Mercurial > hg > xemacs-beta
annotate src/eval.c @ 5436:da1365dd3f07
Added GPLv3 or later license to modules/README.
| author | Mats Lidell <matsl@xemacs.org> |
|---|---|
| date | Sat, 13 Nov 2010 00:15:58 +0100 |
| parents | 308d34e9f07d |
| children | 8d29f1c4bb98 |
| rev | line source |
|---|---|
| 428 | 1 /* Evaluator for XEmacs Lisp interpreter. |
| 2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
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4 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2010 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
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8 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation, either version 3 of the License, or (at your |
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11 option) any later version. |
| 428 | 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 | |
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19 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 20 |
| 21 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */ | |
| 22 | |
| 853 | 23 /* Authorship: |
| 24 | |
| 25 Based on code from pre-release FSF 19, c. 1991. | |
| 26 Some work by Richard Mlynarik long ago (c. 1993?) -- | |
| 27 added call-with-condition-handler; synch. up to released FSF 19.7 | |
| 28 for lemacs 19.8. some signal changes. | |
| 29 Various work by Ben Wing, 1995-1996: | |
| 30 added all stuff dealing with trapping errors, suspended-errors, etc. | |
| 31 added most Fsignal front ends. | |
| 32 added warning code. | |
| 33 reworked the Fsignal code and synched the rest up to FSF 19.30. | |
| 34 Some changes by Martin Buchholz c. 1999? | |
| 35 e.g. PRIMITIVE_FUNCALL macros. | |
| 36 New call_trapping_problems code and large comments below | |
| 37 by Ben Wing, Mar-Apr 2000. | |
| 38 */ | |
| 39 | |
| 40 /* This file has been Mule-ized. */ | |
| 41 | |
| 42 /* What is in this file? | |
| 43 | |
| 44 This file contains the engine for the ELisp interpreter in XEmacs. | |
| 45 The engine does the actual work of implementing function calls, | |
| 46 form evaluation, non-local exits (catch, throw, signal, | |
| 47 condition-case, call-with-condition-handler), unwind-protects, | |
| 48 dynamic bindings, let constructs, backtraces, etc. You might say | |
| 49 that this module is the very heart of XEmacs, and everything else | |
| 50 in XEmacs is merely an auxiliary module implementing some specific | |
| 51 functionality that may be called from the heart at an appropriate | |
| 52 time. | |
| 53 | |
| 54 The only exception is the alloc.c module, which implements the | |
| 55 framework upon which this module (eval.c) works. alloc.c works | |
| 56 with creating the actual Lisp objects themselves and garbage | |
| 1960 | 57 collecting them as necessary, presenting a nice, high-level |
| 853 | 58 interface for object creation, deletion, access, and modification. |
| 59 | |
| 60 The only other exception that could be cited is the event-handling | |
| 61 module in event-stream.c. From its perspective, it is also the | |
| 62 heart of XEmacs, and controls exactly what gets done at what time. | |
| 63 From its perspective, eval.c is merely one of the auxiliary modules | |
| 64 out there that can be invoked by event-stream.c. | |
| 65 | |
| 66 Although the event-stream-centric view is a convenient fiction that | |
| 67 makes sense particularly from the user's perspective and from the | |
| 68 perspective of time, the engine-centric view is actually closest to | |
| 69 the truth, because anywhere within the event-stream module, you are | |
| 70 still somewhere in a Lisp backtrace, and event-loops are begun by | |
| 71 functions such as `command-loop-1', a Lisp function. | |
| 72 | |
| 73 As the Lisp engine is doing its thing, it maintains the state of | |
| 1960 | 74 the engine primarily in five list-like items, which are: |
| 853 | 75 |
| 76 -- the backtrace list | |
| 77 -- the catchtag list | |
| 78 -- the condition-handler list | |
| 79 -- the specbind list | |
| 80 -- the GCPRO list. | |
| 81 | |
| 82 These are described in detail in the next comment. | |
| 83 | |
| 84 --ben | |
| 85 */ | |
| 86 | |
| 87 /* Note that there are five separate lists used to maintain state in | |
| 88 the evaluator. All of them conceptually are stacks (last-in, | |
| 89 first-out). All non-local exits happen ultimately through the | |
| 90 catch/throw mechanism, which uses one of the five lists (the | |
| 91 catchtag list) and records the current state of the others in each | |
| 92 frame of the list (some other information is recorded and restored | |
| 93 as well, such as the current eval depth), so that all the state of | |
| 94 the evaluator is restored properly when a non-local exit occurs. | |
| 95 (Note that the current state of the condition-handler list is not | |
| 96 recorded in the catchtag list. Instead, when a condition-case or | |
| 97 call-with-condition-handler is set up, it installs an | |
| 98 unwind-protect on the specbind list to restore the appropriate | |
| 99 setting for the condition-handler list. During the course of | |
| 100 handling the non-local exit, all entries on the specbind list that | |
| 101 are past the location stored in the catch frame are "unwound" | |
| 102 (i.e. variable bindings are restored and unwind-protects are | |
| 103 executed), so the condition-handler list gets reset properly. | |
| 104 | |
| 105 The five lists are | |
| 106 | |
| 107 1. The backtrace list, which is chained through `struct backtrace's | |
| 108 declared in the stack frames of various primitives, and keeps | |
| 109 track of all Lisp function call entries and exits. | |
| 110 2. The catchtag list, which is chained through `struct catchtag's | |
| 111 declared in the stack frames of internal_catch and condition_case_1, | |
| 112 and keeps track of information needed to reset the internal state | |
| 113 of the evaluator to the state that was current when the catch or | |
| 114 condition-case were established, in the event of a non-local exit. | |
| 115 3. The condition-handler list, which is a simple Lisp list with new | |
| 116 entries consed onto the front of the list. It records condition-cases | |
| 117 and call-with-condition-handlers established either from C or from | |
| 118 Lisp. Unlike with the other lists (but similar to everything else | |
| 119 of a similar nature in the rest of the C and Lisp code), it takes care | |
| 120 of restoring itself appropriately in the event of a non-local exit | |
| 121 through the use of the unwind-protect mechanism. | |
| 122 4. The specbind list, which is a contiguous array of `struct specbinding's, | |
| 123 expanded as necessary using realloc(). It holds dynamic variable | |
| 124 bindings (the only kind we currently have in ELisp) and unwind-protects. | |
| 125 5. The GCPRO list, which is chained through `struct gcpro's declared in | |
| 126 the stack frames of any functions that need to GC-protect Lisp_Objects | |
| 127 declared on the stack. This is one of the most fragile areas of the | |
| 128 entire scheme -- you must not forget to UNGCPRO at the end of your | |
| 129 function, you must make sure you GCPRO in many circumstances you don't | |
| 130 think you have to, etc. See the internals manual for more information | |
| 131 about this. | |
| 132 | |
| 133 --ben | |
| 134 */ | |
| 135 | |
| 428 | 136 #include <config.h> |
| 137 #include "lisp.h" | |
| 138 | |
| 139 #include "commands.h" | |
| 140 #include "backtrace.h" | |
| 141 #include "bytecode.h" | |
| 142 #include "buffer.h" | |
| 872 | 143 #include "console-impl.h" |
| 853 | 144 #include "device.h" |
| 145 #include "frame.h" | |
| 146 #include "lstream.h" | |
| 428 | 147 #include "opaque.h" |
| 1292 | 148 #include "profile.h" |
| 853 | 149 #include "window.h" |
| 428 | 150 |
| 151 struct backtrace *backtrace_list; | |
| 152 | |
| 153 /* Macros for calling subrs with an argument list whose length is only | |
| 154 known at runtime. See EXFUN and DEFUN for similar hackery. */ | |
| 155 | |
| 156 #define AV_0(av) | |
| 157 #define AV_1(av) av[0] | |
| 158 #define AV_2(av) AV_1(av), av[1] | |
| 159 #define AV_3(av) AV_2(av), av[2] | |
| 160 #define AV_4(av) AV_3(av), av[3] | |
| 161 #define AV_5(av) AV_4(av), av[4] | |
| 162 #define AV_6(av) AV_5(av), av[5] | |
| 163 #define AV_7(av) AV_6(av), av[6] | |
| 164 #define AV_8(av) AV_7(av), av[7] | |
| 165 | |
| 166 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \ | |
| 444 | 167 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av))) |
| 428 | 168 |
| 169 /* If subrs take more than 8 arguments, more cases need to be added | |
| 170 to this switch. (But wait - don't do it - if you really need | |
| 171 a SUBR with more than 8 arguments, use max_args == MANY. | |
| 853 | 172 Or better, considering using a property list as one of your args. |
| 428 | 173 See the DEFUN macro in lisp.h) */ |
| 174 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \ | |
| 175 void (*PF_fn)(void) = (void (*)(void)) fn; \ | |
| 176 Lisp_Object *PF_av = (av); \ | |
| 177 switch (ac) \ | |
| 178 { \ | |
| 436 | 179 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \ |
| 428 | 180 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \ |
| 181 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \ | |
| 182 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \ | |
| 183 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \ | |
| 184 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \ | |
| 185 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \ | |
| 186 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \ | |
| 187 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \ | |
| 188 } \ | |
| 189 } while (0) | |
| 190 | |
| 191 #define FUNCALL_SUBR(rv, subr, av, ac) \ | |
| 192 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac); | |
| 193 | |
| 194 | |
| 195 /* This is the list of current catches (and also condition-cases). | |
| 853 | 196 This is a stack: the most recent catch is at the head of the list. |
| 197 The list is threaded through the stack frames of the C functions | |
| 198 that set up the catches; this is similar to the way the GCPRO list | |
| 199 is handled, but different from the condition-handler list (which is | |
| 200 a simple Lisp list) and the specbind stack, which is a contiguous | |
| 201 array of `struct specbinding's, grown (using realloc()) as | |
| 202 necessary. (Note that all four of these lists behave as a stacks.) | |
| 203 | |
| 3025 | 204 Catches are created by declaring a `struct catchtag' locally, |
| 853 | 205 filling the .TAG field in with the tag, and doing a setjmp() on |
| 206 .JMP. Fthrow() will store the value passed to it in .VAL and | |
| 207 longjmp() back to .JMP, back to the function that established the | |
| 208 catch. This will always be either internal_catch() (catches | |
| 209 established internally or through `catch') or condition_case_1 | |
| 210 (condition-cases established internally or through | |
| 211 `condition-case'). | |
| 428 | 212 |
| 213 The catchtag also records the current position in the | |
| 214 call stack (stored in BACKTRACE_LIST), the current position | |
| 215 in the specpdl stack (used for variable bindings and | |
| 216 unwind-protects), the value of LISP_EVAL_DEPTH, and the | |
| 217 current position in the GCPRO stack. All of these are | |
| 218 restored by Fthrow(). | |
| 853 | 219 */ |
| 428 | 220 |
| 221 struct catchtag *catchlist; | |
| 222 | |
| 853 | 223 /* A special tag that can be used internally from C code to catch |
| 224 every attempt to throw past this level. */ | |
| 225 Lisp_Object Vcatch_everything_tag; | |
| 226 | |
| 428 | 227 Lisp_Object Qautoload, Qmacro, Qexit; |
| 228 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues; | |
| 229 Lisp_Object Vquit_flag, Vinhibit_quit; | |
| 230 Lisp_Object Qand_rest, Qand_optional; | |
| 231 Lisp_Object Qdebug_on_error, Qstack_trace_on_error; | |
| 232 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal; | |
| 233 Lisp_Object Qdebugger; | |
| 234 Lisp_Object Qinhibit_quit; | |
| 887 | 235 Lisp_Object Qfinalize_list; |
| 428 | 236 Lisp_Object Qrun_hooks; |
| 237 Lisp_Object Qsetq; | |
| 238 Lisp_Object Qdisplay_warning; | |
| 239 Lisp_Object Vpending_warnings, Vpending_warnings_tail; | |
| 240 Lisp_Object Qif; | |
| 241 | |
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242 Lisp_Object Qthrow; |
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243 Lisp_Object Qobsolete_throw; |
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244 Lisp_Object Qmultiple_value_list_internal; |
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245 |
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246 static int first_desired_multiple_value; |
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247 /* Used outside this file, somewhat uncleanly, in the IGNORE_MULTIPLE_VALUES |
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248 macro: */ |
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249 int multiple_value_current_limit; |
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250 |
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251 Fixnum Vmultiple_values_limit; |
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252 |
| 853 | 253 /* Flags specifying which operations are currently inhibited. */ |
| 254 int inhibit_flags; | |
| 255 | |
| 256 /* Buffers, frames, windows, devices, and consoles created since most | |
| 257 recent active | |
| 258 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION). | |
| 259 */ | |
| 260 Lisp_Object Vdeletable_permanent_display_objects; | |
| 261 | |
| 262 /* Buffers created since most recent active | |
| 263 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */ | |
| 264 Lisp_Object Vmodifiable_buffers; | |
| 793 | 265 |
| 266 /* Minimum level at which warnings are logged. Below this, they're ignored | |
| 267 entirely -- not even generated. */ | |
| 268 Lisp_Object Vlog_warning_minimum_level; | |
| 269 | |
| 428 | 270 /* Non-nil means record all fset's and provide's, to be undone |
| 271 if the file being autoloaded is not fully loaded. | |
| 272 They are recorded by being consed onto the front of Vautoload_queue: | |
| 273 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
| 274 Lisp_Object Vautoload_queue; | |
| 275 | |
| 276 /* Current number of specbindings allocated in specpdl. */ | |
| 277 int specpdl_size; | |
| 278 | |
| 279 /* Pointer to beginning of specpdl. */ | |
| 280 struct specbinding *specpdl; | |
| 281 | |
| 282 /* Pointer to first unused element in specpdl. */ | |
| 283 struct specbinding *specpdl_ptr; | |
| 284 | |
| 285 /* specpdl_ptr - specpdl */ | |
| 286 int specpdl_depth_counter; | |
| 287 | |
| 288 /* Maximum size allowed for specpdl allocation */ | |
| 458 | 289 Fixnum max_specpdl_size; |
| 428 | 290 |
| 291 /* Depth in Lisp evaluations and function calls. */ | |
| 1292 | 292 int lisp_eval_depth; |
| 428 | 293 |
| 294 /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
| 458 | 295 Fixnum max_lisp_eval_depth; |
| 428 | 296 |
| 297 /* Nonzero means enter debugger before next function call */ | |
| 298 static int debug_on_next_call; | |
| 299 | |
| 1292 | 300 int backtrace_with_internal_sections; |
| 301 | |
| 428 | 302 /* List of conditions (non-nil atom means all) which cause a backtrace |
| 303 if an error is handled by the command loop's error handler. */ | |
| 304 Lisp_Object Vstack_trace_on_error; | |
| 305 | |
| 306 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 307 if an error is handled by the command loop's error handler. */ | |
| 308 Lisp_Object Vdebug_on_error; | |
| 309 | |
| 310 /* List of conditions and regexps specifying error messages which | |
| 311 do not enter the debugger even if Vdebug_on_error says they should. */ | |
| 312 Lisp_Object Vdebug_ignored_errors; | |
| 313 | |
| 314 /* List of conditions (non-nil atom means all) which cause a backtrace | |
| 315 if any error is signalled. */ | |
| 316 Lisp_Object Vstack_trace_on_signal; | |
| 317 | |
| 318 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 319 if any error is signalled. */ | |
| 320 Lisp_Object Vdebug_on_signal; | |
| 321 | |
| 322 /* Nonzero means enter debugger if a quit signal | |
| 323 is handled by the command loop's error handler. | |
| 324 | |
| 325 From lisp, this is a boolean variable and may have the values 0 and 1. | |
| 326 But, eval.c temporarily uses the second bit of this variable to indicate | |
| 327 that a critical_quit is in progress. The second bit is reset immediately | |
| 328 after it is processed in signal_call_debugger(). */ | |
| 329 int debug_on_quit; | |
| 330 | |
| 331 #if 0 /* FSFmacs */ | |
| 332 /* entering_debugger is basically equivalent */ | |
| 333 /* The value of num_nonmacro_input_chars as of the last time we | |
| 334 started to enter the debugger. If we decide to enter the debugger | |
| 335 again when this is still equal to num_nonmacro_input_chars, then we | |
| 336 know that the debugger itself has an error, and we should just | |
| 337 signal the error instead of entering an infinite loop of debugger | |
| 338 invocations. */ | |
| 339 int when_entered_debugger; | |
| 340 #endif | |
| 341 | |
| 342 /* Nonzero means we are trying to enter the debugger. | |
| 343 This is to prevent recursive attempts. | |
| 344 Cleared by the debugger calling Fbacktrace */ | |
| 345 static int entering_debugger; | |
| 346 | |
| 347 /* Function to call to invoke the debugger */ | |
| 348 Lisp_Object Vdebugger; | |
| 349 | |
| 853 | 350 /* List of condition handlers currently in effect. |
| 351 The elements of this lists were at one point in the past | |
| 352 threaded through the stack frames of Fcondition_case and | |
| 353 related functions, but now are stored separately in a normal | |
| 354 stack. When an error is signaled (by calling Fsignal, below), | |
| 355 this list is searched for an element that applies. | |
| 428 | 356 |
| 357 Each element of this list is one of the following: | |
| 358 | |
| 853 | 359 -- A list of a handler function and possibly args to pass to the |
| 360 function. This is a handler established with the Lisp primitive | |
| 361 `call-with-condition-handler' or related C function | |
| 362 call_with_condition_handler(): | |
| 363 | |
| 364 If the handler function is an opaque ptr object, it is a handler | |
| 365 that was established in C using call_with_condition_handler(), | |
| 366 and the contents of the object are a function pointer which takes | |
| 367 three arguments, the signal name and signal data (same arguments | |
| 368 passed to `signal') and a third Lisp_Object argument, specified | |
| 369 in the call to call_with_condition_handler() and stored as the | |
| 370 second element of the list containing the handler functionl. | |
| 371 | |
| 372 If the handler function is a regular Lisp_Object, it is a handler | |
| 373 that was established using `call-with-condition-handler'. | |
| 374 Currently there are no more arguments in the list containing the | |
| 375 handler function, and only one argument is passed to the handler | |
| 376 function: a cons of the signal name and signal data arguments | |
| 377 passed to `signal'. | |
| 378 | |
| 379 -- A list whose car is Qunbound and whose cdr is Qt. This is a | |
| 380 special condition-case handler established by C code with | |
| 381 condition_case_1(). All errors are trapped; the debugger is not | |
| 382 invoked even if `debug-on-error' was set. | |
| 383 | |
| 384 -- A list whose car is Qunbound and whose cdr is Qerror. This is a | |
| 385 special condition-case handler established by C code with | |
| 386 condition_case_1(). It is like Qt except that the debugger is | |
| 387 invoked normally if it is called for. | |
| 388 | |
| 389 -- A list whose car is Qunbound and whose cdr is a list of lists | |
| 390 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is | |
| 391 a normal `condition-case' handler. | |
| 392 | |
| 393 Note that in all cases *except* the first, there is a corresponding | |
| 394 catch, whose TAG is the value of Vcondition_handlers just after the | |
| 395 handler data just described is pushed onto it. The reason is that | |
| 396 `condition-case' handlers need to throw back to the place where the | |
| 397 handler was installed before invoking it, while | |
| 398 `call-with-condition-handler' handlers are invoked in the | |
| 399 environment that `signal' was invoked in. */ | |
| 400 | |
| 401 | |
| 428 | 402 static Lisp_Object Vcondition_handlers; |
| 403 | |
| 853 | 404 /* I think we should keep this enabled all the time, not just when |
| 405 error checking is enabled, because if one of these puppies pops up, | |
| 406 it will trash the stack if not caught, making it that much harder to | |
| 407 debug. It doesn't cause speed loss. */ | |
| 442 | 408 #define DEFEND_AGAINST_THROW_RECURSION |
| 409 | |
| 410 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 411 /* Used for error catching purposes by throw_or_bomb_out */ |
| 412 static int throw_level; | |
| 442 | 413 #endif |
| 414 | |
| 1123 | 415 static int warning_will_be_discarded (Lisp_Object level); |
| 2532 | 416 static Lisp_Object maybe_get_trapping_problems_backtrace (void); |
| 1123 | 417 |
| 428 | 418 |
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420 /* When parsing keyword arguments; is some element of NARGS |
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421 :allow-other-keys, and is that element followed by a non-nil Lisp |
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422 object? */ |
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423 |
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424 Boolint |
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425 non_nil_allow_other_keys_p (Elemcount offset, int nargs, Lisp_Object *args) |
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426 { |
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427 Lisp_Object key, value; |
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428 while (offset + 1 < nargs) |
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429 { |
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430 key = args[offset++]; |
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431 value = args[offset++]; |
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432 if (EQ (key, Q_allow_other_keys)) |
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433 { |
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434 /* The ANSI Common Lisp standard says the first value for a given |
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435 keyword overrides. */ |
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436 return !NILP (value); |
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437 } |
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438 } |
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439 return 0; |
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440 } |
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441 |
| 428 | 442 /************************************************************************/ |
| 443 /* The subr object type */ | |
| 444 /************************************************************************/ | |
| 445 | |
| 446 static void | |
| 2286 | 447 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag)) |
| 428 | 448 { |
| 449 Lisp_Subr *subr = XSUBR (obj); | |
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450 const Ascbyte *header = |
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451 (subr->max_args == UNEVALLED) ? "#<special-operator " : "#<subr "; |
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452 const Ascbyte *name = subr_name (subr); |
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453 const Ascbyte *trailer = subr->prompt ? " (interactive)>" : ">"; |
| 428 | 454 |
| 455 if (print_readably) | |
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456 printing_unreadable_object_fmt ("%s%s%s", header, name, trailer); |
| 428 | 457 |
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458 write_ascstring (printcharfun, header); |
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459 write_ascstring (printcharfun, name); |
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460 write_ascstring (printcharfun, trailer); |
| 428 | 461 } |
| 462 | |
| 1204 | 463 static const struct memory_description subr_description[] = { |
| 2551 | 464 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 428 | 465 { XD_END } |
| 466 }; | |
| 467 | |
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468 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("subr", subr, |
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469 0, print_subr, 0, 0, 0, |
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470 subr_description, |
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471 Lisp_Subr); |
| 428 | 472 |
| 473 /************************************************************************/ | |
| 474 /* Entering the debugger */ | |
| 475 /************************************************************************/ | |
| 476 | |
| 853 | 477 static Lisp_Object |
| 478 current_warning_level (void) | |
| 479 { | |
| 480 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL) | |
| 481 return Qdebug; | |
| 482 else | |
| 483 return Qwarning; | |
| 484 } | |
| 485 | |
| 428 | 486 /* Actually call the debugger. ARG is a list of args that will be |
| 487 passed to the debugger function, as follows; | |
| 488 | |
| 489 If due to frame exit, args are `exit' and the value being returned; | |
| 490 this function's value will be returned instead of that. | |
| 491 If due to error, args are `error' and a list of the args to `signal'. | |
| 492 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 493 If due to `eval' entry, one arg, t. | |
| 494 | |
| 495 */ | |
| 496 | |
| 497 static Lisp_Object | |
| 498 call_debugger_259 (Lisp_Object arg) | |
| 499 { | |
| 500 return apply1 (Vdebugger, arg); | |
| 501 } | |
| 502 | |
| 503 /* Call the debugger, doing some encapsulation. We make sure we have | |
| 504 some room on the eval and specpdl stacks, and bind entering_debugger | |
| 505 to 1 during this call. This is used to trap errors that may occur | |
| 506 when entering the debugger (e.g. the value of `debugger' is invalid), | |
| 507 so that the debugger will not be recursively entered if debug-on-error | |
| 508 is set. (Otherwise, XEmacs would infinitely recurse, attempting to | |
| 509 enter the debugger.) entering_debugger gets reset to 0 as soon | |
| 510 as a backtrace is displayed, so that further errors can indeed be | |
| 511 handled normally. | |
| 512 | |
| 3025 | 513 We also establish a catch for `debugger'. If the debugger function |
| 428 | 514 throws to this instead of returning a value, it means that the user |
| 515 pressed 'c' (pretend like the debugger was never entered). The | |
| 516 function then returns Qunbound. (If the user pressed 'r', for | |
| 517 return a value, then the debugger function returns normally with | |
| 518 this value.) | |
| 519 | |
| 520 The difference between 'c' and 'r' is as follows: | |
| 521 | |
| 522 debug-on-call: | |
| 523 No difference. The call proceeds as normal. | |
| 524 debug-on-exit: | |
| 525 With 'r', the specified value is returned as the function's | |
| 526 return value. With 'c', the value that would normally be | |
| 527 returned is returned. | |
| 528 signal: | |
| 529 With 'r', the specified value is returned as the return | |
| 530 value of `signal'. (This is the only time that `signal' | |
| 531 can return, instead of making a non-local exit.) With `c', | |
| 532 `signal' will continue looking for handlers as if the | |
| 533 debugger was never entered, and will probably end up | |
| 534 throwing to a handler or to top-level. | |
| 535 */ | |
| 536 | |
| 537 static Lisp_Object | |
| 538 call_debugger (Lisp_Object arg) | |
| 539 { | |
| 540 int threw; | |
| 541 Lisp_Object val; | |
| 542 int speccount; | |
| 543 | |
| 853 | 544 debug_on_next_call = 0; |
| 545 | |
| 546 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER) | |
| 547 { | |
| 548 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE)) | |
| 549 warn_when_safe | |
| 550 (Qdebugger, current_warning_level (), | |
| 551 "Unable to enter debugger within critical section"); | |
| 552 return Qunbound; | |
| 553 } | |
| 554 | |
| 428 | 555 if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
| 556 max_lisp_eval_depth = lisp_eval_depth + 20; | |
| 557 if (specpdl_size + 40 > max_specpdl_size) | |
| 558 max_specpdl_size = specpdl_size + 40; | |
| 853 | 559 |
| 560 speccount = internal_bind_int (&entering_debugger, 1); | |
| 2532 | 561 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0, 0); |
| 428 | 562 |
| 771 | 563 return unbind_to_1 (speccount, ((threw) |
| 428 | 564 ? Qunbound /* Not returning a value */ |
| 565 : val)); | |
| 566 } | |
| 567 | |
| 568 /* Called when debug-on-exit behavior is called for. Enter the debugger | |
| 569 with the appropriate args for this. VAL is the exit value that is | |
| 570 about to be returned. */ | |
| 571 | |
| 572 static Lisp_Object | |
| 573 do_debug_on_exit (Lisp_Object val) | |
| 574 { | |
| 575 /* This is falsified by call_debugger */ | |
| 576 Lisp_Object v = call_debugger (list2 (Qexit, val)); | |
| 577 | |
| 578 return !UNBOUNDP (v) ? v : val; | |
| 579 } | |
| 580 | |
| 581 /* Called when debug-on-call behavior is called for. Enter the debugger | |
| 582 with the appropriate args for this. VAL is either t for a call | |
| 3025 | 583 through `eval' or `lambda' for a call through `funcall'. |
| 428 | 584 |
| 585 #### The differentiation here between EVAL and FUNCALL is bogus. | |
| 586 FUNCALL can be defined as | |
| 587 | |
| 588 (defmacro func (fun &rest args) | |
| 589 (cons (eval fun) args)) | |
| 590 | |
| 591 and should be treated as such. | |
| 592 */ | |
| 593 | |
| 594 static void | |
| 595 do_debug_on_call (Lisp_Object code) | |
| 596 { | |
| 597 debug_on_next_call = 0; | |
| 598 backtrace_list->debug_on_exit = 1; | |
| 599 call_debugger (list1 (code)); | |
| 600 } | |
| 601 | |
| 602 /* LIST is the value of one of the variables `debug-on-error', | |
| 603 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal', | |
| 604 and CONDITIONS is the list of error conditions associated with | |
| 605 the error being signalled. This returns non-nil if LIST | |
| 606 matches CONDITIONS. (A nil value for LIST does not match | |
| 607 CONDITIONS. A non-list value for LIST does match CONDITIONS. | |
| 608 A list matches CONDITIONS when one of the symbols in LIST is the | |
| 609 same as one of the symbols in CONDITIONS.) */ | |
| 610 | |
| 611 static int | |
| 612 wants_debugger (Lisp_Object list, Lisp_Object conditions) | |
| 613 { | |
| 614 if (NILP (list)) | |
| 615 return 0; | |
| 616 if (! CONSP (list)) | |
| 617 return 1; | |
| 618 | |
| 619 while (CONSP (conditions)) | |
| 620 { | |
| 2552 | 621 Lisp_Object curr, tail; |
| 622 curr = XCAR (conditions); | |
| 428 | 623 for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 2552 | 624 if (EQ (XCAR (tail), curr)) |
| 428 | 625 return 1; |
| 626 conditions = XCDR (conditions); | |
| 627 } | |
| 628 return 0; | |
| 629 } | |
| 630 | |
| 631 | |
| 632 /* Return 1 if an error with condition-symbols CONDITIONS, | |
| 633 and described by SIGNAL-DATA, should skip the debugger | |
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634 according to debug-ignored-errors. */ |
| 428 | 635 |
| 636 static int | |
| 637 skip_debugger (Lisp_Object conditions, Lisp_Object data) | |
| 638 { | |
| 639 /* This function can GC */ | |
| 640 Lisp_Object tail; | |
| 641 int first_string = 1; | |
| 642 Lisp_Object error_message = Qnil; | |
| 643 | |
| 644 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
| 645 { | |
| 646 if (STRINGP (XCAR (tail))) | |
| 647 { | |
| 648 if (first_string) | |
| 649 { | |
| 650 error_message = Ferror_message_string (data); | |
| 651 first_string = 0; | |
| 652 } | |
| 653 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0) | |
| 654 return 1; | |
| 655 } | |
| 656 else | |
| 657 { | |
| 658 Lisp_Object contail; | |
| 659 | |
| 660 for (contail = conditions; CONSP (contail); contail = XCDR (contail)) | |
| 661 if (EQ (XCAR (tail), XCAR (contail))) | |
| 662 return 1; | |
| 663 } | |
| 664 } | |
| 665 | |
| 666 return 0; | |
| 667 } | |
| 668 | |
| 669 /* Actually generate a backtrace on STREAM. */ | |
| 670 | |
| 671 static Lisp_Object | |
| 672 backtrace_259 (Lisp_Object stream) | |
| 673 { | |
| 674 return Fbacktrace (stream, Qt); | |
| 675 } | |
| 676 | |
| 1130 | 677 #ifdef DEBUG_XEMACS |
| 678 | |
| 679 static void | |
| 680 trace_out_and_die (Lisp_Object err) | |
| 681 { | |
| 682 Fdisplay_error (err, Qt); | |
| 683 backtrace_259 (Qnil); | |
| 684 stderr_out ("XEmacs exiting to debugger.\n"); | |
| 685 Fforce_debugging_signal (Qt); | |
| 686 /* Unlikely to be reached */ | |
| 687 } | |
| 688 | |
| 689 #endif | |
| 690 | |
| 428 | 691 /* An error was signaled. Maybe call the debugger, if the `debug-on-error' |
| 692 etc. variables call for this. CONDITIONS is the list of conditions | |
| 693 associated with the error being signalled. SIG is the actual error | |
| 694 being signalled, and DATA is the associated data (these are exactly | |
| 695 the same as the arguments to `signal'). ACTIVE_HANDLERS is the | |
| 696 list of error handlers that are to be put in place while the debugger | |
| 697 is called. This is generally the remaining handlers that are | |
| 698 outside of the innermost handler trapping this error. This way, | |
| 699 if the same error occurs inside of the debugger, you usually don't get | |
| 700 the debugger entered recursively. | |
| 701 | |
| 702 This function returns Qunbound if it didn't call the debugger or if | |
| 703 the user asked (through 'c') that XEmacs should pretend like the | |
| 704 debugger was never entered. Otherwise, it returns the value | |
| 705 that the user specified with `r'. (Note that much of the time, | |
| 706 the user will abort with C-], and we will never have a chance to | |
| 707 return anything at all.) | |
| 708 | |
| 709 SIGNAL_VARS_ONLY means we should only look at debug-on-signal | |
| 710 and stack-trace-on-signal to control whether we do anything. | |
| 711 This is so that debug-on-error doesn't make handled errors | |
| 712 cause the debugger to get invoked. | |
| 713 | |
| 714 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that | |
| 715 those functions aren't done more than once in a single `signal' | |
| 716 session. */ | |
| 717 | |
| 718 static Lisp_Object | |
| 719 signal_call_debugger (Lisp_Object conditions, | |
| 720 Lisp_Object sig, Lisp_Object data, | |
| 721 Lisp_Object active_handlers, | |
| 722 int signal_vars_only, | |
| 723 int *stack_trace_displayed, | |
| 724 int *debugger_entered) | |
| 725 { | |
| 853 | 726 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 727 /* This function can GC */ |
| 853 | 728 #else /* reality check */ |
| 729 /* This function cannot GC because it inhibits GC during its operation */ | |
| 730 #endif | |
| 731 | |
| 428 | 732 Lisp_Object val = Qunbound; |
| 733 Lisp_Object all_handlers = Vcondition_handlers; | |
| 734 Lisp_Object temp_data = Qnil; | |
| 853 | 735 int outer_speccount = specpdl_depth(); |
| 736 int speccount; | |
| 737 | |
| 738 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE | |
| 428 | 739 struct gcpro gcpro1, gcpro2; |
| 740 GCPRO2 (all_handlers, temp_data); | |
| 853 | 741 #else |
| 742 begin_gc_forbidden (); | |
| 743 #endif | |
| 744 | |
| 745 speccount = specpdl_depth(); | |
| 428 | 746 |
| 747 Vcondition_handlers = active_handlers; | |
| 748 | |
| 749 temp_data = Fcons (sig, data); /* needed for skip_debugger */ | |
| 750 | |
| 751 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only | |
| 752 && wants_debugger (Vstack_trace_on_error, conditions) | |
| 753 && !skip_debugger (conditions, temp_data)) | |
| 754 { | |
| 755 specbind (Qdebug_on_error, Qnil); | |
| 756 specbind (Qstack_trace_on_error, Qnil); | |
| 757 specbind (Qdebug_on_signal, Qnil); | |
| 758 specbind (Qstack_trace_on_signal, Qnil); | |
| 759 | |
| 442 | 760 if (!noninteractive) |
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761 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 762 backtrace_259, |
| 763 Qnil, | |
| 764 Qnil); | |
| 765 else /* in batch mode, we want this going to stderr. */ | |
| 766 backtrace_259 (Qnil); | |
| 771 | 767 unbind_to (speccount); |
| 428 | 768 *stack_trace_displayed = 1; |
| 769 } | |
| 770 | |
| 771 if (!entering_debugger && !*debugger_entered && !signal_vars_only | |
| 772 && (EQ (sig, Qquit) | |
| 773 ? debug_on_quit | |
| 774 : wants_debugger (Vdebug_on_error, conditions)) | |
| 775 && !skip_debugger (conditions, temp_data)) | |
| 776 { | |
| 777 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 778 |
| 428 | 779 specbind (Qdebug_on_error, Qnil); |
| 780 specbind (Qstack_trace_on_error, Qnil); | |
| 781 specbind (Qdebug_on_signal, Qnil); | |
| 782 specbind (Qstack_trace_on_signal, Qnil); | |
| 783 | |
| 1130 | 784 #ifdef DEBUG_XEMACS |
| 785 if (noninteractive) | |
| 786 trace_out_and_die (Fcons (sig, data)); | |
| 787 #endif | |
| 788 | |
| 428 | 789 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 853 | 790 unbind_to (speccount); |
| 428 | 791 *debugger_entered = 1; |
| 792 } | |
| 793 | |
| 794 if (!entering_debugger && !*stack_trace_displayed | |
| 795 && wants_debugger (Vstack_trace_on_signal, conditions)) | |
| 796 { | |
| 797 specbind (Qdebug_on_error, Qnil); | |
| 798 specbind (Qstack_trace_on_error, Qnil); | |
| 799 specbind (Qdebug_on_signal, Qnil); | |
| 800 specbind (Qstack_trace_on_signal, Qnil); | |
| 801 | |
| 442 | 802 if (!noninteractive) |
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803 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 804 backtrace_259, |
| 805 Qnil, | |
| 806 Qnil); | |
| 807 else /* in batch mode, we want this going to stderr. */ | |
| 808 backtrace_259 (Qnil); | |
| 771 | 809 unbind_to (speccount); |
| 428 | 810 *stack_trace_displayed = 1; |
| 811 } | |
| 812 | |
| 813 if (!entering_debugger && !*debugger_entered | |
| 814 && (EQ (sig, Qquit) | |
| 815 ? debug_on_quit | |
| 816 : wants_debugger (Vdebug_on_signal, conditions))) | |
| 817 { | |
| 818 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 819 |
| 428 | 820 specbind (Qdebug_on_error, Qnil); |
| 821 specbind (Qstack_trace_on_error, Qnil); | |
| 822 specbind (Qdebug_on_signal, Qnil); | |
| 823 specbind (Qstack_trace_on_signal, Qnil); | |
| 824 | |
| 1130 | 825 #ifdef DEBUG_XEMACS |
| 826 if (noninteractive) | |
| 827 trace_out_and_die (Fcons (sig, data)); | |
| 828 #endif | |
| 829 | |
| 428 | 830 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 831 *debugger_entered = 1; | |
| 832 } | |
| 833 | |
| 853 | 834 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 835 UNGCPRO; |
| 853 | 836 #endif |
| 428 | 837 Vcondition_handlers = all_handlers; |
| 853 | 838 return unbind_to_1 (outer_speccount, val); |
| 428 | 839 } |
| 840 | |
| 841 | |
| 842 /************************************************************************/ | |
| 843 /* The basic special forms */ | |
| 844 /************************************************************************/ | |
| 845 | |
|
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846 /* Except for Fprogn(), the basic special operators below are only called |
| 428 | 847 from interpreted code. The byte compiler turns them into bytecodes. */ |
| 848 | |
| 849 DEFUN ("or", For, 0, UNEVALLED, 0, /* | |
|
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850 Eval ARGS until one of them yields non-nil, then return that value. |
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851 The remaining ARGS are not evalled at all. |
| 428 | 852 If all args return nil, return nil. |
|
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853 |
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854 Any multiple values from the last form, and only from the last form, are |
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855 passed back. See `values' and `multiple-value-bind'. |
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856 |
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857 arguments: (&rest ARGS) |
| 428 | 858 */ |
| 859 (args)) | |
| 860 { | |
| 861 /* This function can GC */ | |
|
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862 Lisp_Object val = Qnil; |
| 428 | 863 |
|
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864 LIST_LOOP_3 (arg, args, tail) |
| 428 | 865 { |
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866 if (!NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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867 { |
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868 if (NILP (XCDR (tail))) |
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869 { |
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870 /* Pass back multiple values if this is the last one: */ |
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871 return val; |
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872 } |
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873 |
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874 return IGNORE_MULTIPLE_VALUES (val); |
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875 } |
| 428 | 876 } |
| 877 | |
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878 return val; |
| 428 | 879 } |
| 880 | |
| 881 DEFUN ("and", Fand, 0, UNEVALLED, 0, /* | |
|
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882 Eval ARGS until one of them yields nil, then return nil. |
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883 The remaining ARGS are not evalled at all. |
| 428 | 884 If no arg yields nil, return the last arg's value. |
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885 |
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886 Any multiple values from the last form, and only from the last form, are |
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887 passed back. See `values' and `multiple-value-bind'. |
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888 |
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889 arguments: (&rest ARGS) |
| 428 | 890 */ |
| 891 (args)) | |
| 892 { | |
| 893 /* This function can GC */ | |
|
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|
894 Lisp_Object val = Qt; |
| 428 | 895 |
|
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896 LIST_LOOP_3 (arg, args, tail) |
| 428 | 897 { |
|
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898 if (NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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899 { |
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900 if (NILP (XCDR (tail))) |
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901 { |
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902 /* Pass back any multiple values for the last form: */ |
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903 return val; |
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904 } |
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905 |
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906 return Qnil; |
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|
907 } |
| 428 | 908 } |
| 909 | |
| 910 return val; | |
| 911 } | |
| 912 | |
| 913 DEFUN ("if", Fif, 2, UNEVALLED, 0, /* | |
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914 If COND yields non-nil, do THEN, else do ELSE. |
| 428 | 915 Returns the value of THEN or the value of the last of the ELSE's. |
| 916 THEN must be one expression, but ELSE... can be zero or more expressions. | |
| 917 If COND yields nil, and there are no ELSE's, the value is nil. | |
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918 |
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919 arguments: (COND THEN &rest ELSE) |
| 428 | 920 */ |
| 921 (args)) | |
| 922 { | |
| 923 /* This function can GC */ | |
| 924 Lisp_Object condition = XCAR (args); | |
| 925 Lisp_Object then_form = XCAR (XCDR (args)); | |
| 926 Lisp_Object else_forms = XCDR (XCDR (args)); | |
| 927 | |
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928 if (!NILP (IGNORE_MULTIPLE_VALUES (Feval (condition)))) |
| 428 | 929 return Feval (then_form); |
| 930 else | |
| 931 return Fprogn (else_forms); | |
| 932 } | |
| 933 | |
| 934 /* Macros `when' and `unless' are trivially defined in Lisp, | |
| 935 but it helps for bootstrapping to have them ALWAYS defined. */ | |
| 936 | |
| 937 DEFUN ("when", Fwhen, 1, MANY, 0, /* | |
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938 If COND yields non-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; | |
| 853 | 947 |
| 428 | 948 switch (nargs) |
| 949 { | |
| 950 case 1: body = Qnil; break; | |
| 951 case 2: body = args[1]; break; | |
| 952 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break; | |
| 953 } | |
| 954 | |
| 955 return list3 (Qif, cond, body); | |
| 956 } | |
| 957 | |
| 958 DEFUN ("unless", Funless, 1, MANY, 0, /* | |
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959 If COND yields nil, do BODY, else return nil. |
| 428 | 960 BODY can be zero or more expressions. If BODY is nil, return nil. |
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961 |
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962 arguments: (COND &rest BODY) |
| 428 | 963 */ |
| 964 (int nargs, Lisp_Object *args)) | |
| 965 { | |
| 966 Lisp_Object cond = args[0]; | |
| 967 Lisp_Object body = Flist (nargs-1, args+1); | |
| 968 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body))); | |
| 969 } | |
| 970 | |
| 971 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /* | |
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972 Try each clause until one succeeds. |
| 428 | 973 Each clause looks like (CONDITION BODY...). CONDITION is evaluated |
| 974 and, if the value is non-nil, this clause succeeds: | |
| 975 then the expressions in BODY are evaluated and the last one's | |
| 976 value is the value of the cond-form. | |
| 977 If no clause succeeds, cond returns nil. | |
| 978 If a clause has one element, as in (CONDITION), | |
| 979 CONDITION's value if non-nil is returned from the cond-form. | |
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|
980 |
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|
981 arguments: (&rest CLAUSES) |
| 428 | 982 */ |
| 983 (args)) | |
| 984 { | |
| 985 /* This function can GC */ | |
| 442 | 986 REGISTER Lisp_Object val; |
| 428 | 987 |
| 988 LIST_LOOP_2 (clause, args) | |
| 989 { | |
| 990 CHECK_CONS (clause); | |
|
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991 if (!NILP (val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (clause))))) |
| 428 | 992 { |
| 993 if (!NILP (clause = XCDR (clause))) | |
| 994 { | |
| 995 CHECK_TRUE_LIST (clause); | |
|
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996 /* Pass back any multiple values here: */ |
| 428 | 997 val = Fprogn (clause); |
| 998 } | |
| 999 return val; | |
| 1000 } | |
| 1001 } | |
| 1002 | |
| 1003 return Qnil; | |
| 1004 } | |
| 1005 | |
| 1006 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /* | |
|
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1007 Eval BODY forms sequentially and return value of last one. |
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|
1008 |
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|
1009 arguments: (&rest BODY) |
| 428 | 1010 */ |
| 1011 (args)) | |
| 1012 { | |
| 1013 /* This function can GC */ | |
| 1014 /* Caller must provide a true list in ARGS */ | |
| 442 | 1015 REGISTER Lisp_Object val = Qnil; |
| 428 | 1016 struct gcpro gcpro1; |
| 1017 | |
| 1018 GCPRO1 (args); | |
| 1019 | |
| 1020 { | |
| 1021 LIST_LOOP_2 (form, args) | |
| 1022 val = Feval (form); | |
| 1023 } | |
| 1024 | |
| 1025 UNGCPRO; | |
| 1026 return val; | |
| 1027 } | |
| 1028 | |
| 1029 /* Fprog1() is the canonical example of a function that must GCPRO a | |
| 1030 Lisp_Object across calls to Feval(). */ | |
| 1031 | |
| 1032 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /* | |
| 1033 Similar to `progn', but the value of the first form is returned. | |
|
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|
1034 |
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|
1035 All the arguments are evaluated sequentially. The value of FIRST is saved |
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|
1036 during evaluation of the remaining args, whose values are discarded. |
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|
1037 |
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|
1038 arguments: (FIRST &rest BODY) |
| 428 | 1039 */ |
| 1040 (args)) | |
| 1041 { | |
| 1849 | 1042 Lisp_Object val; |
| 428 | 1043 struct gcpro gcpro1; |
| 1044 | |
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|
1045 val = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
| 428 | 1046 |
| 1047 GCPRO1 (val); | |
| 1048 | |
| 1049 { | |
| 1050 LIST_LOOP_2 (form, XCDR (args)) | |
| 1051 Feval (form); | |
| 1052 } | |
| 1053 | |
| 1054 UNGCPRO; | |
| 1055 return val; | |
| 1056 } | |
| 1057 | |
| 1058 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /* | |
| 1059 Similar to `progn', but the value of the second form is returned. | |
|
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|
1060 |
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|
1061 All the arguments are evaluated sequentially. The value of SECOND is saved |
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1062 during evaluation of the remaining args, whose values are discarded. |
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|
1063 |
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|
1064 arguments: (FIRST SECOND &rest BODY) |
| 428 | 1065 */ |
| 1066 (args)) | |
| 1067 { | |
| 1068 /* This function can GC */ | |
| 1849 | 1069 Lisp_Object val; |
| 428 | 1070 struct gcpro gcpro1; |
| 1071 | |
| 1072 Feval (XCAR (args)); | |
| 1073 args = XCDR (args); | |
|
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|
1074 |
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|
1075 val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
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|
1076 |
| 428 | 1077 args = XCDR (args); |
| 1078 | |
| 1079 GCPRO1 (val); | |
| 1080 | |
| 442 | 1081 { |
| 1082 LIST_LOOP_2 (form, args) | |
| 1083 Feval (form); | |
| 1084 } | |
| 428 | 1085 |
| 1086 UNGCPRO; | |
| 1087 return val; | |
| 1088 } | |
| 1089 | |
| 1090 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /* | |
|
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|
1091 Bind variables according to VARLIST then eval BODY. |
| 428 | 1092 The value of the last form in BODY is returned. |
| 1093 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1094 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1095 Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1096 |
|
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diff
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|
1097 arguments: (VARLIST &rest BODY) |
| 428 | 1098 */ |
| 1099 (args)) | |
| 1100 { | |
| 1101 /* This function can GC */ | |
| 1102 Lisp_Object varlist = XCAR (args); | |
| 1103 Lisp_Object body = XCDR (args); | |
| 1104 int speccount = specpdl_depth(); | |
| 1105 | |
| 1106 EXTERNAL_LIST_LOOP_3 (var, varlist, tail) | |
| 1107 { | |
| 1108 Lisp_Object symbol, value, tem; | |
| 1109 if (SYMBOLP (var)) | |
| 1110 symbol = var, value = Qnil; | |
| 1111 else | |
| 1112 { | |
| 1113 CHECK_CONS (var); | |
| 1114 symbol = XCAR (var); | |
| 1115 tem = XCDR (var); | |
| 1116 if (NILP (tem)) | |
| 1117 value = Qnil; | |
| 1118 else | |
| 1119 { | |
| 1120 CHECK_CONS (tem); | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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4657
diff
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|
1121 value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 428 | 1122 if (!NILP (XCDR (tem))) |
| 563 | 1123 sferror |
| 428 | 1124 ("`let' bindings can have only one value-form", var); |
| 1125 } | |
| 1126 } | |
| 1127 specbind (symbol, value); | |
| 1128 } | |
| 771 | 1129 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1130 } |
| 1131 | |
| 1132 DEFUN ("let", Flet, 1, UNEVALLED, 0, /* | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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4624
diff
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|
1133 Bind variables according to VARLIST then eval BODY. |
| 428 | 1134 The value of the last form in BODY is returned. |
| 1135 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1136 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1137 All the VALUEFORMs are evalled before any symbols are bound. | |
|
4642
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diff
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|
1138 |
|
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diff
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|
1139 arguments: (VARLIST &rest BODY) |
| 428 | 1140 */ |
| 1141 (args)) | |
| 1142 { | |
| 1143 /* This function can GC */ | |
| 1144 Lisp_Object varlist = XCAR (args); | |
| 1145 Lisp_Object body = XCDR (args); | |
| 1146 int speccount = specpdl_depth(); | |
| 1147 Lisp_Object *temps; | |
| 1148 int idx; | |
| 1149 struct gcpro gcpro1; | |
| 1150 | |
| 1151 /* Make space to hold the values to give the bound variables. */ | |
| 1152 { | |
| 1153 int varcount; | |
| 1154 GET_EXTERNAL_LIST_LENGTH (varlist, varcount); | |
| 1155 temps = alloca_array (Lisp_Object, varcount); | |
| 1156 } | |
| 1157 | |
| 1158 /* Compute the values and store them in `temps' */ | |
| 1159 GCPRO1 (*temps); | |
| 1160 gcpro1.nvars = 0; | |
| 1161 | |
| 1162 idx = 0; | |
| 442 | 1163 { |
| 1164 LIST_LOOP_2 (var, varlist) | |
| 1165 { | |
| 1166 Lisp_Object *value = &temps[idx++]; | |
| 1167 if (SYMBOLP (var)) | |
| 1168 *value = Qnil; | |
| 1169 else | |
| 1170 { | |
| 1171 Lisp_Object tem; | |
| 1172 CHECK_CONS (var); | |
| 1173 tem = XCDR (var); | |
| 1174 if (NILP (tem)) | |
| 1175 *value = Qnil; | |
| 1176 else | |
| 1177 { | |
| 1178 CHECK_CONS (tem); | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
1179 *value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 442 | 1180 gcpro1.nvars = idx; |
| 1181 | |
| 1182 if (!NILP (XCDR (tem))) | |
| 563 | 1183 sferror |
| 442 | 1184 ("`let' bindings can have only one value-form", var); |
| 1185 } | |
| 1186 } | |
| 1187 } | |
| 1188 } | |
| 428 | 1189 |
| 1190 idx = 0; | |
| 442 | 1191 { |
| 1192 LIST_LOOP_2 (var, varlist) | |
| 1193 { | |
| 1194 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]); | |
| 1195 } | |
| 1196 } | |
| 428 | 1197 |
| 1198 UNGCPRO; | |
| 1199 | |
| 771 | 1200 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1201 } |
| 1202 | |
| 1203 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /* | |
|
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4624
diff
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|
1204 If TEST yields non-nil, eval BODY... and repeat. |
| 428 | 1205 The order of execution is thus TEST, BODY, TEST, BODY and so on |
| 1206 until TEST returns nil. | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1207 |
|
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Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
1208 arguments: (TEST &rest BODY) |
| 428 | 1209 */ |
| 1210 (args)) | |
| 1211 { | |
| 1212 /* This function can GC */ | |
| 1213 Lisp_Object test = XCAR (args); | |
| 1214 Lisp_Object body = XCDR (args); | |
| 1215 | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
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|
1216 while (!NILP (IGNORE_MULTIPLE_VALUES (Feval (test)))) |
| 428 | 1217 { |
| 1218 QUIT; | |
| 1219 Fprogn (body); | |
| 1220 } | |
| 1221 | |
| 1222 return Qnil; | |
| 1223 } | |
| 1224 | |
| 1225 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /* | |
| 1226 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL. | |
| 1227 The symbols SYM are variables; they are literal (not evaluated). | |
| 1228 The values VAL are expressions; they are evaluated. | |
| 1229 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
| 1230 The second VAL is not computed until after the first SYM is set, and so on; | |
| 1231 each VAL can use the new value of variables set earlier in the `setq'. | |
| 1232 The return value of the `setq' form is the value of the last VAL. | |
| 1233 */ | |
| 1234 (args)) | |
| 1235 { | |
| 1236 /* This function can GC */ | |
| 1237 int nargs; | |
| 2421 | 1238 Lisp_Object retval = Qnil; |
| 428 | 1239 |
| 1240 GET_LIST_LENGTH (args, nargs); | |
| 1241 | |
| 1242 if (nargs & 1) /* Odd number of arguments? */ | |
| 1243 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs))); | |
| 1244 | |
| 2421 | 1245 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args) |
| 428 | 1246 { |
| 1247 val = Feval (val); | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
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4657
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|
1248 val = IGNORE_MULTIPLE_VALUES (val); |
| 428 | 1249 Fset (symbol, val); |
| 2421 | 1250 retval = val; |
| 428 | 1251 } |
| 1252 | |
| 2421 | 1253 END_GC_PROPERTY_LIST_LOOP (symbol); |
| 1254 | |
| 1255 return retval; | |
| 428 | 1256 } |
| 1257 | |
| 1258 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /* | |
| 1259 Return the argument, without evaluating it. `(quote x)' yields `x'. | |
| 3794 | 1260 |
| 3842 | 1261 `quote' differs from `function' in that it is a hint that an expression is |
| 1262 data, not a function. In particular, under some circumstances the byte | |
| 1263 compiler will compile an expression quoted with `function', but it will | |
| 1264 never do so for an expression quoted with `quote'. These issues are most | |
| 1265 important for lambda expressions (see `lambda'). | |
| 1266 | |
| 1267 There is an alternative, more readable, reader syntax for `quote': a Lisp | |
| 1268 object preceded by `''. Thus, `'x' is equivalent to `(quote x)', in all | |
| 1269 contexts. A print function may use either. Internally the expression is | |
| 1270 represented as `(quote x)'). | |
|
5265
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1271 |
|
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
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|
1272 arguments: (OBJECT) |
| 428 | 1273 */ |
| 1274 (args)) | |
| 1275 { | |
|
5207
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
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|
1276 int nargs; |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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5146
diff
changeset
|
1277 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
1278 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1279 if (nargs != 1) |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1280 { |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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5146
diff
changeset
|
1281 Fsignal (Qwrong_number_of_arguments, |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1282 list2 (Qquote, make_int (nargs))); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1283 } |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5146
diff
changeset
|
1284 |
| 428 | 1285 return XCAR (args); |
| 1286 } | |
| 1287 | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1288 /* Originally, this was just a function -- but `custom' used a garden- |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1289 variety version, so why not make it a subr? */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1290 DEFUN ("quote-maybe", Fquote_maybe, 1, 1, 0, /* |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1291 Quote EXPR if it is not self quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1292 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1293 In contrast with `quote', this is a function, not a special form; its |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1294 argument is evaluated before `quote-maybe' is called. It returns either |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1295 EXPR (if it is self-quoting) or a list `(quote EXPR)' if it is not |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1296 self-quoting. Lists starting with the symbol `lambda' are regarded as |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1297 self-quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1298 */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1299 (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1300 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1301 if ((XTYPE (expr)) == Lisp_Type_Record) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1302 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1303 switch (XRECORD_LHEADER (expr)->type) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1304 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1305 case lrecord_type_symbol: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1306 if (NILP (expr) || (EQ (expr, Qt)) || SYMBOL_IS_KEYWORD (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1307 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1308 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1309 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1310 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1311 case lrecord_type_cons: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1312 if (EQ (XCAR (expr), Qlambda)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1313 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1314 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1315 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1316 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1317 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1318 case lrecord_type_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1319 case lrecord_type_string: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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parents:
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diff
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|
1320 case lrecord_type_compiled_function: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1321 case lrecord_type_bit_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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parents:
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diff
changeset
|
1322 case lrecord_type_float: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1323 case lrecord_type_hash_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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changeset
|
1324 case lrecord_type_char_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1325 case lrecord_type_range_table: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1326 case lrecord_type_bignum: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1327 case lrecord_type_ratio: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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changeset
|
1328 case lrecord_type_bigfloat: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1329 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1330 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1331 return list2 (Qquote, expr); |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1332 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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parents:
4693
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|
1333 |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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changeset
|
1334 /* Fixnums and characters are self-quoting: */ |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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diff
changeset
|
1335 return expr; |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1336 } |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1337 |
| 428 | 1338 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /* |
| 3842 | 1339 Return the argument, without evaluating it. `(function x)' yields `x'. |
| 1340 | |
| 1341 `function' differs from `quote' in that it is a hint that an expression is | |
| 1342 a function, not data. In particular, under some circumstances the byte | |
| 1343 compiler will compile an expression quoted with `function', but it will | |
| 1344 never do so for an expression quoted with `quote'. However, the byte | |
| 1345 compiler will not compile an expression buried in a data structure such as | |
| 1346 a vector or a list which is not syntactically a function. These issues are | |
| 1347 most important for lambda expressions (see `lambda'). | |
| 1348 | |
| 1349 There is an alternative, more readable, reader syntax for `function': a Lisp | |
| 1350 object preceded by `#''. Thus, #'x is equivalent to (function x), in all | |
| 1351 contexts. A print function may use either. Internally the expression is | |
| 1352 represented as `(function x)'). | |
|
5265
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
5222
diff
changeset
|
1353 |
|
5663ae9a8989
Warn at compile time, error at runtime, with (quote X Y), (function X Y).
Aidan Kehoe <kehoea@parhasard.net>
parents:
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changeset
|
1354 arguments: (SYMBOL-OR-LAMBDA) |
| 428 | 1355 */ |
| 1356 (args)) | |
| 1357 { | |
|
5207
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
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diff
changeset
|
1358 int nargs; |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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changeset
|
1359 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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|
1360 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
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|
1361 if (nargs != 1) |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1362 { |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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changeset
|
1363 Fsignal (Qwrong_number_of_arguments, |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
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changeset
|
1364 list2 (Qfunction, make_int (nargs))); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
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changeset
|
1365 } |
|
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Error on too many arguments to #'function, #'quote.
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|
1366 |
| 428 | 1367 return XCAR (args); |
| 1368 } | |
| 1369 | |
| 1370 | |
| 1371 /************************************************************************/ | |
| 1372 /* Defining functions/variables */ | |
| 1373 /************************************************************************/ | |
| 1374 static Lisp_Object | |
| 1375 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1376 { | |
| 1377 Ffset (name, defn); | |
|
4535
69a1eda3da06
Distinguish vars and functions in #'symbol-file, #'describe-{function,variable}
Aidan Kehoe <kehoea@parhasard.net>
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4502
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|
1378 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1379 return name; |
| 1380 } | |
| 1381 | |
| 1382 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
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parents:
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|
1383 Define NAME as a function. |
| 428 | 1384 The definition is (lambda ARGLIST [DOCSTRING] BODY...). |
| 1385 See also the function `interactive'. | |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
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|
1386 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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changeset
|
1387 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1388 */ |
| 1389 (args)) | |
| 1390 { | |
| 1391 /* This function can GC */ | |
| 1392 return define_function (XCAR (args), | |
| 1393 Fcons (Qlambda, XCDR (args))); | |
| 1394 } | |
| 1395 | |
| 1396 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
|
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parents:
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|
1397 Define NAME as a macro. |
| 428 | 1398 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). |
| 1399 When the macro is called, as in (NAME ARGS...), | |
| 1400 the function (lambda ARGLIST BODY...) is applied to | |
| 1401 the list ARGS... as it appears in the expression, | |
| 1402 and the result should be a form to be evaluated instead of the original. | |
|
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|
1403 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
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changeset
|
1404 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1405 */ |
| 1406 (args)) | |
| 1407 { | |
| 1408 /* This function can GC */ | |
| 1409 return define_function (XCAR (args), | |
| 1410 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1411 } | |
| 1412 | |
| 1413 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
|
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Support #'function-arglist with built-in special forms.
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|
1414 Define SYMBOL as a variable. |
| 428 | 1415 You are not required to define a variable in order to use it, |
| 1416 but the definition can supply documentation and an initial value | |
| 1417 in a way that tags can recognize. | |
| 1418 | |
| 1419 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1420 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1421 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1422 void.) | |
| 1423 If SYMBOL is buffer-local, its default value is what is set; | |
| 1424 buffer-local values are not affected. | |
| 1425 INITVALUE and DOCSTRING are optional. | |
| 1426 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1427 This means that M-x set-variable recognizes it. |
| 428 | 1428 If INITVALUE is missing, SYMBOL's value is not set. |
| 1429 | |
| 1430 In lisp-interaction-mode defvar is treated as defconst. | |
|
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Support #'function-arglist with built-in special forms.
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parents:
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|
1431 |
|
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Support #'function-arglist with built-in special forms.
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parents:
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changeset
|
1432 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1433 */ |
| 1434 (args)) | |
| 1435 { | |
| 1436 /* This function can GC */ | |
| 1437 Lisp_Object sym = XCAR (args); | |
| 1438 | |
| 1439 if (!NILP (args = XCDR (args))) | |
| 1440 { | |
| 1441 Lisp_Object val = XCAR (args); | |
| 1442 | |
| 1443 if (NILP (Fdefault_boundp (sym))) | |
| 1444 { | |
| 1445 struct gcpro gcpro1; | |
| 1446 GCPRO1 (val); | |
|
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Support full Common Lisp multiple values in C.
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4657
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|
1447 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1448 Fset_default (sym, val); |
| 1449 UNGCPRO; | |
| 1450 } | |
| 1451 | |
| 1452 if (!NILP (args = XCDR (args))) | |
| 1453 { | |
| 1454 Lisp_Object doc = XCAR (args); | |
| 1455 Fput (sym, Qvariable_documentation, doc); | |
| 1456 if (!NILP (args = XCDR (args))) | |
| 563 | 1457 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1458 } |
| 1459 } | |
| 1460 | |
| 1461 #ifdef I18N3 | |
| 1462 if (!NILP (Vfile_domain)) | |
| 1463 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1464 #endif | |
| 1465 | |
| 1466 LOADHIST_ATTACH (sym); | |
| 1467 return sym; | |
| 1468 } | |
| 1469 | |
| 1470 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
|
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Support #'function-arglist with built-in special forms.
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parents:
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changeset
|
1471 Define SYMBOL as a constant variable. |
| 428 | 1472 The intent is that programs do not change this value, but users may. |
| 1473 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1474 If SYMBOL is buffer-local, its default value is what is set; | |
| 1475 buffer-local values are not affected. | |
| 1476 DOCSTRING is optional. | |
| 1477 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1478 This means that M-x set-variable recognizes it. |
| 428 | 1479 |
| 1480 Note: do not use `defconst' for user options in libraries that are not | |
| 1481 normally loaded, since it is useful for users to be able to specify | |
| 1482 their own values for such variables before loading the library. | |
| 1483 Since `defconst' unconditionally assigns the variable, | |
| 1484 it would override the user's choice. | |
|
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Support #'function-arglist with built-in special forms.
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parents:
4624
diff
changeset
|
1485 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
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parents:
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diff
changeset
|
1486 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1487 */ |
| 1488 (args)) | |
| 1489 { | |
| 1490 /* This function can GC */ | |
| 1491 Lisp_Object sym = XCAR (args); | |
| 1492 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1493 struct gcpro gcpro1; | |
| 1494 | |
| 1495 GCPRO1 (val); | |
| 1496 | |
|
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Support full Common Lisp multiple values in C.
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parents:
4657
diff
changeset
|
1497 val = IGNORE_MULTIPLE_VALUES (val); |
|
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diff
changeset
|
1498 |
| 428 | 1499 Fset_default (sym, val); |
| 1500 | |
| 1501 UNGCPRO; | |
| 1502 | |
| 1503 if (!NILP (args = XCDR (args))) | |
| 1504 { | |
| 1505 Lisp_Object doc = XCAR (args); | |
| 1506 Fput (sym, Qvariable_documentation, doc); | |
| 1507 if (!NILP (args = XCDR (args))) | |
| 563 | 1508 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1509 } |
| 1510 | |
| 1511 #ifdef I18N3 | |
| 1512 if (!NILP (Vfile_domain)) | |
| 1513 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1514 #endif | |
| 1515 | |
| 1516 LOADHIST_ATTACH (sym); | |
| 1517 return sym; | |
| 1518 } | |
| 1519 | |
|
4502
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4162
diff
changeset
|
1520 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4162
diff
changeset
|
1521 with the symbol variable aliases. */ |
| 428 | 1522 |
| 1523 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1524 Return result of expanding macros at top level of FORM. | |
| 1525 If FORM is not a macro call, it is returned unchanged. | |
| 1526 Otherwise, the macro is expanded and the expansion is considered | |
| 1527 in place of FORM. When a non-macro-call results, it is returned. | |
| 1528 | |
| 442 | 1529 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1530 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1531 */ | |
| 442 | 1532 (form, environment)) |
| 428 | 1533 { |
| 1534 /* This function can GC */ | |
| 1535 /* With cleanups from Hallvard Furuseth. */ | |
| 1536 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1537 | |
| 1538 while (1) | |
| 1539 { | |
| 1540 /* Come back here each time we expand a macro call, | |
| 1541 in case it expands into another macro call. */ | |
| 1542 if (!CONSP (form)) | |
| 1543 break; | |
| 1544 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1545 def = sym = XCAR (form); | |
| 1546 tem = Qnil; | |
| 1547 /* Trace symbols aliases to other symbols | |
| 1548 until we get a symbol that is not an alias. */ | |
| 1549 while (SYMBOLP (def)) | |
| 1550 { | |
| 1551 QUIT; | |
| 1552 sym = def; | |
| 442 | 1553 tem = Fassq (sym, environment); |
| 428 | 1554 if (NILP (tem)) |
| 1555 { | |
| 1556 def = XSYMBOL (sym)->function; | |
| 1557 if (!UNBOUNDP (def)) | |
| 1558 continue; | |
| 1559 } | |
| 1560 break; | |
| 1561 } | |
| 442 | 1562 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1563 and if TEM is nil then DEF is SYM's function definition. */ |
| 1564 if (NILP (tem)) | |
| 1565 { | |
| 442 | 1566 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1567 Look at its function definition. */ |
| 1568 if (UNBOUNDP (def) | |
| 1569 || !CONSP (def)) | |
| 1570 /* Not defined or definition not suitable */ | |
| 1571 break; | |
| 1572 if (EQ (XCAR (def), Qautoload)) | |
| 1573 { | |
| 1574 /* Autoloading function: will it be a macro when loaded? */ | |
| 1575 tem = Felt (def, make_int (4)); | |
| 1576 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1577 { | |
| 1578 /* Yes, load it and try again. */ | |
| 970 | 1579 /* do_autoload GCPROs both arguments */ |
| 428 | 1580 do_autoload (def, sym); |
| 1581 continue; | |
| 1582 } | |
| 1583 else | |
| 1584 break; | |
| 1585 } | |
| 1586 else if (!EQ (XCAR (def), Qmacro)) | |
| 1587 break; | |
| 1588 else expander = XCDR (def); | |
| 1589 } | |
| 1590 else | |
| 1591 { | |
| 1592 expander = XCDR (tem); | |
| 1593 if (NILP (expander)) | |
| 1594 break; | |
| 1595 } | |
| 1596 form = apply1 (expander, XCDR (form)); | |
| 1597 } | |
| 1598 return form; | |
| 1599 } | |
| 1600 | |
| 1601 | |
| 1602 /************************************************************************/ | |
| 1603 /* Non-local exits */ | |
| 1604 /************************************************************************/ | |
| 1605 | |
| 1318 | 1606 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1607 | |
| 1608 int | |
| 1609 proper_redisplay_wrapping_in_place (void) | |
| 1610 { | |
| 1611 return !in_display | |
| 1612 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1613 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1614 } | |
| 1615 | |
| 1616 static void | |
| 1617 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1618 { | |
| 1619 assert_with_message | |
| 1620 (proper_redisplay_wrapping_in_place (), | |
| 1621 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1622 } | |
| 1623 | |
| 1624 static void | |
| 1625 check_proper_critical_section_lisp_protection (void) | |
| 1626 { | |
| 1627 assert_with_message | |
| 1628 (proper_redisplay_wrapping_in_place (), | |
| 1629 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1630 } | |
| 1631 | |
| 1632 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1633 | |
| 428 | 1634 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
|
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diff
changeset
|
1635 Eval BODY allowing nonlocal exits using `throw'. |
| 428 | 1636 TAG is evalled to get the tag to use. Then the BODY is executed. |
| 3577 | 1637 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1638 If no throw happens, `catch' returns the value of the last BODY form. |
| 1639 If a throw happens, it specifies the value to return from `catch'. | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1640 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
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changeset
|
1641 arguments: (TAG &rest BODY) |
| 428 | 1642 */ |
| 1643 (args)) | |
| 1644 { | |
| 1645 /* This function can GC */ | |
| 1646 Lisp_Object tag = Feval (XCAR (args)); | |
| 1647 Lisp_Object body = XCDR (args); | |
| 2532 | 1648 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1649 } |
| 1650 | |
| 1651 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1652 FUNC should return a Lisp_Object. | |
| 1653 This is how catches are done from within C code. */ | |
| 1654 | |
| 1655 Lisp_Object | |
| 1656 internal_catch (Lisp_Object tag, | |
| 1657 Lisp_Object (*func) (Lisp_Object arg), | |
| 1658 Lisp_Object arg, | |
| 853 | 1659 int * volatile threw, |
| 2532 | 1660 Lisp_Object * volatile thrown_tag, |
| 1661 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1662 { |
| 1663 /* This structure is made part of the chain `catchlist'. */ | |
| 1664 struct catchtag c; | |
| 1665 | |
| 1666 /* Fill in the components of c, and put it on the list. */ | |
| 1667 c.next = catchlist; | |
| 1668 c.tag = tag; | |
| 853 | 1669 c.actual_tag = Qnil; |
| 2532 | 1670 c.backtrace = Qnil; |
| 428 | 1671 c.val = Qnil; |
| 1672 c.backlist = backtrace_list; | |
| 1673 #if 0 /* FSFmacs */ | |
| 1674 /* #### */ | |
| 1675 c.handlerlist = handlerlist; | |
| 1676 #endif | |
| 1677 c.lisp_eval_depth = lisp_eval_depth; | |
| 1678 c.pdlcount = specpdl_depth(); | |
| 1679 #if 0 /* FSFmacs */ | |
| 1680 c.poll_suppress_count = async_timer_suppress_count; | |
| 1681 #endif | |
| 1682 c.gcpro = gcprolist; | |
| 1683 catchlist = &c; | |
| 1684 | |
| 1685 /* Call FUNC. */ | |
| 1686 if (SETJMP (c.jmp)) | |
| 1687 { | |
| 1688 /* Throw works by a longjmp that comes right here. */ | |
| 1689 if (threw) *threw = 1; | |
| 853 | 1690 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1691 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1692 return c.val; |
| 1693 } | |
| 1694 c.val = (*func) (arg); | |
| 1695 if (threw) *threw = 0; | |
| 853 | 1696 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1697 catchlist = c.next; |
| 853 | 1698 check_catchlist_sanity (); |
| 428 | 1699 return c.val; |
| 1700 } | |
| 1701 | |
| 1702 | |
| 1703 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1704 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1705 | |
| 2297 | 1706 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1707 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1708 condition-case form has a TAG of Qnil. |
| 1709 | |
| 1710 Before each catch is discarded, unbind all special bindings and | |
| 1711 execute all unwind-protect clauses made above that catch. Unwind | |
| 1712 the handler stack as we go, so that the proper handlers are in | |
| 1713 effect for each unwind-protect clause we run. At the end, restore | |
| 1714 some static info saved in CATCH, and longjmp to the location | |
| 1715 specified in the | |
| 1716 | |
| 1717 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1718 | |
| 2268 | 1719 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1720 Lisp_Object)); | |
| 1721 | |
| 1722 static DOESNT_RETURN | |
| 853 | 1723 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1724 { |
| 1725 REGISTER int last_time; | |
| 1726 | |
| 1727 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1728 Before each catch is discarded, unbind all special bindings | |
| 1729 and execute all unwind-protect clauses made above that catch. | |
| 1730 At the end, restore some static info saved in CATCH, | |
| 1731 and longjmp to the location specified. | |
| 1732 */ | |
| 1733 | |
| 1734 /* Save the value somewhere it will be GC'ed. | |
| 1735 (Can't overwrite tag slot because an unwind-protect may | |
| 1736 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1737 c->val = val; | |
| 853 | 1738 c->actual_tag = tag; |
| 428 | 1739 |
| 1740 #if 0 /* FSFmacs */ | |
| 1741 /* Restore the polling-suppression count. */ | |
| 1742 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1743 #endif | |
| 1744 | |
| 617 | 1745 #if 1 |
| 428 | 1746 do |
| 1747 { | |
| 1748 last_time = catchlist == c; | |
| 1749 | |
| 1750 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1751 handlers. */ | |
| 771 | 1752 unbind_to (catchlist->pdlcount); |
| 428 | 1753 catchlist = catchlist->next; |
| 853 | 1754 check_catchlist_sanity (); |
| 428 | 1755 } |
| 1756 while (! last_time); | |
| 617 | 1757 #else |
| 1758 /* Former XEmacs code. This is definitely not as correct because | |
| 1759 there may be a number of catches we're unwinding, and a number | |
| 1760 of unwind-protects in the process. By not undoing the catches till | |
| 1761 the end, there may be invalid catches still current. (This would | |
| 1762 be a particular problem with code like this: | |
| 1763 | |
| 1764 (catch 'foo | |
| 1765 (call-some-code-which-does... | |
| 1766 (catch 'bar | |
| 1767 (unwind-protect | |
| 1768 (call-some-code-which-does... | |
| 1769 (catch 'bar | |
| 1770 (call-some-code-which-does... | |
| 1771 (throw 'foo nil)))) | |
| 1772 (throw 'bar nil))))) | |
| 1773 | |
| 1774 This would try to throw to the inner (catch 'bar)! | |
| 1775 | |
| 1776 --ben | |
| 1777 */ | |
| 428 | 1778 /* Unwind the specpdl stack */ |
| 771 | 1779 unbind_to (c->pdlcount); |
| 428 | 1780 catchlist = c->next; |
| 853 | 1781 check_catchlist_sanity (); |
| 617 | 1782 #endif /* Former code */ |
| 428 | 1783 |
| 1204 | 1784 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1785 if (profiling_active) |
| 1786 { | |
| 1787 while (backtrace_list != c->backlist) | |
| 1788 { | |
| 1789 profile_record_unwind (backtrace_list); | |
| 1790 backtrace_list = backtrace_list->next; | |
| 1791 } | |
| 1792 } | |
| 1793 else | |
| 1794 backtrace_list = c->backlist; | |
| 428 | 1795 lisp_eval_depth = c->lisp_eval_depth; |
| 1796 | |
| 442 | 1797 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1798 throw_level = 0; |
| 1799 #endif | |
| 1800 LONGJMP (c->jmp, 1); | |
| 1801 } | |
| 1802 | |
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1803 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
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1804 Lisp_Object, Lisp_Object)); |
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1805 |
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1806 DOESNT_RETURN |
| 428 | 1807 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
| 1808 Lisp_Object sig, Lisp_Object data) | |
| 1809 { | |
| 442 | 1810 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1811 /* die if we recurse more than is reasonable */ |
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1812 assert (++throw_level <= 20); |
| 428 | 1813 #endif |
| 1814 | |
| 1318 | 1815 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 1816 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 1817 #endif |
| 1123 | 1818 |
| 428 | 1819 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1820 "last resort" when there is no handler for this error and | |
| 1821 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1822 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1823 initialization stages) we would get in an infinite recursive |
| 1824 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1825 really-early-error-handler. | |
| 1826 | |
| 1827 Note that in fact the only time that the "last resort" | |
| 3025 | 1828 occurs is when there's no catch for `top-level' -- the |
| 1829 `top-level' catch and the catch-all error handler are | |
| 428 | 1830 established at the same time, in initial_command_loop/ |
| 1831 top_level_1. | |
| 1832 | |
| 853 | 1833 [[#### Fix this horrifitude!]] |
| 1834 | |
| 1835 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1836 */ |
| 1837 | |
| 1838 while (1) | |
| 1839 { | |
| 1840 REGISTER struct catchtag *c; | |
| 1841 | |
| 1842 #if 0 /* FSFmacs */ | |
| 1843 if (!NILP (tag)) /* #### */ | |
| 1844 #endif | |
| 1845 for (c = catchlist; c; c = c->next) | |
| 1846 { | |
| 2532 | 1847 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1848 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1849 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1850 unwind_to_catch (c, val, tag); | |
| 428 | 1851 } |
| 1852 if (!bomb_out_p) | |
| 1853 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1854 else | |
| 1855 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1856 } | |
| 1857 } | |
| 1858 | |
| 1859 /* See above, where CATCHLIST is defined, for a description of how | |
| 1860 Fthrow() works. | |
| 1861 | |
| 1862 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1863 back to the appropriate condition-case handler after (maybe) | |
| 1864 the debugger is entered. In that case, TAG is the value | |
| 1865 of Vcondition_handlers that was in place just after the | |
| 1866 condition-case handler was set up. The car of this will be | |
| 1867 some data referring to the handler: Its car will be Qunbound | |
| 1868 (thus, this tag can never be generated by Lisp code), and | |
| 1869 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1870 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1871 This works fine because Fthrow() does not care what TAG was | |
| 1872 passed to it: it just looks up the catch list for something | |
| 1873 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1874 back to the place that established the catch (in this case, | |
| 1875 condition_case_1). See below for more info. | |
| 1876 */ | |
| 1877 | |
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1878 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1879 Throw to the catch for TAG and return VALUE from it. |
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1880 |
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1881 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1882 back. Tags are the same if and only if they are `eq'. |
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1883 |
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1884 arguments: (TAG VALUE) |
| 428 | 1885 */ |
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1886 (args)) |
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1887 { |
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1888 int nargs; |
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1889 Lisp_Object tag, value; |
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1890 |
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1891 GET_LIST_LENGTH (args, nargs); |
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1892 if (nargs != 2) |
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1893 { |
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1894 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1895 } |
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1896 |
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1897 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1898 |
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1899 value = Feval (XCAR (XCDR (args))); |
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1900 |
| 444 | 1901 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1902 RETURN_NOT_REACHED (Qnil); |
| 428 | 1903 } |
| 1904 | |
| 1905 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1906 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1907 If BODYFORM completes normally, its value is returned | |
| 1908 after executing the UNWINDFORMS. | |
| 1909 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
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1910 |
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1911 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1912 */ |
| 1913 (args)) | |
| 1914 { | |
| 1915 /* This function can GC */ | |
| 1916 int speccount = specpdl_depth(); | |
| 1917 | |
| 1918 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1919 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1920 } |
| 1921 | |
| 1922 | |
| 1923 /************************************************************************/ | |
| 1292 | 1924 /* Trapping errors */ |
| 428 | 1925 /************************************************************************/ |
| 1926 | |
| 1927 static Lisp_Object | |
| 1928 condition_bind_unwind (Lisp_Object loser) | |
| 1929 { | |
| 617 | 1930 /* There is no problem freeing stuff here like there is in |
| 1931 condition_case_unwind(), because there are no outside pointers | |
| 1932 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1933 |
| 428 | 1934 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1935 Lisp_Object tem = XCAR (loser); | |
| 853 | 1936 int first = 1; |
| 428 | 1937 |
| 1938 while (CONSP (tem)) | |
| 1939 { | |
| 853 | 1940 Lisp_Object victim = tem; |
| 1941 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1942 free_opaque_ptr (XCAR (victim)); | |
| 1943 first = 0; | |
| 1944 tem = XCDR (victim); | |
| 428 | 1945 free_cons (victim); |
| 1946 } | |
| 1947 | |
| 1948 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1949 Vcondition_handlers = XCDR (loser); |
| 1950 | |
| 1951 free_cons (loser); | |
| 428 | 1952 return Qnil; |
| 1953 } | |
| 1954 | |
| 1955 static Lisp_Object | |
| 1956 condition_case_unwind (Lisp_Object loser) | |
| 1957 { | |
| 1958 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1959 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1960 catch. With the recent changes to unwind_to_catch(), the | |
| 1961 evil situation might not happen any more; it certainly could | |
| 1962 happen before because it did. But it's very precarious to rely | |
| 1963 on something like this. #### Instead we should rewrite, adopting | |
| 1964 the FSF's mechanism with a struct handler instead of | |
| 1965 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1966 to hold all of the values, and there's no possibility either of | |
| 1967 crashes from freeing objects too quickly, or objects not getting | |
| 1968 freed and hanging around till the next GC. | |
| 1969 | |
| 1970 In practice, the extra consing here should not matter because | |
| 1971 it only happens when we throw past the condition-case, which almost | |
| 1972 always is the result of an error. Most of the time, there will be | |
| 1973 no error, and we will free the objects below in the main function. | |
| 1974 | |
| 1975 --ben | |
| 1976 | |
| 1977 DO NOT DO: free_cons (XCAR (loser)); | |
| 1978 */ | |
| 1979 | |
| 428 | 1980 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1981 Vcondition_handlers = XCDR (loser); |
| 1982 | |
| 1983 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1984 return Qnil; |
| 1985 } | |
| 1986 | |
| 1987 /* Split out from condition_case_3 so that primitive C callers | |
| 1988 don't have to cons up a lisp handler form to be evaluated. */ | |
| 1989 | |
| 1990 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 1991 specified by HANDLERS. If no error occurs that is indicated by | |
| 1992 HANDLERS as something to be caught, the return value of this | |
| 1993 function is the return value from BFUN. If such an error does | |
| 1994 occur, HFUN is called, and its return value becomes the | |
| 1995 return value of condition_case_1(). The second argument passed | |
| 1996 to HFUN will always be HARG. The first argument depends on | |
| 1997 HANDLERS: | |
| 1998 | |
| 1999 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 2000 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 2001 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 2002 arguments passed to `signal'. The debugger is not invoked even if | |
| 2003 `debug-on-error' was set. | |
| 2004 | |
| 2005 A HANDLERS value of Qerror is the same as Qt except that the | |
| 2006 debugger is invoked if `debug-on-error' was set. | |
| 2007 | |
| 2008 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 2009 exactly as in `condition-case', and errors will be trapped | |
| 2010 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 2011 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 2012 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 2013 | |
| 2014 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 2015 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 2016 for why), establishes a catch whose tag is this new value of | |
| 2017 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 2018 it calls Fthrow(), setting TAG to this same new value of | |
| 2019 Vcondition_handlers and setting VAL to the same thing that will | |
| 2020 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 2021 jump point we just established, and we in turn just call the | |
| 2022 HFUN and return its value. | |
| 2023 | |
| 2024 For a real condition-case, HFUN will always be | |
| 2025 run_condition_case_handlers() and HARG is the argument VAR | |
| 2026 to condition-case. That function just binds VAR to the cons | |
| 2027 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 2028 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 2029 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 2030 it had *before* condition_case_1() was called. This maintains | |
| 2031 consistency (so that the state of things at exit of | |
| 2032 condition_case_1() is the same as at entry), and implies | |
| 2033 that the handler can signal the same error again (possibly | |
| 2034 after processing of its own), without getting in an infinite | |
| 2035 loop. */ | |
| 2036 | |
| 2037 Lisp_Object | |
| 2038 condition_case_1 (Lisp_Object handlers, | |
| 2039 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 2040 Lisp_Object barg, | |
| 2041 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2042 Lisp_Object harg) | |
| 2043 { | |
| 2044 int speccount = specpdl_depth(); | |
| 2045 struct catchtag c; | |
| 617 | 2046 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2047 |
| 2048 #if 0 /* FSFmacs */ | |
| 2049 c.tag = Qnil; | |
| 2050 #else | |
| 2051 /* Do consing now so out-of-memory error happens up front */ | |
| 2052 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2053 which is known specially by Fsignal. | |
| 617 | 2054 [[ This is an abomination, but to fix it would require either |
| 428 | 2055 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2056 or changing the byte-compiler output (no thanks).]] |
| 2057 | |
| 2058 The above comment is clearly wrong. FSF does not do it this way | |
| 2059 and did not change the byte-compiler output. Instead they use a | |
| 2060 `struct handler' to hold the various values (in place of our | |
| 2061 Vcondition_handlers) and chain them together, with pointers from | |
| 2062 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2063 consider moving to something similar, but not before I merge my | |
| 2064 stderr-proc workspace, which contains changes to these | |
| 2065 functions. --ben */ | |
| 428 | 2066 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2067 Vcondition_handlers); | |
| 2068 #endif | |
| 2069 c.val = Qnil; | |
| 853 | 2070 c.actual_tag = Qnil; |
| 2532 | 2071 c.backtrace = Qnil; |
| 428 | 2072 c.backlist = backtrace_list; |
| 2073 #if 0 /* FSFmacs */ | |
| 2074 /* #### */ | |
| 2075 c.handlerlist = handlerlist; | |
| 2076 #endif | |
| 2077 c.lisp_eval_depth = lisp_eval_depth; | |
| 2078 c.pdlcount = specpdl_depth(); | |
| 2079 #if 0 /* FSFmacs */ | |
| 2080 c.poll_suppress_count = async_timer_suppress_count; | |
| 2081 #endif | |
| 2082 c.gcpro = gcprolist; | |
| 2083 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2084 c.next = catchlist; | |
| 2085 | |
| 2086 if (SETJMP (c.jmp)) | |
| 2087 { | |
| 2088 /* throw does ungcpro, etc */ | |
| 2089 return (*hfun) (c.val, harg); | |
| 2090 } | |
| 2091 | |
| 2092 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2093 | |
| 2094 catchlist = &c; | |
| 2095 #if 0 /* FSFmacs */ | |
| 2096 h.handler = handlers; | |
| 2097 h.var = Qnil; | |
| 2098 h.next = handlerlist; | |
| 2099 h.tag = &c; | |
| 2100 handlerlist = &h; | |
| 2101 #else | |
| 2102 Vcondition_handlers = c.tag; | |
| 2103 #endif | |
| 2104 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2105 c.val = ((*bfun) (barg)); | |
| 2106 UNGCPRO; | |
| 617 | 2107 |
| 2108 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2109 GCPRO3 (harg, c.val, c.tag); | |
| 2110 | |
| 428 | 2111 catchlist = c.next; |
| 853 | 2112 check_catchlist_sanity (); |
| 617 | 2113 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2114 delete this here. */ | |
| 428 | 2115 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2116 unbind_to (speccount); |
| 617 | 2117 |
| 2118 UNGCPRO; | |
| 2119 /* free the conses *after* the unbind, because the unbind will run | |
| 2120 condition_case_unwind above. */ | |
| 853 | 2121 free_cons (XCAR (c.tag)); |
| 2122 free_cons (c.tag); | |
| 617 | 2123 return c.val; |
| 428 | 2124 } |
| 2125 | |
| 2126 static Lisp_Object | |
| 2127 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2128 { | |
| 2129 /* This function can GC */ | |
| 2130 #if 0 /* FSFmacs */ | |
| 2131 if (!NILP (h.var)) | |
| 2132 specbind (h.var, c.val); | |
| 2133 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2134 | |
| 2135 /* Note that this just undoes the binding of h.var; whoever | |
| 2136 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2137 throwing. */ | |
| 771 | 2138 unbind_to (c.pdlcount); |
| 428 | 2139 return val; |
| 2140 #else | |
| 2141 int speccount; | |
| 2142 | |
| 2143 CHECK_TRUE_LIST (val); | |
| 2144 if (NILP (var)) | |
| 2145 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2146 | |
| 2147 speccount = specpdl_depth(); | |
| 2148 specbind (var, Fcar (val)); | |
| 2149 val = Fprogn (Fcdr (val)); | |
| 771 | 2150 return unbind_to_1 (speccount, val); |
| 428 | 2151 #endif |
| 2152 } | |
| 2153 | |
| 2154 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2155 condition-case except that it takes three arguments rather | |
| 2156 than a single list of arguments. */ | |
| 2157 Lisp_Object | |
| 2158 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2159 { | |
| 2160 /* This function can GC */ | |
| 2161 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2162 { | |
| 2163 if (NILP (handler)) | |
| 2164 ; | |
| 2165 else if (CONSP (handler)) | |
| 2166 { | |
| 2167 Lisp_Object conditions = XCAR (handler); | |
| 2168 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2169 if (SYMBOLP (conditions)) | |
| 2170 ; | |
| 2171 else | |
| 2172 { | |
| 2173 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2174 if (!SYMBOLP (condition)) | |
| 2175 goto invalid_condition_handler; | |
| 2176 } | |
| 2177 } | |
| 2178 else | |
| 2179 { | |
| 2180 invalid_condition_handler: | |
| 563 | 2181 sferror ("Invalid condition handler", handler); |
| 428 | 2182 } |
| 2183 } | |
| 2184 | |
| 2185 CHECK_SYMBOL (var); | |
| 2186 | |
| 2187 return condition_case_1 (handlers, | |
| 2188 Feval, bodyform, | |
| 2189 run_condition_case_handlers, | |
| 2190 var); | |
| 2191 } | |
| 2192 | |
| 2193 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2194 Regain control when an error is signalled. | |
| 2195 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2196 Executes BODYFORM and returns its value if no error happens. | |
| 2197 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2198 where the BODY is made of Lisp expressions. | |
| 2199 | |
| 771 | 2200 A typical usage of `condition-case' looks like this: |
| 2201 | |
| 2202 (condition-case nil | |
| 2203 ;; you need a progn here if you want more than one statement ... | |
| 2204 (progn | |
| 2205 (do-something) | |
| 2206 (do-something-else)) | |
| 2207 (error | |
| 2208 (issue-warning-or) | |
| 2209 ;; but strangely, you don't need one here. | |
| 2210 (return-a-value-etc) | |
| 2211 )) | |
| 2212 | |
| 428 | 2213 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2214 error's condition names. If an error happens, the first applicable | |
| 2215 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2216 all errors, even those without the `error' condition name on them | |
| 2217 \(e.g. `quit'). | |
| 2218 | |
| 2219 The car of a handler may be a list of condition names | |
| 2220 instead of a single condition name. | |
| 2221 | |
| 2222 When a handler handles an error, | |
| 2223 control returns to the condition-case and the handler BODY... is executed | |
| 2224 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2225 VAR may be nil; then you do not get access to the signal information. | |
| 2226 | |
| 2227 The value of the last BODY form is returned from the condition-case. | |
| 2228 See also the function `signal' for more info. | |
| 2229 | |
| 2230 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2231 and the current catches, condition-cases, and bindings have all been | |
| 2232 popped back to the state they were in just before the call to | |
| 2233 `condition-case'. This means that resignalling the error from | |
| 2234 within the handler will not result in an infinite loop. | |
| 2235 | |
| 2236 If you want to establish an error handler that is called with the | |
| 2237 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2238 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2239 */ | |
| 2240 (args)) | |
| 2241 { | |
| 2242 /* This function can GC */ | |
| 2243 Lisp_Object var = XCAR (args); | |
| 2244 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2245 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2246 return condition_case_3 (bodyform, var, handlers); | |
| 2247 } | |
| 2248 | |
| 2249 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
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changeset
|
2250 Call FUNCTION with arguments ARGS, regaining control on error. |
|
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4686
diff
changeset
|
2251 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
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4686
diff
changeset
|
2252 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2253 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2254 that was current when `signal' was called, rather than when the handler | |
| 2255 was established. | |
| 2256 | |
| 2257 HANDLER should be a function of one argument, which is a cons of the args | |
| 2258 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2259 `signal' is called (this differs from `condition-case', which allows | |
| 2260 you to specify which errors are trapped). If the handler function | |
| 2261 returns, `signal' continues as if the handler were never invoked. | |
| 2262 \(It continues to look for handlers established earlier than this one, | |
| 2263 and invokes the standard error-handler if none is found.) | |
|
4693
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parents:
4686
diff
changeset
|
2264 |
|
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parents:
4686
diff
changeset
|
2265 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2266 */ |
| 2267 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2268 { | |
| 2269 /* This function can GC */ | |
| 2270 int speccount = specpdl_depth(); | |
| 2271 Lisp_Object tem; | |
| 2272 | |
| 853 | 2273 tem = Ffunction_max_args (args[0]); |
| 2274 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2275 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2276 invalid_argument ("Must be function of one argument", args[0]); | |
| 2277 | |
| 2278 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2279 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2280 record_unwind_protect (condition_bind_unwind, tem); | |
| 2281 Vcondition_handlers = tem; | |
| 2282 | |
| 2283 /* Caller should have GC-protected args */ | |
| 771 | 2284 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2285 } |
| 2286 | |
| 853 | 2287 /* This is the C version of the above function. It calls FUN, passing it |
| 2288 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2289 which they were signalled. (HANDLER is only invoked if there was no | |
| 2290 handler (either from condition-case or call-with-condition-handler) set | |
| 2291 later on that handled the signal; therefore, this is a real error. | |
| 2292 | |
| 2293 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2294 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2295 ARG be void * to facilitate passing structures, but I changed to | |
| 2296 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2297 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2298 to convert between Lisp_Objects and structure pointers. */ | |
| 2299 | |
| 2300 Lisp_Object | |
| 2301 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2302 Lisp_Object), | |
| 2303 Lisp_Object handler_arg, | |
| 2304 Lisp_Object (*fun) (Lisp_Object), | |
| 2305 Lisp_Object arg) | |
| 2306 { | |
| 2307 /* This function can GC */ | |
| 1111 | 2308 int speccount = specpdl_depth (); |
| 853 | 2309 Lisp_Object tem; |
| 2310 | |
| 2311 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2312 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2313 noseeum_cons (handler_arg, Qnil)), |
| 2314 Vcondition_handlers); | |
| 2315 record_unwind_protect (condition_bind_unwind, tem); | |
| 2316 Vcondition_handlers = tem; | |
| 2317 | |
| 2318 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2319 } | |
| 2320 | |
| 428 | 2321 static int |
| 2322 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2323 { | |
| 2324 if (EQ (type, Qt)) | |
| 2325 /* (condition-case c # (t c)) catches -all- signals | |
| 2326 * Use with caution! */ | |
| 2327 return 1; | |
| 2328 | |
| 2329 if (SYMBOLP (type)) | |
| 2330 return !NILP (Fmemq (type, conditions)); | |
| 2331 | |
| 2332 for (; CONSP (type); type = XCDR (type)) | |
| 2333 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2334 return 1; | |
| 2335 | |
| 2336 return 0; | |
| 2337 } | |
| 2338 | |
| 2339 static Lisp_Object | |
| 2340 return_from_signal (Lisp_Object value) | |
| 2341 { | |
| 2342 #if 1 | |
| 2343 /* Most callers are not prepared to handle gc if this | |
| 2344 returns. So, since this feature is not very useful, | |
| 2345 take it out. */ | |
| 2346 /* Have called debugger; return value to signaller */ | |
| 2347 return value; | |
| 2348 #else /* But the reality is that that stinks, because: */ | |
| 2349 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2350 to be continuable!! */ | |
| 563 | 2351 signal_error (Qunimplemented, |
| 2352 "Returning a value from an error is no longer supported", | |
| 2353 Qunbound); | |
| 428 | 2354 #endif |
| 2355 } | |
| 2356 | |
| 2357 | |
| 2358 /************************************************************************/ | |
| 2359 /* the workhorse error-signaling function */ | |
| 2360 /************************************************************************/ | |
| 2361 | |
| 853 | 2362 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2363 that won't get signalled for errors occurring when | |
| 2364 call_with_suspended_errors() was invoked. */ | |
| 2365 | |
| 872 | 2366 /* Don't make static or it might be compiled away */ |
| 2367 void signal_1 (void); | |
| 2368 | |
| 2369 void | |
| 853 | 2370 signal_1 (void) |
| 2371 { | |
| 2372 } | |
| 2373 | |
| 428 | 2374 /* #### This function has not been synched with FSF. It diverges |
| 2375 significantly. */ | |
| 2376 | |
| 853 | 2377 /* The simplest external error function: it would be called |
| 2378 signal_continuable_error() in the terminology below, but it's | |
| 2379 Lisp-callable. */ | |
| 2380 | |
| 2381 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2382 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2383 An error symbol is a symbol defined using `define-error'. | |
| 2384 DATA should be a list. Its elements are printed as part of the error message. | |
| 2385 If the signal is handled, DATA is made available to the handler. | |
| 2386 See also the function `signal-error', and the functions to handle errors: | |
| 2387 `condition-case' and `call-with-condition-handler'. | |
| 2388 | |
| 2389 Note that this function can return, if the debugger is invoked and the | |
| 2390 user invokes the "return from signal" option. | |
| 2391 */ | |
| 2392 (error_symbol, data)) | |
| 428 | 2393 { |
| 2394 /* This function can GC */ | |
| 853 | 2395 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2396 Lisp_Object conditions = Qnil; | |
| 2397 Lisp_Object handlers = Qnil; | |
| 428 | 2398 /* signal_call_debugger() could get called more than once |
| 2399 (once when a call-with-condition-handler is about to | |
| 2400 be dealt with, and another when a condition-case handler | |
| 2401 is about to be invoked). So make sure the debugger and/or | |
| 2402 stack trace aren't done more than once. */ | |
| 2403 int stack_trace_displayed = 0; | |
| 2404 int debugger_entered = 0; | |
| 853 | 2405 |
| 2406 /* Fsignal() is one of these functions that's called all the time | |
| 2407 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2408 protect the objects because all sorts of weird stuff could | |
| 2409 happen. */ | |
| 2410 | |
| 2411 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2412 | |
| 2413 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2414 signal_1 (); | |
| 428 | 2415 |
| 2416 if (!initialized) | |
| 2417 { | |
| 2418 /* who knows how much has been initialized? Safest bet is | |
| 2419 just to bomb out immediately. */ | |
| 771 | 2420 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2421 ABORT (); |
| 428 | 2422 } |
| 2423 | |
| 3092 | 2424 #ifndef NEW_GC |
| 1123 | 2425 assert (!gc_in_progress); |
| 3092 | 2426 #endif /* not NEW_GC */ |
| 1123 | 2427 |
| 2428 /* We abort if in_display and we are not protected, as garbage | |
| 2429 collections and non-local exits will invariably be fatal, but in | |
| 2430 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2431 */ | |
| 2432 | |
| 1318 | 2433 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2434 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2435 #endif |
| 428 | 2436 |
| 853 | 2437 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2438 |
| 2439 for (handlers = Vcondition_handlers; | |
| 2440 CONSP (handlers); | |
| 2441 handlers = XCDR (handlers)) | |
| 2442 { | |
| 2443 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2444 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2445 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2446 | |
| 2447 if (!UNBOUNDP (handler_fun)) | |
| 2448 { | |
| 2449 /* call-with-condition-handler */ | |
| 2450 Lisp_Object tem; | |
| 2451 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2452 struct gcpro ngcpro1; | |
| 2453 NGCPRO1 (all_handlers); | |
| 2454 Vcondition_handlers = outer_handlers; | |
| 2455 | |
| 853 | 2456 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2457 outer_handlers, 1, |
| 2458 &stack_trace_displayed, | |
| 2459 &debugger_entered); | |
| 2460 if (!UNBOUNDP (tem)) | |
| 2461 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2462 | |
| 853 | 2463 if (OPAQUE_PTRP (handler_fun)) |
| 2464 { | |
| 2465 if (NILP (handler_data)) | |
| 2466 { | |
| 2467 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2468 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2469 (get_opaque_ptr (handler_fun)); | |
| 2470 | |
| 2471 tem = (*hfun) (error_symbol, data); | |
| 2472 } | |
| 2473 else | |
| 2474 { | |
| 2475 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2476 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2477 (get_opaque_ptr (handler_fun)); | |
| 2478 | |
| 2479 assert (NILP (XCDR (handler_data))); | |
| 2480 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2481 } | |
| 2482 } | |
| 2483 else | |
| 2484 { | |
| 2485 tem = Fcons (error_symbol, data); | |
| 2486 if (NILP (handler_data)) | |
| 2487 tem = call1 (handler_fun, tem); | |
| 2488 else | |
| 2489 { | |
| 2490 /* (This code won't be used (for now?).) */ | |
| 2491 struct gcpro nngcpro1; | |
| 2492 Lisp_Object args[3]; | |
| 2493 NNGCPRO1 (args[0]); | |
| 2494 nngcpro1.nvars = 3; | |
| 2495 args[0] = handler_fun; | |
| 2496 args[1] = tem; | |
| 2497 args[2] = handler_data; | |
| 2498 nngcpro1.var = args; | |
| 2499 tem = Fapply (3, args); | |
| 2500 NNUNGCPRO; | |
| 2501 } | |
| 2502 } | |
| 428 | 2503 NUNGCPRO; |
| 2504 #if 0 | |
| 2505 if (!EQ (tem, Qsignal)) | |
| 2506 return return_from_signal (tem); | |
| 2507 #endif | |
| 2508 /* If handler didn't throw, try another handler */ | |
| 2509 Vcondition_handlers = all_handlers; | |
| 2510 } | |
| 2511 | |
| 2512 /* It's a condition-case handler */ | |
| 2513 | |
| 2514 /* t is used by handlers for all conditions, set up by C code. | |
| 2515 * debugger is not called even if debug_on_error */ | |
| 2516 else if (EQ (handler_data, Qt)) | |
| 2517 { | |
| 2518 UNGCPRO; | |
|
4677
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2519 throw_or_bomb_out (handlers, Fcons (error_symbol, data), |
|
8f1ee2d15784
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2520 0, Qnil, Qnil); |
| 428 | 2521 } |
| 2522 /* `error' is used similarly to the way `t' is used, but in | |
| 2523 addition it invokes the debugger if debug_on_error. | |
| 2524 This is normally used for the outer command-loop error | |
| 2525 handler. */ | |
| 2526 else if (EQ (handler_data, Qerror)) | |
| 2527 { | |
| 853 | 2528 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2529 data, | |
| 428 | 2530 outer_handlers, 0, |
| 2531 &stack_trace_displayed, | |
| 2532 &debugger_entered); | |
| 2533 | |
| 2534 UNGCPRO; | |
| 2535 if (!UNBOUNDP (tem)) | |
| 2536 return return_from_signal (tem); | |
| 2537 | |
| 853 | 2538 tem = Fcons (error_symbol, data); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2539 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2540 } |
| 2541 else | |
| 2542 { | |
| 2543 /* handler established by real (Lisp) condition-case */ | |
| 2544 Lisp_Object h; | |
| 2545 | |
| 2546 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2547 { | |
| 2548 Lisp_Object clause = Fcar (h); | |
| 2549 Lisp_Object tem = Fcar (clause); | |
| 2550 | |
| 2551 if (condition_type_p (tem, conditions)) | |
| 2552 { | |
| 853 | 2553 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2554 outer_handlers, 1, |
| 2555 &stack_trace_displayed, | |
| 2556 &debugger_entered); | |
| 2557 UNGCPRO; | |
| 2558 if (!UNBOUNDP (tem)) | |
| 2559 return return_from_signal (tem); | |
| 2560 | |
| 2561 /* Doesn't return */ | |
| 853 | 2562 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
|
2563 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2564 } |
| 2565 } | |
| 2566 } | |
| 2567 } | |
| 2568 | |
| 2569 /* If no handler is present now, try to run the debugger, | |
| 2570 and if that fails, throw to top level. | |
| 2571 | |
| 2572 #### The only time that no handler is present is during | |
| 2573 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2574 there is no `top-level' catch. (That's why the |
| 428 | 2575 "bomb-out" hack was added.) |
| 2576 | |
| 853 | 2577 [[#### Fix this horrifitude!]] |
| 2578 | |
| 2579 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2580 | |
| 2581 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2582 &stack_trace_displayed, |
| 2583 &debugger_entered); | |
| 2584 UNGCPRO; | |
| 853 | 2585 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2586 data); /* Doesn't return */ | |
| 2268 | 2587 RETURN_NOT_REACHED (Qnil); |
| 428 | 2588 } |
| 2589 | |
| 2590 /****************** Error functions class 1 ******************/ | |
| 2591 | |
| 2592 /* Class 1: General functions that signal an error. | |
| 2593 These functions take an error type and a list of associated error | |
| 2594 data. */ | |
| 2595 | |
| 853 | 2596 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2597 |
| 2598 /* Signal a non-continuable error. */ | |
| 2599 | |
| 2600 DOESNT_RETURN | |
| 563 | 2601 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2602 { |
| 2603 for (;;) | |
| 2604 Fsignal (sig, data); | |
| 2605 } | |
| 853 | 2606 |
| 2607 #ifdef ERROR_CHECK_CATCH | |
| 2608 | |
| 2609 void | |
| 2610 check_catchlist_sanity (void) | |
| 2611 { | |
| 2612 #if 0 | |
| 2613 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2614 bug! */ | |
| 442 | 2615 struct catchtag *c; |
| 2616 int found_error_tag = 0; | |
| 2617 | |
| 2618 for (c = catchlist; c; c = c->next) | |
| 2619 { | |
| 2620 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2621 { | |
| 2622 found_error_tag = 1; | |
| 2623 break; | |
| 2624 } | |
| 2625 } | |
| 2626 | |
| 2627 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2628 #endif /* vou me tomar no cul */ |
| 2629 } | |
| 2630 | |
| 2631 void | |
| 2632 check_specbind_stack_sanity (void) | |
| 2633 { | |
| 2634 } | |
| 2635 | |
| 2636 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2637 |
| 2638 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2639 according to ERRB. CLASS is the class of warning and should | |
| 2640 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2641 Qresource, etc.). */ | |
| 2642 | |
| 2643 void | |
| 1204 | 2644 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2645 Error_Behavior errb) |
| 428 | 2646 { |
| 2647 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2648 return; | |
| 793 | 2649 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2650 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2651 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2652 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2653 else |
|
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|
2654 signal_error_1 (sig, data); |
| 428 | 2655 } |
| 2656 | |
| 2657 /* Signal a continuable error or display a warning or do nothing, | |
| 2658 according to ERRB. */ | |
| 2659 | |
| 2660 Lisp_Object | |
| 563 | 2661 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2662 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2663 { |
| 2664 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2665 return Qnil; | |
| 793 | 2666 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2667 { | |
| 1204 | 2668 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2669 return Qnil; |
| 2670 } | |
| 428 | 2671 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2672 { | |
| 1204 | 2673 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2674 return Qnil; |
| 2675 } | |
| 2676 else | |
| 2677 return Fsignal (sig, data); | |
| 2678 } | |
| 2679 | |
| 2680 | |
| 2681 /****************** Error functions class 2 ******************/ | |
| 2682 | |
| 563 | 2683 /* Class 2: Signal an error with a string and an associated object. |
| 2684 Normally these functions are used to attach one associated object, | |
| 2685 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2686 than one object, make a list of the objects with Qunbound as the | |
| 2687 first element. (If you have specifically two objects to attach, | |
| 2688 consider using the function in class 3 below.) These functions | |
| 2689 signal an error of a specified type, whose data is one or more | |
| 2690 objects (usually two), a string the related Lisp object(s) | |
| 2691 specified as FROB. */ | |
| 2692 | |
| 2693 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2694 to signal_error_1(). */ | |
| 2695 | |
| 2696 Lisp_Object | |
|
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|
2697 build_error_data (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2698 { |
| 2699 if (EQ (frob, Qunbound)) | |
| 2700 frob = Qnil; | |
| 2701 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2702 frob = XCDR (frob); | |
| 2703 else | |
| 2704 frob = list1 (frob); | |
| 2705 if (!reason) | |
| 2706 return frob; | |
| 2707 else | |
| 771 | 2708 return Fcons (build_msg_string (reason), frob); |
| 563 | 2709 } |
| 2710 | |
| 2711 DOESNT_RETURN | |
|
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2712 signal_error (Lisp_Object type, const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2713 { |
| 2714 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2715 } | |
| 2716 | |
|
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2717 /* NOTE NOTE NOTE: If you feel you need signal_ierror() or something |
|
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|
2718 similar when reason is a non-ASCII message, you're probably doing |
|
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|
2719 something wrong. When you have an error message from an external |
|
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|
2720 source, you should put the error message as the first item in FROB and |
|
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|
2721 put a string in REASON indicating what you were doing when the error |
|
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|
2722 message occurred. Use signal_error_2() for such a case. */ |
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|
2723 |
| 563 | 2724 void |
|
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|
2725 maybe_signal_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2726 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2727 Error_Behavior errb) |
| 563 | 2728 { |
| 2729 /* Optimization: */ | |
| 2730 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2731 return; | |
| 1204 | 2732 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2733 } |
| 2734 | |
| 2735 Lisp_Object | |
|
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|
2736 signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2737 Lisp_Object frob) |
| 2738 { | |
| 2739 return Fsignal (type, build_error_data (reason, frob)); | |
| 2740 } | |
| 2741 | |
| 2742 Lisp_Object | |
|
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2743 maybe_signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2744 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2745 Error_Behavior errb) |
| 563 | 2746 { |
| 2747 /* Optimization: */ | |
| 2748 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2749 return Qnil; | |
| 2750 return maybe_signal_continuable_error_1 (type, | |
| 2751 build_error_data (reason, frob), | |
| 1204 | 2752 class_, errb); |
| 563 | 2753 } |
| 2754 | |
| 2755 | |
| 2756 /****************** Error functions class 3 ******************/ | |
| 2757 | |
| 2758 /* Class 3: Signal an error with a string and two associated objects. | |
| 2759 These functions signal an error of a specified type, whose data | |
| 2760 is three objects, a string and two related Lisp objects. | |
| 2761 (The equivalent could be accomplished using the class 2 functions, | |
| 2762 but these are more convenient in this particular case.) */ | |
| 2763 | |
| 2764 DOESNT_RETURN | |
|
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|
2765 signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2766 Lisp_Object frob0, Lisp_Object frob1) |
| 2767 { | |
| 771 | 2768 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2769 frob1)); |
| 2770 } | |
| 2771 | |
| 2772 void | |
|
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|
2773 maybe_signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2774 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2775 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2776 { |
| 2777 /* Optimization: */ | |
| 2778 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2779 return; | |
| 771 | 2780 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2781 frob1), class_, errb); |
| 563 | 2782 } |
| 2783 | |
| 2784 Lisp_Object | |
|
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|
2785 signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2786 Lisp_Object frob0, Lisp_Object frob1) |
| 2787 { | |
| 771 | 2788 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2789 frob1)); |
| 2790 } | |
| 2791 | |
| 2792 Lisp_Object | |
|
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|
2793 maybe_signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2794 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2795 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2796 { |
| 2797 /* Optimization: */ | |
| 2798 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2799 return Qnil; | |
| 2800 return maybe_signal_continuable_error_1 | |
| 771 | 2801 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2802 class_, errb); |
| 563 | 2803 } |
| 2804 | |
| 2805 | |
| 2806 /****************** Error functions class 4 ******************/ | |
| 2807 | |
| 2808 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2809 These functions signal an error of a specified type, whose data |
| 428 | 2810 is a single string, created using the arguments. */ |
| 2811 | |
| 2812 DOESNT_RETURN | |
|
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|
2813 signal_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 442 | 2814 { |
| 2815 Lisp_Object obj; | |
| 2816 va_list args; | |
| 2817 | |
| 2818 va_start (args, fmt); | |
|
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|
2819 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2820 va_end (args); |
| 2821 | |
| 2822 /* Fsignal GC-protects its args */ | |
| 563 | 2823 signal_error (type, 0, obj); |
| 442 | 2824 } |
| 2825 | |
| 2826 void | |
| 1204 | 2827 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
|
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|
2828 const Ascbyte *fmt, ...) |
| 442 | 2829 { |
| 2830 Lisp_Object obj; | |
| 2831 va_list args; | |
| 2832 | |
| 2833 /* Optimization: */ | |
| 2834 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2835 return; | |
| 2836 | |
| 2837 va_start (args, fmt); | |
|
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|
2838 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2839 va_end (args); |
| 2840 | |
| 2841 /* Fsignal GC-protects its args */ | |
| 1204 | 2842 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2843 } |
| 2844 | |
| 2845 Lisp_Object | |
|
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|
2846 signal_continuable_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 428 | 2847 { |
| 2848 Lisp_Object obj; | |
| 2849 va_list args; | |
| 2850 | |
| 2851 va_start (args, fmt); | |
|
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|
2852 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2853 va_end (args); |
| 2854 | |
| 2855 /* Fsignal GC-protects its args */ | |
| 2856 return Fsignal (type, list1 (obj)); | |
| 2857 } | |
| 2858 | |
| 2859 Lisp_Object | |
| 1204 | 2860 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
|
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|
2861 Error_Behavior errb, const Ascbyte *fmt, ...) |
| 442 | 2862 { |
| 2863 Lisp_Object obj; | |
| 2864 va_list args; | |
| 2865 | |
| 2866 /* Optimization: */ | |
| 2867 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2868 return Qnil; | |
| 2869 | |
| 2870 va_start (args, fmt); | |
|
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|
2871 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2872 va_end (args); |
| 2873 | |
| 2874 /* Fsignal GC-protects its args */ | |
| 1204 | 2875 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2876 } |
| 2877 | |
| 2878 | |
| 2879 /****************** Error functions class 5 ******************/ | |
| 2880 | |
| 563 | 2881 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2882 These functions signal an error of a specified type, whose data |
| 563 | 2883 is a one or more objects, a string (created using the arguments) |
| 2884 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2885 is the same as for class 2.) | |
| 2886 | |
| 2887 There is no need for a class 6 because you can always attach 2 | |
| 2888 objects using class 5 (for FROB, specify a list with three | |
| 2889 elements, the first of which is Qunbound), and these functions are | |
| 2890 not commonly used. | |
| 2891 */ | |
| 442 | 2892 |
| 2893 DOESNT_RETURN | |
|
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|
2894 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const Ascbyte *fmt, |
| 563 | 2895 ...) |
| 442 | 2896 { |
| 2897 Lisp_Object obj; | |
| 2898 va_list args; | |
| 2899 | |
| 2900 va_start (args, fmt); | |
|
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|
2901 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2902 va_end (args); |
| 2903 | |
| 2904 /* Fsignal GC-protects its args */ | |
| 563 | 2905 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2906 } |
| 2907 | |
| 2908 void | |
| 563 | 2909 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2910 Lisp_Object class_, Error_Behavior errb, |
|
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|
2911 const Ascbyte *fmt, ...) |
| 442 | 2912 { |
| 2913 Lisp_Object obj; | |
| 2914 va_list args; | |
| 2915 | |
| 2916 /* Optimization: */ | |
| 2917 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2918 return; | |
| 2919 | |
| 2920 va_start (args, fmt); | |
|
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|
2921 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2922 va_end (args); |
| 2923 | |
| 2924 /* Fsignal GC-protects its args */ | |
| 1204 | 2925 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2926 errb); |
| 428 | 2927 } |
| 2928 | |
| 2929 Lisp_Object | |
| 563 | 2930 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
|
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|
2931 const Ascbyte *fmt, ...) |
| 428 | 2932 { |
| 2933 Lisp_Object obj; | |
| 2934 va_list args; | |
| 2935 | |
| 2936 va_start (args, fmt); | |
|
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|
2937 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2938 va_end (args); |
| 2939 | |
| 2940 /* Fsignal GC-protects its args */ | |
| 563 | 2941 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2942 } |
| 2943 | |
| 2944 Lisp_Object | |
| 563 | 2945 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2946 Lisp_Object class_, |
| 578 | 2947 Error_Behavior errb, |
|
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|
2948 const Ascbyte *fmt, ...) |
| 428 | 2949 { |
| 2950 Lisp_Object obj; | |
| 2951 va_list args; | |
| 2952 | |
| 2953 /* Optimization: */ | |
| 2954 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2955 return Qnil; | |
| 2956 | |
| 2957 va_start (args, fmt); | |
|
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|
2958 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2959 va_end (args); |
| 2960 | |
| 2961 /* Fsignal GC-protects its args */ | |
| 563 | 2962 return maybe_signal_continuable_error_1 (type, |
| 2963 Fcons (obj, | |
| 2964 build_error_data (0, frob)), | |
| 1204 | 2965 class_, errb); |
| 428 | 2966 } |
| 2967 | |
| 2968 | |
| 2969 /* This is what the QUIT macro calls to signal a quit */ | |
| 2970 void | |
| 2971 signal_quit (void) | |
| 2972 { | |
| 853 | 2973 /* This function cannot GC. GC is prohibited because most callers do |
| 2974 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2975 --ben */ | |
| 2976 | |
| 2977 int count; | |
| 2978 | |
| 428 | 2979 if (EQ (Vquit_flag, Qcritical)) |
| 2980 debug_on_quit |= 2; /* set critical bit. */ | |
| 2981 Vquit_flag = Qnil; | |
| 853 | 2982 count = begin_gc_forbidden (); |
| 428 | 2983 /* note that this is continuable. */ |
| 2984 Fsignal (Qquit, Qnil); | |
| 853 | 2985 unbind_to (count); |
| 428 | 2986 } |
| 2987 | |
| 2988 | |
| 563 | 2989 /************************ convenience error functions ***********************/ |
| 2990 | |
| 436 | 2991 Lisp_Object |
| 428 | 2992 signal_void_function_error (Lisp_Object function) |
| 2993 { | |
| 436 | 2994 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 2995 } |
| 2996 | |
| 436 | 2997 Lisp_Object |
| 428 | 2998 signal_invalid_function_error (Lisp_Object function) |
| 2999 { | |
| 436 | 3000 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 3001 } |
| 3002 | |
| 436 | 3003 Lisp_Object |
| 428 | 3004 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 3005 { | |
| 436 | 3006 return Fsignal (Qwrong_number_of_arguments, |
| 3007 list2 (function, make_int (nargs))); | |
| 428 | 3008 } |
| 3009 | |
| 3010 /* Used in list traversal macros for efficiency. */ | |
| 436 | 3011 DOESNT_RETURN |
| 428 | 3012 signal_malformed_list_error (Lisp_Object list) |
| 3013 { | |
| 563 | 3014 signal_error (Qmalformed_list, 0, list); |
| 428 | 3015 } |
| 3016 | |
| 436 | 3017 DOESNT_RETURN |
| 428 | 3018 signal_malformed_property_list_error (Lisp_Object list) |
| 3019 { | |
| 563 | 3020 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 3021 } |
| 3022 | |
| 436 | 3023 DOESNT_RETURN |
| 428 | 3024 signal_circular_list_error (Lisp_Object list) |
| 3025 { | |
| 563 | 3026 signal_error (Qcircular_list, 0, list); |
| 428 | 3027 } |
| 3028 | |
| 436 | 3029 DOESNT_RETURN |
| 428 | 3030 signal_circular_property_list_error (Lisp_Object list) |
| 3031 { | |
| 563 | 3032 signal_error (Qcircular_property_list, 0, list); |
| 428 | 3033 } |
| 442 | 3034 |
| 2267 | 3035 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 3036 DOESNT_RETURN |
|
4952
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Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
3037 syntax_error (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3038 { |
| 563 | 3039 signal_error (Qsyntax_error, reason, frob); |
| 442 | 3040 } |
| 3041 | |
| 3042 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3043 syntax_error_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3044 { |
| 563 | 3045 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 3046 } | |
| 3047 | |
| 3048 void | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3049 maybe_syntax_error (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3050 Lisp_Object class_, Error_Behavior errb) |
| 3051 { | |
| 3052 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3053 } |
| 3054 | |
| 3055 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3056 sferror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3057 { |
| 3058 signal_error (Qstructure_formation_error, reason, frob); | |
| 3059 } | |
| 3060 | |
| 3061 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3062 sferror_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3063 { |
| 3064 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3065 } | |
| 3066 | |
| 3067 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3068 maybe_sferror (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3069 Lisp_Object class_, Error_Behavior errb) |
| 3070 { | |
| 3071 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3072 } |
| 3073 | |
| 3074 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3075 invalid_argument (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3076 { |
| 563 | 3077 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3078 } |
| 3079 | |
| 3080 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3081 invalid_argument_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3082 Lisp_Object frob2) |
| 442 | 3083 { |
| 563 | 3084 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3085 } | |
| 3086 | |
| 3087 void | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3088 maybe_invalid_argument (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3089 Lisp_Object class_, Error_Behavior errb) |
| 3090 { | |
| 3091 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3092 } |
| 3093 | |
| 3094 DOESNT_RETURN | |
|
5084
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3095 invalid_keyword_argument (Lisp_Object function, Lisp_Object keyword) |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3096 { |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3097 signal_error_1 (Qinvalid_keyword_argument, list2 (function, keyword)); |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3098 } |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3099 |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3100 DOESNT_RETURN |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3101 invalid_constant (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3102 { |
| 3103 signal_error (Qinvalid_constant, reason, frob); | |
| 3104 } | |
| 3105 | |
| 3106 DOESNT_RETURN | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
3107 invalid_constant_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3108 Lisp_Object frob2) |
| 563 | 3109 { |
| 3110 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3111 } | |
| 3112 | |
| 3113 void | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3114 maybe_invalid_constant (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3115 Lisp_Object class_, Error_Behavior errb) |
| 3116 { | |
| 3117 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3118 } |
| 3119 | |
| 3120 DOESNT_RETURN | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3121 invalid_operation (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3122 { |
| 563 | 3123 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3124 } |
| 3125 | |
| 3126 DOESNT_RETURN | |
|
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Ben Wing <ben@xemacs.org>
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4846
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changeset
|
3127 invalid_operation_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3128 Lisp_Object frob2) |
| 442 | 3129 { |
| 563 | 3130 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3131 } | |
| 3132 | |
| 3133 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3134 maybe_invalid_operation (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3135 Lisp_Object class_, Error_Behavior errb) |
| 3136 { | |
| 3137 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3138 } |
| 3139 | |
| 3140 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3141 invalid_change (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3142 { |
| 563 | 3143 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3144 } |
| 3145 | |
| 3146 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3147 invalid_change_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3148 { |
| 563 | 3149 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3150 } | |
| 3151 | |
| 3152 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3153 maybe_invalid_change (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3154 Lisp_Object class_, Error_Behavior errb) |
| 3155 { | |
| 3156 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3157 } |
| 3158 | |
| 3159 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3160 invalid_state (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3161 { |
| 3162 signal_error (Qinvalid_state, reason, frob); | |
| 3163 } | |
| 3164 | |
| 3165 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3166 invalid_state_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3167 { |
| 3168 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3169 } | |
| 3170 | |
| 3171 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3172 maybe_invalid_state (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3173 Lisp_Object class_, Error_Behavior errb) |
| 3174 { | |
| 3175 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3176 } |
| 3177 | |
| 3178 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3179 wtaerror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3180 { |
| 3181 signal_error (Qwrong_type_argument, reason, frob); | |
| 3182 } | |
| 3183 | |
| 3184 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3185 stack_overflow (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3186 { |
| 3187 signal_error (Qstack_overflow, reason, frob); | |
| 3188 } | |
| 3189 | |
| 3190 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3191 out_of_memory (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3192 { |
| 3193 signal_error (Qout_of_memory, reason, frob); | |
| 3194 } | |
| 3195 | |
| 428 | 3196 |
| 3197 /************************************************************************/ | |
| 3198 /* User commands */ | |
| 3199 /************************************************************************/ | |
| 3200 | |
| 3201 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3202 Return t if FUNCTION makes provisions for interactive calling. | |
| 3203 This means it contains a description for how to read arguments to give it. | |
| 3204 The value is nil for an invalid function or a symbol with no function | |
| 3205 definition. | |
| 3206 | |
| 3207 Interactively callable functions include | |
| 3208 | |
| 3209 -- strings and vectors (treated as keyboard macros) | |
| 3210 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3211 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3212 (i.e. the interactive flag) | |
| 3213 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3214 value | |
| 3215 -- subrs (built-in functions) that are interactively callable | |
| 3216 | |
| 3217 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3218 */ | |
| 3219 (function)) | |
| 3220 { | |
| 3221 Lisp_Object fun = indirect_function (function, 0); | |
| 3222 | |
| 3223 if (COMPILED_FUNCTIONP (fun)) | |
| 3224 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3225 | |
| 3226 /* Lists may represent commands. */ | |
| 3227 if (CONSP (fun)) | |
| 3228 { | |
| 3229 Lisp_Object funcar = XCAR (fun); | |
| 3230 if (EQ (funcar, Qlambda)) | |
| 3231 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3232 if (EQ (funcar, Qautoload)) | |
| 3233 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3234 else | |
| 3235 return Qnil; | |
| 3236 } | |
| 3237 | |
| 3238 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3239 interactive spec. */ | |
| 3240 if (SUBRP (fun)) | |
| 3241 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3242 | |
| 3243 /* Strings and vectors are keyboard macros. */ | |
| 3244 if (VECTORP (fun) || STRINGP (fun)) | |
| 3245 return Qt; | |
| 3246 | |
| 3247 /* Everything else (including Qunbound) is not a command. */ | |
| 3248 return Qnil; | |
| 3249 } | |
| 3250 | |
| 3251 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3252 Execute CMD as an editor command. | |
| 3253 CMD must be an object that satisfies the `commandp' predicate. | |
| 3254 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3255 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3256 when reading the arguments. | |
| 3257 */ | |
| 444 | 3258 (cmd, record_flag, keys)) |
| 428 | 3259 { |
| 3260 /* This function can GC */ | |
| 3261 Lisp_Object prefixarg; | |
| 3262 Lisp_Object final = cmd; | |
| 4162 | 3263 PROFILE_DECLARE(); |
| 428 | 3264 struct console *con = XCONSOLE (Vselected_console); |
| 3265 | |
| 3266 prefixarg = con->prefix_arg; | |
| 3267 con->prefix_arg = Qnil; | |
| 3268 Vcurrent_prefix_arg = prefixarg; | |
| 3269 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3270 | |
| 3271 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3272 return run_hook (Qdisabled_command_hook); |
| 428 | 3273 |
| 3274 for (;;) | |
| 3275 { | |
| 3276 final = indirect_function (cmd, 1); | |
| 3277 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3278 { |
| 3279 /* do_autoload GCPROs both arguments */ | |
| 3280 do_autoload (final, cmd); | |
| 3281 } | |
| 428 | 3282 else |
| 3283 break; | |
| 3284 } | |
| 3285 | |
| 3286 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3287 { | |
| 3288 backtrace.function = &Qcall_interactively; | |
| 3289 backtrace.args = &cmd; | |
| 3290 backtrace.nargs = 1; | |
| 3291 backtrace.evalargs = 0; | |
| 1292 | 3292 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3293 backtrace.debug_on_exit = 0; |
| 1292 | 3294 backtrace.function_being_called = 0; |
| 428 | 3295 PUSH_BACKTRACE (backtrace); |
| 3296 | |
| 1292 | 3297 PROFILE_ENTER_FUNCTION (); |
| 444 | 3298 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3299 PROFILE_EXIT_FUNCTION (); |
| 428 | 3300 |
| 3301 POP_BACKTRACE (backtrace); | |
| 3302 return final; | |
| 3303 } | |
| 3304 else if (STRINGP (final) || VECTORP (final)) | |
| 3305 { | |
| 3306 return Fexecute_kbd_macro (final, prefixarg); | |
| 3307 } | |
| 3308 else | |
| 3309 { | |
| 3310 Fsignal (Qwrong_type_argument, | |
| 3311 Fcons (Qcommandp, | |
| 3312 (EQ (cmd, final) | |
| 3313 ? list1 (cmd) | |
| 3314 : list2 (cmd, final)))); | |
| 3315 return Qnil; | |
| 3316 } | |
| 3317 } | |
| 3318 | |
| 3319 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3320 Return t if function in which this appears was called interactively. | |
| 3321 This means that the function was called with call-interactively (which | |
| 3322 includes being called as the binding of a key) | |
| 3323 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3324 */ | |
| 3325 ()) | |
| 3326 { | |
| 3327 REGISTER struct backtrace *btp; | |
| 3328 REGISTER Lisp_Object fun; | |
| 3329 | |
| 3330 if (!INTERACTIVE) | |
| 3331 return Qnil; | |
| 3332 | |
| 3333 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3334 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3335 function). Note that *btp->function may be a symbol pointing at a | |
| 3336 compiled function. */ | |
| 3337 btp = backtrace_list; | |
| 3338 | |
| 3339 #if 0 /* FSFmacs */ | |
| 3340 | |
| 3341 /* #### FSFmacs does the following instead. I can't figure | |
| 3342 out which one is more correct. */ | |
| 3343 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3344 the top for Finteractive_p itself. If so, skip it. */ | |
| 3345 fun = Findirect_function (*btp->function); | |
| 3346 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3347 btp = btp->next; | |
| 3348 | |
| 3349 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3350 may be a frame for Fbyte_code. Now, given the strictest | |
| 3351 definition, this function isn't really being called | |
| 3352 interactively, but because that's the way Emacs 18 always builds | |
| 3353 byte-compiled functions, we'll accept it for now. */ | |
| 3354 if (EQ (*btp->function, Qbyte_code)) | |
| 3355 btp = btp->next; | |
| 3356 | |
| 3357 /* If this isn't a byte-compiled function, then we may now be | |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
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4846
diff
changeset
|
3358 looking at several frames for special operators. Skip past them. */ |
| 428 | 3359 while (btp && |
| 3360 btp->nargs == UNEVALLED) | |
| 3361 btp = btp->next; | |
| 3362 | |
| 3363 #else | |
| 3364 | |
| 3365 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3366 btp = btp->next; | |
| 3367 for (; | |
| 3368 btp && (btp->nargs == UNEVALLED | |
| 3369 || EQ (*btp->function, Qbyte_code)); | |
| 3370 btp = btp->next) | |
| 3371 {} | |
| 3372 /* btp now points at the frame of the innermost function | |
| 3373 that DOES eval its args. | |
| 3374 If it is a built-in function (such as load or eval-region) | |
| 3375 return nil. */ | |
| 3376 /* Beats me why this is necessary, but it is */ | |
| 3377 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3378 return Qt; | |
| 3379 | |
| 3380 #endif | |
| 3381 | |
| 3382 fun = Findirect_function (*btp->function); | |
| 3383 if (SUBRP (fun)) | |
| 3384 return Qnil; | |
| 3385 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3386 Return t if that function was called interactively. */ | |
| 3387 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3388 return Qt; | |
| 3389 return Qnil; | |
| 3390 } | |
| 3391 | |
| 3392 | |
| 3393 /************************************************************************/ | |
| 3394 /* Autoloading */ | |
| 3395 /************************************************************************/ | |
| 3396 | |
| 3397 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3398 Define FUNCTION to autoload from FILENAME. |
| 3399 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3400 The remaining optional arguments provide additional info about the | |
| 3401 real definition. | |
| 3402 DOCSTRING is documentation for FUNCTION. | |
| 3403 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3404 TYPE indicates the type of the object: | |
| 428 | 3405 nil or omitted says FUNCTION is a function, |
| 3406 `keymap' says FUNCTION is really a keymap, and | |
| 3407 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3408 If FUNCTION already has a non-void function definition that is not an |
| 3409 autoload object, this function does nothing and returns nil. | |
| 428 | 3410 */ |
| 444 | 3411 (function, filename, docstring, interactive, type)) |
| 428 | 3412 { |
| 3413 /* This function can GC */ | |
| 3414 CHECK_SYMBOL (function); | |
| 444 | 3415 CHECK_STRING (filename); |
| 428 | 3416 |
| 3417 /* If function is defined and not as an autoload, don't override */ | |
| 3418 { | |
| 3419 Lisp_Object f = XSYMBOL (function)->function; | |
| 3420 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3421 return Qnil; | |
| 3422 } | |
| 3423 | |
| 3424 if (purify_flag) | |
| 3425 { | |
| 3426 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3427 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3428 } |
| 440 | 3429 |
| 444 | 3430 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3431 docstring, |
| 3432 interactive, | |
| 3433 type))); | |
| 3434 } | |
| 3435 | |
| 3436 Lisp_Object | |
| 3437 un_autoload (Lisp_Object oldqueue) | |
| 3438 { | |
| 3439 /* This function can GC */ | |
| 3440 REGISTER Lisp_Object queue, first, second; | |
| 3441 | |
| 3442 /* Queue to unwind is current value of Vautoload_queue. | |
| 3443 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3444 queue = Vautoload_queue; | |
| 3445 Vautoload_queue = oldqueue; | |
| 3446 while (CONSP (queue)) | |
| 3447 { | |
| 3448 first = XCAR (queue); | |
| 3449 second = Fcdr (first); | |
| 3450 first = Fcar (first); | |
| 3451 if (NILP (second)) | |
| 3452 Vfeatures = first; | |
| 3453 else | |
| 3454 Ffset (first, second); | |
| 3455 queue = Fcdr (queue); | |
| 3456 } | |
| 3457 return Qnil; | |
| 3458 } | |
| 3459 | |
| 970 | 3460 /* do_autoload GCPROs both arguments */ |
| 428 | 3461 void |
| 3462 do_autoload (Lisp_Object fundef, | |
| 3463 Lisp_Object funname) | |
| 3464 { | |
| 3465 /* This function can GC */ | |
| 3466 int speccount = specpdl_depth(); | |
| 3467 Lisp_Object fun = funname; | |
| 970 | 3468 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3469 |
| 3470 CHECK_SYMBOL (funname); | |
| 970 | 3471 GCPRO3 (fundef, funname, fun); |
| 428 | 3472 |
| 3473 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3474 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3475 Vautoload_queue = Qt; | |
| 3476 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3477 | |
| 3478 { | |
| 3479 Lisp_Object queue; | |
| 3480 | |
| 3481 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3482 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3483 { | |
| 3484 Lisp_Object first = XCAR (queue); | |
| 3485 Lisp_Object second = Fcdr (first); | |
| 3486 | |
| 3487 first = Fcar (first); | |
| 3488 | |
| 3489 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3490 may be an atom if the autoload entry was generated by a defalias | |
| 3491 or fset. */ | |
| 3492 if (CONSP (second)) | |
| 3493 Fput (first, Qautoload, (XCDR (second))); | |
| 3494 } | |
| 3495 } | |
| 3496 | |
| 3497 /* Once loading finishes, don't undo it. */ | |
| 3498 Vautoload_queue = Qt; | |
| 771 | 3499 unbind_to (speccount); |
| 428 | 3500 |
| 3501 fun = indirect_function (fun, 0); | |
| 3502 | |
| 3503 #if 0 /* FSFmacs */ | |
| 3504 if (!NILP (Fequal (fun, fundef))) | |
| 3505 #else | |
| 3506 if (UNBOUNDP (fun) | |
| 3507 || (CONSP (fun) | |
| 3508 && EQ (XCAR (fun), Qautoload))) | |
| 3509 #endif | |
| 563 | 3510 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3511 UNGCPRO; |
| 3512 } | |
| 3513 | |
| 3514 | |
| 3515 /************************************************************************/ | |
| 3516 /* eval, funcall, apply */ | |
| 3517 /************************************************************************/ | |
| 3518 | |
| 814 | 3519 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3520 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3521 -- in particular, the calling of subrs and compiled functions, the most | |
| 3522 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3523 to do to squeeze more speed out except by switching to lexical | |
| 3524 variables, which would eliminate the specbind loop. (But the real gain | |
| 3525 from lexical variables would come from better optimization -- with | |
| 3526 dynamic binding, you have the constant problem that any function call | |
| 3527 that you haven't explicitly proven to be side-effect-free might | |
| 3528 potentially side effect your local variables, which makes optimization | |
| 3529 extremely difficult when there are function calls anywhere in a chunk of | |
| 3530 code to be optimized. Even worse, you don't know that *your* local | |
| 3531 variables aren't side-effecting an outer function's local variables, so | |
| 3532 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3533 | |
| 428 | 3534 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3535 int nargs, Lisp_Object args[]); |
| 428 | 3536 static int in_warnings; |
| 3537 | |
| 3538 | |
| 814 | 3539 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3540 int nargs, | |
| 3541 Lisp_Object args[]); | |
| 3542 | |
| 3543 /* The theory behind making this a separate function is to shrink | |
| 3544 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3545 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3546 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3547 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3548 | |
| 3549 void | |
| 3550 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3551 Lisp_Object args[]) | |
| 3552 { | |
| 3553 REGISTER int i = 0; | |
| 3554 int max_non_rest_args = f->args_in_array - 1; | |
| 3555 int bindargs = min (nargs, max_non_rest_args); | |
| 3556 | |
| 3557 for (i = 0; i < bindargs; i++) | |
| 3092 | 3558 #ifdef NEW_GC |
| 3559 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3560 args[i]); | |
| 3561 #else /* not NEW_GC */ | |
| 814 | 3562 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3563 #endif /* not NEW_GC */ |
| 814 | 3564 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3565 #ifdef NEW_GC |
| 3566 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3567 Qnil); | |
| 3568 #else /* not NEW_GC */ | |
| 814 | 3569 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3570 #endif /* not NEW_GC */ |
| 3571 #ifdef NEW_GC | |
| 3572 SPECBIND_FAST_UNSAFE | |
| 3573 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3574 nargs > max_non_rest_args ? | |
| 3575 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3576 Qnil); | |
| 3577 #else /* not NEW_GC */ | |
| 814 | 3578 SPECBIND_FAST_UNSAFE |
| 3579 (f->args[max_non_rest_args], | |
| 3580 nargs > max_non_rest_args ? | |
| 3581 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3582 Qnil); | |
| 3092 | 3583 #endif /* not NEW_GC */ |
| 814 | 3584 } |
| 3585 | |
| 3586 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3587 in ARGS, and return the result of evaluation. */ | |
| 3588 inline static Lisp_Object | |
| 3589 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3590 { | |
| 3591 /* This function can GC */ | |
| 3592 int speccount = specpdl_depth(); | |
| 3593 REGISTER int i = 0; | |
| 3594 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3595 | |
| 3596 if (!OPAQUEP (f->instructions)) | |
| 3597 /* Lazily munge the instructions into a more efficient form */ | |
| 3598 optimize_compiled_function (fun); | |
| 3599 | |
| 3600 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3601 the required space on the specbinding stack for binding the args | |
| 3602 and local variables of fun. So just reserve it once. */ | |
| 3603 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3604 | |
| 3605 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3606 optional arguments. */ | |
| 3607 { | |
| 3608 #if 1 | |
| 3609 for (i = 0; i < nargs; i++) | |
| 3092 | 3610 #ifdef NEW_GC |
| 3611 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3612 args[i]); | |
| 3613 #else /* not NEW_GC */ | |
| 814 | 3614 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3615 #endif /* not NEW_GC */ |
| 814 | 3616 #else |
| 3617 /* Here's an alternate way to write the loop that tries to further | |
| 3618 optimize funcalls for functions with few arguments by partially | |
| 3619 unrolling the loop. It's not clear whether this is a win since it | |
| 3620 increases the size of the function and the possibility of L1 cache | |
| 3621 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3622 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3623 compiler repeatedly and looking at the total time, show very | |
| 3624 little difference between the simple loop above, the unrolled code | |
| 3625 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3626 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3627 because it's smaller. */ | |
| 3628 switch (nargs) | |
| 3629 { | |
| 3630 default: | |
| 3631 for (i = nargs - 1; i >= 4; i--) | |
| 3632 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3633 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3634 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3635 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3636 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3637 case 0: break; | |
| 3638 } | |
| 3639 #endif | |
| 3640 } | |
| 3641 else if (nargs < f->min_args) | |
| 3642 goto wrong_number_of_arguments; | |
| 3643 else if (nargs < f->max_args) | |
| 3644 { | |
| 3645 for (i = 0; i < nargs; i++) | |
| 3092 | 3646 #ifdef NEW_GC |
| 3647 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3648 args[i]); | |
| 3649 #else /* not NEW_GC */ | |
| 814 | 3650 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3651 #endif /* not NEW_GC */ |
| 814 | 3652 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3653 #ifdef NEW_GC |
| 3654 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3655 Qnil); | |
| 3656 #else /* not NEW_GC */ | |
| 814 | 3657 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3658 #endif /* not NEW_GC */ |
| 814 | 3659 } |
| 3660 else if (f->max_args == MANY) | |
| 3661 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3662 else | |
| 3663 { | |
| 3664 wrong_number_of_arguments: | |
| 3665 /* The actual printed compiled_function object is incomprehensible. | |
| 3666 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3667 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3668 fun = *backtrace_list->function; | |
| 3669 return Fsignal (Qwrong_number_of_arguments, | |
| 3670 list2 (fun, make_int (nargs))); | |
| 3671 } | |
| 3672 | |
| 3673 { | |
| 3674 Lisp_Object value = | |
| 3675 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions), | |
|
4921
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3676 #ifdef ERROR_CHECK_BYTE_CODE |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3677 XOPAQUE_SIZE (f->instructions) / |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3678 sizeof (Opbyte), |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3679 #endif |
| 814 | 3680 f->stack_depth, |
| 3681 XVECTOR_DATA (f->constants)); | |
| 3682 | |
| 3683 /* The attempt to optimize this by only unbinding variables failed | |
| 3684 because using buffer-local variables as function parameters | |
| 3685 leads to specpdl_ptr->func != 0 */ | |
| 3686 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3687 UNBIND_TO_GCPRO (speccount, value); | |
| 3688 return value; | |
| 3689 } | |
| 3690 } | |
| 3691 | |
| 428 | 3692 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3693 Evaluate FORM and return its value. | |
| 3694 */ | |
| 3695 (form)) | |
| 3696 { | |
| 3697 /* This function can GC */ | |
| 3698 Lisp_Object fun, val, original_fun, original_args; | |
| 3699 int nargs; | |
| 4162 | 3700 PROFILE_DECLARE(); |
| 428 | 3701 |
| 1318 | 3702 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3703 check_proper_critical_section_lisp_protection (); | |
| 3704 #endif | |
| 3705 | |
| 3989 | 3706 if (!CONSP (form)) |
| 3707 { | |
| 3708 if (SYMBOLP (form)) | |
| 3709 { | |
| 3710 return Fsymbol_value (form); | |
| 3711 } | |
| 3712 | |
| 3713 return form; | |
| 3714 } | |
| 3715 | |
| 428 | 3716 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3717 while (!in_warnings && !NILP (Vpending_warnings) |
| 3718 /* well, perhaps not so safe after all! */ | |
| 3719 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3720 { |
| 3721 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3722 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3723 int speccount = internal_bind_int (&in_warnings, 1); |
| 3724 | |
| 428 | 3725 this_warning_cons = Vpending_warnings; |
| 3726 this_warning = XCAR (this_warning_cons); | |
| 3727 /* in case an error occurs in the warn function, at least | |
| 3728 it won't happen infinitely */ | |
| 3729 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3730 free_cons (this_warning_cons); |
| 1204 | 3731 class_ = XCAR (this_warning); |
| 428 | 3732 level = XCAR (XCDR (this_warning)); |
| 3733 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3734 free_list (this_warning); | |
| 3735 | |
| 3736 if (NILP (Vpending_warnings)) | |
| 3737 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3738 but safer */ | |
| 3739 | |
| 1204 | 3740 GCPRO4 (form, class_, level, messij); |
| 428 | 3741 if (!STRINGP (messij)) |
| 3742 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3743 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3744 UNGCPRO; |
| 771 | 3745 unbind_to (speccount); |
| 428 | 3746 } |
| 3747 | |
| 3748 QUIT; | |
| 814 | 3749 if (need_to_garbage_collect) |
| 428 | 3750 { |
| 3751 struct gcpro gcpro1; | |
| 3752 GCPRO1 (form); | |
| 3092 | 3753 #ifdef NEW_GC |
| 3754 gc_incremental (); | |
| 3755 #else /* not NEW_GC */ | |
| 428 | 3756 garbage_collect_1 (); |
| 3092 | 3757 #endif /* not NEW_GC */ |
| 428 | 3758 UNGCPRO; |
| 3759 } | |
| 3760 | |
| 3761 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3762 { | |
| 3763 if (max_lisp_eval_depth < 100) | |
| 3764 max_lisp_eval_depth = 100; | |
| 3765 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3766 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3767 Qunbound); | |
| 428 | 3768 } |
| 3769 | |
| 3770 /* We guaranteed CONSP (form) above */ | |
| 3771 original_fun = XCAR (form); | |
| 3772 original_args = XCDR (form); | |
| 3773 | |
| 3774 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3775 | |
| 3776 backtrace.pdlcount = specpdl_depth(); | |
| 3777 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3778 backtrace.args = &original_args; | |
| 3779 backtrace.nargs = UNEVALLED; | |
| 3780 backtrace.evalargs = 1; | |
| 3781 backtrace.debug_on_exit = 0; | |
| 1292 | 3782 backtrace.function_being_called = 0; |
| 428 | 3783 PUSH_BACKTRACE (backtrace); |
| 3784 | |
| 3785 if (debug_on_next_call) | |
| 3786 do_debug_on_call (Qt); | |
| 3787 | |
| 3788 /* At this point, only original_fun and original_args | |
| 3789 have values that will be used below. */ | |
| 3790 retry: | |
| 3989 | 3791 /* Optimise for no indirection. */ |
| 3792 fun = original_fun; | |
| 3793 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3794 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3795 { | |
| 3796 fun = indirect_function(original_fun, 1); | |
| 3797 } | |
| 428 | 3798 |
| 3799 if (SUBRP (fun)) | |
| 3800 { | |
| 3801 Lisp_Subr *subr = XSUBR (fun); | |
| 3802 int max_args = subr->max_args; | |
| 3803 | |
| 3804 if (nargs < subr->min_args) | |
| 3805 goto wrong_number_of_arguments; | |
| 3806 | |
| 3807 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3808 { | |
| 3809 backtrace.evalargs = 0; | |
| 1292 | 3810 PROFILE_ENTER_FUNCTION (); |
| 428 | 3811 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3812 (original_args)); | |
| 1292 | 3813 PROFILE_EXIT_FUNCTION (); |
| 428 | 3814 } |
| 3815 else if (nargs <= max_args) | |
| 3816 { | |
| 3817 struct gcpro gcpro1; | |
| 3818 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3819 REGISTER Lisp_Object *p = args; | |
| 3820 | |
| 3821 GCPRO1 (args[0]); | |
| 3822 gcpro1.nvars = 0; | |
| 3823 | |
| 3824 { | |
| 3825 LIST_LOOP_2 (arg, original_args) | |
| 3826 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3827 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3828 gcpro1.nvars++; |
| 3829 } | |
| 3830 } | |
| 3831 | |
| 3832 /* &optional args default to nil. */ | |
| 3833 while (p - args < max_args) | |
| 3834 *p++ = Qnil; | |
| 3835 | |
| 3836 backtrace.args = args; | |
| 3837 backtrace.nargs = nargs; | |
| 3838 | |
| 1292 | 3839 PROFILE_ENTER_FUNCTION (); |
| 428 | 3840 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3841 PROFILE_EXIT_FUNCTION (); |
| 428 | 3842 |
| 3843 UNGCPRO; | |
| 3844 } | |
| 3845 else if (max_args == MANY) | |
| 3846 { | |
| 3847 /* Pass a vector of evaluated arguments */ | |
| 3848 struct gcpro gcpro1; | |
| 3849 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3850 REGISTER Lisp_Object *p = args; | |
| 3851 | |
| 3852 GCPRO1 (args[0]); | |
| 3853 gcpro1.nvars = 0; | |
| 3854 | |
| 3855 { | |
| 3856 LIST_LOOP_2 (arg, original_args) | |
| 3857 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3858 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3859 gcpro1.nvars++; |
| 3860 } | |
| 3861 } | |
| 3862 | |
| 3863 backtrace.args = args; | |
| 3864 backtrace.nargs = nargs; | |
| 3865 | |
| 1292 | 3866 PROFILE_ENTER_FUNCTION (); |
| 428 | 3867 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3868 (nargs, args)); | |
| 1292 | 3869 PROFILE_EXIT_FUNCTION (); |
| 428 | 3870 |
| 3871 UNGCPRO; | |
| 3872 } | |
| 3873 else | |
| 3874 { | |
| 3875 wrong_number_of_arguments: | |
| 440 | 3876 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3877 } |
| 3878 } | |
| 3879 else if (COMPILED_FUNCTIONP (fun)) | |
| 3880 { | |
| 3881 struct gcpro gcpro1; | |
| 3882 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3883 REGISTER Lisp_Object *p = args; | |
| 3884 | |
| 3885 GCPRO1 (args[0]); | |
| 3886 gcpro1.nvars = 0; | |
| 3887 | |
| 3888 { | |
| 3889 LIST_LOOP_2 (arg, original_args) | |
| 3890 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3891 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3892 gcpro1.nvars++; |
| 3893 } | |
| 3894 } | |
| 3895 | |
| 3896 backtrace.args = args; | |
| 3897 backtrace.nargs = nargs; | |
| 3898 backtrace.evalargs = 0; | |
| 3899 | |
| 1292 | 3900 PROFILE_ENTER_FUNCTION (); |
| 428 | 3901 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3902 PROFILE_EXIT_FUNCTION (); |
| 428 | 3903 |
| 3904 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3905 if (backtrace.debug_on_exit) | |
| 3906 val = do_debug_on_exit (val); | |
| 3907 /* Don't do it again when we return to eval. */ | |
| 3908 backtrace.debug_on_exit = 0; | |
| 3909 | |
| 3910 UNGCPRO; | |
| 3911 } | |
| 3912 else if (CONSP (fun)) | |
| 3913 { | |
| 3914 Lisp_Object funcar = XCAR (fun); | |
| 3915 | |
| 3916 if (EQ (funcar, Qautoload)) | |
| 3917 { | |
| 970 | 3918 /* do_autoload GCPROs both arguments */ |
| 428 | 3919 do_autoload (fun, original_fun); |
| 3920 goto retry; | |
| 3921 } | |
| 3922 else if (EQ (funcar, Qmacro)) | |
| 3923 { | |
| 1292 | 3924 PROFILE_ENTER_FUNCTION (); |
| 428 | 3925 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3926 PROFILE_EXIT_FUNCTION (); |
| 428 | 3927 } |
| 3928 else if (EQ (funcar, Qlambda)) | |
| 3929 { | |
| 3930 struct gcpro gcpro1; | |
| 3931 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3932 REGISTER Lisp_Object *p = args; | |
| 3933 | |
| 3934 GCPRO1 (args[0]); | |
| 3935 gcpro1.nvars = 0; | |
| 3936 | |
| 3937 { | |
| 3938 LIST_LOOP_2 (arg, original_args) | |
| 3939 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3940 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3941 gcpro1.nvars++; |
| 3942 } | |
| 3943 } | |
| 3944 | |
| 3945 UNGCPRO; | |
| 3946 | |
| 3947 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3948 backtrace.nargs = nargs; | |
| 3949 backtrace.evalargs = 0; | |
| 3950 | |
| 1292 | 3951 PROFILE_ENTER_FUNCTION (); |
| 428 | 3952 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3953 PROFILE_EXIT_FUNCTION (); |
| 428 | 3954 |
| 3955 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3956 if (backtrace.debug_on_exit) | |
| 3957 val = do_debug_on_exit (val); | |
| 3958 /* Don't do it again when we return to eval. */ | |
| 3959 backtrace.debug_on_exit = 0; | |
| 3960 } | |
| 3961 else | |
| 3962 { | |
| 3963 goto invalid_function; | |
| 3964 } | |
| 3965 } | |
| 4104 | 3966 else if (UNBOUNDP (fun)) |
| 3967 { | |
| 3968 val = signal_void_function_error (original_fun); | |
| 3969 } | |
| 3970 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3971 UNBOUNDP (fun)) */ | |
| 428 | 3972 { |
| 3973 invalid_function: | |
| 436 | 3974 val = signal_invalid_function_error (fun); |
| 428 | 3975 } |
| 3976 | |
| 3977 lisp_eval_depth--; | |
| 3978 if (backtrace.debug_on_exit) | |
| 3979 val = do_debug_on_exit (val); | |
| 3980 POP_BACKTRACE (backtrace); | |
| 3981 return val; | |
| 3982 } | |
| 3983 | |
| 3984 | |
| 1111 | 3985 |
| 3986 static void | |
| 3987 run_post_gc_hook (void) | |
| 3988 { | |
| 3989 Lisp_Object args[2]; | |
| 3990 | |
| 3991 args[0] = Qpost_gc_hook; | |
| 3992 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 3993 | |
| 3994 run_hook_with_args_trapping_problems | |
| 1333 | 3995 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 3996 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 3997 } | |
| 3998 | |
| 428 | 3999 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /* |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4000 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 4001 Thus, (funcall 'cons 'x 'y) returns (x . y). |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4002 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4003 arguments: (FUNCTION &rest ARGS) |
| 428 | 4004 */ |
| 4005 (int nargs, Lisp_Object *args)) | |
| 4006 { | |
| 4007 /* This function can GC */ | |
| 4008 Lisp_Object fun; | |
| 4009 Lisp_Object val; | |
| 4162 | 4010 PROFILE_DECLARE(); |
| 428 | 4011 int fun_nargs = nargs - 1; |
| 4012 Lisp_Object *fun_args = args + 1; | |
| 4013 | |
| 1318 | 4014 /* QUIT will check for proper redisplay wrapping */ |
| 4015 | |
| 428 | 4016 QUIT; |
| 851 | 4017 |
| 4018 if (funcall_allocation_flag) | |
| 4019 { | |
| 4020 if (need_to_garbage_collect) | |
| 4021 /* Callers should gcpro lexpr args */ | |
| 3092 | 4022 #ifdef NEW_GC |
| 4023 gc_incremental (); | |
| 4024 #else /* not NEW_GC */ | |
| 851 | 4025 garbage_collect_1 (); |
| 3092 | 4026 #endif /* not NEW_GC */ |
| 851 | 4027 if (need_to_check_c_alloca) |
| 4028 { | |
| 4029 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 4030 { | |
| 4031 xemacs_c_alloca (0); | |
| 4032 funcall_alloca_count = 0; | |
| 4033 } | |
| 4034 } | |
| 887 | 4035 if (need_to_signal_post_gc) |
| 4036 { | |
| 4037 need_to_signal_post_gc = 0; | |
| 1111 | 4038 recompute_funcall_allocation_flag (); |
| 3263 | 4039 #ifdef NEW_GC |
| 4040 run_finalizers (); | |
| 4041 #endif /* NEW_GC */ | |
| 1111 | 4042 run_post_gc_hook (); |
| 887 | 4043 } |
| 851 | 4044 } |
| 428 | 4045 |
| 4046 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 4047 { | |
| 4048 if (max_lisp_eval_depth < 100) | |
| 4049 max_lisp_eval_depth = 100; | |
| 4050 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 4051 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 4052 Qunbound); | |
| 428 | 4053 } |
| 4054 | |
| 1292 | 4055 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4056 backtrace.function = &args[0]; |
| 4057 backtrace.args = fun_args; | |
| 4058 backtrace.nargs = fun_nargs; | |
| 4059 backtrace.evalargs = 0; | |
| 4060 backtrace.debug_on_exit = 0; | |
| 1292 | 4061 backtrace.function_being_called = 0; |
| 428 | 4062 PUSH_BACKTRACE (backtrace); |
| 4063 | |
| 4064 if (debug_on_next_call) | |
| 4065 do_debug_on_call (Qlambda); | |
| 4066 | |
| 4067 retry: | |
| 4068 | |
| 4069 fun = args[0]; | |
| 4070 | |
| 4071 /* We could call indirect_function directly, but profiling shows | |
| 4072 this is worth optimizing by partially unrolling the loop. */ | |
| 4073 if (SYMBOLP (fun)) | |
| 4074 { | |
| 4075 fun = XSYMBOL (fun)->function; | |
| 4076 if (SYMBOLP (fun)) | |
| 4077 { | |
| 4078 fun = XSYMBOL (fun)->function; | |
| 4079 if (SYMBOLP (fun)) | |
| 4080 fun = indirect_function (fun, 1); | |
| 4081 } | |
| 4082 } | |
| 4083 | |
| 4084 if (SUBRP (fun)) | |
| 4085 { | |
| 4086 Lisp_Subr *subr = XSUBR (fun); | |
| 4087 int max_args = subr->max_args; | |
| 4088 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4089 | |
| 4090 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4091 { | |
| 4092 funcall_subr: | |
| 1292 | 4093 PROFILE_ENTER_FUNCTION (); |
| 428 | 4094 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4095 PROFILE_EXIT_FUNCTION (); |
| 428 | 4096 } |
| 436 | 4097 else if (fun_nargs < subr->min_args) |
| 4098 { | |
| 4099 goto wrong_number_of_arguments; | |
| 4100 } | |
| 428 | 4101 else if (fun_nargs < max_args) |
| 4102 { | |
| 4103 Lisp_Object *p = spacious_args; | |
| 4104 | |
| 4105 /* Default optionals to nil */ | |
| 4106 while (fun_nargs--) | |
| 4107 *p++ = *fun_args++; | |
| 4108 while (p - spacious_args < max_args) | |
| 4109 *p++ = Qnil; | |
| 4110 | |
| 4111 fun_args = spacious_args; | |
| 4112 goto funcall_subr; | |
| 4113 } | |
| 4114 else if (max_args == MANY) | |
| 4115 { | |
| 1292 | 4116 PROFILE_ENTER_FUNCTION (); |
| 436 | 4117 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4118 PROFILE_EXIT_FUNCTION (); |
| 428 | 4119 } |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4120 else if (max_args == UNEVALLED) /* Can't funcall a special operator */ |
| 428 | 4121 { |
|
5222
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4122 |
|
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4123 #ifdef NEED_TO_HANDLE_21_4_CODE |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4124 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4125 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4126 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4127 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4128 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4129 } |
|
5222
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4130 #endif /* NEED_TO_HANDLE_21_4_CODE */ |
|
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4131 |
| 428 | 4132 goto invalid_function; |
| 4133 } | |
| 4134 else | |
| 4135 { | |
| 4136 wrong_number_of_arguments: | |
| 436 | 4137 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4138 } |
| 4139 } | |
| 4140 else if (COMPILED_FUNCTIONP (fun)) | |
| 4141 { | |
| 1292 | 4142 PROFILE_ENTER_FUNCTION (); |
| 428 | 4143 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4144 PROFILE_EXIT_FUNCTION (); |
| 428 | 4145 } |
| 4146 else if (CONSP (fun)) | |
| 4147 { | |
| 4148 Lisp_Object funcar = XCAR (fun); | |
| 4149 | |
| 4150 if (EQ (funcar, Qlambda)) | |
| 4151 { | |
| 1292 | 4152 PROFILE_ENTER_FUNCTION (); |
| 428 | 4153 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4154 PROFILE_EXIT_FUNCTION (); |
| 428 | 4155 } |
| 4156 else if (EQ (funcar, Qautoload)) | |
| 4157 { | |
| 970 | 4158 /* do_autoload GCPROs both arguments */ |
| 428 | 4159 do_autoload (fun, args[0]); |
| 4160 goto retry; | |
| 4161 } | |
| 4162 else /* Can't funcall a macro */ | |
| 4163 { | |
| 4164 goto invalid_function; | |
| 4165 } | |
| 4166 } | |
| 4167 else if (UNBOUNDP (fun)) | |
| 4168 { | |
| 436 | 4169 val = signal_void_function_error (args[0]); |
| 428 | 4170 } |
| 4171 else | |
| 4172 { | |
| 4173 invalid_function: | |
| 436 | 4174 val = signal_invalid_function_error (fun); |
| 428 | 4175 } |
| 4176 | |
| 4177 lisp_eval_depth--; | |
| 4178 if (backtrace.debug_on_exit) | |
| 4179 val = do_debug_on_exit (val); | |
| 4180 POP_BACKTRACE (backtrace); | |
| 4181 return val; | |
| 4182 } | |
| 4183 | |
| 4184 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4185 Return t if OBJECT can be called as a function, else nil. | |
| 4186 A function is an object that can be applied to arguments, | |
| 4187 using for example `funcall' or `apply'. | |
| 4188 */ | |
| 4189 (object)) | |
| 4190 { | |
| 4191 if (SYMBOLP (object)) | |
| 4192 object = indirect_function (object, 0); | |
| 4193 | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4194 if (COMPILED_FUNCTIONP (object) |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4195 || (SUBRP (object) |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4196 && (XSUBR (object)->max_args != UNEVALLED))) |
| 919 | 4197 return Qt; |
| 4198 if (CONSP (object)) | |
| 4199 { | |
| 4200 Lisp_Object car = XCAR (object); | |
| 4201 if (EQ (car, Qlambda)) | |
| 4202 return Qt; | |
| 4203 if (EQ (car, Qautoload) | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4204 && NILP (Fcar_safe (Fcdr_safe(Fcdr_safe |
|
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4205 (Fcdr_safe (XCDR (object))))))) |
| 919 | 4206 return Qt; |
| 4207 } | |
| 4208 return Qnil; | |
| 428 | 4209 } |
| 4210 | |
| 4211 static Lisp_Object | |
| 4212 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4213 { | |
| 4214 Lisp_Object orig_function = function; | |
| 4215 Lisp_Object arglist; | |
| 4216 | |
| 4217 retry: | |
| 4218 | |
| 4219 if (SYMBOLP (function)) | |
| 4220 function = indirect_function (function, 1); | |
| 4221 | |
| 4222 if (SUBRP (function)) | |
| 4223 { | |
| 442 | 4224 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4225 if (function_min_args_p) | |
| 4226 return Fsubr_min_args (function); | |
| 4227 else | |
| 4228 return Fsubr_max_args (function); | |
| 428 | 4229 } |
| 4230 else if (COMPILED_FUNCTIONP (function)) | |
| 4231 { | |
| 814 | 4232 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4233 | |
| 1737 | 4234 if (!OPAQUEP (f->instructions)) |
| 4235 /* Lazily munge the instructions into a more efficient form */ | |
| 4236 /* Needed to set max_args */ | |
| 4237 optimize_compiled_function (function); | |
| 4238 | |
| 814 | 4239 if (function_min_args_p) |
| 4240 return make_int (f->min_args); | |
| 4241 else if (f->max_args == MANY) | |
| 4242 return Qnil; | |
| 4243 else | |
| 4244 return make_int (f->max_args); | |
| 428 | 4245 } |
| 4246 else if (CONSP (function)) | |
| 4247 { | |
| 4248 Lisp_Object funcar = XCAR (function); | |
| 4249 | |
| 4250 if (EQ (funcar, Qmacro)) | |
| 4251 { | |
| 4252 function = XCDR (function); | |
| 4253 goto retry; | |
| 4254 } | |
| 4255 else if (EQ (funcar, Qautoload)) | |
| 4256 { | |
| 970 | 4257 /* do_autoload GCPROs both arguments */ |
| 428 | 4258 do_autoload (function, orig_function); |
| 442 | 4259 function = orig_function; |
| 428 | 4260 goto retry; |
| 4261 } | |
| 4262 else if (EQ (funcar, Qlambda)) | |
| 4263 { | |
| 4264 arglist = Fcar (XCDR (function)); | |
| 4265 } | |
| 4266 else | |
| 4267 { | |
| 4268 goto invalid_function; | |
| 4269 } | |
| 4270 } | |
| 4271 else | |
| 4272 { | |
| 4273 invalid_function: | |
| 442 | 4274 return signal_invalid_function_error (orig_function); |
| 428 | 4275 } |
| 4276 | |
| 4277 { | |
| 4278 int argcount = 0; | |
| 4279 | |
| 4280 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4281 { | |
| 4282 if (EQ (arg, Qand_optional)) | |
| 4283 { | |
| 4284 if (function_min_args_p) | |
| 4285 break; | |
| 4286 } | |
| 4287 else if (EQ (arg, Qand_rest)) | |
| 4288 { | |
| 4289 if (function_min_args_p) | |
| 4290 break; | |
| 4291 else | |
| 4292 return Qnil; | |
| 4293 } | |
| 4294 else | |
| 4295 { | |
| 4296 argcount++; | |
| 4297 } | |
| 4298 } | |
| 4299 | |
| 4300 return make_int (argcount); | |
| 4301 } | |
| 4302 } | |
| 4303 | |
| 4304 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4305 Return the minimum number of arguments a function may be called with. |
| 428 | 4306 The function may be any form that can be passed to `funcall', |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4307 any special operator, or any macro. |
| 853 | 4308 |
| 4309 To check if a function can be called with a specified number of | |
| 4310 arguments, use `function-allows-args'. | |
| 428 | 4311 */ |
| 4312 (function)) | |
| 4313 { | |
| 4314 return function_argcount (function, 1); | |
| 4315 } | |
| 4316 | |
| 4317 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4318 Return the maximum number of arguments a function may be called with. |
| 428 | 4319 The function may be any form that can be passed to `funcall', |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4320 any special operator, or any macro. |
| 428 | 4321 If the function takes an arbitrary number of arguments or is |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4322 a built-in special operator, nil is returned. |
| 853 | 4323 |
| 4324 To check if a function can be called with a specified number of | |
| 4325 arguments, use `function-allows-args'. | |
| 428 | 4326 */ |
| 4327 (function)) | |
| 4328 { | |
| 4329 return function_argcount (function, 0); | |
| 4330 } | |
| 4331 | |
| 4332 | |
| 4333 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4334 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4335 Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4336 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4337 arguments: (FUNCTION &rest ARGS) |
| 428 | 4338 */ |
| 4339 (int nargs, Lisp_Object *args)) | |
| 4340 { | |
| 4341 /* This function can GC */ | |
| 4342 Lisp_Object fun = args[0]; | |
| 4343 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4344 int numargs; | |
| 4345 int funcall_nargs; | |
| 4346 | |
| 4347 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4348 | |
| 4349 if (numargs == 0) | |
| 4350 /* (apply foo 0 1 '()) */ | |
| 4351 return Ffuncall (nargs - 1, args); | |
| 4352 else if (numargs == 1) | |
| 4353 { | |
| 4354 /* (apply foo 0 1 '(2)) */ | |
| 4355 args [nargs - 1] = XCAR (spread_arg); | |
| 4356 return Ffuncall (nargs, args); | |
| 4357 } | |
| 4358 | |
| 4359 /* -1 for function, -1 for spread arg */ | |
| 4360 numargs = nargs - 2 + numargs; | |
| 4361 /* +1 for function */ | |
| 4362 funcall_nargs = 1 + numargs; | |
| 4363 | |
| 4364 if (SYMBOLP (fun)) | |
| 4365 fun = indirect_function (fun, 0); | |
| 4366 | |
| 4367 if (SUBRP (fun)) | |
| 4368 { | |
| 4369 Lisp_Subr *subr = XSUBR (fun); | |
| 4370 int max_args = subr->max_args; | |
| 4371 | |
| 4372 if (numargs < subr->min_args | |
| 4373 || (max_args >= 0 && max_args < numargs)) | |
| 4374 { | |
| 4375 /* Let funcall get the error */ | |
| 4376 } | |
| 4377 else if (max_args > numargs) | |
| 4378 { | |
| 4379 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4380 by explicitly supplying nil's for optional values */ | |
| 4381 funcall_nargs += (max_args - numargs); | |
| 4382 } | |
| 4383 } | |
| 4384 else if (UNBOUNDP (fun)) | |
| 4385 { | |
| 4386 /* Let funcall get the error */ | |
| 4387 fun = args[0]; | |
| 4388 } | |
| 4389 | |
| 4390 { | |
| 4391 REGISTER int i; | |
| 4392 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4393 struct gcpro gcpro1; | |
| 4394 | |
| 4395 GCPRO1 (*funcall_args); | |
| 4396 gcpro1.nvars = funcall_nargs; | |
| 4397 | |
| 4398 /* Copy in the unspread args */ | |
| 4399 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4400 /* Spread the last arg we got. Its first element goes in | |
| 4401 the slot that it used to occupy, hence this value of I. */ | |
| 4402 for (i = nargs - 1; | |
| 4403 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4404 i++, spread_arg = XCDR (spread_arg)) | |
| 4405 { | |
| 4406 funcall_args [i] = XCAR (spread_arg); | |
| 4407 } | |
| 4408 /* Supply nil for optional args (to subrs) */ | |
| 4409 for (; i < funcall_nargs; i++) | |
| 4410 funcall_args[i] = Qnil; | |
| 4411 | |
| 4412 | |
| 4413 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4414 } | |
| 4415 } | |
| 4416 | |
| 4417 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4418 return the result of evaluation. */ | |
| 4419 | |
| 4420 static Lisp_Object | |
| 4421 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4422 { | |
| 4423 /* This function can GC */ | |
| 442 | 4424 Lisp_Object arglist, body, tail; |
| 428 | 4425 int speccount = specpdl_depth(); |
| 4426 REGISTER int i = 0; | |
| 4427 | |
| 4428 tail = XCDR (fun); | |
| 4429 | |
| 4430 if (!CONSP (tail)) | |
| 4431 goto invalid_function; | |
| 4432 | |
| 4433 arglist = XCAR (tail); | |
| 4434 body = XCDR (tail); | |
| 4435 | |
| 4436 { | |
| 4437 int optional = 0, rest = 0; | |
| 4438 | |
| 442 | 4439 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4440 { |
| 4441 if (!SYMBOLP (symbol)) | |
| 4442 goto invalid_function; | |
| 4443 if (EQ (symbol, Qand_rest)) | |
| 4444 rest = 1; | |
| 4445 else if (EQ (symbol, Qand_optional)) | |
| 4446 optional = 1; | |
| 4447 else if (rest) | |
| 4448 { | |
| 4449 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4450 i = nargs; | |
| 4451 } | |
| 4452 else if (i < nargs) | |
| 4453 specbind (symbol, args[i++]); | |
| 4454 else if (!optional) | |
| 4455 goto wrong_number_of_arguments; | |
| 4456 else | |
| 4457 specbind (symbol, Qnil); | |
| 4458 } | |
| 4459 } | |
| 4460 | |
| 4461 if (i < nargs) | |
| 4462 goto wrong_number_of_arguments; | |
| 4463 | |
| 771 | 4464 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4465 |
| 4466 wrong_number_of_arguments: | |
| 436 | 4467 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4468 |
| 4469 invalid_function: | |
| 436 | 4470 return signal_invalid_function_error (fun); |
| 428 | 4471 } |
| 4472 | |
| 4473 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4474 /* Multiple values. |
|
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 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
|
4477 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4478 -- The number of arguments to #'values is not one, and: |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4479 -- Some special operator in the call stack is prepared to handle more than |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4480 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4481 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4482 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
|
4483 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4484 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
|
4485 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
|
4486 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
|
4487 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
|
4488 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
|
4489 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
|
4490 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
|
4491 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
|
4492 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4493 The specific multiple values saved and returned depend on how many |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4494 multiple-values special operators in the stack are interested in; for |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4495 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
|
4496 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
|
4497 #'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
|
4498 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
|
4499 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4500 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4501 (#'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
|
4502 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
|
4503 #'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
|
4504 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
|
4505 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
|
4506 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4507 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
|
4508 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
|
4509 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
|
4510 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
|
4511 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4512 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
|
4513 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
|
4514 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
|
4515 on being printed from within GDB. |
|
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 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
|
4518 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
|
4519 #'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
|
4520 #'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
|
4521 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
|
4522 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
|
4523 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
|
4524 *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
|
4525 not have this penalty. |
|
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 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
|
4528 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4529 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4530 "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
|
4531 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
|
4532 used." |
|
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 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
|
4535 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
|
4536 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
|
4537 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
|
4538 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4539 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4540 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
|
4541 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4542 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4543 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4544 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 Elemcount i, allocated_count; |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4546 Lisp_Object mvobj; |
|
4677
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 assert (count != 1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4549 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4550 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
|
4551 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4552 /* 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
|
4553 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4554 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4555 } |
|
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 if (first_desired >= count) |
|
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 /* 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
|
4560 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4561 allocated_count = 1; |
|
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 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4564 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4565 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
|
4566 - first_desired); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4567 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4568 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4569 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
|
4570 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4571 contents, allocated_count); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4572 mvobj = ALLOC_SIZED_LISP_OBJECT (sizem, multiple_value); |
|
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4573 mv = XMULTIPLE_VALUE (mvobj); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4574 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4575 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4576 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4577 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4578 mv->contents[0] = first_value; |
|
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 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
|
4581 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 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
|
4583 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4584 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4585 return mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4586 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 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
|
4590 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4591 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
|
4592 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4593 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4594 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4595 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4596 (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
|
4597 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4598 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
|
4599 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 } |
|
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 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
|
4603 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4606 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
|
4607 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4608 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
|
4609 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4610 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4611 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4612 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4613 (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
|
4614 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4615 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
|
4616 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4617 } |
|
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 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
|
4620 } |
|
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 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4623 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
|
4624 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4625 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
|
4626 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4628 Elemcount count = mv->count, index; |
|
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 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4631 { |
|
5146
88bd4f3ef8e4
make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
Ben Wing <ben@xemacs.org>
parents:
5142
diff
changeset
|
4632 printing_unreadable_object_fmt ("#<multiple values 0x%x>", |
|
88bd4f3ef8e4
make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
Ben Wing <ben@xemacs.org>
parents:
5142
diff
changeset
|
4633 LISP_OBJECT_UID (obj)); |
|
4677
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 |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4636 write_fmt_string (printcharfun, |
|
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4637 "#<INTERNAL OBJECT (XEmacs bug?) %d multiple values," |
|
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4638 " data (", count); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 for (index = 0; index < count;) |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4643 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4644 index >= (first_desired + (allocated_count - 1)))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4645 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 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
|
4647 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4648 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4649 else |
|
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 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
|
4652 printcharfun, escapeflag); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4655 ++index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4656 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4657 if (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4658 { |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4659 write_ascstring (printcharfun, " "); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4660 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4661 } |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4662 |
|
5146
88bd4f3ef8e4
make lrecord UID's have a separate UID space for each object, resurrect debug SOE code in extents.c
Ben Wing <ben@xemacs.org>
parents:
5142
diff
changeset
|
4663 write_fmt_string (printcharfun, ") 0x%x>", LISP_OBJECT_UID (obj)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4664 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4665 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4666 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4668 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 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
|
4670 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
|
4671 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4672 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
|
4673 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4674 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4675 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4676 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4677 return Qnil; |
|
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 static Bytecount |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4681 size_multiple_value (Lisp_Object obj) |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4682 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4683 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
|
4684 Lisp_Object, contents, |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4685 XMULTIPLE_VALUE (obj)->allocated_count); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4686 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4687 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4688 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
|
4689 { 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
|
4690 { 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
|
4691 { 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
|
4692 { 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
|
4693 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4694 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4695 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4696 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4697 DEFINE_DUMPABLE_SIZABLE_LISP_OBJECT ("multiple-value", multiple_value, |
|
5124
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4698 mark_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4699 print_multiple_value, 0, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4700 0, /* No equal method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4701 0, /* No hash method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4702 multiple_value_description, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4703 size_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4704 struct multiple_value); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4705 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4706 /* 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
|
4707 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
|
4708 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
|
4709 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
|
4710 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4711 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
|
4712 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4713 int result = specpdl_depth(); |
|
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 if (!(upper > first)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4716 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4717 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
|
4718 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4719 } |
|
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 if (upper > Vmultiple_values_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4722 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4723 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
|
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 /* 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
|
4727 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
|
4728 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
|
4729 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
|
4730 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4731 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
|
4732 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
|
4733 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4734 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
|
4735 if (0 == first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4736 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4737 first = 1; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4740 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4741 || first < first_desired_multiple_value) |
|
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 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
|
4744 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4745 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4746 if (upper > multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4747 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4748 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
|
4749 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4750 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4753 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4754 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4755 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
|
4756 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4757 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4758 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4759 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
|
4760 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4761 Lisp_Object apply_args[2]; |
|
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 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4764 list_offset = 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 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4767 CHECK_FUNCTION (args[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4768 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4769 /* 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
|
4770 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
|
4771 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4772 for (i = 4; i < nargs; ++i) |
|
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 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4775 if (MULTIPLE_VALUEP (result)) |
|
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 Lisp_Object val; |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4778 Elemcount j, count = XMULTIPLE_VALUE_COUNT (result); |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4779 |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4780 for (j = 0; j < count; j++) |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 { |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4782 val = multiple_value_aref (result, j); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4785 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4786 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4787 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4788 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4789 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4790 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4791 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4792 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4793 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4794 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4796 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4797 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4798 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 unbind_to (speccount); |
|
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 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
|
4802 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4803 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4804 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
|
4805 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
|
4806 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4807 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
|
4808 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
|
4809 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
|
4810 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
|
4811 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4812 arguments: (FUNCTION &rest FORMS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4814 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4816 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4817 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4818 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4819 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4820 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4821 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4822 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
|
4823 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4824 /* 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
|
4825 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
|
4826 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4827 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4832 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4833 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
|
4834 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4835 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 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
|
4837 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4838 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4840 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4841 LIST_LOOP_2 (elt, XCDR (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 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4844 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4845 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4846 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4847 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4848 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
|
4849 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4852 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
|
4853 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 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
|
4855 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4856 Lisp_Object result = Qnil; |
|
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 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4859 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4860 result = args[3]; |
|
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 unbind_to (speccount); |
|
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 if (MULTIPLE_VALUEP (result)) |
|
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 head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4867 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4868 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4869 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4870 for (; first < upper && first < count; ++first) |
|
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 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 assert (!UNBOUNDP (val)); |
|
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 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4878 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4879 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4880 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4881 else |
|
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 if (first == 0) |
|
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 return Fcons (result, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4886 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4887 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4888 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4889 return Qnil; |
|
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 } |
|
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 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
|
4895 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4896 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
|
4897 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4898 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
|
4899 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4901 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
|
4902 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
|
4903 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
|
4904 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
|
4905 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
|
4906 `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
|
4907 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4908 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
|
4909 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4910 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4911 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4912 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4913 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4914 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4915 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4916 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4917 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4918 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4919 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4920 list2 (Qmultiple_value_list_internal, make_int (nargs))); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4921 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4922 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 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
|
4924 CHECK_NATNUM (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4925 first = XINT (argv[0]); |
|
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 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4928 gcpro1.nvars = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4929 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4930 args = XCDR (args); |
|
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 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
|
4933 CHECK_NATNUM (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 upper = XINT (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4935 gcpro1.nvars = 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 /* 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
|
4938 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
|
4939 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
|
4940 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4941 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
|
4942 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4943 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4944 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4945 /* 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
|
4946 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
|
4947 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
|
4948 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
|
4949 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
|
4950 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4951 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 gcpro1.nvars = 4; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4953 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4954 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
|
4955 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4956 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4957 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
|
4958 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
|
4959 `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
|
4960 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4961 arguments: (FIRST &rest BODY) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4962 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4964 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4965 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4966 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4967 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4968 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4969 val = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4970 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4971 GCPRO1 (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4973 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4974 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4976 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4977 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4978 RETURN_UNGCPRO (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4979 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4980 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4981 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4982 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4983 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4984 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4986 (int nargs, Lisp_Object *args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4987 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4988 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4989 int counting = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4990 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4991 /* 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
|
4992 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
|
4993 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4995 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4996 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4997 /* 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
|
4998 #'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
|
4999 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
|
5000 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5001 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
|
5002 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5003 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5004 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5005 for (; counting < nargs; ++counting) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5006 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5007 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5008 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5009 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5010 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
|
5011 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5012 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5013 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5014 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5015 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5016 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5017 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
|
5018 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
|
5019 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5020 (list)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5021 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5022 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5023 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5024 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5025 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5026 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5027 /* 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
|
5028 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
|
5029 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5030 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5031 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5032 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5033 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
|
5034 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5035 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5036 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5037 list = Fcdr_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5038 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5039 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5040 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5041 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5042 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5043 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5044 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5045 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5046 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5047 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5048 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5049 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5050 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5051 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5052 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5053 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5054 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5055 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
|
5056 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5057 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5058 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5059 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5060 argv[1] = second; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5061 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5062 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5063 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5064 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5065 |
| 428 | 5066 /************************************************************************/ |
| 5067 /* Run hook variables in various ways. */ | |
| 5068 /************************************************************************/ | |
| 5069 | |
| 5070 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5071 Run each hook in HOOKS. Major mode functions use this. | |
| 5072 Each argument should be a symbol, a hook variable. | |
| 5073 These symbols are processed in the order specified. | |
| 5074 If a hook symbol has a non-nil value, that value may be a function | |
| 5075 or a list of functions to be called to run the hook. | |
| 5076 If the value is a function, it is called with no arguments. | |
| 5077 If it is a list, the elements are called, in order, with no arguments. | |
| 5078 | |
| 5079 To make a hook variable buffer-local, use `make-local-hook', | |
| 5080 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5081 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5082 arguments: (FIRST &rest REST) |
| 428 | 5083 */ |
| 5084 (int nargs, Lisp_Object *args)) | |
| 5085 { | |
| 5086 REGISTER int i; | |
| 5087 | |
| 5088 for (i = 0; i < nargs; i++) | |
| 5089 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5090 | |
| 5091 return Qnil; | |
| 5092 } | |
| 5093 | |
| 5094 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5095 Run HOOK with the specified arguments ARGS. | |
| 5096 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5097 value, that value may be a function or a list of functions to be | |
| 5098 called to run the hook. If the value is a function, it is called with | |
| 5099 the given arguments and its return value is returned. If it is a list | |
| 5100 of functions, those functions are called, in order, | |
| 5101 with the given arguments ARGS. | |
| 444 | 5102 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5103 as that may change. |
| 5104 | |
| 5105 To make a hook variable buffer-local, use `make-local-hook', | |
| 5106 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5107 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5108 arguments: (HOOK &rest ARGS) |
| 428 | 5109 */ |
| 5110 (int nargs, Lisp_Object *args)) | |
| 5111 { | |
| 5112 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5113 } | |
| 5114 | |
| 5115 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5116 Run HOOK with the specified arguments ARGS. | |
| 5117 HOOK should be a symbol, a hook variable. Its value should | |
| 5118 be a list of functions. We call those functions, one by one, | |
| 5119 passing arguments ARGS to each of them, until one of them | |
| 5120 returns a non-nil value. Then we return that value. | |
| 5121 If all the functions return nil, we return nil. | |
| 5122 | |
| 5123 To make a hook variable buffer-local, use `make-local-hook', | |
| 5124 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5125 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5126 arguments: (HOOK &rest ARGS) |
| 428 | 5127 */ |
| 5128 (int nargs, Lisp_Object *args)) | |
| 5129 { | |
| 5130 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5131 } | |
| 5132 | |
| 5133 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5134 Run HOOK with the specified arguments ARGS. | |
| 5135 HOOK should be a symbol, a hook variable. Its value should | |
| 5136 be a list of functions. We call those functions, one by one, | |
| 5137 passing arguments ARGS to each of them, until one of them | |
| 5138 returns nil. Then we return nil. | |
| 5139 If all the functions return non-nil, we return non-nil. | |
| 5140 | |
| 5141 To make a hook variable buffer-local, use `make-local-hook', | |
| 5142 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5143 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5144 arguments: (HOOK &rest ARGS) |
| 428 | 5145 */ |
| 5146 (int nargs, Lisp_Object *args)) | |
| 5147 { | |
| 5148 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5149 } | |
| 5150 | |
| 5151 /* ARGS[0] should be a hook symbol. | |
| 5152 Call each of the functions in the hook value, passing each of them | |
| 5153 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5154 COND specifies a condition to test after each call | |
| 5155 to decide whether to stop. | |
| 5156 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5157 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5158 | |
| 5159 Lisp_Object | |
| 5160 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5161 enum run_hooks_condition cond) | |
| 5162 { | |
| 5163 Lisp_Object sym, val, ret; | |
| 5164 | |
| 5165 if (!initialized || preparing_for_armageddon) | |
| 5166 /* We need to bail out of here pronto. */ | |
| 5167 return Qnil; | |
| 5168 | |
| 3092 | 5169 #ifndef NEW_GC |
| 428 | 5170 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5171 will also be true unless something is really hosed. */ | |
| 5172 assert (!gc_in_progress); | |
| 3092 | 5173 #endif /* not NEW_GC */ |
| 428 | 5174 |
| 5175 sym = args[0]; | |
| 771 | 5176 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5177 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5178 | |
| 5179 if (UNBOUNDP (val) || NILP (val)) | |
| 5180 return ret; | |
| 5181 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5182 { | |
| 5183 args[0] = val; | |
| 5184 return Ffuncall (nargs, args); | |
| 5185 } | |
| 5186 else | |
| 5187 { | |
| 5188 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5189 Lisp_Object globals = Qnil; | |
| 5190 GCPRO3 (sym, val, globals); | |
| 5191 | |
| 5192 for (; | |
| 5193 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5194 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5195 : !NILP (ret))); | |
| 5196 val = XCDR (val)) | |
| 5197 { | |
| 5198 if (EQ (XCAR (val), Qt)) | |
| 5199 { | |
| 5200 /* t indicates this hook has a local binding; | |
| 5201 it means to run the global binding too. */ | |
| 5202 globals = Fdefault_value (sym); | |
| 5203 | |
| 5204 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5205 ! NILP (globals)) | |
| 5206 { | |
| 5207 args[0] = globals; | |
| 5208 ret = Ffuncall (nargs, args); | |
| 5209 } | |
| 5210 else | |
| 5211 { | |
| 5212 for (; | |
| 5213 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5214 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5215 ? NILP (ret) | |
| 5216 : !NILP (ret))); | |
| 5217 globals = XCDR (globals)) | |
| 5218 { | |
| 5219 args[0] = XCAR (globals); | |
| 5220 /* In a global value, t should not occur. If it does, we | |
| 5221 must ignore it to avoid an endless loop. */ | |
| 5222 if (!EQ (args[0], Qt)) | |
| 5223 ret = Ffuncall (nargs, args); | |
| 5224 } | |
| 5225 } | |
| 5226 } | |
| 5227 else | |
| 5228 { | |
| 5229 args[0] = XCAR (val); | |
| 5230 ret = Ffuncall (nargs, args); | |
| 5231 } | |
| 5232 } | |
| 5233 | |
| 5234 UNGCPRO; | |
| 5235 return ret; | |
| 5236 } | |
| 5237 } | |
| 5238 | |
| 5239 Lisp_Object | |
| 5240 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5241 enum run_hooks_condition cond) | |
| 5242 { | |
| 5243 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5244 } | |
| 5245 | |
| 5246 #if 0 | |
| 5247 | |
| 853 | 5248 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5249 |
| 5250 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5251 present value of that symbol. | |
| 5252 Call each element of FUNLIST, | |
| 5253 passing each of them the rest of ARGS. | |
| 5254 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5255 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5256 | |
| 5257 Lisp_Object | |
| 5258 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5259 { | |
| 853 | 5260 omitted; |
| 428 | 5261 } |
| 5262 | |
| 5263 #endif /* 0 */ | |
| 5264 | |
| 5265 void | |
| 5266 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5267 { | |
| 5268 /* This function can GC */ | |
| 5269 struct gcpro gcpro1; | |
| 5270 int i; | |
| 5271 va_list vargs; | |
| 5272 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5273 | |
| 5274 va_start (vargs, nargs); | |
| 5275 funcall_args[0] = hook_var; | |
| 5276 for (i = 0; i < nargs; i++) | |
| 5277 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5278 va_end (vargs); | |
| 5279 | |
| 5280 GCPRO1 (*funcall_args); | |
| 5281 gcpro1.nvars = nargs + 1; | |
| 5282 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5283 UNGCPRO; | |
| 5284 } | |
| 5285 | |
| 5286 void | |
| 5287 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5288 int nargs, ...) | |
| 5289 { | |
| 5290 /* This function can GC */ | |
| 5291 struct gcpro gcpro1; | |
| 5292 int i; | |
| 5293 va_list vargs; | |
| 5294 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5295 | |
| 5296 va_start (vargs, nargs); | |
| 5297 funcall_args[0] = hook_var; | |
| 5298 for (i = 0; i < nargs; i++) | |
| 5299 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5300 va_end (vargs); | |
| 5301 | |
| 5302 GCPRO1 (*funcall_args); | |
| 5303 gcpro1.nvars = nargs + 1; | |
| 5304 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5305 RUN_HOOKS_TO_COMPLETION); | |
| 5306 UNGCPRO; | |
| 5307 } | |
| 5308 | |
| 5309 Lisp_Object | |
| 5310 run_hook (Lisp_Object hook) | |
| 5311 { | |
| 853 | 5312 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5313 } |
| 5314 | |
| 5315 | |
| 5316 /************************************************************************/ | |
| 5317 /* Front-ends to eval, funcall, apply */ | |
| 5318 /************************************************************************/ | |
| 5319 | |
| 5320 /* Apply fn to arg */ | |
| 5321 Lisp_Object | |
| 5322 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5323 { | |
| 5324 /* This function can GC */ | |
| 5325 struct gcpro gcpro1; | |
| 5326 Lisp_Object args[2]; | |
| 5327 | |
| 5328 if (NILP (arg)) | |
| 5329 return Ffuncall (1, &fn); | |
| 5330 GCPRO1 (args[0]); | |
| 5331 gcpro1.nvars = 2; | |
| 5332 args[0] = fn; | |
| 5333 args[1] = arg; | |
| 5334 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5335 } | |
| 5336 | |
| 5337 /* Call function fn on no arguments */ | |
| 5338 Lisp_Object | |
| 5339 call0 (Lisp_Object fn) | |
| 5340 { | |
| 5341 /* This function can GC */ | |
| 5342 struct gcpro gcpro1; | |
| 5343 | |
| 5344 GCPRO1 (fn); | |
| 5345 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5346 } | |
| 5347 | |
| 5348 /* Call function fn with argument arg0 */ | |
| 5349 Lisp_Object | |
| 5350 call1 (Lisp_Object fn, | |
| 5351 Lisp_Object arg0) | |
| 5352 { | |
| 5353 /* This function can GC */ | |
| 5354 struct gcpro gcpro1; | |
| 5355 Lisp_Object args[2]; | |
| 5356 args[0] = fn; | |
| 5357 args[1] = arg0; | |
| 5358 GCPRO1 (args[0]); | |
| 5359 gcpro1.nvars = 2; | |
| 5360 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5361 } | |
| 5362 | |
| 5363 /* Call function fn with arguments arg0, arg1 */ | |
| 5364 Lisp_Object | |
| 5365 call2 (Lisp_Object fn, | |
| 5366 Lisp_Object arg0, Lisp_Object arg1) | |
| 5367 { | |
| 5368 /* This function can GC */ | |
| 5369 struct gcpro gcpro1; | |
| 5370 Lisp_Object args[3]; | |
| 5371 args[0] = fn; | |
| 5372 args[1] = arg0; | |
| 5373 args[2] = arg1; | |
| 5374 GCPRO1 (args[0]); | |
| 5375 gcpro1.nvars = 3; | |
| 5376 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5377 } | |
| 5378 | |
| 5379 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5380 Lisp_Object | |
| 5381 call3 (Lisp_Object fn, | |
| 5382 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5383 { | |
| 5384 /* This function can GC */ | |
| 5385 struct gcpro gcpro1; | |
| 5386 Lisp_Object args[4]; | |
| 5387 args[0] = fn; | |
| 5388 args[1] = arg0; | |
| 5389 args[2] = arg1; | |
| 5390 args[3] = arg2; | |
| 5391 GCPRO1 (args[0]); | |
| 5392 gcpro1.nvars = 4; | |
| 5393 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5394 } | |
| 5395 | |
| 5396 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5397 Lisp_Object | |
| 5398 call4 (Lisp_Object fn, | |
| 5399 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5400 Lisp_Object arg3) | |
| 5401 { | |
| 5402 /* This function can GC */ | |
| 5403 struct gcpro gcpro1; | |
| 5404 Lisp_Object args[5]; | |
| 5405 args[0] = fn; | |
| 5406 args[1] = arg0; | |
| 5407 args[2] = arg1; | |
| 5408 args[3] = arg2; | |
| 5409 args[4] = arg3; | |
| 5410 GCPRO1 (args[0]); | |
| 5411 gcpro1.nvars = 5; | |
| 5412 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5413 } | |
| 5414 | |
| 5415 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5416 Lisp_Object | |
| 5417 call5 (Lisp_Object fn, | |
| 5418 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5419 Lisp_Object arg3, Lisp_Object arg4) | |
| 5420 { | |
| 5421 /* This function can GC */ | |
| 5422 struct gcpro gcpro1; | |
| 5423 Lisp_Object args[6]; | |
| 5424 args[0] = fn; | |
| 5425 args[1] = arg0; | |
| 5426 args[2] = arg1; | |
| 5427 args[3] = arg2; | |
| 5428 args[4] = arg3; | |
| 5429 args[5] = arg4; | |
| 5430 GCPRO1 (args[0]); | |
| 5431 gcpro1.nvars = 6; | |
| 5432 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5433 } | |
| 5434 | |
| 5435 Lisp_Object | |
| 5436 call6 (Lisp_Object fn, | |
| 5437 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5438 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5439 { | |
| 5440 /* This function can GC */ | |
| 5441 struct gcpro gcpro1; | |
| 5442 Lisp_Object args[7]; | |
| 5443 args[0] = fn; | |
| 5444 args[1] = arg0; | |
| 5445 args[2] = arg1; | |
| 5446 args[3] = arg2; | |
| 5447 args[4] = arg3; | |
| 5448 args[5] = arg4; | |
| 5449 args[6] = arg5; | |
| 5450 GCPRO1 (args[0]); | |
| 5451 gcpro1.nvars = 7; | |
| 5452 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5453 } | |
| 5454 | |
| 5455 Lisp_Object | |
| 5456 call7 (Lisp_Object fn, | |
| 5457 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5458 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5459 Lisp_Object arg6) | |
| 5460 { | |
| 5461 /* This function can GC */ | |
| 5462 struct gcpro gcpro1; | |
| 5463 Lisp_Object args[8]; | |
| 5464 args[0] = fn; | |
| 5465 args[1] = arg0; | |
| 5466 args[2] = arg1; | |
| 5467 args[3] = arg2; | |
| 5468 args[4] = arg3; | |
| 5469 args[5] = arg4; | |
| 5470 args[6] = arg5; | |
| 5471 args[7] = arg6; | |
| 5472 GCPRO1 (args[0]); | |
| 5473 gcpro1.nvars = 8; | |
| 5474 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5475 } | |
| 5476 | |
| 5477 Lisp_Object | |
| 5478 call8 (Lisp_Object fn, | |
| 5479 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5480 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5481 Lisp_Object arg6, Lisp_Object arg7) | |
| 5482 { | |
| 5483 /* This function can GC */ | |
| 5484 struct gcpro gcpro1; | |
| 5485 Lisp_Object args[9]; | |
| 5486 args[0] = fn; | |
| 5487 args[1] = arg0; | |
| 5488 args[2] = arg1; | |
| 5489 args[3] = arg2; | |
| 5490 args[4] = arg3; | |
| 5491 args[5] = arg4; | |
| 5492 args[6] = arg5; | |
| 5493 args[7] = arg6; | |
| 5494 args[8] = arg7; | |
| 5495 GCPRO1 (args[0]); | |
| 5496 gcpro1.nvars = 9; | |
| 5497 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5498 } | |
| 5499 | |
| 5500 Lisp_Object | |
| 5501 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5502 { | |
| 5503 if (current_buffer == buf) | |
| 5504 return call0 (fn); | |
| 5505 else | |
| 5506 { | |
| 5507 Lisp_Object val; | |
| 5508 int speccount = specpdl_depth(); | |
| 5509 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5510 set_buffer_internal (buf); | |
| 5511 val = call0 (fn); | |
| 771 | 5512 unbind_to (speccount); |
| 428 | 5513 return val; |
| 5514 } | |
| 5515 } | |
| 5516 | |
| 5517 Lisp_Object | |
| 5518 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5519 Lisp_Object arg0) | |
| 5520 { | |
| 5521 if (current_buffer == buf) | |
| 5522 return call1 (fn, arg0); | |
| 5523 else | |
| 5524 { | |
| 5525 Lisp_Object val; | |
| 5526 int speccount = specpdl_depth(); | |
| 5527 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5528 set_buffer_internal (buf); | |
| 5529 val = call1 (fn, arg0); | |
| 771 | 5530 unbind_to (speccount); |
| 428 | 5531 return val; |
| 5532 } | |
| 5533 } | |
| 5534 | |
| 5535 Lisp_Object | |
| 5536 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5537 Lisp_Object arg0, Lisp_Object arg1) | |
| 5538 { | |
| 5539 if (current_buffer == buf) | |
| 5540 return call2 (fn, arg0, arg1); | |
| 5541 else | |
| 5542 { | |
| 5543 Lisp_Object val; | |
| 5544 int speccount = specpdl_depth(); | |
| 5545 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5546 set_buffer_internal (buf); | |
| 5547 val = call2 (fn, arg0, arg1); | |
| 771 | 5548 unbind_to (speccount); |
| 428 | 5549 return val; |
| 5550 } | |
| 5551 } | |
| 5552 | |
| 5553 Lisp_Object | |
| 5554 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5555 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5556 { | |
| 5557 if (current_buffer == buf) | |
| 5558 return call3 (fn, arg0, arg1, arg2); | |
| 5559 else | |
| 5560 { | |
| 5561 Lisp_Object val; | |
| 5562 int speccount = specpdl_depth(); | |
| 5563 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5564 set_buffer_internal (buf); | |
| 5565 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5566 unbind_to (speccount); |
| 428 | 5567 return val; |
| 5568 } | |
| 5569 } | |
| 5570 | |
| 5571 Lisp_Object | |
| 5572 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5573 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5574 Lisp_Object arg3) | |
| 5575 { | |
| 5576 if (current_buffer == buf) | |
| 5577 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5578 else | |
| 5579 { | |
| 5580 Lisp_Object val; | |
| 5581 int speccount = specpdl_depth(); | |
| 5582 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5583 set_buffer_internal (buf); | |
| 5584 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5585 unbind_to (speccount); |
| 428 | 5586 return val; |
| 5587 } | |
| 5588 } | |
| 5589 | |
| 5590 Lisp_Object | |
| 5591 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5592 { | |
| 5593 if (current_buffer == buf) | |
| 5594 return Feval (form); | |
| 5595 else | |
| 5596 { | |
| 5597 Lisp_Object val; | |
| 5598 int speccount = specpdl_depth(); | |
| 5599 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5600 set_buffer_internal (buf); | |
| 5601 val = Feval (form); | |
| 771 | 5602 unbind_to (speccount); |
| 428 | 5603 return val; |
| 5604 } | |
| 5605 } | |
| 5606 | |
| 5607 | |
| 5608 /************************************************************************/ | |
| 5609 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5610 /************************************************************************/ | |
| 5611 | |
| 853 | 5612 int |
| 5613 get_inhibit_flags (void) | |
| 5614 { | |
| 5615 return inhibit_flags; | |
| 5616 } | |
| 5617 | |
| 5618 void | |
| 2286 | 5619 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5620 { |
| 5621 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5622 { | |
| 5623 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5624 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5625 invalid_change | |
| 5626 ("Modification of this buffer not currently permitted", obj); | |
| 5627 } | |
| 5628 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5629 { | |
| 5630 if (what == OPERATION_DELETE_OBJECT | |
| 5631 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5632 || CONSOLEP (obj)) | |
| 5633 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5634 invalid_change | |
| 5635 ("Deletion of this object not currently permitted", obj); | |
| 5636 } | |
| 5637 } | |
| 5638 | |
| 5639 void | |
| 5640 note_object_created (Lisp_Object obj) | |
| 5641 { | |
| 5642 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5643 { | |
| 5644 if (BUFFERP (obj)) | |
| 5645 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5646 } | |
| 5647 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5648 { | |
| 5649 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5650 || CONSOLEP (obj)) | |
| 5651 Vdeletable_permanent_display_objects = | |
| 5652 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5653 } | |
| 5654 } | |
| 5655 | |
| 5656 void | |
| 5657 note_object_deleted (Lisp_Object obj) | |
| 5658 { | |
| 5659 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5660 { | |
| 5661 if (BUFFERP (obj)) | |
| 5662 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5663 } | |
| 5664 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5665 { | |
| 5666 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5667 || CONSOLEP (obj)) | |
| 5668 Vdeletable_permanent_display_objects = | |
| 5669 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5670 } | |
| 5671 } | |
| 5672 | |
| 5673 struct call_trapping_problems | |
| 5674 { | |
| 5675 Lisp_Object catchtag; | |
| 5676 Lisp_Object error_conditions; | |
| 5677 Lisp_Object data; | |
| 5678 Lisp_Object backtrace; | |
| 5679 Lisp_Object warning_class; | |
| 5680 | |
| 867 | 5681 const CIbyte *warning_string; |
| 853 | 5682 Lisp_Object (*fun) (void *); |
| 5683 void *arg; | |
| 5684 }; | |
| 428 | 5685 |
| 2532 | 5686 static Lisp_Object |
| 5687 maybe_get_trapping_problems_backtrace (void) | |
| 5688 { | |
| 5689 Lisp_Object backtrace; | |
| 853 | 5690 |
| 1123 | 5691 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5692 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5693 { |
| 1333 | 5694 struct gcpro gcpro1; |
| 5695 Lisp_Object lstream = Qnil; | |
| 5696 int speccount = specpdl_depth (); | |
| 5697 | |
| 853 | 5698 /* We're no longer protected against errors or quit here, so at |
| 5699 least let's temporarily inhibit quit. We definitely do not | |
| 5700 want to inhibit quit during the calling of the function | |
| 5701 itself!!!!!!!!!!! */ | |
| 5702 | |
| 5703 specbind (Qinhibit_quit, Qt); | |
| 5704 | |
| 5705 GCPRO1 (lstream); | |
| 5706 lstream = make_resizing_buffer_output_stream (); | |
| 5707 Fbacktrace (lstream, Qt); | |
| 5708 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5709 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5710 Lstream_delete (XLSTREAM (lstream)); |
| 5711 UNGCPRO; | |
| 5712 | |
| 5713 unbind_to (speccount); | |
| 428 | 5714 } |
| 853 | 5715 else |
| 2532 | 5716 backtrace = Qnil; |
| 5717 | |
| 5718 return backtrace; | |
| 5719 } | |
| 5720 | |
| 5721 static DECLARE_DOESNT_RETURN_TYPE | |
| 5722 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5723 | |
| 5724 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5725 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5726 Lisp_Object opaque) | |
| 5727 { | |
| 5728 struct call_trapping_problems *p = | |
| 5729 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5730 | |
| 5731 if (!EQ (error_conditions, Qquit)) | |
| 5732 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5733 else | |
| 853 | 5734 p->backtrace = Qnil; |
| 5735 p->error_conditions = error_conditions; | |
| 5736 p->data = data; | |
| 5737 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5738 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5739 RETURN_NOT_REACHED (Qnil); |
| 853 | 5740 } |
| 5741 | |
| 5742 static Lisp_Object | |
| 5743 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5744 { | |
| 5745 struct call_trapping_problems *p = | |
| 5746 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5747 | |
| 5748 return (p->fun) (p->arg); | |
| 428 | 5749 } |
| 5750 | |
| 5751 static Lisp_Object | |
| 853 | 5752 call_trapping_problems_1 (Lisp_Object opaque) |
| 5753 { | |
| 5754 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5755 call_trapping_problems_2, opaque); | |
| 5756 } | |
| 5757 | |
| 1333 | 5758 static void |
| 5759 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5760 const CIbyte *warning_string, | |
| 5761 struct call_trapping_problems_result *p) | |
| 5762 { | |
| 5763 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5764 { | |
| 5765 int depth = specpdl_depth (); | |
| 5766 | |
| 5767 /* We're no longer protected against errors or quit here, so at | |
| 5768 least let's temporarily inhibit quit. */ | |
| 5769 specbind (Qinhibit_quit, Qt); | |
| 5770 | |
| 5771 if (p->caught_throw) | |
| 5772 { | |
| 5773 Lisp_Object errstr = | |
| 5774 emacs_sprintf_string_lisp | |
| 2532 | 5775 ("%s: Attempt to throw outside of function:" |
| 5776 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5777 Qnil, 4, |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5778 build_msg_cistring (warning_string ? warning_string : "error"), |
| 2532 | 5779 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5780 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5781 } | |
| 2421 | 5782 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5783 { |
| 5784 Lisp_Object errstr; | |
| 5785 /* #### This should call | |
| 5786 (with-output-to-string (display-error (cons error_conditions | |
| 5787 data)) | |
| 5788 but that stuff is all in Lisp currently. */ | |
| 5789 errstr = | |
| 5790 emacs_sprintf_string_lisp | |
| 5791 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5792 Qnil, 4, | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5793 build_msg_cistring (warning_string ? warning_string : "error"), |
| 1333 | 5794 p->error_conditions, p->data, p->backtrace); |
| 5795 | |
| 5796 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5797 errstr); | |
| 5798 } | |
| 5799 | |
| 5800 unbind_to (depth); | |
| 5801 } | |
| 5802 } | |
| 5803 | |
| 1318 | 5804 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5805 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5806 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5807 use call_trapping_problems() for that. Turn the flags off with | |
| 5808 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5809 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5810 various other flags). */ | |
| 5811 | |
| 5812 int | |
| 5813 set_trapping_problems_flags (int flags) | |
| 5814 { | |
| 5815 int new_inhibit_flags; | |
| 5816 | |
| 5817 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5818 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5819 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5820 | INHIBIT_ENTERING_DEBUGGER | |
| 5821 | INHIBIT_WARNING_ISSUE | |
| 5822 | INHIBIT_GC; | |
| 5823 | |
| 5824 new_inhibit_flags = inhibit_flags | flags; | |
| 5825 if (new_inhibit_flags != inhibit_flags) | |
| 5826 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5827 | |
| 5828 if (flags & INHIBIT_QUIT) | |
| 5829 specbind (Qinhibit_quit, Qt); | |
| 5830 | |
| 5831 if (flags & UNINHIBIT_QUIT) | |
| 5832 begin_do_check_for_quit (); | |
| 5833 | |
| 5834 if (flags & INHIBIT_GC) | |
| 5835 begin_gc_forbidden (); | |
| 5836 | |
| 5837 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5838 inner one creates some buffers/etc., should the outer one be able | |
| 5839 to delete them? I think so, but it means we need to combine rather | |
| 5840 than just reset the value. */ | |
| 5841 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5842 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5843 | |
| 5844 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5845 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5846 | |
| 5847 return flags; | |
| 5848 } | |
| 5849 | |
| 853 | 5850 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5851 can be trapped or inhibited, according to FLAGS. | |
| 5852 | |
| 5853 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5854 the error is caught and a warning is issued, specifying the | |
| 5855 specific error that occurred and a backtrace. In that case, | |
| 5856 WARNING_STRING should be given, and will be printed at the | |
| 5857 beginning of the error to indicate where the error occurred. | |
| 5858 | |
| 5859 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5860 `throw' out of the function being called are trapped, and a warning | |
| 5861 issued. (Again, WARNING_STRING should be given.) | |
| 5862 | |
| 2367 | 5863 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5864 this applies to recursive invocations of call_trapping_problems, too. |
| 5865 | |
| 1333 | 5866 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5867 but values useful for generating a warning are still computed (in | |
| 5868 particular, the backtrace), so that the calling function can issue | |
| 5869 a warning. | |
| 5870 | |
| 853 | 5871 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5872 issued, but at level `debug', which normally is below the minimum | |
| 5873 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5874 be ignored entirely. The user can change this variable, however, | |
| 5875 to see the warnings.) | |
| 5876 | |
| 5877 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5878 given, you are *guaranteed* that there will be no non-local exits | |
| 5879 out of this function. | |
| 5880 | |
| 5881 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5882 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5883 automatically caught as well, and treated as an error; you can | |
| 5884 check for this using EQ (problems->error_conditions, Qquit). | |
| 5885 | |
| 5886 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5887 turned on. (It will abort the code being called, but will still be | |
| 5888 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5889 given.) This is useful when QUIT checking has been turned off by a | |
| 5890 higher-level caller. | |
| 5891 | |
| 5892 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5893 This is useful for Lisp called within redisplay, for example. |
| 853 | 5894 |
| 5895 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5896 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5897 or consoles that were already in existence at the time this function | |
| 5898 was called. (However, it's perfectly legal for code to create a new | |
| 5899 buffer and then delete it.) | |
| 5900 | |
| 5901 #### It might be useful to have a flag that inhibits deletion of a | |
| 5902 specific permanent display object and everything it's attached to | |
| 5903 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5904 attached to. | |
| 5905 | |
| 5906 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5907 code is not allowed to modify the text of any buffers that were | |
| 5908 already in existence at the time this function was called. | |
| 5909 (However, it's perfectly legal for code to create a new buffer and | |
| 5910 then modify its text.) | |
| 5911 | |
| 5912 [These last two flags are implemented using global variables | |
| 5913 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5914 which keep track of a list of all buffers or permanent display | |
| 5915 objects created since the last time one of these flags was set. | |
| 5916 The code that deletes buffers, etc. and modifies buffers checks | |
| 5917 | |
| 5918 (1) if the corresponding flag is set (through the global variable | |
| 5919 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5920 | |
| 5921 (2) if the object to be modified or deleted is not in the | |
| 5922 appropriate list. | |
| 5923 | |
| 5924 If so, it signals an error. | |
| 5925 | |
| 5926 Recursive calls to call_trapping_problems() are allowed. In | |
| 5927 the case of the two flags mentioned above, the current values | |
| 5928 of the global variables are stored in an unwind-protect, and | |
| 5929 they're reset to nil.] | |
| 5930 | |
| 5931 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5932 be entered if an error occurs inside the Lisp code being called, | |
| 5933 even when the user has requested an error. In such case, a warning | |
| 5934 is issued stating that access to the debugger is denied, unless | |
| 5935 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5936 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5937 in such cases either the display is in an inconsistent state or | |
| 5938 doing window operations is explicitly forbidden by the OS, and the | |
| 5939 debugger would causes visual changes on the screen and might create | |
| 5940 another frame. | |
| 5941 | |
| 5942 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5943 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5944 specifiers relating to display, other variables relating to | |
| 5945 display, splitting, deleting, or resizing windows or frames, | |
| 5946 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5947 allowed. This is for things called absolutely in the middle of | |
| 5948 redisplay, which expects things to be *exactly* the same after the | |
| 5949 call as before. This isn't completely implemented and needs to be | |
| 5950 thought out some more to determine exactly what its semantics are. | |
| 5951 For the moment, turning on this flag also turns on | |
| 5952 | |
| 5953 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5954 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5955 INHIBIT_ENTERING_DEBUGGER | |
| 5956 INHIBIT_WARNING_ISSUE | |
| 5957 INHIBIT_GC | |
| 5958 | |
| 5959 #### The following five flags are defined, but unimplemented: | |
| 5960 | |
| 5961 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5962 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5963 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5964 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5965 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5966 | |
| 5967 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5968 call_with_suspended_errors() was invoked. This exists only for | |
| 5969 debugging purposes -- often we want to break when a signal happens, | |
| 5970 but ignore signals from call_with_suspended_errors(), because they | |
| 5971 occur often and for legitimate reasons. | |
| 5972 | |
| 5973 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5974 which exact information about any occurring problems (either an | |
| 5975 error or an attempted throw past this boundary). | |
| 5976 | |
| 5977 If a problem occurred and aborted operation (error, quit, or | |
| 5978 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5979 from the call to (*fun) (arg) is returned. */ | |
| 5980 | |
| 5981 Lisp_Object | |
| 5982 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5983 const CIbyte *warning_string, |
| 853 | 5984 int flags, |
| 5985 struct call_trapping_problems_result *problem, | |
| 5986 Lisp_Object (*fun) (void *), | |
| 5987 void *arg) | |
| 5988 { | |
| 1318 | 5989 int speccount = specpdl_depth (); |
| 853 | 5990 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 5991 struct call_trapping_problems package; | |
| 1333 | 5992 struct call_trapping_problems_result real_problem; |
| 2532 | 5993 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 5994 int thrown = 0; |
| 5995 | |
| 5996 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 5997 assert (!NILP (warning_class)); | |
| 5998 | |
| 5999 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 6000 | |
| 6001 package.warning_class = warning_class; | |
| 6002 package.warning_string = warning_string; | |
| 6003 package.fun = fun; | |
| 6004 package.arg = arg; | |
| 6005 package.catchtag = | |
| 6006 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 6007 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 6008 Qnil; | |
| 6009 package.error_conditions = Qnil; | |
| 6010 package.data = Qnil; | |
| 6011 package.backtrace = Qnil; | |
| 6012 | |
| 1318 | 6013 flags = set_trapping_problems_flags (flags); |
| 853 | 6014 |
| 6015 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 6016 opaque = make_opaque_ptr (&package); | |
| 6017 else | |
| 6018 opaque = Qnil; | |
| 6019 | |
| 6020 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 6021 package.backtrace, opaque); | |
| 6022 | |
| 6023 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 6024 /* We need a catch so that our condition-handler can throw back here | |
| 6025 after printing the warning. (We print the warning in the stack | |
| 6026 context of the error, so we can get a backtrace.) */ | |
| 6027 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 6028 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6029 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 6030 /* We skip over the first wrapper, which traps errors. */ | |
| 6031 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 6032 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6033 else |
| 6034 /* Nothing special. */ | |
| 6035 tem = (fun) (arg); | |
| 6036 | |
| 1333 | 6037 if (!problem) |
| 6038 problem = &real_problem; | |
| 6039 | |
| 6040 if (!thrown) | |
| 853 | 6041 { |
| 1333 | 6042 problem->caught_error = 0; |
| 6043 problem->caught_throw = 0; | |
| 6044 problem->error_conditions = Qnil; | |
| 6045 problem->data = Qnil; | |
| 6046 problem->backtrace = Qnil; | |
| 6047 problem->thrown_tag = Qnil; | |
| 6048 problem->thrown_value = Qnil; | |
| 853 | 6049 } |
| 1333 | 6050 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 6051 { |
| 1333 | 6052 problem->caught_error = 1; |
| 6053 problem->caught_throw = 0; | |
| 6054 problem->error_conditions = package.error_conditions; | |
| 6055 problem->data = package.data; | |
| 6056 problem->backtrace = package.backtrace; | |
| 6057 problem->thrown_tag = Qnil; | |
| 6058 problem->thrown_value = Qnil; | |
| 853 | 6059 } |
| 1333 | 6060 else |
| 6061 { | |
| 6062 problem->caught_error = 0; | |
| 6063 problem->caught_throw = 1; | |
| 6064 problem->error_conditions = Qnil; | |
| 6065 problem->data = Qnil; | |
| 2532 | 6066 problem->backtrace = thrown_backtrace; |
| 1333 | 6067 problem->thrown_tag = thrown_tag; |
| 6068 problem->thrown_value = tem; | |
| 6069 } | |
| 6070 | |
| 6071 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6072 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6073 problem); | |
| 853 | 6074 |
| 6075 if (!NILP (package.catchtag) && | |
| 6076 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6077 free_opaque_ptr (package.catchtag); | |
| 6078 | |
| 6079 if (!NILP (opaque)) | |
| 6080 free_opaque_ptr (opaque); | |
| 6081 | |
| 6082 unbind_to (speccount); | |
| 6083 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6084 } | |
| 6085 | |
| 6086 struct va_call_trapping_problems | |
| 6087 { | |
| 6088 lisp_fn_t fun; | |
| 6089 int nargs; | |
| 6090 Lisp_Object *args; | |
| 6091 }; | |
| 6092 | |
| 6093 static Lisp_Object | |
| 6094 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6095 { | |
| 6096 struct va_call_trapping_problems *ai_no_corrida = | |
| 6097 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6098 Lisp_Object pegar_no_bumbum; | |
| 6099 | |
| 6100 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6101 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6102 return pegar_no_bumbum; | |
| 6103 } | |
| 6104 | |
| 6105 /* #### document me. */ | |
| 6106 | |
| 6107 Lisp_Object | |
| 6108 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6109 const CIbyte *warning_string, |
| 853 | 6110 int flags, |
| 6111 struct call_trapping_problems_result *problem, | |
| 6112 lisp_fn_t fun, int nargs, ...) | |
| 6113 { | |
| 6114 va_list vargs; | |
| 6115 Lisp_Object args[20]; | |
| 6116 int i; | |
| 6117 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6118 struct gcpro gcpro1; | |
| 6119 | |
| 6120 assert (nargs >= 0 && nargs < 20); | |
| 6121 | |
| 6122 va_start (vargs, nargs); | |
| 6123 for (i = 0; i < nargs; i++) | |
| 6124 args[i] = va_arg (vargs, Lisp_Object); | |
| 6125 va_end (vargs); | |
| 6126 | |
| 6127 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6128 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6129 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6130 | |
| 6131 GCPRO1_ARRAY (args, nargs); | |
| 6132 RETURN_UNGCPRO | |
| 6133 (call_trapping_problems | |
| 6134 (warning_class, warning_string, flags, problem, | |
| 6135 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6136 } | |
| 6137 | |
| 6138 /* this is an older interface, barely different from | |
| 6139 va_call_trapping_problems. | |
| 6140 | |
| 6141 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6142 va_call_trapping_problems(). */ | |
| 6143 | |
| 6144 Lisp_Object | |
| 6145 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6146 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6147 int nargs, ...) |
| 6148 { | |
| 6149 va_list vargs; | |
| 6150 Lisp_Object args[20]; | |
| 6151 int i; | |
| 6152 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6153 int flags; | |
| 6154 struct gcpro gcpro1; | |
| 6155 | |
| 1204 | 6156 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6157 assert (!NILP (class_)); | |
| 853 | 6158 assert (nargs >= 0 && nargs < 20); |
| 6159 | |
| 6160 va_start (vargs, nargs); | |
| 6161 for (i = 0; i < nargs; i++) | |
| 6162 args[i] = va_arg (vargs, Lisp_Object); | |
| 6163 va_end (vargs); | |
| 6164 | |
| 6165 /* If error-checking is not disabled, just call the function. */ | |
| 6166 | |
| 6167 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6168 { | |
| 6169 Lisp_Object val; | |
| 6170 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6171 return val; | |
| 6172 } | |
| 6173 | |
| 6174 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6175 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6176 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6177 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6178 else | |
| 6179 { | |
| 6180 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6181 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6182 } | |
| 6183 | |
| 6184 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6185 | |
| 6186 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6187 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6188 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6189 | |
| 6190 GCPRO1_ARRAY (args, nargs); | |
| 6191 { | |
| 6192 Lisp_Object its_way_too_goddamn_late = | |
| 6193 call_trapping_problems | |
| 1204 | 6194 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6195 &fazer_invocacao_atrapalhando_problemas); |
| 6196 UNGCPRO; | |
| 6197 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6198 return retval; | |
| 6199 else | |
| 6200 return its_way_too_goddamn_late; | |
| 6201 } | |
| 6202 } | |
| 6203 | |
| 6204 struct calln_trapping_problems | |
| 6205 { | |
| 6206 int nargs; | |
| 6207 Lisp_Object *args; | |
| 6208 }; | |
| 6209 | |
| 6210 static Lisp_Object | |
| 6211 calln_trapping_problems_1 (void *puta) | |
| 6212 { | |
| 6213 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6214 | |
| 6215 return Ffuncall (p->nargs, p->args); | |
| 428 | 6216 } |
| 6217 | |
| 6218 static Lisp_Object | |
| 853 | 6219 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6220 const CIbyte *warning_string, int flags, |
| 853 | 6221 struct call_trapping_problems_result *problem, |
| 6222 int nargs, Lisp_Object *args) | |
| 6223 { | |
| 6224 struct calln_trapping_problems foo; | |
| 6225 struct gcpro gcpro1; | |
| 6226 | |
| 6227 if (SYMBOLP (args[0])) | |
| 6228 { | |
| 6229 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6230 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6231 { | |
| 6232 if (problem) | |
| 6233 { | |
| 6234 problem->caught_error = 0; | |
| 6235 problem->caught_throw = 0; | |
| 6236 problem->error_conditions = Qnil; | |
| 6237 problem->data = Qnil; | |
| 6238 problem->backtrace = Qnil; | |
| 6239 problem->thrown_tag = Qnil; | |
| 6240 problem->thrown_value = Qnil; | |
| 6241 } | |
| 6242 return Qnil; | |
| 6243 } | |
| 6244 } | |
| 6245 | |
| 6246 foo.nargs = nargs; | |
| 6247 foo.args = args; | |
| 6248 | |
| 6249 GCPRO1_ARRAY (args, nargs); | |
| 6250 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6251 flags, problem, | |
| 6252 calln_trapping_problems_1, | |
| 6253 &foo)); | |
| 6254 } | |
| 6255 | |
| 6256 /* #### fix these functions to follow the calling convention of | |
| 6257 call_trapping_problems! */ | |
| 6258 | |
| 6259 Lisp_Object | |
| 867 | 6260 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6261 int flags) |
| 6262 { | |
| 6263 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6264 &function); | |
| 428 | 6265 } |
| 6266 | |
| 6267 Lisp_Object | |
| 867 | 6268 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6269 Lisp_Object object, int flags) |
| 6270 { | |
| 6271 Lisp_Object args[2]; | |
| 6272 | |
| 6273 args[0] = function; | |
| 6274 args[1] = object; | |
| 6275 | |
| 6276 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6277 args); | |
| 6278 } | |
| 6279 | |
| 6280 Lisp_Object | |
| 867 | 6281 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6282 Lisp_Object object1, Lisp_Object object2, |
| 6283 int flags) | |
| 6284 { | |
| 6285 Lisp_Object args[3]; | |
| 6286 | |
| 6287 args[0] = function; | |
| 6288 args[1] = object1; | |
| 6289 args[2] = object2; | |
| 6290 | |
| 6291 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6292 args); | |
| 6293 } | |
| 6294 | |
| 6295 Lisp_Object | |
| 867 | 6296 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6297 Lisp_Object object1, Lisp_Object object2, |
| 6298 Lisp_Object object3, int flags) | |
| 6299 { | |
| 6300 Lisp_Object args[4]; | |
| 6301 | |
| 6302 args[0] = function; | |
| 6303 args[1] = object1; | |
| 6304 args[2] = object2; | |
| 6305 args[3] = object3; | |
| 6306 | |
| 6307 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6308 args); | |
| 6309 } | |
| 6310 | |
| 6311 Lisp_Object | |
| 867 | 6312 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6313 Lisp_Object object1, Lisp_Object object2, |
| 6314 Lisp_Object object3, Lisp_Object object4, | |
| 6315 int flags) | |
| 6316 { | |
| 6317 Lisp_Object args[5]; | |
| 6318 | |
| 6319 args[0] = function; | |
| 6320 args[1] = object1; | |
| 6321 args[2] = object2; | |
| 6322 args[3] = object3; | |
| 6323 args[4] = object4; | |
| 6324 | |
| 6325 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6326 args); | |
| 6327 } | |
| 6328 | |
| 6329 Lisp_Object | |
| 867 | 6330 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6331 Lisp_Object object1, Lisp_Object object2, |
| 6332 Lisp_Object object3, Lisp_Object object4, | |
| 6333 Lisp_Object object5, int flags) | |
| 6334 { | |
| 6335 Lisp_Object args[6]; | |
| 6336 | |
| 6337 args[0] = function; | |
| 6338 args[1] = object1; | |
| 6339 args[2] = object2; | |
| 6340 args[3] = object3; | |
| 6341 args[4] = object4; | |
| 6342 args[5] = object5; | |
| 6343 | |
| 6344 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6345 args); | |
| 6346 } | |
| 6347 | |
| 6348 struct eval_in_buffer_trapping_problems | |
| 6349 { | |
| 6350 struct buffer *buf; | |
| 6351 Lisp_Object form; | |
| 6352 }; | |
| 6353 | |
| 6354 static Lisp_Object | |
| 6355 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6356 { | |
| 6357 struct eval_in_buffer_trapping_problems *p = | |
| 6358 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6359 | |
| 6360 return eval_in_buffer (p->buf, p->form); | |
| 6361 } | |
| 6362 | |
| 6363 /* #### fix these functions to follow the calling convention of | |
| 6364 call_trapping_problems! */ | |
| 6365 | |
| 6366 Lisp_Object | |
| 867 | 6367 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6368 struct buffer *buf, Lisp_Object form, |
| 6369 int flags) | |
| 6370 { | |
| 6371 struct eval_in_buffer_trapping_problems p; | |
| 6372 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6373 struct gcpro gcpro1, gcpro2; |
| 6374 | |
| 853 | 6375 GCPRO2 (buffer, form); |
| 6376 p.buf = buf; | |
| 6377 p.form = form; | |
| 6378 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6379 eval_in_buffer_trapping_problems_1, | |
| 6380 &p)); | |
| 6381 } | |
| 6382 | |
| 6383 Lisp_Object | |
| 1333 | 6384 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6385 Lisp_Object hook_symbol, |
| 6386 int flags) | |
| 6387 { | |
| 1333 | 6388 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6389 RUN_HOOKS_TO_COMPLETION, |
| 6390 flags); | |
| 428 | 6391 } |
| 6392 | |
| 6393 static Lisp_Object | |
| 853 | 6394 safe_run_hook_trapping_problems_1 (void *puta) |
| 6395 { | |
| 5013 | 6396 Lisp_Object hook = GET_LISP_FROM_VOID (puta); |
| 853 | 6397 |
| 6398 run_hook (hook); | |
| 428 | 6399 return Qnil; |
| 6400 } | |
| 6401 | |
| 853 | 6402 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6403 if an error occurs (but not a quit). */ | |
| 6404 | |
| 428 | 6405 Lisp_Object |
| 1333 | 6406 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6407 Lisp_Object hook_symbol, int flags) | |
| 853 | 6408 { |
| 428 | 6409 Lisp_Object tem; |
| 853 | 6410 struct gcpro gcpro1, gcpro2; |
| 6411 struct call_trapping_problems_result prob; | |
| 428 | 6412 |
| 6413 if (!initialized || preparing_for_armageddon) | |
| 6414 return Qnil; | |
| 6415 tem = find_symbol_value (hook_symbol); | |
| 6416 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6417 return Qnil; | |
| 6418 | |
| 853 | 6419 GCPRO2 (hook_symbol, tem); |
| 1333 | 6420 tem = call_trapping_problems (Qerror, NULL, |
| 6421 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6422 &prob, |
| 6423 safe_run_hook_trapping_problems_1, | |
| 5013 | 6424 STORE_LISP_IN_VOID (hook_symbol)); |
| 1333 | 6425 { |
| 6426 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6427 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6428 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6429 | |
| 6430 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6431 Qquit))) | |
| 6432 { | |
| 6433 Fset (hook_symbol, Qnil); | |
| 6434 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6435 } | |
| 6436 else | |
| 6437 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6438 | |
| 6439 | |
| 6440 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6441 &prob); | |
| 6442 } | |
| 6443 | |
| 6444 UNGCPRO; | |
| 6445 return tem; | |
| 853 | 6446 } |
| 6447 | |
| 6448 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6449 { | |
| 6450 struct buffer *buf; | |
| 6451 int nargs; | |
| 6452 Lisp_Object *args; | |
| 6453 enum run_hooks_condition cond; | |
| 6454 }; | |
| 6455 | |
| 6456 static Lisp_Object | |
| 6457 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6458 { | |
| 6459 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6460 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6461 | |
| 6462 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6463 porra->cond); | |
| 6464 } | |
| 6465 | |
| 6466 /* #### fix these functions to follow the calling convention of | |
| 6467 call_trapping_problems! */ | |
| 428 | 6468 |
| 6469 Lisp_Object | |
| 1333 | 6470 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6471 struct buffer *buf, int nargs, |
| 6472 Lisp_Object *args, | |
| 6473 enum run_hooks_condition cond, | |
| 6474 int flags) | |
| 6475 { | |
| 6476 Lisp_Object sym, val, ret; | |
| 6477 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6478 struct gcpro gcpro1; |
| 1333 | 6479 Lisp_Object hook_name; |
| 6480 Ibyte *hook_str; | |
| 6481 Ibyte *err; | |
| 428 | 6482 |
| 6483 if (!initialized || preparing_for_armageddon) | |
| 853 | 6484 /* We need to bail out of here pronto. */ |
| 428 | 6485 return Qnil; |
| 6486 | |
| 853 | 6487 GCPRO1_ARRAY (args, nargs); |
| 6488 | |
| 6489 sym = args[0]; | |
| 6490 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6491 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6492 | |
| 6493 if (UNBOUNDP (val) || NILP (val)) | |
| 6494 RETURN_UNGCPRO (ret); | |
| 6495 | |
| 6496 diversity_and_distrust.buf = buf; | |
| 6497 diversity_and_distrust.nargs = nargs; | |
| 6498 diversity_and_distrust.args = args; | |
| 6499 diversity_and_distrust.cond = cond; | |
| 6500 | |
| 1333 | 6501 hook_name = XSYMBOL_NAME (args[0]); |
| 6502 hook_str = XSTRING_DATA (hook_name); | |
| 6503 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6504 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6505 RETURN_UNGCPRO |
| 6506 (call_trapping_problems | |
| 1333 | 6507 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6508 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6509 &diversity_and_distrust)); | |
| 428 | 6510 } |
| 6511 | |
| 6512 Lisp_Object | |
| 1333 | 6513 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6514 int nargs, |
| 6515 Lisp_Object *args, | |
| 6516 enum run_hooks_condition cond, | |
| 6517 int flags) | |
| 6518 { | |
| 6519 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6520 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6521 } |
| 6522 | |
| 6523 Lisp_Object | |
| 1333 | 6524 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6525 Lisp_Object hook_var, |
| 6526 int nargs, ...) | |
| 6527 { | |
| 6528 /* This function can GC */ | |
| 6529 struct gcpro gcpro1; | |
| 6530 int i; | |
| 6531 va_list vargs; | |
| 6532 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6533 int flags; | |
| 6534 | |
| 6535 va_start (vargs, nargs); | |
| 6536 funcall_args[0] = hook_var; | |
| 6537 for (i = 0; i < nargs; i++) | |
| 6538 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6539 flags = va_arg (vargs, int); | |
| 6540 va_end (vargs); | |
| 6541 | |
| 6542 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6543 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6544 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6545 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6546 } |
| 6547 | |
| 6548 Lisp_Object | |
| 1333 | 6549 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6550 struct buffer *buf, |
| 6551 Lisp_Object hook_var, | |
| 6552 int nargs, ...) | |
| 6553 { | |
| 6554 /* This function can GC */ | |
| 6555 struct gcpro gcpro1; | |
| 6556 int i; | |
| 6557 va_list vargs; | |
| 6558 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6559 int flags; | |
| 6560 | |
| 6561 va_start (vargs, nargs); | |
| 6562 funcall_args[0] = hook_var; | |
| 6563 for (i = 0; i < nargs; i++) | |
| 6564 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6565 flags = va_arg (vargs, int); | |
| 6566 va_end (vargs); | |
| 6567 | |
| 6568 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6569 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6570 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6571 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6572 } |
| 6573 | |
| 6574 | |
| 6575 /************************************************************************/ | |
| 6576 /* The special binding stack */ | |
| 771 | 6577 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6578 /* When performance is critical, use the macros in backtrace.h. */ |
| 6579 /************************************************************************/ | |
| 6580 | |
| 6581 #define min_max_specpdl_size 400 | |
| 6582 | |
| 6583 void | |
| 647 | 6584 grow_specpdl (EMACS_INT reserved) |
| 6585 { | |
| 6586 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6587 if (size_needed >= max_specpdl_size) |
| 6588 { | |
| 6589 if (max_specpdl_size < min_max_specpdl_size) | |
| 6590 max_specpdl_size = min_max_specpdl_size; | |
| 6591 if (size_needed >= max_specpdl_size) | |
| 6592 { | |
| 1951 | 6593 /* Leave room for some specpdl in the debugger. */ |
| 6594 max_specpdl_size = size_needed + 100; | |
| 6595 if (max_specpdl_size > specpdl_size) | |
| 6596 { | |
| 6597 specpdl_size = max_specpdl_size; | |
| 6598 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6599 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6600 } | |
| 563 | 6601 signal_continuable_error |
| 6602 (Qstack_overflow, | |
| 6603 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6604 } |
| 6605 } | |
| 6606 while (specpdl_size < size_needed) | |
| 6607 { | |
| 6608 specpdl_size *= 2; | |
| 6609 if (specpdl_size > max_specpdl_size) | |
| 6610 specpdl_size = max_specpdl_size; | |
| 6611 } | |
| 6612 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6613 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6614 check_specbind_stack_sanity (); |
| 428 | 6615 } |
| 6616 | |
| 6617 | |
| 6618 /* Handle unbinding buffer-local variables */ | |
| 6619 static Lisp_Object | |
| 6620 specbind_unwind_local (Lisp_Object ovalue) | |
| 6621 { | |
| 6622 Lisp_Object current = Fcurrent_buffer (); | |
| 6623 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6624 Lisp_Object victim = ovalue; |
| 6625 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6626 ovalue = XCDR (victim); | |
| 428 | 6627 |
| 6628 free_cons (victim); | |
| 6629 | |
| 6630 if (NILP (buf)) | |
| 6631 { | |
| 6632 /* Deleted buffer -- do nothing */ | |
| 6633 } | |
| 6634 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6635 { | |
| 6636 /* Was buffer-local when binding was made, now no longer is. | |
| 6637 * (kill-local-variable can do this.) | |
| 6638 * Do nothing in this case. | |
| 6639 */ | |
| 6640 } | |
| 6641 else if (EQ (buf, current)) | |
| 6642 Fset (symbol, ovalue); | |
| 6643 else | |
| 6644 { | |
| 6645 /* Urk! Somebody switched buffers */ | |
| 6646 struct gcpro gcpro1; | |
| 6647 GCPRO1 (current); | |
| 6648 Fset_buffer (buf); | |
| 6649 Fset (symbol, ovalue); | |
| 6650 Fset_buffer (current); | |
| 6651 UNGCPRO; | |
| 6652 } | |
| 6653 return symbol; | |
| 6654 } | |
| 6655 | |
| 6656 static Lisp_Object | |
| 6657 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6658 { | |
| 6659 Lisp_Object current = Fcurrent_buffer (); | |
| 6660 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6661 | |
| 6662 buffer = get_buffer (buffer, 0); | |
| 6663 if (NILP (buffer)) | |
| 6664 { | |
| 6665 /* Deleted buffer -- do nothing */ | |
| 6666 } | |
| 6667 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6668 { | |
| 6669 /* Was buffer-local when binding was made, now no longer is. | |
| 6670 * (kill-local-variable can do this.) | |
| 6671 * Do nothing in this case. | |
| 6672 */ | |
| 6673 } | |
| 6674 else if (EQ (buffer, current)) | |
| 6675 Fkill_local_variable (symbol); | |
| 6676 else | |
| 6677 { | |
| 6678 /* Urk! Somebody switched buffers */ | |
| 6679 struct gcpro gcpro1; | |
| 6680 GCPRO1 (current); | |
| 6681 Fset_buffer (buffer); | |
| 6682 Fkill_local_variable (symbol); | |
| 6683 Fset_buffer (current); | |
| 6684 UNGCPRO; | |
| 6685 } | |
| 6686 return symbol; | |
| 6687 } | |
| 6688 | |
| 6689 | |
| 6690 void | |
| 6691 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6692 { | |
| 6693 SPECBIND (symbol, value); | |
| 853 | 6694 |
| 6695 check_specbind_stack_sanity (); | |
| 428 | 6696 } |
| 6697 | |
| 6698 void | |
| 6699 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6700 { | |
| 6701 int buffer_local = | |
| 6702 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6703 | |
| 6704 if (buffer_local == 0) | |
| 6705 { | |
| 6706 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6707 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6708 } |
| 6709 else if (buffer_local > 0) | |
| 6710 { | |
| 6711 /* Already buffer-local */ | |
| 6712 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6713 find_symbol_value (symbol)); | |
| 6714 specpdl_ptr->func = specbind_unwind_local; | |
| 6715 } | |
| 6716 else | |
| 6717 { | |
| 6718 /* About to become buffer-local */ | |
| 6719 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6720 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6721 } | |
| 6722 | |
| 6723 specpdl_ptr->symbol = symbol; | |
| 6724 specpdl_ptr++; | |
| 6725 specpdl_depth_counter++; | |
| 6726 | |
| 6727 Fset (symbol, value); | |
| 853 | 6728 |
| 6729 check_specbind_stack_sanity (); | |
| 428 | 6730 } |
| 6731 | |
| 771 | 6732 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6733 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6734 before your function returns normally, passing in the integer returned | |
| 6735 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6736 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6737 ignored. #### We should eliminate it entirely. */ | |
| 6738 | |
| 6739 int | |
| 428 | 6740 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6741 Lisp_Object arg) | |
| 6742 { | |
| 6743 SPECPDL_RESERVE (1); | |
| 6744 specpdl_ptr->func = function; | |
| 6745 specpdl_ptr->symbol = Qnil; | |
| 6746 specpdl_ptr->old_value = arg; | |
| 6747 specpdl_ptr++; | |
| 6748 specpdl_depth_counter++; | |
| 853 | 6749 check_specbind_stack_sanity (); |
| 771 | 6750 return specpdl_depth_counter - 1; |
| 6751 } | |
| 6752 | |
| 6753 static Lisp_Object | |
| 802 | 6754 restore_lisp_object (Lisp_Object cons) |
| 6755 { | |
| 5013 | 6756 Lisp_Object laddr = XCAR (cons); |
| 6757 Lisp_Object *addr = (Lisp_Object *) GET_VOID_FROM_LISP (laddr); | |
| 802 | 6758 *addr = XCDR (cons); |
| 853 | 6759 free_cons (cons); |
| 802 | 6760 return Qnil; |
| 6761 } | |
| 6762 | |
| 6763 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6764 by ADDR with the value VAL. */ | |
| 814 | 6765 static int |
| 802 | 6766 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6767 Lisp_Object val) | |
| 6768 { | |
| 5013 | 6769 /* We use a cons rather than a malloc()ed structure because we want the |
| 6770 Lisp object to have garbage-collection protection */ | |
| 6771 Lisp_Object laddr = STORE_VOID_IN_LISP (addr); | |
| 802 | 6772 return record_unwind_protect (restore_lisp_object, |
| 5013 | 6773 noseeum_cons (laddr, val)); |
| 802 | 6774 } |
| 6775 | |
| 6776 /* Similar to specbind() but for any C variable whose value is a | |
| 6777 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6778 pointed to by ADDR to its existing value, and then changes its | |
| 6779 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6780 pass this to unbind_to() after you are done. */ | |
| 6781 int | |
| 6782 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6783 { | |
| 6784 int count = specpdl_depth (); | |
| 6785 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6786 *addr = newval; | |
| 6787 return count; | |
| 6788 } | |
| 6789 | |
| 5013 | 6790 struct restore_int |
| 6791 { | |
| 6792 int *addr; | |
| 802 | 6793 int val; |
| 5013 | 6794 }; |
| 6795 | |
| 6796 static Lisp_Object | |
| 6797 restore_int (Lisp_Object obj) | |
| 6798 { | |
| 6799 struct restore_int *ri = (struct restore_int *) GET_VOID_FROM_LISP (obj); | |
| 6800 *(ri->addr) = ri->val; | |
| 6801 xfree (ri); | |
| 802 | 6802 return Qnil; |
| 6803 } | |
| 6804 | |
| 6805 /* Establish an unwind-protect which will restore the int pointed to | |
| 6806 by ADDR with the value VAL. This function works correctly with | |
| 6807 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6808 int |
| 802 | 6809 record_unwind_protect_restoring_int (int *addr, int val) |
| 6810 { | |
| 5013 | 6811 struct restore_int *ri = xnew (struct restore_int); |
| 6812 ri->addr = addr; | |
| 6813 ri->val = val; | |
| 6814 return record_unwind_protect (restore_int, STORE_VOID_IN_LISP (ri)); | |
| 802 | 6815 } |
| 6816 | |
| 6817 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6818 Sets up an unwind-protect to restore the variable pointed to by | |
| 6819 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6820 Returns the previous value of specpdl_depth(); pass this to | |
| 6821 unbind_to() after you are done. This function works correctly with | |
| 6822 all ints, even those that don't fit into a Lisp integer. */ | |
| 6823 int | |
| 6824 internal_bind_int (int *addr, int newval) | |
| 6825 { | |
| 6826 int count = specpdl_depth (); | |
| 6827 record_unwind_protect_restoring_int (addr, *addr); | |
| 6828 *addr = newval; | |
| 6829 return count; | |
| 6830 } | |
| 6831 | |
| 6832 static Lisp_Object | |
| 771 | 6833 free_pointer (Lisp_Object opaque) |
| 6834 { | |
| 5013 | 6835 void *ptr = GET_VOID_FROM_LISP (opaque); |
| 6836 xfree (ptr); | |
| 771 | 6837 return Qnil; |
| 6838 } | |
| 6839 | |
| 6840 /* Establish an unwind-protect which will free the specified block. | |
| 6841 */ | |
| 6842 int | |
| 6843 record_unwind_protect_freeing (void *ptr) | |
| 6844 { | |
| 5013 | 6845 return record_unwind_protect (free_pointer, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6846 } |
| 6847 | |
| 6848 static Lisp_Object | |
| 6849 free_dynarr (Lisp_Object opaque) | |
| 6850 { | |
| 5013 | 6851 Dynarr_free (GET_VOID_FROM_LISP (opaque)); |
| 771 | 6852 return Qnil; |
| 6853 } | |
| 6854 | |
| 6855 int | |
| 6856 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6857 { | |
| 5013 | 6858 return record_unwind_protect (free_dynarr, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6859 } |
| 428 | 6860 |
| 6861 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6862 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6863 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6864 Lisp_Object |
| 771 | 6865 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6866 { |
| 6867 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6868 check_specbind_stack_sanity (); |
| 428 | 6869 return value; |
| 6870 } | |
| 6871 | |
| 6872 /* Don't call this directly. | |
| 6873 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6874 void | |
| 6875 unbind_to_hairy (int count) | |
| 6876 { | |
| 442 | 6877 ++specpdl_ptr; |
| 6878 ++specpdl_depth_counter; | |
| 6879 | |
| 428 | 6880 while (specpdl_depth_counter != count) |
| 6881 { | |
| 1313 | 6882 Lisp_Object oquit = Qunbound; |
| 6883 | |
| 6884 /* Do this check BEFORE decrementing the values below, because once | |
| 6885 they're decremented, GC protection is lost on | |
| 6886 specpdl_ptr->old_value. */ | |
| 1322 | 6887 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6888 { |
| 6889 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6890 existing QUIT until afterwards. Only do this, however, for | |
| 6891 unwind-protects established by Lisp code, not by C code | |
| 6892 (e.g. free_opaque_ptr() or something), because the act of | |
| 6893 checking for QUIT can cause all sorts of weird things to | |
| 6894 happen, since it churns the event loop -- redisplay, running | |
| 6895 Lisp, etc. Code should not have to worry about this just | |
| 6896 because of establishing an unwind-protect. */ | |
| 6897 check_quit (); /* make Vquit_flag accurate */ | |
| 6898 oquit = Vquit_flag; | |
| 6899 Vquit_flag = Qnil; | |
| 6900 } | |
| 6901 | |
| 428 | 6902 --specpdl_ptr; |
| 6903 --specpdl_depth_counter; | |
| 6904 | |
| 1313 | 6905 /* #### At this point, there is no GC protection on old_value. This |
| 6906 could be a real problem, depending on what unwind-protect function | |
| 6907 is called. It looks like it just so happens that the ones | |
| 6908 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6909 we should look into fixing this. (Many unwind-protect functions | |
| 6910 free values. Is it a problem if freed values are | |
| 6911 GC-protected?) */ | |
| 428 | 6912 if (specpdl_ptr->func != 0) |
| 1313 | 6913 { |
| 6914 /* An unwind-protect */ | |
| 6915 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6916 } | |
| 6917 | |
| 428 | 6918 else |
| 6919 { | |
| 6920 /* We checked symbol for validity when we specbound it, | |
| 6921 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6922 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6923 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6924 sym->value = specpdl_ptr->old_value; | |
| 6925 else | |
| 6926 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6927 } | |
| 6928 | |
| 6929 #if 0 /* martin */ | |
| 6930 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6931 /* There should never be anything here for us to remove. | |
| 6932 If so, it indicates a logic error in Emacs. Catches | |
| 6933 should get removed when a throw or signal occurs, or | |
| 6934 when a catch or condition-case exits normally. But | |
| 6935 it's too dangerous to just remove this code. --ben */ | |
| 6936 | |
| 6937 /* Furthermore, this code is not in FSFmacs!!! | |
| 6938 Braino on mly's part? */ | |
| 6939 /* If we're unwound past the pdlcount of a catch frame, | |
| 6940 that catch can't possibly still be valid. */ | |
| 6941 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6942 { | |
| 6943 catchlist = catchlist->next; | |
| 6944 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6945 } | |
| 6946 #endif | |
| 6947 #endif | |
| 1313 | 6948 |
| 6949 if (!UNBOUNDP (oquit)) | |
| 6950 Vquit_flag = oquit; | |
| 428 | 6951 } |
| 853 | 6952 check_specbind_stack_sanity (); |
| 428 | 6953 } |
| 6954 | |
| 6955 | |
| 6956 | |
| 6957 /* Get the value of symbol's global binding, even if that binding is | |
| 6958 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6959 | |
| 6960 Lisp_Object | |
| 6961 top_level_value (Lisp_Object symbol) | |
| 6962 { | |
| 6963 REGISTER struct specbinding *ptr = specpdl; | |
| 6964 | |
| 6965 CHECK_SYMBOL (symbol); | |
| 6966 for (; ptr != specpdl_ptr; ptr++) | |
| 6967 { | |
| 6968 if (EQ (ptr->symbol, symbol)) | |
| 6969 return ptr->old_value; | |
| 6970 } | |
| 6971 return XSYMBOL (symbol)->value; | |
| 6972 } | |
| 6973 | |
| 6974 #if 0 | |
| 6975 | |
| 6976 Lisp_Object | |
| 6977 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6978 { | |
| 6979 REGISTER struct specbinding *ptr = specpdl; | |
| 6980 | |
| 6981 CHECK_SYMBOL (symbol); | |
| 6982 for (; ptr != specpdl_ptr; ptr++) | |
| 6983 { | |
| 6984 if (EQ (ptr->symbol, symbol)) | |
| 6985 { | |
| 6986 ptr->old_value = newval; | |
| 6987 return newval; | |
| 6988 } | |
| 6989 } | |
| 6990 return Fset (symbol, newval); | |
| 6991 } | |
| 6992 | |
| 6993 #endif /* 0 */ | |
| 6994 | |
| 6995 | |
| 6996 /************************************************************************/ | |
| 6997 /* Backtraces */ | |
| 6998 /************************************************************************/ | |
| 6999 | |
| 7000 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 7001 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 7002 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 7003 */ | |
| 7004 (level, flag)) | |
| 7005 { | |
| 7006 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7007 REGISTER int i; | |
| 7008 | |
| 7009 CHECK_INT (level); | |
| 7010 | |
| 7011 for (i = 0; backlist && i < XINT (level); i++) | |
| 7012 { | |
| 7013 backlist = backlist->next; | |
| 7014 } | |
| 7015 | |
| 7016 if (backlist) | |
| 7017 backlist->debug_on_exit = !NILP (flag); | |
| 7018 | |
| 7019 return flag; | |
| 7020 } | |
| 7021 | |
| 7022 static void | |
| 7023 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 7024 { | |
| 7025 int printing_bindings = 0; | |
| 7026 | |
| 7027 for (; speccount > speclimit; speccount--) | |
| 7028 { | |
| 7029 if (specpdl[speccount - 1].func == 0 | |
| 7030 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7031 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7032 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7033 write_ascstring (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7034 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7035 printing_bindings = 1; | |
| 7036 } | |
| 7037 else | |
| 7038 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7039 if (printing_bindings) write_ascstring (stream, ")\n"); |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7040 write_ascstring (stream, " # (unwind-protect ...)\n"); |
| 428 | 7041 printing_bindings = 0; |
| 7042 } | |
| 7043 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7044 if (printing_bindings) write_ascstring (stream, ")\n"); |
| 428 | 7045 } |
| 7046 | |
| 1292 | 7047 static Lisp_Object |
| 7048 backtrace_unevalled_args (Lisp_Object *args) | |
| 7049 { | |
| 7050 if (args) | |
| 7051 return *args; | |
| 7052 else | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7053 return list1 (build_ascstring ("[internal]")); |
| 1292 | 7054 } |
| 7055 | |
| 428 | 7056 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7057 Print a trace of Lisp function calls currently active. | |
| 438 | 7058 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7059 and defaults to the value of `standard-output'. |
| 7060 Optional second arg DETAILED non-nil means show places where currently | |
| 7061 active variable bindings, catches, condition-cases, and | |
| 7062 unwind-protects, as well as function calls, were made. | |
| 428 | 7063 */ |
| 7064 (stream, detailed)) | |
| 7065 { | |
| 7066 /* This function can GC */ | |
| 7067 struct backtrace *backlist = backtrace_list; | |
| 7068 struct catchtag *catches = catchlist; | |
| 7069 int speccount = specpdl_depth(); | |
| 7070 | |
| 7071 int old_nl = print_escape_newlines; | |
| 7072 int old_pr = print_readably; | |
| 7073 Lisp_Object old_level = Vprint_level; | |
| 7074 Lisp_Object oiq = Vinhibit_quit; | |
| 7075 struct gcpro gcpro1, gcpro2; | |
| 7076 | |
| 7077 /* We can't allow quits in here because that could cause the values | |
| 7078 of print_readably and print_escape_newlines to get screwed up. | |
| 7079 Normally we would use a record_unwind_protect but that would | |
| 7080 screw up the functioning of this function. */ | |
| 7081 Vinhibit_quit = Qt; | |
| 7082 | |
| 7083 entering_debugger = 0; | |
| 7084 | |
| 872 | 7085 if (!NILP (detailed)) |
| 7086 Vprint_level = make_int (50); | |
| 7087 else | |
| 7088 Vprint_level = make_int (3); | |
| 428 | 7089 print_readably = 0; |
| 7090 print_escape_newlines = 1; | |
| 7091 | |
| 7092 GCPRO2 (stream, old_level); | |
| 7093 | |
| 1261 | 7094 stream = canonicalize_printcharfun (stream); |
| 428 | 7095 |
| 7096 for (;;) | |
| 7097 { | |
| 7098 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7099 { | |
| 7100 int catchpdl = catches->pdlcount; | |
| 438 | 7101 if (speccount > catchpdl |
| 7102 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7103 /* This is a condition-case catchpoint */ |
| 7104 catchpdl = catchpdl + 1; | |
| 7105 | |
| 7106 backtrace_specials (speccount, catchpdl, stream); | |
| 7107 | |
| 7108 speccount = catches->pdlcount; | |
| 7109 if (catchpdl == speccount) | |
| 7110 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7111 write_ascstring (stream, " # (catch "); |
| 428 | 7112 Fprin1 (catches->tag, stream); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7113 write_ascstring (stream, " ...)\n"); |
| 428 | 7114 } |
| 7115 else | |
| 7116 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7117 write_ascstring (stream, " # (condition-case ... . "); |
| 428 | 7118 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7119 write_ascstring (stream, ")\n"); |
| 428 | 7120 } |
| 7121 catches = catches->next; | |
| 7122 } | |
| 7123 else if (!backlist) | |
| 7124 break; | |
| 7125 else | |
| 7126 { | |
| 7127 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7128 { | |
| 7129 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7130 speccount = backlist->pdlcount; | |
| 7131 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7132 write_ascstring (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7133 if (backlist->nargs == UNEVALLED) |
| 7134 { | |
| 1292 | 7135 Fprin1 (Fcons (*backlist->function, |
| 7136 backtrace_unevalled_args (backlist->args)), | |
| 7137 stream); | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7138 write_ascstring (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7139 } |
| 7140 else | |
| 7141 { | |
| 7142 Lisp_Object tem = *backlist->function; | |
| 7143 Fprin1 (tem, stream); /* This can QUIT */ | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7144 write_ascstring (stream, "("); |
| 428 | 7145 if (backlist->nargs == MANY) |
| 7146 { | |
| 7147 int i; | |
| 7148 Lisp_Object tail = Qnil; | |
| 7149 struct gcpro ngcpro1; | |
| 7150 | |
| 7151 NGCPRO1 (tail); | |
| 7152 for (tail = *backlist->args, i = 0; | |
| 7153 !NILP (tail); | |
| 7154 tail = Fcdr (tail), i++) | |
| 7155 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7156 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7157 Fprin1 (Fcar (tail), stream); |
| 7158 } | |
| 7159 NUNGCPRO; | |
| 7160 } | |
| 7161 else | |
| 7162 { | |
| 7163 int i; | |
| 7164 for (i = 0; i < backlist->nargs; i++) | |
| 7165 { | |
| 826 | 7166 if (!i && EQ (tem, Qbyte_code)) |
| 7167 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7168 write_ascstring (stream, "\"...\""); |
| 826 | 7169 continue; |
| 7170 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7171 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7172 Fprin1 (backlist->args[i], stream); |
| 7173 } | |
| 7174 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7175 write_ascstring (stream, ")\n"); |
| 428 | 7176 } |
| 7177 backlist = backlist->next; | |
| 7178 } | |
| 7179 } | |
| 7180 Vprint_level = old_level; | |
| 7181 print_readably = old_pr; | |
| 7182 print_escape_newlines = old_nl; | |
| 7183 UNGCPRO; | |
| 7184 Vinhibit_quit = oiq; | |
| 7185 return Qnil; | |
| 7186 } | |
| 7187 | |
| 7188 | |
| 444 | 7189 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7190 Return the function and arguments NFRAMES up from current execution point. | |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7191 If that frame has not evaluated the arguments yet (or involves a special |
|
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7192 operator), the value is (nil FUNCTION ARG-FORMS...). |
| 428 | 7193 If that frame has evaluated its arguments and called its function already, |
| 7194 the value is (t FUNCTION ARG-VALUES...). | |
| 7195 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7196 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7197 or a lambda expression for macro calls. | |
| 444 | 7198 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7199 */ |
| 7200 (nframes)) | |
| 7201 { | |
| 7202 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7203 REGISTER int i; | |
| 7204 Lisp_Object tem; | |
| 7205 | |
| 7206 CHECK_NATNUM (nframes); | |
| 7207 | |
| 7208 /* Find the frame requested. */ | |
| 7209 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7210 backlist = backlist->next; | |
| 7211 | |
| 7212 if (!backlist) | |
| 7213 return Qnil; | |
| 7214 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7215 return Fcons (Qnil, Fcons (*backlist->function, |
| 7216 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7217 else |
| 7218 { | |
| 7219 if (backlist->nargs == MANY) | |
| 7220 tem = *backlist->args; | |
| 7221 else | |
| 7222 tem = Flist (backlist->nargs, backlist->args); | |
| 7223 | |
| 7224 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7225 } | |
| 7226 } | |
| 7227 | |
| 7228 | |
| 7229 /************************************************************************/ | |
| 7230 /* Warnings */ | |
| 7231 /************************************************************************/ | |
| 7232 | |
| 1123 | 7233 static int |
| 7234 warning_will_be_discarded (Lisp_Object level) | |
| 7235 { | |
| 7236 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7237 to avoid excessive consing. */ | |
| 7238 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7239 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7240 } | |
| 7241 | |
| 428 | 7242 void |
| 1204 | 7243 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7244 Lisp_Object obj) |
| 7245 { | |
| 1123 | 7246 if (warning_will_be_discarded (level)) |
| 793 | 7247 return; |
| 1123 | 7248 |
| 1204 | 7249 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7250 if (NILP (Vpending_warnings)) |
| 7251 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7252 else | |
| 7253 { | |
| 7254 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7255 Vpending_warnings_tail = obj; | |
| 7256 } | |
| 7257 } | |
| 7258 | |
| 7259 /* #### This should probably accept Lisp objects; but then we have | |
| 7260 to make sure that Feval() isn't called, since it might not be safe. | |
| 7261 | |
| 7262 An alternative approach is to just pass some non-string type of | |
| 7263 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7264 automatically be called when it is safe to do so. */ | |
| 7265 | |
| 7266 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7267 warn_when_safe (Lisp_Object class_, Lisp_Object level, const Ascbyte *fmt, ...) |
| 428 | 7268 { |
| 7269 Lisp_Object obj; | |
| 7270 va_list args; | |
| 7271 | |
| 1123 | 7272 if (warning_will_be_discarded (level)) |
| 793 | 7273 return; |
| 1123 | 7274 |
| 428 | 7275 va_start (args, fmt); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7276 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 7277 va_end (args); |
| 7278 | |
| 1204 | 7279 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7280 } |
| 7281 | |
| 7282 | |
| 7283 | |
| 7284 | |
| 7285 /************************************************************************/ | |
| 7286 /* Initialization */ | |
| 7287 /************************************************************************/ | |
| 7288 | |
| 7289 void | |
| 7290 syms_of_eval (void) | |
| 7291 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
7292 INIT_LISP_OBJECT (subr); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
7293 INIT_LISP_OBJECT (multiple_value); |
| 442 | 7294 |
| 563 | 7295 DEFSYMBOL (Qinhibit_quit); |
| 7296 DEFSYMBOL (Qautoload); | |
| 7297 DEFSYMBOL (Qdebug_on_error); | |
| 7298 DEFSYMBOL (Qstack_trace_on_error); | |
| 7299 DEFSYMBOL (Qdebug_on_signal); | |
| 7300 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7301 DEFSYMBOL (Qdebugger); | |
| 7302 DEFSYMBOL (Qmacro); | |
| 428 | 7303 defsymbol (&Qand_rest, "&rest"); |
| 7304 defsymbol (&Qand_optional, "&optional"); | |
| 7305 /* Note that the process code also uses Qexit */ | |
| 563 | 7306 DEFSYMBOL (Qexit); |
| 7307 DEFSYMBOL (Qsetq); | |
| 7308 DEFSYMBOL (Qinteractive); | |
| 7309 DEFSYMBOL (Qcommandp); | |
| 7310 DEFSYMBOL (Qdefun); | |
| 7311 DEFSYMBOL (Qprogn); | |
| 7312 DEFSYMBOL (Qvalues); | |
| 7313 DEFSYMBOL (Qdisplay_warning); | |
| 7314 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7315 DEFSYMBOL (Qfinalize_list); |
| 563 | 7316 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7317 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7318 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7319 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7320 |
| 7321 DEFSUBR (For); | |
| 7322 DEFSUBR (Fand); | |
| 7323 DEFSUBR (Fif); | |
| 7324 DEFSUBR_MACRO (Fwhen); | |
| 7325 DEFSUBR_MACRO (Funless); | |
| 7326 DEFSUBR (Fcond); | |
| 7327 DEFSUBR (Fprogn); | |
| 7328 DEFSUBR (Fprog1); | |
| 7329 DEFSUBR (Fprog2); | |
| 7330 DEFSUBR (Fsetq); | |
| 7331 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7332 DEFSUBR (Fquote_maybe); |
| 428 | 7333 DEFSUBR (Ffunction); |
| 7334 DEFSUBR (Fdefun); | |
| 7335 DEFSUBR (Fdefmacro); | |
| 7336 DEFSUBR (Fdefvar); | |
| 7337 DEFSUBR (Fdefconst); | |
| 7338 DEFSUBR (Flet); | |
| 7339 DEFSUBR (FletX); | |
| 7340 DEFSUBR (Fwhile); | |
| 7341 DEFSUBR (Fmacroexpand_internal); | |
| 7342 DEFSUBR (Fcatch); | |
| 7343 DEFSUBR (Fthrow); | |
| 7344 DEFSUBR (Funwind_protect); | |
| 7345 DEFSUBR (Fcondition_case); | |
| 7346 DEFSUBR (Fcall_with_condition_handler); | |
| 7347 DEFSUBR (Fsignal); | |
| 7348 DEFSUBR (Finteractive_p); | |
| 7349 DEFSUBR (Fcommandp); | |
| 7350 DEFSUBR (Fcommand_execute); | |
| 7351 DEFSUBR (Fautoload); | |
| 7352 DEFSUBR (Feval); | |
| 7353 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7354 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7355 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7356 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7357 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7358 DEFSUBR (Fvalues_list); |
| 428 | 7359 DEFSUBR (Ffuncall); |
| 7360 DEFSUBR (Ffunctionp); | |
| 7361 DEFSUBR (Ffunction_min_args); | |
| 7362 DEFSUBR (Ffunction_max_args); | |
| 7363 DEFSUBR (Frun_hooks); | |
| 7364 DEFSUBR (Frun_hook_with_args); | |
| 7365 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7366 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7367 DEFSUBR (Fbacktrace_debug); | |
| 7368 DEFSUBR (Fbacktrace); | |
| 7369 DEFSUBR (Fbacktrace_frame); | |
| 7370 } | |
| 7371 | |
| 7372 void | |
| 814 | 7373 init_eval_semi_early (void) |
| 428 | 7374 { |
| 7375 specpdl_ptr = specpdl; | |
| 7376 specpdl_depth_counter = 0; | |
| 7377 catchlist = 0; | |
| 7378 Vcondition_handlers = Qnil; | |
| 7379 backtrace_list = 0; | |
| 7380 Vquit_flag = Qnil; | |
| 7381 debug_on_next_call = 0; | |
| 7382 lisp_eval_depth = 0; | |
| 7383 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7384 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7385 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7386 multiple_value_current_limit = 1; |
| 428 | 7387 } |
| 7388 | |
| 7389 void | |
| 7390 reinit_vars_of_eval (void) | |
| 7391 { | |
| 7392 preparing_for_armageddon = 0; | |
| 7393 in_warnings = 0; | |
| 7394 specpdl_size = 50; | |
| 7395 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7396 /* XEmacs change: increase these values. */ | |
| 7397 max_specpdl_size = 3000; | |
| 442 | 7398 max_lisp_eval_depth = 1000; |
| 7399 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7400 throw_level = 0; |
| 7401 #endif | |
| 2367 | 7402 init_eval_semi_early (); |
| 428 | 7403 } |
| 7404 | |
| 7405 void | |
| 7406 vars_of_eval (void) | |
| 7407 { | |
| 7408 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7409 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7410 */ ); | |
| 7411 | |
| 7412 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7413 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7414 This limit is to catch infinite recursions for you before they cause | |
| 7415 actual stack overflow in C, which would be fatal for Emacs. | |
| 7416 You can safely make it considerably larger than its default value, | |
| 7417 if that proves inconveniently small. | |
| 7418 */ ); | |
| 7419 | |
| 7420 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7421 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7422 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7423 Normally, you do not need to set this value yourself. It is set to | |
| 7424 t each time a Control-G is detected, and to `critical' each time a | |
| 7425 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7426 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7427 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7428 it's correct to do so. |
| 428 | 7429 */ ); |
| 7430 Vquit_flag = Qnil; | |
| 7431 | |
| 7432 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7433 Non-nil inhibits C-g quitting from happening immediately. | |
| 7434 Note that `quit-flag' will still be set by typing C-g, | |
| 7435 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7436 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7437 before making `inhibit-quit' nil. |
| 7438 | |
| 7439 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7440 requested by typing control-shift-G in a window-system frame; | |
| 7441 this is explained in more detail in `quit-flag'. | |
| 428 | 7442 */ ); |
| 7443 Vinhibit_quit = Qnil; | |
| 7444 | |
| 7445 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7446 *Non-nil means automatically display a backtrace buffer | |
| 7447 after any error that is not handled by a `condition-case'. | |
| 7448 If the value is a list, an error only means to display a backtrace | |
| 7449 if one of its condition symbols appears in the list. | |
| 7450 See also variable `stack-trace-on-signal'. | |
| 7451 */ ); | |
| 7452 Vstack_trace_on_error = Qnil; | |
| 7453 | |
| 7454 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7455 *Non-nil means automatically display a backtrace buffer | |
| 7456 after any error that is signalled, whether or not it is handled by | |
| 7457 a `condition-case'. | |
| 7458 If the value is a list, an error only means to display a backtrace | |
| 7459 if one of its condition symbols appears in the list. | |
| 7460 See also variable `stack-trace-on-error'. | |
| 7461 */ ); | |
| 7462 Vstack_trace_on_signal = Qnil; | |
| 7463 | |
| 7464 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7465 *List of errors for which the debugger should not be called. | |
| 7466 Each element may be a condition-name or a regexp that matches error messages. | |
| 7467 If any element applies to a given error, that error skips the debugger | |
| 7468 and just returns to top level. | |
| 7469 This overrides the variable `debug-on-error'. | |
| 7470 It does not apply to errors handled by `condition-case'. | |
| 7471 */ ); | |
| 7472 Vdebug_ignored_errors = Qnil; | |
| 7473 | |
| 7474 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7475 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7476 The debugger will not be entered if the error is handled by | |
| 7477 a `condition-case'. | |
| 7478 If the value is a list, an error only means to enter the debugger | |
| 7479 if one of its condition symbols appears in the list. | |
| 7480 This variable is overridden by `debug-ignored-errors'. | |
| 7481 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7482 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7483 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
|
7484 (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
|
7485 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
|
7486 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
|
7487 |
| 1123 | 7488 If this variable is set while XEmacs is running noninteractively (using |
| 7489 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7490 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7491 obviously won't work), XEmacs will break out to a C debugger using | |
| 7492 \(force-debugging-signal t). This is useful because debugging | |
| 7493 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7494 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7495 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7496 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7497 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7498 is about to die anyway, and if no debugger is present, this will usefully | |
| 7499 dump core.) The most useful way to set this flag when debugging | |
| 7500 noninteractive runs, especially in makefiles, is using the environment | |
| 7501 variable XEMACSDEBUG, like this: | |
| 771 | 7502 |
| 7503 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7504 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7505 */ ); |
| 7506 Vdebug_on_error = Qnil; | |
| 7507 | |
| 7508 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7509 *Non-nil means enter debugger if an error is signalled. | |
| 7510 The debugger will be entered whether or not the error is handled by | |
| 7511 a `condition-case'. | |
| 7512 If the value is a list, an error only means to enter the debugger | |
| 7513 if one of its condition symbols appears in the list. | |
| 7514 See also variable `debug-on-quit'. | |
| 1123 | 7515 |
| 7516 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7517 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7518 */ ); |
| 7519 Vdebug_on_signal = Qnil; | |
| 7520 | |
| 7521 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7522 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7523 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7524 debugger can also be achieved at any time (for X11 console) by typing | |
| 7525 control-shift-G to signal a critical quit. | |
| 7526 */ ); | |
| 7527 debug_on_quit = 0; | |
| 7528 | |
| 7529 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7530 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7531 */ ); | |
| 7532 | |
| 1292 | 7533 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7534 &backtrace_with_internal_sections /* | |
| 7535 Non-nil means backtraces will contain additional information indicating | |
| 7536 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7537 byte-char conversion, internal-external conversion, etc. This can be | |
| 7538 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7539 */ ); | |
| 7540 #ifdef ERROR_CHECK_STRUCTURES | |
| 7541 backtrace_with_internal_sections = 1; | |
| 7542 #else | |
| 7543 backtrace_with_internal_sections = 0; | |
| 7544 #endif | |
| 7545 | |
| 428 | 7546 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7547 Function to call to invoke debugger. | |
| 7548 If due to frame exit, args are `exit' and the value being returned; | |
| 7549 this function's value will be returned instead of that. | |
| 7550 If due to error, args are `error' and a list of the args to `signal'. | |
| 7551 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7552 If due to `eval' entry, one arg, t. | |
| 7553 */ ); | |
| 7554 Vdebugger = Qnil; | |
| 7555 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7556 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
|
7557 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
|
7558 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7559 This applies to `values', `values-list', `multiple-value-bind' and related |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
7560 macros and special operators. |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7561 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7562 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
|
7563 |
| 853 | 7564 staticpro (&Vcatch_everything_tag); |
| 7565 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7566 | |
| 428 | 7567 staticpro (&Vpending_warnings); |
| 7568 Vpending_warnings = Qnil; | |
| 1204 | 7569 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7570 Vpending_warnings_tail = Qnil; |
| 7571 | |
| 793 | 7572 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7573 Vlog_warning_minimum_level = Qinfo; | |
| 7574 | |
| 428 | 7575 staticpro (&Vautoload_queue); |
| 7576 Vautoload_queue = Qnil; | |
| 7577 | |
| 7578 staticpro (&Vcondition_handlers); | |
| 7579 | |
| 853 | 7580 staticpro (&Vdeletable_permanent_display_objects); |
| 7581 Vdeletable_permanent_display_objects = Qnil; | |
| 7582 | |
| 7583 staticpro (&Vmodifiable_buffers); | |
| 7584 Vmodifiable_buffers = Qnil; | |
| 7585 | |
| 7586 inhibit_flags = 0; | |
| 7587 } |