| 5772 new_inhibit_flags = inhibit_flags | flags; | |
| 5773 if (new_inhibit_flags != inhibit_flags) | |
| 5774 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5775 | |
| 5776 if (flags & INHIBIT_QUIT) | |
| 5777 specbind (Qinhibit_quit, Qt); | |
| 5778 | |
| 5779 if (flags & UNINHIBIT_QUIT) | |
| 5780 begin_do_check_for_quit (); | |
| 5781 | |
| 5782 if (flags & INHIBIT_GC) | |
| 5783 begin_gc_forbidden (); | |
| 5784 | |
| 5785 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5786 inner one creates some buffers/etc., should the outer one be able | |
| 5787 to delete them? I think so, but it means we need to combine rather | |
| 5788 than just reset the value. */ | |
| 5789 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5790 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5791 | |
| 5792 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5793 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5794 | |
| 5795 return flags; | |
| 5796 } | |
| 5797 | |
| 853 | 5798 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5799 can be trapped or inhibited, according to FLAGS. | |
| 5800 | |
| 5801 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5802 the error is caught and a warning is issued, specifying the | |
| 5803 specific error that occurred and a backtrace. In that case, | |
| 5804 WARNING_STRING should be given, and will be printed at the | |
| 5805 beginning of the error to indicate where the error occurred. | |
| 5806 | |
| 5807 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5808 `throw' out of the function being called are trapped, and a warning | |
| 5809 issued. (Again, WARNING_STRING should be given.) | |
| 5810 | |
| 2367 | 5811 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5812 this applies to recursive invocations of call_trapping_problems, too. |
| 5813 | |
| 1333 | 5814 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5815 but values useful for generating a warning are still computed (in | |
| 5816 particular, the backtrace), so that the calling function can issue | |
| 5817 a warning. | |
| 5818 | |
| 853 | 5819 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5820 issued, but at level `debug', which normally is below the minimum | |
| 5821 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5822 be ignored entirely. The user can change this variable, however, | |
| 5823 to see the warnings.) | |
| 5824 | |
| 5825 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5826 given, you are *guaranteed* that there will be no non-local exits | |
| 5827 out of this function. | |
| 5828 | |
| 5829 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5830 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5831 automatically caught as well, and treated as an error; you can | |
| 5832 check for this using EQ (problems->error_conditions, Qquit). | |
| 5833 | |
| 5834 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5835 turned on. (It will abort the code being called, but will still be | |
| 5836 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5837 given.) This is useful when QUIT checking has been turned off by a | |
| 5838 higher-level caller. | |
| 5839 | |
| 5840 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5841 This is useful for Lisp called within redisplay, for example. |
| 853 | 5842 |
| 5843 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5844 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5845 or consoles that were already in existence at the time this function | |
| 5846 was called. (However, it's perfectly legal for code to create a new | |
| 5847 buffer and then delete it.) | |
| 5848 | |
| 5849 #### It might be useful to have a flag that inhibits deletion of a | |
| 5850 specific permanent display object and everything it's attached to | |
| 5851 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5852 attached to. | |
| 5853 | |
| 5854 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5855 code is not allowed to modify the text of any buffers that were | |
| 5856 already in existence at the time this function was called. | |
| 5857 (However, it's perfectly legal for code to create a new buffer and | |
| 5858 then modify its text.) | |
| 5859 | |
| 5860 [These last two flags are implemented using global variables | |
| 5861 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5862 which keep track of a list of all buffers or permanent display | |
| 5863 objects created since the last time one of these flags was set. | |
| 5864 The code that deletes buffers, etc. and modifies buffers checks | |
| 5865 | |
| 5866 (1) if the corresponding flag is set (through the global variable | |
| 5867 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5868 | |
| 5869 (2) if the object to be modified or deleted is not in the | |
| 5870 appropriate list. | |
| 5871 | |
| 5872 If so, it signals an error. | |
| 5873 | |
| 5874 Recursive calls to call_trapping_problems() are allowed. In | |
| 5875 the case of the two flags mentioned above, the current values | |
| 5876 of the global variables are stored in an unwind-protect, and | |
| 5877 they're reset to nil.] | |
| 5878 | |
| 5879 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5880 be entered if an error occurs inside the Lisp code being called, | |
| 5881 even when the user has requested an error. In such case, a warning | |
| 5882 is issued stating that access to the debugger is denied, unless | |
| 5883 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5884 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5885 in such cases either the display is in an inconsistent state or | |
| 5886 doing window operations is explicitly forbidden by the OS, and the | |
| 5887 debugger would causes visual changes on the screen and might create | |
| 5888 another frame. | |
| 5889 | |
| 5890 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5891 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5892 specifiers relating to display, other variables relating to | |
| 5893 display, splitting, deleting, or resizing windows or frames, | |
| 5894 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5895 allowed. This is for things called absolutely in the middle of | |
| 5896 redisplay, which expects things to be *exactly* the same after the | |
| 5897 call as before. This isn't completely implemented and needs to be | |
| 5898 thought out some more to determine exactly what its semantics are. | |
| 5899 For the moment, turning on this flag also turns on | |
| 5900 | |
| 5901 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5902 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5903 INHIBIT_ENTERING_DEBUGGER | |
| 5904 INHIBIT_WARNING_ISSUE | |
| 5905 INHIBIT_GC | |
| 5906 | |
| 5907 #### The following five flags are defined, but unimplemented: | |
| 5908 | |
| 5909 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5910 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5911 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5912 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5913 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5914 | |
| 5915 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5916 call_with_suspended_errors() was invoked. This exists only for | |
| 5917 debugging purposes -- often we want to break when a signal happens, | |
| 5918 but ignore signals from call_with_suspended_errors(), because they | |
| 5919 occur often and for legitimate reasons. | |
| 5920 | |
| 5921 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5922 which exact information about any occurring problems (either an | |
| 5923 error or an attempted throw past this boundary). | |
| 5924 | |
| 5925 If a problem occurred and aborted operation (error, quit, or | |
| 5926 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5927 from the call to (*fun) (arg) is returned. */ | |
| 5928 | |
| 5929 Lisp_Object | |
| 5930 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5931 const CIbyte *warning_string, |
| 853 | 5932 int flags, |
| 5933 struct call_trapping_problems_result *problem, | |
| 5934 Lisp_Object (*fun) (void *), | |
| 5935 void *arg) | |
| 5936 { | |
| 1318 | 5937 int speccount = specpdl_depth (); |
| 853 | 5938 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 5939 struct call_trapping_problems package; | |
| 1333 | 5940 struct call_trapping_problems_result real_problem; |
| 2532 | 5941 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 5942 int thrown = 0; |
| 5943 | |
| 5944 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 5945 assert (!NILP (warning_class)); | |
| 5946 | |
| 5947 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 5948 | |
| 5949 package.warning_class = warning_class; | |
| 5950 package.warning_string = warning_string; | |
| 5951 package.fun = fun; | |
| 5952 package.arg = arg; | |
| 5953 package.catchtag = | |
| 5954 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 5955 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 5956 Qnil; | |
| 5957 package.error_conditions = Qnil; | |
| 5958 package.data = Qnil; | |
| 5959 package.backtrace = Qnil; | |
| 5960 | |
| 1318 | 5961 flags = set_trapping_problems_flags (flags); |
| 853 | 5962 |
| 5963 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 5964 opaque = make_opaque_ptr (&package); | |
| 5965 else | |
| 5966 opaque = Qnil; | |
| 5967 | |
| 5968 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 5969 package.backtrace, opaque); | |
| 5970 | |
| 5971 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 5972 /* We need a catch so that our condition-handler can throw back here | |
| 5973 after printing the warning. (We print the warning in the stack | |
| 5974 context of the error, so we can get a backtrace.) */ | |
| 5975 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 5976 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5977 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 5978 /* We skip over the first wrapper, which traps errors. */ | |
| 5979 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 5980 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5981 else |
| 5982 /* Nothing special. */ | |
| 5983 tem = (fun) (arg); | |
| 5984 | |
| 1333 | 5985 if (!problem) |
| 5986 problem = &real_problem; | |
| 5987 | |
| 5988 if (!thrown) | |
| 853 | 5989 { |
| 1333 | 5990 problem->caught_error = 0; |
| 5991 problem->caught_throw = 0; | |
| 5992 problem->error_conditions = Qnil; | |
| 5993 problem->data = Qnil; | |
| 5994 problem->backtrace = Qnil; | |
| 5995 problem->thrown_tag = Qnil; | |
| 5996 problem->thrown_value = Qnil; | |
| 853 | 5997 } |
| 1333 | 5998 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 5999 { |
| 1333 | 6000 problem->caught_error = 1; |
| 6001 problem->caught_throw = 0; | |
| 6002 problem->error_conditions = package.error_conditions; | |
| 6003 problem->data = package.data; | |
| 6004 problem->backtrace = package.backtrace; | |
| 6005 problem->thrown_tag = Qnil; | |
| 6006 problem->thrown_value = Qnil; | |
| 853 | 6007 } |
| 1333 | 6008 else |
| 6009 { | |
| 6010 problem->caught_error = 0; | |
| 6011 problem->caught_throw = 1; | |
| 6012 problem->error_conditions = Qnil; | |
| 6013 problem->data = Qnil; | |
| 2532 | 6014 problem->backtrace = thrown_backtrace; |
| 1333 | 6015 problem->thrown_tag = thrown_tag; |
| 6016 problem->thrown_value = tem; | |
| 6017 } | |
| 6018 | |
| 6019 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6020 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6021 problem); | |
| 853 | 6022 |
| 6023 if (!NILP (package.catchtag) && | |
| 6024 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6025 free_opaque_ptr (package.catchtag); | |
| 6026 | |
| 6027 if (!NILP (opaque)) | |
| 6028 free_opaque_ptr (opaque); | |
| 6029 | |
| 6030 unbind_to (speccount); | |
| 6031 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6032 } | |
| 6033 | |
| 6034 struct va_call_trapping_problems | |
| 6035 { | |
| 6036 lisp_fn_t fun; | |
| 6037 int nargs; | |
| 6038 Lisp_Object *args; | |
| 6039 }; | |
| 6040 | |
| 6041 static Lisp_Object | |
| 6042 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6043 { | |
| 6044 struct va_call_trapping_problems *ai_no_corrida = | |
| 6045 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6046 Lisp_Object pegar_no_bumbum; | |
| 6047 | |
| 6048 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6049 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6050 return pegar_no_bumbum; | |
| 6051 } | |
| 6052 | |
| 6053 /* #### document me. */ | |
| 6054 | |
| 6055 Lisp_Object | |
| 6056 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6057 const CIbyte *warning_string, |
| 853 | 6058 int flags, |
| 6059 struct call_trapping_problems_result *problem, | |
| 6060 lisp_fn_t fun, int nargs, ...) | |
| 6061 { | |
| 6062 va_list vargs; | |
| 6063 Lisp_Object args[20]; | |
| 6064 int i; | |
| 6065 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6066 struct gcpro gcpro1; | |
| 6067 | |
| 6068 assert (nargs >= 0 && nargs < 20); | |
| 6069 | |
| 6070 va_start (vargs, nargs); | |
| 6071 for (i = 0; i < nargs; i++) | |
| 6072 args[i] = va_arg (vargs, Lisp_Object); | |
| 6073 va_end (vargs); | |
| 6074 | |
| 6075 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6076 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6077 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6078 | |
| 6079 GCPRO1_ARRAY (args, nargs); | |
| 6080 RETURN_UNGCPRO | |
| 6081 (call_trapping_problems | |
| 6082 (warning_class, warning_string, flags, problem, | |
| 6083 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6084 } | |
| 6085 | |
| 6086 /* this is an older interface, barely different from | |
| 6087 va_call_trapping_problems. | |
| 6088 | |
| 6089 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6090 va_call_trapping_problems(). */ | |
| 6091 | |
| 6092 Lisp_Object | |
| 6093 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6094 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6095 int nargs, ...) |
| 6096 { | |
| 6097 va_list vargs; | |
| 6098 Lisp_Object args[20]; | |
| 6099 int i; | |
| 6100 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6101 int flags; | |
| 6102 struct gcpro gcpro1; | |
| 6103 | |
| 1204 | 6104 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6105 assert (!NILP (class_)); | |
| 853 | 6106 assert (nargs >= 0 && nargs < 20); |
| 6107 | |
| 6108 va_start (vargs, nargs); | |
| 6109 for (i = 0; i < nargs; i++) | |
| 6110 args[i] = va_arg (vargs, Lisp_Object); | |
| 6111 va_end (vargs); | |
| 6112 | |
| 6113 /* If error-checking is not disabled, just call the function. */ | |
| 6114 | |
| 6115 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6116 { | |
| 6117 Lisp_Object val; | |
| 6118 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6119 return val; | |
| 6120 } | |
| 6121 | |
| 6122 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6123 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6124 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6125 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6126 else | |
| 6127 { | |
| 6128 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6129 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6130 } | |
| 6131 | |
| 6132 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6133 | |
| 6134 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6135 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6136 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6137 | |
| 6138 GCPRO1_ARRAY (args, nargs); | |
| 6139 { | |
| 6140 Lisp_Object its_way_too_goddamn_late = | |
| 6141 call_trapping_problems | |
| 1204 | 6142 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6143 &fazer_invocacao_atrapalhando_problemas); |
| 6144 UNGCPRO; | |
| 6145 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6146 return retval; | |
| 6147 else | |
| 6148 return its_way_too_goddamn_late; | |
| 6149 } | |
| 6150 } | |
| 6151 | |
| 6152 struct calln_trapping_problems | |
| 6153 { | |
| 6154 int nargs; | |
| 6155 Lisp_Object *args; | |
| 6156 }; | |
| 6157 | |
| 6158 static Lisp_Object | |
| 6159 calln_trapping_problems_1 (void *puta) | |
| 6160 { | |
| 6161 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6162 | |
| 6163 return Ffuncall (p->nargs, p->args); | |
| 428 | 6164 } |
| 6165 | |
| 6166 static Lisp_Object | |
| 853 | 6167 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6168 const CIbyte *warning_string, int flags, |
| 853 | 6169 struct call_trapping_problems_result *problem, |
| 6170 int nargs, Lisp_Object *args) | |
| 6171 { | |
| 6172 struct calln_trapping_problems foo; | |
| 6173 struct gcpro gcpro1; | |
| 6174 | |
| 6175 if (SYMBOLP (args[0])) | |
| 6176 { | |
| 6177 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6178 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6179 { | |
| 6180 if (problem) | |
| 6181 { | |
| 6182 problem->caught_error = 0; | |
| 6183 problem->caught_throw = 0; | |
| 6184 problem->error_conditions = Qnil; | |
| 6185 problem->data = Qnil; | |
| 6186 problem->backtrace = Qnil; | |
| 6187 problem->thrown_tag = Qnil; | |
| 6188 problem->thrown_value = Qnil; | |
| 6189 } | |
| 6190 return Qnil; | |
| 6191 } | |
| 6192 } | |
| 6193 | |
| 6194 foo.nargs = nargs; | |
| 6195 foo.args = args; | |
| 6196 | |
| 6197 GCPRO1_ARRAY (args, nargs); | |
| 6198 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6199 flags, problem, | |
| 6200 calln_trapping_problems_1, | |
| 6201 &foo)); | |
| 6202 } | |
| 6203 | |
| 6204 /* #### fix these functions to follow the calling convention of | |
| 6205 call_trapping_problems! */ | |
| 6206 | |
| 6207 Lisp_Object | |
| 867 | 6208 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6209 int flags) |
| 6210 { | |
| 6211 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6212 &function); | |
| 428 | 6213 } |
| 6214 | |
| 6215 Lisp_Object | |
| 867 | 6216 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6217 Lisp_Object object, int flags) |
| 6218 { | |
| 6219 Lisp_Object args[2]; | |
| 6220 | |
| 6221 args[0] = function; | |
| 6222 args[1] = object; | |
| 6223 | |
| 6224 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6225 args); | |
| 6226 } | |
| 6227 | |
| 6228 Lisp_Object | |
| 867 | 6229 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6230 Lisp_Object object1, Lisp_Object object2, |
| 6231 int flags) | |
| 6232 { | |
| 6233 Lisp_Object args[3]; | |
| 6234 | |
| 6235 args[0] = function; | |
| 6236 args[1] = object1; | |
| 6237 args[2] = object2; | |
| 6238 | |
| 6239 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6240 args); | |
| 6241 } | |
| 6242 | |
| 6243 Lisp_Object | |
| 867 | 6244 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6245 Lisp_Object object1, Lisp_Object object2, |
| 6246 Lisp_Object object3, int flags) | |
| 6247 { | |
| 6248 Lisp_Object args[4]; | |
| 6249 | |
| 6250 args[0] = function; | |
| 6251 args[1] = object1; | |
| 6252 args[2] = object2; | |
| 6253 args[3] = object3; | |
| 6254 | |
| 6255 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6256 args); | |
| 6257 } | |
| 6258 | |
| 6259 Lisp_Object | |
| 867 | 6260 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6261 Lisp_Object object1, Lisp_Object object2, |
| 6262 Lisp_Object object3, Lisp_Object object4, | |
| 6263 int flags) | |
| 6264 { | |
| 6265 Lisp_Object args[5]; | |
| 6266 | |
| 6267 args[0] = function; | |
| 6268 args[1] = object1; | |
| 6269 args[2] = object2; | |
| 6270 args[3] = object3; | |
| 6271 args[4] = object4; | |
| 6272 | |
| 6273 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6274 args); | |
| 6275 } | |
| 6276 | |
| 6277 Lisp_Object | |
| 867 | 6278 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6279 Lisp_Object object1, Lisp_Object object2, |
| 6280 Lisp_Object object3, Lisp_Object object4, | |
| 6281 Lisp_Object object5, int flags) | |
| 6282 { | |
| 6283 Lisp_Object args[6]; | |
| 6284 | |
| 6285 args[0] = function; | |
| 6286 args[1] = object1; | |
| 6287 args[2] = object2; | |
| 6288 args[3] = object3; | |
| 6289 args[4] = object4; | |
| 6290 args[5] = object5; | |
| 6291 | |
| 6292 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6293 args); | |
| 6294 } | |
| 6295 | |
| 6296 struct eval_in_buffer_trapping_problems | |
| 6297 { | |
| 6298 struct buffer *buf; | |
| 6299 Lisp_Object form; | |
| 6300 }; | |
| 6301 | |
| 6302 static Lisp_Object | |
| 6303 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6304 { | |
| 6305 struct eval_in_buffer_trapping_problems *p = | |
| 6306 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6307 | |
| 6308 return eval_in_buffer (p->buf, p->form); | |
| 6309 } | |
| 6310 | |
| 6311 /* #### fix these functions to follow the calling convention of | |
| 6312 call_trapping_problems! */ | |
| 6313 | |
| 6314 Lisp_Object | |
| 867 | 6315 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6316 struct buffer *buf, Lisp_Object form, |
| 6317 int flags) | |
| 6318 { | |
| 6319 struct eval_in_buffer_trapping_problems p; | |
| 6320 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6321 struct gcpro gcpro1, gcpro2; |
| 6322 | |
| 853 | 6323 GCPRO2 (buffer, form); |
| 6324 p.buf = buf; | |
| 6325 p.form = form; | |
| 6326 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6327 eval_in_buffer_trapping_problems_1, | |
| 6328 &p)); | |
| 6329 } | |
| 6330 | |
| 6331 Lisp_Object | |
| 1333 | 6332 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6333 Lisp_Object hook_symbol, |
| 6334 int flags) | |
| 6335 { | |
| 1333 | 6336 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6337 RUN_HOOKS_TO_COMPLETION, |
| 6338 flags); | |
| 428 | 6339 } |
| 6340 | |
| 6341 static Lisp_Object | |
| 853 | 6342 safe_run_hook_trapping_problems_1 (void *puta) |
| 6343 { | |
| 6344 Lisp_Object hook = VOID_TO_LISP (puta); | |
| 6345 | |
| 6346 run_hook (hook); | |
| 428 | 6347 return Qnil; |
| 6348 } | |
| 6349 | |
| 853 | 6350 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6351 if an error occurs (but not a quit). */ | |
| 6352 | |
| 428 | 6353 Lisp_Object |
| 1333 | 6354 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6355 Lisp_Object hook_symbol, int flags) | |
| 853 | 6356 { |
| 428 | 6357 Lisp_Object tem; |
| 853 | 6358 struct gcpro gcpro1, gcpro2; |
| 6359 struct call_trapping_problems_result prob; | |
| 428 | 6360 |
| 6361 if (!initialized || preparing_for_armageddon) | |
| 6362 return Qnil; | |
| 6363 tem = find_symbol_value (hook_symbol); | |
| 6364 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6365 return Qnil; | |
| 6366 | |
| 853 | 6367 GCPRO2 (hook_symbol, tem); |
| 1333 | 6368 tem = call_trapping_problems (Qerror, NULL, |
| 6369 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6370 &prob, |
| 6371 safe_run_hook_trapping_problems_1, | |
| 6372 LISP_TO_VOID (hook_symbol)); | |
| 1333 | 6373 { |
| 6374 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6375 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6376 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6377 | |
| 6378 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6379 Qquit))) | |
| 6380 { | |
| 6381 Fset (hook_symbol, Qnil); | |
| 6382 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6383 } | |
| 6384 else | |
| 6385 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6386 | |
| 6387 | |
| 6388 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6389 &prob); | |
| 6390 } | |
| 6391 | |
| 6392 UNGCPRO; | |
| 6393 return tem; | |
| 853 | 6394 } |
| 6395 | |
| 6396 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6397 { | |
| 6398 struct buffer *buf; | |
| 6399 int nargs; | |
| 6400 Lisp_Object *args; | |
| 6401 enum run_hooks_condition cond; | |
| 6402 }; | |
| 6403 | |
| 6404 static Lisp_Object | |
| 6405 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6406 { | |
| 6407 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6408 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6409 | |
| 6410 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6411 porra->cond); | |
| 6412 } | |
| 6413 | |
| 6414 /* #### fix these functions to follow the calling convention of | |
| 6415 call_trapping_problems! */ | |
| 428 | 6416 |
| 6417 Lisp_Object | |
| 1333 | 6418 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6419 struct buffer *buf, int nargs, |
| 6420 Lisp_Object *args, | |
| 6421 enum run_hooks_condition cond, | |
| 6422 int flags) | |
| 6423 { | |
| 6424 Lisp_Object sym, val, ret; | |
| 6425 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6426 struct gcpro gcpro1; |
| 1333 | 6427 Lisp_Object hook_name; |
| 6428 Ibyte *hook_str; | |
| 6429 Ibyte *err; | |
| 428 | 6430 |
| 6431 if (!initialized || preparing_for_armageddon) | |
| 853 | 6432 /* We need to bail out of here pronto. */ |
| 428 | 6433 return Qnil; |
| 6434 | |
| 853 | 6435 GCPRO1_ARRAY (args, nargs); |
| 6436 | |
| 6437 sym = args[0]; | |
| 6438 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6439 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6440 | |
| 6441 if (UNBOUNDP (val) || NILP (val)) | |
| 6442 RETURN_UNGCPRO (ret); | |
| 6443 | |
| 6444 diversity_and_distrust.buf = buf; | |
| 6445 diversity_and_distrust.nargs = nargs; | |
| 6446 diversity_and_distrust.args = args; | |
| 6447 diversity_and_distrust.cond = cond; | |
| 6448 | |
| 1333 | 6449 hook_name = XSYMBOL_NAME (args[0]); |
| 6450 hook_str = XSTRING_DATA (hook_name); | |
| 6451 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6452 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6453 RETURN_UNGCPRO |
| 6454 (call_trapping_problems | |
| 1333 | 6455 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6456 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6457 &diversity_and_distrust)); | |
| 428 | 6458 } |
| 6459 | |
| 6460 Lisp_Object | |
| 1333 | 6461 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6462 int nargs, |
| 6463 Lisp_Object *args, | |
| 6464 enum run_hooks_condition cond, | |
| 6465 int flags) | |
| 6466 { | |
| 6467 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6468 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6469 } |
| 6470 | |
| 6471 Lisp_Object | |
| 1333 | 6472 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6473 Lisp_Object hook_var, |
| 6474 int nargs, ...) | |
| 6475 { | |
| 6476 /* This function can GC */ | |
| 6477 struct gcpro gcpro1; | |
| 6478 int i; | |
| 6479 va_list vargs; | |
| 6480 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6481 int flags; | |
| 6482 | |
| 6483 va_start (vargs, nargs); | |
| 6484 funcall_args[0] = hook_var; | |
| 6485 for (i = 0; i < nargs; i++) | |
| 6486 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6487 flags = va_arg (vargs, int); | |
| 6488 va_end (vargs); | |
| 6489 | |
| 6490 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6491 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6492 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6493 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6494 } |
| 6495 | |
| 6496 Lisp_Object | |
| 1333 | 6497 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6498 struct buffer *buf, |
| 6499 Lisp_Object hook_var, | |
| 6500 int nargs, ...) | |
| 6501 { | |
| 6502 /* This function can GC */ | |
| 6503 struct gcpro gcpro1; | |
| 6504 int i; | |
| 6505 va_list vargs; | |
| 6506 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6507 int flags; | |
| 6508 | |
| 6509 va_start (vargs, nargs); | |
| 6510 funcall_args[0] = hook_var; | |
| 6511 for (i = 0; i < nargs; i++) | |
| 6512 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6513 flags = va_arg (vargs, int); | |
| 6514 va_end (vargs); | |
| 6515 | |
| 6516 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6517 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6518 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6519 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6520 } |
| 6521 | |
| 6522 | |
| 6523 /************************************************************************/ | |
| 6524 /* The special binding stack */ | |
| 771 | 6525 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6526 /* When performance is critical, use the macros in backtrace.h. */ |
| 6527 /************************************************************************/ | |
| 6528 | |
| 6529 #define min_max_specpdl_size 400 | |
| 6530 | |
| 6531 void | |
| 647 | 6532 grow_specpdl (EMACS_INT reserved) |
| 6533 { | |
| 6534 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6535 if (size_needed >= max_specpdl_size) |
| 6536 { | |
| 6537 if (max_specpdl_size < min_max_specpdl_size) | |
| 6538 max_specpdl_size = min_max_specpdl_size; | |
| 6539 if (size_needed >= max_specpdl_size) | |
| 6540 { | |
| 1951 | 6541 /* Leave room for some specpdl in the debugger. */ |
| 6542 max_specpdl_size = size_needed + 100; | |
| 6543 if (max_specpdl_size > specpdl_size) | |
| 6544 { | |
| 6545 specpdl_size = max_specpdl_size; | |
| 6546 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6547 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6548 } | |
| 563 | 6549 signal_continuable_error |
| 6550 (Qstack_overflow, | |
| 6551 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6552 } |
| 6553 } | |
| 6554 while (specpdl_size < size_needed) | |
| 6555 { | |
| 6556 specpdl_size *= 2; | |
| 6557 if (specpdl_size > max_specpdl_size) | |
| 6558 specpdl_size = max_specpdl_size; | |
| 6559 } | |
| 6560 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6561 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6562 check_specbind_stack_sanity (); |
| 428 | 6563 } |
| 6564 | |
| 6565 | |
| 6566 /* Handle unbinding buffer-local variables */ | |
| 6567 static Lisp_Object | |
| 6568 specbind_unwind_local (Lisp_Object ovalue) | |
| 6569 { | |
| 6570 Lisp_Object current = Fcurrent_buffer (); | |
| 6571 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6572 Lisp_Object victim = ovalue; |
| 6573 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6574 ovalue = XCDR (victim); | |
| 428 | 6575 |
| 6576 free_cons (victim); | |
| 6577 | |
| 6578 if (NILP (buf)) | |
| 6579 { | |
| 6580 /* Deleted buffer -- do nothing */ | |
| 6581 } | |
| 6582 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6583 { | |
| 6584 /* Was buffer-local when binding was made, now no longer is. | |
| 6585 * (kill-local-variable can do this.) | |
| 6586 * Do nothing in this case. | |
| 6587 */ | |
| 6588 } | |
| 6589 else if (EQ (buf, current)) | |
| 6590 Fset (symbol, ovalue); | |
| 6591 else | |
| 6592 { | |
| 6593 /* Urk! Somebody switched buffers */ | |
| 6594 struct gcpro gcpro1; | |
| 6595 GCPRO1 (current); | |
| 6596 Fset_buffer (buf); | |
| 6597 Fset (symbol, ovalue); | |
| 6598 Fset_buffer (current); | |
| 6599 UNGCPRO; | |
| 6600 } | |
| 6601 return symbol; | |
| 6602 } | |
| 6603 | |
| 6604 static Lisp_Object | |
| 6605 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6606 { | |
| 6607 Lisp_Object current = Fcurrent_buffer (); | |
| 6608 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6609 | |
| 6610 buffer = get_buffer (buffer, 0); | |
| 6611 if (NILP (buffer)) | |
| 6612 { | |
| 6613 /* Deleted buffer -- do nothing */ | |
| 6614 } | |
| 6615 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6616 { | |
| 6617 /* Was buffer-local when binding was made, now no longer is. | |
| 6618 * (kill-local-variable can do this.) | |
| 6619 * Do nothing in this case. | |
| 6620 */ | |
| 6621 } | |
| 6622 else if (EQ (buffer, current)) | |
| 6623 Fkill_local_variable (symbol); | |
| 6624 else | |
| 6625 { | |
| 6626 /* Urk! Somebody switched buffers */ | |
| 6627 struct gcpro gcpro1; | |
| 6628 GCPRO1 (current); | |
| 6629 Fset_buffer (buffer); | |
| 6630 Fkill_local_variable (symbol); | |
| 6631 Fset_buffer (current); | |
| 6632 UNGCPRO; | |
| 6633 } | |
| 6634 return symbol; | |
| 6635 } | |
| 6636 | |
| 6637 | |
| 6638 void | |
| 6639 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6640 { | |
| 6641 SPECBIND (symbol, value); | |
| 853 | 6642 |
| 6643 check_specbind_stack_sanity (); | |
| 428 | 6644 } |
| 6645 | |
| 6646 void | |
| 6647 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6648 { | |
| 6649 int buffer_local = | |
| 6650 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6651 | |
| 6652 if (buffer_local == 0) | |
| 6653 { | |
| 6654 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6655 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6656 } |
| 6657 else if (buffer_local > 0) | |
| 6658 { | |
| 6659 /* Already buffer-local */ | |
| 6660 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6661 find_symbol_value (symbol)); | |
| 6662 specpdl_ptr->func = specbind_unwind_local; | |
| 6663 } | |
| 6664 else | |
| 6665 { | |
| 6666 /* About to become buffer-local */ | |
| 6667 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6668 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6669 } | |
| 6670 | |
| 6671 specpdl_ptr->symbol = symbol; | |
| 6672 specpdl_ptr++; | |
| 6673 specpdl_depth_counter++; | |
| 6674 | |
| 6675 Fset (symbol, value); | |
| 853 | 6676 |
| 6677 check_specbind_stack_sanity (); | |
| 428 | 6678 } |
| 6679 | |
| 771 | 6680 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6681 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6682 before your function returns normally, passing in the integer returned | |
| 6683 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6684 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6685 ignored. #### We should eliminate it entirely. */ | |
| 6686 | |
| 6687 int | |
| 428 | 6688 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6689 Lisp_Object arg) | |
| 6690 { | |
| 6691 SPECPDL_RESERVE (1); | |
| 6692 specpdl_ptr->func = function; | |
| 6693 specpdl_ptr->symbol = Qnil; | |
| 6694 specpdl_ptr->old_value = arg; | |
| 6695 specpdl_ptr++; | |
| 6696 specpdl_depth_counter++; | |
| 853 | 6697 check_specbind_stack_sanity (); |
| 771 | 6698 return specpdl_depth_counter - 1; |
| 6699 } | |
| 6700 | |
| 6701 static Lisp_Object | |
| 802 | 6702 restore_lisp_object (Lisp_Object cons) |
| 6703 { | |
| 6704 Lisp_Object opaque = XCAR (cons); | |
| 6705 Lisp_Object *addr = (Lisp_Object *) get_opaque_ptr (opaque); | |
| 6706 *addr = XCDR (cons); | |
| 6707 free_opaque_ptr (opaque); | |
| 853 | 6708 free_cons (cons); |
| 802 | 6709 return Qnil; |
| 6710 } | |
| 6711 | |
| 6712 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6713 by ADDR with the value VAL. */ | |
| 814 | 6714 static int |
| 802 | 6715 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6716 Lisp_Object val) | |
| 6717 { | |
| 6718 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6719 return record_unwind_protect (restore_lisp_object, | |
| 6720 noseeum_cons (opaque, val)); | |
| 6721 } | |
| 6722 | |
| 6723 /* Similar to specbind() but for any C variable whose value is a | |
| 6724 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6725 pointed to by ADDR to its existing value, and then changes its | |
| 6726 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6727 pass this to unbind_to() after you are done. */ | |
| 6728 int | |
| 6729 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6730 { | |
| 6731 int count = specpdl_depth (); | |
| 6732 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6733 *addr = newval; | |
| 6734 return count; | |
| 6735 } | |
| 6736 | |
| 6737 static Lisp_Object | |
| 6738 restore_int (Lisp_Object cons) | |
| 6739 { | |
| 6740 Lisp_Object opaque = XCAR (cons); | |
| 6741 Lisp_Object lval = XCDR (cons); | |
| 6742 int *addr = (int *) get_opaque_ptr (opaque); | |
| 6743 int val; | |
| 6744 | |
| 4025 | 6745 /* In the event that a C integer will always fit in an Emacs int, we |
| 6746 haven't ever stored a C integer as an opaque pointer. This #ifdef | |
| 6747 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6748 integers have 32 value bits. */ | |
| 6749 #if INT_VALBITS < INTBITS | |
| 802 | 6750 if (INTP (lval)) |
| 4025 | 6751 { |
| 6752 val = XINT (lval); | |
| 6753 } | |
| 802 | 6754 else |
| 6755 { | |
| 6756 val = (int) get_opaque_ptr (lval); | |
| 6757 free_opaque_ptr (lval); | |
| 6758 } | |
| 4025 | 6759 #else /* !(INT_VALBITS < INTBITS) */ |
| 6760 val = XINT(lval); | |
| 6761 #endif /* INT_VALBITS < INTBITS */ | |
| 802 | 6762 |
| 6763 *addr = val; | |
| 6764 free_opaque_ptr (opaque); | |
| 853 | 6765 free_cons (cons); |
| 802 | 6766 return Qnil; |
| 6767 } | |
| 6768 | |
| 6769 /* Establish an unwind-protect which will restore the int pointed to | |
| 6770 by ADDR with the value VAL. This function works correctly with | |
| 6771 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6772 int |
| 802 | 6773 record_unwind_protect_restoring_int (int *addr, int val) |
| 6774 { | |
| 6775 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6776 Lisp_Object lval; | |
| 6777 | |
| 4025 | 6778 /* In the event that a C integer will always fit in an Emacs int, we don't |
| 6779 ever want to store a C integer as an opaque pointer. This #ifdef | |
| 6780 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6781 integers have 32 value bits. */ | |
| 6782 #if INT_VALBITS <= INTBITS | |
| 802 | 6783 if (NUMBER_FITS_IN_AN_EMACS_INT (val)) |
| 6784 lval = make_int (val); | |
| 6785 else | |
| 6786 lval = make_opaque_ptr ((void *) val); | |
| 4025 | 6787 #else /* !(INT_VALBITS < INTBITS) */ |
| 6788 lval = make_int (val); | |
| 6789 #endif /* INT_VALBITS <= INTBITS */ | |
| 6790 | |
| 802 | 6791 return record_unwind_protect (restore_int, noseeum_cons (opaque, lval)); |
| 6792 } | |
| 6793 | |
| 6794 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6795 Sets up an unwind-protect to restore the variable pointed to by | |
| 6796 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6797 Returns the previous value of specpdl_depth(); pass this to | |
| 6798 unbind_to() after you are done. This function works correctly with | |
| 6799 all ints, even those that don't fit into a Lisp integer. */ | |
| 6800 int | |
| 6801 internal_bind_int (int *addr, int newval) | |
| 6802 { | |
| 6803 int count = specpdl_depth (); | |
| 6804 record_unwind_protect_restoring_int (addr, *addr); | |
| 6805 *addr = newval; | |
| 6806 return count; | |
| 6807 } | |
| 6808 | |
| 6809 static Lisp_Object | |
| 771 | 6810 free_pointer (Lisp_Object opaque) |
| 6811 { | |
| 1726 | 6812 xfree (get_opaque_ptr (opaque), void *); |
| 771 | 6813 free_opaque_ptr (opaque); |
| 6814 return Qnil; | |
| 6815 } | |
| 6816 | |
| 6817 /* Establish an unwind-protect which will free the specified block. | |
| 6818 */ | |
| 6819 int | |
| 6820 record_unwind_protect_freeing (void *ptr) | |
| 6821 { | |
| 6822 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6823 return record_unwind_protect (free_pointer, opaque); | |
| 6824 } | |
| 6825 | |
| 6826 static Lisp_Object | |
| 6827 free_dynarr (Lisp_Object opaque) | |
| 6828 { | |
| 6829 Dynarr_free (get_opaque_ptr (opaque)); | |
| 6830 free_opaque_ptr (opaque); | |
| 6831 return Qnil; | |
| 6832 } | |
| 6833 | |
| 6834 int | |
| 6835 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6836 { | |
| 6837 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6838 return record_unwind_protect (free_dynarr, opaque); | |
| 6839 } | |
| 428 | 6840 |
| 6841 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6842 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6843 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6844 Lisp_Object |
| 771 | 6845 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6846 { |
| 6847 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6848 check_specbind_stack_sanity (); |
| 428 | 6849 return value; |
| 6850 } | |
| 6851 | |
| 6852 /* Don't call this directly. | |
| 6853 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6854 void | |
| 6855 unbind_to_hairy (int count) | |
| 6856 { | |
| 442 | 6857 ++specpdl_ptr; |
| 6858 ++specpdl_depth_counter; | |
| 6859 | |
| 428 | 6860 while (specpdl_depth_counter != count) |
| 6861 { | |
| 1313 | 6862 Lisp_Object oquit = Qunbound; |
| 6863 | |
| 6864 /* Do this check BEFORE decrementing the values below, because once | |
| 6865 they're decremented, GC protection is lost on | |
| 6866 specpdl_ptr->old_value. */ | |
| 1322 | 6867 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6868 { |
| 6869 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6870 existing QUIT until afterwards. Only do this, however, for | |
| 6871 unwind-protects established by Lisp code, not by C code | |
| 6872 (e.g. free_opaque_ptr() or something), because the act of | |
| 6873 checking for QUIT can cause all sorts of weird things to | |
| 6874 happen, since it churns the event loop -- redisplay, running | |
| 6875 Lisp, etc. Code should not have to worry about this just | |
| 6876 because of establishing an unwind-protect. */ | |
| 6877 check_quit (); /* make Vquit_flag accurate */ | |
| 6878 oquit = Vquit_flag; | |
| 6879 Vquit_flag = Qnil; | |
| 6880 } | |
| 6881 | |
| 428 | 6882 --specpdl_ptr; |
| 6883 --specpdl_depth_counter; | |
| 6884 | |
| 1313 | 6885 /* #### At this point, there is no GC protection on old_value. This |
| 6886 could be a real problem, depending on what unwind-protect function | |
| 6887 is called. It looks like it just so happens that the ones | |
| 6888 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6889 we should look into fixing this. (Many unwind-protect functions | |
| 6890 free values. Is it a problem if freed values are | |
| 6891 GC-protected?) */ | |
| 428 | 6892 if (specpdl_ptr->func != 0) |
| 1313 | 6893 { |
| 6894 /* An unwind-protect */ | |
| 6895 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6896 } | |
| 6897 | |
| 428 | 6898 else |
| 6899 { | |
| 6900 /* We checked symbol for validity when we specbound it, | |
| 6901 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6902 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6903 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6904 sym->value = specpdl_ptr->old_value; | |
| 6905 else | |
| 6906 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6907 } | |
| 6908 | |
| 6909 #if 0 /* martin */ | |
| 6910 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6911 /* There should never be anything here for us to remove. | |
| 6912 If so, it indicates a logic error in Emacs. Catches | |
| 6913 should get removed when a throw or signal occurs, or | |
| 6914 when a catch or condition-case exits normally. But | |
| 6915 it's too dangerous to just remove this code. --ben */ | |
| 6916 | |
| 6917 /* Furthermore, this code is not in FSFmacs!!! | |
| 6918 Braino on mly's part? */ | |
| 6919 /* If we're unwound past the pdlcount of a catch frame, | |
| 6920 that catch can't possibly still be valid. */ | |
| 6921 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6922 { | |
| 6923 catchlist = catchlist->next; | |
| 6924 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6925 } | |
| 6926 #endif | |
| 6927 #endif | |
| 1313 | 6928 |
| 6929 if (!UNBOUNDP (oquit)) | |
| 6930 Vquit_flag = oquit; | |
| 428 | 6931 } |
| 853 | 6932 check_specbind_stack_sanity (); |
| 428 | 6933 } |
| 6934 | |
| 6935 | |
| 6936 | |
| 6937 /* Get the value of symbol's global binding, even if that binding is | |
| 6938 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6939 | |
| 6940 Lisp_Object | |
| 6941 top_level_value (Lisp_Object symbol) | |
| 6942 { | |
| 6943 REGISTER struct specbinding *ptr = specpdl; | |
| 6944 | |
| 6945 CHECK_SYMBOL (symbol); | |
| 6946 for (; ptr != specpdl_ptr; ptr++) | |
| 6947 { | |
| 6948 if (EQ (ptr->symbol, symbol)) | |
| 6949 return ptr->old_value; | |
| 6950 } | |
| 6951 return XSYMBOL (symbol)->value; | |
| 6952 } | |
| 6953 | |
| 6954 #if 0 | |
| 6955 | |
| 6956 Lisp_Object | |
| 6957 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6958 { | |
| 6959 REGISTER struct specbinding *ptr = specpdl; | |
| 6960 | |
| 6961 CHECK_SYMBOL (symbol); | |
| 6962 for (; ptr != specpdl_ptr; ptr++) | |
| 6963 { | |
| 6964 if (EQ (ptr->symbol, symbol)) | |
| 6965 { | |
| 6966 ptr->old_value = newval; | |
| 6967 return newval; | |
| 6968 } | |
| 6969 } | |
| 6970 return Fset (symbol, newval); | |
| 6971 } | |
| 6972 | |
| 6973 #endif /* 0 */ | |
| 6974 | |
| 6975 | |
| 6976 /************************************************************************/ | |
| 6977 /* Backtraces */ | |
| 6978 /************************************************************************/ | |
| 6979 | |
| 6980 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 6981 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 6982 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 6983 */ | |
| 6984 (level, flag)) | |
| 6985 { | |
| 6986 REGISTER struct backtrace *backlist = backtrace_list; | |
| 6987 REGISTER int i; | |
| 6988 | |
| 6989 CHECK_INT (level); | |
| 6990 | |
| 6991 for (i = 0; backlist && i < XINT (level); i++) | |
| 6992 { | |
| 6993 backlist = backlist->next; | |
| 6994 } | |
| 6995 | |
| 6996 if (backlist) | |
| 6997 backlist->debug_on_exit = !NILP (flag); | |
| 6998 | |
| 6999 return flag; | |
| 7000 } | |
| 7001 | |
| 7002 static void | |
| 7003 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 7004 { | |
| 7005 int printing_bindings = 0; | |
| 7006 | |
| 7007 for (; speccount > speclimit; speccount--) | |
| 7008 { | |
| 7009 if (specpdl[speccount - 1].func == 0 | |
| 7010 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7011 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7012 { | |
| 826 | 7013 write_c_string (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7014 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7015 printing_bindings = 1; | |
| 7016 } | |
| 7017 else | |
| 7018 { | |
| 826 | 7019 if (printing_bindings) write_c_string (stream, ")\n"); |
| 7020 write_c_string (stream, " # (unwind-protect ...)\n"); | |
| 428 | 7021 printing_bindings = 0; |
| 7022 } | |
| 7023 } | |
| 826 | 7024 if (printing_bindings) write_c_string (stream, ")\n"); |
| 428 | 7025 } |
| 7026 | |
| 1292 | 7027 static Lisp_Object |
| 7028 backtrace_unevalled_args (Lisp_Object *args) | |
| 7029 { | |
| 7030 if (args) | |
| 7031 return *args; | |
| 7032 else | |
| 7033 return list1 (build_string ("[internal]")); | |
| 7034 } | |
| 7035 | |
| 428 | 7036 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7037 Print a trace of Lisp function calls currently active. | |
| 438 | 7038 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7039 and defaults to the value of `standard-output'. |
| 7040 Optional second arg DETAILED non-nil means show places where currently | |
| 7041 active variable bindings, catches, condition-cases, and | |
| 7042 unwind-protects, as well as function calls, were made. | |
| 428 | 7043 */ |
| 7044 (stream, detailed)) | |
| 7045 { | |
| 7046 /* This function can GC */ | |
| 7047 struct backtrace *backlist = backtrace_list; | |
| 7048 struct catchtag *catches = catchlist; | |
| 7049 int speccount = specpdl_depth(); | |
| 7050 | |
| 7051 int old_nl = print_escape_newlines; | |
| 7052 int old_pr = print_readably; | |
| 7053 Lisp_Object old_level = Vprint_level; | |
| 7054 Lisp_Object oiq = Vinhibit_quit; | |
| 7055 struct gcpro gcpro1, gcpro2; | |
| 7056 | |
| 7057 /* We can't allow quits in here because that could cause the values | |
| 7058 of print_readably and print_escape_newlines to get screwed up. | |
| 7059 Normally we would use a record_unwind_protect but that would | |
| 7060 screw up the functioning of this function. */ | |
| 7061 Vinhibit_quit = Qt; | |
| 7062 | |
| 7063 entering_debugger = 0; | |
| 7064 | |
| 872 | 7065 if (!NILP (detailed)) |
| 7066 Vprint_level = make_int (50); | |
| 7067 else | |
| 7068 Vprint_level = make_int (3); | |
| 428 | 7069 print_readably = 0; |
| 7070 print_escape_newlines = 1; | |
| 7071 | |
| 7072 GCPRO2 (stream, old_level); | |
| 7073 | |
| 1261 | 7074 stream = canonicalize_printcharfun (stream); |
| 428 | 7075 |
| 7076 for (;;) | |
| 7077 { | |
| 7078 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7079 { | |
| 7080 int catchpdl = catches->pdlcount; | |
| 438 | 7081 if (speccount > catchpdl |
| 7082 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7083 /* This is a condition-case catchpoint */ |
| 7084 catchpdl = catchpdl + 1; | |
| 7085 | |
| 7086 backtrace_specials (speccount, catchpdl, stream); | |
| 7087 | |
| 7088 speccount = catches->pdlcount; | |
| 7089 if (catchpdl == speccount) | |
| 7090 { | |
| 826 | 7091 write_c_string (stream, " # (catch "); |
| 428 | 7092 Fprin1 (catches->tag, stream); |
| 826 | 7093 write_c_string (stream, " ...)\n"); |
| 428 | 7094 } |
| 7095 else | |
| 7096 { | |
| 826 | 7097 write_c_string (stream, " # (condition-case ... . "); |
| 428 | 7098 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
| 826 | 7099 write_c_string (stream, ")\n"); |
| 428 | 7100 } |
| 7101 catches = catches->next; | |
| 7102 } | |
| 7103 else if (!backlist) | |
| 7104 break; | |
| 7105 else | |
| 7106 { | |
| 7107 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7108 { | |
| 7109 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7110 speccount = backlist->pdlcount; | |
| 7111 } | |
| 826 | 7112 write_c_string (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7113 if (backlist->nargs == UNEVALLED) |
| 7114 { | |
| 1292 | 7115 Fprin1 (Fcons (*backlist->function, |
| 7116 backtrace_unevalled_args (backlist->args)), | |
| 7117 stream); | |
| 826 | 7118 write_c_string (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7119 } |
| 7120 else | |
| 7121 { | |
| 7122 Lisp_Object tem = *backlist->function; | |
| 7123 Fprin1 (tem, stream); /* This can QUIT */ | |
| 826 | 7124 write_c_string (stream, "("); |
| 428 | 7125 if (backlist->nargs == MANY) |
| 7126 { | |
| 7127 int i; | |
| 7128 Lisp_Object tail = Qnil; | |
| 7129 struct gcpro ngcpro1; | |
| 7130 | |
| 7131 NGCPRO1 (tail); | |
| 7132 for (tail = *backlist->args, i = 0; | |
| 7133 !NILP (tail); | |
| 7134 tail = Fcdr (tail), i++) | |
| 7135 { | |
| 826 | 7136 if (i != 0) write_c_string (stream, " "); |
| 428 | 7137 Fprin1 (Fcar (tail), stream); |
| 7138 } | |
| 7139 NUNGCPRO; | |
| 7140 } | |
| 7141 else | |
| 7142 { | |
| 7143 int i; | |
| 7144 for (i = 0; i < backlist->nargs; i++) | |
| 7145 { | |
| 826 | 7146 if (!i && EQ (tem, Qbyte_code)) |
| 7147 { | |
| 7148 write_c_string (stream, "\"...\""); | |
| 7149 continue; | |
| 7150 } | |
| 7151 if (i != 0) write_c_string (stream, " "); | |
| 428 | 7152 Fprin1 (backlist->args[i], stream); |
| 7153 } | |
| 7154 } | |
| 826 | 7155 write_c_string (stream, ")\n"); |
| 428 | 7156 } |
| 7157 backlist = backlist->next; | |
| 7158 } | |
| 7159 } | |
| 7160 Vprint_level = old_level; | |
| 7161 print_readably = old_pr; | |
| 7162 print_escape_newlines = old_nl; | |
| 7163 UNGCPRO; | |
| 7164 Vinhibit_quit = oiq; | |
| 7165 return Qnil; | |
| 7166 } | |
| 7167 | |
| 7168 | |
| 444 | 7169 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7170 Return the function and arguments NFRAMES up from current execution point. | |
| 428 | 7171 If that frame has not evaluated the arguments yet (or is a special form), |
| 7172 the value is (nil FUNCTION ARG-FORMS...). | |
| 7173 If that frame has evaluated its arguments and called its function already, | |
| 7174 the value is (t FUNCTION ARG-VALUES...). | |
| 7175 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7176 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7177 or a lambda expression for macro calls. | |
| 444 | 7178 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7179 */ |
| 7180 (nframes)) | |
| 7181 { | |
| 7182 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7183 REGISTER int i; | |
| 7184 Lisp_Object tem; | |
| 7185 | |
| 7186 CHECK_NATNUM (nframes); | |
| 7187 | |
| 7188 /* Find the frame requested. */ | |
| 7189 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7190 backlist = backlist->next; | |
| 7191 | |
| 7192 if (!backlist) | |
| 7193 return Qnil; | |
| 7194 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7195 return Fcons (Qnil, Fcons (*backlist->function, |
| 7196 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7197 else |
| 7198 { | |
| 7199 if (backlist->nargs == MANY) | |
| 7200 tem = *backlist->args; | |
| 7201 else | |
| 7202 tem = Flist (backlist->nargs, backlist->args); | |
| 7203 | |
| 7204 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7205 } | |
| 7206 } | |
| 7207 | |
| 7208 | |
| 7209 /************************************************************************/ | |
| 7210 /* Warnings */ | |
| 7211 /************************************************************************/ | |
| 7212 | |
| 1123 | 7213 static int |
| 7214 warning_will_be_discarded (Lisp_Object level) | |
| 7215 { | |
| 7216 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7217 to avoid excessive consing. */ | |
| 7218 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7219 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7220 } | |
| 7221 | |
| 428 | 7222 void |
| 1204 | 7223 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7224 Lisp_Object obj) |
| 7225 { | |
| 1123 | 7226 if (warning_will_be_discarded (level)) |
| 793 | 7227 return; |
| 1123 | 7228 |
| 1204 | 7229 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7230 if (NILP (Vpending_warnings)) |
| 7231 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7232 else | |
| 7233 { | |
| 7234 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7235 Vpending_warnings_tail = obj; | |
| 7236 } | |
| 7237 } | |
| 7238 | |
| 7239 /* #### This should probably accept Lisp objects; but then we have | |
| 7240 to make sure that Feval() isn't called, since it might not be safe. | |
| 7241 | |
| 7242 An alternative approach is to just pass some non-string type of | |
| 7243 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7244 automatically be called when it is safe to do so. */ | |
| 7245 | |
| 7246 void | |
| 1204 | 7247 warn_when_safe (Lisp_Object class_, Lisp_Object level, const CIbyte *fmt, ...) |
| 428 | 7248 { |
| 7249 Lisp_Object obj; | |
| 7250 va_list args; | |
| 7251 | |
| 1123 | 7252 if (warning_will_be_discarded (level)) |
| 793 | 7253 return; |
| 1123 | 7254 |
| 428 | 7255 va_start (args, fmt); |
| 771 | 7256 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 7257 va_end (args); |
| 7258 | |
| 1204 | 7259 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7260 } |
| 7261 | |
| 7262 | |
| 7263 | |
| 7264 | |
| 7265 /************************************************************************/ | |
| 7266 /* Initialization */ | |
| 7267 /************************************************************************/ | |
| 7268 | |
| 7269 void | |
| 7270 syms_of_eval (void) | |
| 7271 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
7272 INIT_LISP_OBJECT (subr); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
7273 INIT_LISP_OBJECT (multiple_value); |
| 442 | 7274 |
| 563 | 7275 DEFSYMBOL (Qinhibit_quit); |
| 7276 DEFSYMBOL (Qautoload); | |
| 7277 DEFSYMBOL (Qdebug_on_error); | |
| 7278 DEFSYMBOL (Qstack_trace_on_error); | |
| 7279 DEFSYMBOL (Qdebug_on_signal); | |
| 7280 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7281 DEFSYMBOL (Qdebugger); | |
| 7282 DEFSYMBOL (Qmacro); | |
| 428 | 7283 defsymbol (&Qand_rest, "&rest"); |
| 7284 defsymbol (&Qand_optional, "&optional"); | |
| 7285 /* Note that the process code also uses Qexit */ | |
| 563 | 7286 DEFSYMBOL (Qexit); |
| 7287 DEFSYMBOL (Qsetq); | |
| 7288 DEFSYMBOL (Qinteractive); | |
| 7289 DEFSYMBOL (Qcommandp); | |
| 7290 DEFSYMBOL (Qdefun); | |
| 7291 DEFSYMBOL (Qprogn); | |
| 7292 DEFSYMBOL (Qvalues); | |
| 7293 DEFSYMBOL (Qdisplay_warning); | |
| 7294 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7295 DEFSYMBOL (Qfinalize_list); |
| 563 | 7296 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7297 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7298 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7299 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7300 |
| 7301 DEFSUBR (For); | |
| 7302 DEFSUBR (Fand); | |
| 7303 DEFSUBR (Fif); | |
| 7304 DEFSUBR_MACRO (Fwhen); | |
| 7305 DEFSUBR_MACRO (Funless); | |
| 7306 DEFSUBR (Fcond); | |
| 7307 DEFSUBR (Fprogn); | |
| 7308 DEFSUBR (Fprog1); | |
| 7309 DEFSUBR (Fprog2); | |
| 7310 DEFSUBR (Fsetq); | |
| 7311 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7312 DEFSUBR (Fquote_maybe); |
| 428 | 7313 DEFSUBR (Ffunction); |
| 7314 DEFSUBR (Fdefun); | |
| 7315 DEFSUBR (Fdefmacro); | |
| 7316 DEFSUBR (Fdefvar); | |
| 7317 DEFSUBR (Fdefconst); | |
| 7318 DEFSUBR (Flet); | |
| 7319 DEFSUBR (FletX); | |
| 7320 DEFSUBR (Fwhile); | |
| 7321 DEFSUBR (Fmacroexpand_internal); | |
| 7322 DEFSUBR (Fcatch); | |
| 7323 DEFSUBR (Fthrow); | |
| 7324 DEFSUBR (Funwind_protect); | |
| 7325 DEFSUBR (Fcondition_case); | |
| 7326 DEFSUBR (Fcall_with_condition_handler); | |
| 7327 DEFSUBR (Fsignal); | |
| 7328 DEFSUBR (Finteractive_p); | |
| 7329 DEFSUBR (Fcommandp); | |
| 7330 DEFSUBR (Fcommand_execute); | |
| 7331 DEFSUBR (Fautoload); | |
| 7332 DEFSUBR (Feval); | |
| 7333 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7334 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7335 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7336 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7337 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7338 DEFSUBR (Fvalues_list); |
| 428 | 7339 DEFSUBR (Ffuncall); |
| 7340 DEFSUBR (Ffunctionp); | |
| 7341 DEFSUBR (Ffunction_min_args); | |
| 7342 DEFSUBR (Ffunction_max_args); | |
| 7343 DEFSUBR (Frun_hooks); | |
| 7344 DEFSUBR (Frun_hook_with_args); | |
| 7345 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7346 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7347 DEFSUBR (Fbacktrace_debug); | |
| 7348 DEFSUBR (Fbacktrace); | |
| 7349 DEFSUBR (Fbacktrace_frame); | |
| 7350 } | |
| 7351 | |
| 7352 void | |
| 814 | 7353 init_eval_semi_early (void) |
| 428 | 7354 { |
| 7355 specpdl_ptr = specpdl; | |
| 7356 specpdl_depth_counter = 0; | |
| 7357 catchlist = 0; | |
| 7358 Vcondition_handlers = Qnil; | |
| 7359 backtrace_list = 0; | |
| 7360 Vquit_flag = Qnil; | |
| 7361 debug_on_next_call = 0; | |
| 7362 lisp_eval_depth = 0; | |
| 7363 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7364 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7365 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7366 multiple_value_current_limit = 1; |
| 428 | 7367 } |
| 7368 | |
| 7369 void | |
| 7370 reinit_vars_of_eval (void) | |
| 7371 { | |
| 7372 preparing_for_armageddon = 0; | |
| 7373 in_warnings = 0; | |
| 7374 specpdl_size = 50; | |
| 7375 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7376 /* XEmacs change: increase these values. */ | |
| 7377 max_specpdl_size = 3000; | |
| 442 | 7378 max_lisp_eval_depth = 1000; |
| 7379 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7380 throw_level = 0; |
| 7381 #endif | |
| 2367 | 7382 init_eval_semi_early (); |
| 428 | 7383 } |
| 7384 | |
| 7385 void | |
| 7386 vars_of_eval (void) | |
| 7387 { | |
| 7388 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7389 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7390 */ ); | |
| 7391 | |
| 7392 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7393 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7394 This limit is to catch infinite recursions for you before they cause | |
| 7395 actual stack overflow in C, which would be fatal for Emacs. | |
| 7396 You can safely make it considerably larger than its default value, | |
| 7397 if that proves inconveniently small. | |
| 7398 */ ); | |
| 7399 | |
| 7400 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7401 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7402 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7403 Normally, you do not need to set this value yourself. It is set to | |
| 7404 t each time a Control-G is detected, and to `critical' each time a | |
| 7405 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7406 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7407 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7408 it's correct to do so. |
| 428 | 7409 */ ); |
| 7410 Vquit_flag = Qnil; | |
| 7411 | |
| 7412 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7413 Non-nil inhibits C-g quitting from happening immediately. | |
| 7414 Note that `quit-flag' will still be set by typing C-g, | |
| 7415 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7416 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7417 before making `inhibit-quit' nil. |
| 7418 | |
| 7419 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7420 requested by typing control-shift-G in a window-system frame; | |
| 7421 this is explained in more detail in `quit-flag'. | |
| 428 | 7422 */ ); |
| 7423 Vinhibit_quit = Qnil; | |
| 7424 | |
| 7425 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7426 *Non-nil means automatically display a backtrace buffer | |
| 7427 after any error that is not handled by a `condition-case'. | |
| 7428 If the value is a list, an error only means to display a backtrace | |
| 7429 if one of its condition symbols appears in the list. | |
| 7430 See also variable `stack-trace-on-signal'. | |
| 7431 */ ); | |
| 7432 Vstack_trace_on_error = Qnil; | |
| 7433 | |
| 7434 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7435 *Non-nil means automatically display a backtrace buffer | |
| 7436 after any error that is signalled, whether or not it is handled by | |
| 7437 a `condition-case'. | |
| 7438 If the value is a list, an error only means to display a backtrace | |
| 7439 if one of its condition symbols appears in the list. | |
| 7440 See also variable `stack-trace-on-error'. | |
| 7441 */ ); | |
| 7442 Vstack_trace_on_signal = Qnil; | |
| 7443 | |
| 7444 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7445 *List of errors for which the debugger should not be called. | |
| 7446 Each element may be a condition-name or a regexp that matches error messages. | |
| 7447 If any element applies to a given error, that error skips the debugger | |
| 7448 and just returns to top level. | |
| 7449 This overrides the variable `debug-on-error'. | |
| 7450 It does not apply to errors handled by `condition-case'. | |
| 7451 */ ); | |
| 7452 Vdebug_ignored_errors = Qnil; | |
| 7453 | |
| 7454 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7455 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7456 The debugger will not be entered if the error is handled by | |
| 7457 a `condition-case'. | |
| 7458 If the value is a list, an error only means to enter the debugger | |
| 7459 if one of its condition symbols appears in the list. | |
| 7460 This variable is overridden by `debug-ignored-errors'. | |
| 7461 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7462 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7463 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
|
7464 (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
|
7465 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
|
7466 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
|
7467 |
| 1123 | 7468 If this variable is set while XEmacs is running noninteractively (using |
| 7469 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7470 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7471 obviously won't work), XEmacs will break out to a C debugger using | |
| 7472 \(force-debugging-signal t). This is useful because debugging | |
| 7473 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7474 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7475 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7476 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7477 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7478 is about to die anyway, and if no debugger is present, this will usefully | |
| 7479 dump core.) The most useful way to set this flag when debugging | |
| 7480 noninteractive runs, especially in makefiles, is using the environment | |
| 7481 variable XEMACSDEBUG, like this: | |
| 771 | 7482 |
| 7483 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7484 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7485 */ ); |
| 7486 Vdebug_on_error = Qnil; | |
| 7487 | |
| 7488 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7489 *Non-nil means enter debugger if an error is signalled. | |
| 7490 The debugger will be entered whether or not the error is handled by | |
| 7491 a `condition-case'. | |
| 7492 If the value is a list, an error only means to enter the debugger | |
| 7493 if one of its condition symbols appears in the list. | |
| 7494 See also variable `debug-on-quit'. | |
| 1123 | 7495 |
| 7496 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7497 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7498 */ ); |
| 7499 Vdebug_on_signal = Qnil; | |
| 7500 | |
| 7501 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7502 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7503 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7504 debugger can also be achieved at any time (for X11 console) by typing | |
| 7505 control-shift-G to signal a critical quit. | |
| 7506 */ ); | |
| 7507 debug_on_quit = 0; | |
| 7508 | |
| 7509 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7510 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7511 */ ); | |
| 7512 | |
| 1292 | 7513 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7514 &backtrace_with_internal_sections /* | |
| 7515 Non-nil means backtraces will contain additional information indicating | |
| 7516 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7517 byte-char conversion, internal-external conversion, etc. This can be | |
| 7518 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7519 */ ); | |
| 7520 #ifdef ERROR_CHECK_STRUCTURES | |
| 7521 backtrace_with_internal_sections = 1; | |
| 7522 #else | |
| 7523 backtrace_with_internal_sections = 0; | |
| 7524 #endif | |
| 7525 | |
| 428 | 7526 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7527 Function to call to invoke debugger. | |
| 7528 If due to frame exit, args are `exit' and the value being returned; | |
| 7529 this function's value will be returned instead of that. | |
| 7530 If due to error, args are `error' and a list of the args to `signal'. | |
| 7531 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7532 If due to `eval' entry, one arg, t. | |
| 7533 */ ); | |
| 7534 Vdebugger = Qnil; | |
| 7535 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7536 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
|
7537 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
|
7538 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7539 This applies to `values', `values-list', `multiple-value-bind' and related |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7540 macros and special forms. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7541 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7542 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
|
7543 |
| 853 | 7544 staticpro (&Vcatch_everything_tag); |
| 7545 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7546 | |
| 428 | 7547 staticpro (&Vpending_warnings); |
| 7548 Vpending_warnings = Qnil; | |
| 1204 | 7549 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7550 Vpending_warnings_tail = Qnil; |
| 7551 | |
| 793 | 7552 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7553 Vlog_warning_minimum_level = Qinfo; | |
| 7554 | |
| 428 | 7555 staticpro (&Vautoload_queue); |
| 7556 Vautoload_queue = Qnil; | |
| 7557 | |
| 7558 staticpro (&Vcondition_handlers); | |
| 7559 | |
| 853 | 7560 staticpro (&Vdeletable_permanent_display_objects); |
| 7561 Vdeletable_permanent_display_objects = Qnil; | |
| 7562 | |
| 7563 staticpro (&Vmodifiable_buffers); | |
| 7564 Vmodifiable_buffers = Qnil; | |
| 7565 | |
| 7566 inhibit_flags = 0; | |
| 7567 } |