Mercurial > hg > xemacs-beta
annotate src/eval.c @ 4679:2c64d2bbb316
Test the multiple-value functionality.
tests/ChangeLog addition:
2009-08-16 Aidan Kehoe <kehoea@parhasard.net>
* automated/lisp-tests.el (foo):
Test the Common Lisp-compatibile multiple value functionality.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Sun, 16 Aug 2009 21:00:08 +0100 |
| parents | 8f1ee2d15784 |
| children | cdabd56ce1b5 |
| 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 |
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247 static int first_desired_multiple_value; |
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248 /* Used outside this file, somewhat uncleanly, in the IGNORE_MULTIPLE_VALUES |
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249 macro: */ |
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250 int multiple_value_current_limit; |
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251 |
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252 Fixnum Vmultiple_values_limit; |
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253 |
| 853 | 254 /* Flags specifying which operations are currently inhibited. */ |
| 255 int inhibit_flags; | |
| 256 | |
| 257 /* Buffers, frames, windows, devices, and consoles created since most | |
| 258 recent active | |
| 259 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION). | |
| 260 */ | |
| 261 Lisp_Object Vdeletable_permanent_display_objects; | |
| 262 | |
| 263 /* Buffers created since most recent active | |
| 264 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */ | |
| 265 Lisp_Object Vmodifiable_buffers; | |
| 793 | 266 |
| 267 /* Minimum level at which warnings are logged. Below this, they're ignored | |
| 268 entirely -- not even generated. */ | |
| 269 Lisp_Object Vlog_warning_minimum_level; | |
| 270 | |
| 428 | 271 /* Non-nil means record all fset's and provide's, to be undone |
| 272 if the file being autoloaded is not fully loaded. | |
| 273 They are recorded by being consed onto the front of Vautoload_queue: | |
| 274 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
| 275 Lisp_Object Vautoload_queue; | |
| 276 | |
| 277 /* Current number of specbindings allocated in specpdl. */ | |
| 278 int specpdl_size; | |
| 279 | |
| 280 /* Pointer to beginning of specpdl. */ | |
| 281 struct specbinding *specpdl; | |
| 282 | |
| 283 /* Pointer to first unused element in specpdl. */ | |
| 284 struct specbinding *specpdl_ptr; | |
| 285 | |
| 286 /* specpdl_ptr - specpdl */ | |
| 287 int specpdl_depth_counter; | |
| 288 | |
| 289 /* Maximum size allowed for specpdl allocation */ | |
| 458 | 290 Fixnum max_specpdl_size; |
| 428 | 291 |
| 292 /* Depth in Lisp evaluations and function calls. */ | |
| 1292 | 293 int lisp_eval_depth; |
| 428 | 294 |
| 295 /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
| 458 | 296 Fixnum max_lisp_eval_depth; |
| 428 | 297 |
| 298 /* Nonzero means enter debugger before next function call */ | |
| 299 static int debug_on_next_call; | |
| 300 | |
| 1292 | 301 int backtrace_with_internal_sections; |
| 302 | |
| 428 | 303 /* List of conditions (non-nil atom means all) which cause a backtrace |
| 304 if an error is handled by the command loop's error handler. */ | |
| 305 Lisp_Object Vstack_trace_on_error; | |
| 306 | |
| 307 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 308 if an error is handled by the command loop's error handler. */ | |
| 309 Lisp_Object Vdebug_on_error; | |
| 310 | |
| 311 /* List of conditions and regexps specifying error messages which | |
| 312 do not enter the debugger even if Vdebug_on_error says they should. */ | |
| 313 Lisp_Object Vdebug_ignored_errors; | |
| 314 | |
| 315 /* List of conditions (non-nil atom means all) which cause a backtrace | |
| 316 if any error is signalled. */ | |
| 317 Lisp_Object Vstack_trace_on_signal; | |
| 318 | |
| 319 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 320 if any error is signalled. */ | |
| 321 Lisp_Object Vdebug_on_signal; | |
| 322 | |
| 323 /* Nonzero means enter debugger if a quit signal | |
| 324 is handled by the command loop's error handler. | |
| 325 | |
| 326 From lisp, this is a boolean variable and may have the values 0 and 1. | |
| 327 But, eval.c temporarily uses the second bit of this variable to indicate | |
| 328 that a critical_quit is in progress. The second bit is reset immediately | |
| 329 after it is processed in signal_call_debugger(). */ | |
| 330 int debug_on_quit; | |
| 331 | |
| 332 #if 0 /* FSFmacs */ | |
| 333 /* entering_debugger is basically equivalent */ | |
| 334 /* The value of num_nonmacro_input_chars as of the last time we | |
| 335 started to enter the debugger. If we decide to enter the debugger | |
| 336 again when this is still equal to num_nonmacro_input_chars, then we | |
| 337 know that the debugger itself has an error, and we should just | |
| 338 signal the error instead of entering an infinite loop of debugger | |
| 339 invocations. */ | |
| 340 int when_entered_debugger; | |
| 341 #endif | |
| 342 | |
| 343 /* Nonzero means we are trying to enter the debugger. | |
| 344 This is to prevent recursive attempts. | |
| 345 Cleared by the debugger calling Fbacktrace */ | |
| 346 static int entering_debugger; | |
| 347 | |
| 348 /* Function to call to invoke the debugger */ | |
| 349 Lisp_Object Vdebugger; | |
| 350 | |
| 853 | 351 /* List of condition handlers currently in effect. |
| 352 The elements of this lists were at one point in the past | |
| 353 threaded through the stack frames of Fcondition_case and | |
| 354 related functions, but now are stored separately in a normal | |
| 355 stack. When an error is signaled (by calling Fsignal, below), | |
| 356 this list is searched for an element that applies. | |
| 428 | 357 |
| 358 Each element of this list is one of the following: | |
| 359 | |
| 853 | 360 -- A list of a handler function and possibly args to pass to the |
| 361 function. This is a handler established with the Lisp primitive | |
| 362 `call-with-condition-handler' or related C function | |
| 363 call_with_condition_handler(): | |
| 364 | |
| 365 If the handler function is an opaque ptr object, it is a handler | |
| 366 that was established in C using call_with_condition_handler(), | |
| 367 and the contents of the object are a function pointer which takes | |
| 368 three arguments, the signal name and signal data (same arguments | |
| 369 passed to `signal') and a third Lisp_Object argument, specified | |
| 370 in the call to call_with_condition_handler() and stored as the | |
| 371 second element of the list containing the handler functionl. | |
| 372 | |
| 373 If the handler function is a regular Lisp_Object, it is a handler | |
| 374 that was established using `call-with-condition-handler'. | |
| 375 Currently there are no more arguments in the list containing the | |
| 376 handler function, and only one argument is passed to the handler | |
| 377 function: a cons of the signal name and signal data arguments | |
| 378 passed to `signal'. | |
| 379 | |
| 380 -- A list whose car is Qunbound and whose cdr is Qt. This is a | |
| 381 special condition-case handler established by C code with | |
| 382 condition_case_1(). All errors are trapped; the debugger is not | |
| 383 invoked even if `debug-on-error' was set. | |
| 384 | |
| 385 -- A list whose car is Qunbound and whose cdr is Qerror. This is a | |
| 386 special condition-case handler established by C code with | |
| 387 condition_case_1(). It is like Qt except that the debugger is | |
| 388 invoked normally if it is called for. | |
| 389 | |
| 390 -- A list whose car is Qunbound and whose cdr is a list of lists | |
| 391 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is | |
| 392 a normal `condition-case' handler. | |
| 393 | |
| 394 Note that in all cases *except* the first, there is a corresponding | |
| 395 catch, whose TAG is the value of Vcondition_handlers just after the | |
| 396 handler data just described is pushed onto it. The reason is that | |
| 397 `condition-case' handlers need to throw back to the place where the | |
| 398 handler was installed before invoking it, while | |
| 399 `call-with-condition-handler' handlers are invoked in the | |
| 400 environment that `signal' was invoked in. */ | |
| 401 | |
| 402 | |
| 428 | 403 static Lisp_Object Vcondition_handlers; |
| 404 | |
| 853 | 405 /* I think we should keep this enabled all the time, not just when |
| 406 error checking is enabled, because if one of these puppies pops up, | |
| 407 it will trash the stack if not caught, making it that much harder to | |
| 408 debug. It doesn't cause speed loss. */ | |
| 442 | 409 #define DEFEND_AGAINST_THROW_RECURSION |
| 410 | |
| 411 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 412 /* Used for error catching purposes by throw_or_bomb_out */ |
| 413 static int throw_level; | |
| 442 | 414 #endif |
| 415 | |
| 1123 | 416 static int warning_will_be_discarded (Lisp_Object level); |
| 2532 | 417 static Lisp_Object maybe_get_trapping_problems_backtrace (void); |
| 1123 | 418 |
| 428 | 419 |
| 420 /************************************************************************/ | |
| 421 /* The subr object type */ | |
| 422 /************************************************************************/ | |
| 423 | |
| 424 static void | |
| 2286 | 425 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag)) |
| 428 | 426 { |
| 427 Lisp_Subr *subr = XSUBR (obj); | |
| 867 | 428 const CIbyte *header = |
| 428 | 429 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr "; |
| 867 | 430 const CIbyte *name = subr_name (subr); |
| 431 const CIbyte *trailer = subr->prompt ? " (interactive)>" : ">"; | |
| 428 | 432 |
| 433 if (print_readably) | |
| 563 | 434 printing_unreadable_object ("%s%s%s", header, name, trailer); |
| 428 | 435 |
| 826 | 436 write_c_string (printcharfun, header); |
| 437 write_c_string (printcharfun, name); | |
| 438 write_c_string (printcharfun, trailer); | |
| 428 | 439 } |
| 440 | |
| 1204 | 441 static const struct memory_description subr_description[] = { |
| 2551 | 442 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 428 | 443 { XD_END } |
| 444 }; | |
| 445 | |
| 938 | 446 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr, |
| 447 1, /*dumpable-flag*/ | |
| 448 0, print_subr, 0, 0, 0, | |
| 449 subr_description, | |
| 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 */ | |
| 442 | 841 REGISTER Lisp_Object val; |
| 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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diff
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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 */ | |
| 442 | 873 REGISTER 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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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 | |
| 1256 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /* | |
| 3842 | 1257 Return the argument, without evaluating it. `(function x)' yields `x'. |
| 1258 | |
| 1259 `function' differs from `quote' in that it is a hint that an expression is | |
| 1260 a function, not data. In particular, under some circumstances the byte | |
| 1261 compiler will compile an expression quoted with `function', but it will | |
| 1262 never do so for an expression quoted with `quote'. However, the byte | |
| 1263 compiler will not compile an expression buried in a data structure such as | |
| 1264 a vector or a list which is not syntactically a function. These issues are | |
| 1265 most important for lambda expressions (see `lambda'). | |
| 1266 | |
| 1267 There is an alternative, more readable, reader syntax for `function': a Lisp | |
| 1268 object preceded by `#''. Thus, #'x is equivalent to (function x), in all | |
| 1269 contexts. A print function may use either. Internally the expression is | |
| 1270 represented as `(function x)'). | |
| 428 | 1271 */ |
| 1272 (args)) | |
| 1273 { | |
| 1274 return XCAR (args); | |
| 1275 } | |
| 1276 | |
| 1277 | |
| 1278 /************************************************************************/ | |
| 1279 /* Defining functions/variables */ | |
| 1280 /************************************************************************/ | |
| 1281 static Lisp_Object | |
| 1282 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1283 { | |
| 1284 Ffset (name, defn); | |
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1285 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1286 return name; |
| 1287 } | |
| 1288 | |
| 1289 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
| 1290 \(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function. | |
| 1291 The definition is (lambda ARGLIST [DOCSTRING] BODY...). | |
| 1292 See also the function `interactive'. | |
| 1293 */ | |
| 1294 (args)) | |
| 1295 { | |
| 1296 /* This function can GC */ | |
| 1297 return define_function (XCAR (args), | |
| 1298 Fcons (Qlambda, XCDR (args))); | |
| 1299 } | |
| 1300 | |
| 1301 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
| 1302 \(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro. | |
| 1303 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). | |
| 1304 When the macro is called, as in (NAME ARGS...), | |
| 1305 the function (lambda ARGLIST BODY...) is applied to | |
| 1306 the list ARGS... as it appears in the expression, | |
| 1307 and the result should be a form to be evaluated instead of the original. | |
| 1308 */ | |
| 1309 (args)) | |
| 1310 { | |
| 1311 /* This function can GC */ | |
| 1312 return define_function (XCAR (args), | |
| 1313 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1314 } | |
| 1315 | |
| 1316 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
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1317 Define SYMBOL as a variable. |
| 428 | 1318 You are not required to define a variable in order to use it, |
| 1319 but the definition can supply documentation and an initial value | |
| 1320 in a way that tags can recognize. | |
| 1321 | |
| 1322 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1323 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1324 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1325 void.) | |
| 1326 If SYMBOL is buffer-local, its default value is what is set; | |
| 1327 buffer-local values are not affected. | |
| 1328 INITVALUE and DOCSTRING are optional. | |
| 1329 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1330 This means that M-x set-variable recognizes it. |
| 428 | 1331 If INITVALUE is missing, SYMBOL's value is not set. |
| 1332 | |
| 1333 In lisp-interaction-mode defvar is treated as defconst. | |
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1334 |
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1335 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1336 */ |
| 1337 (args)) | |
| 1338 { | |
| 1339 /* This function can GC */ | |
| 1340 Lisp_Object sym = XCAR (args); | |
| 1341 | |
| 1342 if (!NILP (args = XCDR (args))) | |
| 1343 { | |
| 1344 Lisp_Object val = XCAR (args); | |
| 1345 | |
| 1346 if (NILP (Fdefault_boundp (sym))) | |
| 1347 { | |
| 1348 struct gcpro gcpro1; | |
| 1349 GCPRO1 (val); | |
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1350 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1351 Fset_default (sym, val); |
| 1352 UNGCPRO; | |
| 1353 } | |
| 1354 | |
| 1355 if (!NILP (args = XCDR (args))) | |
| 1356 { | |
| 1357 Lisp_Object doc = XCAR (args); | |
| 1358 Fput (sym, Qvariable_documentation, doc); | |
| 1359 if (!NILP (args = XCDR (args))) | |
| 563 | 1360 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1361 } |
| 1362 } | |
| 1363 | |
| 1364 #ifdef I18N3 | |
| 1365 if (!NILP (Vfile_domain)) | |
| 1366 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1367 #endif | |
| 1368 | |
| 1369 LOADHIST_ATTACH (sym); | |
| 1370 return sym; | |
| 1371 } | |
| 1372 | |
| 1373 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
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1374 Define SYMBOL as a constant variable. |
| 428 | 1375 The intent is that programs do not change this value, but users may. |
| 1376 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1377 If SYMBOL is buffer-local, its default value is what is set; | |
| 1378 buffer-local values are not affected. | |
| 1379 DOCSTRING is optional. | |
| 1380 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1381 This means that M-x set-variable recognizes it. |
| 428 | 1382 |
| 1383 Note: do not use `defconst' for user options in libraries that are not | |
| 1384 normally loaded, since it is useful for users to be able to specify | |
| 1385 their own values for such variables before loading the library. | |
| 1386 Since `defconst' unconditionally assigns the variable, | |
| 1387 it would override the user's choice. | |
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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 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1396 struct gcpro gcpro1; | |
| 1397 | |
| 1398 GCPRO1 (val); | |
| 1399 | |
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1400 val = IGNORE_MULTIPLE_VALUES (val); |
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1401 |
| 428 | 1402 Fset_default (sym, val); |
| 1403 | |
| 1404 UNGCPRO; | |
| 1405 | |
| 1406 if (!NILP (args = XCDR (args))) | |
| 1407 { | |
| 1408 Lisp_Object doc = XCAR (args); | |
| 1409 Fput (sym, Qvariable_documentation, doc); | |
| 1410 if (!NILP (args = XCDR (args))) | |
| 563 | 1411 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1412 } |
| 1413 | |
| 1414 #ifdef I18N3 | |
| 1415 if (!NILP (Vfile_domain)) | |
| 1416 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1417 #endif | |
| 1418 | |
| 1419 LOADHIST_ATTACH (sym); | |
| 1420 return sym; | |
| 1421 } | |
| 1422 | |
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1423 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
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|
1424 with the symbol variable aliases. */ |
| 428 | 1425 |
| 1426 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1427 Return result of expanding macros at top level of FORM. | |
| 1428 If FORM is not a macro call, it is returned unchanged. | |
| 1429 Otherwise, the macro is expanded and the expansion is considered | |
| 1430 in place of FORM. When a non-macro-call results, it is returned. | |
| 1431 | |
| 442 | 1432 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1433 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1434 */ | |
| 442 | 1435 (form, environment)) |
| 428 | 1436 { |
| 1437 /* This function can GC */ | |
| 1438 /* With cleanups from Hallvard Furuseth. */ | |
| 1439 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1440 | |
| 1441 while (1) | |
| 1442 { | |
| 1443 /* Come back here each time we expand a macro call, | |
| 1444 in case it expands into another macro call. */ | |
| 1445 if (!CONSP (form)) | |
| 1446 break; | |
| 1447 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1448 def = sym = XCAR (form); | |
| 1449 tem = Qnil; | |
| 1450 /* Trace symbols aliases to other symbols | |
| 1451 until we get a symbol that is not an alias. */ | |
| 1452 while (SYMBOLP (def)) | |
| 1453 { | |
| 1454 QUIT; | |
| 1455 sym = def; | |
| 442 | 1456 tem = Fassq (sym, environment); |
| 428 | 1457 if (NILP (tem)) |
| 1458 { | |
| 1459 def = XSYMBOL (sym)->function; | |
| 1460 if (!UNBOUNDP (def)) | |
| 1461 continue; | |
| 1462 } | |
| 1463 break; | |
| 1464 } | |
| 442 | 1465 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1466 and if TEM is nil then DEF is SYM's function definition. */ |
| 1467 if (NILP (tem)) | |
| 1468 { | |
| 442 | 1469 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1470 Look at its function definition. */ |
| 1471 if (UNBOUNDP (def) | |
| 1472 || !CONSP (def)) | |
| 1473 /* Not defined or definition not suitable */ | |
| 1474 break; | |
| 1475 if (EQ (XCAR (def), Qautoload)) | |
| 1476 { | |
| 1477 /* Autoloading function: will it be a macro when loaded? */ | |
| 1478 tem = Felt (def, make_int (4)); | |
| 1479 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1480 { | |
| 1481 /* Yes, load it and try again. */ | |
| 970 | 1482 /* do_autoload GCPROs both arguments */ |
| 428 | 1483 do_autoload (def, sym); |
| 1484 continue; | |
| 1485 } | |
| 1486 else | |
| 1487 break; | |
| 1488 } | |
| 1489 else if (!EQ (XCAR (def), Qmacro)) | |
| 1490 break; | |
| 1491 else expander = XCDR (def); | |
| 1492 } | |
| 1493 else | |
| 1494 { | |
| 1495 expander = XCDR (tem); | |
| 1496 if (NILP (expander)) | |
| 1497 break; | |
| 1498 } | |
| 1499 form = apply1 (expander, XCDR (form)); | |
| 1500 } | |
| 1501 return form; | |
| 1502 } | |
| 1503 | |
| 1504 | |
| 1505 /************************************************************************/ | |
| 1506 /* Non-local exits */ | |
| 1507 /************************************************************************/ | |
| 1508 | |
| 1318 | 1509 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1510 | |
| 1511 int | |
| 1512 proper_redisplay_wrapping_in_place (void) | |
| 1513 { | |
| 1514 return !in_display | |
| 1515 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1516 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1517 } | |
| 1518 | |
| 1519 static void | |
| 1520 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1521 { | |
| 1522 assert_with_message | |
| 1523 (proper_redisplay_wrapping_in_place (), | |
| 1524 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1525 } | |
| 1526 | |
| 1527 static void | |
| 1528 check_proper_critical_section_lisp_protection (void) | |
| 1529 { | |
| 1530 assert_with_message | |
| 1531 (proper_redisplay_wrapping_in_place (), | |
| 1532 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1533 } | |
| 1534 | |
| 1535 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1536 | |
| 428 | 1537 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
| 1538 \(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'. | |
| 1539 TAG is evalled to get the tag to use. Then the BODY is executed. | |
| 3577 | 1540 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1541 If no throw happens, `catch' returns the value of the last BODY form. |
| 1542 If a throw happens, it specifies the value to return from `catch'. | |
| 1543 */ | |
| 1544 (args)) | |
| 1545 { | |
| 1546 /* This function can GC */ | |
| 1547 Lisp_Object tag = Feval (XCAR (args)); | |
| 1548 Lisp_Object body = XCDR (args); | |
| 2532 | 1549 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1550 } |
| 1551 | |
| 1552 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1553 FUNC should return a Lisp_Object. | |
| 1554 This is how catches are done from within C code. */ | |
| 1555 | |
| 1556 Lisp_Object | |
| 1557 internal_catch (Lisp_Object tag, | |
| 1558 Lisp_Object (*func) (Lisp_Object arg), | |
| 1559 Lisp_Object arg, | |
| 853 | 1560 int * volatile threw, |
| 2532 | 1561 Lisp_Object * volatile thrown_tag, |
| 1562 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1563 { |
| 1564 /* This structure is made part of the chain `catchlist'. */ | |
| 1565 struct catchtag c; | |
| 1566 | |
| 1567 /* Fill in the components of c, and put it on the list. */ | |
| 1568 c.next = catchlist; | |
| 1569 c.tag = tag; | |
| 853 | 1570 c.actual_tag = Qnil; |
| 2532 | 1571 c.backtrace = Qnil; |
| 428 | 1572 c.val = Qnil; |
| 1573 c.backlist = backtrace_list; | |
| 1574 #if 0 /* FSFmacs */ | |
| 1575 /* #### */ | |
| 1576 c.handlerlist = handlerlist; | |
| 1577 #endif | |
| 1578 c.lisp_eval_depth = lisp_eval_depth; | |
| 1579 c.pdlcount = specpdl_depth(); | |
| 1580 #if 0 /* FSFmacs */ | |
| 1581 c.poll_suppress_count = async_timer_suppress_count; | |
| 1582 #endif | |
| 1583 c.gcpro = gcprolist; | |
| 1584 catchlist = &c; | |
| 1585 | |
| 1586 /* Call FUNC. */ | |
| 1587 if (SETJMP (c.jmp)) | |
| 1588 { | |
| 1589 /* Throw works by a longjmp that comes right here. */ | |
| 1590 if (threw) *threw = 1; | |
| 853 | 1591 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1592 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1593 return c.val; |
| 1594 } | |
| 1595 c.val = (*func) (arg); | |
| 1596 if (threw) *threw = 0; | |
| 853 | 1597 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1598 catchlist = c.next; |
| 853 | 1599 check_catchlist_sanity (); |
| 428 | 1600 return c.val; |
| 1601 } | |
| 1602 | |
| 1603 | |
| 1604 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1605 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1606 | |
| 2297 | 1607 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1608 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1609 condition-case form has a TAG of Qnil. |
| 1610 | |
| 1611 Before each catch is discarded, unbind all special bindings and | |
| 1612 execute all unwind-protect clauses made above that catch. Unwind | |
| 1613 the handler stack as we go, so that the proper handlers are in | |
| 1614 effect for each unwind-protect clause we run. At the end, restore | |
| 1615 some static info saved in CATCH, and longjmp to the location | |
| 1616 specified in the | |
| 1617 | |
| 1618 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1619 | |
| 2268 | 1620 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1621 Lisp_Object)); | |
| 1622 | |
| 1623 static DOESNT_RETURN | |
| 853 | 1624 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1625 { |
| 1626 REGISTER int last_time; | |
| 1627 | |
| 1628 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1629 Before each catch is discarded, unbind all special bindings | |
| 1630 and execute all unwind-protect clauses made above that catch. | |
| 1631 At the end, restore some static info saved in CATCH, | |
| 1632 and longjmp to the location specified. | |
| 1633 */ | |
| 1634 | |
| 1635 /* Save the value somewhere it will be GC'ed. | |
| 1636 (Can't overwrite tag slot because an unwind-protect may | |
| 1637 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1638 c->val = val; | |
| 853 | 1639 c->actual_tag = tag; |
| 428 | 1640 |
| 1641 #if 0 /* FSFmacs */ | |
| 1642 /* Restore the polling-suppression count. */ | |
| 1643 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1644 #endif | |
| 1645 | |
| 617 | 1646 #if 1 |
| 428 | 1647 do |
| 1648 { | |
| 1649 last_time = catchlist == c; | |
| 1650 | |
| 1651 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1652 handlers. */ | |
| 771 | 1653 unbind_to (catchlist->pdlcount); |
| 428 | 1654 catchlist = catchlist->next; |
| 853 | 1655 check_catchlist_sanity (); |
| 428 | 1656 } |
| 1657 while (! last_time); | |
| 617 | 1658 #else |
| 1659 /* Former XEmacs code. This is definitely not as correct because | |
| 1660 there may be a number of catches we're unwinding, and a number | |
| 1661 of unwind-protects in the process. By not undoing the catches till | |
| 1662 the end, there may be invalid catches still current. (This would | |
| 1663 be a particular problem with code like this: | |
| 1664 | |
| 1665 (catch 'foo | |
| 1666 (call-some-code-which-does... | |
| 1667 (catch 'bar | |
| 1668 (unwind-protect | |
| 1669 (call-some-code-which-does... | |
| 1670 (catch 'bar | |
| 1671 (call-some-code-which-does... | |
| 1672 (throw 'foo nil)))) | |
| 1673 (throw 'bar nil))))) | |
| 1674 | |
| 1675 This would try to throw to the inner (catch 'bar)! | |
| 1676 | |
| 1677 --ben | |
| 1678 */ | |
| 428 | 1679 /* Unwind the specpdl stack */ |
| 771 | 1680 unbind_to (c->pdlcount); |
| 428 | 1681 catchlist = c->next; |
| 853 | 1682 check_catchlist_sanity (); |
| 617 | 1683 #endif /* Former code */ |
| 428 | 1684 |
| 1204 | 1685 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1686 if (profiling_active) |
| 1687 { | |
| 1688 while (backtrace_list != c->backlist) | |
| 1689 { | |
| 1690 profile_record_unwind (backtrace_list); | |
| 1691 backtrace_list = backtrace_list->next; | |
| 1692 } | |
| 1693 } | |
| 1694 else | |
| 1695 backtrace_list = c->backlist; | |
| 428 | 1696 lisp_eval_depth = c->lisp_eval_depth; |
| 1697 | |
| 442 | 1698 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1699 throw_level = 0; |
| 1700 #endif | |
| 1701 LONGJMP (c->jmp, 1); | |
| 1702 } | |
| 1703 | |
|
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1704 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
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1705 Lisp_Object, Lisp_Object)); |
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1706 |
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1707 DOESNT_RETURN |
| 428 | 1708 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
| 1709 Lisp_Object sig, Lisp_Object data) | |
| 1710 { | |
| 442 | 1711 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1712 /* die if we recurse more than is reasonable */ |
| 1713 if (++throw_level > 20) | |
| 2500 | 1714 ABORT (); |
| 428 | 1715 #endif |
| 1716 | |
| 1318 | 1717 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 1718 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 1719 #endif |
| 1123 | 1720 |
| 428 | 1721 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1722 "last resort" when there is no handler for this error and | |
| 1723 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1724 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1725 initialization stages) we would get in an infinite recursive |
| 1726 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1727 really-early-error-handler. | |
| 1728 | |
| 1729 Note that in fact the only time that the "last resort" | |
| 3025 | 1730 occurs is when there's no catch for `top-level' -- the |
| 1731 `top-level' catch and the catch-all error handler are | |
| 428 | 1732 established at the same time, in initial_command_loop/ |
| 1733 top_level_1. | |
| 1734 | |
| 853 | 1735 [[#### Fix this horrifitude!]] |
| 1736 | |
| 1737 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1738 */ |
| 1739 | |
| 1740 while (1) | |
| 1741 { | |
| 1742 REGISTER struct catchtag *c; | |
| 1743 | |
| 1744 #if 0 /* FSFmacs */ | |
| 1745 if (!NILP (tag)) /* #### */ | |
| 1746 #endif | |
| 1747 for (c = catchlist; c; c = c->next) | |
| 1748 { | |
| 2532 | 1749 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1750 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1751 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1752 unwind_to_catch (c, val, tag); | |
| 428 | 1753 } |
| 1754 if (!bomb_out_p) | |
| 1755 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1756 else | |
| 1757 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1758 } | |
| 1759 } | |
| 1760 | |
| 1761 /* See above, where CATCHLIST is defined, for a description of how | |
| 1762 Fthrow() works. | |
| 1763 | |
| 1764 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1765 back to the appropriate condition-case handler after (maybe) | |
| 1766 the debugger is entered. In that case, TAG is the value | |
| 1767 of Vcondition_handlers that was in place just after the | |
| 1768 condition-case handler was set up. The car of this will be | |
| 1769 some data referring to the handler: Its car will be Qunbound | |
| 1770 (thus, this tag can never be generated by Lisp code), and | |
| 1771 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1772 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1773 This works fine because Fthrow() does not care what TAG was | |
| 1774 passed to it: it just looks up the catch list for something | |
| 1775 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1776 back to the place that established the catch (in this case, | |
| 1777 condition_case_1). See below for more info. | |
| 1778 */ | |
| 1779 | |
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parents:
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1780 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1781 Throw to the catch for TAG and return VALUE from it. |
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parents:
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1782 |
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parents:
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1783 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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Support full Common Lisp multiple values in C.
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parents:
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1784 back. Tags are the same if and only if they are `eq'. |
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Support full Common Lisp multiple values in C.
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parents:
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1785 |
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parents:
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1786 arguments: (TAG VALUE) |
| 428 | 1787 */ |
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1788 (args)) |
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parents:
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1789 { |
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parents:
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1790 int nargs; |
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1791 Lisp_Object tag, value; |
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1792 |
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1793 GET_LIST_LENGTH (args, nargs); |
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1794 if (nargs != 2) |
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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1795 { |
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1796 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1797 } |
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parents:
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1798 |
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1799 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1800 |
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1801 value = Feval (XCAR (XCDR (args))); |
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1802 |
| 444 | 1803 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1804 RETURN_NOT_REACHED (Qnil); |
| 428 | 1805 } |
| 1806 | |
| 1807 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1808 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1809 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...). | |
| 1810 If BODYFORM completes normally, its value is returned | |
| 1811 after executing the UNWINDFORMS. | |
| 1812 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
| 1813 */ | |
| 1814 (args)) | |
| 1815 { | |
| 1816 /* This function can GC */ | |
| 1817 int speccount = specpdl_depth(); | |
| 1818 | |
| 1819 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1820 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1821 } |
| 1822 | |
| 1823 | |
| 1824 /************************************************************************/ | |
| 1292 | 1825 /* Trapping errors */ |
| 428 | 1826 /************************************************************************/ |
| 1827 | |
| 1828 static Lisp_Object | |
| 1829 condition_bind_unwind (Lisp_Object loser) | |
| 1830 { | |
| 617 | 1831 /* There is no problem freeing stuff here like there is in |
| 1832 condition_case_unwind(), because there are no outside pointers | |
| 1833 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1834 |
| 428 | 1835 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1836 Lisp_Object tem = XCAR (loser); | |
| 853 | 1837 int first = 1; |
| 428 | 1838 |
| 1839 while (CONSP (tem)) | |
| 1840 { | |
| 853 | 1841 Lisp_Object victim = tem; |
| 1842 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1843 free_opaque_ptr (XCAR (victim)); | |
| 1844 first = 0; | |
| 1845 tem = XCDR (victim); | |
| 428 | 1846 free_cons (victim); |
| 1847 } | |
| 1848 | |
| 1849 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1850 Vcondition_handlers = XCDR (loser); |
| 1851 | |
| 1852 free_cons (loser); | |
| 428 | 1853 return Qnil; |
| 1854 } | |
| 1855 | |
| 1856 static Lisp_Object | |
| 1857 condition_case_unwind (Lisp_Object loser) | |
| 1858 { | |
| 1859 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1860 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1861 catch. With the recent changes to unwind_to_catch(), the | |
| 1862 evil situation might not happen any more; it certainly could | |
| 1863 happen before because it did. But it's very precarious to rely | |
| 1864 on something like this. #### Instead we should rewrite, adopting | |
| 1865 the FSF's mechanism with a struct handler instead of | |
| 1866 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1867 to hold all of the values, and there's no possibility either of | |
| 1868 crashes from freeing objects too quickly, or objects not getting | |
| 1869 freed and hanging around till the next GC. | |
| 1870 | |
| 1871 In practice, the extra consing here should not matter because | |
| 1872 it only happens when we throw past the condition-case, which almost | |
| 1873 always is the result of an error. Most of the time, there will be | |
| 1874 no error, and we will free the objects below in the main function. | |
| 1875 | |
| 1876 --ben | |
| 1877 | |
| 1878 DO NOT DO: free_cons (XCAR (loser)); | |
| 1879 */ | |
| 1880 | |
| 428 | 1881 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1882 Vcondition_handlers = XCDR (loser); |
| 1883 | |
| 1884 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1885 return Qnil; |
| 1886 } | |
| 1887 | |
| 1888 /* Split out from condition_case_3 so that primitive C callers | |
| 1889 don't have to cons up a lisp handler form to be evaluated. */ | |
| 1890 | |
| 1891 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 1892 specified by HANDLERS. If no error occurs that is indicated by | |
| 1893 HANDLERS as something to be caught, the return value of this | |
| 1894 function is the return value from BFUN. If such an error does | |
| 1895 occur, HFUN is called, and its return value becomes the | |
| 1896 return value of condition_case_1(). The second argument passed | |
| 1897 to HFUN will always be HARG. The first argument depends on | |
| 1898 HANDLERS: | |
| 1899 | |
| 1900 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 1901 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 1902 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 1903 arguments passed to `signal'. The debugger is not invoked even if | |
| 1904 `debug-on-error' was set. | |
| 1905 | |
| 1906 A HANDLERS value of Qerror is the same as Qt except that the | |
| 1907 debugger is invoked if `debug-on-error' was set. | |
| 1908 | |
| 1909 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 1910 exactly as in `condition-case', and errors will be trapped | |
| 1911 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 1912 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 1913 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 1914 | |
| 1915 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 1916 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 1917 for why), establishes a catch whose tag is this new value of | |
| 1918 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 1919 it calls Fthrow(), setting TAG to this same new value of | |
| 1920 Vcondition_handlers and setting VAL to the same thing that will | |
| 1921 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 1922 jump point we just established, and we in turn just call the | |
| 1923 HFUN and return its value. | |
| 1924 | |
| 1925 For a real condition-case, HFUN will always be | |
| 1926 run_condition_case_handlers() and HARG is the argument VAR | |
| 1927 to condition-case. That function just binds VAR to the cons | |
| 1928 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 1929 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 1930 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 1931 it had *before* condition_case_1() was called. This maintains | |
| 1932 consistency (so that the state of things at exit of | |
| 1933 condition_case_1() is the same as at entry), and implies | |
| 1934 that the handler can signal the same error again (possibly | |
| 1935 after processing of its own), without getting in an infinite | |
| 1936 loop. */ | |
| 1937 | |
| 1938 Lisp_Object | |
| 1939 condition_case_1 (Lisp_Object handlers, | |
| 1940 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 1941 Lisp_Object barg, | |
| 1942 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 1943 Lisp_Object harg) | |
| 1944 { | |
| 1945 int speccount = specpdl_depth(); | |
| 1946 struct catchtag c; | |
| 617 | 1947 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 1948 |
| 1949 #if 0 /* FSFmacs */ | |
| 1950 c.tag = Qnil; | |
| 1951 #else | |
| 1952 /* Do consing now so out-of-memory error happens up front */ | |
| 1953 /* (unbound . stuff) is a special condition-case kludge marker | |
| 1954 which is known specially by Fsignal. | |
| 617 | 1955 [[ This is an abomination, but to fix it would require either |
| 428 | 1956 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 1957 or changing the byte-compiler output (no thanks).]] |
| 1958 | |
| 1959 The above comment is clearly wrong. FSF does not do it this way | |
| 1960 and did not change the byte-compiler output. Instead they use a | |
| 1961 `struct handler' to hold the various values (in place of our | |
| 1962 Vcondition_handlers) and chain them together, with pointers from | |
| 1963 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 1964 consider moving to something similar, but not before I merge my | |
| 1965 stderr-proc workspace, which contains changes to these | |
| 1966 functions. --ben */ | |
| 428 | 1967 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 1968 Vcondition_handlers); | |
| 1969 #endif | |
| 1970 c.val = Qnil; | |
| 853 | 1971 c.actual_tag = Qnil; |
| 2532 | 1972 c.backtrace = Qnil; |
| 428 | 1973 c.backlist = backtrace_list; |
| 1974 #if 0 /* FSFmacs */ | |
| 1975 /* #### */ | |
| 1976 c.handlerlist = handlerlist; | |
| 1977 #endif | |
| 1978 c.lisp_eval_depth = lisp_eval_depth; | |
| 1979 c.pdlcount = specpdl_depth(); | |
| 1980 #if 0 /* FSFmacs */ | |
| 1981 c.poll_suppress_count = async_timer_suppress_count; | |
| 1982 #endif | |
| 1983 c.gcpro = gcprolist; | |
| 1984 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 1985 c.next = catchlist; | |
| 1986 | |
| 1987 if (SETJMP (c.jmp)) | |
| 1988 { | |
| 1989 /* throw does ungcpro, etc */ | |
| 1990 return (*hfun) (c.val, harg); | |
| 1991 } | |
| 1992 | |
| 1993 record_unwind_protect (condition_case_unwind, c.tag); | |
| 1994 | |
| 1995 catchlist = &c; | |
| 1996 #if 0 /* FSFmacs */ | |
| 1997 h.handler = handlers; | |
| 1998 h.var = Qnil; | |
| 1999 h.next = handlerlist; | |
| 2000 h.tag = &c; | |
| 2001 handlerlist = &h; | |
| 2002 #else | |
| 2003 Vcondition_handlers = c.tag; | |
| 2004 #endif | |
| 2005 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2006 c.val = ((*bfun) (barg)); | |
| 2007 UNGCPRO; | |
| 617 | 2008 |
| 2009 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2010 GCPRO3 (harg, c.val, c.tag); | |
| 2011 | |
| 428 | 2012 catchlist = c.next; |
| 853 | 2013 check_catchlist_sanity (); |
| 617 | 2014 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2015 delete this here. */ | |
| 428 | 2016 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2017 unbind_to (speccount); |
| 617 | 2018 |
| 2019 UNGCPRO; | |
| 2020 /* free the conses *after* the unbind, because the unbind will run | |
| 2021 condition_case_unwind above. */ | |
| 853 | 2022 free_cons (XCAR (c.tag)); |
| 2023 free_cons (c.tag); | |
| 617 | 2024 return c.val; |
| 428 | 2025 } |
| 2026 | |
| 2027 static Lisp_Object | |
| 2028 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2029 { | |
| 2030 /* This function can GC */ | |
| 2031 #if 0 /* FSFmacs */ | |
| 2032 if (!NILP (h.var)) | |
| 2033 specbind (h.var, c.val); | |
| 2034 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2035 | |
| 2036 /* Note that this just undoes the binding of h.var; whoever | |
| 2037 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2038 throwing. */ | |
| 771 | 2039 unbind_to (c.pdlcount); |
| 428 | 2040 return val; |
| 2041 #else | |
| 2042 int speccount; | |
| 2043 | |
| 2044 CHECK_TRUE_LIST (val); | |
| 2045 if (NILP (var)) | |
| 2046 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2047 | |
| 2048 speccount = specpdl_depth(); | |
| 2049 specbind (var, Fcar (val)); | |
| 2050 val = Fprogn (Fcdr (val)); | |
| 771 | 2051 return unbind_to_1 (speccount, val); |
| 428 | 2052 #endif |
| 2053 } | |
| 2054 | |
| 2055 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2056 condition-case except that it takes three arguments rather | |
| 2057 than a single list of arguments. */ | |
| 2058 Lisp_Object | |
| 2059 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2060 { | |
| 2061 /* This function can GC */ | |
| 2062 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2063 { | |
| 2064 if (NILP (handler)) | |
| 2065 ; | |
| 2066 else if (CONSP (handler)) | |
| 2067 { | |
| 2068 Lisp_Object conditions = XCAR (handler); | |
| 2069 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2070 if (SYMBOLP (conditions)) | |
| 2071 ; | |
| 2072 else | |
| 2073 { | |
| 2074 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2075 if (!SYMBOLP (condition)) | |
| 2076 goto invalid_condition_handler; | |
| 2077 } | |
| 2078 } | |
| 2079 else | |
| 2080 { | |
| 2081 invalid_condition_handler: | |
| 563 | 2082 sferror ("Invalid condition handler", handler); |
| 428 | 2083 } |
| 2084 } | |
| 2085 | |
| 2086 CHECK_SYMBOL (var); | |
| 2087 | |
| 2088 return condition_case_1 (handlers, | |
| 2089 Feval, bodyform, | |
| 2090 run_condition_case_handlers, | |
| 2091 var); | |
| 2092 } | |
| 2093 | |
| 2094 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2095 Regain control when an error is signalled. | |
| 2096 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2097 Executes BODYFORM and returns its value if no error happens. | |
| 2098 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2099 where the BODY is made of Lisp expressions. | |
| 2100 | |
| 771 | 2101 A typical usage of `condition-case' looks like this: |
| 2102 | |
| 2103 (condition-case nil | |
| 2104 ;; you need a progn here if you want more than one statement ... | |
| 2105 (progn | |
| 2106 (do-something) | |
| 2107 (do-something-else)) | |
| 2108 (error | |
| 2109 (issue-warning-or) | |
| 2110 ;; but strangely, you don't need one here. | |
| 2111 (return-a-value-etc) | |
| 2112 )) | |
| 2113 | |
| 428 | 2114 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2115 error's condition names. If an error happens, the first applicable | |
| 2116 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2117 all errors, even those without the `error' condition name on them | |
| 2118 \(e.g. `quit'). | |
| 2119 | |
| 2120 The car of a handler may be a list of condition names | |
| 2121 instead of a single condition name. | |
| 2122 | |
| 2123 When a handler handles an error, | |
| 2124 control returns to the condition-case and the handler BODY... is executed | |
| 2125 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2126 VAR may be nil; then you do not get access to the signal information. | |
| 2127 | |
| 2128 The value of the last BODY form is returned from the condition-case. | |
| 2129 See also the function `signal' for more info. | |
| 2130 | |
| 2131 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2132 and the current catches, condition-cases, and bindings have all been | |
| 2133 popped back to the state they were in just before the call to | |
| 2134 `condition-case'. This means that resignalling the error from | |
| 2135 within the handler will not result in an infinite loop. | |
| 2136 | |
| 2137 If you want to establish an error handler that is called with the | |
| 2138 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2139 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2140 */ | |
| 2141 (args)) | |
| 2142 { | |
| 2143 /* This function can GC */ | |
| 2144 Lisp_Object var = XCAR (args); | |
| 2145 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2146 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2147 return condition_case_3 (bodyform, var, handlers); | |
| 2148 } | |
| 2149 | |
| 2150 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
| 2151 Regain control when an error is signalled, without popping the stack. | |
| 2152 Usage looks like (call-with-condition-handler HANDLER FUNCTION &rest ARGS). | |
| 2153 This function is similar to `condition-case', but the handler is invoked | |
| 2154 with the same environment (Lisp stack, bindings, catches, condition-cases) | |
| 2155 that was current when `signal' was called, rather than when the handler | |
| 2156 was established. | |
| 2157 | |
| 2158 HANDLER should be a function of one argument, which is a cons of the args | |
| 2159 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2160 `signal' is called (this differs from `condition-case', which allows | |
| 2161 you to specify which errors are trapped). If the handler function | |
| 2162 returns, `signal' continues as if the handler were never invoked. | |
| 2163 \(It continues to look for handlers established earlier than this one, | |
| 2164 and invokes the standard error-handler if none is found.) | |
| 2165 */ | |
| 2166 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2167 { | |
| 2168 /* This function can GC */ | |
| 2169 int speccount = specpdl_depth(); | |
| 2170 Lisp_Object tem; | |
| 2171 | |
| 853 | 2172 tem = Ffunction_max_args (args[0]); |
| 2173 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2174 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2175 invalid_argument ("Must be function of one argument", args[0]); | |
| 2176 | |
| 2177 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2178 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2179 record_unwind_protect (condition_bind_unwind, tem); | |
| 2180 Vcondition_handlers = tem; | |
| 2181 | |
| 2182 /* Caller should have GC-protected args */ | |
| 771 | 2183 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2184 } |
| 2185 | |
| 853 | 2186 /* This is the C version of the above function. It calls FUN, passing it |
| 2187 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2188 which they were signalled. (HANDLER is only invoked if there was no | |
| 2189 handler (either from condition-case or call-with-condition-handler) set | |
| 2190 later on that handled the signal; therefore, this is a real error. | |
| 2191 | |
| 2192 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2193 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2194 ARG be void * to facilitate passing structures, but I changed to | |
| 2195 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2196 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2197 to convert between Lisp_Objects and structure pointers. */ | |
| 2198 | |
| 2199 Lisp_Object | |
| 2200 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2201 Lisp_Object), | |
| 2202 Lisp_Object handler_arg, | |
| 2203 Lisp_Object (*fun) (Lisp_Object), | |
| 2204 Lisp_Object arg) | |
| 2205 { | |
| 2206 /* This function can GC */ | |
| 1111 | 2207 int speccount = specpdl_depth (); |
| 853 | 2208 Lisp_Object tem; |
| 2209 | |
| 2210 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2211 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2212 noseeum_cons (handler_arg, Qnil)), |
| 2213 Vcondition_handlers); | |
| 2214 record_unwind_protect (condition_bind_unwind, tem); | |
| 2215 Vcondition_handlers = tem; | |
| 2216 | |
| 2217 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2218 } | |
| 2219 | |
| 428 | 2220 static int |
| 2221 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2222 { | |
| 2223 if (EQ (type, Qt)) | |
| 2224 /* (condition-case c # (t c)) catches -all- signals | |
| 2225 * Use with caution! */ | |
| 2226 return 1; | |
| 2227 | |
| 2228 if (SYMBOLP (type)) | |
| 2229 return !NILP (Fmemq (type, conditions)); | |
| 2230 | |
| 2231 for (; CONSP (type); type = XCDR (type)) | |
| 2232 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2233 return 1; | |
| 2234 | |
| 2235 return 0; | |
| 2236 } | |
| 2237 | |
| 2238 static Lisp_Object | |
| 2239 return_from_signal (Lisp_Object value) | |
| 2240 { | |
| 2241 #if 1 | |
| 2242 /* Most callers are not prepared to handle gc if this | |
| 2243 returns. So, since this feature is not very useful, | |
| 2244 take it out. */ | |
| 2245 /* Have called debugger; return value to signaller */ | |
| 2246 return value; | |
| 2247 #else /* But the reality is that that stinks, because: */ | |
| 2248 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2249 to be continuable!! */ | |
| 563 | 2250 signal_error (Qunimplemented, |
| 2251 "Returning a value from an error is no longer supported", | |
| 2252 Qunbound); | |
| 428 | 2253 #endif |
| 2254 } | |
| 2255 | |
| 2256 | |
| 2257 /************************************************************************/ | |
| 2258 /* the workhorse error-signaling function */ | |
| 2259 /************************************************************************/ | |
| 2260 | |
| 853 | 2261 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2262 that won't get signalled for errors occurring when | |
| 2263 call_with_suspended_errors() was invoked. */ | |
| 2264 | |
| 872 | 2265 /* Don't make static or it might be compiled away */ |
| 2266 void signal_1 (void); | |
| 2267 | |
| 2268 void | |
| 853 | 2269 signal_1 (void) |
| 2270 { | |
| 2271 } | |
| 2272 | |
| 428 | 2273 /* #### This function has not been synched with FSF. It diverges |
| 2274 significantly. */ | |
| 2275 | |
| 853 | 2276 /* The simplest external error function: it would be called |
| 2277 signal_continuable_error() in the terminology below, but it's | |
| 2278 Lisp-callable. */ | |
| 2279 | |
| 2280 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2281 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2282 An error symbol is a symbol defined using `define-error'. | |
| 2283 DATA should be a list. Its elements are printed as part of the error message. | |
| 2284 If the signal is handled, DATA is made available to the handler. | |
| 2285 See also the function `signal-error', and the functions to handle errors: | |
| 2286 `condition-case' and `call-with-condition-handler'. | |
| 2287 | |
| 2288 Note that this function can return, if the debugger is invoked and the | |
| 2289 user invokes the "return from signal" option. | |
| 2290 */ | |
| 2291 (error_symbol, data)) | |
| 428 | 2292 { |
| 2293 /* This function can GC */ | |
| 853 | 2294 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2295 Lisp_Object conditions = Qnil; | |
| 2296 Lisp_Object handlers = Qnil; | |
| 428 | 2297 /* signal_call_debugger() could get called more than once |
| 2298 (once when a call-with-condition-handler is about to | |
| 2299 be dealt with, and another when a condition-case handler | |
| 2300 is about to be invoked). So make sure the debugger and/or | |
| 2301 stack trace aren't done more than once. */ | |
| 2302 int stack_trace_displayed = 0; | |
| 2303 int debugger_entered = 0; | |
| 853 | 2304 |
| 2305 /* Fsignal() is one of these functions that's called all the time | |
| 2306 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2307 protect the objects because all sorts of weird stuff could | |
| 2308 happen. */ | |
| 2309 | |
| 2310 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2311 | |
| 2312 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2313 signal_1 (); | |
| 428 | 2314 |
| 2315 if (!initialized) | |
| 2316 { | |
| 2317 /* who knows how much has been initialized? Safest bet is | |
| 2318 just to bomb out immediately. */ | |
| 771 | 2319 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2320 ABORT (); |
| 428 | 2321 } |
| 2322 | |
| 3092 | 2323 #ifndef NEW_GC |
| 1123 | 2324 assert (!gc_in_progress); |
| 3092 | 2325 #endif /* not NEW_GC */ |
| 1123 | 2326 |
| 2327 /* We abort if in_display and we are not protected, as garbage | |
| 2328 collections and non-local exits will invariably be fatal, but in | |
| 2329 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2330 */ | |
| 2331 | |
| 1318 | 2332 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2333 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2334 #endif |
| 428 | 2335 |
| 853 | 2336 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2337 |
| 2338 for (handlers = Vcondition_handlers; | |
| 2339 CONSP (handlers); | |
| 2340 handlers = XCDR (handlers)) | |
| 2341 { | |
| 2342 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2343 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2344 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2345 | |
| 2346 if (!UNBOUNDP (handler_fun)) | |
| 2347 { | |
| 2348 /* call-with-condition-handler */ | |
| 2349 Lisp_Object tem; | |
| 2350 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2351 struct gcpro ngcpro1; | |
| 2352 NGCPRO1 (all_handlers); | |
| 2353 Vcondition_handlers = outer_handlers; | |
| 2354 | |
| 853 | 2355 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2356 outer_handlers, 1, |
| 2357 &stack_trace_displayed, | |
| 2358 &debugger_entered); | |
| 2359 if (!UNBOUNDP (tem)) | |
| 2360 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2361 | |
| 853 | 2362 if (OPAQUE_PTRP (handler_fun)) |
| 2363 { | |
| 2364 if (NILP (handler_data)) | |
| 2365 { | |
| 2366 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2367 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2368 (get_opaque_ptr (handler_fun)); | |
| 2369 | |
| 2370 tem = (*hfun) (error_symbol, data); | |
| 2371 } | |
| 2372 else | |
| 2373 { | |
| 2374 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2375 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2376 (get_opaque_ptr (handler_fun)); | |
| 2377 | |
| 2378 assert (NILP (XCDR (handler_data))); | |
| 2379 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2380 } | |
| 2381 } | |
| 2382 else | |
| 2383 { | |
| 2384 tem = Fcons (error_symbol, data); | |
| 2385 if (NILP (handler_data)) | |
| 2386 tem = call1 (handler_fun, tem); | |
| 2387 else | |
| 2388 { | |
| 2389 /* (This code won't be used (for now?).) */ | |
| 2390 struct gcpro nngcpro1; | |
| 2391 Lisp_Object args[3]; | |
| 2392 NNGCPRO1 (args[0]); | |
| 2393 nngcpro1.nvars = 3; | |
| 2394 args[0] = handler_fun; | |
| 2395 args[1] = tem; | |
| 2396 args[2] = handler_data; | |
| 2397 nngcpro1.var = args; | |
| 2398 tem = Fapply (3, args); | |
| 2399 NNUNGCPRO; | |
| 2400 } | |
| 2401 } | |
| 428 | 2402 NUNGCPRO; |
| 2403 #if 0 | |
| 2404 if (!EQ (tem, Qsignal)) | |
| 2405 return return_from_signal (tem); | |
| 2406 #endif | |
| 2407 /* If handler didn't throw, try another handler */ | |
| 2408 Vcondition_handlers = all_handlers; | |
| 2409 } | |
| 2410 | |
| 2411 /* It's a condition-case handler */ | |
| 2412 | |
| 2413 /* t is used by handlers for all conditions, set up by C code. | |
| 2414 * debugger is not called even if debug_on_error */ | |
| 2415 else if (EQ (handler_data, Qt)) | |
| 2416 { | |
| 2417 UNGCPRO; | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2418 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
|
2419 0, Qnil, Qnil); |
| 428 | 2420 } |
| 2421 /* `error' is used similarly to the way `t' is used, but in | |
| 2422 addition it invokes the debugger if debug_on_error. | |
| 2423 This is normally used for the outer command-loop error | |
| 2424 handler. */ | |
| 2425 else if (EQ (handler_data, Qerror)) | |
| 2426 { | |
| 853 | 2427 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2428 data, | |
| 428 | 2429 outer_handlers, 0, |
| 2430 &stack_trace_displayed, | |
| 2431 &debugger_entered); | |
| 2432 | |
| 2433 UNGCPRO; | |
| 2434 if (!UNBOUNDP (tem)) | |
| 2435 return return_from_signal (tem); | |
| 2436 | |
| 853 | 2437 tem = Fcons (error_symbol, data); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2438 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2439 } |
| 2440 else | |
| 2441 { | |
| 2442 /* handler established by real (Lisp) condition-case */ | |
| 2443 Lisp_Object h; | |
| 2444 | |
| 2445 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2446 { | |
| 2447 Lisp_Object clause = Fcar (h); | |
| 2448 Lisp_Object tem = Fcar (clause); | |
| 2449 | |
| 2450 if (condition_type_p (tem, conditions)) | |
| 2451 { | |
| 853 | 2452 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2453 outer_handlers, 1, |
| 2454 &stack_trace_displayed, | |
| 2455 &debugger_entered); | |
| 2456 UNGCPRO; | |
| 2457 if (!UNBOUNDP (tem)) | |
| 2458 return return_from_signal (tem); | |
| 2459 | |
| 2460 /* Doesn't return */ | |
| 853 | 2461 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
|
2462 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2463 } |
| 2464 } | |
| 2465 } | |
| 2466 } | |
| 2467 | |
| 2468 /* If no handler is present now, try to run the debugger, | |
| 2469 and if that fails, throw to top level. | |
| 2470 | |
| 2471 #### The only time that no handler is present is during | |
| 2472 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2473 there is no `top-level' catch. (That's why the |
| 428 | 2474 "bomb-out" hack was added.) |
| 2475 | |
| 853 | 2476 [[#### Fix this horrifitude!]] |
| 2477 | |
| 2478 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2479 | |
| 2480 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2481 &stack_trace_displayed, |
| 2482 &debugger_entered); | |
| 2483 UNGCPRO; | |
| 853 | 2484 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2485 data); /* Doesn't return */ | |
| 2268 | 2486 RETURN_NOT_REACHED (Qnil); |
| 428 | 2487 } |
| 2488 | |
| 2489 /****************** Error functions class 1 ******************/ | |
| 2490 | |
| 2491 /* Class 1: General functions that signal an error. | |
| 2492 These functions take an error type and a list of associated error | |
| 2493 data. */ | |
| 2494 | |
| 853 | 2495 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2496 |
| 2497 /* Signal a non-continuable error. */ | |
| 2498 | |
| 2499 DOESNT_RETURN | |
| 563 | 2500 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2501 { |
| 2502 for (;;) | |
| 2503 Fsignal (sig, data); | |
| 2504 } | |
| 853 | 2505 |
| 2506 #ifdef ERROR_CHECK_CATCH | |
| 2507 | |
| 2508 void | |
| 2509 check_catchlist_sanity (void) | |
| 2510 { | |
| 2511 #if 0 | |
| 2512 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2513 bug! */ | |
| 442 | 2514 struct catchtag *c; |
| 2515 int found_error_tag = 0; | |
| 2516 | |
| 2517 for (c = catchlist; c; c = c->next) | |
| 2518 { | |
| 2519 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2520 { | |
| 2521 found_error_tag = 1; | |
| 2522 break; | |
| 2523 } | |
| 2524 } | |
| 2525 | |
| 2526 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2527 #endif /* vou me tomar no cul */ |
| 2528 } | |
| 2529 | |
| 2530 void | |
| 2531 check_specbind_stack_sanity (void) | |
| 2532 { | |
| 2533 } | |
| 2534 | |
| 2535 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2536 |
| 2537 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2538 according to ERRB. CLASS is the class of warning and should | |
| 2539 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2540 Qresource, etc.). */ | |
| 2541 | |
| 2542 void | |
| 1204 | 2543 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2544 Error_Behavior errb) |
| 428 | 2545 { |
| 2546 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2547 return; | |
| 793 | 2548 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2549 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2550 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2551 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2552 else |
| 2553 for (;;) | |
| 2554 Fsignal (sig, data); | |
| 2555 } | |
| 2556 | |
| 2557 /* Signal a continuable error or display a warning or do nothing, | |
| 2558 according to ERRB. */ | |
| 2559 | |
| 2560 Lisp_Object | |
| 563 | 2561 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2562 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2563 { |
| 2564 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2565 return Qnil; | |
| 793 | 2566 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2567 { | |
| 1204 | 2568 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2569 return Qnil; |
| 2570 } | |
| 428 | 2571 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2572 { | |
| 1204 | 2573 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2574 return Qnil; |
| 2575 } | |
| 2576 else | |
| 2577 return Fsignal (sig, data); | |
| 2578 } | |
| 2579 | |
| 2580 | |
| 2581 /****************** Error functions class 2 ******************/ | |
| 2582 | |
| 563 | 2583 /* Class 2: Signal an error with a string and an associated object. |
| 2584 Normally these functions are used to attach one associated object, | |
| 2585 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2586 than one object, make a list of the objects with Qunbound as the | |
| 2587 first element. (If you have specifically two objects to attach, | |
| 2588 consider using the function in class 3 below.) These functions | |
| 2589 signal an error of a specified type, whose data is one or more | |
| 2590 objects (usually two), a string the related Lisp object(s) | |
| 2591 specified as FROB. */ | |
| 2592 | |
| 2593 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2594 to signal_error_1(). */ | |
| 2595 | |
| 2596 Lisp_Object | |
| 867 | 2597 build_error_data (const CIbyte *reason, Lisp_Object frob) |
| 563 | 2598 { |
| 2599 if (EQ (frob, Qunbound)) | |
| 2600 frob = Qnil; | |
| 2601 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2602 frob = XCDR (frob); | |
| 2603 else | |
| 2604 frob = list1 (frob); | |
| 2605 if (!reason) | |
| 2606 return frob; | |
| 2607 else | |
| 771 | 2608 return Fcons (build_msg_string (reason), frob); |
| 563 | 2609 } |
| 2610 | |
| 2611 DOESNT_RETURN | |
| 867 | 2612 signal_error (Lisp_Object type, const CIbyte *reason, Lisp_Object frob) |
| 563 | 2613 { |
| 2614 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2615 } | |
| 2616 | |
| 2617 void | |
| 867 | 2618 maybe_signal_error (Lisp_Object type, const CIbyte *reason, |
| 1204 | 2619 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2620 Error_Behavior errb) |
| 563 | 2621 { |
| 2622 /* Optimization: */ | |
| 2623 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2624 return; | |
| 1204 | 2625 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2626 } |
| 2627 | |
| 2628 Lisp_Object | |
| 867 | 2629 signal_continuable_error (Lisp_Object type, const CIbyte *reason, |
| 563 | 2630 Lisp_Object frob) |
| 2631 { | |
| 2632 return Fsignal (type, build_error_data (reason, frob)); | |
| 2633 } | |
| 2634 | |
| 2635 Lisp_Object | |
| 867 | 2636 maybe_signal_continuable_error (Lisp_Object type, const CIbyte *reason, |
| 1204 | 2637 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2638 Error_Behavior errb) |
| 563 | 2639 { |
| 2640 /* Optimization: */ | |
| 2641 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2642 return Qnil; | |
| 2643 return maybe_signal_continuable_error_1 (type, | |
| 2644 build_error_data (reason, frob), | |
| 1204 | 2645 class_, errb); |
| 563 | 2646 } |
| 2647 | |
| 2648 | |
| 2649 /****************** Error functions class 3 ******************/ | |
| 2650 | |
| 2651 /* Class 3: Signal an error with a string and two associated objects. | |
| 2652 These functions signal an error of a specified type, whose data | |
| 2653 is three objects, a string and two related Lisp objects. | |
| 2654 (The equivalent could be accomplished using the class 2 functions, | |
| 2655 but these are more convenient in this particular case.) */ | |
| 2656 | |
| 2657 DOESNT_RETURN | |
| 867 | 2658 signal_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2659 Lisp_Object frob0, Lisp_Object frob1) |
| 2660 { | |
| 771 | 2661 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2662 frob1)); |
| 2663 } | |
| 2664 | |
| 2665 void | |
| 867 | 2666 maybe_signal_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2667 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2668 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2669 { |
| 2670 /* Optimization: */ | |
| 2671 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2672 return; | |
| 771 | 2673 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2674 frob1), class_, errb); |
| 563 | 2675 } |
| 2676 | |
| 2677 Lisp_Object | |
| 867 | 2678 signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2679 Lisp_Object frob0, Lisp_Object frob1) |
| 2680 { | |
| 771 | 2681 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2682 frob1)); |
| 2683 } | |
| 2684 | |
| 2685 Lisp_Object | |
| 867 | 2686 maybe_signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2687 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2688 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2689 { |
| 2690 /* Optimization: */ | |
| 2691 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2692 return Qnil; | |
| 2693 return maybe_signal_continuable_error_1 | |
| 771 | 2694 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2695 class_, errb); |
| 563 | 2696 } |
| 2697 | |
| 2698 | |
| 2699 /****************** Error functions class 4 ******************/ | |
| 2700 | |
| 2701 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2702 These functions signal an error of a specified type, whose data |
| 428 | 2703 is a single string, created using the arguments. */ |
| 2704 | |
| 2705 DOESNT_RETURN | |
| 867 | 2706 signal_ferror (Lisp_Object type, const CIbyte *fmt, ...) |
| 442 | 2707 { |
| 2708 Lisp_Object obj; | |
| 2709 va_list args; | |
| 2710 | |
| 2711 va_start (args, fmt); | |
| 771 | 2712 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2713 va_end (args); |
| 2714 | |
| 2715 /* Fsignal GC-protects its args */ | |
| 563 | 2716 signal_error (type, 0, obj); |
| 442 | 2717 } |
| 2718 | |
| 2719 void | |
| 1204 | 2720 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
| 867 | 2721 const CIbyte *fmt, ...) |
| 442 | 2722 { |
| 2723 Lisp_Object obj; | |
| 2724 va_list args; | |
| 2725 | |
| 2726 /* Optimization: */ | |
| 2727 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2728 return; | |
| 2729 | |
| 2730 va_start (args, fmt); | |
| 771 | 2731 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2732 va_end (args); |
| 2733 | |
| 2734 /* Fsignal GC-protects its args */ | |
| 1204 | 2735 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2736 } |
| 2737 | |
| 2738 Lisp_Object | |
| 867 | 2739 signal_continuable_ferror (Lisp_Object type, const CIbyte *fmt, ...) |
| 428 | 2740 { |
| 2741 Lisp_Object obj; | |
| 2742 va_list args; | |
| 2743 | |
| 2744 va_start (args, fmt); | |
| 771 | 2745 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2746 va_end (args); |
| 2747 | |
| 2748 /* Fsignal GC-protects its args */ | |
| 2749 return Fsignal (type, list1 (obj)); | |
| 2750 } | |
| 2751 | |
| 2752 Lisp_Object | |
| 1204 | 2753 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
| 867 | 2754 Error_Behavior errb, const CIbyte *fmt, ...) |
| 442 | 2755 { |
| 2756 Lisp_Object obj; | |
| 2757 va_list args; | |
| 2758 | |
| 2759 /* Optimization: */ | |
| 2760 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2761 return Qnil; | |
| 2762 | |
| 2763 va_start (args, fmt); | |
| 771 | 2764 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2765 va_end (args); |
| 2766 | |
| 2767 /* Fsignal GC-protects its args */ | |
| 1204 | 2768 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2769 } |
| 2770 | |
| 2771 | |
| 2772 /****************** Error functions class 5 ******************/ | |
| 2773 | |
| 563 | 2774 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2775 These functions signal an error of a specified type, whose data |
| 563 | 2776 is a one or more objects, a string (created using the arguments) |
| 2777 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2778 is the same as for class 2.) | |
| 2779 | |
| 2780 There is no need for a class 6 because you can always attach 2 | |
| 2781 objects using class 5 (for FROB, specify a list with three | |
| 2782 elements, the first of which is Qunbound), and these functions are | |
| 2783 not commonly used. | |
| 2784 */ | |
| 442 | 2785 |
| 2786 DOESNT_RETURN | |
| 867 | 2787 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const CIbyte *fmt, |
| 563 | 2788 ...) |
| 442 | 2789 { |
| 2790 Lisp_Object obj; | |
| 2791 va_list args; | |
| 2792 | |
| 2793 va_start (args, fmt); | |
| 771 | 2794 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2795 va_end (args); |
| 2796 | |
| 2797 /* Fsignal GC-protects its args */ | |
| 563 | 2798 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2799 } |
| 2800 | |
| 2801 void | |
| 563 | 2802 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2803 Lisp_Object class_, Error_Behavior errb, |
| 867 | 2804 const CIbyte *fmt, ...) |
| 442 | 2805 { |
| 2806 Lisp_Object obj; | |
| 2807 va_list args; | |
| 2808 | |
| 2809 /* Optimization: */ | |
| 2810 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2811 return; | |
| 2812 | |
| 2813 va_start (args, fmt); | |
| 771 | 2814 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2815 va_end (args); |
| 2816 | |
| 2817 /* Fsignal GC-protects its args */ | |
| 1204 | 2818 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2819 errb); |
| 428 | 2820 } |
| 2821 | |
| 2822 Lisp_Object | |
| 563 | 2823 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 867 | 2824 const CIbyte *fmt, ...) |
| 428 | 2825 { |
| 2826 Lisp_Object obj; | |
| 2827 va_list args; | |
| 2828 | |
| 2829 va_start (args, fmt); | |
| 771 | 2830 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2831 va_end (args); |
| 2832 | |
| 2833 /* Fsignal GC-protects its args */ | |
| 563 | 2834 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2835 } |
| 2836 | |
| 2837 Lisp_Object | |
| 563 | 2838 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2839 Lisp_Object class_, |
| 578 | 2840 Error_Behavior errb, |
| 867 | 2841 const CIbyte *fmt, ...) |
| 428 | 2842 { |
| 2843 Lisp_Object obj; | |
| 2844 va_list args; | |
| 2845 | |
| 2846 /* Optimization: */ | |
| 2847 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2848 return Qnil; | |
| 2849 | |
| 2850 va_start (args, fmt); | |
| 771 | 2851 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2852 va_end (args); |
| 2853 | |
| 2854 /* Fsignal GC-protects its args */ | |
| 563 | 2855 return maybe_signal_continuable_error_1 (type, |
| 2856 Fcons (obj, | |
| 2857 build_error_data (0, frob)), | |
| 1204 | 2858 class_, errb); |
| 428 | 2859 } |
| 2860 | |
| 2861 | |
| 2862 /* This is what the QUIT macro calls to signal a quit */ | |
| 2863 void | |
| 2864 signal_quit (void) | |
| 2865 { | |
| 853 | 2866 /* This function cannot GC. GC is prohibited because most callers do |
| 2867 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2868 --ben */ | |
| 2869 | |
| 2870 int count; | |
| 2871 | |
| 428 | 2872 if (EQ (Vquit_flag, Qcritical)) |
| 2873 debug_on_quit |= 2; /* set critical bit. */ | |
| 2874 Vquit_flag = Qnil; | |
| 853 | 2875 count = begin_gc_forbidden (); |
| 428 | 2876 /* note that this is continuable. */ |
| 2877 Fsignal (Qquit, Qnil); | |
| 853 | 2878 unbind_to (count); |
| 428 | 2879 } |
| 2880 | |
| 2881 | |
| 563 | 2882 /************************ convenience error functions ***********************/ |
| 2883 | |
| 436 | 2884 Lisp_Object |
| 428 | 2885 signal_void_function_error (Lisp_Object function) |
| 2886 { | |
| 436 | 2887 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 2888 } |
| 2889 | |
| 436 | 2890 Lisp_Object |
| 428 | 2891 signal_invalid_function_error (Lisp_Object function) |
| 2892 { | |
| 436 | 2893 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 2894 } |
| 2895 | |
| 436 | 2896 Lisp_Object |
| 428 | 2897 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 2898 { | |
| 436 | 2899 return Fsignal (Qwrong_number_of_arguments, |
| 2900 list2 (function, make_int (nargs))); | |
| 428 | 2901 } |
| 2902 | |
| 2903 /* Used in list traversal macros for efficiency. */ | |
| 436 | 2904 DOESNT_RETURN |
| 428 | 2905 signal_malformed_list_error (Lisp_Object list) |
| 2906 { | |
| 563 | 2907 signal_error (Qmalformed_list, 0, list); |
| 428 | 2908 } |
| 2909 | |
| 436 | 2910 DOESNT_RETURN |
| 428 | 2911 signal_malformed_property_list_error (Lisp_Object list) |
| 2912 { | |
| 563 | 2913 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 2914 } |
| 2915 | |
| 436 | 2916 DOESNT_RETURN |
| 428 | 2917 signal_circular_list_error (Lisp_Object list) |
| 2918 { | |
| 563 | 2919 signal_error (Qcircular_list, 0, list); |
| 428 | 2920 } |
| 2921 | |
| 436 | 2922 DOESNT_RETURN |
| 428 | 2923 signal_circular_property_list_error (Lisp_Object list) |
| 2924 { | |
| 563 | 2925 signal_error (Qcircular_property_list, 0, list); |
| 428 | 2926 } |
| 442 | 2927 |
| 2267 | 2928 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 2929 DOESNT_RETURN |
| 867 | 2930 syntax_error (const CIbyte *reason, Lisp_Object frob) |
| 442 | 2931 { |
| 563 | 2932 signal_error (Qsyntax_error, reason, frob); |
| 442 | 2933 } |
| 2934 | |
| 2935 DOESNT_RETURN | |
| 867 | 2936 syntax_error_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 2937 { |
| 563 | 2938 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 2939 } | |
| 2940 | |
| 2941 void | |
| 867 | 2942 maybe_syntax_error (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 2943 Lisp_Object class_, Error_Behavior errb) |
| 2944 { | |
| 2945 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 2946 } |
| 2947 | |
| 2948 DOESNT_RETURN | |
| 867 | 2949 sferror (const CIbyte *reason, Lisp_Object frob) |
| 563 | 2950 { |
| 2951 signal_error (Qstructure_formation_error, reason, frob); | |
| 2952 } | |
| 2953 | |
| 2954 DOESNT_RETURN | |
| 867 | 2955 sferror_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 2956 { |
| 2957 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 2958 } | |
| 2959 | |
| 2960 void | |
| 867 | 2961 maybe_sferror (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 2962 Lisp_Object class_, Error_Behavior errb) |
| 2963 { | |
| 2964 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 2965 } |
| 2966 | |
| 2967 DOESNT_RETURN | |
| 867 | 2968 invalid_argument (const CIbyte *reason, Lisp_Object frob) |
| 442 | 2969 { |
| 563 | 2970 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 2971 } |
| 2972 | |
| 2973 DOESNT_RETURN | |
| 867 | 2974 invalid_argument_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 2975 Lisp_Object frob2) |
| 442 | 2976 { |
| 563 | 2977 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 2978 } | |
| 2979 | |
| 2980 void | |
| 867 | 2981 maybe_invalid_argument (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 2982 Lisp_Object class_, Error_Behavior errb) |
| 2983 { | |
| 2984 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 2985 } |
| 2986 | |
| 2987 DOESNT_RETURN | |
| 867 | 2988 invalid_constant (const CIbyte *reason, Lisp_Object frob) |
| 563 | 2989 { |
| 2990 signal_error (Qinvalid_constant, reason, frob); | |
| 2991 } | |
| 2992 | |
| 2993 DOESNT_RETURN | |
| 867 | 2994 invalid_constant_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 2995 Lisp_Object frob2) |
| 563 | 2996 { |
| 2997 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 2998 } | |
| 2999 | |
| 3000 void | |
| 867 | 3001 maybe_invalid_constant (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3002 Lisp_Object class_, Error_Behavior errb) |
| 3003 { | |
| 3004 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3005 } |
| 3006 | |
| 3007 DOESNT_RETURN | |
| 867 | 3008 invalid_operation (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3009 { |
| 563 | 3010 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3011 } |
| 3012 | |
| 3013 DOESNT_RETURN | |
| 867 | 3014 invalid_operation_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 3015 Lisp_Object frob2) |
| 442 | 3016 { |
| 563 | 3017 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3018 } | |
| 3019 | |
| 3020 void | |
| 867 | 3021 maybe_invalid_operation (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3022 Lisp_Object class_, Error_Behavior errb) |
| 3023 { | |
| 3024 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3025 } |
| 3026 | |
| 3027 DOESNT_RETURN | |
| 867 | 3028 invalid_change (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3029 { |
| 563 | 3030 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3031 } |
| 3032 | |
| 3033 DOESNT_RETURN | |
| 867 | 3034 invalid_change_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3035 { |
| 563 | 3036 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3037 } | |
| 3038 | |
| 3039 void | |
| 867 | 3040 maybe_invalid_change (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3041 Lisp_Object class_, Error_Behavior errb) |
| 3042 { | |
| 3043 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3044 } |
| 3045 | |
| 3046 DOESNT_RETURN | |
| 867 | 3047 invalid_state (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3048 { |
| 3049 signal_error (Qinvalid_state, reason, frob); | |
| 3050 } | |
| 3051 | |
| 3052 DOESNT_RETURN | |
| 867 | 3053 invalid_state_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3054 { |
| 3055 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3056 } | |
| 3057 | |
| 3058 void | |
| 867 | 3059 maybe_invalid_state (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3060 Lisp_Object class_, Error_Behavior errb) |
| 3061 { | |
| 3062 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3063 } |
| 3064 | |
| 3065 DOESNT_RETURN | |
| 867 | 3066 wtaerror (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3067 { |
| 3068 signal_error (Qwrong_type_argument, reason, frob); | |
| 3069 } | |
| 3070 | |
| 3071 DOESNT_RETURN | |
| 867 | 3072 stack_overflow (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3073 { |
| 3074 signal_error (Qstack_overflow, reason, frob); | |
| 3075 } | |
| 3076 | |
| 3077 DOESNT_RETURN | |
| 867 | 3078 out_of_memory (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3079 { |
| 3080 signal_error (Qout_of_memory, reason, frob); | |
| 3081 } | |
| 3082 | |
| 3083 DOESNT_RETURN | |
| 867 | 3084 printing_unreadable_object (const CIbyte *fmt, ...) |
| 563 | 3085 { |
| 3086 Lisp_Object obj; | |
| 3087 va_list args; | |
| 3088 | |
| 3089 va_start (args, fmt); | |
| 771 | 3090 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 563 | 3091 va_end (args); |
| 3092 | |
| 3093 /* Fsignal GC-protects its args */ | |
| 3094 signal_error (Qprinting_unreadable_object, 0, obj); | |
| 442 | 3095 } |
| 3096 | |
| 428 | 3097 |
| 3098 /************************************************************************/ | |
| 3099 /* User commands */ | |
| 3100 /************************************************************************/ | |
| 3101 | |
| 3102 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3103 Return t if FUNCTION makes provisions for interactive calling. | |
| 3104 This means it contains a description for how to read arguments to give it. | |
| 3105 The value is nil for an invalid function or a symbol with no function | |
| 3106 definition. | |
| 3107 | |
| 3108 Interactively callable functions include | |
| 3109 | |
| 3110 -- strings and vectors (treated as keyboard macros) | |
| 3111 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3112 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3113 (i.e. the interactive flag) | |
| 3114 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3115 value | |
| 3116 -- subrs (built-in functions) that are interactively callable | |
| 3117 | |
| 3118 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3119 */ | |
| 3120 (function)) | |
| 3121 { | |
| 3122 Lisp_Object fun = indirect_function (function, 0); | |
| 3123 | |
| 3124 if (COMPILED_FUNCTIONP (fun)) | |
| 3125 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3126 | |
| 3127 /* Lists may represent commands. */ | |
| 3128 if (CONSP (fun)) | |
| 3129 { | |
| 3130 Lisp_Object funcar = XCAR (fun); | |
| 3131 if (EQ (funcar, Qlambda)) | |
| 3132 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3133 if (EQ (funcar, Qautoload)) | |
| 3134 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3135 else | |
| 3136 return Qnil; | |
| 3137 } | |
| 3138 | |
| 3139 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3140 interactive spec. */ | |
| 3141 if (SUBRP (fun)) | |
| 3142 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3143 | |
| 3144 /* Strings and vectors are keyboard macros. */ | |
| 3145 if (VECTORP (fun) || STRINGP (fun)) | |
| 3146 return Qt; | |
| 3147 | |
| 3148 /* Everything else (including Qunbound) is not a command. */ | |
| 3149 return Qnil; | |
| 3150 } | |
| 3151 | |
| 3152 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3153 Execute CMD as an editor command. | |
| 3154 CMD must be an object that satisfies the `commandp' predicate. | |
| 3155 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3156 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3157 when reading the arguments. | |
| 3158 */ | |
| 444 | 3159 (cmd, record_flag, keys)) |
| 428 | 3160 { |
| 3161 /* This function can GC */ | |
| 3162 Lisp_Object prefixarg; | |
| 3163 Lisp_Object final = cmd; | |
| 4162 | 3164 PROFILE_DECLARE(); |
| 428 | 3165 struct console *con = XCONSOLE (Vselected_console); |
| 3166 | |
| 3167 prefixarg = con->prefix_arg; | |
| 3168 con->prefix_arg = Qnil; | |
| 3169 Vcurrent_prefix_arg = prefixarg; | |
| 3170 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3171 | |
| 3172 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3173 return run_hook (Qdisabled_command_hook); |
| 428 | 3174 |
| 3175 for (;;) | |
| 3176 { | |
| 3177 final = indirect_function (cmd, 1); | |
| 3178 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3179 { |
| 3180 /* do_autoload GCPROs both arguments */ | |
| 3181 do_autoload (final, cmd); | |
| 3182 } | |
| 428 | 3183 else |
| 3184 break; | |
| 3185 } | |
| 3186 | |
| 3187 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3188 { | |
| 3189 backtrace.function = &Qcall_interactively; | |
| 3190 backtrace.args = &cmd; | |
| 3191 backtrace.nargs = 1; | |
| 3192 backtrace.evalargs = 0; | |
| 1292 | 3193 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3194 backtrace.debug_on_exit = 0; |
| 1292 | 3195 backtrace.function_being_called = 0; |
| 428 | 3196 PUSH_BACKTRACE (backtrace); |
| 3197 | |
| 1292 | 3198 PROFILE_ENTER_FUNCTION (); |
| 444 | 3199 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3200 PROFILE_EXIT_FUNCTION (); |
| 428 | 3201 |
| 3202 POP_BACKTRACE (backtrace); | |
| 3203 return final; | |
| 3204 } | |
| 3205 else if (STRINGP (final) || VECTORP (final)) | |
| 3206 { | |
| 3207 return Fexecute_kbd_macro (final, prefixarg); | |
| 3208 } | |
| 3209 else | |
| 3210 { | |
| 3211 Fsignal (Qwrong_type_argument, | |
| 3212 Fcons (Qcommandp, | |
| 3213 (EQ (cmd, final) | |
| 3214 ? list1 (cmd) | |
| 3215 : list2 (cmd, final)))); | |
| 3216 return Qnil; | |
| 3217 } | |
| 3218 } | |
| 3219 | |
| 3220 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3221 Return t if function in which this appears was called interactively. | |
| 3222 This means that the function was called with call-interactively (which | |
| 3223 includes being called as the binding of a key) | |
| 3224 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3225 */ | |
| 3226 ()) | |
| 3227 { | |
| 3228 REGISTER struct backtrace *btp; | |
| 3229 REGISTER Lisp_Object fun; | |
| 3230 | |
| 3231 if (!INTERACTIVE) | |
| 3232 return Qnil; | |
| 3233 | |
| 3234 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3235 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3236 function). Note that *btp->function may be a symbol pointing at a | |
| 3237 compiled function. */ | |
| 3238 btp = backtrace_list; | |
| 3239 | |
| 3240 #if 0 /* FSFmacs */ | |
| 3241 | |
| 3242 /* #### FSFmacs does the following instead. I can't figure | |
| 3243 out which one is more correct. */ | |
| 3244 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3245 the top for Finteractive_p itself. If so, skip it. */ | |
| 3246 fun = Findirect_function (*btp->function); | |
| 3247 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3248 btp = btp->next; | |
| 3249 | |
| 3250 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3251 may be a frame for Fbyte_code. Now, given the strictest | |
| 3252 definition, this function isn't really being called | |
| 3253 interactively, but because that's the way Emacs 18 always builds | |
| 3254 byte-compiled functions, we'll accept it for now. */ | |
| 3255 if (EQ (*btp->function, Qbyte_code)) | |
| 3256 btp = btp->next; | |
| 3257 | |
| 3258 /* If this isn't a byte-compiled function, then we may now be | |
| 3259 looking at several frames for special forms. Skip past them. */ | |
| 3260 while (btp && | |
| 3261 btp->nargs == UNEVALLED) | |
| 3262 btp = btp->next; | |
| 3263 | |
| 3264 #else | |
| 3265 | |
| 3266 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3267 btp = btp->next; | |
| 3268 for (; | |
| 3269 btp && (btp->nargs == UNEVALLED | |
| 3270 || EQ (*btp->function, Qbyte_code)); | |
| 3271 btp = btp->next) | |
| 3272 {} | |
| 3273 /* btp now points at the frame of the innermost function | |
| 3274 that DOES eval its args. | |
| 3275 If it is a built-in function (such as load or eval-region) | |
| 3276 return nil. */ | |
| 3277 /* Beats me why this is necessary, but it is */ | |
| 3278 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3279 return Qt; | |
| 3280 | |
| 3281 #endif | |
| 3282 | |
| 3283 fun = Findirect_function (*btp->function); | |
| 3284 if (SUBRP (fun)) | |
| 3285 return Qnil; | |
| 3286 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3287 Return t if that function was called interactively. */ | |
| 3288 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3289 return Qt; | |
| 3290 return Qnil; | |
| 3291 } | |
| 3292 | |
| 3293 | |
| 3294 /************************************************************************/ | |
| 3295 /* Autoloading */ | |
| 3296 /************************************************************************/ | |
| 3297 | |
| 3298 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3299 Define FUNCTION to autoload from FILENAME. |
| 3300 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3301 The remaining optional arguments provide additional info about the | |
| 3302 real definition. | |
| 3303 DOCSTRING is documentation for FUNCTION. | |
| 3304 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3305 TYPE indicates the type of the object: | |
| 428 | 3306 nil or omitted says FUNCTION is a function, |
| 3307 `keymap' says FUNCTION is really a keymap, and | |
| 3308 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3309 If FUNCTION already has a non-void function definition that is not an |
| 3310 autoload object, this function does nothing and returns nil. | |
| 428 | 3311 */ |
| 444 | 3312 (function, filename, docstring, interactive, type)) |
| 428 | 3313 { |
| 3314 /* This function can GC */ | |
| 3315 CHECK_SYMBOL (function); | |
| 444 | 3316 CHECK_STRING (filename); |
| 428 | 3317 |
| 3318 /* If function is defined and not as an autoload, don't override */ | |
| 3319 { | |
| 3320 Lisp_Object f = XSYMBOL (function)->function; | |
| 3321 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3322 return Qnil; | |
| 3323 } | |
| 3324 | |
| 3325 if (purify_flag) | |
| 3326 { | |
| 3327 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3328 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3329 } |
| 440 | 3330 |
| 444 | 3331 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3332 docstring, |
| 3333 interactive, | |
| 3334 type))); | |
| 3335 } | |
| 3336 | |
| 3337 Lisp_Object | |
| 3338 un_autoload (Lisp_Object oldqueue) | |
| 3339 { | |
| 3340 /* This function can GC */ | |
| 3341 REGISTER Lisp_Object queue, first, second; | |
| 3342 | |
| 3343 /* Queue to unwind is current value of Vautoload_queue. | |
| 3344 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3345 queue = Vautoload_queue; | |
| 3346 Vautoload_queue = oldqueue; | |
| 3347 while (CONSP (queue)) | |
| 3348 { | |
| 3349 first = XCAR (queue); | |
| 3350 second = Fcdr (first); | |
| 3351 first = Fcar (first); | |
| 3352 if (NILP (second)) | |
| 3353 Vfeatures = first; | |
| 3354 else | |
| 3355 Ffset (first, second); | |
| 3356 queue = Fcdr (queue); | |
| 3357 } | |
| 3358 return Qnil; | |
| 3359 } | |
| 3360 | |
| 970 | 3361 /* do_autoload GCPROs both arguments */ |
| 428 | 3362 void |
| 3363 do_autoload (Lisp_Object fundef, | |
| 3364 Lisp_Object funname) | |
| 3365 { | |
| 3366 /* This function can GC */ | |
| 3367 int speccount = specpdl_depth(); | |
| 3368 Lisp_Object fun = funname; | |
| 970 | 3369 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3370 |
| 3371 CHECK_SYMBOL (funname); | |
| 970 | 3372 GCPRO3 (fundef, funname, fun); |
| 428 | 3373 |
| 3374 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3375 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3376 Vautoload_queue = Qt; | |
| 3377 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3378 | |
| 3379 { | |
| 3380 Lisp_Object queue; | |
| 3381 | |
| 3382 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3383 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3384 { | |
| 3385 Lisp_Object first = XCAR (queue); | |
| 3386 Lisp_Object second = Fcdr (first); | |
| 3387 | |
| 3388 first = Fcar (first); | |
| 3389 | |
| 3390 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3391 may be an atom if the autoload entry was generated by a defalias | |
| 3392 or fset. */ | |
| 3393 if (CONSP (second)) | |
| 3394 Fput (first, Qautoload, (XCDR (second))); | |
| 3395 } | |
| 3396 } | |
| 3397 | |
| 3398 /* Once loading finishes, don't undo it. */ | |
| 3399 Vautoload_queue = Qt; | |
| 771 | 3400 unbind_to (speccount); |
| 428 | 3401 |
| 3402 fun = indirect_function (fun, 0); | |
| 3403 | |
| 3404 #if 0 /* FSFmacs */ | |
| 3405 if (!NILP (Fequal (fun, fundef))) | |
| 3406 #else | |
| 3407 if (UNBOUNDP (fun) | |
| 3408 || (CONSP (fun) | |
| 3409 && EQ (XCAR (fun), Qautoload))) | |
| 3410 #endif | |
| 563 | 3411 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3412 UNGCPRO; |
| 3413 } | |
| 3414 | |
| 3415 | |
| 3416 /************************************************************************/ | |
| 3417 /* eval, funcall, apply */ | |
| 3418 /************************************************************************/ | |
| 3419 | |
| 814 | 3420 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3421 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3422 -- in particular, the calling of subrs and compiled functions, the most | |
| 3423 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3424 to do to squeeze more speed out except by switching to lexical | |
| 3425 variables, which would eliminate the specbind loop. (But the real gain | |
| 3426 from lexical variables would come from better optimization -- with | |
| 3427 dynamic binding, you have the constant problem that any function call | |
| 3428 that you haven't explicitly proven to be side-effect-free might | |
| 3429 potentially side effect your local variables, which makes optimization | |
| 3430 extremely difficult when there are function calls anywhere in a chunk of | |
| 3431 code to be optimized. Even worse, you don't know that *your* local | |
| 3432 variables aren't side-effecting an outer function's local variables, so | |
| 3433 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3434 | |
| 428 | 3435 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3436 int nargs, Lisp_Object args[]); |
| 428 | 3437 static int in_warnings; |
| 3438 | |
| 3439 | |
| 814 | 3440 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3441 int nargs, | |
| 3442 Lisp_Object args[]); | |
| 3443 | |
| 3444 /* The theory behind making this a separate function is to shrink | |
| 3445 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3446 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3447 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3448 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3449 | |
| 3450 void | |
| 3451 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3452 Lisp_Object args[]) | |
| 3453 { | |
| 3454 REGISTER int i = 0; | |
| 3455 int max_non_rest_args = f->args_in_array - 1; | |
| 3456 int bindargs = min (nargs, max_non_rest_args); | |
| 3457 | |
| 3458 for (i = 0; i < bindargs; i++) | |
| 3092 | 3459 #ifdef NEW_GC |
| 3460 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3461 args[i]); | |
| 3462 #else /* not NEW_GC */ | |
| 814 | 3463 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3464 #endif /* not NEW_GC */ |
| 814 | 3465 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3466 #ifdef NEW_GC |
| 3467 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3468 Qnil); | |
| 3469 #else /* not NEW_GC */ | |
| 814 | 3470 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3471 #endif /* not NEW_GC */ |
| 3472 #ifdef NEW_GC | |
| 3473 SPECBIND_FAST_UNSAFE | |
| 3474 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3475 nargs > max_non_rest_args ? | |
| 3476 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3477 Qnil); | |
| 3478 #else /* not NEW_GC */ | |
| 814 | 3479 SPECBIND_FAST_UNSAFE |
| 3480 (f->args[max_non_rest_args], | |
| 3481 nargs > max_non_rest_args ? | |
| 3482 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3483 Qnil); | |
| 3092 | 3484 #endif /* not NEW_GC */ |
| 814 | 3485 } |
| 3486 | |
| 3487 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3488 in ARGS, and return the result of evaluation. */ | |
| 3489 inline static Lisp_Object | |
| 3490 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3491 { | |
| 3492 /* This function can GC */ | |
| 3493 int speccount = specpdl_depth(); | |
| 3494 REGISTER int i = 0; | |
| 3495 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3496 | |
| 3497 if (!OPAQUEP (f->instructions)) | |
| 3498 /* Lazily munge the instructions into a more efficient form */ | |
| 3499 optimize_compiled_function (fun); | |
| 3500 | |
| 3501 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3502 the required space on the specbinding stack for binding the args | |
| 3503 and local variables of fun. So just reserve it once. */ | |
| 3504 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3505 | |
| 3506 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3507 optional arguments. */ | |
| 3508 { | |
| 3509 #if 1 | |
| 3510 for (i = 0; i < nargs; i++) | |
| 3092 | 3511 #ifdef NEW_GC |
| 3512 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3513 args[i]); | |
| 3514 #else /* not NEW_GC */ | |
| 814 | 3515 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3516 #endif /* not NEW_GC */ |
| 814 | 3517 #else |
| 3518 /* Here's an alternate way to write the loop that tries to further | |
| 3519 optimize funcalls for functions with few arguments by partially | |
| 3520 unrolling the loop. It's not clear whether this is a win since it | |
| 3521 increases the size of the function and the possibility of L1 cache | |
| 3522 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3523 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3524 compiler repeatedly and looking at the total time, show very | |
| 3525 little difference between the simple loop above, the unrolled code | |
| 3526 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3527 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3528 because it's smaller. */ | |
| 3529 switch (nargs) | |
| 3530 { | |
| 3531 default: | |
| 3532 for (i = nargs - 1; i >= 4; i--) | |
| 3533 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3534 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3535 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3536 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3537 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3538 case 0: break; | |
| 3539 } | |
| 3540 #endif | |
| 3541 } | |
| 3542 else if (nargs < f->min_args) | |
| 3543 goto wrong_number_of_arguments; | |
| 3544 else if (nargs < f->max_args) | |
| 3545 { | |
| 3546 for (i = 0; i < nargs; i++) | |
| 3092 | 3547 #ifdef NEW_GC |
| 3548 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3549 args[i]); | |
| 3550 #else /* not NEW_GC */ | |
| 814 | 3551 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3552 #endif /* not NEW_GC */ |
| 814 | 3553 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3554 #ifdef NEW_GC |
| 3555 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3556 Qnil); | |
| 3557 #else /* not NEW_GC */ | |
| 814 | 3558 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3559 #endif /* not NEW_GC */ |
| 814 | 3560 } |
| 3561 else if (f->max_args == MANY) | |
| 3562 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3563 else | |
| 3564 { | |
| 3565 wrong_number_of_arguments: | |
| 3566 /* The actual printed compiled_function object is incomprehensible. | |
| 3567 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3568 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3569 fun = *backtrace_list->function; | |
| 3570 return Fsignal (Qwrong_number_of_arguments, | |
| 3571 list2 (fun, make_int (nargs))); | |
| 3572 } | |
| 3573 | |
| 3574 { | |
| 3575 Lisp_Object value = | |
| 3576 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions), | |
| 3577 f->stack_depth, | |
| 3578 XVECTOR_DATA (f->constants)); | |
| 3579 | |
| 3580 /* The attempt to optimize this by only unbinding variables failed | |
| 3581 because using buffer-local variables as function parameters | |
| 3582 leads to specpdl_ptr->func != 0 */ | |
| 3583 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3584 UNBIND_TO_GCPRO (speccount, value); | |
| 3585 return value; | |
| 3586 } | |
| 3587 } | |
| 3588 | |
| 428 | 3589 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3590 Evaluate FORM and return its value. | |
| 3591 */ | |
| 3592 (form)) | |
| 3593 { | |
| 3594 /* This function can GC */ | |
| 3595 Lisp_Object fun, val, original_fun, original_args; | |
| 3596 int nargs; | |
| 4162 | 3597 PROFILE_DECLARE(); |
| 428 | 3598 |
| 1318 | 3599 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3600 check_proper_critical_section_lisp_protection (); | |
| 3601 #endif | |
| 3602 | |
| 3989 | 3603 if (!CONSP (form)) |
| 3604 { | |
| 3605 if (SYMBOLP (form)) | |
| 3606 { | |
| 3607 return Fsymbol_value (form); | |
| 3608 } | |
| 3609 | |
| 3610 return form; | |
| 3611 } | |
| 3612 | |
| 428 | 3613 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3614 while (!in_warnings && !NILP (Vpending_warnings) |
| 3615 /* well, perhaps not so safe after all! */ | |
| 3616 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3617 { |
| 3618 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3619 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3620 int speccount = internal_bind_int (&in_warnings, 1); |
| 3621 | |
| 428 | 3622 this_warning_cons = Vpending_warnings; |
| 3623 this_warning = XCAR (this_warning_cons); | |
| 3624 /* in case an error occurs in the warn function, at least | |
| 3625 it won't happen infinitely */ | |
| 3626 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3627 free_cons (this_warning_cons); |
| 1204 | 3628 class_ = XCAR (this_warning); |
| 428 | 3629 level = XCAR (XCDR (this_warning)); |
| 3630 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3631 free_list (this_warning); | |
| 3632 | |
| 3633 if (NILP (Vpending_warnings)) | |
| 3634 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3635 but safer */ | |
| 3636 | |
| 1204 | 3637 GCPRO4 (form, class_, level, messij); |
| 428 | 3638 if (!STRINGP (messij)) |
| 3639 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3640 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3641 UNGCPRO; |
| 771 | 3642 unbind_to (speccount); |
| 428 | 3643 } |
| 3644 | |
| 3645 QUIT; | |
| 814 | 3646 if (need_to_garbage_collect) |
| 428 | 3647 { |
| 3648 struct gcpro gcpro1; | |
| 3649 GCPRO1 (form); | |
| 3092 | 3650 #ifdef NEW_GC |
| 3651 gc_incremental (); | |
| 3652 #else /* not NEW_GC */ | |
| 428 | 3653 garbage_collect_1 (); |
| 3092 | 3654 #endif /* not NEW_GC */ |
| 428 | 3655 UNGCPRO; |
| 3656 } | |
| 3657 | |
| 3658 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3659 { | |
| 3660 if (max_lisp_eval_depth < 100) | |
| 3661 max_lisp_eval_depth = 100; | |
| 3662 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3663 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3664 Qunbound); | |
| 428 | 3665 } |
| 3666 | |
| 3667 /* We guaranteed CONSP (form) above */ | |
| 3668 original_fun = XCAR (form); | |
| 3669 original_args = XCDR (form); | |
| 3670 | |
| 3671 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3672 | |
| 3673 backtrace.pdlcount = specpdl_depth(); | |
| 3674 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3675 backtrace.args = &original_args; | |
| 3676 backtrace.nargs = UNEVALLED; | |
| 3677 backtrace.evalargs = 1; | |
| 3678 backtrace.debug_on_exit = 0; | |
| 1292 | 3679 backtrace.function_being_called = 0; |
| 428 | 3680 PUSH_BACKTRACE (backtrace); |
| 3681 | |
| 3682 if (debug_on_next_call) | |
| 3683 do_debug_on_call (Qt); | |
| 3684 | |
| 3685 /* At this point, only original_fun and original_args | |
| 3686 have values that will be used below. */ | |
| 3687 retry: | |
| 3989 | 3688 /* Optimise for no indirection. */ |
| 3689 fun = original_fun; | |
| 3690 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3691 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3692 { | |
| 3693 fun = indirect_function(original_fun, 1); | |
| 3694 } | |
| 428 | 3695 |
| 3696 if (SUBRP (fun)) | |
| 3697 { | |
| 3698 Lisp_Subr *subr = XSUBR (fun); | |
| 3699 int max_args = subr->max_args; | |
| 3700 | |
| 3701 if (nargs < subr->min_args) | |
| 3702 goto wrong_number_of_arguments; | |
| 3703 | |
| 3704 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3705 { | |
| 3706 backtrace.evalargs = 0; | |
| 1292 | 3707 PROFILE_ENTER_FUNCTION (); |
| 428 | 3708 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3709 (original_args)); | |
| 1292 | 3710 PROFILE_EXIT_FUNCTION (); |
| 428 | 3711 } |
| 3712 else if (nargs <= max_args) | |
| 3713 { | |
| 3714 struct gcpro gcpro1; | |
| 3715 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3716 REGISTER Lisp_Object *p = args; | |
| 3717 | |
| 3718 GCPRO1 (args[0]); | |
| 3719 gcpro1.nvars = 0; | |
| 3720 | |
| 3721 { | |
| 3722 LIST_LOOP_2 (arg, original_args) | |
| 3723 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3724 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3725 gcpro1.nvars++; |
| 3726 } | |
| 3727 } | |
| 3728 | |
| 3729 /* &optional args default to nil. */ | |
| 3730 while (p - args < max_args) | |
| 3731 *p++ = Qnil; | |
| 3732 | |
| 3733 backtrace.args = args; | |
| 3734 backtrace.nargs = nargs; | |
| 3735 | |
| 1292 | 3736 PROFILE_ENTER_FUNCTION (); |
| 428 | 3737 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3738 PROFILE_EXIT_FUNCTION (); |
| 428 | 3739 |
| 3740 UNGCPRO; | |
| 3741 } | |
| 3742 else if (max_args == MANY) | |
| 3743 { | |
| 3744 /* Pass a vector of evaluated arguments */ | |
| 3745 struct gcpro gcpro1; | |
| 3746 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3747 REGISTER Lisp_Object *p = args; | |
| 3748 | |
| 3749 GCPRO1 (args[0]); | |
| 3750 gcpro1.nvars = 0; | |
| 3751 | |
| 3752 { | |
| 3753 LIST_LOOP_2 (arg, original_args) | |
| 3754 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3755 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3756 gcpro1.nvars++; |
| 3757 } | |
| 3758 } | |
| 3759 | |
| 3760 backtrace.args = args; | |
| 3761 backtrace.nargs = nargs; | |
| 3762 | |
| 1292 | 3763 PROFILE_ENTER_FUNCTION (); |
| 428 | 3764 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3765 (nargs, args)); | |
| 1292 | 3766 PROFILE_EXIT_FUNCTION (); |
| 428 | 3767 |
| 3768 UNGCPRO; | |
| 3769 } | |
| 3770 else | |
| 3771 { | |
| 3772 wrong_number_of_arguments: | |
| 440 | 3773 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3774 } |
| 3775 } | |
| 3776 else if (COMPILED_FUNCTIONP (fun)) | |
| 3777 { | |
| 3778 struct gcpro gcpro1; | |
| 3779 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3780 REGISTER Lisp_Object *p = args; | |
| 3781 | |
| 3782 GCPRO1 (args[0]); | |
| 3783 gcpro1.nvars = 0; | |
| 3784 | |
| 3785 { | |
| 3786 LIST_LOOP_2 (arg, original_args) | |
| 3787 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3788 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3789 gcpro1.nvars++; |
| 3790 } | |
| 3791 } | |
| 3792 | |
| 3793 backtrace.args = args; | |
| 3794 backtrace.nargs = nargs; | |
| 3795 backtrace.evalargs = 0; | |
| 3796 | |
| 1292 | 3797 PROFILE_ENTER_FUNCTION (); |
| 428 | 3798 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3799 PROFILE_EXIT_FUNCTION (); |
| 428 | 3800 |
| 3801 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3802 if (backtrace.debug_on_exit) | |
| 3803 val = do_debug_on_exit (val); | |
| 3804 /* Don't do it again when we return to eval. */ | |
| 3805 backtrace.debug_on_exit = 0; | |
| 3806 | |
| 3807 UNGCPRO; | |
| 3808 } | |
| 3809 else if (CONSP (fun)) | |
| 3810 { | |
| 3811 Lisp_Object funcar = XCAR (fun); | |
| 3812 | |
| 3813 if (EQ (funcar, Qautoload)) | |
| 3814 { | |
| 970 | 3815 /* do_autoload GCPROs both arguments */ |
| 428 | 3816 do_autoload (fun, original_fun); |
| 3817 goto retry; | |
| 3818 } | |
| 3819 else if (EQ (funcar, Qmacro)) | |
| 3820 { | |
| 1292 | 3821 PROFILE_ENTER_FUNCTION (); |
| 428 | 3822 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3823 PROFILE_EXIT_FUNCTION (); |
| 428 | 3824 } |
| 3825 else if (EQ (funcar, Qlambda)) | |
| 3826 { | |
| 3827 struct gcpro gcpro1; | |
| 3828 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3829 REGISTER Lisp_Object *p = args; | |
| 3830 | |
| 3831 GCPRO1 (args[0]); | |
| 3832 gcpro1.nvars = 0; | |
| 3833 | |
| 3834 { | |
| 3835 LIST_LOOP_2 (arg, original_args) | |
| 3836 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3837 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3838 gcpro1.nvars++; |
| 3839 } | |
| 3840 } | |
| 3841 | |
| 3842 UNGCPRO; | |
| 3843 | |
| 3844 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3845 backtrace.nargs = nargs; | |
| 3846 backtrace.evalargs = 0; | |
| 3847 | |
| 1292 | 3848 PROFILE_ENTER_FUNCTION (); |
| 428 | 3849 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3850 PROFILE_EXIT_FUNCTION (); |
| 428 | 3851 |
| 3852 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3853 if (backtrace.debug_on_exit) | |
| 3854 val = do_debug_on_exit (val); | |
| 3855 /* Don't do it again when we return to eval. */ | |
| 3856 backtrace.debug_on_exit = 0; | |
| 3857 } | |
| 3858 else | |
| 3859 { | |
| 3860 goto invalid_function; | |
| 3861 } | |
| 3862 } | |
| 4104 | 3863 else if (UNBOUNDP (fun)) |
| 3864 { | |
| 3865 val = signal_void_function_error (original_fun); | |
| 3866 } | |
| 3867 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3868 UNBOUNDP (fun)) */ | |
| 428 | 3869 { |
| 3870 invalid_function: | |
| 436 | 3871 val = signal_invalid_function_error (fun); |
| 428 | 3872 } |
| 3873 | |
| 3874 lisp_eval_depth--; | |
| 3875 if (backtrace.debug_on_exit) | |
| 3876 val = do_debug_on_exit (val); | |
| 3877 POP_BACKTRACE (backtrace); | |
| 3878 return val; | |
| 3879 } | |
| 3880 | |
| 3881 | |
| 1111 | 3882 |
| 3883 static void | |
| 3884 run_post_gc_hook (void) | |
| 3885 { | |
| 3886 Lisp_Object args[2]; | |
| 3887 | |
| 3888 args[0] = Qpost_gc_hook; | |
| 3889 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 3890 | |
| 3891 run_hook_with_args_trapping_problems | |
| 1333 | 3892 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 3893 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 3894 } | |
| 3895 | |
| 428 | 3896 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /* |
| 3897 Call first argument as a function, passing the remaining arguments to it. | |
| 3898 Thus, (funcall 'cons 'x 'y) returns (x . y). | |
| 3899 */ | |
| 3900 (int nargs, Lisp_Object *args)) | |
| 3901 { | |
| 3902 /* This function can GC */ | |
| 3903 Lisp_Object fun; | |
| 3904 Lisp_Object val; | |
| 4162 | 3905 PROFILE_DECLARE(); |
| 428 | 3906 int fun_nargs = nargs - 1; |
| 3907 Lisp_Object *fun_args = args + 1; | |
| 3908 | |
| 1318 | 3909 /* QUIT will check for proper redisplay wrapping */ |
| 3910 | |
| 428 | 3911 QUIT; |
| 851 | 3912 |
| 3913 if (funcall_allocation_flag) | |
| 3914 { | |
| 3915 if (need_to_garbage_collect) | |
| 3916 /* Callers should gcpro lexpr args */ | |
| 3092 | 3917 #ifdef NEW_GC |
| 3918 gc_incremental (); | |
| 3919 #else /* not NEW_GC */ | |
| 851 | 3920 garbage_collect_1 (); |
| 3092 | 3921 #endif /* not NEW_GC */ |
| 851 | 3922 if (need_to_check_c_alloca) |
| 3923 { | |
| 3924 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 3925 { | |
| 3926 xemacs_c_alloca (0); | |
| 3927 funcall_alloca_count = 0; | |
| 3928 } | |
| 3929 } | |
| 887 | 3930 if (need_to_signal_post_gc) |
| 3931 { | |
| 3932 need_to_signal_post_gc = 0; | |
| 1111 | 3933 recompute_funcall_allocation_flag (); |
| 3263 | 3934 #ifdef NEW_GC |
| 3935 run_finalizers (); | |
| 3936 #endif /* NEW_GC */ | |
| 1111 | 3937 run_post_gc_hook (); |
| 887 | 3938 } |
| 851 | 3939 } |
| 428 | 3940 |
| 3941 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3942 { | |
| 3943 if (max_lisp_eval_depth < 100) | |
| 3944 max_lisp_eval_depth = 100; | |
| 3945 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3946 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3947 Qunbound); | |
| 428 | 3948 } |
| 3949 | |
| 1292 | 3950 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3951 backtrace.function = &args[0]; |
| 3952 backtrace.args = fun_args; | |
| 3953 backtrace.nargs = fun_nargs; | |
| 3954 backtrace.evalargs = 0; | |
| 3955 backtrace.debug_on_exit = 0; | |
| 1292 | 3956 backtrace.function_being_called = 0; |
| 428 | 3957 PUSH_BACKTRACE (backtrace); |
| 3958 | |
| 3959 if (debug_on_next_call) | |
| 3960 do_debug_on_call (Qlambda); | |
| 3961 | |
| 3962 retry: | |
| 3963 | |
| 3964 fun = args[0]; | |
| 3965 | |
| 3966 /* We could call indirect_function directly, but profiling shows | |
| 3967 this is worth optimizing by partially unrolling the loop. */ | |
| 3968 if (SYMBOLP (fun)) | |
| 3969 { | |
| 3970 fun = XSYMBOL (fun)->function; | |
| 3971 if (SYMBOLP (fun)) | |
| 3972 { | |
| 3973 fun = XSYMBOL (fun)->function; | |
| 3974 if (SYMBOLP (fun)) | |
| 3975 fun = indirect_function (fun, 1); | |
| 3976 } | |
| 3977 } | |
| 3978 | |
| 3979 if (SUBRP (fun)) | |
| 3980 { | |
| 3981 Lisp_Subr *subr = XSUBR (fun); | |
| 3982 int max_args = subr->max_args; | |
| 3983 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 3984 | |
| 3985 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 3986 { | |
| 3987 funcall_subr: | |
| 1292 | 3988 PROFILE_ENTER_FUNCTION (); |
| 428 | 3989 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 3990 PROFILE_EXIT_FUNCTION (); |
| 428 | 3991 } |
| 436 | 3992 else if (fun_nargs < subr->min_args) |
| 3993 { | |
| 3994 goto wrong_number_of_arguments; | |
| 3995 } | |
| 428 | 3996 else if (fun_nargs < max_args) |
| 3997 { | |
| 3998 Lisp_Object *p = spacious_args; | |
| 3999 | |
| 4000 /* Default optionals to nil */ | |
| 4001 while (fun_nargs--) | |
| 4002 *p++ = *fun_args++; | |
| 4003 while (p - spacious_args < max_args) | |
| 4004 *p++ = Qnil; | |
| 4005 | |
| 4006 fun_args = spacious_args; | |
| 4007 goto funcall_subr; | |
| 4008 } | |
| 4009 else if (max_args == MANY) | |
| 4010 { | |
| 1292 | 4011 PROFILE_ENTER_FUNCTION (); |
| 436 | 4012 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4013 PROFILE_EXIT_FUNCTION (); |
| 428 | 4014 } |
| 4015 else if (max_args == UNEVALLED) /* Can't funcall a special form */ | |
| 4016 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4017 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4018 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4019 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4020 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4021 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4022 } |
| 428 | 4023 goto invalid_function; |
| 4024 } | |
| 4025 else | |
| 4026 { | |
| 4027 wrong_number_of_arguments: | |
| 436 | 4028 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4029 } |
| 4030 } | |
| 4031 else if (COMPILED_FUNCTIONP (fun)) | |
| 4032 { | |
| 1292 | 4033 PROFILE_ENTER_FUNCTION (); |
| 428 | 4034 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4035 PROFILE_EXIT_FUNCTION (); |
| 428 | 4036 } |
| 4037 else if (CONSP (fun)) | |
| 4038 { | |
| 4039 Lisp_Object funcar = XCAR (fun); | |
| 4040 | |
| 4041 if (EQ (funcar, Qlambda)) | |
| 4042 { | |
| 1292 | 4043 PROFILE_ENTER_FUNCTION (); |
| 428 | 4044 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4045 PROFILE_EXIT_FUNCTION (); |
| 428 | 4046 } |
| 4047 else if (EQ (funcar, Qautoload)) | |
| 4048 { | |
| 970 | 4049 /* do_autoload GCPROs both arguments */ |
| 428 | 4050 do_autoload (fun, args[0]); |
| 4051 goto retry; | |
| 4052 } | |
| 4053 else /* Can't funcall a macro */ | |
| 4054 { | |
| 4055 goto invalid_function; | |
| 4056 } | |
| 4057 } | |
| 4058 else if (UNBOUNDP (fun)) | |
| 4059 { | |
| 436 | 4060 val = signal_void_function_error (args[0]); |
| 428 | 4061 } |
| 4062 else | |
| 4063 { | |
| 4064 invalid_function: | |
| 436 | 4065 val = signal_invalid_function_error (fun); |
| 428 | 4066 } |
| 4067 | |
| 4068 lisp_eval_depth--; | |
| 4069 if (backtrace.debug_on_exit) | |
| 4070 val = do_debug_on_exit (val); | |
| 4071 POP_BACKTRACE (backtrace); | |
| 4072 return val; | |
| 4073 } | |
| 4074 | |
| 4075 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4076 Return t if OBJECT can be called as a function, else nil. | |
| 4077 A function is an object that can be applied to arguments, | |
| 4078 using for example `funcall' or `apply'. | |
| 4079 */ | |
| 4080 (object)) | |
| 4081 { | |
| 4082 if (SYMBOLP (object)) | |
| 4083 object = indirect_function (object, 0); | |
| 4084 | |
| 919 | 4085 if (COMPILED_FUNCTIONP (object) || SUBRP (object)) |
| 4086 return Qt; | |
| 4087 if (CONSP (object)) | |
| 4088 { | |
| 4089 Lisp_Object car = XCAR (object); | |
| 4090 if (EQ (car, Qlambda)) | |
| 4091 return Qt; | |
| 4092 if (EQ (car, Qautoload) | |
| 4093 && NILP (Fcar_safe (Fcdr_safe (Fcdr_safe (Fcdr_safe (XCDR (object))))))) | |
| 4094 return Qt; | |
| 4095 } | |
| 4096 return Qnil; | |
| 428 | 4097 } |
| 4098 | |
| 4099 static Lisp_Object | |
| 4100 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4101 { | |
| 4102 Lisp_Object orig_function = function; | |
| 4103 Lisp_Object arglist; | |
| 4104 | |
| 4105 retry: | |
| 4106 | |
| 4107 if (SYMBOLP (function)) | |
| 4108 function = indirect_function (function, 1); | |
| 4109 | |
| 4110 if (SUBRP (function)) | |
| 4111 { | |
| 442 | 4112 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4113 if (function_min_args_p) | |
| 4114 return Fsubr_min_args (function); | |
| 4115 else | |
| 4116 return Fsubr_max_args (function); | |
| 428 | 4117 } |
| 4118 else if (COMPILED_FUNCTIONP (function)) | |
| 4119 { | |
| 814 | 4120 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4121 | |
| 1737 | 4122 if (!OPAQUEP (f->instructions)) |
| 4123 /* Lazily munge the instructions into a more efficient form */ | |
| 4124 /* Needed to set max_args */ | |
| 4125 optimize_compiled_function (function); | |
| 4126 | |
| 814 | 4127 if (function_min_args_p) |
| 4128 return make_int (f->min_args); | |
| 4129 else if (f->max_args == MANY) | |
| 4130 return Qnil; | |
| 4131 else | |
| 4132 return make_int (f->max_args); | |
| 428 | 4133 } |
| 4134 else if (CONSP (function)) | |
| 4135 { | |
| 4136 Lisp_Object funcar = XCAR (function); | |
| 4137 | |
| 4138 if (EQ (funcar, Qmacro)) | |
| 4139 { | |
| 4140 function = XCDR (function); | |
| 4141 goto retry; | |
| 4142 } | |
| 4143 else if (EQ (funcar, Qautoload)) | |
| 4144 { | |
| 970 | 4145 /* do_autoload GCPROs both arguments */ |
| 428 | 4146 do_autoload (function, orig_function); |
| 442 | 4147 function = orig_function; |
| 428 | 4148 goto retry; |
| 4149 } | |
| 4150 else if (EQ (funcar, Qlambda)) | |
| 4151 { | |
| 4152 arglist = Fcar (XCDR (function)); | |
| 4153 } | |
| 4154 else | |
| 4155 { | |
| 4156 goto invalid_function; | |
| 4157 } | |
| 4158 } | |
| 4159 else | |
| 4160 { | |
| 4161 invalid_function: | |
| 442 | 4162 return signal_invalid_function_error (orig_function); |
| 428 | 4163 } |
| 4164 | |
| 4165 { | |
| 4166 int argcount = 0; | |
| 4167 | |
| 4168 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4169 { | |
| 4170 if (EQ (arg, Qand_optional)) | |
| 4171 { | |
| 4172 if (function_min_args_p) | |
| 4173 break; | |
| 4174 } | |
| 4175 else if (EQ (arg, Qand_rest)) | |
| 4176 { | |
| 4177 if (function_min_args_p) | |
| 4178 break; | |
| 4179 else | |
| 4180 return Qnil; | |
| 4181 } | |
| 4182 else | |
| 4183 { | |
| 4184 argcount++; | |
| 4185 } | |
| 4186 } | |
| 4187 | |
| 4188 return make_int (argcount); | |
| 4189 } | |
| 4190 } | |
| 4191 | |
| 4192 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4193 Return the minimum number of arguments a function may be called with. |
| 428 | 4194 The function may be any form that can be passed to `funcall', |
| 4195 any special form, or any macro. | |
| 853 | 4196 |
| 4197 To check if a function can be called with a specified number of | |
| 4198 arguments, use `function-allows-args'. | |
| 428 | 4199 */ |
| 4200 (function)) | |
| 4201 { | |
| 4202 return function_argcount (function, 1); | |
| 4203 } | |
| 4204 | |
| 4205 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4206 Return the maximum number of arguments a function may be called with. |
| 428 | 4207 The function may be any form that can be passed to `funcall', |
| 4208 any special form, or any macro. | |
| 4209 If the function takes an arbitrary number of arguments or is | |
| 4210 a built-in special form, nil is returned. | |
| 853 | 4211 |
| 4212 To check if a function can be called with a specified number of | |
| 4213 arguments, use `function-allows-args'. | |
| 428 | 4214 */ |
| 4215 (function)) | |
| 4216 { | |
| 4217 return function_argcount (function, 0); | |
| 4218 } | |
| 4219 | |
| 4220 | |
| 4221 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4222 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4223 Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
| 4224 */ | |
| 4225 (int nargs, Lisp_Object *args)) | |
| 4226 { | |
| 4227 /* This function can GC */ | |
| 4228 Lisp_Object fun = args[0]; | |
| 4229 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4230 int numargs; | |
| 4231 int funcall_nargs; | |
| 4232 | |
| 4233 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4234 | |
| 4235 if (numargs == 0) | |
| 4236 /* (apply foo 0 1 '()) */ | |
| 4237 return Ffuncall (nargs - 1, args); | |
| 4238 else if (numargs == 1) | |
| 4239 { | |
| 4240 /* (apply foo 0 1 '(2)) */ | |
| 4241 args [nargs - 1] = XCAR (spread_arg); | |
| 4242 return Ffuncall (nargs, args); | |
| 4243 } | |
| 4244 | |
| 4245 /* -1 for function, -1 for spread arg */ | |
| 4246 numargs = nargs - 2 + numargs; | |
| 4247 /* +1 for function */ | |
| 4248 funcall_nargs = 1 + numargs; | |
| 4249 | |
| 4250 if (SYMBOLP (fun)) | |
| 4251 fun = indirect_function (fun, 0); | |
| 4252 | |
| 4253 if (SUBRP (fun)) | |
| 4254 { | |
| 4255 Lisp_Subr *subr = XSUBR (fun); | |
| 4256 int max_args = subr->max_args; | |
| 4257 | |
| 4258 if (numargs < subr->min_args | |
| 4259 || (max_args >= 0 && max_args < numargs)) | |
| 4260 { | |
| 4261 /* Let funcall get the error */ | |
| 4262 } | |
| 4263 else if (max_args > numargs) | |
| 4264 { | |
| 4265 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4266 by explicitly supplying nil's for optional values */ | |
| 4267 funcall_nargs += (max_args - numargs); | |
| 4268 } | |
| 4269 } | |
| 4270 else if (UNBOUNDP (fun)) | |
| 4271 { | |
| 4272 /* Let funcall get the error */ | |
| 4273 fun = args[0]; | |
| 4274 } | |
| 4275 | |
| 4276 { | |
| 4277 REGISTER int i; | |
| 4278 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4279 struct gcpro gcpro1; | |
| 4280 | |
| 4281 GCPRO1 (*funcall_args); | |
| 4282 gcpro1.nvars = funcall_nargs; | |
| 4283 | |
| 4284 /* Copy in the unspread args */ | |
| 4285 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4286 /* Spread the last arg we got. Its first element goes in | |
| 4287 the slot that it used to occupy, hence this value of I. */ | |
| 4288 for (i = nargs - 1; | |
| 4289 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4290 i++, spread_arg = XCDR (spread_arg)) | |
| 4291 { | |
| 4292 funcall_args [i] = XCAR (spread_arg); | |
| 4293 } | |
| 4294 /* Supply nil for optional args (to subrs) */ | |
| 4295 for (; i < funcall_nargs; i++) | |
| 4296 funcall_args[i] = Qnil; | |
| 4297 | |
| 4298 | |
| 4299 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4300 } | |
| 4301 } | |
| 4302 | |
| 4303 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4304 return the result of evaluation. */ | |
| 4305 | |
| 4306 static Lisp_Object | |
| 4307 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4308 { | |
| 4309 /* This function can GC */ | |
| 442 | 4310 Lisp_Object arglist, body, tail; |
| 428 | 4311 int speccount = specpdl_depth(); |
| 4312 REGISTER int i = 0; | |
| 4313 | |
| 4314 tail = XCDR (fun); | |
| 4315 | |
| 4316 if (!CONSP (tail)) | |
| 4317 goto invalid_function; | |
| 4318 | |
| 4319 arglist = XCAR (tail); | |
| 4320 body = XCDR (tail); | |
| 4321 | |
| 4322 { | |
| 4323 int optional = 0, rest = 0; | |
| 4324 | |
| 442 | 4325 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4326 { |
| 4327 if (!SYMBOLP (symbol)) | |
| 4328 goto invalid_function; | |
| 4329 if (EQ (symbol, Qand_rest)) | |
| 4330 rest = 1; | |
| 4331 else if (EQ (symbol, Qand_optional)) | |
| 4332 optional = 1; | |
| 4333 else if (rest) | |
| 4334 { | |
| 4335 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4336 i = nargs; | |
| 4337 } | |
| 4338 else if (i < nargs) | |
| 4339 specbind (symbol, args[i++]); | |
| 4340 else if (!optional) | |
| 4341 goto wrong_number_of_arguments; | |
| 4342 else | |
| 4343 specbind (symbol, Qnil); | |
| 4344 } | |
| 4345 } | |
| 4346 | |
| 4347 if (i < nargs) | |
| 4348 goto wrong_number_of_arguments; | |
| 4349 | |
| 771 | 4350 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4351 |
| 4352 wrong_number_of_arguments: | |
| 436 | 4353 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4354 |
| 4355 invalid_function: | |
| 436 | 4356 return signal_invalid_function_error (fun); |
| 428 | 4357 } |
| 4358 | |
| 4359 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4360 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4361 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4362 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
|
4363 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4364 -- 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
|
4365 -- 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
|
4366 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4367 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4368 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
|
4369 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4370 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
|
4371 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
|
4372 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
|
4373 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
|
4374 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
|
4375 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
|
4376 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
|
4377 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
|
4378 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4379 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
|
4380 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
|
4381 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
|
4382 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
|
4383 #'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
|
4384 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
|
4385 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4386 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4387 (#'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
|
4388 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
|
4389 #'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
|
4390 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
|
4391 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
|
4392 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4393 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
|
4394 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
|
4395 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
|
4396 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
|
4397 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4398 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
|
4399 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
|
4400 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
|
4401 on being printed from within GDB. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4402 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4403 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
|
4404 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
|
4405 #'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
|
4406 #'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
|
4407 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
|
4408 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
|
4409 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
|
4410 *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
|
4411 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4412 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4413 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
|
4414 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4415 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4416 "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
|
4417 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
|
4418 used." |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4419 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4420 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
|
4421 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
|
4422 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
|
4423 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
|
4424 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4425 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4426 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
|
4427 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4428 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4429 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4430 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4431 Elemcount i, allocated_count; |
|
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 assert (count != 1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4434 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4435 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
|
4436 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4437 /* 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
|
4438 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4439 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4440 } |
|
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 if (first_desired >= count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4443 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4444 /* 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
|
4445 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4446 allocated_count = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4447 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4448 else |
|
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 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
|
4451 - first_desired); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4452 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4453 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4454 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
|
4455 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4456 contents, allocated_count); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4457 mv = (multiple_value *) BASIC_ALLOC_LCRECORD (sizem, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4458 &lrecord_multiple_value); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4459 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4460 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4461 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4462 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4463 mv->contents[0] = first_value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4464 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4465 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
|
4466 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4467 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
|
4468 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4469 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4470 return wrap_multiple_value (mv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4471 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4472 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4473 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4474 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
|
4475 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4476 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
|
4477 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4478 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4479 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4480 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4481 (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
|
4482 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4483 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
|
4484 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4485 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4486 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4487 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
|
4488 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4489 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4490 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4491 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
|
4492 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4493 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
|
4494 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4495 Elemcount allocated_count = mv->allocated_count; |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4498 (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
|
4499 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4500 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
|
4501 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4502 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4503 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4504 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
|
4505 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4506 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4507 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4508 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
|
4509 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4510 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
|
4511 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4512 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4513 Elemcount count = mv->count, index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4514 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4515 if (print_readably) |
|
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 printing_unreadable_object ("multiple values"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4518 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4519 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4520 if (0 == count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4521 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4522 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
|
4523 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4524 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4525 for (index = 0; index < count;) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4526 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4527 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4528 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4529 index >= (first_desired + (allocated_count - 1)))) |
|
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 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
|
4532 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4533 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4534 else |
|
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 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
|
4537 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4538 } |
|
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 ++index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4541 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4542 if (count > 1 && index < 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 write_c_string (printcharfun, " ;\n"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 } |
|
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 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4548 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4549 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4550 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4551 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4552 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
|
4553 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
|
4554 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4555 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
|
4556 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4557 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4558 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4559 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4560 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4561 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4562 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4563 static Bytecount |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4564 size_multiple_value (const void *lheader) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4565 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4566 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
|
4567 Lisp_Object, contents, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4568 ((struct multiple_value *) lheader)-> |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4569 allocated_count); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 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
|
4573 { 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
|
4574 { 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
|
4575 { 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
|
4576 { 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
|
4577 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4578 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4579 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4581 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("multiple-value", multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 1, /*dumpable-flag*/ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4583 mark_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4584 print_multiple_value, 0, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4585 0, /* No equal method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4586 0, /* No hash method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 multiple_value_description, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 size_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 struct multiple_value); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4590 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4591 /* 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
|
4592 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
|
4593 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
|
4594 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
|
4595 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4596 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
|
4597 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4598 int result = specpdl_depth(); |
|
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 if (!(upper > first)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4601 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4602 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
|
4603 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4604 } |
|
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 (upper > Vmultiple_values_limit) |
|
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 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
|
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 /* 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
|
4612 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
|
4613 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
|
4614 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
|
4615 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4616 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
|
4617 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
|
4618 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4619 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
|
4620 if (0 == first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4621 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4622 first = 1; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4625 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4626 || first < first_desired_multiple_value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4628 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
|
4629 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4630 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4631 if (upper > multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4632 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4633 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
|
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 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4637 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4638 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 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
|
4641 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4642 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4643 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4644 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
|
4645 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 Lisp_Object apply_args[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4647 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4648 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4649 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4650 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4651 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4652 CHECK_FUNCTION (args[0]); |
|
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 /* 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
|
4655 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
|
4656 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4657 for (i = 4; i < nargs; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4658 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4660 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4661 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4662 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4663 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
|
4664 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4665 for (i = 0; i < count; i++) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4666 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 val = multiple_value_aref (result, i); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4668 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4670 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4671 list_offset = XCDR (list_offset); |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4675 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4676 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4677 list_offset = XCDR (list_offset); |
|
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 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4680 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4681 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4682 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4683 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4684 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4685 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4686 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
|
4687 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4688 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4689 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
|
4690 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
|
4691 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4692 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
|
4693 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
|
4694 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
|
4695 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
|
4696 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4697 arguments: (FUNCTION &rest FORMS) |
|
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 (args)) |
|
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 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4702 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4703 struct gcpro gcpro1; |
|
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 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4706 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4707 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
|
4708 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4709 /* 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
|
4710 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
|
4711 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4712 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4713 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4714 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4715 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4716 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4717 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4718 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
|
4719 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4720 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4721 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
|
4722 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4723 gcpro1.nvars = ++i; |
|
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 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4726 LIST_LOOP_2 (elt, XCDR (args)) |
|
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 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4729 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4730 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4731 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4733 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
|
4734 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4737 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
|
4738 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4739 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
|
4740 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4741 Lisp_Object result = Qnil; |
|
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 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4744 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4745 result = args[3]; |
|
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 if (MULTIPLE_VALUEP (result)) |
|
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 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4753 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
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 for (; first < upper && first < count; ++first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4756 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4757 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4758 assert (!UNBOUNDP (val)); |
|
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 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4761 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4762 } |
|
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 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4765 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4766 else |
|
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 if (first == 0) |
|
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 return Fcons (result, Qnil); |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4773 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4774 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4775 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4776 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4777 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4778 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4779 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
|
4780 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 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
|
4782 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 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
|
4784 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4785 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4786 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
|
4787 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
|
4788 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
|
4789 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
|
4790 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
|
4791 `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
|
4792 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4793 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
|
4794 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4796 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4797 Lisp_Object argv[4]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4798 int first, upper; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4800 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4801 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
|
4802 CHECK_NATNUM (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4803 first = XINT (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4804 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4805 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4806 gcpro1.nvars = 1; |
|
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 args = XCDR (args); |
|
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 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
|
4811 CHECK_NATNUM (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4812 upper = XINT (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4814 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 /* 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
|
4816 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
|
4817 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
|
4818 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4819 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
|
4820 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4821 args = XCDR (args); |
|
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 /* 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
|
4824 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
|
4825 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
|
4826 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
|
4827 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
|
4828 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 gcpro1.nvars = 4; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4832 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
|
4833 } |
|
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 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
|
4836 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
|
4837 `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
|
4838 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 arguments: (FIRST &rest BODY) |
|
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 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4843 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4844 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4845 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4846 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4847 val = Feval (XCAR (args)); |
|
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 GCPRO1 (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4850 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4851 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4852 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4853 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 } |
|
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 RETURN_UNGCPRO (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4857 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4858 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4859 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4860 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4861 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4862 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4863 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4864 (int nargs, Lisp_Object *args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4865 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4866 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4867 int counting = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4868 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4869 /* 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
|
4870 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
|
4871 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4872 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4874 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4875 /* If 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
|
4876 #'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
|
4877 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
|
4878 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4879 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
|
4880 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4881 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 for (; counting < nargs; ++counting) |
|
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 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4886 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4887 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4888 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
|
4889 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4890 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4891 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4892 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4893 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4894 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4895 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
|
4896 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
|
4897 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4898 (list)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4901 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4902 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4903 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
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 /* 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
|
4906 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
|
4907 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4908 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4909 } |
|
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 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
|
4912 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4913 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4914 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4915 list = Fcdr_safe (list); |
|
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 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4918 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4919 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4920 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4921 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4922 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 multiple_value_aset (result, counting, elt); |
|
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 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4926 } |
|
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 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4930 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4933 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
|
4934 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4935 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4936 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4937 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4938 argv[1] = second; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4939 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4940 return Fvalues (countof (argv), argv); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4943 |
| 428 | 4944 /************************************************************************/ |
| 4945 /* Run hook variables in various ways. */ | |
| 4946 /************************************************************************/ | |
| 4947 | |
| 4948 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 4949 Run each hook in HOOKS. Major mode functions use this. | |
| 4950 Each argument should be a symbol, a hook variable. | |
| 4951 These symbols are processed in the order specified. | |
| 4952 If a hook symbol has a non-nil value, that value may be a function | |
| 4953 or a list of functions to be called to run the hook. | |
| 4954 If the value is a function, it is called with no arguments. | |
| 4955 If it is a list, the elements are called, in order, with no arguments. | |
| 4956 | |
| 4957 To make a hook variable buffer-local, use `make-local-hook', | |
| 4958 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
4959 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
4960 arguments: (&rest HOOKS) |
| 428 | 4961 */ |
| 4962 (int nargs, Lisp_Object *args)) | |
| 4963 { | |
| 4964 REGISTER int i; | |
| 4965 | |
| 4966 for (i = 0; i < nargs; i++) | |
| 4967 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 4968 | |
| 4969 return Qnil; | |
| 4970 } | |
| 4971 | |
| 4972 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 4973 Run HOOK with the specified arguments ARGS. | |
| 4974 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 4975 value, that value may be a function or a list of functions to be | |
| 4976 called to run the hook. If the value is a function, it is called with | |
| 4977 the given arguments and its return value is returned. If it is a list | |
| 4978 of functions, those functions are called, in order, | |
| 4979 with the given arguments ARGS. | |
| 444 | 4980 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 4981 as that may change. |
| 4982 | |
| 4983 To make a hook variable buffer-local, use `make-local-hook', | |
| 4984 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
4985 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
4986 arguments: (HOOK &rest ARGS) |
| 428 | 4987 */ |
| 4988 (int nargs, Lisp_Object *args)) | |
| 4989 { | |
| 4990 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 4991 } | |
| 4992 | |
| 4993 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 4994 Run HOOK with the specified arguments ARGS. | |
| 4995 HOOK should be a symbol, a hook variable. Its value should | |
| 4996 be a list of functions. We call those functions, one by one, | |
| 4997 passing arguments ARGS to each of them, until one of them | |
| 4998 returns a non-nil value. Then we return that value. | |
| 4999 If all the functions return nil, we return nil. | |
| 5000 | |
| 5001 To make a hook variable buffer-local, use `make-local-hook', | |
| 5002 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5003 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5004 arguments: (HOOK &rest ARGS) |
| 428 | 5005 */ |
| 5006 (int nargs, Lisp_Object *args)) | |
| 5007 { | |
| 5008 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5009 } | |
| 5010 | |
| 5011 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5012 Run HOOK with the specified arguments ARGS. | |
| 5013 HOOK should be a symbol, a hook variable. Its value should | |
| 5014 be a list of functions. We call those functions, one by one, | |
| 5015 passing arguments ARGS to each of them, until one of them | |
| 5016 returns nil. Then we return nil. | |
| 5017 If all the functions return non-nil, we return non-nil. | |
| 5018 | |
| 5019 To make a hook variable buffer-local, use `make-local-hook', | |
| 5020 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5021 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5022 arguments: (HOOK &rest ARGS) |
| 428 | 5023 */ |
| 5024 (int nargs, Lisp_Object *args)) | |
| 5025 { | |
| 5026 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5027 } | |
| 5028 | |
| 5029 /* ARGS[0] should be a hook symbol. | |
| 5030 Call each of the functions in the hook value, passing each of them | |
| 5031 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5032 COND specifies a condition to test after each call | |
| 5033 to decide whether to stop. | |
| 5034 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5035 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5036 | |
| 5037 Lisp_Object | |
| 5038 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5039 enum run_hooks_condition cond) | |
| 5040 { | |
| 5041 Lisp_Object sym, val, ret; | |
| 5042 | |
| 5043 if (!initialized || preparing_for_armageddon) | |
| 5044 /* We need to bail out of here pronto. */ | |
| 5045 return Qnil; | |
| 5046 | |
| 3092 | 5047 #ifndef NEW_GC |
| 428 | 5048 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5049 will also be true unless something is really hosed. */ | |
| 5050 assert (!gc_in_progress); | |
| 3092 | 5051 #endif /* not NEW_GC */ |
| 428 | 5052 |
| 5053 sym = args[0]; | |
| 771 | 5054 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5055 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5056 | |
| 5057 if (UNBOUNDP (val) || NILP (val)) | |
| 5058 return ret; | |
| 5059 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5060 { | |
| 5061 args[0] = val; | |
| 5062 return Ffuncall (nargs, args); | |
| 5063 } | |
| 5064 else | |
| 5065 { | |
| 5066 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5067 Lisp_Object globals = Qnil; | |
| 5068 GCPRO3 (sym, val, globals); | |
| 5069 | |
| 5070 for (; | |
| 5071 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5072 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5073 : !NILP (ret))); | |
| 5074 val = XCDR (val)) | |
| 5075 { | |
| 5076 if (EQ (XCAR (val), Qt)) | |
| 5077 { | |
| 5078 /* t indicates this hook has a local binding; | |
| 5079 it means to run the global binding too. */ | |
| 5080 globals = Fdefault_value (sym); | |
| 5081 | |
| 5082 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5083 ! NILP (globals)) | |
| 5084 { | |
| 5085 args[0] = globals; | |
| 5086 ret = Ffuncall (nargs, args); | |
| 5087 } | |
| 5088 else | |
| 5089 { | |
| 5090 for (; | |
| 5091 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5092 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5093 ? NILP (ret) | |
| 5094 : !NILP (ret))); | |
| 5095 globals = XCDR (globals)) | |
| 5096 { | |
| 5097 args[0] = XCAR (globals); | |
| 5098 /* In a global value, t should not occur. If it does, we | |
| 5099 must ignore it to avoid an endless loop. */ | |
| 5100 if (!EQ (args[0], Qt)) | |
| 5101 ret = Ffuncall (nargs, args); | |
| 5102 } | |
| 5103 } | |
| 5104 } | |
| 5105 else | |
| 5106 { | |
| 5107 args[0] = XCAR (val); | |
| 5108 ret = Ffuncall (nargs, args); | |
| 5109 } | |
| 5110 } | |
| 5111 | |
| 5112 UNGCPRO; | |
| 5113 return ret; | |
| 5114 } | |
| 5115 } | |
| 5116 | |
| 5117 Lisp_Object | |
| 5118 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5119 enum run_hooks_condition cond) | |
| 5120 { | |
| 5121 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5122 } | |
| 5123 | |
| 5124 #if 0 | |
| 5125 | |
| 853 | 5126 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5127 |
| 5128 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5129 present value of that symbol. | |
| 5130 Call each element of FUNLIST, | |
| 5131 passing each of them the rest of ARGS. | |
| 5132 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5133 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5134 | |
| 5135 Lisp_Object | |
| 5136 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5137 { | |
| 853 | 5138 omitted; |
| 428 | 5139 } |
| 5140 | |
| 5141 #endif /* 0 */ | |
| 5142 | |
| 5143 void | |
| 5144 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5145 { | |
| 5146 /* This function can GC */ | |
| 5147 struct gcpro gcpro1; | |
| 5148 int i; | |
| 5149 va_list vargs; | |
| 5150 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5151 | |
| 5152 va_start (vargs, nargs); | |
| 5153 funcall_args[0] = hook_var; | |
| 5154 for (i = 0; i < nargs; i++) | |
| 5155 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5156 va_end (vargs); | |
| 5157 | |
| 5158 GCPRO1 (*funcall_args); | |
| 5159 gcpro1.nvars = nargs + 1; | |
| 5160 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5161 UNGCPRO; | |
| 5162 } | |
| 5163 | |
| 5164 void | |
| 5165 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5166 int nargs, ...) | |
| 5167 { | |
| 5168 /* This function can GC */ | |
| 5169 struct gcpro gcpro1; | |
| 5170 int i; | |
| 5171 va_list vargs; | |
| 5172 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5173 | |
| 5174 va_start (vargs, nargs); | |
| 5175 funcall_args[0] = hook_var; | |
| 5176 for (i = 0; i < nargs; i++) | |
| 5177 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5178 va_end (vargs); | |
| 5179 | |
| 5180 GCPRO1 (*funcall_args); | |
| 5181 gcpro1.nvars = nargs + 1; | |
| 5182 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5183 RUN_HOOKS_TO_COMPLETION); | |
| 5184 UNGCPRO; | |
| 5185 } | |
| 5186 | |
| 5187 Lisp_Object | |
| 5188 run_hook (Lisp_Object hook) | |
| 5189 { | |
| 853 | 5190 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5191 } |
| 5192 | |
| 5193 | |
| 5194 /************************************************************************/ | |
| 5195 /* Front-ends to eval, funcall, apply */ | |
| 5196 /************************************************************************/ | |
| 5197 | |
| 5198 /* Apply fn to arg */ | |
| 5199 Lisp_Object | |
| 5200 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5201 { | |
| 5202 /* This function can GC */ | |
| 5203 struct gcpro gcpro1; | |
| 5204 Lisp_Object args[2]; | |
| 5205 | |
| 5206 if (NILP (arg)) | |
| 5207 return Ffuncall (1, &fn); | |
| 5208 GCPRO1 (args[0]); | |
| 5209 gcpro1.nvars = 2; | |
| 5210 args[0] = fn; | |
| 5211 args[1] = arg; | |
| 5212 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5213 } | |
| 5214 | |
| 5215 /* Call function fn on no arguments */ | |
| 5216 Lisp_Object | |
| 5217 call0 (Lisp_Object fn) | |
| 5218 { | |
| 5219 /* This function can GC */ | |
| 5220 struct gcpro gcpro1; | |
| 5221 | |
| 5222 GCPRO1 (fn); | |
| 5223 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5224 } | |
| 5225 | |
| 5226 /* Call function fn with argument arg0 */ | |
| 5227 Lisp_Object | |
| 5228 call1 (Lisp_Object fn, | |
| 5229 Lisp_Object arg0) | |
| 5230 { | |
| 5231 /* This function can GC */ | |
| 5232 struct gcpro gcpro1; | |
| 5233 Lisp_Object args[2]; | |
| 5234 args[0] = fn; | |
| 5235 args[1] = arg0; | |
| 5236 GCPRO1 (args[0]); | |
| 5237 gcpro1.nvars = 2; | |
| 5238 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5239 } | |
| 5240 | |
| 5241 /* Call function fn with arguments arg0, arg1 */ | |
| 5242 Lisp_Object | |
| 5243 call2 (Lisp_Object fn, | |
| 5244 Lisp_Object arg0, Lisp_Object arg1) | |
| 5245 { | |
| 5246 /* This function can GC */ | |
| 5247 struct gcpro gcpro1; | |
| 5248 Lisp_Object args[3]; | |
| 5249 args[0] = fn; | |
| 5250 args[1] = arg0; | |
| 5251 args[2] = arg1; | |
| 5252 GCPRO1 (args[0]); | |
| 5253 gcpro1.nvars = 3; | |
| 5254 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5255 } | |
| 5256 | |
| 5257 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5258 Lisp_Object | |
| 5259 call3 (Lisp_Object fn, | |
| 5260 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5261 { | |
| 5262 /* This function can GC */ | |
| 5263 struct gcpro gcpro1; | |
| 5264 Lisp_Object args[4]; | |
| 5265 args[0] = fn; | |
| 5266 args[1] = arg0; | |
| 5267 args[2] = arg1; | |
| 5268 args[3] = arg2; | |
| 5269 GCPRO1 (args[0]); | |
| 5270 gcpro1.nvars = 4; | |
| 5271 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5272 } | |
| 5273 | |
| 5274 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5275 Lisp_Object | |
| 5276 call4 (Lisp_Object fn, | |
| 5277 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5278 Lisp_Object arg3) | |
| 5279 { | |
| 5280 /* This function can GC */ | |
| 5281 struct gcpro gcpro1; | |
| 5282 Lisp_Object args[5]; | |
| 5283 args[0] = fn; | |
| 5284 args[1] = arg0; | |
| 5285 args[2] = arg1; | |
| 5286 args[3] = arg2; | |
| 5287 args[4] = arg3; | |
| 5288 GCPRO1 (args[0]); | |
| 5289 gcpro1.nvars = 5; | |
| 5290 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5291 } | |
| 5292 | |
| 5293 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5294 Lisp_Object | |
| 5295 call5 (Lisp_Object fn, | |
| 5296 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5297 Lisp_Object arg3, Lisp_Object arg4) | |
| 5298 { | |
| 5299 /* This function can GC */ | |
| 5300 struct gcpro gcpro1; | |
| 5301 Lisp_Object args[6]; | |
| 5302 args[0] = fn; | |
| 5303 args[1] = arg0; | |
| 5304 args[2] = arg1; | |
| 5305 args[3] = arg2; | |
| 5306 args[4] = arg3; | |
| 5307 args[5] = arg4; | |
| 5308 GCPRO1 (args[0]); | |
| 5309 gcpro1.nvars = 6; | |
| 5310 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5311 } | |
| 5312 | |
| 5313 Lisp_Object | |
| 5314 call6 (Lisp_Object fn, | |
| 5315 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5316 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5317 { | |
| 5318 /* This function can GC */ | |
| 5319 struct gcpro gcpro1; | |
| 5320 Lisp_Object args[7]; | |
| 5321 args[0] = fn; | |
| 5322 args[1] = arg0; | |
| 5323 args[2] = arg1; | |
| 5324 args[3] = arg2; | |
| 5325 args[4] = arg3; | |
| 5326 args[5] = arg4; | |
| 5327 args[6] = arg5; | |
| 5328 GCPRO1 (args[0]); | |
| 5329 gcpro1.nvars = 7; | |
| 5330 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5331 } | |
| 5332 | |
| 5333 Lisp_Object | |
| 5334 call7 (Lisp_Object fn, | |
| 5335 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5336 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5337 Lisp_Object arg6) | |
| 5338 { | |
| 5339 /* This function can GC */ | |
| 5340 struct gcpro gcpro1; | |
| 5341 Lisp_Object args[8]; | |
| 5342 args[0] = fn; | |
| 5343 args[1] = arg0; | |
| 5344 args[2] = arg1; | |
| 5345 args[3] = arg2; | |
| 5346 args[4] = arg3; | |
| 5347 args[5] = arg4; | |
| 5348 args[6] = arg5; | |
| 5349 args[7] = arg6; | |
| 5350 GCPRO1 (args[0]); | |
| 5351 gcpro1.nvars = 8; | |
| 5352 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5353 } | |
| 5354 | |
| 5355 Lisp_Object | |
| 5356 call8 (Lisp_Object fn, | |
| 5357 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5358 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5359 Lisp_Object arg6, Lisp_Object arg7) | |
| 5360 { | |
| 5361 /* This function can GC */ | |
| 5362 struct gcpro gcpro1; | |
| 5363 Lisp_Object args[9]; | |
| 5364 args[0] = fn; | |
| 5365 args[1] = arg0; | |
| 5366 args[2] = arg1; | |
| 5367 args[3] = arg2; | |
| 5368 args[4] = arg3; | |
| 5369 args[5] = arg4; | |
| 5370 args[6] = arg5; | |
| 5371 args[7] = arg6; | |
| 5372 args[8] = arg7; | |
| 5373 GCPRO1 (args[0]); | |
| 5374 gcpro1.nvars = 9; | |
| 5375 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5376 } | |
| 5377 | |
| 5378 Lisp_Object | |
| 5379 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5380 { | |
| 5381 if (current_buffer == buf) | |
| 5382 return call0 (fn); | |
| 5383 else | |
| 5384 { | |
| 5385 Lisp_Object val; | |
| 5386 int speccount = specpdl_depth(); | |
| 5387 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5388 set_buffer_internal (buf); | |
| 5389 val = call0 (fn); | |
| 771 | 5390 unbind_to (speccount); |
| 428 | 5391 return val; |
| 5392 } | |
| 5393 } | |
| 5394 | |
| 5395 Lisp_Object | |
| 5396 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5397 Lisp_Object arg0) | |
| 5398 { | |
| 5399 if (current_buffer == buf) | |
| 5400 return call1 (fn, arg0); | |
| 5401 else | |
| 5402 { | |
| 5403 Lisp_Object val; | |
| 5404 int speccount = specpdl_depth(); | |
| 5405 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5406 set_buffer_internal (buf); | |
| 5407 val = call1 (fn, arg0); | |
| 771 | 5408 unbind_to (speccount); |
| 428 | 5409 return val; |
| 5410 } | |
| 5411 } | |
| 5412 | |
| 5413 Lisp_Object | |
| 5414 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5415 Lisp_Object arg0, Lisp_Object arg1) | |
| 5416 { | |
| 5417 if (current_buffer == buf) | |
| 5418 return call2 (fn, arg0, arg1); | |
| 5419 else | |
| 5420 { | |
| 5421 Lisp_Object val; | |
| 5422 int speccount = specpdl_depth(); | |
| 5423 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5424 set_buffer_internal (buf); | |
| 5425 val = call2 (fn, arg0, arg1); | |
| 771 | 5426 unbind_to (speccount); |
| 428 | 5427 return val; |
| 5428 } | |
| 5429 } | |
| 5430 | |
| 5431 Lisp_Object | |
| 5432 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5433 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5434 { | |
| 5435 if (current_buffer == buf) | |
| 5436 return call3 (fn, arg0, arg1, arg2); | |
| 5437 else | |
| 5438 { | |
| 5439 Lisp_Object val; | |
| 5440 int speccount = specpdl_depth(); | |
| 5441 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5442 set_buffer_internal (buf); | |
| 5443 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5444 unbind_to (speccount); |
| 428 | 5445 return val; |
| 5446 } | |
| 5447 } | |
| 5448 | |
| 5449 Lisp_Object | |
| 5450 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5451 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5452 Lisp_Object arg3) | |
| 5453 { | |
| 5454 if (current_buffer == buf) | |
| 5455 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5456 else | |
| 5457 { | |
| 5458 Lisp_Object val; | |
| 5459 int speccount = specpdl_depth(); | |
| 5460 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5461 set_buffer_internal (buf); | |
| 5462 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5463 unbind_to (speccount); |
| 428 | 5464 return val; |
| 5465 } | |
| 5466 } | |
| 5467 | |
| 5468 Lisp_Object | |
| 5469 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5470 { | |
| 5471 if (current_buffer == buf) | |
| 5472 return Feval (form); | |
| 5473 else | |
| 5474 { | |
| 5475 Lisp_Object val; | |
| 5476 int speccount = specpdl_depth(); | |
| 5477 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5478 set_buffer_internal (buf); | |
| 5479 val = Feval (form); | |
| 771 | 5480 unbind_to (speccount); |
| 428 | 5481 return val; |
| 5482 } | |
| 5483 } | |
| 5484 | |
| 5485 | |
| 5486 /************************************************************************/ | |
| 5487 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5488 /************************************************************************/ | |
| 5489 | |
| 853 | 5490 int |
| 5491 get_inhibit_flags (void) | |
| 5492 { | |
| 5493 return inhibit_flags; | |
| 5494 } | |
| 5495 | |
| 5496 void | |
| 2286 | 5497 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5498 { |
| 5499 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5500 { | |
| 5501 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5502 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5503 invalid_change | |
| 5504 ("Modification of this buffer not currently permitted", obj); | |
| 5505 } | |
| 5506 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5507 { | |
| 5508 if (what == OPERATION_DELETE_OBJECT | |
| 5509 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5510 || CONSOLEP (obj)) | |
| 5511 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5512 invalid_change | |
| 5513 ("Deletion of this object not currently permitted", obj); | |
| 5514 } | |
| 5515 } | |
| 5516 | |
| 5517 void | |
| 5518 note_object_created (Lisp_Object obj) | |
| 5519 { | |
| 5520 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5521 { | |
| 5522 if (BUFFERP (obj)) | |
| 5523 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5524 } | |
| 5525 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5526 { | |
| 5527 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5528 || CONSOLEP (obj)) | |
| 5529 Vdeletable_permanent_display_objects = | |
| 5530 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5531 } | |
| 5532 } | |
| 5533 | |
| 5534 void | |
| 5535 note_object_deleted (Lisp_Object obj) | |
| 5536 { | |
| 5537 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5538 { | |
| 5539 if (BUFFERP (obj)) | |
| 5540 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5541 } | |
| 5542 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5543 { | |
| 5544 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5545 || CONSOLEP (obj)) | |
| 5546 Vdeletable_permanent_display_objects = | |
| 5547 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5548 } | |
| 5549 } | |
| 5550 | |
| 5551 struct call_trapping_problems | |
| 5552 { | |
| 5553 Lisp_Object catchtag; | |
| 5554 Lisp_Object error_conditions; | |
| 5555 Lisp_Object data; | |
| 5556 Lisp_Object backtrace; | |
| 5557 Lisp_Object warning_class; | |
| 5558 | |
| 867 | 5559 const CIbyte *warning_string; |
| 853 | 5560 Lisp_Object (*fun) (void *); |
| 5561 void *arg; | |
| 5562 }; | |
| 428 | 5563 |
| 2532 | 5564 static Lisp_Object |
| 5565 maybe_get_trapping_problems_backtrace (void) | |
| 5566 { | |
| 5567 Lisp_Object backtrace; | |
| 853 | 5568 |
| 1123 | 5569 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5570 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5571 { |
| 1333 | 5572 struct gcpro gcpro1; |
| 5573 Lisp_Object lstream = Qnil; | |
| 5574 int speccount = specpdl_depth (); | |
| 5575 | |
| 853 | 5576 /* We're no longer protected against errors or quit here, so at |
| 5577 least let's temporarily inhibit quit. We definitely do not | |
| 5578 want to inhibit quit during the calling of the function | |
| 5579 itself!!!!!!!!!!! */ | |
| 5580 | |
| 5581 specbind (Qinhibit_quit, Qt); | |
| 5582 | |
| 5583 GCPRO1 (lstream); | |
| 5584 lstream = make_resizing_buffer_output_stream (); | |
| 5585 Fbacktrace (lstream, Qt); | |
| 5586 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5587 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5588 Lstream_delete (XLSTREAM (lstream)); |
| 5589 UNGCPRO; | |
| 5590 | |
| 5591 unbind_to (speccount); | |
| 428 | 5592 } |
| 853 | 5593 else |
| 2532 | 5594 backtrace = Qnil; |
| 5595 | |
| 5596 return backtrace; | |
| 5597 } | |
| 5598 | |
| 5599 static DECLARE_DOESNT_RETURN_TYPE | |
| 5600 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5601 | |
| 5602 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5603 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5604 Lisp_Object opaque) | |
| 5605 { | |
| 5606 struct call_trapping_problems *p = | |
| 5607 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5608 | |
| 5609 if (!EQ (error_conditions, Qquit)) | |
| 5610 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5611 else | |
| 853 | 5612 p->backtrace = Qnil; |
| 5613 p->error_conditions = error_conditions; | |
| 5614 p->data = data; | |
| 5615 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5616 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5617 RETURN_NOT_REACHED (Qnil); |
| 853 | 5618 } |
| 5619 | |
| 5620 static Lisp_Object | |
| 5621 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5622 { | |
| 5623 struct call_trapping_problems *p = | |
| 5624 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5625 | |
| 5626 return (p->fun) (p->arg); | |
| 428 | 5627 } |
| 5628 | |
| 5629 static Lisp_Object | |
| 853 | 5630 call_trapping_problems_1 (Lisp_Object opaque) |
| 5631 { | |
| 5632 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5633 call_trapping_problems_2, opaque); | |
| 5634 } | |
| 5635 | |
| 1333 | 5636 static void |
| 5637 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5638 const CIbyte *warning_string, | |
| 5639 struct call_trapping_problems_result *p) | |
| 5640 { | |
| 5641 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5642 { | |
| 5643 int depth = specpdl_depth (); | |
| 5644 | |
| 5645 /* We're no longer protected against errors or quit here, so at | |
| 5646 least let's temporarily inhibit quit. */ | |
| 5647 specbind (Qinhibit_quit, Qt); | |
| 5648 | |
| 5649 if (p->caught_throw) | |
| 5650 { | |
| 5651 Lisp_Object errstr = | |
| 5652 emacs_sprintf_string_lisp | |
| 2532 | 5653 ("%s: Attempt to throw outside of function:" |
| 5654 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5655 Qnil, 4, |
| 1333 | 5656 build_msg_string (warning_string ? warning_string : "error"), |
| 2532 | 5657 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5658 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5659 } | |
| 2421 | 5660 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5661 { |
| 5662 Lisp_Object errstr; | |
| 5663 /* #### This should call | |
| 5664 (with-output-to-string (display-error (cons error_conditions | |
| 5665 data)) | |
| 5666 but that stuff is all in Lisp currently. */ | |
| 5667 errstr = | |
| 5668 emacs_sprintf_string_lisp | |
| 5669 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5670 Qnil, 4, | |
| 5671 build_msg_string (warning_string ? warning_string : "error"), | |
| 5672 p->error_conditions, p->data, p->backtrace); | |
| 5673 | |
| 5674 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5675 errstr); | |
| 5676 } | |
| 5677 | |
| 5678 unbind_to (depth); | |
| 5679 } | |
| 5680 } | |
| 5681 | |
| 1318 | 5682 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5683 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5684 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5685 use call_trapping_problems() for that. Turn the flags off with | |
| 5686 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5687 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5688 various other flags). */ | |
| 5689 | |
| 5690 int | |
| 5691 set_trapping_problems_flags (int flags) | |
| 5692 { | |
| 5693 int new_inhibit_flags; | |
| 5694 | |
| 5695 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5696 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5697 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5698 | INHIBIT_ENTERING_DEBUGGER | |
| 5699 | INHIBIT_WARNING_ISSUE | |
| 5700 | INHIBIT_GC; | |
| 5701 | |
| 5702 new_inhibit_flags = inhibit_flags | flags; | |
| 5703 if (new_inhibit_flags != inhibit_flags) | |
| 5704 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5705 | |
| 5706 if (flags & INHIBIT_QUIT) | |
| 5707 specbind (Qinhibit_quit, Qt); | |
| 5708 | |
| 5709 if (flags & UNINHIBIT_QUIT) | |
| 5710 begin_do_check_for_quit (); | |
| 5711 | |
| 5712 if (flags & INHIBIT_GC) | |
| 5713 begin_gc_forbidden (); | |
| 5714 | |
| 5715 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5716 inner one creates some buffers/etc., should the outer one be able | |
| 5717 to delete them? I think so, but it means we need to combine rather | |
| 5718 than just reset the value. */ | |
| 5719 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5720 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5721 | |
| 5722 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5723 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5724 | |
| 5725 return flags; | |
| 5726 } | |
| 5727 | |
| 853 | 5728 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5729 can be trapped or inhibited, according to FLAGS. | |
| 5730 | |
| 5731 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5732 the error is caught and a warning is issued, specifying the | |
| 5733 specific error that occurred and a backtrace. In that case, | |
| 5734 WARNING_STRING should be given, and will be printed at the | |
| 5735 beginning of the error to indicate where the error occurred. | |
| 5736 | |
| 5737 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5738 `throw' out of the function being called are trapped, and a warning | |
| 5739 issued. (Again, WARNING_STRING should be given.) | |
| 5740 | |
| 2367 | 5741 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5742 this applies to recursive invocations of call_trapping_problems, too. |
| 5743 | |
| 1333 | 5744 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5745 but values useful for generating a warning are still computed (in | |
| 5746 particular, the backtrace), so that the calling function can issue | |
| 5747 a warning. | |
| 5748 | |
| 853 | 5749 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5750 issued, but at level `debug', which normally is below the minimum | |
| 5751 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5752 be ignored entirely. The user can change this variable, however, | |
| 5753 to see the warnings.) | |
| 5754 | |
| 5755 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5756 given, you are *guaranteed* that there will be no non-local exits | |
| 5757 out of this function. | |
| 5758 | |
| 5759 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5760 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5761 automatically caught as well, and treated as an error; you can | |
| 5762 check for this using EQ (problems->error_conditions, Qquit). | |
| 5763 | |
| 5764 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5765 turned on. (It will abort the code being called, but will still be | |
| 5766 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5767 given.) This is useful when QUIT checking has been turned off by a | |
| 5768 higher-level caller. | |
| 5769 | |
| 5770 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5771 This is useful for Lisp called within redisplay, for example. |
| 853 | 5772 |
| 5773 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5774 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5775 or consoles that were already in existence at the time this function | |
| 5776 was called. (However, it's perfectly legal for code to create a new | |
| 5777 buffer and then delete it.) | |
| 5778 | |
| 5779 #### It might be useful to have a flag that inhibits deletion of a | |
| 5780 specific permanent display object and everything it's attached to | |
| 5781 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5782 attached to. | |
| 5783 | |
| 5784 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5785 code is not allowed to modify the text of any buffers that were | |
| 5786 already in existence at the time this function was called. | |
| 5787 (However, it's perfectly legal for code to create a new buffer and | |
| 5788 then modify its text.) | |
| 5789 | |
| 5790 [These last two flags are implemented using global variables | |
| 5791 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5792 which keep track of a list of all buffers or permanent display | |
| 5793 objects created since the last time one of these flags was set. | |
| 5794 The code that deletes buffers, etc. and modifies buffers checks | |
| 5795 | |
| 5796 (1) if the corresponding flag is set (through the global variable | |
| 5797 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5798 | |
| 5799 (2) if the object to be modified or deleted is not in the | |
| 5800 appropriate list. | |
| 5801 | |
| 5802 If so, it signals an error. | |
| 5803 | |
| 5804 Recursive calls to call_trapping_problems() are allowed. In | |
| 5805 the case of the two flags mentioned above, the current values | |
| 5806 of the global variables are stored in an unwind-protect, and | |
| 5807 they're reset to nil.] | |
| 5808 | |
| 5809 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5810 be entered if an error occurs inside the Lisp code being called, | |
| 5811 even when the user has requested an error. In such case, a warning | |
| 5812 is issued stating that access to the debugger is denied, unless | |
| 5813 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5814 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5815 in such cases either the display is in an inconsistent state or | |
| 5816 doing window operations is explicitly forbidden by the OS, and the | |
| 5817 debugger would causes visual changes on the screen and might create | |
| 5818 another frame. | |
| 5819 | |
| 5820 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5821 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5822 specifiers relating to display, other variables relating to | |
| 5823 display, splitting, deleting, or resizing windows or frames, | |
| 5824 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5825 allowed. This is for things called absolutely in the middle of | |
| 5826 redisplay, which expects things to be *exactly* the same after the | |
| 5827 call as before. This isn't completely implemented and needs to be | |
| 5828 thought out some more to determine exactly what its semantics are. | |
| 5829 For the moment, turning on this flag also turns on | |
| 5830 | |
| 5831 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5832 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5833 INHIBIT_ENTERING_DEBUGGER | |
| 5834 INHIBIT_WARNING_ISSUE | |
| 5835 INHIBIT_GC | |
| 5836 | |
| 5837 #### The following five flags are defined, but unimplemented: | |
| 5838 | |
| 5839 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5840 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5841 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5842 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5843 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5844 | |
| 5845 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5846 call_with_suspended_errors() was invoked. This exists only for | |
| 5847 debugging purposes -- often we want to break when a signal happens, | |
| 5848 but ignore signals from call_with_suspended_errors(), because they | |
| 5849 occur often and for legitimate reasons. | |
| 5850 | |
| 5851 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5852 which exact information about any occurring problems (either an | |
| 5853 error or an attempted throw past this boundary). | |
| 5854 | |
| 5855 If a problem occurred and aborted operation (error, quit, or | |
| 5856 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5857 from the call to (*fun) (arg) is returned. */ | |
| 5858 | |
| 5859 Lisp_Object | |
| 5860 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5861 const CIbyte *warning_string, |
| 853 | 5862 int flags, |
| 5863 struct call_trapping_problems_result *problem, | |
| 5864 Lisp_Object (*fun) (void *), | |
| 5865 void *arg) | |
| 5866 { | |
| 1318 | 5867 int speccount = specpdl_depth (); |
| 853 | 5868 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 5869 struct call_trapping_problems package; | |
| 1333 | 5870 struct call_trapping_problems_result real_problem; |
| 2532 | 5871 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 5872 int thrown = 0; |
| 5873 | |
| 5874 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 5875 assert (!NILP (warning_class)); | |
| 5876 | |
| 5877 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 5878 | |
| 5879 package.warning_class = warning_class; | |
| 5880 package.warning_string = warning_string; | |
| 5881 package.fun = fun; | |
| 5882 package.arg = arg; | |
| 5883 package.catchtag = | |
| 5884 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 5885 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 5886 Qnil; | |
| 5887 package.error_conditions = Qnil; | |
| 5888 package.data = Qnil; | |
| 5889 package.backtrace = Qnil; | |
| 5890 | |
| 1318 | 5891 flags = set_trapping_problems_flags (flags); |
| 853 | 5892 |
| 5893 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 5894 opaque = make_opaque_ptr (&package); | |
| 5895 else | |
| 5896 opaque = Qnil; | |
| 5897 | |
| 5898 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 5899 package.backtrace, opaque); | |
| 5900 | |
| 5901 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 5902 /* We need a catch so that our condition-handler can throw back here | |
| 5903 after printing the warning. (We print the warning in the stack | |
| 5904 context of the error, so we can get a backtrace.) */ | |
| 5905 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 5906 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5907 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 5908 /* We skip over the first wrapper, which traps errors. */ | |
| 5909 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 5910 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5911 else |
| 5912 /* Nothing special. */ | |
| 5913 tem = (fun) (arg); | |
| 5914 | |
| 1333 | 5915 if (!problem) |
| 5916 problem = &real_problem; | |
| 5917 | |
| 5918 if (!thrown) | |
| 853 | 5919 { |
| 1333 | 5920 problem->caught_error = 0; |
| 5921 problem->caught_throw = 0; | |
| 5922 problem->error_conditions = Qnil; | |
| 5923 problem->data = Qnil; | |
| 5924 problem->backtrace = Qnil; | |
| 5925 problem->thrown_tag = Qnil; | |
| 5926 problem->thrown_value = Qnil; | |
| 853 | 5927 } |
| 1333 | 5928 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 5929 { |
| 1333 | 5930 problem->caught_error = 1; |
| 5931 problem->caught_throw = 0; | |
| 5932 problem->error_conditions = package.error_conditions; | |
| 5933 problem->data = package.data; | |
| 5934 problem->backtrace = package.backtrace; | |
| 5935 problem->thrown_tag = Qnil; | |
| 5936 problem->thrown_value = Qnil; | |
| 853 | 5937 } |
| 1333 | 5938 else |
| 5939 { | |
| 5940 problem->caught_error = 0; | |
| 5941 problem->caught_throw = 1; | |
| 5942 problem->error_conditions = Qnil; | |
| 5943 problem->data = Qnil; | |
| 2532 | 5944 problem->backtrace = thrown_backtrace; |
| 1333 | 5945 problem->thrown_tag = thrown_tag; |
| 5946 problem->thrown_value = tem; | |
| 5947 } | |
| 5948 | |
| 5949 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 5950 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 5951 problem); | |
| 853 | 5952 |
| 5953 if (!NILP (package.catchtag) && | |
| 5954 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 5955 free_opaque_ptr (package.catchtag); | |
| 5956 | |
| 5957 if (!NILP (opaque)) | |
| 5958 free_opaque_ptr (opaque); | |
| 5959 | |
| 5960 unbind_to (speccount); | |
| 5961 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 5962 } | |
| 5963 | |
| 5964 struct va_call_trapping_problems | |
| 5965 { | |
| 5966 lisp_fn_t fun; | |
| 5967 int nargs; | |
| 5968 Lisp_Object *args; | |
| 5969 }; | |
| 5970 | |
| 5971 static Lisp_Object | |
| 5972 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 5973 { | |
| 5974 struct va_call_trapping_problems *ai_no_corrida = | |
| 5975 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 5976 Lisp_Object pegar_no_bumbum; | |
| 5977 | |
| 5978 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 5979 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 5980 return pegar_no_bumbum; | |
| 5981 } | |
| 5982 | |
| 5983 /* #### document me. */ | |
| 5984 | |
| 5985 Lisp_Object | |
| 5986 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5987 const CIbyte *warning_string, |
| 853 | 5988 int flags, |
| 5989 struct call_trapping_problems_result *problem, | |
| 5990 lisp_fn_t fun, int nargs, ...) | |
| 5991 { | |
| 5992 va_list vargs; | |
| 5993 Lisp_Object args[20]; | |
| 5994 int i; | |
| 5995 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 5996 struct gcpro gcpro1; | |
| 5997 | |
| 5998 assert (nargs >= 0 && nargs < 20); | |
| 5999 | |
| 6000 va_start (vargs, nargs); | |
| 6001 for (i = 0; i < nargs; i++) | |
| 6002 args[i] = va_arg (vargs, Lisp_Object); | |
| 6003 va_end (vargs); | |
| 6004 | |
| 6005 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6006 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6007 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6008 | |
| 6009 GCPRO1_ARRAY (args, nargs); | |
| 6010 RETURN_UNGCPRO | |
| 6011 (call_trapping_problems | |
| 6012 (warning_class, warning_string, flags, problem, | |
| 6013 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6014 } | |
| 6015 | |
| 6016 /* this is an older interface, barely different from | |
| 6017 va_call_trapping_problems. | |
| 6018 | |
| 6019 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6020 va_call_trapping_problems(). */ | |
| 6021 | |
| 6022 Lisp_Object | |
| 6023 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6024 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6025 int nargs, ...) |
| 6026 { | |
| 6027 va_list vargs; | |
| 6028 Lisp_Object args[20]; | |
| 6029 int i; | |
| 6030 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6031 int flags; | |
| 6032 struct gcpro gcpro1; | |
| 6033 | |
| 1204 | 6034 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6035 assert (!NILP (class_)); | |
| 853 | 6036 assert (nargs >= 0 && nargs < 20); |
| 6037 | |
| 6038 va_start (vargs, nargs); | |
| 6039 for (i = 0; i < nargs; i++) | |
| 6040 args[i] = va_arg (vargs, Lisp_Object); | |
| 6041 va_end (vargs); | |
| 6042 | |
| 6043 /* If error-checking is not disabled, just call the function. */ | |
| 6044 | |
| 6045 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6046 { | |
| 6047 Lisp_Object val; | |
| 6048 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6049 return val; | |
| 6050 } | |
| 6051 | |
| 6052 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6053 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6054 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6055 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6056 else | |
| 6057 { | |
| 6058 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6059 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6060 } | |
| 6061 | |
| 6062 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6063 | |
| 6064 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6065 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6066 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6067 | |
| 6068 GCPRO1_ARRAY (args, nargs); | |
| 6069 { | |
| 6070 Lisp_Object its_way_too_goddamn_late = | |
| 6071 call_trapping_problems | |
| 1204 | 6072 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6073 &fazer_invocacao_atrapalhando_problemas); |
| 6074 UNGCPRO; | |
| 6075 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6076 return retval; | |
| 6077 else | |
| 6078 return its_way_too_goddamn_late; | |
| 6079 } | |
| 6080 } | |
| 6081 | |
| 6082 struct calln_trapping_problems | |
| 6083 { | |
| 6084 int nargs; | |
| 6085 Lisp_Object *args; | |
| 6086 }; | |
| 6087 | |
| 6088 static Lisp_Object | |
| 6089 calln_trapping_problems_1 (void *puta) | |
| 6090 { | |
| 6091 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6092 | |
| 6093 return Ffuncall (p->nargs, p->args); | |
| 428 | 6094 } |
| 6095 | |
| 6096 static Lisp_Object | |
| 853 | 6097 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6098 const CIbyte *warning_string, int flags, |
| 853 | 6099 struct call_trapping_problems_result *problem, |
| 6100 int nargs, Lisp_Object *args) | |
| 6101 { | |
| 6102 struct calln_trapping_problems foo; | |
| 6103 struct gcpro gcpro1; | |
| 6104 | |
| 6105 if (SYMBOLP (args[0])) | |
| 6106 { | |
| 6107 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6108 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6109 { | |
| 6110 if (problem) | |
| 6111 { | |
| 6112 problem->caught_error = 0; | |
| 6113 problem->caught_throw = 0; | |
| 6114 problem->error_conditions = Qnil; | |
| 6115 problem->data = Qnil; | |
| 6116 problem->backtrace = Qnil; | |
| 6117 problem->thrown_tag = Qnil; | |
| 6118 problem->thrown_value = Qnil; | |
| 6119 } | |
| 6120 return Qnil; | |
| 6121 } | |
| 6122 } | |
| 6123 | |
| 6124 foo.nargs = nargs; | |
| 6125 foo.args = args; | |
| 6126 | |
| 6127 GCPRO1_ARRAY (args, nargs); | |
| 6128 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6129 flags, problem, | |
| 6130 calln_trapping_problems_1, | |
| 6131 &foo)); | |
| 6132 } | |
| 6133 | |
| 6134 /* #### fix these functions to follow the calling convention of | |
| 6135 call_trapping_problems! */ | |
| 6136 | |
| 6137 Lisp_Object | |
| 867 | 6138 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6139 int flags) |
| 6140 { | |
| 6141 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6142 &function); | |
| 428 | 6143 } |
| 6144 | |
| 6145 Lisp_Object | |
| 867 | 6146 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6147 Lisp_Object object, int flags) |
| 6148 { | |
| 6149 Lisp_Object args[2]; | |
| 6150 | |
| 6151 args[0] = function; | |
| 6152 args[1] = object; | |
| 6153 | |
| 6154 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6155 args); | |
| 6156 } | |
| 6157 | |
| 6158 Lisp_Object | |
| 867 | 6159 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6160 Lisp_Object object1, Lisp_Object object2, |
| 6161 int flags) | |
| 6162 { | |
| 6163 Lisp_Object args[3]; | |
| 6164 | |
| 6165 args[0] = function; | |
| 6166 args[1] = object1; | |
| 6167 args[2] = object2; | |
| 6168 | |
| 6169 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6170 args); | |
| 6171 } | |
| 6172 | |
| 6173 Lisp_Object | |
| 867 | 6174 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6175 Lisp_Object object1, Lisp_Object object2, |
| 6176 Lisp_Object object3, int flags) | |
| 6177 { | |
| 6178 Lisp_Object args[4]; | |
| 6179 | |
| 6180 args[0] = function; | |
| 6181 args[1] = object1; | |
| 6182 args[2] = object2; | |
| 6183 args[3] = object3; | |
| 6184 | |
| 6185 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6186 args); | |
| 6187 } | |
| 6188 | |
| 6189 Lisp_Object | |
| 867 | 6190 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6191 Lisp_Object object1, Lisp_Object object2, |
| 6192 Lisp_Object object3, Lisp_Object object4, | |
| 6193 int flags) | |
| 6194 { | |
| 6195 Lisp_Object args[5]; | |
| 6196 | |
| 6197 args[0] = function; | |
| 6198 args[1] = object1; | |
| 6199 args[2] = object2; | |
| 6200 args[3] = object3; | |
| 6201 args[4] = object4; | |
| 6202 | |
| 6203 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6204 args); | |
| 6205 } | |
| 6206 | |
| 6207 Lisp_Object | |
| 867 | 6208 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6209 Lisp_Object object1, Lisp_Object object2, |
| 6210 Lisp_Object object3, Lisp_Object object4, | |
| 6211 Lisp_Object object5, int flags) | |
| 6212 { | |
| 6213 Lisp_Object args[6]; | |
| 6214 | |
| 6215 args[0] = function; | |
| 6216 args[1] = object1; | |
| 6217 args[2] = object2; | |
| 6218 args[3] = object3; | |
| 6219 args[4] = object4; | |
| 6220 args[5] = object5; | |
| 6221 | |
| 6222 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6223 args); | |
| 6224 } | |
| 6225 | |
| 6226 struct eval_in_buffer_trapping_problems | |
| 6227 { | |
| 6228 struct buffer *buf; | |
| 6229 Lisp_Object form; | |
| 6230 }; | |
| 6231 | |
| 6232 static Lisp_Object | |
| 6233 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6234 { | |
| 6235 struct eval_in_buffer_trapping_problems *p = | |
| 6236 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6237 | |
| 6238 return eval_in_buffer (p->buf, p->form); | |
| 6239 } | |
| 6240 | |
| 6241 /* #### fix these functions to follow the calling convention of | |
| 6242 call_trapping_problems! */ | |
| 6243 | |
| 6244 Lisp_Object | |
| 867 | 6245 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6246 struct buffer *buf, Lisp_Object form, |
| 6247 int flags) | |
| 6248 { | |
| 6249 struct eval_in_buffer_trapping_problems p; | |
| 6250 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6251 struct gcpro gcpro1, gcpro2; |
| 6252 | |
| 853 | 6253 GCPRO2 (buffer, form); |
| 6254 p.buf = buf; | |
| 6255 p.form = form; | |
| 6256 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6257 eval_in_buffer_trapping_problems_1, | |
| 6258 &p)); | |
| 6259 } | |
| 6260 | |
| 6261 Lisp_Object | |
| 1333 | 6262 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6263 Lisp_Object hook_symbol, |
| 6264 int flags) | |
| 6265 { | |
| 1333 | 6266 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6267 RUN_HOOKS_TO_COMPLETION, |
| 6268 flags); | |
| 428 | 6269 } |
| 6270 | |
| 6271 static Lisp_Object | |
| 853 | 6272 safe_run_hook_trapping_problems_1 (void *puta) |
| 6273 { | |
| 6274 Lisp_Object hook = VOID_TO_LISP (puta); | |
| 6275 | |
| 6276 run_hook (hook); | |
| 428 | 6277 return Qnil; |
| 6278 } | |
| 6279 | |
| 853 | 6280 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6281 if an error occurs (but not a quit). */ | |
| 6282 | |
| 428 | 6283 Lisp_Object |
| 1333 | 6284 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6285 Lisp_Object hook_symbol, int flags) | |
| 853 | 6286 { |
| 428 | 6287 Lisp_Object tem; |
| 853 | 6288 struct gcpro gcpro1, gcpro2; |
| 6289 struct call_trapping_problems_result prob; | |
| 428 | 6290 |
| 6291 if (!initialized || preparing_for_armageddon) | |
| 6292 return Qnil; | |
| 6293 tem = find_symbol_value (hook_symbol); | |
| 6294 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6295 return Qnil; | |
| 6296 | |
| 853 | 6297 GCPRO2 (hook_symbol, tem); |
| 1333 | 6298 tem = call_trapping_problems (Qerror, NULL, |
| 6299 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6300 &prob, |
| 6301 safe_run_hook_trapping_problems_1, | |
| 6302 LISP_TO_VOID (hook_symbol)); | |
| 1333 | 6303 { |
| 6304 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6305 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6306 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6307 | |
| 6308 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6309 Qquit))) | |
| 6310 { | |
| 6311 Fset (hook_symbol, Qnil); | |
| 6312 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6313 } | |
| 6314 else | |
| 6315 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6316 | |
| 6317 | |
| 6318 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6319 &prob); | |
| 6320 } | |
| 6321 | |
| 6322 UNGCPRO; | |
| 6323 return tem; | |
| 853 | 6324 } |
| 6325 | |
| 6326 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6327 { | |
| 6328 struct buffer *buf; | |
| 6329 int nargs; | |
| 6330 Lisp_Object *args; | |
| 6331 enum run_hooks_condition cond; | |
| 6332 }; | |
| 6333 | |
| 6334 static Lisp_Object | |
| 6335 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6336 { | |
| 6337 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6338 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6339 | |
| 6340 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6341 porra->cond); | |
| 6342 } | |
| 6343 | |
| 6344 /* #### fix these functions to follow the calling convention of | |
| 6345 call_trapping_problems! */ | |
| 428 | 6346 |
| 6347 Lisp_Object | |
| 1333 | 6348 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6349 struct buffer *buf, int nargs, |
| 6350 Lisp_Object *args, | |
| 6351 enum run_hooks_condition cond, | |
| 6352 int flags) | |
| 6353 { | |
| 6354 Lisp_Object sym, val, ret; | |
| 6355 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6356 struct gcpro gcpro1; |
| 1333 | 6357 Lisp_Object hook_name; |
| 6358 Ibyte *hook_str; | |
| 6359 Ibyte *err; | |
| 428 | 6360 |
| 6361 if (!initialized || preparing_for_armageddon) | |
| 853 | 6362 /* We need to bail out of here pronto. */ |
| 428 | 6363 return Qnil; |
| 6364 | |
| 853 | 6365 GCPRO1_ARRAY (args, nargs); |
| 6366 | |
| 6367 sym = args[0]; | |
| 6368 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6369 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6370 | |
| 6371 if (UNBOUNDP (val) || NILP (val)) | |
| 6372 RETURN_UNGCPRO (ret); | |
| 6373 | |
| 6374 diversity_and_distrust.buf = buf; | |
| 6375 diversity_and_distrust.nargs = nargs; | |
| 6376 diversity_and_distrust.args = args; | |
| 6377 diversity_and_distrust.cond = cond; | |
| 6378 | |
| 1333 | 6379 hook_name = XSYMBOL_NAME (args[0]); |
| 6380 hook_str = XSTRING_DATA (hook_name); | |
| 6381 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6382 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6383 RETURN_UNGCPRO |
| 6384 (call_trapping_problems | |
| 1333 | 6385 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6386 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6387 &diversity_and_distrust)); | |
| 428 | 6388 } |
| 6389 | |
| 6390 Lisp_Object | |
| 1333 | 6391 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6392 int nargs, |
| 6393 Lisp_Object *args, | |
| 6394 enum run_hooks_condition cond, | |
| 6395 int flags) | |
| 6396 { | |
| 6397 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6398 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6399 } |
| 6400 | |
| 6401 Lisp_Object | |
| 1333 | 6402 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6403 Lisp_Object hook_var, |
| 6404 int nargs, ...) | |
| 6405 { | |
| 6406 /* This function can GC */ | |
| 6407 struct gcpro gcpro1; | |
| 6408 int i; | |
| 6409 va_list vargs; | |
| 6410 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6411 int flags; | |
| 6412 | |
| 6413 va_start (vargs, nargs); | |
| 6414 funcall_args[0] = hook_var; | |
| 6415 for (i = 0; i < nargs; i++) | |
| 6416 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6417 flags = va_arg (vargs, int); | |
| 6418 va_end (vargs); | |
| 6419 | |
| 6420 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6421 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6422 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6423 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6424 } |
| 6425 | |
| 6426 Lisp_Object | |
| 1333 | 6427 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6428 struct buffer *buf, |
| 6429 Lisp_Object hook_var, | |
| 6430 int nargs, ...) | |
| 6431 { | |
| 6432 /* This function can GC */ | |
| 6433 struct gcpro gcpro1; | |
| 6434 int i; | |
| 6435 va_list vargs; | |
| 6436 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6437 int flags; | |
| 6438 | |
| 6439 va_start (vargs, nargs); | |
| 6440 funcall_args[0] = hook_var; | |
| 6441 for (i = 0; i < nargs; i++) | |
| 6442 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6443 flags = va_arg (vargs, int); | |
| 6444 va_end (vargs); | |
| 6445 | |
| 6446 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6447 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6448 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6449 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6450 } |
| 6451 | |
| 6452 | |
| 6453 /************************************************************************/ | |
| 6454 /* The special binding stack */ | |
| 771 | 6455 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6456 /* When performance is critical, use the macros in backtrace.h. */ |
| 6457 /************************************************************************/ | |
| 6458 | |
| 6459 #define min_max_specpdl_size 400 | |
| 6460 | |
| 6461 void | |
| 647 | 6462 grow_specpdl (EMACS_INT reserved) |
| 6463 { | |
| 6464 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6465 if (size_needed >= max_specpdl_size) |
| 6466 { | |
| 6467 if (max_specpdl_size < min_max_specpdl_size) | |
| 6468 max_specpdl_size = min_max_specpdl_size; | |
| 6469 if (size_needed >= max_specpdl_size) | |
| 6470 { | |
| 1951 | 6471 /* Leave room for some specpdl in the debugger. */ |
| 6472 max_specpdl_size = size_needed + 100; | |
| 6473 if (max_specpdl_size > specpdl_size) | |
| 6474 { | |
| 6475 specpdl_size = max_specpdl_size; | |
| 6476 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6477 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6478 } | |
| 563 | 6479 signal_continuable_error |
| 6480 (Qstack_overflow, | |
| 6481 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6482 } |
| 6483 } | |
| 6484 while (specpdl_size < size_needed) | |
| 6485 { | |
| 6486 specpdl_size *= 2; | |
| 6487 if (specpdl_size > max_specpdl_size) | |
| 6488 specpdl_size = max_specpdl_size; | |
| 6489 } | |
| 6490 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6491 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6492 check_specbind_stack_sanity (); |
| 428 | 6493 } |
| 6494 | |
| 6495 | |
| 6496 /* Handle unbinding buffer-local variables */ | |
| 6497 static Lisp_Object | |
| 6498 specbind_unwind_local (Lisp_Object ovalue) | |
| 6499 { | |
| 6500 Lisp_Object current = Fcurrent_buffer (); | |
| 6501 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6502 Lisp_Object victim = ovalue; |
| 6503 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6504 ovalue = XCDR (victim); | |
| 428 | 6505 |
| 6506 free_cons (victim); | |
| 6507 | |
| 6508 if (NILP (buf)) | |
| 6509 { | |
| 6510 /* Deleted buffer -- do nothing */ | |
| 6511 } | |
| 6512 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6513 { | |
| 6514 /* Was buffer-local when binding was made, now no longer is. | |
| 6515 * (kill-local-variable can do this.) | |
| 6516 * Do nothing in this case. | |
| 6517 */ | |
| 6518 } | |
| 6519 else if (EQ (buf, current)) | |
| 6520 Fset (symbol, ovalue); | |
| 6521 else | |
| 6522 { | |
| 6523 /* Urk! Somebody switched buffers */ | |
| 6524 struct gcpro gcpro1; | |
| 6525 GCPRO1 (current); | |
| 6526 Fset_buffer (buf); | |
| 6527 Fset (symbol, ovalue); | |
| 6528 Fset_buffer (current); | |
| 6529 UNGCPRO; | |
| 6530 } | |
| 6531 return symbol; | |
| 6532 } | |
| 6533 | |
| 6534 static Lisp_Object | |
| 6535 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6536 { | |
| 6537 Lisp_Object current = Fcurrent_buffer (); | |
| 6538 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6539 | |
| 6540 buffer = get_buffer (buffer, 0); | |
| 6541 if (NILP (buffer)) | |
| 6542 { | |
| 6543 /* Deleted buffer -- do nothing */ | |
| 6544 } | |
| 6545 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6546 { | |
| 6547 /* Was buffer-local when binding was made, now no longer is. | |
| 6548 * (kill-local-variable can do this.) | |
| 6549 * Do nothing in this case. | |
| 6550 */ | |
| 6551 } | |
| 6552 else if (EQ (buffer, current)) | |
| 6553 Fkill_local_variable (symbol); | |
| 6554 else | |
| 6555 { | |
| 6556 /* Urk! Somebody switched buffers */ | |
| 6557 struct gcpro gcpro1; | |
| 6558 GCPRO1 (current); | |
| 6559 Fset_buffer (buffer); | |
| 6560 Fkill_local_variable (symbol); | |
| 6561 Fset_buffer (current); | |
| 6562 UNGCPRO; | |
| 6563 } | |
| 6564 return symbol; | |
| 6565 } | |
| 6566 | |
| 6567 | |
| 6568 void | |
| 6569 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6570 { | |
| 6571 SPECBIND (symbol, value); | |
| 853 | 6572 |
| 6573 check_specbind_stack_sanity (); | |
| 428 | 6574 } |
| 6575 | |
| 6576 void | |
| 6577 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6578 { | |
| 6579 int buffer_local = | |
| 6580 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6581 | |
| 6582 if (buffer_local == 0) | |
| 6583 { | |
| 6584 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6585 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6586 } |
| 6587 else if (buffer_local > 0) | |
| 6588 { | |
| 6589 /* Already buffer-local */ | |
| 6590 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6591 find_symbol_value (symbol)); | |
| 6592 specpdl_ptr->func = specbind_unwind_local; | |
| 6593 } | |
| 6594 else | |
| 6595 { | |
| 6596 /* About to become buffer-local */ | |
| 6597 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6598 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6599 } | |
| 6600 | |
| 6601 specpdl_ptr->symbol = symbol; | |
| 6602 specpdl_ptr++; | |
| 6603 specpdl_depth_counter++; | |
| 6604 | |
| 6605 Fset (symbol, value); | |
| 853 | 6606 |
| 6607 check_specbind_stack_sanity (); | |
| 428 | 6608 } |
| 6609 | |
| 771 | 6610 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6611 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6612 before your function returns normally, passing in the integer returned | |
| 6613 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6614 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6615 ignored. #### We should eliminate it entirely. */ | |
| 6616 | |
| 6617 int | |
| 428 | 6618 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6619 Lisp_Object arg) | |
| 6620 { | |
| 6621 SPECPDL_RESERVE (1); | |
| 6622 specpdl_ptr->func = function; | |
| 6623 specpdl_ptr->symbol = Qnil; | |
| 6624 specpdl_ptr->old_value = arg; | |
| 6625 specpdl_ptr++; | |
| 6626 specpdl_depth_counter++; | |
| 853 | 6627 check_specbind_stack_sanity (); |
| 771 | 6628 return specpdl_depth_counter - 1; |
| 6629 } | |
| 6630 | |
| 6631 static Lisp_Object | |
| 802 | 6632 restore_lisp_object (Lisp_Object cons) |
| 6633 { | |
| 6634 Lisp_Object opaque = XCAR (cons); | |
| 6635 Lisp_Object *addr = (Lisp_Object *) get_opaque_ptr (opaque); | |
| 6636 *addr = XCDR (cons); | |
| 6637 free_opaque_ptr (opaque); | |
| 853 | 6638 free_cons (cons); |
| 802 | 6639 return Qnil; |
| 6640 } | |
| 6641 | |
| 6642 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6643 by ADDR with the value VAL. */ | |
| 814 | 6644 static int |
| 802 | 6645 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6646 Lisp_Object val) | |
| 6647 { | |
| 6648 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6649 return record_unwind_protect (restore_lisp_object, | |
| 6650 noseeum_cons (opaque, val)); | |
| 6651 } | |
| 6652 | |
| 6653 /* Similar to specbind() but for any C variable whose value is a | |
| 6654 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6655 pointed to by ADDR to its existing value, and then changes its | |
| 6656 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6657 pass this to unbind_to() after you are done. */ | |
| 6658 int | |
| 6659 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6660 { | |
| 6661 int count = specpdl_depth (); | |
| 6662 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6663 *addr = newval; | |
| 6664 return count; | |
| 6665 } | |
| 6666 | |
| 6667 static Lisp_Object | |
| 6668 restore_int (Lisp_Object cons) | |
| 6669 { | |
| 6670 Lisp_Object opaque = XCAR (cons); | |
| 6671 Lisp_Object lval = XCDR (cons); | |
| 6672 int *addr = (int *) get_opaque_ptr (opaque); | |
| 6673 int val; | |
| 6674 | |
| 4025 | 6675 /* In the event that a C integer will always fit in an Emacs int, we |
| 6676 haven't ever stored a C integer as an opaque pointer. This #ifdef | |
| 6677 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6678 integers have 32 value bits. */ | |
| 6679 #if INT_VALBITS < INTBITS | |
| 802 | 6680 if (INTP (lval)) |
| 4025 | 6681 { |
| 6682 val = XINT (lval); | |
| 6683 } | |
| 802 | 6684 else |
| 6685 { | |
| 6686 val = (int) get_opaque_ptr (lval); | |
| 6687 free_opaque_ptr (lval); | |
| 6688 } | |
| 4025 | 6689 #else /* !(INT_VALBITS < INTBITS) */ |
| 6690 val = XINT(lval); | |
| 6691 #endif /* INT_VALBITS < INTBITS */ | |
| 802 | 6692 |
| 6693 *addr = val; | |
| 6694 free_opaque_ptr (opaque); | |
| 853 | 6695 free_cons (cons); |
| 802 | 6696 return Qnil; |
| 6697 } | |
| 6698 | |
| 6699 /* Establish an unwind-protect which will restore the int pointed to | |
| 6700 by ADDR with the value VAL. This function works correctly with | |
| 6701 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6702 int |
| 802 | 6703 record_unwind_protect_restoring_int (int *addr, int val) |
| 6704 { | |
| 6705 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6706 Lisp_Object lval; | |
| 6707 | |
| 4025 | 6708 /* In the event that a C integer will always fit in an Emacs int, we don't |
| 6709 ever want to store a C integer as an opaque pointer. This #ifdef | |
| 6710 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6711 integers have 32 value bits. */ | |
| 6712 #if INT_VALBITS <= INTBITS | |
| 802 | 6713 if (NUMBER_FITS_IN_AN_EMACS_INT (val)) |
| 6714 lval = make_int (val); | |
| 6715 else | |
| 6716 lval = make_opaque_ptr ((void *) val); | |
| 4025 | 6717 #else /* !(INT_VALBITS < INTBITS) */ |
| 6718 lval = make_int (val); | |
| 6719 #endif /* INT_VALBITS <= INTBITS */ | |
| 6720 | |
| 802 | 6721 return record_unwind_protect (restore_int, noseeum_cons (opaque, lval)); |
| 6722 } | |
| 6723 | |
| 6724 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6725 Sets up an unwind-protect to restore the variable pointed to by | |
| 6726 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6727 Returns the previous value of specpdl_depth(); pass this to | |
| 6728 unbind_to() after you are done. This function works correctly with | |
| 6729 all ints, even those that don't fit into a Lisp integer. */ | |
| 6730 int | |
| 6731 internal_bind_int (int *addr, int newval) | |
| 6732 { | |
| 6733 int count = specpdl_depth (); | |
| 6734 record_unwind_protect_restoring_int (addr, *addr); | |
| 6735 *addr = newval; | |
| 6736 return count; | |
| 6737 } | |
| 6738 | |
| 6739 static Lisp_Object | |
| 771 | 6740 free_pointer (Lisp_Object opaque) |
| 6741 { | |
| 1726 | 6742 xfree (get_opaque_ptr (opaque), void *); |
| 771 | 6743 free_opaque_ptr (opaque); |
| 6744 return Qnil; | |
| 6745 } | |
| 6746 | |
| 6747 /* Establish an unwind-protect which will free the specified block. | |
| 6748 */ | |
| 6749 int | |
| 6750 record_unwind_protect_freeing (void *ptr) | |
| 6751 { | |
| 6752 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6753 return record_unwind_protect (free_pointer, opaque); | |
| 6754 } | |
| 6755 | |
| 6756 static Lisp_Object | |
| 6757 free_dynarr (Lisp_Object opaque) | |
| 6758 { | |
| 6759 Dynarr_free (get_opaque_ptr (opaque)); | |
| 6760 free_opaque_ptr (opaque); | |
| 6761 return Qnil; | |
| 6762 } | |
| 6763 | |
| 6764 int | |
| 6765 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6766 { | |
| 6767 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6768 return record_unwind_protect (free_dynarr, opaque); | |
| 6769 } | |
| 428 | 6770 |
| 6771 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6772 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6773 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6774 Lisp_Object |
| 771 | 6775 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6776 { |
| 6777 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6778 check_specbind_stack_sanity (); |
| 428 | 6779 return value; |
| 6780 } | |
| 6781 | |
| 6782 /* Don't call this directly. | |
| 6783 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6784 void | |
| 6785 unbind_to_hairy (int count) | |
| 6786 { | |
| 442 | 6787 ++specpdl_ptr; |
| 6788 ++specpdl_depth_counter; | |
| 6789 | |
| 428 | 6790 while (specpdl_depth_counter != count) |
| 6791 { | |
| 1313 | 6792 Lisp_Object oquit = Qunbound; |
| 6793 | |
| 6794 /* Do this check BEFORE decrementing the values below, because once | |
| 6795 they're decremented, GC protection is lost on | |
| 6796 specpdl_ptr->old_value. */ | |
| 1322 | 6797 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6798 { |
| 6799 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6800 existing QUIT until afterwards. Only do this, however, for | |
| 6801 unwind-protects established by Lisp code, not by C code | |
| 6802 (e.g. free_opaque_ptr() or something), because the act of | |
| 6803 checking for QUIT can cause all sorts of weird things to | |
| 6804 happen, since it churns the event loop -- redisplay, running | |
| 6805 Lisp, etc. Code should not have to worry about this just | |
| 6806 because of establishing an unwind-protect. */ | |
| 6807 check_quit (); /* make Vquit_flag accurate */ | |
| 6808 oquit = Vquit_flag; | |
| 6809 Vquit_flag = Qnil; | |
| 6810 } | |
| 6811 | |
| 428 | 6812 --specpdl_ptr; |
| 6813 --specpdl_depth_counter; | |
| 6814 | |
| 1313 | 6815 /* #### At this point, there is no GC protection on old_value. This |
| 6816 could be a real problem, depending on what unwind-protect function | |
| 6817 is called. It looks like it just so happens that the ones | |
| 6818 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6819 we should look into fixing this. (Many unwind-protect functions | |
| 6820 free values. Is it a problem if freed values are | |
| 6821 GC-protected?) */ | |
| 428 | 6822 if (specpdl_ptr->func != 0) |
| 1313 | 6823 { |
| 6824 /* An unwind-protect */ | |
| 6825 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6826 } | |
| 6827 | |
| 428 | 6828 else |
| 6829 { | |
| 6830 /* We checked symbol for validity when we specbound it, | |
| 6831 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6832 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6833 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6834 sym->value = specpdl_ptr->old_value; | |
| 6835 else | |
| 6836 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6837 } | |
| 6838 | |
| 6839 #if 0 /* martin */ | |
| 6840 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6841 /* There should never be anything here for us to remove. | |
| 6842 If so, it indicates a logic error in Emacs. Catches | |
| 6843 should get removed when a throw or signal occurs, or | |
| 6844 when a catch or condition-case exits normally. But | |
| 6845 it's too dangerous to just remove this code. --ben */ | |
| 6846 | |
| 6847 /* Furthermore, this code is not in FSFmacs!!! | |
| 6848 Braino on mly's part? */ | |
| 6849 /* If we're unwound past the pdlcount of a catch frame, | |
| 6850 that catch can't possibly still be valid. */ | |
| 6851 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6852 { | |
| 6853 catchlist = catchlist->next; | |
| 6854 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6855 } | |
| 6856 #endif | |
| 6857 #endif | |
| 1313 | 6858 |
| 6859 if (!UNBOUNDP (oquit)) | |
| 6860 Vquit_flag = oquit; | |
| 428 | 6861 } |
| 853 | 6862 check_specbind_stack_sanity (); |
| 428 | 6863 } |
| 6864 | |
| 6865 | |
| 6866 | |
| 6867 /* Get the value of symbol's global binding, even if that binding is | |
| 6868 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6869 | |
| 6870 Lisp_Object | |
| 6871 top_level_value (Lisp_Object symbol) | |
| 6872 { | |
| 6873 REGISTER struct specbinding *ptr = specpdl; | |
| 6874 | |
| 6875 CHECK_SYMBOL (symbol); | |
| 6876 for (; ptr != specpdl_ptr; ptr++) | |
| 6877 { | |
| 6878 if (EQ (ptr->symbol, symbol)) | |
| 6879 return ptr->old_value; | |
| 6880 } | |
| 6881 return XSYMBOL (symbol)->value; | |
| 6882 } | |
| 6883 | |
| 6884 #if 0 | |
| 6885 | |
| 6886 Lisp_Object | |
| 6887 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6888 { | |
| 6889 REGISTER struct specbinding *ptr = specpdl; | |
| 6890 | |
| 6891 CHECK_SYMBOL (symbol); | |
| 6892 for (; ptr != specpdl_ptr; ptr++) | |
| 6893 { | |
| 6894 if (EQ (ptr->symbol, symbol)) | |
| 6895 { | |
| 6896 ptr->old_value = newval; | |
| 6897 return newval; | |
| 6898 } | |
| 6899 } | |
| 6900 return Fset (symbol, newval); | |
| 6901 } | |
| 6902 | |
| 6903 #endif /* 0 */ | |
| 6904 | |
| 6905 | |
| 6906 /************************************************************************/ | |
| 6907 /* Backtraces */ | |
| 6908 /************************************************************************/ | |
| 6909 | |
| 6910 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 6911 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 6912 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 6913 */ | |
| 6914 (level, flag)) | |
| 6915 { | |
| 6916 REGISTER struct backtrace *backlist = backtrace_list; | |
| 6917 REGISTER int i; | |
| 6918 | |
| 6919 CHECK_INT (level); | |
| 6920 | |
| 6921 for (i = 0; backlist && i < XINT (level); i++) | |
| 6922 { | |
| 6923 backlist = backlist->next; | |
| 6924 } | |
| 6925 | |
| 6926 if (backlist) | |
| 6927 backlist->debug_on_exit = !NILP (flag); | |
| 6928 | |
| 6929 return flag; | |
| 6930 } | |
| 6931 | |
| 6932 static void | |
| 6933 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 6934 { | |
| 6935 int printing_bindings = 0; | |
| 6936 | |
| 6937 for (; speccount > speclimit; speccount--) | |
| 6938 { | |
| 6939 if (specpdl[speccount - 1].func == 0 | |
| 6940 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 6941 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 6942 { | |
| 826 | 6943 write_c_string (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 6944 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 6945 printing_bindings = 1; | |
| 6946 } | |
| 6947 else | |
| 6948 { | |
| 826 | 6949 if (printing_bindings) write_c_string (stream, ")\n"); |
| 6950 write_c_string (stream, " # (unwind-protect ...)\n"); | |
| 428 | 6951 printing_bindings = 0; |
| 6952 } | |
| 6953 } | |
| 826 | 6954 if (printing_bindings) write_c_string (stream, ")\n"); |
| 428 | 6955 } |
| 6956 | |
| 1292 | 6957 static Lisp_Object |
| 6958 backtrace_unevalled_args (Lisp_Object *args) | |
| 6959 { | |
| 6960 if (args) | |
| 6961 return *args; | |
| 6962 else | |
| 6963 return list1 (build_string ("[internal]")); | |
| 6964 } | |
| 6965 | |
| 428 | 6966 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 6967 Print a trace of Lisp function calls currently active. | |
| 438 | 6968 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 6969 and defaults to the value of `standard-output'. |
| 6970 Optional second arg DETAILED non-nil means show places where currently | |
| 6971 active variable bindings, catches, condition-cases, and | |
| 6972 unwind-protects, as well as function calls, were made. | |
| 428 | 6973 */ |
| 6974 (stream, detailed)) | |
| 6975 { | |
| 6976 /* This function can GC */ | |
| 6977 struct backtrace *backlist = backtrace_list; | |
| 6978 struct catchtag *catches = catchlist; | |
| 6979 int speccount = specpdl_depth(); | |
| 6980 | |
| 6981 int old_nl = print_escape_newlines; | |
| 6982 int old_pr = print_readably; | |
| 6983 Lisp_Object old_level = Vprint_level; | |
| 6984 Lisp_Object oiq = Vinhibit_quit; | |
| 6985 struct gcpro gcpro1, gcpro2; | |
| 6986 | |
| 6987 /* We can't allow quits in here because that could cause the values | |
| 6988 of print_readably and print_escape_newlines to get screwed up. | |
| 6989 Normally we would use a record_unwind_protect but that would | |
| 6990 screw up the functioning of this function. */ | |
| 6991 Vinhibit_quit = Qt; | |
| 6992 | |
| 6993 entering_debugger = 0; | |
| 6994 | |
| 872 | 6995 if (!NILP (detailed)) |
| 6996 Vprint_level = make_int (50); | |
| 6997 else | |
| 6998 Vprint_level = make_int (3); | |
| 428 | 6999 print_readably = 0; |
| 7000 print_escape_newlines = 1; | |
| 7001 | |
| 7002 GCPRO2 (stream, old_level); | |
| 7003 | |
| 1261 | 7004 stream = canonicalize_printcharfun (stream); |
| 428 | 7005 |
| 7006 for (;;) | |
| 7007 { | |
| 7008 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7009 { | |
| 7010 int catchpdl = catches->pdlcount; | |
| 438 | 7011 if (speccount > catchpdl |
| 7012 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7013 /* This is a condition-case catchpoint */ |
| 7014 catchpdl = catchpdl + 1; | |
| 7015 | |
| 7016 backtrace_specials (speccount, catchpdl, stream); | |
| 7017 | |
| 7018 speccount = catches->pdlcount; | |
| 7019 if (catchpdl == speccount) | |
| 7020 { | |
| 826 | 7021 write_c_string (stream, " # (catch "); |
| 428 | 7022 Fprin1 (catches->tag, stream); |
| 826 | 7023 write_c_string (stream, " ...)\n"); |
| 428 | 7024 } |
| 7025 else | |
| 7026 { | |
| 826 | 7027 write_c_string (stream, " # (condition-case ... . "); |
| 428 | 7028 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
| 826 | 7029 write_c_string (stream, ")\n"); |
| 428 | 7030 } |
| 7031 catches = catches->next; | |
| 7032 } | |
| 7033 else if (!backlist) | |
| 7034 break; | |
| 7035 else | |
| 7036 { | |
| 7037 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7038 { | |
| 7039 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7040 speccount = backlist->pdlcount; | |
| 7041 } | |
| 826 | 7042 write_c_string (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7043 if (backlist->nargs == UNEVALLED) |
| 7044 { | |
| 1292 | 7045 Fprin1 (Fcons (*backlist->function, |
| 7046 backtrace_unevalled_args (backlist->args)), | |
| 7047 stream); | |
| 826 | 7048 write_c_string (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7049 } |
| 7050 else | |
| 7051 { | |
| 7052 Lisp_Object tem = *backlist->function; | |
| 7053 Fprin1 (tem, stream); /* This can QUIT */ | |
| 826 | 7054 write_c_string (stream, "("); |
| 428 | 7055 if (backlist->nargs == MANY) |
| 7056 { | |
| 7057 int i; | |
| 7058 Lisp_Object tail = Qnil; | |
| 7059 struct gcpro ngcpro1; | |
| 7060 | |
| 7061 NGCPRO1 (tail); | |
| 7062 for (tail = *backlist->args, i = 0; | |
| 7063 !NILP (tail); | |
| 7064 tail = Fcdr (tail), i++) | |
| 7065 { | |
| 826 | 7066 if (i != 0) write_c_string (stream, " "); |
| 428 | 7067 Fprin1 (Fcar (tail), stream); |
| 7068 } | |
| 7069 NUNGCPRO; | |
| 7070 } | |
| 7071 else | |
| 7072 { | |
| 7073 int i; | |
| 7074 for (i = 0; i < backlist->nargs; i++) | |
| 7075 { | |
| 826 | 7076 if (!i && EQ (tem, Qbyte_code)) |
| 7077 { | |
| 7078 write_c_string (stream, "\"...\""); | |
| 7079 continue; | |
| 7080 } | |
| 7081 if (i != 0) write_c_string (stream, " "); | |
| 428 | 7082 Fprin1 (backlist->args[i], stream); |
| 7083 } | |
| 7084 } | |
| 826 | 7085 write_c_string (stream, ")\n"); |
| 428 | 7086 } |
| 7087 backlist = backlist->next; | |
| 7088 } | |
| 7089 } | |
| 7090 Vprint_level = old_level; | |
| 7091 print_readably = old_pr; | |
| 7092 print_escape_newlines = old_nl; | |
| 7093 UNGCPRO; | |
| 7094 Vinhibit_quit = oiq; | |
| 7095 return Qnil; | |
| 7096 } | |
| 7097 | |
| 7098 | |
| 444 | 7099 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7100 Return the function and arguments NFRAMES up from current execution point. | |
| 428 | 7101 If that frame has not evaluated the arguments yet (or is a special form), |
| 7102 the value is (nil FUNCTION ARG-FORMS...). | |
| 7103 If that frame has evaluated its arguments and called its function already, | |
| 7104 the value is (t FUNCTION ARG-VALUES...). | |
| 7105 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7106 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7107 or a lambda expression for macro calls. | |
| 444 | 7108 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7109 */ |
| 7110 (nframes)) | |
| 7111 { | |
| 7112 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7113 REGISTER int i; | |
| 7114 Lisp_Object tem; | |
| 7115 | |
| 7116 CHECK_NATNUM (nframes); | |
| 7117 | |
| 7118 /* Find the frame requested. */ | |
| 7119 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7120 backlist = backlist->next; | |
| 7121 | |
| 7122 if (!backlist) | |
| 7123 return Qnil; | |
| 7124 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7125 return Fcons (Qnil, Fcons (*backlist->function, |
| 7126 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7127 else |
| 7128 { | |
| 7129 if (backlist->nargs == MANY) | |
| 7130 tem = *backlist->args; | |
| 7131 else | |
| 7132 tem = Flist (backlist->nargs, backlist->args); | |
| 7133 | |
| 7134 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7135 } | |
| 7136 } | |
| 7137 | |
| 7138 | |
| 7139 /************************************************************************/ | |
| 7140 /* Warnings */ | |
| 7141 /************************************************************************/ | |
| 7142 | |
| 1123 | 7143 static int |
| 7144 warning_will_be_discarded (Lisp_Object level) | |
| 7145 { | |
| 7146 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7147 to avoid excessive consing. */ | |
| 7148 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7149 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7150 } | |
| 7151 | |
| 428 | 7152 void |
| 1204 | 7153 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7154 Lisp_Object obj) |
| 7155 { | |
| 1123 | 7156 if (warning_will_be_discarded (level)) |
| 793 | 7157 return; |
| 1123 | 7158 |
| 1204 | 7159 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7160 if (NILP (Vpending_warnings)) |
| 7161 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7162 else | |
| 7163 { | |
| 7164 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7165 Vpending_warnings_tail = obj; | |
| 7166 } | |
| 7167 } | |
| 7168 | |
| 7169 /* #### This should probably accept Lisp objects; but then we have | |
| 7170 to make sure that Feval() isn't called, since it might not be safe. | |
| 7171 | |
| 7172 An alternative approach is to just pass some non-string type of | |
| 7173 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7174 automatically be called when it is safe to do so. */ | |
| 7175 | |
| 7176 void | |
| 1204 | 7177 warn_when_safe (Lisp_Object class_, Lisp_Object level, const CIbyte *fmt, ...) |
| 428 | 7178 { |
| 7179 Lisp_Object obj; | |
| 7180 va_list args; | |
| 7181 | |
| 1123 | 7182 if (warning_will_be_discarded (level)) |
| 793 | 7183 return; |
| 1123 | 7184 |
| 428 | 7185 va_start (args, fmt); |
| 771 | 7186 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 7187 va_end (args); |
| 7188 | |
| 1204 | 7189 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7190 } |
| 7191 | |
| 7192 | |
| 7193 | |
| 7194 | |
| 7195 /************************************************************************/ | |
| 7196 /* Initialization */ | |
| 7197 /************************************************************************/ | |
| 7198 | |
| 7199 void | |
| 7200 syms_of_eval (void) | |
| 7201 { | |
| 442 | 7202 INIT_LRECORD_IMPLEMENTATION (subr); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7203 INIT_LRECORD_IMPLEMENTATION (multiple_value); |
| 442 | 7204 |
| 563 | 7205 DEFSYMBOL (Qinhibit_quit); |
| 7206 DEFSYMBOL (Qautoload); | |
| 7207 DEFSYMBOL (Qdebug_on_error); | |
| 7208 DEFSYMBOL (Qstack_trace_on_error); | |
| 7209 DEFSYMBOL (Qdebug_on_signal); | |
| 7210 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7211 DEFSYMBOL (Qdebugger); | |
| 7212 DEFSYMBOL (Qmacro); | |
| 428 | 7213 defsymbol (&Qand_rest, "&rest"); |
| 7214 defsymbol (&Qand_optional, "&optional"); | |
| 7215 /* Note that the process code also uses Qexit */ | |
| 563 | 7216 DEFSYMBOL (Qexit); |
| 7217 DEFSYMBOL (Qsetq); | |
| 7218 DEFSYMBOL (Qinteractive); | |
| 7219 DEFSYMBOL (Qcommandp); | |
| 7220 DEFSYMBOL (Qdefun); | |
| 7221 DEFSYMBOL (Qprogn); | |
| 7222 DEFSYMBOL (Qvalues); | |
| 7223 DEFSYMBOL (Qdisplay_warning); | |
| 7224 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7225 DEFSYMBOL (Qfinalize_list); |
| 563 | 7226 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7227 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7228 DEFSYMBOL (Qobsolete_throw); |
| 428 | 7229 |
| 7230 DEFSUBR (For); | |
| 7231 DEFSUBR (Fand); | |
| 7232 DEFSUBR (Fif); | |
| 7233 DEFSUBR_MACRO (Fwhen); | |
| 7234 DEFSUBR_MACRO (Funless); | |
| 7235 DEFSUBR (Fcond); | |
| 7236 DEFSUBR (Fprogn); | |
| 7237 DEFSUBR (Fprog1); | |
| 7238 DEFSUBR (Fprog2); | |
| 7239 DEFSUBR (Fsetq); | |
| 7240 DEFSUBR (Fquote); | |
| 7241 DEFSUBR (Ffunction); | |
| 7242 DEFSUBR (Fdefun); | |
| 7243 DEFSUBR (Fdefmacro); | |
| 7244 DEFSUBR (Fdefvar); | |
| 7245 DEFSUBR (Fdefconst); | |
| 7246 DEFSUBR (Flet); | |
| 7247 DEFSUBR (FletX); | |
| 7248 DEFSUBR (Fwhile); | |
| 7249 DEFSUBR (Fmacroexpand_internal); | |
| 7250 DEFSUBR (Fcatch); | |
| 7251 DEFSUBR (Fthrow); | |
| 7252 DEFSUBR (Funwind_protect); | |
| 7253 DEFSUBR (Fcondition_case); | |
| 7254 DEFSUBR (Fcall_with_condition_handler); | |
| 7255 DEFSUBR (Fsignal); | |
| 7256 DEFSUBR (Finteractive_p); | |
| 7257 DEFSUBR (Fcommandp); | |
| 7258 DEFSUBR (Fcommand_execute); | |
| 7259 DEFSUBR (Fautoload); | |
| 7260 DEFSUBR (Feval); | |
| 7261 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7262 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7263 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7264 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7265 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7266 DEFSUBR (Fvalues_list); |
| 428 | 7267 DEFSUBR (Ffuncall); |
| 7268 DEFSUBR (Ffunctionp); | |
| 7269 DEFSUBR (Ffunction_min_args); | |
| 7270 DEFSUBR (Ffunction_max_args); | |
| 7271 DEFSUBR (Frun_hooks); | |
| 7272 DEFSUBR (Frun_hook_with_args); | |
| 7273 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7274 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7275 DEFSUBR (Fbacktrace_debug); | |
| 7276 DEFSUBR (Fbacktrace); | |
| 7277 DEFSUBR (Fbacktrace_frame); | |
| 7278 } | |
| 7279 | |
| 7280 void | |
| 814 | 7281 init_eval_semi_early (void) |
| 428 | 7282 { |
| 7283 specpdl_ptr = specpdl; | |
| 7284 specpdl_depth_counter = 0; | |
| 7285 catchlist = 0; | |
| 7286 Vcondition_handlers = Qnil; | |
| 7287 backtrace_list = 0; | |
| 7288 Vquit_flag = Qnil; | |
| 7289 debug_on_next_call = 0; | |
| 7290 lisp_eval_depth = 0; | |
| 7291 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7292 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7293 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7294 multiple_value_current_limit = 1; |
| 428 | 7295 } |
| 7296 | |
| 7297 void | |
| 7298 reinit_vars_of_eval (void) | |
| 7299 { | |
| 7300 preparing_for_armageddon = 0; | |
| 7301 in_warnings = 0; | |
| 7302 specpdl_size = 50; | |
| 7303 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7304 /* XEmacs change: increase these values. */ | |
| 7305 max_specpdl_size = 3000; | |
| 442 | 7306 max_lisp_eval_depth = 1000; |
| 7307 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7308 throw_level = 0; |
| 7309 #endif | |
| 2367 | 7310 init_eval_semi_early (); |
| 428 | 7311 } |
| 7312 | |
| 7313 void | |
| 7314 vars_of_eval (void) | |
| 7315 { | |
| 7316 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7317 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7318 */ ); | |
| 7319 | |
| 7320 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7321 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7322 This limit is to catch infinite recursions for you before they cause | |
| 7323 actual stack overflow in C, which would be fatal for Emacs. | |
| 7324 You can safely make it considerably larger than its default value, | |
| 7325 if that proves inconveniently small. | |
| 7326 */ ); | |
| 7327 | |
| 7328 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7329 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7330 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7331 Normally, you do not need to set this value yourself. It is set to | |
| 7332 t each time a Control-G is detected, and to `critical' each time a | |
| 7333 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7334 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7335 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7336 it's correct to do so. |
| 428 | 7337 */ ); |
| 7338 Vquit_flag = Qnil; | |
| 7339 | |
| 7340 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7341 Non-nil inhibits C-g quitting from happening immediately. | |
| 7342 Note that `quit-flag' will still be set by typing C-g, | |
| 7343 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7344 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7345 before making `inhibit-quit' nil. |
| 7346 | |
| 7347 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7348 requested by typing control-shift-G in a window-system frame; | |
| 7349 this is explained in more detail in `quit-flag'. | |
| 428 | 7350 */ ); |
| 7351 Vinhibit_quit = Qnil; | |
| 7352 | |
| 7353 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7354 *Non-nil means automatically display a backtrace buffer | |
| 7355 after any error that is not handled by a `condition-case'. | |
| 7356 If the value is a list, an error only means to display a backtrace | |
| 7357 if one of its condition symbols appears in the list. | |
| 7358 See also variable `stack-trace-on-signal'. | |
| 7359 */ ); | |
| 7360 Vstack_trace_on_error = Qnil; | |
| 7361 | |
| 7362 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7363 *Non-nil means automatically display a backtrace buffer | |
| 7364 after any error that is signalled, whether or not it is handled by | |
| 7365 a `condition-case'. | |
| 7366 If the value is a list, an error only means to display a backtrace | |
| 7367 if one of its condition symbols appears in the list. | |
| 7368 See also variable `stack-trace-on-error'. | |
| 7369 */ ); | |
| 7370 Vstack_trace_on_signal = Qnil; | |
| 7371 | |
| 7372 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7373 *List of errors for which the debugger should not be called. | |
| 7374 Each element may be a condition-name or a regexp that matches error messages. | |
| 7375 If any element applies to a given error, that error skips the debugger | |
| 7376 and just returns to top level. | |
| 7377 This overrides the variable `debug-on-error'. | |
| 7378 It does not apply to errors handled by `condition-case'. | |
| 7379 */ ); | |
| 7380 Vdebug_ignored_errors = Qnil; | |
| 7381 | |
| 7382 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7383 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7384 The debugger will not be entered if the error is handled by | |
| 7385 a `condition-case'. | |
| 7386 If the value is a list, an error only means to enter the debugger | |
| 7387 if one of its condition symbols appears in the list. | |
| 7388 This variable is overridden by `debug-ignored-errors'. | |
| 7389 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7390 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7391 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
|
7392 (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
|
7393 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
|
7394 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
|
7395 |
| 1123 | 7396 If this variable is set while XEmacs is running noninteractively (using |
| 7397 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7398 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7399 obviously won't work), XEmacs will break out to a C debugger using | |
| 7400 \(force-debugging-signal t). This is useful because debugging | |
| 7401 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7402 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7403 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7404 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7405 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7406 is about to die anyway, and if no debugger is present, this will usefully | |
| 7407 dump core.) The most useful way to set this flag when debugging | |
| 7408 noninteractive runs, especially in makefiles, is using the environment | |
| 7409 variable XEMACSDEBUG, like this: | |
| 771 | 7410 |
| 7411 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7412 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7413 */ ); |
| 7414 Vdebug_on_error = Qnil; | |
| 7415 | |
| 7416 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7417 *Non-nil means enter debugger if an error is signalled. | |
| 7418 The debugger will be entered whether or not the error is handled by | |
| 7419 a `condition-case'. | |
| 7420 If the value is a list, an error only means to enter the debugger | |
| 7421 if one of its condition symbols appears in the list. | |
| 7422 See also variable `debug-on-quit'. | |
| 1123 | 7423 |
| 7424 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7425 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7426 */ ); |
| 7427 Vdebug_on_signal = Qnil; | |
| 7428 | |
| 7429 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7430 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7431 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7432 debugger can also be achieved at any time (for X11 console) by typing | |
| 7433 control-shift-G to signal a critical quit. | |
| 7434 */ ); | |
| 7435 debug_on_quit = 0; | |
| 7436 | |
| 7437 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7438 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7439 */ ); | |
| 7440 | |
| 1292 | 7441 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7442 &backtrace_with_internal_sections /* | |
| 7443 Non-nil means backtraces will contain additional information indicating | |
| 7444 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7445 byte-char conversion, internal-external conversion, etc. This can be | |
| 7446 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7447 */ ); | |
| 7448 #ifdef ERROR_CHECK_STRUCTURES | |
| 7449 backtrace_with_internal_sections = 1; | |
| 7450 #else | |
| 7451 backtrace_with_internal_sections = 0; | |
| 7452 #endif | |
| 7453 | |
| 428 | 7454 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7455 Function to call to invoke debugger. | |
| 7456 If due to frame exit, args are `exit' and the value being returned; | |
| 7457 this function's value will be returned instead of that. | |
| 7458 If due to error, args are `error' and a list of the args to `signal'. | |
| 7459 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7460 If due to `eval' entry, one arg, t. | |
| 7461 */ ); | |
| 7462 Vdebugger = Qnil; | |
| 7463 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7464 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
|
7465 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
|
7466 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7467 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
|
7468 macros and special forms. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7469 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7470 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
|
7471 |
| 853 | 7472 staticpro (&Vcatch_everything_tag); |
| 7473 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7474 | |
| 428 | 7475 staticpro (&Vpending_warnings); |
| 7476 Vpending_warnings = Qnil; | |
| 1204 | 7477 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7478 Vpending_warnings_tail = Qnil; |
| 7479 | |
| 793 | 7480 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7481 Vlog_warning_minimum_level = Qinfo; | |
| 7482 | |
| 428 | 7483 staticpro (&Vautoload_queue); |
| 7484 Vautoload_queue = Qnil; | |
| 7485 | |
| 7486 staticpro (&Vcondition_handlers); | |
| 7487 | |
| 853 | 7488 staticpro (&Vdeletable_permanent_display_objects); |
| 7489 Vdeletable_permanent_display_objects = Qnil; | |
| 7490 | |
| 7491 staticpro (&Vmodifiable_buffers); | |
| 7492 Vmodifiable_buffers = Qnil; | |
| 7493 | |
| 7494 inhibit_flags = 0; | |
| 7495 } |