Mercurial > hg > xemacs-beta
annotate src/eval.c @ 5486:58e320bde005
Handle redisplay edge case.
With motion events when entering a frame and the minibuffer is
active, row and column can be zero, and there aren't any runes.
| author | Mike Kupfer <mike.kupfer@xemacs.org> |
|---|---|
| date | Sat, 30 Apr 2011 13:30:47 +0900 |
| parents | 0af042a0c116 |
| children | b0d87f92e60b |
| 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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419 |
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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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Support full Common Lisp multiple values in C.
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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Support #'function-arglist with built-in special forms.
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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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Support #'function-arglist with built-in special forms.
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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 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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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changeset
|
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
changeset
|
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>
parents:
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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>
parents:
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:
4693
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.
Aidan Kehoe <kehoea@parhasard.net>
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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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diff
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 } |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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parents:
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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
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|
1335 return expr; |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
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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diff
changeset
|
1359 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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parents:
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|
1360 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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|
1361 if (nargs != 1) |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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|
1362 { |
|
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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, |
|
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Error on too many arguments to #'function, #'quote.
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parents:
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diff
changeset
|
1364 list2 (Qfunction, make_int (nargs))); |
|
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Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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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|
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 |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
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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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|
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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|
1431 |
|
48b45a606961
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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|
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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parents:
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diff
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:
4686
diff
changeset
|
1640 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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_unsafe (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 |
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1807 throw_or_bomb_out_unsafe (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
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1808 Lisp_Object sig, Lisp_Object data) |
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1809 { |
| 428 | 1810 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1811 "last resort" when there is no handler for this error and | |
| 1812 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1813 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1814 initialization stages) we would get in an infinite recursive |
| 1815 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1816 really-early-error-handler. | |
| 1817 | |
| 1818 Note that in fact the only time that the "last resort" | |
| 3025 | 1819 occurs is when there's no catch for `top-level' -- the |
| 1820 `top-level' catch and the catch-all error handler are | |
| 428 | 1821 established at the same time, in initial_command_loop/ |
| 1822 top_level_1. | |
| 1823 | |
| 853 | 1824 [[#### Fix this horrifitude!]] |
| 1825 | |
| 1826 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1827 */ |
| 1828 | |
| 1829 while (1) | |
| 1830 { | |
| 1831 REGISTER struct catchtag *c; | |
| 1832 | |
| 1833 #if 0 /* FSFmacs */ | |
| 1834 if (!NILP (tag)) /* #### */ | |
| 1835 #endif | |
| 1836 for (c = catchlist; c; c = c->next) | |
| 1837 { | |
| 2532 | 1838 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1839 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1840 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1841 unwind_to_catch (c, val, tag); | |
| 428 | 1842 } |
| 1843 if (!bomb_out_p) | |
| 1844 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1845 else | |
| 1846 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1847 } | |
| 1848 } | |
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1849 |
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1850 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
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1851 Lisp_Object, Lisp_Object)); |
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1852 |
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1853 DOESNT_RETURN |
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1854 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
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1855 Lisp_Object sig, Lisp_Object data) |
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1856 { |
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1857 #ifdef DEFEND_AGAINST_THROW_RECURSION |
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1858 /* die if we recurse more than is reasonable */ |
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1859 assert (++throw_level <= 20); |
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1860 #endif |
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1861 |
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1862 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
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1863 check_proper_critical_section_nonlocal_exit_protection (); |
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1864 #endif |
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1865 throw_or_bomb_out_unsafe (tag, val, bomb_out_p, sig, data); |
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1866 } |
| 428 | 1867 |
| 1868 /* See above, where CATCHLIST is defined, for a description of how | |
| 1869 Fthrow() works. | |
| 1870 | |
| 1871 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1872 back to the appropriate condition-case handler after (maybe) | |
| 1873 the debugger is entered. In that case, TAG is the value | |
| 1874 of Vcondition_handlers that was in place just after the | |
| 1875 condition-case handler was set up. The car of this will be | |
| 1876 some data referring to the handler: Its car will be Qunbound | |
| 1877 (thus, this tag can never be generated by Lisp code), and | |
| 1878 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1879 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1880 This works fine because Fthrow() does not care what TAG was | |
| 1881 passed to it: it just looks up the catch list for something | |
| 1882 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1883 back to the place that established the catch (in this case, | |
| 1884 condition_case_1). See below for more info. | |
| 1885 */ | |
| 1886 | |
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1887 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1888 Throw to the catch for TAG and return VALUE from it. |
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1889 |
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1890 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1891 back. Tags are the same if and only if they are `eq'. |
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1892 |
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1893 arguments: (TAG VALUE) |
| 428 | 1894 */ |
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1895 (args)) |
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1896 { |
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1897 int nargs; |
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1898 Lisp_Object tag, value; |
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1899 |
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1900 GET_LIST_LENGTH (args, nargs); |
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1901 if (nargs != 2) |
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1902 { |
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1903 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1904 } |
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1905 |
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1906 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1907 |
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1908 value = Feval (XCAR (XCDR (args))); |
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1909 |
| 444 | 1910 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1911 RETURN_NOT_REACHED (Qnil); |
| 428 | 1912 } |
| 1913 | |
| 1914 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1915 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1916 If BODYFORM completes normally, its value is returned | |
| 1917 after executing the UNWINDFORMS. | |
| 1918 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
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1919 |
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1920 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1921 */ |
| 1922 (args)) | |
| 1923 { | |
| 1924 /* This function can GC */ | |
| 1925 int speccount = specpdl_depth(); | |
| 1926 | |
| 1927 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1928 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1929 } |
| 1930 | |
| 1931 | |
| 1932 /************************************************************************/ | |
| 1292 | 1933 /* Trapping errors */ |
| 428 | 1934 /************************************************************************/ |
| 1935 | |
| 1936 static Lisp_Object | |
| 1937 condition_bind_unwind (Lisp_Object loser) | |
| 1938 { | |
| 617 | 1939 /* There is no problem freeing stuff here like there is in |
| 1940 condition_case_unwind(), because there are no outside pointers | |
| 1941 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1942 |
| 428 | 1943 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1944 Lisp_Object tem = XCAR (loser); | |
| 853 | 1945 int first = 1; |
| 428 | 1946 |
| 1947 while (CONSP (tem)) | |
| 1948 { | |
| 853 | 1949 Lisp_Object victim = tem; |
| 1950 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1951 free_opaque_ptr (XCAR (victim)); | |
| 1952 first = 0; | |
| 1953 tem = XCDR (victim); | |
| 428 | 1954 free_cons (victim); |
| 1955 } | |
| 1956 | |
| 1957 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1958 Vcondition_handlers = XCDR (loser); |
| 1959 | |
| 1960 free_cons (loser); | |
| 428 | 1961 return Qnil; |
| 1962 } | |
| 1963 | |
| 1964 static Lisp_Object | |
| 1965 condition_case_unwind (Lisp_Object loser) | |
| 1966 { | |
| 1967 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1968 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1969 catch. With the recent changes to unwind_to_catch(), the | |
| 1970 evil situation might not happen any more; it certainly could | |
| 1971 happen before because it did. But it's very precarious to rely | |
| 1972 on something like this. #### Instead we should rewrite, adopting | |
| 1973 the FSF's mechanism with a struct handler instead of | |
| 1974 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1975 to hold all of the values, and there's no possibility either of | |
| 1976 crashes from freeing objects too quickly, or objects not getting | |
| 1977 freed and hanging around till the next GC. | |
| 1978 | |
| 1979 In practice, the extra consing here should not matter because | |
| 1980 it only happens when we throw past the condition-case, which almost | |
| 1981 always is the result of an error. Most of the time, there will be | |
| 1982 no error, and we will free the objects below in the main function. | |
| 1983 | |
| 1984 --ben | |
| 1985 | |
| 1986 DO NOT DO: free_cons (XCAR (loser)); | |
| 1987 */ | |
| 1988 | |
| 428 | 1989 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1990 Vcondition_handlers = XCDR (loser); |
| 1991 | |
| 1992 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1993 return Qnil; |
| 1994 } | |
| 1995 | |
| 1996 /* Split out from condition_case_3 so that primitive C callers | |
| 1997 don't have to cons up a lisp handler form to be evaluated. */ | |
| 1998 | |
| 1999 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 2000 specified by HANDLERS. If no error occurs that is indicated by | |
| 2001 HANDLERS as something to be caught, the return value of this | |
| 2002 function is the return value from BFUN. If such an error does | |
| 2003 occur, HFUN is called, and its return value becomes the | |
| 2004 return value of condition_case_1(). The second argument passed | |
| 2005 to HFUN will always be HARG. The first argument depends on | |
| 2006 HANDLERS: | |
| 2007 | |
| 2008 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 2009 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 2010 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 2011 arguments passed to `signal'. The debugger is not invoked even if | |
| 2012 `debug-on-error' was set. | |
| 2013 | |
| 2014 A HANDLERS value of Qerror is the same as Qt except that the | |
| 2015 debugger is invoked if `debug-on-error' was set. | |
| 2016 | |
| 2017 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 2018 exactly as in `condition-case', and errors will be trapped | |
| 2019 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 2020 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 2021 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 2022 | |
| 2023 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 2024 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 2025 for why), establishes a catch whose tag is this new value of | |
| 2026 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 2027 it calls Fthrow(), setting TAG to this same new value of | |
| 2028 Vcondition_handlers and setting VAL to the same thing that will | |
| 2029 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 2030 jump point we just established, and we in turn just call the | |
| 2031 HFUN and return its value. | |
| 2032 | |
| 2033 For a real condition-case, HFUN will always be | |
| 2034 run_condition_case_handlers() and HARG is the argument VAR | |
| 2035 to condition-case. That function just binds VAR to the cons | |
| 2036 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 2037 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 2038 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 2039 it had *before* condition_case_1() was called. This maintains | |
| 2040 consistency (so that the state of things at exit of | |
| 2041 condition_case_1() is the same as at entry), and implies | |
| 2042 that the handler can signal the same error again (possibly | |
| 2043 after processing of its own), without getting in an infinite | |
| 2044 loop. */ | |
| 2045 | |
| 2046 Lisp_Object | |
| 2047 condition_case_1 (Lisp_Object handlers, | |
| 2048 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 2049 Lisp_Object barg, | |
| 2050 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2051 Lisp_Object harg) | |
| 2052 { | |
| 2053 int speccount = specpdl_depth(); | |
| 2054 struct catchtag c; | |
| 617 | 2055 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2056 |
| 2057 #if 0 /* FSFmacs */ | |
| 2058 c.tag = Qnil; | |
| 2059 #else | |
| 2060 /* Do consing now so out-of-memory error happens up front */ | |
| 2061 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2062 which is known specially by Fsignal. | |
| 617 | 2063 [[ This is an abomination, but to fix it would require either |
| 428 | 2064 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2065 or changing the byte-compiler output (no thanks).]] |
| 2066 | |
| 2067 The above comment is clearly wrong. FSF does not do it this way | |
| 2068 and did not change the byte-compiler output. Instead they use a | |
| 2069 `struct handler' to hold the various values (in place of our | |
| 2070 Vcondition_handlers) and chain them together, with pointers from | |
| 2071 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2072 consider moving to something similar, but not before I merge my | |
| 2073 stderr-proc workspace, which contains changes to these | |
| 2074 functions. --ben */ | |
| 428 | 2075 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2076 Vcondition_handlers); | |
| 2077 #endif | |
| 2078 c.val = Qnil; | |
| 853 | 2079 c.actual_tag = Qnil; |
| 2532 | 2080 c.backtrace = Qnil; |
| 428 | 2081 c.backlist = backtrace_list; |
| 2082 #if 0 /* FSFmacs */ | |
| 2083 /* #### */ | |
| 2084 c.handlerlist = handlerlist; | |
| 2085 #endif | |
| 2086 c.lisp_eval_depth = lisp_eval_depth; | |
| 2087 c.pdlcount = specpdl_depth(); | |
| 2088 #if 0 /* FSFmacs */ | |
| 2089 c.poll_suppress_count = async_timer_suppress_count; | |
| 2090 #endif | |
| 2091 c.gcpro = gcprolist; | |
| 2092 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2093 c.next = catchlist; | |
| 2094 | |
| 2095 if (SETJMP (c.jmp)) | |
| 2096 { | |
| 2097 /* throw does ungcpro, etc */ | |
| 2098 return (*hfun) (c.val, harg); | |
| 2099 } | |
| 2100 | |
| 2101 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2102 | |
| 2103 catchlist = &c; | |
| 2104 #if 0 /* FSFmacs */ | |
| 2105 h.handler = handlers; | |
| 2106 h.var = Qnil; | |
| 2107 h.next = handlerlist; | |
| 2108 h.tag = &c; | |
| 2109 handlerlist = &h; | |
| 2110 #else | |
| 2111 Vcondition_handlers = c.tag; | |
| 2112 #endif | |
| 2113 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2114 c.val = ((*bfun) (barg)); | |
| 2115 UNGCPRO; | |
| 617 | 2116 |
| 2117 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2118 GCPRO3 (harg, c.val, c.tag); | |
| 2119 | |
| 428 | 2120 catchlist = c.next; |
| 853 | 2121 check_catchlist_sanity (); |
| 617 | 2122 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2123 delete this here. */ | |
| 428 | 2124 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2125 unbind_to (speccount); |
| 617 | 2126 |
| 2127 UNGCPRO; | |
| 2128 /* free the conses *after* the unbind, because the unbind will run | |
| 2129 condition_case_unwind above. */ | |
| 853 | 2130 free_cons (XCAR (c.tag)); |
| 2131 free_cons (c.tag); | |
| 617 | 2132 return c.val; |
| 428 | 2133 } |
| 2134 | |
| 2135 static Lisp_Object | |
| 2136 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2137 { | |
| 2138 /* This function can GC */ | |
| 2139 #if 0 /* FSFmacs */ | |
| 2140 if (!NILP (h.var)) | |
| 2141 specbind (h.var, c.val); | |
| 2142 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2143 | |
| 2144 /* Note that this just undoes the binding of h.var; whoever | |
| 2145 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2146 throwing. */ | |
| 771 | 2147 unbind_to (c.pdlcount); |
| 428 | 2148 return val; |
| 2149 #else | |
| 2150 int speccount; | |
| 2151 | |
| 2152 CHECK_TRUE_LIST (val); | |
| 2153 if (NILP (var)) | |
| 2154 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2155 | |
| 2156 speccount = specpdl_depth(); | |
| 2157 specbind (var, Fcar (val)); | |
| 2158 val = Fprogn (Fcdr (val)); | |
| 771 | 2159 return unbind_to_1 (speccount, val); |
| 428 | 2160 #endif |
| 2161 } | |
| 2162 | |
| 2163 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2164 condition-case except that it takes three arguments rather | |
| 2165 than a single list of arguments. */ | |
| 2166 Lisp_Object | |
| 2167 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2168 { | |
| 2169 /* This function can GC */ | |
| 2170 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2171 { | |
| 2172 if (NILP (handler)) | |
| 2173 ; | |
| 2174 else if (CONSP (handler)) | |
| 2175 { | |
| 2176 Lisp_Object conditions = XCAR (handler); | |
| 2177 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2178 if (SYMBOLP (conditions)) | |
| 2179 ; | |
| 2180 else | |
| 2181 { | |
| 2182 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2183 if (!SYMBOLP (condition)) | |
| 2184 goto invalid_condition_handler; | |
| 2185 } | |
| 2186 } | |
| 2187 else | |
| 2188 { | |
| 2189 invalid_condition_handler: | |
| 563 | 2190 sferror ("Invalid condition handler", handler); |
| 428 | 2191 } |
| 2192 } | |
| 2193 | |
| 2194 CHECK_SYMBOL (var); | |
| 2195 | |
| 2196 return condition_case_1 (handlers, | |
| 2197 Feval, bodyform, | |
| 2198 run_condition_case_handlers, | |
| 2199 var); | |
| 2200 } | |
| 2201 | |
| 2202 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2203 Regain control when an error is signalled. | |
| 2204 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2205 Executes BODYFORM and returns its value if no error happens. | |
| 2206 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2207 where the BODY is made of Lisp expressions. | |
| 2208 | |
| 771 | 2209 A typical usage of `condition-case' looks like this: |
| 2210 | |
| 2211 (condition-case nil | |
| 2212 ;; you need a progn here if you want more than one statement ... | |
| 2213 (progn | |
| 2214 (do-something) | |
| 2215 (do-something-else)) | |
| 2216 (error | |
| 2217 (issue-warning-or) | |
| 2218 ;; but strangely, you don't need one here. | |
| 2219 (return-a-value-etc) | |
| 2220 )) | |
| 2221 | |
| 428 | 2222 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2223 error's condition names. If an error happens, the first applicable | |
| 2224 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2225 all errors, even those without the `error' condition name on them | |
| 2226 \(e.g. `quit'). | |
| 2227 | |
| 2228 The car of a handler may be a list of condition names | |
| 2229 instead of a single condition name. | |
| 2230 | |
| 2231 When a handler handles an error, | |
| 2232 control returns to the condition-case and the handler BODY... is executed | |
| 2233 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2234 VAR may be nil; then you do not get access to the signal information. | |
| 2235 | |
| 2236 The value of the last BODY form is returned from the condition-case. | |
| 2237 See also the function `signal' for more info. | |
| 2238 | |
| 2239 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2240 and the current catches, condition-cases, and bindings have all been | |
| 2241 popped back to the state they were in just before the call to | |
| 2242 `condition-case'. This means that resignalling the error from | |
| 2243 within the handler will not result in an infinite loop. | |
| 2244 | |
| 2245 If you want to establish an error handler that is called with the | |
| 2246 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2247 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2248 */ | |
| 2249 (args)) | |
| 2250 { | |
| 2251 /* This function can GC */ | |
| 2252 Lisp_Object var = XCAR (args); | |
| 2253 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2254 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2255 return condition_case_3 (bodyform, var, handlers); | |
| 2256 } | |
| 2257 | |
| 2258 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
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changeset
|
2259 Call FUNCTION with arguments ARGS, regaining control on error. |
|
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parents:
4686
diff
changeset
|
2260 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
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4686
diff
changeset
|
2261 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2262 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2263 that was current when `signal' was called, rather than when the handler | |
| 2264 was established. | |
| 2265 | |
| 2266 HANDLER should be a function of one argument, which is a cons of the args | |
| 2267 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2268 `signal' is called (this differs from `condition-case', which allows | |
| 2269 you to specify which errors are trapped). If the handler function | |
| 2270 returns, `signal' continues as if the handler were never invoked. | |
| 2271 \(It continues to look for handlers established earlier than this one, | |
| 2272 and invokes the standard error-handler if none is found.) | |
|
4693
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diff
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|
2273 |
|
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4686
diff
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|
2274 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2275 */ |
| 2276 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2277 { | |
| 2278 /* This function can GC */ | |
| 2279 int speccount = specpdl_depth(); | |
| 2280 Lisp_Object tem; | |
| 2281 | |
| 853 | 2282 tem = Ffunction_max_args (args[0]); |
| 2283 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2284 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2285 invalid_argument ("Must be function of one argument", args[0]); | |
| 2286 | |
| 2287 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2288 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2289 record_unwind_protect (condition_bind_unwind, tem); | |
| 2290 Vcondition_handlers = tem; | |
| 2291 | |
| 2292 /* Caller should have GC-protected args */ | |
| 771 | 2293 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2294 } |
| 2295 | |
| 853 | 2296 /* This is the C version of the above function. It calls FUN, passing it |
| 2297 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2298 which they were signalled. (HANDLER is only invoked if there was no | |
| 2299 handler (either from condition-case or call-with-condition-handler) set | |
| 2300 later on that handled the signal; therefore, this is a real error. | |
| 2301 | |
| 2302 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2303 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2304 ARG be void * to facilitate passing structures, but I changed to | |
| 2305 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2306 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2307 to convert between Lisp_Objects and structure pointers. */ | |
| 2308 | |
| 2309 Lisp_Object | |
| 2310 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2311 Lisp_Object), | |
| 2312 Lisp_Object handler_arg, | |
| 2313 Lisp_Object (*fun) (Lisp_Object), | |
| 2314 Lisp_Object arg) | |
| 2315 { | |
| 2316 /* This function can GC */ | |
| 1111 | 2317 int speccount = specpdl_depth (); |
| 853 | 2318 Lisp_Object tem; |
| 2319 | |
| 2320 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2321 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2322 noseeum_cons (handler_arg, Qnil)), |
| 2323 Vcondition_handlers); | |
| 2324 record_unwind_protect (condition_bind_unwind, tem); | |
| 2325 Vcondition_handlers = tem; | |
| 2326 | |
| 2327 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2328 } | |
| 2329 | |
| 428 | 2330 static int |
| 2331 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2332 { | |
| 2333 if (EQ (type, Qt)) | |
| 2334 /* (condition-case c # (t c)) catches -all- signals | |
| 2335 * Use with caution! */ | |
| 2336 return 1; | |
| 2337 | |
| 2338 if (SYMBOLP (type)) | |
| 2339 return !NILP (Fmemq (type, conditions)); | |
| 2340 | |
| 2341 for (; CONSP (type); type = XCDR (type)) | |
| 2342 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2343 return 1; | |
| 2344 | |
| 2345 return 0; | |
| 2346 } | |
| 2347 | |
| 2348 static Lisp_Object | |
| 2349 return_from_signal (Lisp_Object value) | |
| 2350 { | |
| 2351 #if 1 | |
| 2352 /* Most callers are not prepared to handle gc if this | |
| 2353 returns. So, since this feature is not very useful, | |
| 2354 take it out. */ | |
| 2355 /* Have called debugger; return value to signaller */ | |
| 2356 return value; | |
| 2357 #else /* But the reality is that that stinks, because: */ | |
| 2358 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2359 to be continuable!! */ | |
| 563 | 2360 signal_error (Qunimplemented, |
| 2361 "Returning a value from an error is no longer supported", | |
| 2362 Qunbound); | |
| 428 | 2363 #endif |
| 2364 } | |
| 2365 | |
| 2366 | |
| 2367 /************************************************************************/ | |
| 2368 /* the workhorse error-signaling function */ | |
| 2369 /************************************************************************/ | |
| 2370 | |
| 853 | 2371 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2372 that won't get signalled for errors occurring when | |
| 2373 call_with_suspended_errors() was invoked. */ | |
| 2374 | |
| 872 | 2375 /* Don't make static or it might be compiled away */ |
| 2376 void signal_1 (void); | |
| 2377 | |
| 2378 void | |
| 853 | 2379 signal_1 (void) |
| 2380 { | |
| 2381 } | |
| 2382 | |
| 428 | 2383 /* #### This function has not been synched with FSF. It diverges |
| 2384 significantly. */ | |
| 2385 | |
| 853 | 2386 /* The simplest external error function: it would be called |
| 2387 signal_continuable_error() in the terminology below, but it's | |
| 2388 Lisp-callable. */ | |
| 2389 | |
| 2390 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2391 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2392 An error symbol is a symbol defined using `define-error'. | |
| 2393 DATA should be a list. Its elements are printed as part of the error message. | |
| 2394 If the signal is handled, DATA is made available to the handler. | |
| 2395 See also the function `signal-error', and the functions to handle errors: | |
| 2396 `condition-case' and `call-with-condition-handler'. | |
| 2397 | |
| 2398 Note that this function can return, if the debugger is invoked and the | |
| 2399 user invokes the "return from signal" option. | |
| 2400 */ | |
| 2401 (error_symbol, data)) | |
| 428 | 2402 { |
| 2403 /* This function can GC */ | |
| 853 | 2404 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2405 Lisp_Object conditions = Qnil; | |
| 2406 Lisp_Object handlers = Qnil; | |
| 428 | 2407 /* signal_call_debugger() could get called more than once |
| 2408 (once when a call-with-condition-handler is about to | |
| 2409 be dealt with, and another when a condition-case handler | |
| 2410 is about to be invoked). So make sure the debugger and/or | |
| 2411 stack trace aren't done more than once. */ | |
| 2412 int stack_trace_displayed = 0; | |
| 2413 int debugger_entered = 0; | |
| 853 | 2414 |
| 2415 /* Fsignal() is one of these functions that's called all the time | |
| 2416 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2417 protect the objects because all sorts of weird stuff could | |
| 2418 happen. */ | |
| 2419 | |
| 2420 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2421 | |
| 2422 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2423 signal_1 (); | |
| 428 | 2424 |
| 2425 if (!initialized) | |
| 2426 { | |
| 2427 /* who knows how much has been initialized? Safest bet is | |
| 2428 just to bomb out immediately. */ | |
| 771 | 2429 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2430 ABORT (); |
| 428 | 2431 } |
| 2432 | |
| 3092 | 2433 #ifndef NEW_GC |
| 1123 | 2434 assert (!gc_in_progress); |
| 3092 | 2435 #endif /* not NEW_GC */ |
| 1123 | 2436 |
| 2437 /* We abort if in_display and we are not protected, as garbage | |
| 2438 collections and non-local exits will invariably be fatal, but in | |
| 2439 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2440 */ | |
| 2441 | |
| 1318 | 2442 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2443 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2444 #endif |
| 428 | 2445 |
| 853 | 2446 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2447 |
| 2448 for (handlers = Vcondition_handlers; | |
| 2449 CONSP (handlers); | |
| 2450 handlers = XCDR (handlers)) | |
| 2451 { | |
| 2452 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2453 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2454 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2455 | |
| 2456 if (!UNBOUNDP (handler_fun)) | |
| 2457 { | |
| 2458 /* call-with-condition-handler */ | |
| 2459 Lisp_Object tem; | |
| 2460 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2461 struct gcpro ngcpro1; | |
| 2462 NGCPRO1 (all_handlers); | |
| 2463 Vcondition_handlers = outer_handlers; | |
| 2464 | |
| 853 | 2465 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2466 outer_handlers, 1, |
| 2467 &stack_trace_displayed, | |
| 2468 &debugger_entered); | |
| 2469 if (!UNBOUNDP (tem)) | |
| 2470 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2471 | |
| 853 | 2472 if (OPAQUE_PTRP (handler_fun)) |
| 2473 { | |
| 2474 if (NILP (handler_data)) | |
| 2475 { | |
| 2476 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2477 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2478 (get_opaque_ptr (handler_fun)); | |
| 2479 | |
| 2480 tem = (*hfun) (error_symbol, data); | |
| 2481 } | |
| 2482 else | |
| 2483 { | |
| 2484 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2485 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2486 (get_opaque_ptr (handler_fun)); | |
| 2487 | |
| 2488 assert (NILP (XCDR (handler_data))); | |
| 2489 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2490 } | |
| 2491 } | |
| 2492 else | |
| 2493 { | |
| 2494 tem = Fcons (error_symbol, data); | |
| 2495 if (NILP (handler_data)) | |
| 2496 tem = call1 (handler_fun, tem); | |
| 2497 else | |
| 2498 { | |
| 2499 /* (This code won't be used (for now?).) */ | |
| 2500 struct gcpro nngcpro1; | |
| 2501 Lisp_Object args[3]; | |
| 2502 NNGCPRO1 (args[0]); | |
| 2503 nngcpro1.nvars = 3; | |
| 2504 args[0] = handler_fun; | |
| 2505 args[1] = tem; | |
| 2506 args[2] = handler_data; | |
| 2507 nngcpro1.var = args; | |
| 2508 tem = Fapply (3, args); | |
| 2509 NNUNGCPRO; | |
| 2510 } | |
| 2511 } | |
| 428 | 2512 NUNGCPRO; |
| 2513 #if 0 | |
| 2514 if (!EQ (tem, Qsignal)) | |
| 2515 return return_from_signal (tem); | |
| 2516 #endif | |
| 2517 /* If handler didn't throw, try another handler */ | |
| 2518 Vcondition_handlers = all_handlers; | |
| 2519 } | |
| 2520 | |
| 2521 /* It's a condition-case handler */ | |
| 2522 | |
| 2523 /* t is used by handlers for all conditions, set up by C code. | |
| 2524 * debugger is not called even if debug_on_error */ | |
| 2525 else if (EQ (handler_data, Qt)) | |
| 2526 { | |
| 2527 UNGCPRO; | |
|
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parents:
4657
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|
2528 throw_or_bomb_out (handlers, Fcons (error_symbol, data), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2529 0, Qnil, Qnil); |
| 428 | 2530 } |
| 2531 /* `error' is used similarly to the way `t' is used, but in | |
| 2532 addition it invokes the debugger if debug_on_error. | |
| 2533 This is normally used for the outer command-loop error | |
| 2534 handler. */ | |
| 2535 else if (EQ (handler_data, Qerror)) | |
| 2536 { | |
| 853 | 2537 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2538 data, | |
| 428 | 2539 outer_handlers, 0, |
| 2540 &stack_trace_displayed, | |
| 2541 &debugger_entered); | |
| 2542 | |
| 2543 UNGCPRO; | |
| 2544 if (!UNBOUNDP (tem)) | |
| 2545 return return_from_signal (tem); | |
| 2546 | |
| 853 | 2547 tem = Fcons (error_symbol, data); |
|
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|
2548 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2549 } |
| 2550 else | |
| 2551 { | |
| 2552 /* handler established by real (Lisp) condition-case */ | |
| 2553 Lisp_Object h; | |
| 2554 | |
| 2555 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2556 { | |
| 2557 Lisp_Object clause = Fcar (h); | |
| 2558 Lisp_Object tem = Fcar (clause); | |
| 2559 | |
| 2560 if (condition_type_p (tem, conditions)) | |
| 2561 { | |
| 853 | 2562 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2563 outer_handlers, 1, |
| 2564 &stack_trace_displayed, | |
| 2565 &debugger_entered); | |
| 2566 UNGCPRO; | |
| 2567 if (!UNBOUNDP (tem)) | |
| 2568 return return_from_signal (tem); | |
| 2569 | |
| 2570 /* Doesn't return */ | |
| 853 | 2571 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause)); |
|
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|
2572 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2573 } |
| 2574 } | |
| 2575 } | |
| 2576 } | |
| 2577 | |
| 2578 /* If no handler is present now, try to run the debugger, | |
| 2579 and if that fails, throw to top level. | |
| 2580 | |
| 2581 #### The only time that no handler is present is during | |
| 2582 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2583 there is no `top-level' catch. (That's why the |
| 428 | 2584 "bomb-out" hack was added.) |
| 2585 | |
| 853 | 2586 [[#### Fix this horrifitude!]] |
| 2587 | |
| 2588 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2589 | |
| 2590 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2591 &stack_trace_displayed, |
| 2592 &debugger_entered); | |
| 2593 UNGCPRO; | |
| 853 | 2594 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2595 data); /* Doesn't return */ | |
| 2268 | 2596 RETURN_NOT_REACHED (Qnil); |
| 428 | 2597 } |
| 2598 | |
| 2599 /****************** Error functions class 1 ******************/ | |
| 2600 | |
| 2601 /* Class 1: General functions that signal an error. | |
| 2602 These functions take an error type and a list of associated error | |
| 2603 data. */ | |
| 2604 | |
| 853 | 2605 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2606 |
| 2607 /* Signal a non-continuable error. */ | |
| 2608 | |
| 2609 DOESNT_RETURN | |
| 563 | 2610 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2611 { |
| 2612 for (;;) | |
| 2613 Fsignal (sig, data); | |
| 2614 } | |
| 853 | 2615 |
| 2616 #ifdef ERROR_CHECK_CATCH | |
| 2617 | |
| 2618 void | |
| 2619 check_catchlist_sanity (void) | |
| 2620 { | |
| 2621 #if 0 | |
| 2622 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2623 bug! */ | |
| 442 | 2624 struct catchtag *c; |
| 2625 int found_error_tag = 0; | |
| 2626 | |
| 2627 for (c = catchlist; c; c = c->next) | |
| 2628 { | |
| 2629 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2630 { | |
| 2631 found_error_tag = 1; | |
| 2632 break; | |
| 2633 } | |
| 2634 } | |
| 2635 | |
| 2636 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2637 #endif /* vou me tomar no cul */ |
| 2638 } | |
| 2639 | |
| 2640 void | |
| 2641 check_specbind_stack_sanity (void) | |
| 2642 { | |
| 2643 } | |
| 2644 | |
| 2645 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2646 |
| 2647 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2648 according to ERRB. CLASS is the class of warning and should | |
| 2649 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2650 Qresource, etc.). */ | |
| 2651 | |
| 2652 void | |
| 1204 | 2653 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2654 Error_Behavior errb) |
| 428 | 2655 { |
| 2656 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2657 return; | |
| 793 | 2658 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2659 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2660 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2661 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2662 else |
|
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|
2663 signal_error_1 (sig, data); |
| 428 | 2664 } |
| 2665 | |
| 2666 /* Signal a continuable error or display a warning or do nothing, | |
| 2667 according to ERRB. */ | |
| 2668 | |
| 2669 Lisp_Object | |
| 563 | 2670 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2671 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2672 { |
| 2673 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2674 return Qnil; | |
| 793 | 2675 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2676 { | |
| 1204 | 2677 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2678 return Qnil; |
| 2679 } | |
| 428 | 2680 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2681 { | |
| 1204 | 2682 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2683 return Qnil; |
| 2684 } | |
| 2685 else | |
| 2686 return Fsignal (sig, data); | |
| 2687 } | |
| 2688 | |
| 2689 | |
| 2690 /****************** Error functions class 2 ******************/ | |
| 2691 | |
| 563 | 2692 /* Class 2: Signal an error with a string and an associated object. |
| 2693 Normally these functions are used to attach one associated object, | |
| 2694 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2695 than one object, make a list of the objects with Qunbound as the | |
| 2696 first element. (If you have specifically two objects to attach, | |
| 2697 consider using the function in class 3 below.) These functions | |
| 2698 signal an error of a specified type, whose data is one or more | |
| 2699 objects (usually two), a string the related Lisp object(s) | |
| 2700 specified as FROB. */ | |
| 2701 | |
| 2702 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2703 to signal_error_1(). */ | |
| 2704 | |
| 2705 Lisp_Object | |
|
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|
2706 build_error_data (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2707 { |
| 2708 if (EQ (frob, Qunbound)) | |
| 2709 frob = Qnil; | |
| 2710 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2711 frob = XCDR (frob); | |
| 2712 else | |
| 2713 frob = list1 (frob); | |
| 2714 if (!reason) | |
| 2715 return frob; | |
| 2716 else | |
| 771 | 2717 return Fcons (build_msg_string (reason), frob); |
| 563 | 2718 } |
| 2719 | |
| 2720 DOESNT_RETURN | |
|
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|
2721 signal_error (Lisp_Object type, const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2722 { |
| 2723 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2724 } | |
| 2725 | |
|
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|
2726 /* NOTE NOTE NOTE: If you feel you need signal_ierror() or something |
|
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|
2727 similar when reason is a non-ASCII message, you're probably doing |
|
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|
2728 something wrong. When you have an error message from an external |
|
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|
2729 source, you should put the error message as the first item in FROB and |
|
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|
2730 put a string in REASON indicating what you were doing when the error |
|
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|
2731 message occurred. Use signal_error_2() for such a case. */ |
|
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|
2732 |
| 563 | 2733 void |
|
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|
2734 maybe_signal_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2735 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2736 Error_Behavior errb) |
| 563 | 2737 { |
| 2738 /* Optimization: */ | |
| 2739 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2740 return; | |
| 1204 | 2741 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2742 } |
| 2743 | |
| 2744 Lisp_Object | |
|
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|
2745 signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2746 Lisp_Object frob) |
| 2747 { | |
| 2748 return Fsignal (type, build_error_data (reason, frob)); | |
| 2749 } | |
| 2750 | |
| 2751 Lisp_Object | |
|
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|
2752 maybe_signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2753 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2754 Error_Behavior errb) |
| 563 | 2755 { |
| 2756 /* Optimization: */ | |
| 2757 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2758 return Qnil; | |
| 2759 return maybe_signal_continuable_error_1 (type, | |
| 2760 build_error_data (reason, frob), | |
| 1204 | 2761 class_, errb); |
| 563 | 2762 } |
| 2763 | |
| 2764 | |
| 2765 /****************** Error functions class 3 ******************/ | |
| 2766 | |
| 2767 /* Class 3: Signal an error with a string and two associated objects. | |
| 2768 These functions signal an error of a specified type, whose data | |
| 2769 is three objects, a string and two related Lisp objects. | |
| 2770 (The equivalent could be accomplished using the class 2 functions, | |
| 2771 but these are more convenient in this particular case.) */ | |
| 2772 | |
| 2773 DOESNT_RETURN | |
|
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|
2774 signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2775 Lisp_Object frob0, Lisp_Object frob1) |
| 2776 { | |
| 771 | 2777 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2778 frob1)); |
| 2779 } | |
| 2780 | |
| 2781 void | |
|
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|
2782 maybe_signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2783 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2784 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2785 { |
| 2786 /* Optimization: */ | |
| 2787 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2788 return; | |
| 771 | 2789 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2790 frob1), class_, errb); |
| 563 | 2791 } |
| 2792 | |
| 2793 Lisp_Object | |
|
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|
2794 signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2795 Lisp_Object frob0, Lisp_Object frob1) |
| 2796 { | |
| 771 | 2797 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2798 frob1)); |
| 2799 } | |
| 2800 | |
| 2801 Lisp_Object | |
|
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|
2802 maybe_signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2803 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2804 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2805 { |
| 2806 /* Optimization: */ | |
| 2807 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2808 return Qnil; | |
| 2809 return maybe_signal_continuable_error_1 | |
| 771 | 2810 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2811 class_, errb); |
| 563 | 2812 } |
| 2813 | |
| 2814 | |
| 2815 /****************** Error functions class 4 ******************/ | |
| 2816 | |
| 2817 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2818 These functions signal an error of a specified type, whose data |
| 428 | 2819 is a single string, created using the arguments. */ |
| 2820 | |
| 2821 DOESNT_RETURN | |
|
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|
2822 signal_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 442 | 2823 { |
| 2824 Lisp_Object obj; | |
| 2825 va_list args; | |
| 2826 | |
| 2827 va_start (args, fmt); | |
|
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|
2828 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2829 va_end (args); |
| 2830 | |
| 2831 /* Fsignal GC-protects its args */ | |
| 563 | 2832 signal_error (type, 0, obj); |
| 442 | 2833 } |
| 2834 | |
| 2835 void | |
| 1204 | 2836 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
|
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|
2837 const Ascbyte *fmt, ...) |
| 442 | 2838 { |
| 2839 Lisp_Object obj; | |
| 2840 va_list args; | |
| 2841 | |
| 2842 /* Optimization: */ | |
| 2843 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2844 return; | |
| 2845 | |
| 2846 va_start (args, fmt); | |
|
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|
2847 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2848 va_end (args); |
| 2849 | |
| 2850 /* Fsignal GC-protects its args */ | |
| 1204 | 2851 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2852 } |
| 2853 | |
| 2854 Lisp_Object | |
|
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|
2855 signal_continuable_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 428 | 2856 { |
| 2857 Lisp_Object obj; | |
| 2858 va_list args; | |
| 2859 | |
| 2860 va_start (args, fmt); | |
|
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|
2861 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2862 va_end (args); |
| 2863 | |
| 2864 /* Fsignal GC-protects its args */ | |
| 2865 return Fsignal (type, list1 (obj)); | |
| 2866 } | |
| 2867 | |
| 2868 Lisp_Object | |
| 1204 | 2869 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
|
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|
2870 Error_Behavior errb, const Ascbyte *fmt, ...) |
| 442 | 2871 { |
| 2872 Lisp_Object obj; | |
| 2873 va_list args; | |
| 2874 | |
| 2875 /* Optimization: */ | |
| 2876 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2877 return Qnil; | |
| 2878 | |
| 2879 va_start (args, fmt); | |
|
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|
2880 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2881 va_end (args); |
| 2882 | |
| 2883 /* Fsignal GC-protects its args */ | |
| 1204 | 2884 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2885 } |
| 2886 | |
| 2887 | |
| 2888 /****************** Error functions class 5 ******************/ | |
| 2889 | |
| 563 | 2890 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2891 These functions signal an error of a specified type, whose data |
| 563 | 2892 is a one or more objects, a string (created using the arguments) |
| 2893 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2894 is the same as for class 2.) | |
| 2895 | |
| 2896 There is no need for a class 6 because you can always attach 2 | |
| 2897 objects using class 5 (for FROB, specify a list with three | |
| 2898 elements, the first of which is Qunbound), and these functions are | |
| 2899 not commonly used. | |
| 2900 */ | |
| 442 | 2901 |
| 2902 DOESNT_RETURN | |
|
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|
2903 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const Ascbyte *fmt, |
| 563 | 2904 ...) |
| 442 | 2905 { |
| 2906 Lisp_Object obj; | |
| 2907 va_list args; | |
| 2908 | |
| 2909 va_start (args, fmt); | |
|
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|
2910 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2911 va_end (args); |
| 2912 | |
| 2913 /* Fsignal GC-protects its args */ | |
| 563 | 2914 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2915 } |
| 2916 | |
| 2917 void | |
| 563 | 2918 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2919 Lisp_Object class_, Error_Behavior errb, |
|
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|
2920 const Ascbyte *fmt, ...) |
| 442 | 2921 { |
| 2922 Lisp_Object obj; | |
| 2923 va_list args; | |
| 2924 | |
| 2925 /* Optimization: */ | |
| 2926 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2927 return; | |
| 2928 | |
| 2929 va_start (args, fmt); | |
|
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|
2930 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2931 va_end (args); |
| 2932 | |
| 2933 /* Fsignal GC-protects its args */ | |
| 1204 | 2934 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2935 errb); |
| 428 | 2936 } |
| 2937 | |
| 2938 Lisp_Object | |
| 563 | 2939 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
|
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|
2940 const Ascbyte *fmt, ...) |
| 428 | 2941 { |
| 2942 Lisp_Object obj; | |
| 2943 va_list args; | |
| 2944 | |
| 2945 va_start (args, fmt); | |
|
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|
2946 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2947 va_end (args); |
| 2948 | |
| 2949 /* Fsignal GC-protects its args */ | |
| 563 | 2950 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2951 } |
| 2952 | |
| 2953 Lisp_Object | |
| 563 | 2954 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2955 Lisp_Object class_, |
| 578 | 2956 Error_Behavior errb, |
|
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|
2957 const Ascbyte *fmt, ...) |
| 428 | 2958 { |
| 2959 Lisp_Object obj; | |
| 2960 va_list args; | |
| 2961 | |
| 2962 /* Optimization: */ | |
| 2963 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2964 return Qnil; | |
| 2965 | |
| 2966 va_start (args, fmt); | |
|
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|
2967 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2968 va_end (args); |
| 2969 | |
| 2970 /* Fsignal GC-protects its args */ | |
| 563 | 2971 return maybe_signal_continuable_error_1 (type, |
| 2972 Fcons (obj, | |
| 2973 build_error_data (0, frob)), | |
| 1204 | 2974 class_, errb); |
| 428 | 2975 } |
| 2976 | |
| 2977 | |
| 2978 /* This is what the QUIT macro calls to signal a quit */ | |
| 2979 void | |
| 2980 signal_quit (void) | |
| 2981 { | |
| 853 | 2982 /* This function cannot GC. GC is prohibited because most callers do |
| 2983 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2984 --ben */ | |
| 2985 | |
| 2986 int count; | |
| 2987 | |
| 428 | 2988 if (EQ (Vquit_flag, Qcritical)) |
| 2989 debug_on_quit |= 2; /* set critical bit. */ | |
| 2990 Vquit_flag = Qnil; | |
| 853 | 2991 count = begin_gc_forbidden (); |
| 428 | 2992 /* note that this is continuable. */ |
| 2993 Fsignal (Qquit, Qnil); | |
| 853 | 2994 unbind_to (count); |
| 428 | 2995 } |
| 2996 | |
| 2997 | |
| 563 | 2998 /************************ convenience error functions ***********************/ |
| 2999 | |
| 436 | 3000 Lisp_Object |
| 428 | 3001 signal_void_function_error (Lisp_Object function) |
| 3002 { | |
| 436 | 3003 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 3004 } |
| 3005 | |
| 436 | 3006 Lisp_Object |
| 428 | 3007 signal_invalid_function_error (Lisp_Object function) |
| 3008 { | |
| 436 | 3009 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 3010 } |
| 3011 | |
| 436 | 3012 Lisp_Object |
| 428 | 3013 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 3014 { | |
| 436 | 3015 return Fsignal (Qwrong_number_of_arguments, |
| 3016 list2 (function, make_int (nargs))); | |
| 428 | 3017 } |
| 3018 | |
| 3019 /* Used in list traversal macros for efficiency. */ | |
| 436 | 3020 DOESNT_RETURN |
| 428 | 3021 signal_malformed_list_error (Lisp_Object list) |
| 3022 { | |
| 563 | 3023 signal_error (Qmalformed_list, 0, list); |
| 428 | 3024 } |
| 3025 | |
| 436 | 3026 DOESNT_RETURN |
| 428 | 3027 signal_malformed_property_list_error (Lisp_Object list) |
| 3028 { | |
| 563 | 3029 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 3030 } |
| 3031 | |
| 436 | 3032 DOESNT_RETURN |
| 428 | 3033 signal_circular_list_error (Lisp_Object list) |
| 3034 { | |
| 563 | 3035 signal_error (Qcircular_list, 0, list); |
| 428 | 3036 } |
| 3037 | |
| 436 | 3038 DOESNT_RETURN |
| 428 | 3039 signal_circular_property_list_error (Lisp_Object list) |
| 3040 { | |
| 563 | 3041 signal_error (Qcircular_property_list, 0, list); |
| 428 | 3042 } |
| 442 | 3043 |
| 2267 | 3044 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 3045 DOESNT_RETURN |
|
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|
3046 syntax_error (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3047 { |
| 563 | 3048 signal_error (Qsyntax_error, reason, frob); |
| 442 | 3049 } |
| 3050 | |
| 3051 DOESNT_RETURN | |
|
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|
3052 syntax_error_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3053 { |
| 563 | 3054 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 3055 } | |
| 3056 | |
| 3057 void | |
|
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|
3058 maybe_syntax_error (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3059 Lisp_Object class_, Error_Behavior errb) |
| 3060 { | |
| 3061 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3062 } |
| 3063 | |
| 3064 DOESNT_RETURN | |
|
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|
3065 sferror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3066 { |
| 3067 signal_error (Qstructure_formation_error, reason, frob); | |
| 3068 } | |
| 3069 | |
| 3070 DOESNT_RETURN | |
|
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|
3071 sferror_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3072 { |
| 3073 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3074 } | |
| 3075 | |
| 3076 void | |
|
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|
3077 maybe_sferror (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3078 Lisp_Object class_, Error_Behavior errb) |
| 3079 { | |
| 3080 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3081 } |
| 3082 | |
| 3083 DOESNT_RETURN | |
|
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|
3084 invalid_argument (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3085 { |
| 563 | 3086 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3087 } |
| 3088 | |
| 3089 DOESNT_RETURN | |
|
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|
3090 invalid_argument_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3091 Lisp_Object frob2) |
| 442 | 3092 { |
| 563 | 3093 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3094 } | |
| 3095 | |
| 3096 void | |
|
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|
3097 maybe_invalid_argument (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3098 Lisp_Object class_, Error_Behavior errb) |
| 3099 { | |
| 3100 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3101 } |
| 3102 | |
| 3103 DOESNT_RETURN | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
3104 invalid_keyword_argument (Lisp_Object function, Lisp_Object keyword) |
|
6afe991b8135
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Aidan Kehoe <kehoea@parhasard.net>
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5050
diff
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|
3105 { |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
3106 signal_error_1 (Qinvalid_keyword_argument, list2 (function, keyword)); |
|
6afe991b8135
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
3107 } |
|
6afe991b8135
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
3108 |
|
6afe991b8135
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Aidan Kehoe <kehoea@parhasard.net>
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|
3109 DOESNT_RETURN |
|
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|
3110 invalid_constant (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3111 { |
| 3112 signal_error (Qinvalid_constant, reason, frob); | |
| 3113 } | |
| 3114 | |
| 3115 DOESNT_RETURN | |
|
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|
3116 invalid_constant_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3117 Lisp_Object frob2) |
| 563 | 3118 { |
| 3119 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3120 } | |
| 3121 | |
| 3122 void | |
|
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|
3123 maybe_invalid_constant (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3124 Lisp_Object class_, Error_Behavior errb) |
| 3125 { | |
| 3126 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3127 } |
| 3128 | |
| 3129 DOESNT_RETURN | |
|
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|
3130 invalid_operation (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3131 { |
| 563 | 3132 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3133 } |
| 3134 | |
| 3135 DOESNT_RETURN | |
|
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|
3136 invalid_operation_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3137 Lisp_Object frob2) |
| 442 | 3138 { |
| 563 | 3139 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3140 } | |
| 3141 | |
| 3142 void | |
|
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|
3143 maybe_invalid_operation (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3144 Lisp_Object class_, Error_Behavior errb) |
| 3145 { | |
| 3146 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3147 } |
| 3148 | |
| 3149 DOESNT_RETURN | |
|
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|
3150 invalid_change (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3151 { |
| 563 | 3152 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3153 } |
| 3154 | |
| 3155 DOESNT_RETURN | |
|
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|
3156 invalid_change_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3157 { |
| 563 | 3158 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3159 } | |
| 3160 | |
| 3161 void | |
|
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|
3162 maybe_invalid_change (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3163 Lisp_Object class_, Error_Behavior errb) |
| 3164 { | |
| 3165 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3166 } |
| 3167 | |
| 3168 DOESNT_RETURN | |
|
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Ben Wing <ben@xemacs.org>
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|
3169 invalid_state (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3170 { |
| 3171 signal_error (Qinvalid_state, reason, frob); | |
| 3172 } | |
| 3173 | |
| 3174 DOESNT_RETURN | |
|
4952
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Ben Wing <ben@xemacs.org>
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|
3175 invalid_state_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3176 { |
| 3177 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3178 } | |
| 3179 | |
| 3180 void | |
|
4952
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Ben Wing <ben@xemacs.org>
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|
3181 maybe_invalid_state (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3182 Lisp_Object class_, Error_Behavior errb) |
| 3183 { | |
| 3184 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3185 } |
| 3186 | |
| 3187 DOESNT_RETURN | |
|
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Ben Wing <ben@xemacs.org>
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|
3188 wtaerror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3189 { |
| 3190 signal_error (Qwrong_type_argument, reason, frob); | |
| 3191 } | |
| 3192 | |
| 3193 DOESNT_RETURN | |
|
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Ben Wing <ben@xemacs.org>
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|
3194 stack_overflow (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3195 { |
| 3196 signal_error (Qstack_overflow, reason, frob); | |
| 3197 } | |
| 3198 | |
| 3199 DOESNT_RETURN | |
|
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|
3200 out_of_memory (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3201 { |
| 3202 signal_error (Qout_of_memory, reason, frob); | |
| 3203 } | |
| 3204 | |
| 428 | 3205 |
| 3206 /************************************************************************/ | |
| 3207 /* User commands */ | |
| 3208 /************************************************************************/ | |
| 3209 | |
| 3210 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3211 Return t if FUNCTION makes provisions for interactive calling. | |
| 3212 This means it contains a description for how to read arguments to give it. | |
| 3213 The value is nil for an invalid function or a symbol with no function | |
| 3214 definition. | |
| 3215 | |
| 3216 Interactively callable functions include | |
| 3217 | |
| 3218 -- strings and vectors (treated as keyboard macros) | |
| 3219 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3220 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3221 (i.e. the interactive flag) | |
| 3222 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3223 value | |
| 3224 -- subrs (built-in functions) that are interactively callable | |
| 3225 | |
| 3226 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3227 */ | |
| 3228 (function)) | |
| 3229 { | |
| 3230 Lisp_Object fun = indirect_function (function, 0); | |
| 3231 | |
| 3232 if (COMPILED_FUNCTIONP (fun)) | |
| 3233 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3234 | |
| 3235 /* Lists may represent commands. */ | |
| 3236 if (CONSP (fun)) | |
| 3237 { | |
| 3238 Lisp_Object funcar = XCAR (fun); | |
| 3239 if (EQ (funcar, Qlambda)) | |
| 3240 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3241 if (EQ (funcar, Qautoload)) | |
| 3242 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3243 else | |
| 3244 return Qnil; | |
| 3245 } | |
| 3246 | |
| 3247 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3248 interactive spec. */ | |
| 3249 if (SUBRP (fun)) | |
| 3250 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3251 | |
| 3252 /* Strings and vectors are keyboard macros. */ | |
| 3253 if (VECTORP (fun) || STRINGP (fun)) | |
| 3254 return Qt; | |
| 3255 | |
| 3256 /* Everything else (including Qunbound) is not a command. */ | |
| 3257 return Qnil; | |
| 3258 } | |
| 3259 | |
| 3260 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3261 Execute CMD as an editor command. | |
| 3262 CMD must be an object that satisfies the `commandp' predicate. | |
| 3263 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3264 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3265 when reading the arguments. | |
| 3266 */ | |
| 444 | 3267 (cmd, record_flag, keys)) |
| 428 | 3268 { |
| 3269 /* This function can GC */ | |
| 3270 Lisp_Object prefixarg; | |
| 3271 Lisp_Object final = cmd; | |
| 4162 | 3272 PROFILE_DECLARE(); |
| 428 | 3273 struct console *con = XCONSOLE (Vselected_console); |
| 3274 | |
| 3275 prefixarg = con->prefix_arg; | |
| 3276 con->prefix_arg = Qnil; | |
| 3277 Vcurrent_prefix_arg = prefixarg; | |
| 3278 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3279 | |
| 3280 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3281 return run_hook (Qdisabled_command_hook); |
| 428 | 3282 |
| 3283 for (;;) | |
| 3284 { | |
| 3285 final = indirect_function (cmd, 1); | |
| 3286 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3287 { |
| 3288 /* do_autoload GCPROs both arguments */ | |
| 3289 do_autoload (final, cmd); | |
| 3290 } | |
| 428 | 3291 else |
| 3292 break; | |
| 3293 } | |
| 3294 | |
| 3295 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3296 { | |
| 3297 backtrace.function = &Qcall_interactively; | |
| 3298 backtrace.args = &cmd; | |
| 3299 backtrace.nargs = 1; | |
| 3300 backtrace.evalargs = 0; | |
| 1292 | 3301 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3302 backtrace.debug_on_exit = 0; |
| 1292 | 3303 backtrace.function_being_called = 0; |
| 428 | 3304 PUSH_BACKTRACE (backtrace); |
| 3305 | |
| 1292 | 3306 PROFILE_ENTER_FUNCTION (); |
| 444 | 3307 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3308 PROFILE_EXIT_FUNCTION (); |
| 428 | 3309 |
| 3310 POP_BACKTRACE (backtrace); | |
| 3311 return final; | |
| 3312 } | |
| 3313 else if (STRINGP (final) || VECTORP (final)) | |
| 3314 { | |
| 3315 return Fexecute_kbd_macro (final, prefixarg); | |
| 3316 } | |
| 3317 else | |
| 3318 { | |
| 3319 Fsignal (Qwrong_type_argument, | |
| 3320 Fcons (Qcommandp, | |
| 3321 (EQ (cmd, final) | |
| 3322 ? list1 (cmd) | |
| 3323 : list2 (cmd, final)))); | |
| 3324 return Qnil; | |
| 3325 } | |
| 3326 } | |
| 3327 | |
| 3328 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3329 Return t if function in which this appears was called interactively. | |
| 3330 This means that the function was called with call-interactively (which | |
| 3331 includes being called as the binding of a key) | |
| 3332 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3333 */ | |
| 3334 ()) | |
| 3335 { | |
| 3336 REGISTER struct backtrace *btp; | |
| 3337 REGISTER Lisp_Object fun; | |
| 3338 | |
| 3339 if (!INTERACTIVE) | |
| 3340 return Qnil; | |
| 3341 | |
| 3342 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3343 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3344 function). Note that *btp->function may be a symbol pointing at a | |
| 3345 compiled function. */ | |
| 3346 btp = backtrace_list; | |
| 3347 | |
| 3348 #if 0 /* FSFmacs */ | |
| 3349 | |
| 3350 /* #### FSFmacs does the following instead. I can't figure | |
| 3351 out which one is more correct. */ | |
| 3352 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3353 the top for Finteractive_p itself. If so, skip it. */ | |
| 3354 fun = Findirect_function (*btp->function); | |
| 3355 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3356 btp = btp->next; | |
| 3357 | |
| 3358 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3359 may be a frame for Fbyte_code. Now, given the strictest | |
| 3360 definition, this function isn't really being called | |
| 3361 interactively, but because that's the way Emacs 18 always builds | |
| 3362 byte-compiled functions, we'll accept it for now. */ | |
| 3363 if (EQ (*btp->function, Qbyte_code)) | |
| 3364 btp = btp->next; | |
| 3365 | |
| 3366 /* 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
|
3367 looking at several frames for special operators. Skip past them. */ |
| 428 | 3368 while (btp && |
| 3369 btp->nargs == UNEVALLED) | |
| 3370 btp = btp->next; | |
| 3371 | |
| 3372 #else | |
| 3373 | |
| 3374 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3375 btp = btp->next; | |
| 3376 for (; | |
| 3377 btp && (btp->nargs == UNEVALLED | |
| 3378 || EQ (*btp->function, Qbyte_code)); | |
| 3379 btp = btp->next) | |
| 3380 {} | |
| 3381 /* btp now points at the frame of the innermost function | |
| 3382 that DOES eval its args. | |
| 3383 If it is a built-in function (such as load or eval-region) | |
| 3384 return nil. */ | |
| 3385 /* Beats me why this is necessary, but it is */ | |
| 3386 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3387 return Qt; | |
| 3388 | |
| 3389 #endif | |
| 3390 | |
| 3391 fun = Findirect_function (*btp->function); | |
| 3392 if (SUBRP (fun)) | |
| 3393 return Qnil; | |
| 3394 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3395 Return t if that function was called interactively. */ | |
| 3396 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3397 return Qt; | |
| 3398 return Qnil; | |
| 3399 } | |
| 3400 | |
| 3401 | |
| 3402 /************************************************************************/ | |
| 3403 /* Autoloading */ | |
| 3404 /************************************************************************/ | |
| 3405 | |
| 3406 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3407 Define FUNCTION to autoload from FILENAME. |
| 3408 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3409 The remaining optional arguments provide additional info about the | |
| 3410 real definition. | |
| 3411 DOCSTRING is documentation for FUNCTION. | |
| 3412 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3413 TYPE indicates the type of the object: | |
| 428 | 3414 nil or omitted says FUNCTION is a function, |
| 3415 `keymap' says FUNCTION is really a keymap, and | |
| 3416 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3417 If FUNCTION already has a non-void function definition that is not an |
| 3418 autoload object, this function does nothing and returns nil. | |
| 428 | 3419 */ |
| 444 | 3420 (function, filename, docstring, interactive, type)) |
| 428 | 3421 { |
| 3422 /* This function can GC */ | |
| 3423 CHECK_SYMBOL (function); | |
| 444 | 3424 CHECK_STRING (filename); |
| 428 | 3425 |
| 3426 /* If function is defined and not as an autoload, don't override */ | |
| 3427 { | |
| 3428 Lisp_Object f = XSYMBOL (function)->function; | |
| 3429 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3430 return Qnil; | |
| 3431 } | |
| 3432 | |
| 3433 if (purify_flag) | |
| 3434 { | |
| 3435 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3436 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3437 } |
| 440 | 3438 |
| 444 | 3439 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3440 docstring, |
| 3441 interactive, | |
| 3442 type))); | |
| 3443 } | |
| 3444 | |
| 3445 Lisp_Object | |
| 3446 un_autoload (Lisp_Object oldqueue) | |
| 3447 { | |
| 3448 /* This function can GC */ | |
| 3449 REGISTER Lisp_Object queue, first, second; | |
| 3450 | |
| 3451 /* Queue to unwind is current value of Vautoload_queue. | |
| 3452 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3453 queue = Vautoload_queue; | |
| 3454 Vautoload_queue = oldqueue; | |
| 3455 while (CONSP (queue)) | |
| 3456 { | |
| 3457 first = XCAR (queue); | |
| 3458 second = Fcdr (first); | |
| 3459 first = Fcar (first); | |
| 3460 if (NILP (second)) | |
| 3461 Vfeatures = first; | |
| 3462 else | |
| 3463 Ffset (first, second); | |
| 3464 queue = Fcdr (queue); | |
| 3465 } | |
| 3466 return Qnil; | |
| 3467 } | |
| 3468 | |
| 970 | 3469 /* do_autoload GCPROs both arguments */ |
| 428 | 3470 void |
| 3471 do_autoload (Lisp_Object fundef, | |
| 3472 Lisp_Object funname) | |
| 3473 { | |
| 3474 /* This function can GC */ | |
| 3475 int speccount = specpdl_depth(); | |
| 3476 Lisp_Object fun = funname; | |
| 970 | 3477 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3478 |
| 3479 CHECK_SYMBOL (funname); | |
| 970 | 3480 GCPRO3 (fundef, funname, fun); |
| 428 | 3481 |
| 3482 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3483 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3484 Vautoload_queue = Qt; | |
| 3485 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3486 | |
| 3487 { | |
| 3488 Lisp_Object queue; | |
| 3489 | |
| 3490 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3491 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3492 { | |
| 3493 Lisp_Object first = XCAR (queue); | |
| 3494 Lisp_Object second = Fcdr (first); | |
| 3495 | |
| 3496 first = Fcar (first); | |
| 3497 | |
| 3498 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3499 may be an atom if the autoload entry was generated by a defalias | |
| 3500 or fset. */ | |
| 3501 if (CONSP (second)) | |
| 3502 Fput (first, Qautoload, (XCDR (second))); | |
| 3503 } | |
| 3504 } | |
| 3505 | |
| 3506 /* Once loading finishes, don't undo it. */ | |
| 3507 Vautoload_queue = Qt; | |
| 771 | 3508 unbind_to (speccount); |
| 428 | 3509 |
| 3510 fun = indirect_function (fun, 0); | |
| 3511 | |
| 3512 #if 0 /* FSFmacs */ | |
| 3513 if (!NILP (Fequal (fun, fundef))) | |
| 3514 #else | |
| 3515 if (UNBOUNDP (fun) | |
| 3516 || (CONSP (fun) | |
| 3517 && EQ (XCAR (fun), Qautoload))) | |
| 3518 #endif | |
| 563 | 3519 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3520 UNGCPRO; |
| 3521 } | |
| 3522 | |
| 3523 | |
| 3524 /************************************************************************/ | |
| 3525 /* eval, funcall, apply */ | |
| 3526 /************************************************************************/ | |
| 3527 | |
| 814 | 3528 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3529 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3530 -- in particular, the calling of subrs and compiled functions, the most | |
| 3531 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3532 to do to squeeze more speed out except by switching to lexical | |
| 3533 variables, which would eliminate the specbind loop. (But the real gain | |
| 3534 from lexical variables would come from better optimization -- with | |
| 3535 dynamic binding, you have the constant problem that any function call | |
| 3536 that you haven't explicitly proven to be side-effect-free might | |
| 3537 potentially side effect your local variables, which makes optimization | |
| 3538 extremely difficult when there are function calls anywhere in a chunk of | |
| 3539 code to be optimized. Even worse, you don't know that *your* local | |
| 3540 variables aren't side-effecting an outer function's local variables, so | |
| 3541 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3542 | |
| 428 | 3543 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3544 int nargs, Lisp_Object args[]); |
| 428 | 3545 static int in_warnings; |
| 3546 | |
| 3547 | |
| 814 | 3548 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3549 int nargs, | |
| 3550 Lisp_Object args[]); | |
| 3551 | |
| 3552 /* The theory behind making this a separate function is to shrink | |
| 3553 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3554 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3555 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3556 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3557 | |
| 3558 void | |
| 3559 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3560 Lisp_Object args[]) | |
| 3561 { | |
| 3562 REGISTER int i = 0; | |
| 3563 int max_non_rest_args = f->args_in_array - 1; | |
| 3564 int bindargs = min (nargs, max_non_rest_args); | |
| 3565 | |
| 3566 for (i = 0; i < bindargs; i++) | |
| 3092 | 3567 #ifdef NEW_GC |
| 3568 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3569 args[i]); | |
| 3570 #else /* not NEW_GC */ | |
| 814 | 3571 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3572 #endif /* not NEW_GC */ |
| 814 | 3573 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3574 #ifdef NEW_GC |
| 3575 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3576 Qnil); | |
| 3577 #else /* not NEW_GC */ | |
| 814 | 3578 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3579 #endif /* not NEW_GC */ |
| 3580 #ifdef NEW_GC | |
| 3581 SPECBIND_FAST_UNSAFE | |
| 3582 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3583 nargs > max_non_rest_args ? | |
| 3584 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3585 Qnil); | |
| 3586 #else /* not NEW_GC */ | |
| 814 | 3587 SPECBIND_FAST_UNSAFE |
| 3588 (f->args[max_non_rest_args], | |
| 3589 nargs > max_non_rest_args ? | |
| 3590 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3591 Qnil); | |
| 3092 | 3592 #endif /* not NEW_GC */ |
| 814 | 3593 } |
| 3594 | |
| 3595 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3596 in ARGS, and return the result of evaluation. */ | |
| 3597 inline static Lisp_Object | |
| 3598 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3599 { | |
| 3600 /* This function can GC */ | |
| 3601 int speccount = specpdl_depth(); | |
| 3602 REGISTER int i = 0; | |
| 3603 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3604 | |
| 3605 if (!OPAQUEP (f->instructions)) | |
| 3606 /* Lazily munge the instructions into a more efficient form */ | |
| 3607 optimize_compiled_function (fun); | |
| 3608 | |
| 3609 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3610 the required space on the specbinding stack for binding the args | |
| 3611 and local variables of fun. So just reserve it once. */ | |
| 3612 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3613 | |
| 3614 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3615 optional arguments. */ | |
| 3616 { | |
| 3617 #if 1 | |
| 3618 for (i = 0; i < nargs; i++) | |
| 3092 | 3619 #ifdef NEW_GC |
| 3620 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3621 args[i]); | |
| 3622 #else /* not NEW_GC */ | |
| 814 | 3623 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3624 #endif /* not NEW_GC */ |
| 814 | 3625 #else |
| 3626 /* Here's an alternate way to write the loop that tries to further | |
| 3627 optimize funcalls for functions with few arguments by partially | |
| 3628 unrolling the loop. It's not clear whether this is a win since it | |
| 3629 increases the size of the function and the possibility of L1 cache | |
| 3630 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3631 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3632 compiler repeatedly and looking at the total time, show very | |
| 3633 little difference between the simple loop above, the unrolled code | |
| 3634 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3635 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3636 because it's smaller. */ | |
| 3637 switch (nargs) | |
| 3638 { | |
| 3639 default: | |
| 3640 for (i = nargs - 1; i >= 4; i--) | |
| 3641 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3642 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3643 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3644 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3645 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3646 case 0: break; | |
| 3647 } | |
| 3648 #endif | |
| 3649 } | |
| 3650 else if (nargs < f->min_args) | |
| 3651 goto wrong_number_of_arguments; | |
| 3652 else if (nargs < f->max_args) | |
| 3653 { | |
| 3654 for (i = 0; i < nargs; i++) | |
| 3092 | 3655 #ifdef NEW_GC |
| 3656 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3657 args[i]); | |
| 3658 #else /* not NEW_GC */ | |
| 814 | 3659 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3660 #endif /* not NEW_GC */ |
| 814 | 3661 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3662 #ifdef NEW_GC |
| 3663 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3664 Qnil); | |
| 3665 #else /* not NEW_GC */ | |
| 814 | 3666 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3667 #endif /* not NEW_GC */ |
| 814 | 3668 } |
| 3669 else if (f->max_args == MANY) | |
| 3670 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3671 else | |
| 3672 { | |
| 3673 wrong_number_of_arguments: | |
| 3674 /* The actual printed compiled_function object is incomprehensible. | |
| 3675 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3676 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3677 fun = *backtrace_list->function; | |
| 3678 return Fsignal (Qwrong_number_of_arguments, | |
| 3679 list2 (fun, make_int (nargs))); | |
| 3680 } | |
| 3681 | |
| 3682 { | |
| 3683 Lisp_Object value = | |
| 3684 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
|
3685 #ifdef ERROR_CHECK_BYTE_CODE |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3686 XOPAQUE_SIZE (f->instructions) / |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3687 sizeof (Opbyte), |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3688 #endif |
| 814 | 3689 f->stack_depth, |
| 3690 XVECTOR_DATA (f->constants)); | |
| 3691 | |
| 3692 /* The attempt to optimize this by only unbinding variables failed | |
| 3693 because using buffer-local variables as function parameters | |
| 3694 leads to specpdl_ptr->func != 0 */ | |
| 3695 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3696 UNBIND_TO_GCPRO (speccount, value); | |
| 3697 return value; | |
| 3698 } | |
| 3699 } | |
| 3700 | |
| 428 | 3701 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3702 Evaluate FORM and return its value. | |
| 3703 */ | |
| 3704 (form)) | |
| 3705 { | |
| 3706 /* This function can GC */ | |
| 3707 Lisp_Object fun, val, original_fun, original_args; | |
| 3708 int nargs; | |
| 4162 | 3709 PROFILE_DECLARE(); |
| 428 | 3710 |
| 1318 | 3711 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3712 check_proper_critical_section_lisp_protection (); | |
| 3713 #endif | |
| 3714 | |
| 3989 | 3715 if (!CONSP (form)) |
| 3716 { | |
| 3717 if (SYMBOLP (form)) | |
| 3718 { | |
| 3719 return Fsymbol_value (form); | |
| 3720 } | |
| 3721 | |
| 3722 return form; | |
| 3723 } | |
| 3724 | |
| 428 | 3725 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3726 while (!in_warnings && !NILP (Vpending_warnings) |
| 3727 /* well, perhaps not so safe after all! */ | |
| 3728 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3729 { |
| 3730 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3731 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3732 int speccount = internal_bind_int (&in_warnings, 1); |
| 3733 | |
| 428 | 3734 this_warning_cons = Vpending_warnings; |
| 3735 this_warning = XCAR (this_warning_cons); | |
| 3736 /* in case an error occurs in the warn function, at least | |
| 3737 it won't happen infinitely */ | |
| 3738 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3739 free_cons (this_warning_cons); |
| 1204 | 3740 class_ = XCAR (this_warning); |
| 428 | 3741 level = XCAR (XCDR (this_warning)); |
| 3742 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3743 free_list (this_warning); | |
| 3744 | |
| 3745 if (NILP (Vpending_warnings)) | |
| 3746 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3747 but safer */ | |
| 3748 | |
| 1204 | 3749 GCPRO4 (form, class_, level, messij); |
| 428 | 3750 if (!STRINGP (messij)) |
| 3751 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3752 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3753 UNGCPRO; |
| 771 | 3754 unbind_to (speccount); |
| 428 | 3755 } |
| 3756 | |
| 3757 QUIT; | |
| 814 | 3758 if (need_to_garbage_collect) |
| 428 | 3759 { |
| 3760 struct gcpro gcpro1; | |
| 3761 GCPRO1 (form); | |
| 3092 | 3762 #ifdef NEW_GC |
| 3763 gc_incremental (); | |
| 3764 #else /* not NEW_GC */ | |
| 428 | 3765 garbage_collect_1 (); |
| 3092 | 3766 #endif /* not NEW_GC */ |
| 428 | 3767 UNGCPRO; |
| 3768 } | |
| 3769 | |
| 3770 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3771 { | |
| 3772 if (max_lisp_eval_depth < 100) | |
| 3773 max_lisp_eval_depth = 100; | |
| 3774 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3775 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3776 Qunbound); | |
| 428 | 3777 } |
| 3778 | |
| 3779 /* We guaranteed CONSP (form) above */ | |
| 3780 original_fun = XCAR (form); | |
| 3781 original_args = XCDR (form); | |
| 3782 | |
| 3783 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3784 | |
| 3785 backtrace.pdlcount = specpdl_depth(); | |
| 3786 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3787 backtrace.args = &original_args; | |
| 3788 backtrace.nargs = UNEVALLED; | |
| 3789 backtrace.evalargs = 1; | |
| 3790 backtrace.debug_on_exit = 0; | |
| 1292 | 3791 backtrace.function_being_called = 0; |
| 428 | 3792 PUSH_BACKTRACE (backtrace); |
| 3793 | |
| 3794 if (debug_on_next_call) | |
| 3795 do_debug_on_call (Qt); | |
| 3796 | |
| 3797 /* At this point, only original_fun and original_args | |
| 3798 have values that will be used below. */ | |
| 3799 retry: | |
| 3989 | 3800 /* Optimise for no indirection. */ |
| 3801 fun = original_fun; | |
| 3802 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3803 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3804 { | |
| 3805 fun = indirect_function(original_fun, 1); | |
| 3806 } | |
| 428 | 3807 |
| 3808 if (SUBRP (fun)) | |
| 3809 { | |
| 3810 Lisp_Subr *subr = XSUBR (fun); | |
| 3811 int max_args = subr->max_args; | |
| 3812 | |
| 3813 if (nargs < subr->min_args) | |
| 3814 goto wrong_number_of_arguments; | |
| 3815 | |
| 3816 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3817 { | |
| 3818 backtrace.evalargs = 0; | |
| 1292 | 3819 PROFILE_ENTER_FUNCTION (); |
| 428 | 3820 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3821 (original_args)); | |
| 1292 | 3822 PROFILE_EXIT_FUNCTION (); |
| 428 | 3823 } |
| 3824 else if (nargs <= max_args) | |
| 3825 { | |
| 3826 struct gcpro gcpro1; | |
| 3827 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3828 REGISTER Lisp_Object *p = args; | |
| 3829 | |
| 3830 GCPRO1 (args[0]); | |
| 3831 gcpro1.nvars = 0; | |
| 3832 | |
| 3833 { | |
| 3834 LIST_LOOP_2 (arg, original_args) | |
| 3835 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3836 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3837 gcpro1.nvars++; |
| 3838 } | |
| 3839 } | |
| 3840 | |
| 3841 /* &optional args default to nil. */ | |
| 3842 while (p - args < max_args) | |
| 3843 *p++ = Qnil; | |
| 3844 | |
| 3845 backtrace.args = args; | |
| 3846 backtrace.nargs = nargs; | |
| 3847 | |
| 1292 | 3848 PROFILE_ENTER_FUNCTION (); |
| 428 | 3849 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3850 PROFILE_EXIT_FUNCTION (); |
| 428 | 3851 |
| 3852 UNGCPRO; | |
| 3853 } | |
| 3854 else if (max_args == MANY) | |
| 3855 { | |
| 3856 /* Pass a vector of evaluated arguments */ | |
| 3857 struct gcpro gcpro1; | |
| 3858 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3859 REGISTER Lisp_Object *p = args; | |
| 3860 | |
| 3861 GCPRO1 (args[0]); | |
| 3862 gcpro1.nvars = 0; | |
| 3863 | |
| 3864 { | |
| 3865 LIST_LOOP_2 (arg, original_args) | |
| 3866 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3867 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3868 gcpro1.nvars++; |
| 3869 } | |
| 3870 } | |
| 3871 | |
| 3872 backtrace.args = args; | |
| 3873 backtrace.nargs = nargs; | |
| 3874 | |
| 1292 | 3875 PROFILE_ENTER_FUNCTION (); |
| 428 | 3876 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3877 (nargs, args)); | |
| 1292 | 3878 PROFILE_EXIT_FUNCTION (); |
| 428 | 3879 |
| 3880 UNGCPRO; | |
| 3881 } | |
| 3882 else | |
| 3883 { | |
| 3884 wrong_number_of_arguments: | |
| 440 | 3885 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3886 } |
| 3887 } | |
| 3888 else if (COMPILED_FUNCTIONP (fun)) | |
| 3889 { | |
| 3890 struct gcpro gcpro1; | |
| 3891 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3892 REGISTER Lisp_Object *p = args; | |
| 3893 | |
| 3894 GCPRO1 (args[0]); | |
| 3895 gcpro1.nvars = 0; | |
| 3896 | |
| 3897 { | |
| 3898 LIST_LOOP_2 (arg, original_args) | |
| 3899 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3900 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3901 gcpro1.nvars++; |
| 3902 } | |
| 3903 } | |
| 3904 | |
| 3905 backtrace.args = args; | |
| 3906 backtrace.nargs = nargs; | |
| 3907 backtrace.evalargs = 0; | |
| 3908 | |
| 1292 | 3909 PROFILE_ENTER_FUNCTION (); |
| 428 | 3910 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3911 PROFILE_EXIT_FUNCTION (); |
| 428 | 3912 |
| 3913 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3914 if (backtrace.debug_on_exit) | |
| 3915 val = do_debug_on_exit (val); | |
| 3916 /* Don't do it again when we return to eval. */ | |
| 3917 backtrace.debug_on_exit = 0; | |
| 3918 | |
| 3919 UNGCPRO; | |
| 3920 } | |
| 3921 else if (CONSP (fun)) | |
| 3922 { | |
| 3923 Lisp_Object funcar = XCAR (fun); | |
| 3924 | |
| 3925 if (EQ (funcar, Qautoload)) | |
| 3926 { | |
| 970 | 3927 /* do_autoload GCPROs both arguments */ |
| 428 | 3928 do_autoload (fun, original_fun); |
| 3929 goto retry; | |
| 3930 } | |
| 3931 else if (EQ (funcar, Qmacro)) | |
| 3932 { | |
| 1292 | 3933 PROFILE_ENTER_FUNCTION (); |
| 428 | 3934 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3935 PROFILE_EXIT_FUNCTION (); |
| 428 | 3936 } |
| 3937 else if (EQ (funcar, Qlambda)) | |
| 3938 { | |
| 3939 struct gcpro gcpro1; | |
| 3940 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3941 REGISTER Lisp_Object *p = args; | |
| 3942 | |
| 3943 GCPRO1 (args[0]); | |
| 3944 gcpro1.nvars = 0; | |
| 3945 | |
| 3946 { | |
| 3947 LIST_LOOP_2 (arg, original_args) | |
| 3948 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3949 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3950 gcpro1.nvars++; |
| 3951 } | |
| 3952 } | |
| 3953 | |
| 3954 UNGCPRO; | |
| 3955 | |
| 3956 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3957 backtrace.nargs = nargs; | |
| 3958 backtrace.evalargs = 0; | |
| 3959 | |
| 1292 | 3960 PROFILE_ENTER_FUNCTION (); |
| 428 | 3961 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3962 PROFILE_EXIT_FUNCTION (); |
| 428 | 3963 |
| 3964 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3965 if (backtrace.debug_on_exit) | |
| 3966 val = do_debug_on_exit (val); | |
| 3967 /* Don't do it again when we return to eval. */ | |
| 3968 backtrace.debug_on_exit = 0; | |
| 3969 } | |
| 3970 else | |
| 3971 { | |
| 3972 goto invalid_function; | |
| 3973 } | |
| 3974 } | |
| 4104 | 3975 else if (UNBOUNDP (fun)) |
| 3976 { | |
| 3977 val = signal_void_function_error (original_fun); | |
| 3978 } | |
| 3979 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3980 UNBOUNDP (fun)) */ | |
| 428 | 3981 { |
| 3982 invalid_function: | |
| 436 | 3983 val = signal_invalid_function_error (fun); |
| 428 | 3984 } |
| 3985 | |
| 3986 lisp_eval_depth--; | |
| 3987 if (backtrace.debug_on_exit) | |
| 3988 val = do_debug_on_exit (val); | |
| 3989 POP_BACKTRACE (backtrace); | |
| 3990 return val; | |
| 3991 } | |
| 3992 | |
| 3993 | |
| 1111 | 3994 |
| 3995 static void | |
| 3996 run_post_gc_hook (void) | |
| 3997 { | |
| 3998 Lisp_Object args[2]; | |
| 3999 | |
| 4000 args[0] = Qpost_gc_hook; | |
| 4001 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 4002 | |
| 4003 run_hook_with_args_trapping_problems | |
| 1333 | 4004 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 4005 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 4006 } | |
| 4007 | |
| 428 | 4008 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
|
4009 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 4010 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
|
4011 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4012 arguments: (FUNCTION &rest ARGS) |
| 428 | 4013 */ |
| 4014 (int nargs, Lisp_Object *args)) | |
| 4015 { | |
| 4016 /* This function can GC */ | |
| 4017 Lisp_Object fun; | |
| 4018 Lisp_Object val; | |
| 4162 | 4019 PROFILE_DECLARE(); |
| 428 | 4020 int fun_nargs = nargs - 1; |
| 4021 Lisp_Object *fun_args = args + 1; | |
| 4022 | |
| 1318 | 4023 /* QUIT will check for proper redisplay wrapping */ |
| 4024 | |
| 428 | 4025 QUIT; |
| 851 | 4026 |
| 4027 if (funcall_allocation_flag) | |
| 4028 { | |
| 4029 if (need_to_garbage_collect) | |
| 4030 /* Callers should gcpro lexpr args */ | |
| 3092 | 4031 #ifdef NEW_GC |
| 4032 gc_incremental (); | |
| 4033 #else /* not NEW_GC */ | |
| 851 | 4034 garbage_collect_1 (); |
| 3092 | 4035 #endif /* not NEW_GC */ |
| 851 | 4036 if (need_to_check_c_alloca) |
| 4037 { | |
| 4038 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 4039 { | |
| 4040 xemacs_c_alloca (0); | |
| 4041 funcall_alloca_count = 0; | |
| 4042 } | |
| 4043 } | |
| 887 | 4044 if (need_to_signal_post_gc) |
| 4045 { | |
| 4046 need_to_signal_post_gc = 0; | |
| 1111 | 4047 recompute_funcall_allocation_flag (); |
| 3263 | 4048 #ifdef NEW_GC |
| 4049 run_finalizers (); | |
| 4050 #endif /* NEW_GC */ | |
| 1111 | 4051 run_post_gc_hook (); |
| 887 | 4052 } |
| 851 | 4053 } |
| 428 | 4054 |
| 4055 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 4056 { | |
| 4057 if (max_lisp_eval_depth < 100) | |
| 4058 max_lisp_eval_depth = 100; | |
| 4059 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 4060 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 4061 Qunbound); | |
| 428 | 4062 } |
| 4063 | |
| 1292 | 4064 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4065 backtrace.function = &args[0]; |
| 4066 backtrace.args = fun_args; | |
| 4067 backtrace.nargs = fun_nargs; | |
| 4068 backtrace.evalargs = 0; | |
| 4069 backtrace.debug_on_exit = 0; | |
| 1292 | 4070 backtrace.function_being_called = 0; |
| 428 | 4071 PUSH_BACKTRACE (backtrace); |
| 4072 | |
| 4073 if (debug_on_next_call) | |
| 4074 do_debug_on_call (Qlambda); | |
| 4075 | |
| 4076 retry: | |
| 4077 | |
| 4078 fun = args[0]; | |
| 4079 | |
| 4080 /* We could call indirect_function directly, but profiling shows | |
| 4081 this is worth optimizing by partially unrolling the loop. */ | |
| 4082 if (SYMBOLP (fun)) | |
| 4083 { | |
| 4084 fun = XSYMBOL (fun)->function; | |
| 4085 if (SYMBOLP (fun)) | |
| 4086 { | |
| 4087 fun = XSYMBOL (fun)->function; | |
| 4088 if (SYMBOLP (fun)) | |
| 4089 fun = indirect_function (fun, 1); | |
| 4090 } | |
| 4091 } | |
| 4092 | |
| 4093 if (SUBRP (fun)) | |
| 4094 { | |
| 4095 Lisp_Subr *subr = XSUBR (fun); | |
| 4096 int max_args = subr->max_args; | |
| 4097 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4098 | |
| 4099 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4100 { | |
| 4101 funcall_subr: | |
| 1292 | 4102 PROFILE_ENTER_FUNCTION (); |
| 428 | 4103 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4104 PROFILE_EXIT_FUNCTION (); |
| 428 | 4105 } |
| 436 | 4106 else if (fun_nargs < subr->min_args) |
| 4107 { | |
| 4108 goto wrong_number_of_arguments; | |
| 4109 } | |
| 428 | 4110 else if (fun_nargs < max_args) |
| 4111 { | |
| 4112 Lisp_Object *p = spacious_args; | |
| 4113 | |
| 4114 /* Default optionals to nil */ | |
| 4115 while (fun_nargs--) | |
| 4116 *p++ = *fun_args++; | |
| 4117 while (p - spacious_args < max_args) | |
| 4118 *p++ = Qnil; | |
| 4119 | |
| 4120 fun_args = spacious_args; | |
| 4121 goto funcall_subr; | |
| 4122 } | |
| 4123 else if (max_args == MANY) | |
| 4124 { | |
| 1292 | 4125 PROFILE_ENTER_FUNCTION (); |
| 436 | 4126 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4127 PROFILE_EXIT_FUNCTION (); |
| 428 | 4128 } |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4129 else if (max_args == UNEVALLED) /* Can't funcall a special operator */ |
| 428 | 4130 { |
|
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
|
4131 |
|
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4132 #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
|
4133 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4134 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4135 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4136 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4137 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4138 } |
|
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
|
4139 #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
|
4140 |
| 428 | 4141 goto invalid_function; |
| 4142 } | |
| 4143 else | |
| 4144 { | |
| 4145 wrong_number_of_arguments: | |
| 436 | 4146 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4147 } |
| 4148 } | |
| 4149 else if (COMPILED_FUNCTIONP (fun)) | |
| 4150 { | |
| 1292 | 4151 PROFILE_ENTER_FUNCTION (); |
| 428 | 4152 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4153 PROFILE_EXIT_FUNCTION (); |
| 428 | 4154 } |
| 4155 else if (CONSP (fun)) | |
| 4156 { | |
| 4157 Lisp_Object funcar = XCAR (fun); | |
| 4158 | |
| 4159 if (EQ (funcar, Qlambda)) | |
| 4160 { | |
| 1292 | 4161 PROFILE_ENTER_FUNCTION (); |
| 428 | 4162 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4163 PROFILE_EXIT_FUNCTION (); |
| 428 | 4164 } |
| 4165 else if (EQ (funcar, Qautoload)) | |
| 4166 { | |
| 970 | 4167 /* do_autoload GCPROs both arguments */ |
| 428 | 4168 do_autoload (fun, args[0]); |
| 4169 goto retry; | |
| 4170 } | |
| 4171 else /* Can't funcall a macro */ | |
| 4172 { | |
| 4173 goto invalid_function; | |
| 4174 } | |
| 4175 } | |
| 4176 else if (UNBOUNDP (fun)) | |
| 4177 { | |
| 436 | 4178 val = signal_void_function_error (args[0]); |
| 428 | 4179 } |
| 4180 else | |
| 4181 { | |
| 4182 invalid_function: | |
| 436 | 4183 val = signal_invalid_function_error (fun); |
| 428 | 4184 } |
| 4185 | |
| 4186 lisp_eval_depth--; | |
| 4187 if (backtrace.debug_on_exit) | |
| 4188 val = do_debug_on_exit (val); | |
| 4189 POP_BACKTRACE (backtrace); | |
| 4190 return val; | |
| 4191 } | |
| 4192 | |
| 4193 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4194 Return t if OBJECT can be called as a function, else nil. | |
| 4195 A function is an object that can be applied to arguments, | |
| 4196 using for example `funcall' or `apply'. | |
| 4197 */ | |
| 4198 (object)) | |
| 4199 { | |
| 4200 if (SYMBOLP (object)) | |
| 4201 object = indirect_function (object, 0); | |
| 4202 | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4203 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
|
4204 || (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
|
4205 && (XSUBR (object)->max_args != UNEVALLED))) |
| 919 | 4206 return Qt; |
| 4207 if (CONSP (object)) | |
| 4208 { | |
| 4209 Lisp_Object car = XCAR (object); | |
| 4210 if (EQ (car, Qlambda)) | |
| 4211 return Qt; | |
| 4212 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
|
4213 && 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
|
4214 (Fcdr_safe (XCDR (object))))))) |
| 919 | 4215 return Qt; |
| 4216 } | |
| 4217 return Qnil; | |
| 428 | 4218 } |
| 4219 | |
| 4220 static Lisp_Object | |
| 4221 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4222 { | |
| 4223 Lisp_Object orig_function = function; | |
| 4224 Lisp_Object arglist; | |
| 4225 | |
| 4226 retry: | |
| 4227 | |
| 4228 if (SYMBOLP (function)) | |
| 4229 function = indirect_function (function, 1); | |
| 4230 | |
| 4231 if (SUBRP (function)) | |
| 4232 { | |
| 442 | 4233 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4234 if (function_min_args_p) | |
| 4235 return Fsubr_min_args (function); | |
| 4236 else | |
| 4237 return Fsubr_max_args (function); | |
| 428 | 4238 } |
| 4239 else if (COMPILED_FUNCTIONP (function)) | |
| 4240 { | |
| 814 | 4241 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4242 | |
| 1737 | 4243 if (!OPAQUEP (f->instructions)) |
| 4244 /* Lazily munge the instructions into a more efficient form */ | |
| 4245 /* Needed to set max_args */ | |
| 4246 optimize_compiled_function (function); | |
| 4247 | |
| 814 | 4248 if (function_min_args_p) |
| 4249 return make_int (f->min_args); | |
| 4250 else if (f->max_args == MANY) | |
| 4251 return Qnil; | |
| 4252 else | |
| 4253 return make_int (f->max_args); | |
| 428 | 4254 } |
| 4255 else if (CONSP (function)) | |
| 4256 { | |
| 4257 Lisp_Object funcar = XCAR (function); | |
| 4258 | |
| 4259 if (EQ (funcar, Qmacro)) | |
| 4260 { | |
| 4261 function = XCDR (function); | |
| 4262 goto retry; | |
| 4263 } | |
| 4264 else if (EQ (funcar, Qautoload)) | |
| 4265 { | |
| 970 | 4266 /* do_autoload GCPROs both arguments */ |
| 428 | 4267 do_autoload (function, orig_function); |
| 442 | 4268 function = orig_function; |
| 428 | 4269 goto retry; |
| 4270 } | |
| 4271 else if (EQ (funcar, Qlambda)) | |
| 4272 { | |
| 4273 arglist = Fcar (XCDR (function)); | |
| 4274 } | |
| 4275 else | |
| 4276 { | |
| 4277 goto invalid_function; | |
| 4278 } | |
| 4279 } | |
| 4280 else | |
| 4281 { | |
| 4282 invalid_function: | |
| 442 | 4283 return signal_invalid_function_error (orig_function); |
| 428 | 4284 } |
| 4285 | |
| 4286 { | |
| 4287 int argcount = 0; | |
| 4288 | |
| 4289 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4290 { | |
| 4291 if (EQ (arg, Qand_optional)) | |
| 4292 { | |
| 4293 if (function_min_args_p) | |
| 4294 break; | |
| 4295 } | |
| 4296 else if (EQ (arg, Qand_rest)) | |
| 4297 { | |
| 4298 if (function_min_args_p) | |
| 4299 break; | |
| 4300 else | |
| 4301 return Qnil; | |
| 4302 } | |
| 4303 else | |
| 4304 { | |
| 4305 argcount++; | |
| 4306 } | |
| 4307 } | |
| 4308 | |
| 4309 return make_int (argcount); | |
| 4310 } | |
| 4311 } | |
| 4312 | |
| 4313 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4314 Return the minimum number of arguments a function may be called with. |
| 428 | 4315 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
|
4316 any special operator, or any macro. |
| 853 | 4317 |
| 4318 To check if a function can be called with a specified number of | |
| 4319 arguments, use `function-allows-args'. | |
| 428 | 4320 */ |
| 4321 (function)) | |
| 4322 { | |
| 4323 return function_argcount (function, 1); | |
| 4324 } | |
| 4325 | |
| 4326 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4327 Return the maximum number of arguments a function may be called with. |
| 428 | 4328 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
|
4329 any special operator, or any macro. |
| 428 | 4330 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
|
4331 a built-in special operator, nil is returned. |
| 853 | 4332 |
| 4333 To check if a function can be called with a specified number of | |
| 4334 arguments, use `function-allows-args'. | |
| 428 | 4335 */ |
| 4336 (function)) | |
| 4337 { | |
| 4338 return function_argcount (function, 0); | |
| 4339 } | |
| 4340 | |
| 4341 | |
| 4342 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4343 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4344 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
|
4345 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4346 arguments: (FUNCTION &rest ARGS) |
| 428 | 4347 */ |
| 4348 (int nargs, Lisp_Object *args)) | |
| 4349 { | |
| 4350 /* This function can GC */ | |
| 4351 Lisp_Object fun = args[0]; | |
| 4352 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4353 int numargs; | |
| 4354 int funcall_nargs; | |
| 4355 | |
| 4356 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4357 | |
| 4358 if (numargs == 0) | |
| 4359 /* (apply foo 0 1 '()) */ | |
| 4360 return Ffuncall (nargs - 1, args); | |
| 4361 else if (numargs == 1) | |
| 4362 { | |
| 4363 /* (apply foo 0 1 '(2)) */ | |
| 4364 args [nargs - 1] = XCAR (spread_arg); | |
| 4365 return Ffuncall (nargs, args); | |
| 4366 } | |
| 4367 | |
| 4368 /* -1 for function, -1 for spread arg */ | |
| 4369 numargs = nargs - 2 + numargs; | |
| 4370 /* +1 for function */ | |
| 4371 funcall_nargs = 1 + numargs; | |
| 4372 | |
| 4373 if (SYMBOLP (fun)) | |
| 4374 fun = indirect_function (fun, 0); | |
| 4375 | |
| 4376 if (SUBRP (fun)) | |
| 4377 { | |
| 4378 Lisp_Subr *subr = XSUBR (fun); | |
| 4379 int max_args = subr->max_args; | |
| 4380 | |
| 4381 if (numargs < subr->min_args | |
| 4382 || (max_args >= 0 && max_args < numargs)) | |
| 4383 { | |
| 4384 /* Let funcall get the error */ | |
| 4385 } | |
| 4386 else if (max_args > numargs) | |
| 4387 { | |
| 4388 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4389 by explicitly supplying nil's for optional values */ | |
| 4390 funcall_nargs += (max_args - numargs); | |
| 4391 } | |
| 4392 } | |
| 4393 else if (UNBOUNDP (fun)) | |
| 4394 { | |
| 4395 /* Let funcall get the error */ | |
| 4396 fun = args[0]; | |
| 4397 } | |
| 4398 | |
| 4399 { | |
| 4400 REGISTER int i; | |
| 4401 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4402 struct gcpro gcpro1; | |
| 4403 | |
| 4404 GCPRO1 (*funcall_args); | |
| 4405 gcpro1.nvars = funcall_nargs; | |
| 4406 | |
| 4407 /* Copy in the unspread args */ | |
| 4408 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4409 /* Spread the last arg we got. Its first element goes in | |
| 4410 the slot that it used to occupy, hence this value of I. */ | |
| 4411 for (i = nargs - 1; | |
| 4412 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4413 i++, spread_arg = XCDR (spread_arg)) | |
| 4414 { | |
| 4415 funcall_args [i] = XCAR (spread_arg); | |
| 4416 } | |
| 4417 /* Supply nil for optional args (to subrs) */ | |
| 4418 for (; i < funcall_nargs; i++) | |
| 4419 funcall_args[i] = Qnil; | |
| 4420 | |
| 4421 | |
| 4422 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4423 } | |
| 4424 } | |
| 4425 | |
| 4426 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4427 return the result of evaluation. */ | |
| 4428 | |
| 4429 static Lisp_Object | |
| 4430 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4431 { | |
| 4432 /* This function can GC */ | |
| 442 | 4433 Lisp_Object arglist, body, tail; |
| 428 | 4434 int speccount = specpdl_depth(); |
| 4435 REGISTER int i = 0; | |
| 4436 | |
| 4437 tail = XCDR (fun); | |
| 4438 | |
| 4439 if (!CONSP (tail)) | |
| 4440 goto invalid_function; | |
| 4441 | |
| 4442 arglist = XCAR (tail); | |
| 4443 body = XCDR (tail); | |
| 4444 | |
| 4445 { | |
| 4446 int optional = 0, rest = 0; | |
| 4447 | |
| 442 | 4448 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4449 { |
| 4450 if (!SYMBOLP (symbol)) | |
| 4451 goto invalid_function; | |
| 4452 if (EQ (symbol, Qand_rest)) | |
| 4453 rest = 1; | |
| 4454 else if (EQ (symbol, Qand_optional)) | |
| 4455 optional = 1; | |
| 4456 else if (rest) | |
| 4457 { | |
| 4458 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4459 i = nargs; | |
| 4460 } | |
| 4461 else if (i < nargs) | |
| 4462 specbind (symbol, args[i++]); | |
| 4463 else if (!optional) | |
| 4464 goto wrong_number_of_arguments; | |
| 4465 else | |
| 4466 specbind (symbol, Qnil); | |
| 4467 } | |
| 4468 } | |
| 4469 | |
| 4470 if (i < nargs) | |
| 4471 goto wrong_number_of_arguments; | |
| 4472 | |
| 771 | 4473 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4474 |
| 4475 wrong_number_of_arguments: | |
| 436 | 4476 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4477 |
| 4478 invalid_function: | |
| 436 | 4479 return signal_invalid_function_error (fun); |
| 428 | 4480 } |
| 4481 | |
| 4482 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4483 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4484 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4485 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
|
4486 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4487 -- 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
|
4488 -- 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
|
4489 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4490 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4491 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
|
4492 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4493 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
|
4494 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
|
4495 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
|
4496 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
|
4497 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
|
4498 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
|
4499 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
|
4500 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
|
4501 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4502 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
|
4503 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
|
4504 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
|
4505 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
|
4506 #'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
|
4507 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
|
4508 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4509 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4510 (#'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
|
4511 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
|
4512 #'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
|
4513 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
|
4514 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
|
4515 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4516 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
|
4517 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
|
4518 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
|
4519 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
|
4520 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4521 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
|
4522 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
|
4523 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
|
4524 on being printed from within GDB. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4525 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4526 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
|
4527 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
|
4528 #'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
|
4529 #'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
|
4530 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
|
4531 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
|
4532 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
|
4533 *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
|
4534 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4535 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4536 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
|
4537 admirable clarity by CLTL2: |
|
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 "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
|
4540 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
|
4541 used." |
|
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 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
|
4544 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
|
4545 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
|
4546 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
|
4547 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4548 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4549 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
|
4550 Elemcount first_desired, Elemcount upper_limit) |
|
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 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4553 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4554 Elemcount i, allocated_count; |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4555 Lisp_Object mvobj; |
|
4677
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 assert (count != 1); |
|
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 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
|
4560 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4561 /* 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
|
4562 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4563 first_desired = 1; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4566 if (first_desired >= count) |
|
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 /* 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
|
4569 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4570 allocated_count = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4571 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4573 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4574 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
|
4575 - first_desired); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4576 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4577 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4578 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
|
4579 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 contents, allocated_count); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4581 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
|
4582 mv = XMULTIPLE_VALUE (mvobj); |
|
4677
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 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4585 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4586 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 mv->contents[0] = first_value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 for (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
|
4590 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4591 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
|
4592 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4593 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4594 return mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4595 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4596 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4597 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4598 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
|
4599 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 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
|
4601 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4602 Elemcount allocated_count = mv->allocated_count; |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4605 (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
|
4606 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4607 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
|
4608 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4609 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4610 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4611 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
|
4612 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4613 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4614 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4615 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
|
4616 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4617 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
|
4618 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4619 Elemcount allocated_count = mv->allocated_count; |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4622 (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
|
4623 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4624 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
|
4625 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4626 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4628 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
|
4629 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4630 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4631 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4632 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
|
4633 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4634 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
|
4635 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4636 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4637 Elemcount count = mv->count, index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4638 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 { |
|
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
|
4641 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
|
4642 LISP_OBJECT_UID (obj)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4643 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4644 |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4645 write_fmt_string (printcharfun, |
|
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4646 "#<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
|
4647 " data (", count); |
|
4677
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 for (index = 0; index < count;) |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4652 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4653 index >= (first_desired + (allocated_count - 1)))) |
|
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 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
|
4656 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4657 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4658 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4660 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
|
4661 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4662 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4663 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4664 ++index; |
|
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 if (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 { |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4668 write_ascstring (printcharfun, " "); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4670 } |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4671 |
|
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
|
4672 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
|
4673 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4674 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4675 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4676 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4677 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4678 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
|
4679 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
|
4680 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4681 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
|
4682 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4683 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4684 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4685 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4686 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4687 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4688 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4689 static Bytecount |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4690 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
|
4691 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4692 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
|
4693 Lisp_Object, contents, |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4694 XMULTIPLE_VALUE (obj)->allocated_count); |
|
4677
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4697 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
|
4698 { 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
|
4699 { 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
|
4700 { 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
|
4701 { 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
|
4702 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4703 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4704 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4705 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4706 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
|
4707 mark_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4708 print_multiple_value, 0, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4709 0, /* No equal method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4710 0, /* No hash method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4711 multiple_value_description, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4712 size_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4713 struct multiple_value); |
|
4677
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 /* 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
|
4716 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
|
4717 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
|
4718 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
|
4719 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4720 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
|
4721 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4722 int result = specpdl_depth(); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4723 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4724 if (!(upper > first)) |
|
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 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
|
4727 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4728 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4729 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4730 if (upper > Vmultiple_values_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4731 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 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
|
4733 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4734 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4735 /* 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
|
4736 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
|
4737 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
|
4738 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
|
4739 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4740 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
|
4741 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
|
4742 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4743 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
|
4744 if (0 == first) |
|
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 first = 1; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4749 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4750 || first < first_desired_multiple_value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 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
|
4753 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4754 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4755 if (upper > multiple_value_current_limit) |
|
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 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
|
4758 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4759 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4760 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4761 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4762 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4763 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4764 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
|
4765 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4766 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4767 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4768 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
|
4769 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4770 Lisp_Object apply_args[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4771 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4772 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4773 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4774 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4775 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4776 CHECK_FUNCTION (args[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4777 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4778 /* 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
|
4779 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
|
4780 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 for (i = 4; i < nargs; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4782 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4785 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4786 Lisp_Object val; |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4787 Elemcount j, count = XMULTIPLE_VALUE_COUNT (result); |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4788 |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4789 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
|
4790 { |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4791 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
|
4792 assert (!UNBOUNDP (val)); |
|
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 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4796 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4797 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4798 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4800 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4801 list_offset = XCDR (list_offset); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4805 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4806 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4807 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4808 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4809 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4810 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
|
4811 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4812 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 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
|
4814 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
|
4815 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4816 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
|
4817 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
|
4818 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
|
4819 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
|
4820 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4821 arguments: (FUNCTION &rest FORMS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4822 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4823 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4824 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4825 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4826 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4827 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 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
|
4832 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4833 /* 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
|
4834 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
|
4835 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4837 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4838 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4840 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4841 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 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
|
4843 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4844 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4845 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
|
4846 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4847 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4848 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4849 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4850 LIST_LOOP_2 (elt, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4851 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4852 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4853 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4855 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4856 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4857 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
|
4858 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4859 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4860 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4861 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
|
4862 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4863 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
|
4864 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4865 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4866 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4867 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4868 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4869 result = args[3]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4870 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4871 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4872 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 if (MULTIPLE_VALUEP (result)) |
|
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 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
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 for (; first < upper && first < count; ++first) |
|
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 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4884 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4885 list_offset = XCDR (list_offset); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4888 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4889 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4890 else |
|
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 if (first == 0) |
|
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 return Fcons (result, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4895 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4896 else |
|
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 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4901 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4902 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4903 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
|
4904 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4905 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
|
4906 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4907 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
|
4908 Lisp, instead. |
|
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 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
|
4911 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
|
4912 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
|
4913 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
|
4914 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
|
4915 `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
|
4916 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4917 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
|
4918 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4919 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4920 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4921 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4922 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4924 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4925 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4926 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4927 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4928 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4929 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
|
4930 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4931 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4932 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
|
4933 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4935 gcpro1.nvars = 1; |
|
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 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4938 argv[1] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4939 |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4940 check_integer_range (argv[1], Qzero, make_int (EMACS_INT_MAX)); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4941 check_integer_range (argv[0], Qzero, argv[1]); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4942 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4943 upper = XINT (argv[1]); |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4944 first = XINT (argv[0]); |
|
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
4945 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4946 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4947 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4948 /* 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
|
4949 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
|
4950 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
|
4951 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 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
|
4953 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4954 args = XCDR (args); |
|
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 /* 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
|
4957 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
|
4958 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
|
4959 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
|
4960 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
|
4961 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4962 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 gcpro1.nvars = 4; |
|
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 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
|
4966 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4967 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4968 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
|
4969 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
|
4970 `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
|
4971 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 arguments: (FIRST &rest BODY) |
|
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 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4976 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4977 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4978 struct gcpro gcpro1; |
|
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 val = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4981 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4982 GCPRO1 (val); |
|
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 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4986 Feval (form); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4989 RETURN_UNGCPRO (val); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4992 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4993 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4995 arguments: (&rest ARGS) |
|
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 (int nargs, Lisp_Object *args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4998 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4999 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5000 int counting = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5001 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5002 /* 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
|
5003 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
|
5004 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5005 return nargs ? args[0] : Qnil; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5008 /* 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
|
5009 #'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
|
5010 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
|
5011 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5012 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
|
5013 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5014 multiple_value_current_limit); |
|
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 for (; counting < nargs; ++counting) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5017 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5018 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5019 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5020 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5021 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
|
5022 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5023 } |
|
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 return result; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5028 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
|
5029 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
|
5030 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5031 (list)) |
|
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 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5034 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5035 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5036 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5037 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5038 /* 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
|
5039 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
|
5040 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5041 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5042 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5043 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5044 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
|
5045 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5046 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5047 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5048 list = Fcdr_safe (list); |
|
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 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
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 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5054 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5055 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5056 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5057 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5058 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5059 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5060 } |
|
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 result; |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5066 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
|
5067 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5068 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5069 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5070 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5071 argv[1] = second; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5072 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5073 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5074 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5075 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5076 |
| 428 | 5077 /************************************************************************/ |
| 5078 /* Run hook variables in various ways. */ | |
| 5079 /************************************************************************/ | |
| 5080 | |
| 5081 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5082 Run each hook in HOOKS. Major mode functions use this. | |
| 5083 Each argument should be a symbol, a hook variable. | |
| 5084 These symbols are processed in the order specified. | |
| 5085 If a hook symbol has a non-nil value, that value may be a function | |
| 5086 or a list of functions to be called to run the hook. | |
| 5087 If the value is a function, it is called with no arguments. | |
| 5088 If it is a list, the elements are called, in order, with no arguments. | |
| 5089 | |
| 5090 To make a hook variable buffer-local, use `make-local-hook', | |
| 5091 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5092 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5093 arguments: (FIRST &rest REST) |
| 428 | 5094 */ |
| 5095 (int nargs, Lisp_Object *args)) | |
| 5096 { | |
| 5097 REGISTER int i; | |
| 5098 | |
| 5099 for (i = 0; i < nargs; i++) | |
| 5100 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5101 | |
| 5102 return Qnil; | |
| 5103 } | |
| 5104 | |
| 5105 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5106 Run HOOK with the specified arguments ARGS. | |
| 5107 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5108 value, that value may be a function or a list of functions to be | |
| 5109 called to run the hook. If the value is a function, it is called with | |
| 5110 the given arguments and its return value is returned. If it is a list | |
| 5111 of functions, those functions are called, in order, | |
| 5112 with the given arguments ARGS. | |
| 444 | 5113 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5114 as that may change. |
| 5115 | |
| 5116 To make a hook variable buffer-local, use `make-local-hook', | |
| 5117 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5118 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5119 arguments: (HOOK &rest ARGS) |
| 428 | 5120 */ |
| 5121 (int nargs, Lisp_Object *args)) | |
| 5122 { | |
| 5123 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5124 } | |
| 5125 | |
| 5126 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5127 Run HOOK with the specified arguments ARGS. | |
| 5128 HOOK should be a symbol, a hook variable. Its value should | |
| 5129 be a list of functions. We call those functions, one by one, | |
| 5130 passing arguments ARGS to each of them, until one of them | |
| 5131 returns a non-nil value. Then we return that value. | |
| 5132 If all the functions return nil, we return nil. | |
| 5133 | |
| 5134 To make a hook variable buffer-local, use `make-local-hook', | |
| 5135 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5136 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5137 arguments: (HOOK &rest ARGS) |
| 428 | 5138 */ |
| 5139 (int nargs, Lisp_Object *args)) | |
| 5140 { | |
| 5141 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5142 } | |
| 5143 | |
| 5144 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5145 Run HOOK with the specified arguments ARGS. | |
| 5146 HOOK should be a symbol, a hook variable. Its value should | |
| 5147 be a list of functions. We call those functions, one by one, | |
| 5148 passing arguments ARGS to each of them, until one of them | |
| 5149 returns nil. Then we return nil. | |
| 5150 If all the functions return non-nil, we return non-nil. | |
| 5151 | |
| 5152 To make a hook variable buffer-local, use `make-local-hook', | |
| 5153 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5154 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5155 arguments: (HOOK &rest ARGS) |
| 428 | 5156 */ |
| 5157 (int nargs, Lisp_Object *args)) | |
| 5158 { | |
| 5159 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5160 } | |
| 5161 | |
| 5162 /* ARGS[0] should be a hook symbol. | |
| 5163 Call each of the functions in the hook value, passing each of them | |
| 5164 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5165 COND specifies a condition to test after each call | |
| 5166 to decide whether to stop. | |
| 5167 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5168 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5169 | |
| 5170 Lisp_Object | |
| 5171 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5172 enum run_hooks_condition cond) | |
| 5173 { | |
| 5174 Lisp_Object sym, val, ret; | |
| 5175 | |
| 5176 if (!initialized || preparing_for_armageddon) | |
| 5177 /* We need to bail out of here pronto. */ | |
| 5178 return Qnil; | |
| 5179 | |
| 3092 | 5180 #ifndef NEW_GC |
| 428 | 5181 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5182 will also be true unless something is really hosed. */ | |
| 5183 assert (!gc_in_progress); | |
| 3092 | 5184 #endif /* not NEW_GC */ |
| 428 | 5185 |
| 5186 sym = args[0]; | |
| 771 | 5187 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5188 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5189 | |
| 5190 if (UNBOUNDP (val) || NILP (val)) | |
| 5191 return ret; | |
| 5192 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5193 { | |
| 5194 args[0] = val; | |
| 5195 return Ffuncall (nargs, args); | |
| 5196 } | |
| 5197 else | |
| 5198 { | |
| 5199 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5200 Lisp_Object globals = Qnil; | |
| 5201 GCPRO3 (sym, val, globals); | |
| 5202 | |
| 5203 for (; | |
| 5204 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5205 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5206 : !NILP (ret))); | |
| 5207 val = XCDR (val)) | |
| 5208 { | |
| 5209 if (EQ (XCAR (val), Qt)) | |
| 5210 { | |
| 5211 /* t indicates this hook has a local binding; | |
| 5212 it means to run the global binding too. */ | |
| 5213 globals = Fdefault_value (sym); | |
| 5214 | |
| 5215 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5216 ! NILP (globals)) | |
| 5217 { | |
| 5218 args[0] = globals; | |
| 5219 ret = Ffuncall (nargs, args); | |
| 5220 } | |
| 5221 else | |
| 5222 { | |
| 5223 for (; | |
| 5224 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5225 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5226 ? NILP (ret) | |
| 5227 : !NILP (ret))); | |
| 5228 globals = XCDR (globals)) | |
| 5229 { | |
| 5230 args[0] = XCAR (globals); | |
| 5231 /* In a global value, t should not occur. If it does, we | |
| 5232 must ignore it to avoid an endless loop. */ | |
| 5233 if (!EQ (args[0], Qt)) | |
| 5234 ret = Ffuncall (nargs, args); | |
| 5235 } | |
| 5236 } | |
| 5237 } | |
| 5238 else | |
| 5239 { | |
| 5240 args[0] = XCAR (val); | |
| 5241 ret = Ffuncall (nargs, args); | |
| 5242 } | |
| 5243 } | |
| 5244 | |
| 5245 UNGCPRO; | |
| 5246 return ret; | |
| 5247 } | |
| 5248 } | |
| 5249 | |
| 5250 Lisp_Object | |
| 5251 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5252 enum run_hooks_condition cond) | |
| 5253 { | |
| 5254 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5255 } | |
| 5256 | |
| 5257 #if 0 | |
| 5258 | |
| 853 | 5259 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5260 |
| 5261 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5262 present value of that symbol. | |
| 5263 Call each element of FUNLIST, | |
| 5264 passing each of them the rest of ARGS. | |
| 5265 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5266 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5267 | |
| 5268 Lisp_Object | |
| 5269 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5270 { | |
| 853 | 5271 omitted; |
| 428 | 5272 } |
| 5273 | |
| 5274 #endif /* 0 */ | |
| 5275 | |
| 5276 void | |
| 5277 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5278 { | |
| 5279 /* This function can GC */ | |
| 5280 struct gcpro gcpro1; | |
| 5281 int i; | |
| 5282 va_list vargs; | |
| 5283 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5284 | |
| 5285 va_start (vargs, nargs); | |
| 5286 funcall_args[0] = hook_var; | |
| 5287 for (i = 0; i < nargs; i++) | |
| 5288 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5289 va_end (vargs); | |
| 5290 | |
| 5291 GCPRO1 (*funcall_args); | |
| 5292 gcpro1.nvars = nargs + 1; | |
| 5293 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5294 UNGCPRO; | |
| 5295 } | |
| 5296 | |
| 5297 void | |
| 5298 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5299 int nargs, ...) | |
| 5300 { | |
| 5301 /* This function can GC */ | |
| 5302 struct gcpro gcpro1; | |
| 5303 int i; | |
| 5304 va_list vargs; | |
| 5305 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5306 | |
| 5307 va_start (vargs, nargs); | |
| 5308 funcall_args[0] = hook_var; | |
| 5309 for (i = 0; i < nargs; i++) | |
| 5310 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5311 va_end (vargs); | |
| 5312 | |
| 5313 GCPRO1 (*funcall_args); | |
| 5314 gcpro1.nvars = nargs + 1; | |
| 5315 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5316 RUN_HOOKS_TO_COMPLETION); | |
| 5317 UNGCPRO; | |
| 5318 } | |
| 5319 | |
| 5320 Lisp_Object | |
| 5321 run_hook (Lisp_Object hook) | |
| 5322 { | |
| 853 | 5323 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5324 } |
| 5325 | |
| 5326 | |
| 5327 /************************************************************************/ | |
| 5328 /* Front-ends to eval, funcall, apply */ | |
| 5329 /************************************************************************/ | |
| 5330 | |
| 5331 /* Apply fn to arg */ | |
| 5332 Lisp_Object | |
| 5333 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5334 { | |
| 5335 /* This function can GC */ | |
| 5336 struct gcpro gcpro1; | |
| 5337 Lisp_Object args[2]; | |
| 5338 | |
| 5339 if (NILP (arg)) | |
| 5340 return Ffuncall (1, &fn); | |
| 5341 GCPRO1 (args[0]); | |
| 5342 gcpro1.nvars = 2; | |
| 5343 args[0] = fn; | |
| 5344 args[1] = arg; | |
| 5345 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5346 } | |
| 5347 | |
| 5348 /* Call function fn on no arguments */ | |
| 5349 Lisp_Object | |
| 5350 call0 (Lisp_Object fn) | |
| 5351 { | |
| 5352 /* This function can GC */ | |
| 5353 struct gcpro gcpro1; | |
| 5354 | |
| 5355 GCPRO1 (fn); | |
| 5356 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5357 } | |
| 5358 | |
| 5359 /* Call function fn with argument arg0 */ | |
| 5360 Lisp_Object | |
| 5361 call1 (Lisp_Object fn, | |
| 5362 Lisp_Object arg0) | |
| 5363 { | |
| 5364 /* This function can GC */ | |
| 5365 struct gcpro gcpro1; | |
| 5366 Lisp_Object args[2]; | |
| 5367 args[0] = fn; | |
| 5368 args[1] = arg0; | |
| 5369 GCPRO1 (args[0]); | |
| 5370 gcpro1.nvars = 2; | |
| 5371 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5372 } | |
| 5373 | |
| 5374 /* Call function fn with arguments arg0, arg1 */ | |
| 5375 Lisp_Object | |
| 5376 call2 (Lisp_Object fn, | |
| 5377 Lisp_Object arg0, Lisp_Object arg1) | |
| 5378 { | |
| 5379 /* This function can GC */ | |
| 5380 struct gcpro gcpro1; | |
| 5381 Lisp_Object args[3]; | |
| 5382 args[0] = fn; | |
| 5383 args[1] = arg0; | |
| 5384 args[2] = arg1; | |
| 5385 GCPRO1 (args[0]); | |
| 5386 gcpro1.nvars = 3; | |
| 5387 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5388 } | |
| 5389 | |
| 5390 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5391 Lisp_Object | |
| 5392 call3 (Lisp_Object fn, | |
| 5393 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5394 { | |
| 5395 /* This function can GC */ | |
| 5396 struct gcpro gcpro1; | |
| 5397 Lisp_Object args[4]; | |
| 5398 args[0] = fn; | |
| 5399 args[1] = arg0; | |
| 5400 args[2] = arg1; | |
| 5401 args[3] = arg2; | |
| 5402 GCPRO1 (args[0]); | |
| 5403 gcpro1.nvars = 4; | |
| 5404 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5405 } | |
| 5406 | |
| 5407 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5408 Lisp_Object | |
| 5409 call4 (Lisp_Object fn, | |
| 5410 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5411 Lisp_Object arg3) | |
| 5412 { | |
| 5413 /* This function can GC */ | |
| 5414 struct gcpro gcpro1; | |
| 5415 Lisp_Object args[5]; | |
| 5416 args[0] = fn; | |
| 5417 args[1] = arg0; | |
| 5418 args[2] = arg1; | |
| 5419 args[3] = arg2; | |
| 5420 args[4] = arg3; | |
| 5421 GCPRO1 (args[0]); | |
| 5422 gcpro1.nvars = 5; | |
| 5423 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5424 } | |
| 5425 | |
| 5426 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5427 Lisp_Object | |
| 5428 call5 (Lisp_Object fn, | |
| 5429 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5430 Lisp_Object arg3, Lisp_Object arg4) | |
| 5431 { | |
| 5432 /* This function can GC */ | |
| 5433 struct gcpro gcpro1; | |
| 5434 Lisp_Object args[6]; | |
| 5435 args[0] = fn; | |
| 5436 args[1] = arg0; | |
| 5437 args[2] = arg1; | |
| 5438 args[3] = arg2; | |
| 5439 args[4] = arg3; | |
| 5440 args[5] = arg4; | |
| 5441 GCPRO1 (args[0]); | |
| 5442 gcpro1.nvars = 6; | |
| 5443 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5444 } | |
| 5445 | |
| 5446 Lisp_Object | |
| 5447 call6 (Lisp_Object fn, | |
| 5448 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5449 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5450 { | |
| 5451 /* This function can GC */ | |
| 5452 struct gcpro gcpro1; | |
| 5453 Lisp_Object args[7]; | |
| 5454 args[0] = fn; | |
| 5455 args[1] = arg0; | |
| 5456 args[2] = arg1; | |
| 5457 args[3] = arg2; | |
| 5458 args[4] = arg3; | |
| 5459 args[5] = arg4; | |
| 5460 args[6] = arg5; | |
| 5461 GCPRO1 (args[0]); | |
| 5462 gcpro1.nvars = 7; | |
| 5463 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5464 } | |
| 5465 | |
| 5466 Lisp_Object | |
| 5467 call7 (Lisp_Object fn, | |
| 5468 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5469 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5470 Lisp_Object arg6) | |
| 5471 { | |
| 5472 /* This function can GC */ | |
| 5473 struct gcpro gcpro1; | |
| 5474 Lisp_Object args[8]; | |
| 5475 args[0] = fn; | |
| 5476 args[1] = arg0; | |
| 5477 args[2] = arg1; | |
| 5478 args[3] = arg2; | |
| 5479 args[4] = arg3; | |
| 5480 args[5] = arg4; | |
| 5481 args[6] = arg5; | |
| 5482 args[7] = arg6; | |
| 5483 GCPRO1 (args[0]); | |
| 5484 gcpro1.nvars = 8; | |
| 5485 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5486 } | |
| 5487 | |
| 5488 Lisp_Object | |
| 5489 call8 (Lisp_Object fn, | |
| 5490 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5491 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5492 Lisp_Object arg6, Lisp_Object arg7) | |
| 5493 { | |
| 5494 /* This function can GC */ | |
| 5495 struct gcpro gcpro1; | |
| 5496 Lisp_Object args[9]; | |
| 5497 args[0] = fn; | |
| 5498 args[1] = arg0; | |
| 5499 args[2] = arg1; | |
| 5500 args[3] = arg2; | |
| 5501 args[4] = arg3; | |
| 5502 args[5] = arg4; | |
| 5503 args[6] = arg5; | |
| 5504 args[7] = arg6; | |
| 5505 args[8] = arg7; | |
| 5506 GCPRO1 (args[0]); | |
| 5507 gcpro1.nvars = 9; | |
| 5508 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5509 } | |
| 5510 | |
| 5511 Lisp_Object | |
| 5512 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5513 { | |
| 5514 if (current_buffer == buf) | |
| 5515 return call0 (fn); | |
| 5516 else | |
| 5517 { | |
| 5518 Lisp_Object val; | |
| 5519 int speccount = specpdl_depth(); | |
| 5520 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5521 set_buffer_internal (buf); | |
| 5522 val = call0 (fn); | |
| 771 | 5523 unbind_to (speccount); |
| 428 | 5524 return val; |
| 5525 } | |
| 5526 } | |
| 5527 | |
| 5528 Lisp_Object | |
| 5529 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5530 Lisp_Object arg0) | |
| 5531 { | |
| 5532 if (current_buffer == buf) | |
| 5533 return call1 (fn, arg0); | |
| 5534 else | |
| 5535 { | |
| 5536 Lisp_Object val; | |
| 5537 int speccount = specpdl_depth(); | |
| 5538 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5539 set_buffer_internal (buf); | |
| 5540 val = call1 (fn, arg0); | |
| 771 | 5541 unbind_to (speccount); |
| 428 | 5542 return val; |
| 5543 } | |
| 5544 } | |
| 5545 | |
| 5546 Lisp_Object | |
| 5547 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5548 Lisp_Object arg0, Lisp_Object arg1) | |
| 5549 { | |
| 5550 if (current_buffer == buf) | |
| 5551 return call2 (fn, arg0, arg1); | |
| 5552 else | |
| 5553 { | |
| 5554 Lisp_Object val; | |
| 5555 int speccount = specpdl_depth(); | |
| 5556 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5557 set_buffer_internal (buf); | |
| 5558 val = call2 (fn, arg0, arg1); | |
| 771 | 5559 unbind_to (speccount); |
| 428 | 5560 return val; |
| 5561 } | |
| 5562 } | |
| 5563 | |
| 5564 Lisp_Object | |
| 5565 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5566 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5567 { | |
| 5568 if (current_buffer == buf) | |
| 5569 return call3 (fn, arg0, arg1, arg2); | |
| 5570 else | |
| 5571 { | |
| 5572 Lisp_Object val; | |
| 5573 int speccount = specpdl_depth(); | |
| 5574 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5575 set_buffer_internal (buf); | |
| 5576 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5577 unbind_to (speccount); |
| 428 | 5578 return val; |
| 5579 } | |
| 5580 } | |
| 5581 | |
| 5582 Lisp_Object | |
| 5583 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5584 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5585 Lisp_Object arg3) | |
| 5586 { | |
| 5587 if (current_buffer == buf) | |
| 5588 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5589 else | |
| 5590 { | |
| 5591 Lisp_Object val; | |
| 5592 int speccount = specpdl_depth(); | |
| 5593 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5594 set_buffer_internal (buf); | |
| 5595 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5596 unbind_to (speccount); |
| 428 | 5597 return val; |
| 5598 } | |
| 5599 } | |
| 5600 | |
| 5601 Lisp_Object | |
| 5602 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5603 { | |
| 5604 if (current_buffer == buf) | |
| 5605 return Feval (form); | |
| 5606 else | |
| 5607 { | |
| 5608 Lisp_Object val; | |
| 5609 int speccount = specpdl_depth(); | |
| 5610 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5611 set_buffer_internal (buf); | |
| 5612 val = Feval (form); | |
| 771 | 5613 unbind_to (speccount); |
| 428 | 5614 return val; |
| 5615 } | |
| 5616 } | |
| 5617 | |
| 5618 | |
| 5619 /************************************************************************/ | |
| 5620 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5621 /************************************************************************/ | |
| 5622 | |
| 853 | 5623 int |
| 5624 get_inhibit_flags (void) | |
| 5625 { | |
| 5626 return inhibit_flags; | |
| 5627 } | |
| 5628 | |
| 5629 void | |
| 2286 | 5630 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5631 { |
| 5632 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5633 { | |
| 5634 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5635 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5636 invalid_change | |
| 5637 ("Modification of this buffer not currently permitted", obj); | |
| 5638 } | |
| 5639 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5640 { | |
| 5641 if (what == OPERATION_DELETE_OBJECT | |
| 5642 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5643 || CONSOLEP (obj)) | |
| 5644 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5645 invalid_change | |
| 5646 ("Deletion of this object not currently permitted", obj); | |
| 5647 } | |
| 5648 } | |
| 5649 | |
| 5650 void | |
| 5651 note_object_created (Lisp_Object obj) | |
| 5652 { | |
| 5653 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5654 { | |
| 5655 if (BUFFERP (obj)) | |
| 5656 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5657 } | |
| 5658 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5659 { | |
| 5660 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5661 || CONSOLEP (obj)) | |
| 5662 Vdeletable_permanent_display_objects = | |
| 5663 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5664 } | |
| 5665 } | |
| 5666 | |
| 5667 void | |
| 5668 note_object_deleted (Lisp_Object obj) | |
| 5669 { | |
| 5670 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5671 { | |
| 5672 if (BUFFERP (obj)) | |
| 5673 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5674 } | |
| 5675 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5676 { | |
| 5677 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5678 || CONSOLEP (obj)) | |
| 5679 Vdeletable_permanent_display_objects = | |
| 5680 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5681 } | |
| 5682 } | |
| 5683 | |
| 5684 struct call_trapping_problems | |
| 5685 { | |
| 5686 Lisp_Object catchtag; | |
| 5687 Lisp_Object error_conditions; | |
| 5688 Lisp_Object data; | |
| 5689 Lisp_Object backtrace; | |
| 5690 Lisp_Object warning_class; | |
| 5691 | |
| 867 | 5692 const CIbyte *warning_string; |
| 853 | 5693 Lisp_Object (*fun) (void *); |
| 5694 void *arg; | |
| 5695 }; | |
| 428 | 5696 |
| 2532 | 5697 static Lisp_Object |
| 5698 maybe_get_trapping_problems_backtrace (void) | |
| 5699 { | |
| 5700 Lisp_Object backtrace; | |
| 853 | 5701 |
| 1123 | 5702 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5703 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5704 { |
| 1333 | 5705 struct gcpro gcpro1; |
| 5706 Lisp_Object lstream = Qnil; | |
| 5707 int speccount = specpdl_depth (); | |
| 5708 | |
| 853 | 5709 /* We're no longer protected against errors or quit here, so at |
| 5710 least let's temporarily inhibit quit. We definitely do not | |
| 5711 want to inhibit quit during the calling of the function | |
| 5712 itself!!!!!!!!!!! */ | |
| 5713 | |
| 5714 specbind (Qinhibit_quit, Qt); | |
| 5715 | |
| 5716 GCPRO1 (lstream); | |
| 5717 lstream = make_resizing_buffer_output_stream (); | |
| 5718 Fbacktrace (lstream, Qt); | |
| 5719 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5720 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5721 Lstream_delete (XLSTREAM (lstream)); |
| 5722 UNGCPRO; | |
| 5723 | |
| 5724 unbind_to (speccount); | |
| 428 | 5725 } |
| 853 | 5726 else |
| 2532 | 5727 backtrace = Qnil; |
| 5728 | |
| 5729 return backtrace; | |
| 5730 } | |
| 5731 | |
| 5732 static DECLARE_DOESNT_RETURN_TYPE | |
| 5733 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5734 | |
| 5735 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5736 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5737 Lisp_Object opaque) | |
| 5738 { | |
| 5739 struct call_trapping_problems *p = | |
| 5740 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5741 | |
| 5742 if (!EQ (error_conditions, Qquit)) | |
| 5743 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5744 else | |
| 853 | 5745 p->backtrace = Qnil; |
| 5746 p->error_conditions = error_conditions; | |
| 5747 p->data = data; | |
| 5748 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5749 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5750 RETURN_NOT_REACHED (Qnil); |
| 853 | 5751 } |
| 5752 | |
| 5753 static Lisp_Object | |
| 5754 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5755 { | |
| 5756 struct call_trapping_problems *p = | |
| 5757 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5758 | |
| 5759 return (p->fun) (p->arg); | |
| 428 | 5760 } |
| 5761 | |
| 5762 static Lisp_Object | |
| 853 | 5763 call_trapping_problems_1 (Lisp_Object opaque) |
| 5764 { | |
| 5765 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5766 call_trapping_problems_2, opaque); | |
| 5767 } | |
| 5768 | |
| 1333 | 5769 static void |
| 5770 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5771 const CIbyte *warning_string, | |
| 5772 struct call_trapping_problems_result *p) | |
| 5773 { | |
| 5774 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5775 { | |
| 5776 int depth = specpdl_depth (); | |
| 5777 | |
| 5778 /* We're no longer protected against errors or quit here, so at | |
| 5779 least let's temporarily inhibit quit. */ | |
| 5780 specbind (Qinhibit_quit, Qt); | |
| 5781 | |
| 5782 if (p->caught_throw) | |
| 5783 { | |
| 5784 Lisp_Object errstr = | |
| 5785 emacs_sprintf_string_lisp | |
| 2532 | 5786 ("%s: Attempt to throw outside of function:" |
| 5787 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5788 Qnil, 4, |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5789 build_msg_cistring (warning_string ? warning_string : "error"), |
| 2532 | 5790 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5791 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5792 } | |
| 2421 | 5793 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5794 { |
| 5795 Lisp_Object errstr; | |
| 5796 /* #### This should call | |
| 5797 (with-output-to-string (display-error (cons error_conditions | |
| 5798 data)) | |
| 5799 but that stuff is all in Lisp currently. */ | |
| 5800 errstr = | |
| 5801 emacs_sprintf_string_lisp | |
| 5802 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5803 Qnil, 4, | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5804 build_msg_cistring (warning_string ? warning_string : "error"), |
| 1333 | 5805 p->error_conditions, p->data, p->backtrace); |
| 5806 | |
| 5807 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5808 errstr); | |
| 5809 } | |
| 5810 | |
| 5811 unbind_to (depth); | |
| 5812 } | |
| 5813 } | |
| 5814 | |
| 1318 | 5815 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5816 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5817 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5818 use call_trapping_problems() for that. Turn the flags off with | |
| 5819 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5820 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5821 various other flags). */ | |
| 5822 | |
| 5823 int | |
| 5824 set_trapping_problems_flags (int flags) | |
| 5825 { | |
| 5826 int new_inhibit_flags; | |
| 5827 | |
| 5828 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5829 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5830 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5831 | INHIBIT_ENTERING_DEBUGGER | |
| 5832 | INHIBIT_WARNING_ISSUE | |
| 5833 | INHIBIT_GC; | |
| 5834 | |
| 5835 new_inhibit_flags = inhibit_flags | flags; | |
| 5836 if (new_inhibit_flags != inhibit_flags) | |
| 5837 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5838 | |
| 5839 if (flags & INHIBIT_QUIT) | |
| 5840 specbind (Qinhibit_quit, Qt); | |
| 5841 | |
| 5842 if (flags & UNINHIBIT_QUIT) | |
| 5843 begin_do_check_for_quit (); | |
| 5844 | |
| 5845 if (flags & INHIBIT_GC) | |
| 5846 begin_gc_forbidden (); | |
| 5847 | |
| 5848 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5849 inner one creates some buffers/etc., should the outer one be able | |
| 5850 to delete them? I think so, but it means we need to combine rather | |
| 5851 than just reset the value. */ | |
| 5852 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5853 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5854 | |
| 5855 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5856 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5857 | |
| 5858 return flags; | |
| 5859 } | |
| 5860 | |
| 853 | 5861 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5862 can be trapped or inhibited, according to FLAGS. | |
| 5863 | |
| 5864 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5865 the error is caught and a warning is issued, specifying the | |
| 5866 specific error that occurred and a backtrace. In that case, | |
| 5867 WARNING_STRING should be given, and will be printed at the | |
| 5868 beginning of the error to indicate where the error occurred. | |
| 5869 | |
| 5870 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5871 `throw' out of the function being called are trapped, and a warning | |
| 5872 issued. (Again, WARNING_STRING should be given.) | |
| 5873 | |
| 2367 | 5874 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5875 this applies to recursive invocations of call_trapping_problems, too. |
| 5876 | |
| 1333 | 5877 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5878 but values useful for generating a warning are still computed (in | |
| 5879 particular, the backtrace), so that the calling function can issue | |
| 5880 a warning. | |
| 5881 | |
| 853 | 5882 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5883 issued, but at level `debug', which normally is below the minimum | |
| 5884 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5885 be ignored entirely. The user can change this variable, however, | |
| 5886 to see the warnings.) | |
| 5887 | |
| 5888 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5889 given, you are *guaranteed* that there will be no non-local exits | |
| 5890 out of this function. | |
| 5891 | |
| 5892 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5893 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5894 automatically caught as well, and treated as an error; you can | |
| 5895 check for this using EQ (problems->error_conditions, Qquit). | |
| 5896 | |
| 5897 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5898 turned on. (It will abort the code being called, but will still be | |
| 5899 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5900 given.) This is useful when QUIT checking has been turned off by a | |
| 5901 higher-level caller. | |
| 5902 | |
| 5903 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5904 This is useful for Lisp called within redisplay, for example. |
| 853 | 5905 |
| 5906 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5907 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5908 or consoles that were already in existence at the time this function | |
| 5909 was called. (However, it's perfectly legal for code to create a new | |
| 5910 buffer and then delete it.) | |
| 5911 | |
| 5912 #### It might be useful to have a flag that inhibits deletion of a | |
| 5913 specific permanent display object and everything it's attached to | |
| 5914 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5915 attached to. | |
| 5916 | |
| 5917 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5918 code is not allowed to modify the text of any buffers that were | |
| 5919 already in existence at the time this function was called. | |
| 5920 (However, it's perfectly legal for code to create a new buffer and | |
| 5921 then modify its text.) | |
| 5922 | |
| 5923 [These last two flags are implemented using global variables | |
| 5924 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5925 which keep track of a list of all buffers or permanent display | |
| 5926 objects created since the last time one of these flags was set. | |
| 5927 The code that deletes buffers, etc. and modifies buffers checks | |
| 5928 | |
| 5929 (1) if the corresponding flag is set (through the global variable | |
| 5930 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5931 | |
| 5932 (2) if the object to be modified or deleted is not in the | |
| 5933 appropriate list. | |
| 5934 | |
| 5935 If so, it signals an error. | |
| 5936 | |
| 5937 Recursive calls to call_trapping_problems() are allowed. In | |
| 5938 the case of the two flags mentioned above, the current values | |
| 5939 of the global variables are stored in an unwind-protect, and | |
| 5940 they're reset to nil.] | |
| 5941 | |
| 5942 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5943 be entered if an error occurs inside the Lisp code being called, | |
| 5944 even when the user has requested an error. In such case, a warning | |
| 5945 is issued stating that access to the debugger is denied, unless | |
| 5946 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5947 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5948 in such cases either the display is in an inconsistent state or | |
| 5949 doing window operations is explicitly forbidden by the OS, and the | |
| 5950 debugger would causes visual changes on the screen and might create | |
| 5951 another frame. | |
| 5952 | |
| 5953 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5954 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5955 specifiers relating to display, other variables relating to | |
| 5956 display, splitting, deleting, or resizing windows or frames, | |
| 5957 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5958 allowed. This is for things called absolutely in the middle of | |
| 5959 redisplay, which expects things to be *exactly* the same after the | |
| 5960 call as before. This isn't completely implemented and needs to be | |
| 5961 thought out some more to determine exactly what its semantics are. | |
| 5962 For the moment, turning on this flag also turns on | |
| 5963 | |
| 5964 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5965 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5966 INHIBIT_ENTERING_DEBUGGER | |
| 5967 INHIBIT_WARNING_ISSUE | |
| 5968 INHIBIT_GC | |
| 5969 | |
| 5970 #### The following five flags are defined, but unimplemented: | |
| 5971 | |
| 5972 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5973 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5974 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5975 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5976 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5977 | |
| 5978 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5979 call_with_suspended_errors() was invoked. This exists only for | |
| 5980 debugging purposes -- often we want to break when a signal happens, | |
| 5981 but ignore signals from call_with_suspended_errors(), because they | |
| 5982 occur often and for legitimate reasons. | |
| 5983 | |
| 5984 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5985 which exact information about any occurring problems (either an | |
| 5986 error or an attempted throw past this boundary). | |
| 5987 | |
| 5988 If a problem occurred and aborted operation (error, quit, or | |
| 5989 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5990 from the call to (*fun) (arg) is returned. */ | |
| 5991 | |
| 5992 Lisp_Object | |
| 5993 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5994 const CIbyte *warning_string, |
| 853 | 5995 int flags, |
| 5996 struct call_trapping_problems_result *problem, | |
| 5997 Lisp_Object (*fun) (void *), | |
| 5998 void *arg) | |
| 5999 { | |
| 1318 | 6000 int speccount = specpdl_depth (); |
| 853 | 6001 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 6002 struct call_trapping_problems package; | |
| 1333 | 6003 struct call_trapping_problems_result real_problem; |
| 2532 | 6004 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 6005 int thrown = 0; |
| 6006 | |
| 6007 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 6008 assert (!NILP (warning_class)); | |
| 6009 | |
| 6010 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 6011 | |
| 6012 package.warning_class = warning_class; | |
| 6013 package.warning_string = warning_string; | |
| 6014 package.fun = fun; | |
| 6015 package.arg = arg; | |
| 6016 package.catchtag = | |
| 6017 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 6018 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 6019 Qnil; | |
| 6020 package.error_conditions = Qnil; | |
| 6021 package.data = Qnil; | |
| 6022 package.backtrace = Qnil; | |
| 6023 | |
| 1318 | 6024 flags = set_trapping_problems_flags (flags); |
| 853 | 6025 |
| 6026 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 6027 opaque = make_opaque_ptr (&package); | |
| 6028 else | |
| 6029 opaque = Qnil; | |
| 6030 | |
| 6031 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 6032 package.backtrace, opaque); | |
| 6033 | |
| 6034 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 6035 /* We need a catch so that our condition-handler can throw back here | |
| 6036 after printing the warning. (We print the warning in the stack | |
| 6037 context of the error, so we can get a backtrace.) */ | |
| 6038 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 6039 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6040 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 6041 /* We skip over the first wrapper, which traps errors. */ | |
| 6042 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 6043 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6044 else |
| 6045 /* Nothing special. */ | |
| 6046 tem = (fun) (arg); | |
| 6047 | |
| 1333 | 6048 if (!problem) |
| 6049 problem = &real_problem; | |
| 6050 | |
| 6051 if (!thrown) | |
| 853 | 6052 { |
| 1333 | 6053 problem->caught_error = 0; |
| 6054 problem->caught_throw = 0; | |
| 6055 problem->error_conditions = Qnil; | |
| 6056 problem->data = Qnil; | |
| 6057 problem->backtrace = Qnil; | |
| 6058 problem->thrown_tag = Qnil; | |
| 6059 problem->thrown_value = Qnil; | |
| 853 | 6060 } |
| 1333 | 6061 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 6062 { |
| 1333 | 6063 problem->caught_error = 1; |
| 6064 problem->caught_throw = 0; | |
| 6065 problem->error_conditions = package.error_conditions; | |
| 6066 problem->data = package.data; | |
| 6067 problem->backtrace = package.backtrace; | |
| 6068 problem->thrown_tag = Qnil; | |
| 6069 problem->thrown_value = Qnil; | |
| 853 | 6070 } |
| 1333 | 6071 else |
| 6072 { | |
| 6073 problem->caught_error = 0; | |
| 6074 problem->caught_throw = 1; | |
| 6075 problem->error_conditions = Qnil; | |
| 6076 problem->data = Qnil; | |
| 2532 | 6077 problem->backtrace = thrown_backtrace; |
| 1333 | 6078 problem->thrown_tag = thrown_tag; |
| 6079 problem->thrown_value = tem; | |
| 6080 } | |
| 6081 | |
| 6082 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6083 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6084 problem); | |
| 853 | 6085 |
| 6086 if (!NILP (package.catchtag) && | |
| 6087 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6088 free_opaque_ptr (package.catchtag); | |
| 6089 | |
| 6090 if (!NILP (opaque)) | |
| 6091 free_opaque_ptr (opaque); | |
| 6092 | |
| 6093 unbind_to (speccount); | |
| 6094 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6095 } | |
| 6096 | |
| 6097 struct va_call_trapping_problems | |
| 6098 { | |
| 6099 lisp_fn_t fun; | |
| 6100 int nargs; | |
| 6101 Lisp_Object *args; | |
| 6102 }; | |
| 6103 | |
| 6104 static Lisp_Object | |
| 6105 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6106 { | |
| 6107 struct va_call_trapping_problems *ai_no_corrida = | |
| 6108 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6109 Lisp_Object pegar_no_bumbum; | |
| 6110 | |
| 6111 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6112 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6113 return pegar_no_bumbum; | |
| 6114 } | |
| 6115 | |
| 6116 /* #### document me. */ | |
| 6117 | |
| 6118 Lisp_Object | |
| 6119 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6120 const CIbyte *warning_string, |
| 853 | 6121 int flags, |
| 6122 struct call_trapping_problems_result *problem, | |
| 6123 lisp_fn_t fun, int nargs, ...) | |
| 6124 { | |
| 6125 va_list vargs; | |
| 6126 Lisp_Object args[20]; | |
| 6127 int i; | |
| 6128 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6129 struct gcpro gcpro1; | |
| 6130 | |
| 6131 assert (nargs >= 0 && nargs < 20); | |
| 6132 | |
| 6133 va_start (vargs, nargs); | |
| 6134 for (i = 0; i < nargs; i++) | |
| 6135 args[i] = va_arg (vargs, Lisp_Object); | |
| 6136 va_end (vargs); | |
| 6137 | |
| 6138 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6139 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6140 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6141 | |
| 6142 GCPRO1_ARRAY (args, nargs); | |
| 6143 RETURN_UNGCPRO | |
| 6144 (call_trapping_problems | |
| 6145 (warning_class, warning_string, flags, problem, | |
| 6146 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6147 } | |
| 6148 | |
| 6149 /* this is an older interface, barely different from | |
| 6150 va_call_trapping_problems. | |
| 6151 | |
| 6152 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6153 va_call_trapping_problems(). */ | |
| 6154 | |
| 6155 Lisp_Object | |
| 6156 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6157 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6158 int nargs, ...) |
| 6159 { | |
| 6160 va_list vargs; | |
| 6161 Lisp_Object args[20]; | |
| 6162 int i; | |
| 6163 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6164 int flags; | |
| 6165 struct gcpro gcpro1; | |
| 6166 | |
| 1204 | 6167 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6168 assert (!NILP (class_)); | |
| 853 | 6169 assert (nargs >= 0 && nargs < 20); |
| 6170 | |
| 6171 va_start (vargs, nargs); | |
| 6172 for (i = 0; i < nargs; i++) | |
| 6173 args[i] = va_arg (vargs, Lisp_Object); | |
| 6174 va_end (vargs); | |
| 6175 | |
| 6176 /* If error-checking is not disabled, just call the function. */ | |
| 6177 | |
| 6178 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6179 { | |
| 6180 Lisp_Object val; | |
| 6181 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6182 return val; | |
| 6183 } | |
| 6184 | |
| 6185 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6186 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6187 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6188 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6189 else | |
| 6190 { | |
| 6191 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6192 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6193 } | |
| 6194 | |
| 6195 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6196 | |
| 6197 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6198 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6199 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6200 | |
| 6201 GCPRO1_ARRAY (args, nargs); | |
| 6202 { | |
| 6203 Lisp_Object its_way_too_goddamn_late = | |
| 6204 call_trapping_problems | |
| 1204 | 6205 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6206 &fazer_invocacao_atrapalhando_problemas); |
| 6207 UNGCPRO; | |
| 6208 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6209 return retval; | |
| 6210 else | |
| 6211 return its_way_too_goddamn_late; | |
| 6212 } | |
| 6213 } | |
| 6214 | |
| 6215 struct calln_trapping_problems | |
| 6216 { | |
| 6217 int nargs; | |
| 6218 Lisp_Object *args; | |
| 6219 }; | |
| 6220 | |
| 6221 static Lisp_Object | |
| 6222 calln_trapping_problems_1 (void *puta) | |
| 6223 { | |
| 6224 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6225 | |
| 6226 return Ffuncall (p->nargs, p->args); | |
| 428 | 6227 } |
| 6228 | |
| 6229 static Lisp_Object | |
| 853 | 6230 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6231 const CIbyte *warning_string, int flags, |
| 853 | 6232 struct call_trapping_problems_result *problem, |
| 6233 int nargs, Lisp_Object *args) | |
| 6234 { | |
| 6235 struct calln_trapping_problems foo; | |
| 6236 struct gcpro gcpro1; | |
| 6237 | |
| 6238 if (SYMBOLP (args[0])) | |
| 6239 { | |
| 6240 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6241 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6242 { | |
| 6243 if (problem) | |
| 6244 { | |
| 6245 problem->caught_error = 0; | |
| 6246 problem->caught_throw = 0; | |
| 6247 problem->error_conditions = Qnil; | |
| 6248 problem->data = Qnil; | |
| 6249 problem->backtrace = Qnil; | |
| 6250 problem->thrown_tag = Qnil; | |
| 6251 problem->thrown_value = Qnil; | |
| 6252 } | |
| 6253 return Qnil; | |
| 6254 } | |
| 6255 } | |
| 6256 | |
| 6257 foo.nargs = nargs; | |
| 6258 foo.args = args; | |
| 6259 | |
| 6260 GCPRO1_ARRAY (args, nargs); | |
| 6261 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6262 flags, problem, | |
| 6263 calln_trapping_problems_1, | |
| 6264 &foo)); | |
| 6265 } | |
| 6266 | |
| 6267 /* #### fix these functions to follow the calling convention of | |
| 6268 call_trapping_problems! */ | |
| 6269 | |
| 6270 Lisp_Object | |
| 867 | 6271 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6272 int flags) |
| 6273 { | |
| 6274 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6275 &function); | |
| 428 | 6276 } |
| 6277 | |
| 6278 Lisp_Object | |
| 867 | 6279 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6280 Lisp_Object object, int flags) |
| 6281 { | |
| 6282 Lisp_Object args[2]; | |
| 6283 | |
| 6284 args[0] = function; | |
| 6285 args[1] = object; | |
| 6286 | |
| 6287 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6288 args); | |
| 6289 } | |
| 6290 | |
| 6291 Lisp_Object | |
| 867 | 6292 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6293 Lisp_Object object1, Lisp_Object object2, |
| 6294 int flags) | |
| 6295 { | |
| 6296 Lisp_Object args[3]; | |
| 6297 | |
| 6298 args[0] = function; | |
| 6299 args[1] = object1; | |
| 6300 args[2] = object2; | |
| 6301 | |
| 6302 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6303 args); | |
| 6304 } | |
| 6305 | |
| 6306 Lisp_Object | |
| 867 | 6307 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6308 Lisp_Object object1, Lisp_Object object2, |
| 6309 Lisp_Object object3, int flags) | |
| 6310 { | |
| 6311 Lisp_Object args[4]; | |
| 6312 | |
| 6313 args[0] = function; | |
| 6314 args[1] = object1; | |
| 6315 args[2] = object2; | |
| 6316 args[3] = object3; | |
| 6317 | |
| 6318 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6319 args); | |
| 6320 } | |
| 6321 | |
| 6322 Lisp_Object | |
| 867 | 6323 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6324 Lisp_Object object1, Lisp_Object object2, |
| 6325 Lisp_Object object3, Lisp_Object object4, | |
| 6326 int flags) | |
| 6327 { | |
| 6328 Lisp_Object args[5]; | |
| 6329 | |
| 6330 args[0] = function; | |
| 6331 args[1] = object1; | |
| 6332 args[2] = object2; | |
| 6333 args[3] = object3; | |
| 6334 args[4] = object4; | |
| 6335 | |
| 6336 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6337 args); | |
| 6338 } | |
| 6339 | |
| 6340 Lisp_Object | |
| 867 | 6341 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6342 Lisp_Object object1, Lisp_Object object2, |
| 6343 Lisp_Object object3, Lisp_Object object4, | |
| 6344 Lisp_Object object5, int flags) | |
| 6345 { | |
| 6346 Lisp_Object args[6]; | |
| 6347 | |
| 6348 args[0] = function; | |
| 6349 args[1] = object1; | |
| 6350 args[2] = object2; | |
| 6351 args[3] = object3; | |
| 6352 args[4] = object4; | |
| 6353 args[5] = object5; | |
| 6354 | |
| 6355 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6356 args); | |
| 6357 } | |
| 6358 | |
| 6359 struct eval_in_buffer_trapping_problems | |
| 6360 { | |
| 6361 struct buffer *buf; | |
| 6362 Lisp_Object form; | |
| 6363 }; | |
| 6364 | |
| 6365 static Lisp_Object | |
| 6366 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6367 { | |
| 6368 struct eval_in_buffer_trapping_problems *p = | |
| 6369 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6370 | |
| 6371 return eval_in_buffer (p->buf, p->form); | |
| 6372 } | |
| 6373 | |
| 6374 /* #### fix these functions to follow the calling convention of | |
| 6375 call_trapping_problems! */ | |
| 6376 | |
| 6377 Lisp_Object | |
| 867 | 6378 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6379 struct buffer *buf, Lisp_Object form, |
| 6380 int flags) | |
| 6381 { | |
| 6382 struct eval_in_buffer_trapping_problems p; | |
| 6383 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6384 struct gcpro gcpro1, gcpro2; |
| 6385 | |
| 853 | 6386 GCPRO2 (buffer, form); |
| 6387 p.buf = buf; | |
| 6388 p.form = form; | |
| 6389 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6390 eval_in_buffer_trapping_problems_1, | |
| 6391 &p)); | |
| 6392 } | |
| 6393 | |
| 6394 Lisp_Object | |
| 1333 | 6395 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6396 Lisp_Object hook_symbol, |
| 6397 int flags) | |
| 6398 { | |
| 1333 | 6399 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6400 RUN_HOOKS_TO_COMPLETION, |
| 6401 flags); | |
| 428 | 6402 } |
| 6403 | |
| 6404 static Lisp_Object | |
| 853 | 6405 safe_run_hook_trapping_problems_1 (void *puta) |
| 6406 { | |
| 5013 | 6407 Lisp_Object hook = GET_LISP_FROM_VOID (puta); |
| 853 | 6408 |
| 6409 run_hook (hook); | |
| 428 | 6410 return Qnil; |
| 6411 } | |
| 6412 | |
| 853 | 6413 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6414 if an error occurs (but not a quit). */ | |
| 6415 | |
| 428 | 6416 Lisp_Object |
| 1333 | 6417 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6418 Lisp_Object hook_symbol, int flags) | |
| 853 | 6419 { |
| 428 | 6420 Lisp_Object tem; |
| 853 | 6421 struct gcpro gcpro1, gcpro2; |
| 6422 struct call_trapping_problems_result prob; | |
| 428 | 6423 |
| 6424 if (!initialized || preparing_for_armageddon) | |
| 6425 return Qnil; | |
| 6426 tem = find_symbol_value (hook_symbol); | |
| 6427 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6428 return Qnil; | |
| 6429 | |
| 853 | 6430 GCPRO2 (hook_symbol, tem); |
| 1333 | 6431 tem = call_trapping_problems (Qerror, NULL, |
| 6432 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6433 &prob, |
| 6434 safe_run_hook_trapping_problems_1, | |
| 5013 | 6435 STORE_LISP_IN_VOID (hook_symbol)); |
| 1333 | 6436 { |
| 6437 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6438 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6439 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6440 | |
| 6441 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6442 Qquit))) | |
| 6443 { | |
| 6444 Fset (hook_symbol, Qnil); | |
| 6445 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6446 } | |
| 6447 else | |
| 6448 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6449 | |
| 6450 | |
| 6451 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6452 &prob); | |
| 6453 } | |
| 6454 | |
| 6455 UNGCPRO; | |
| 6456 return tem; | |
| 853 | 6457 } |
| 6458 | |
| 6459 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6460 { | |
| 6461 struct buffer *buf; | |
| 6462 int nargs; | |
| 6463 Lisp_Object *args; | |
| 6464 enum run_hooks_condition cond; | |
| 6465 }; | |
| 6466 | |
| 6467 static Lisp_Object | |
| 6468 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6469 { | |
| 6470 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6471 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6472 | |
| 6473 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6474 porra->cond); | |
| 6475 } | |
| 6476 | |
| 6477 /* #### fix these functions to follow the calling convention of | |
| 6478 call_trapping_problems! */ | |
| 428 | 6479 |
| 6480 Lisp_Object | |
| 1333 | 6481 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6482 struct buffer *buf, int nargs, |
| 6483 Lisp_Object *args, | |
| 6484 enum run_hooks_condition cond, | |
| 6485 int flags) | |
| 6486 { | |
| 6487 Lisp_Object sym, val, ret; | |
| 6488 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6489 struct gcpro gcpro1; |
| 1333 | 6490 Lisp_Object hook_name; |
| 6491 Ibyte *hook_str; | |
| 6492 Ibyte *err; | |
| 428 | 6493 |
| 6494 if (!initialized || preparing_for_armageddon) | |
| 853 | 6495 /* We need to bail out of here pronto. */ |
| 428 | 6496 return Qnil; |
| 6497 | |
| 853 | 6498 GCPRO1_ARRAY (args, nargs); |
| 6499 | |
| 6500 sym = args[0]; | |
| 6501 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6502 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6503 | |
| 6504 if (UNBOUNDP (val) || NILP (val)) | |
| 6505 RETURN_UNGCPRO (ret); | |
| 6506 | |
| 6507 diversity_and_distrust.buf = buf; | |
| 6508 diversity_and_distrust.nargs = nargs; | |
| 6509 diversity_and_distrust.args = args; | |
| 6510 diversity_and_distrust.cond = cond; | |
| 6511 | |
| 1333 | 6512 hook_name = XSYMBOL_NAME (args[0]); |
| 6513 hook_str = XSTRING_DATA (hook_name); | |
| 6514 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6515 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6516 RETURN_UNGCPRO |
| 6517 (call_trapping_problems | |
| 1333 | 6518 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6519 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6520 &diversity_and_distrust)); | |
| 428 | 6521 } |
| 6522 | |
| 6523 Lisp_Object | |
| 1333 | 6524 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6525 int nargs, |
| 6526 Lisp_Object *args, | |
| 6527 enum run_hooks_condition cond, | |
| 6528 int flags) | |
| 6529 { | |
| 6530 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6531 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6532 } |
| 6533 | |
| 6534 Lisp_Object | |
| 1333 | 6535 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6536 Lisp_Object hook_var, |
| 6537 int nargs, ...) | |
| 6538 { | |
| 6539 /* This function can GC */ | |
| 6540 struct gcpro gcpro1; | |
| 6541 int i; | |
| 6542 va_list vargs; | |
| 6543 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6544 int flags; | |
| 6545 | |
| 6546 va_start (vargs, nargs); | |
| 6547 funcall_args[0] = hook_var; | |
| 6548 for (i = 0; i < nargs; i++) | |
| 6549 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6550 flags = va_arg (vargs, int); | |
| 6551 va_end (vargs); | |
| 6552 | |
| 6553 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6554 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6555 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6556 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6557 } |
| 6558 | |
| 6559 Lisp_Object | |
| 1333 | 6560 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6561 struct buffer *buf, |
| 6562 Lisp_Object hook_var, | |
| 6563 int nargs, ...) | |
| 6564 { | |
| 6565 /* This function can GC */ | |
| 6566 struct gcpro gcpro1; | |
| 6567 int i; | |
| 6568 va_list vargs; | |
| 6569 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6570 int flags; | |
| 6571 | |
| 6572 va_start (vargs, nargs); | |
| 6573 funcall_args[0] = hook_var; | |
| 6574 for (i = 0; i < nargs; i++) | |
| 6575 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6576 flags = va_arg (vargs, int); | |
| 6577 va_end (vargs); | |
| 6578 | |
| 6579 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6580 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6581 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6582 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6583 } |
| 6584 | |
| 6585 | |
| 6586 /************************************************************************/ | |
| 6587 /* The special binding stack */ | |
| 771 | 6588 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6589 /* When performance is critical, use the macros in backtrace.h. */ |
| 6590 /************************************************************************/ | |
| 6591 | |
| 6592 #define min_max_specpdl_size 400 | |
| 6593 | |
| 6594 void | |
| 647 | 6595 grow_specpdl (EMACS_INT reserved) |
| 6596 { | |
| 6597 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6598 if (size_needed >= max_specpdl_size) |
| 6599 { | |
| 6600 if (max_specpdl_size < min_max_specpdl_size) | |
| 6601 max_specpdl_size = min_max_specpdl_size; | |
| 6602 if (size_needed >= max_specpdl_size) | |
| 6603 { | |
| 1951 | 6604 /* Leave room for some specpdl in the debugger. */ |
| 6605 max_specpdl_size = size_needed + 100; | |
| 6606 if (max_specpdl_size > specpdl_size) | |
| 6607 { | |
| 6608 specpdl_size = max_specpdl_size; | |
| 6609 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6610 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6611 } | |
| 563 | 6612 signal_continuable_error |
| 6613 (Qstack_overflow, | |
| 6614 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6615 } |
| 6616 } | |
| 6617 while (specpdl_size < size_needed) | |
| 6618 { | |
| 6619 specpdl_size *= 2; | |
| 6620 if (specpdl_size > max_specpdl_size) | |
| 6621 specpdl_size = max_specpdl_size; | |
| 6622 } | |
| 6623 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6624 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6625 check_specbind_stack_sanity (); |
| 428 | 6626 } |
| 6627 | |
| 6628 | |
| 6629 /* Handle unbinding buffer-local variables */ | |
| 6630 static Lisp_Object | |
| 6631 specbind_unwind_local (Lisp_Object ovalue) | |
| 6632 { | |
| 6633 Lisp_Object current = Fcurrent_buffer (); | |
| 6634 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6635 Lisp_Object victim = ovalue; |
| 6636 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6637 ovalue = XCDR (victim); | |
| 428 | 6638 |
| 6639 free_cons (victim); | |
| 6640 | |
| 6641 if (NILP (buf)) | |
| 6642 { | |
| 6643 /* Deleted buffer -- do nothing */ | |
| 6644 } | |
| 6645 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6646 { | |
| 6647 /* Was buffer-local when binding was made, now no longer is. | |
| 6648 * (kill-local-variable can do this.) | |
| 6649 * Do nothing in this case. | |
| 6650 */ | |
| 6651 } | |
| 6652 else if (EQ (buf, current)) | |
| 6653 Fset (symbol, ovalue); | |
| 6654 else | |
| 6655 { | |
| 6656 /* Urk! Somebody switched buffers */ | |
| 6657 struct gcpro gcpro1; | |
| 6658 GCPRO1 (current); | |
| 6659 Fset_buffer (buf); | |
| 6660 Fset (symbol, ovalue); | |
| 6661 Fset_buffer (current); | |
| 6662 UNGCPRO; | |
| 6663 } | |
| 6664 return symbol; | |
| 6665 } | |
| 6666 | |
| 6667 static Lisp_Object | |
| 6668 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6669 { | |
| 6670 Lisp_Object current = Fcurrent_buffer (); | |
| 6671 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6672 | |
| 6673 buffer = get_buffer (buffer, 0); | |
| 6674 if (NILP (buffer)) | |
| 6675 { | |
| 6676 /* Deleted buffer -- do nothing */ | |
| 6677 } | |
| 6678 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6679 { | |
| 6680 /* Was buffer-local when binding was made, now no longer is. | |
| 6681 * (kill-local-variable can do this.) | |
| 6682 * Do nothing in this case. | |
| 6683 */ | |
| 6684 } | |
| 6685 else if (EQ (buffer, current)) | |
| 6686 Fkill_local_variable (symbol); | |
| 6687 else | |
| 6688 { | |
| 6689 /* Urk! Somebody switched buffers */ | |
| 6690 struct gcpro gcpro1; | |
| 6691 GCPRO1 (current); | |
| 6692 Fset_buffer (buffer); | |
| 6693 Fkill_local_variable (symbol); | |
| 6694 Fset_buffer (current); | |
| 6695 UNGCPRO; | |
| 6696 } | |
| 6697 return symbol; | |
| 6698 } | |
| 6699 | |
| 6700 | |
| 6701 void | |
| 6702 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6703 { | |
| 6704 SPECBIND (symbol, value); | |
| 853 | 6705 |
| 6706 check_specbind_stack_sanity (); | |
| 428 | 6707 } |
| 6708 | |
| 6709 void | |
| 6710 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6711 { | |
| 6712 int buffer_local = | |
| 6713 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6714 | |
| 6715 if (buffer_local == 0) | |
| 6716 { | |
| 6717 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6718 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6719 } |
| 6720 else if (buffer_local > 0) | |
| 6721 { | |
| 6722 /* Already buffer-local */ | |
| 6723 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6724 find_symbol_value (symbol)); | |
| 6725 specpdl_ptr->func = specbind_unwind_local; | |
| 6726 } | |
| 6727 else | |
| 6728 { | |
| 6729 /* About to become buffer-local */ | |
| 6730 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6731 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6732 } | |
| 6733 | |
| 6734 specpdl_ptr->symbol = symbol; | |
| 6735 specpdl_ptr++; | |
| 6736 specpdl_depth_counter++; | |
| 6737 | |
| 6738 Fset (symbol, value); | |
| 853 | 6739 |
| 6740 check_specbind_stack_sanity (); | |
| 428 | 6741 } |
| 6742 | |
| 771 | 6743 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6744 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6745 before your function returns normally, passing in the integer returned | |
| 6746 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6747 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6748 ignored. #### We should eliminate it entirely. */ | |
| 6749 | |
| 6750 int | |
| 428 | 6751 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6752 Lisp_Object arg) | |
| 6753 { | |
| 6754 SPECPDL_RESERVE (1); | |
| 6755 specpdl_ptr->func = function; | |
| 6756 specpdl_ptr->symbol = Qnil; | |
| 6757 specpdl_ptr->old_value = arg; | |
| 6758 specpdl_ptr++; | |
| 6759 specpdl_depth_counter++; | |
| 853 | 6760 check_specbind_stack_sanity (); |
| 771 | 6761 return specpdl_depth_counter - 1; |
| 6762 } | |
| 6763 | |
| 6764 static Lisp_Object | |
| 802 | 6765 restore_lisp_object (Lisp_Object cons) |
| 6766 { | |
| 5013 | 6767 Lisp_Object laddr = XCAR (cons); |
| 6768 Lisp_Object *addr = (Lisp_Object *) GET_VOID_FROM_LISP (laddr); | |
| 802 | 6769 *addr = XCDR (cons); |
| 853 | 6770 free_cons (cons); |
| 802 | 6771 return Qnil; |
| 6772 } | |
| 6773 | |
| 6774 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6775 by ADDR with the value VAL. */ | |
| 814 | 6776 static int |
| 802 | 6777 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6778 Lisp_Object val) | |
| 6779 { | |
| 5013 | 6780 /* We use a cons rather than a malloc()ed structure because we want the |
| 6781 Lisp object to have garbage-collection protection */ | |
| 6782 Lisp_Object laddr = STORE_VOID_IN_LISP (addr); | |
| 802 | 6783 return record_unwind_protect (restore_lisp_object, |
| 5013 | 6784 noseeum_cons (laddr, val)); |
| 802 | 6785 } |
| 6786 | |
| 6787 /* Similar to specbind() but for any C variable whose value is a | |
| 6788 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6789 pointed to by ADDR to its existing value, and then changes its | |
| 6790 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6791 pass this to unbind_to() after you are done. */ | |
| 6792 int | |
| 6793 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6794 { | |
| 6795 int count = specpdl_depth (); | |
| 6796 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6797 *addr = newval; | |
| 6798 return count; | |
| 6799 } | |
| 6800 | |
| 5013 | 6801 struct restore_int |
| 6802 { | |
| 6803 int *addr; | |
| 802 | 6804 int val; |
| 5013 | 6805 }; |
| 6806 | |
| 6807 static Lisp_Object | |
| 6808 restore_int (Lisp_Object obj) | |
| 6809 { | |
| 6810 struct restore_int *ri = (struct restore_int *) GET_VOID_FROM_LISP (obj); | |
| 6811 *(ri->addr) = ri->val; | |
| 6812 xfree (ri); | |
| 802 | 6813 return Qnil; |
| 6814 } | |
| 6815 | |
| 6816 /* Establish an unwind-protect which will restore the int pointed to | |
| 6817 by ADDR with the value VAL. This function works correctly with | |
| 6818 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6819 int |
| 802 | 6820 record_unwind_protect_restoring_int (int *addr, int val) |
| 6821 { | |
| 5013 | 6822 struct restore_int *ri = xnew (struct restore_int); |
| 6823 ri->addr = addr; | |
| 6824 ri->val = val; | |
| 6825 return record_unwind_protect (restore_int, STORE_VOID_IN_LISP (ri)); | |
| 802 | 6826 } |
| 6827 | |
| 6828 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6829 Sets up an unwind-protect to restore the variable pointed to by | |
| 6830 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6831 Returns the previous value of specpdl_depth(); pass this to | |
| 6832 unbind_to() after you are done. This function works correctly with | |
| 6833 all ints, even those that don't fit into a Lisp integer. */ | |
| 6834 int | |
| 6835 internal_bind_int (int *addr, int newval) | |
| 6836 { | |
| 6837 int count = specpdl_depth (); | |
| 6838 record_unwind_protect_restoring_int (addr, *addr); | |
| 6839 *addr = newval; | |
| 6840 return count; | |
| 6841 } | |
| 6842 | |
| 6843 static Lisp_Object | |
| 771 | 6844 free_pointer (Lisp_Object opaque) |
| 6845 { | |
| 5013 | 6846 void *ptr = GET_VOID_FROM_LISP (opaque); |
| 6847 xfree (ptr); | |
| 771 | 6848 return Qnil; |
| 6849 } | |
| 6850 | |
| 6851 /* Establish an unwind-protect which will free the specified block. | |
| 6852 */ | |
| 6853 int | |
| 6854 record_unwind_protect_freeing (void *ptr) | |
| 6855 { | |
| 5013 | 6856 return record_unwind_protect (free_pointer, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6857 } |
| 6858 | |
| 6859 static Lisp_Object | |
| 6860 free_dynarr (Lisp_Object opaque) | |
| 6861 { | |
| 5013 | 6862 Dynarr_free (GET_VOID_FROM_LISP (opaque)); |
| 771 | 6863 return Qnil; |
| 6864 } | |
| 6865 | |
| 6866 int | |
| 6867 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6868 { | |
| 5013 | 6869 return record_unwind_protect (free_dynarr, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6870 } |
| 428 | 6871 |
| 6872 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6873 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6874 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6875 Lisp_Object |
| 771 | 6876 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6877 { |
| 6878 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6879 check_specbind_stack_sanity (); |
| 428 | 6880 return value; |
| 6881 } | |
| 6882 | |
| 6883 /* Don't call this directly. | |
| 6884 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6885 void | |
| 6886 unbind_to_hairy (int count) | |
| 6887 { | |
| 442 | 6888 ++specpdl_ptr; |
| 6889 ++specpdl_depth_counter; | |
| 6890 | |
| 428 | 6891 while (specpdl_depth_counter != count) |
| 6892 { | |
| 1313 | 6893 Lisp_Object oquit = Qunbound; |
| 6894 | |
| 6895 /* Do this check BEFORE decrementing the values below, because once | |
| 6896 they're decremented, GC protection is lost on | |
| 6897 specpdl_ptr->old_value. */ | |
| 1322 | 6898 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6899 { |
| 6900 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6901 existing QUIT until afterwards. Only do this, however, for | |
| 6902 unwind-protects established by Lisp code, not by C code | |
| 6903 (e.g. free_opaque_ptr() or something), because the act of | |
| 6904 checking for QUIT can cause all sorts of weird things to | |
| 6905 happen, since it churns the event loop -- redisplay, running | |
| 6906 Lisp, etc. Code should not have to worry about this just | |
| 6907 because of establishing an unwind-protect. */ | |
| 6908 check_quit (); /* make Vquit_flag accurate */ | |
| 6909 oquit = Vquit_flag; | |
| 6910 Vquit_flag = Qnil; | |
| 6911 } | |
| 6912 | |
| 428 | 6913 --specpdl_ptr; |
| 6914 --specpdl_depth_counter; | |
| 6915 | |
| 1313 | 6916 /* #### At this point, there is no GC protection on old_value. This |
| 6917 could be a real problem, depending on what unwind-protect function | |
| 6918 is called. It looks like it just so happens that the ones | |
| 6919 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6920 we should look into fixing this. (Many unwind-protect functions | |
| 6921 free values. Is it a problem if freed values are | |
| 6922 GC-protected?) */ | |
| 428 | 6923 if (specpdl_ptr->func != 0) |
| 1313 | 6924 { |
| 6925 /* An unwind-protect */ | |
| 6926 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6927 } | |
| 6928 | |
| 428 | 6929 else |
| 6930 { | |
| 6931 /* We checked symbol for validity when we specbound it, | |
| 6932 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6933 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6934 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6935 sym->value = specpdl_ptr->old_value; | |
| 6936 else | |
| 6937 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6938 } | |
| 6939 | |
| 6940 #if 0 /* martin */ | |
| 6941 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6942 /* There should never be anything here for us to remove. | |
| 6943 If so, it indicates a logic error in Emacs. Catches | |
| 6944 should get removed when a throw or signal occurs, or | |
| 6945 when a catch or condition-case exits normally. But | |
| 6946 it's too dangerous to just remove this code. --ben */ | |
| 6947 | |
| 6948 /* Furthermore, this code is not in FSFmacs!!! | |
| 6949 Braino on mly's part? */ | |
| 6950 /* If we're unwound past the pdlcount of a catch frame, | |
| 6951 that catch can't possibly still be valid. */ | |
| 6952 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6953 { | |
| 6954 catchlist = catchlist->next; | |
| 6955 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6956 } | |
| 6957 #endif | |
| 6958 #endif | |
| 1313 | 6959 |
| 6960 if (!UNBOUNDP (oquit)) | |
| 6961 Vquit_flag = oquit; | |
| 428 | 6962 } |
| 853 | 6963 check_specbind_stack_sanity (); |
| 428 | 6964 } |
| 6965 | |
| 6966 | |
| 6967 | |
| 6968 /* Get the value of symbol's global binding, even if that binding is | |
| 6969 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6970 | |
| 6971 Lisp_Object | |
| 6972 top_level_value (Lisp_Object symbol) | |
| 6973 { | |
| 6974 REGISTER struct specbinding *ptr = specpdl; | |
| 6975 | |
| 6976 CHECK_SYMBOL (symbol); | |
| 6977 for (; ptr != specpdl_ptr; ptr++) | |
| 6978 { | |
| 6979 if (EQ (ptr->symbol, symbol)) | |
| 6980 return ptr->old_value; | |
| 6981 } | |
| 6982 return XSYMBOL (symbol)->value; | |
| 6983 } | |
| 6984 | |
| 6985 #if 0 | |
| 6986 | |
| 6987 Lisp_Object | |
| 6988 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6989 { | |
| 6990 REGISTER struct specbinding *ptr = specpdl; | |
| 6991 | |
| 6992 CHECK_SYMBOL (symbol); | |
| 6993 for (; ptr != specpdl_ptr; ptr++) | |
| 6994 { | |
| 6995 if (EQ (ptr->symbol, symbol)) | |
| 6996 { | |
| 6997 ptr->old_value = newval; | |
| 6998 return newval; | |
| 6999 } | |
| 7000 } | |
| 7001 return Fset (symbol, newval); | |
| 7002 } | |
| 7003 | |
| 7004 #endif /* 0 */ | |
| 7005 | |
| 7006 | |
| 7007 /************************************************************************/ | |
| 7008 /* Backtraces */ | |
| 7009 /************************************************************************/ | |
| 7010 | |
| 7011 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 7012 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 7013 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 7014 */ | |
| 7015 (level, flag)) | |
| 7016 { | |
| 7017 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7018 REGISTER int i; | |
| 7019 | |
| 7020 CHECK_INT (level); | |
| 7021 | |
| 7022 for (i = 0; backlist && i < XINT (level); i++) | |
| 7023 { | |
| 7024 backlist = backlist->next; | |
| 7025 } | |
| 7026 | |
| 7027 if (backlist) | |
| 7028 backlist->debug_on_exit = !NILP (flag); | |
| 7029 | |
| 7030 return flag; | |
| 7031 } | |
| 7032 | |
| 7033 static void | |
| 7034 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 7035 { | |
| 7036 int printing_bindings = 0; | |
| 7037 | |
| 7038 for (; speccount > speclimit; speccount--) | |
| 7039 { | |
| 7040 if (specpdl[speccount - 1].func == 0 | |
| 7041 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7042 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7043 { | |
|
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7044 write_ascstring (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7045 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7046 printing_bindings = 1; | |
| 7047 } | |
| 7048 else | |
| 7049 { | |
|
4952
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Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
7050 if (printing_bindings) write_ascstring (stream, ")\n"); |
|
19a72041c5ed
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4846
diff
changeset
|
7051 write_ascstring (stream, " # (unwind-protect ...)\n"); |
| 428 | 7052 printing_bindings = 0; |
| 7053 } | |
| 7054 } | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7055 if (printing_bindings) write_ascstring (stream, ")\n"); |
| 428 | 7056 } |
| 7057 | |
| 1292 | 7058 static Lisp_Object |
| 7059 backtrace_unevalled_args (Lisp_Object *args) | |
| 7060 { | |
| 7061 if (args) | |
| 7062 return *args; | |
| 7063 else | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4846
diff
changeset
|
7064 return list1 (build_ascstring ("[internal]")); |
| 1292 | 7065 } |
| 7066 | |
| 428 | 7067 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7068 Print a trace of Lisp function calls currently active. | |
| 438 | 7069 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7070 and defaults to the value of `standard-output'. |
| 7071 Optional second arg DETAILED non-nil means show places where currently | |
| 7072 active variable bindings, catches, condition-cases, and | |
| 7073 unwind-protects, as well as function calls, were made. | |
| 428 | 7074 */ |
| 7075 (stream, detailed)) | |
| 7076 { | |
| 7077 /* This function can GC */ | |
| 7078 struct backtrace *backlist = backtrace_list; | |
| 7079 struct catchtag *catches = catchlist; | |
| 7080 int speccount = specpdl_depth(); | |
| 7081 | |
| 7082 int old_nl = print_escape_newlines; | |
| 7083 int old_pr = print_readably; | |
| 7084 Lisp_Object old_level = Vprint_level; | |
| 7085 Lisp_Object oiq = Vinhibit_quit; | |
| 7086 struct gcpro gcpro1, gcpro2; | |
| 7087 | |
| 7088 /* We can't allow quits in here because that could cause the values | |
| 7089 of print_readably and print_escape_newlines to get screwed up. | |
| 7090 Normally we would use a record_unwind_protect but that would | |
| 7091 screw up the functioning of this function. */ | |
| 7092 Vinhibit_quit = Qt; | |
| 7093 | |
| 7094 entering_debugger = 0; | |
| 7095 | |
| 872 | 7096 if (!NILP (detailed)) |
| 7097 Vprint_level = make_int (50); | |
| 7098 else | |
| 7099 Vprint_level = make_int (3); | |
| 428 | 7100 print_readably = 0; |
| 7101 print_escape_newlines = 1; | |
| 7102 | |
| 7103 GCPRO2 (stream, old_level); | |
| 7104 | |
| 1261 | 7105 stream = canonicalize_printcharfun (stream); |
| 428 | 7106 |
| 7107 for (;;) | |
| 7108 { | |
| 7109 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7110 { | |
| 7111 int catchpdl = catches->pdlcount; | |
| 438 | 7112 if (speccount > catchpdl |
| 7113 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7114 /* This is a condition-case catchpoint */ |
| 7115 catchpdl = catchpdl + 1; | |
| 7116 | |
| 7117 backtrace_specials (speccount, catchpdl, stream); | |
| 7118 | |
| 7119 speccount = catches->pdlcount; | |
| 7120 if (catchpdl == speccount) | |
| 7121 { | |
|
4952
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7122 write_ascstring (stream, " # (catch "); |
| 428 | 7123 Fprin1 (catches->tag, stream); |
|
4952
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Mule-izing, various fixes related to char * arguments
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4846
diff
changeset
|
7124 write_ascstring (stream, " ...)\n"); |
| 428 | 7125 } |
| 7126 else | |
| 7127 { | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7128 write_ascstring (stream, " # (condition-case ... . "); |
| 428 | 7129 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7130 write_ascstring (stream, ")\n"); |
| 428 | 7131 } |
| 7132 catches = catches->next; | |
| 7133 } | |
| 7134 else if (!backlist) | |
| 7135 break; | |
| 7136 else | |
| 7137 { | |
| 7138 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7139 { | |
| 7140 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7141 speccount = backlist->pdlcount; | |
| 7142 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7143 write_ascstring (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7144 if (backlist->nargs == UNEVALLED) |
| 7145 { | |
| 1292 | 7146 Fprin1 (Fcons (*backlist->function, |
| 7147 backtrace_unevalled_args (backlist->args)), | |
| 7148 stream); | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7149 write_ascstring (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7150 } |
| 7151 else | |
| 7152 { | |
| 7153 Lisp_Object tem = *backlist->function; | |
| 7154 Fprin1 (tem, stream); /* This can QUIT */ | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7155 write_ascstring (stream, "("); |
| 428 | 7156 if (backlist->nargs == MANY) |
| 7157 { | |
| 7158 int i; | |
| 7159 Lisp_Object tail = Qnil; | |
| 7160 struct gcpro ngcpro1; | |
| 7161 | |
| 7162 NGCPRO1 (tail); | |
| 7163 for (tail = *backlist->args, i = 0; | |
| 7164 !NILP (tail); | |
| 7165 tail = Fcdr (tail), i++) | |
| 7166 { | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7167 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7168 Fprin1 (Fcar (tail), stream); |
| 7169 } | |
| 7170 NUNGCPRO; | |
| 7171 } | |
| 7172 else | |
| 7173 { | |
| 7174 int i; | |
| 7175 for (i = 0; i < backlist->nargs; i++) | |
| 7176 { | |
| 826 | 7177 if (!i && EQ (tem, Qbyte_code)) |
| 7178 { | |
|
4952
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Mule-izing, various fixes related to char * arguments
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parents:
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diff
changeset
|
7179 write_ascstring (stream, "\"...\""); |
| 826 | 7180 continue; |
| 7181 } | |
|
4952
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Mule-izing, various fixes related to char * arguments
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4846
diff
changeset
|
7182 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7183 Fprin1 (backlist->args[i], stream); |
| 7184 } | |
| 7185 } | |
|
4952
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Mule-izing, various fixes related to char * arguments
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diff
changeset
|
7186 write_ascstring (stream, ")\n"); |
| 428 | 7187 } |
| 7188 backlist = backlist->next; | |
| 7189 } | |
| 7190 } | |
| 7191 Vprint_level = old_level; | |
| 7192 print_readably = old_pr; | |
| 7193 print_escape_newlines = old_nl; | |
| 7194 UNGCPRO; | |
| 7195 Vinhibit_quit = oiq; | |
| 7196 return Qnil; | |
| 7197 } | |
| 7198 | |
| 7199 | |
| 444 | 7200 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7201 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
|
7202 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
|
7203 operator), the value is (nil FUNCTION ARG-FORMS...). |
| 428 | 7204 If that frame has evaluated its arguments and called its function already, |
| 7205 the value is (t FUNCTION ARG-VALUES...). | |
| 7206 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7207 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7208 or a lambda expression for macro calls. | |
| 444 | 7209 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7210 */ |
| 7211 (nframes)) | |
| 7212 { | |
| 7213 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7214 REGISTER int i; | |
| 7215 Lisp_Object tem; | |
| 7216 | |
|
5307
c096d8051f89
Have NATNUMP give t for positive bignums; check limits appropriately.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5265
diff
changeset
|
7217 check_integer_range (nframes, Qzero, make_integer (EMACS_INT_MAX)); |
| 428 | 7218 |
| 7219 /* Find the frame requested. */ | |
| 7220 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7221 backlist = backlist->next; | |
| 7222 | |
| 7223 if (!backlist) | |
| 7224 return Qnil; | |
| 7225 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7226 return Fcons (Qnil, Fcons (*backlist->function, |
| 7227 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7228 else |
| 7229 { | |
| 7230 if (backlist->nargs == MANY) | |
| 7231 tem = *backlist->args; | |
| 7232 else | |
| 7233 tem = Flist (backlist->nargs, backlist->args); | |
| 7234 | |
| 7235 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7236 } | |
| 7237 } | |
| 7238 | |
| 7239 | |
| 7240 /************************************************************************/ | |
| 7241 /* Warnings */ | |
| 7242 /************************************************************************/ | |
| 7243 | |
| 1123 | 7244 static int |
| 7245 warning_will_be_discarded (Lisp_Object level) | |
| 7246 { | |
| 7247 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7248 to avoid excessive consing. */ | |
| 7249 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7250 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7251 } | |
| 7252 | |
| 428 | 7253 void |
| 1204 | 7254 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7255 Lisp_Object obj) |
| 7256 { | |
| 1123 | 7257 if (warning_will_be_discarded (level)) |
| 793 | 7258 return; |
| 1123 | 7259 |
| 1204 | 7260 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7261 if (NILP (Vpending_warnings)) |
| 7262 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7263 else | |
| 7264 { | |
| 7265 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7266 Vpending_warnings_tail = obj; | |
| 7267 } | |
| 7268 } | |
| 7269 | |
| 7270 /* #### This should probably accept Lisp objects; but then we have | |
| 7271 to make sure that Feval() isn't called, since it might not be safe. | |
| 7272 | |
| 7273 An alternative approach is to just pass some non-string type of | |
| 7274 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7275 automatically be called when it is safe to do so. */ | |
| 7276 | |
| 7277 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7278 warn_when_safe (Lisp_Object class_, Lisp_Object level, const Ascbyte *fmt, ...) |
| 428 | 7279 { |
| 7280 Lisp_Object obj; | |
| 7281 va_list args; | |
| 7282 | |
| 1123 | 7283 if (warning_will_be_discarded (level)) |
| 793 | 7284 return; |
| 1123 | 7285 |
| 428 | 7286 va_start (args, fmt); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7287 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 7288 va_end (args); |
| 7289 | |
| 1204 | 7290 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7291 } |
| 7292 | |
| 7293 | |
| 7294 | |
| 7295 | |
| 7296 /************************************************************************/ | |
| 7297 /* Initialization */ | |
| 7298 /************************************************************************/ | |
| 7299 | |
| 7300 void | |
| 7301 syms_of_eval (void) | |
| 7302 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
7303 INIT_LISP_OBJECT (subr); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
7304 INIT_LISP_OBJECT (multiple_value); |
| 442 | 7305 |
| 563 | 7306 DEFSYMBOL (Qinhibit_quit); |
| 7307 DEFSYMBOL (Qautoload); | |
| 7308 DEFSYMBOL (Qdebug_on_error); | |
| 7309 DEFSYMBOL (Qstack_trace_on_error); | |
| 7310 DEFSYMBOL (Qdebug_on_signal); | |
| 7311 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7312 DEFSYMBOL (Qdebugger); | |
| 7313 DEFSYMBOL (Qmacro); | |
| 428 | 7314 defsymbol (&Qand_rest, "&rest"); |
| 7315 defsymbol (&Qand_optional, "&optional"); | |
| 7316 /* Note that the process code also uses Qexit */ | |
| 563 | 7317 DEFSYMBOL (Qexit); |
| 7318 DEFSYMBOL (Qsetq); | |
| 7319 DEFSYMBOL (Qinteractive); | |
| 7320 DEFSYMBOL (Qcommandp); | |
| 7321 DEFSYMBOL (Qdefun); | |
| 7322 DEFSYMBOL (Qprogn); | |
| 7323 DEFSYMBOL (Qvalues); | |
| 7324 DEFSYMBOL (Qdisplay_warning); | |
| 7325 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7326 DEFSYMBOL (Qfinalize_list); |
| 563 | 7327 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7328 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7329 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7330 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7331 |
| 7332 DEFSUBR (For); | |
| 7333 DEFSUBR (Fand); | |
| 7334 DEFSUBR (Fif); | |
| 7335 DEFSUBR_MACRO (Fwhen); | |
| 7336 DEFSUBR_MACRO (Funless); | |
| 7337 DEFSUBR (Fcond); | |
| 7338 DEFSUBR (Fprogn); | |
| 7339 DEFSUBR (Fprog1); | |
| 7340 DEFSUBR (Fprog2); | |
| 7341 DEFSUBR (Fsetq); | |
| 7342 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7343 DEFSUBR (Fquote_maybe); |
| 428 | 7344 DEFSUBR (Ffunction); |
| 7345 DEFSUBR (Fdefun); | |
| 7346 DEFSUBR (Fdefmacro); | |
| 7347 DEFSUBR (Fdefvar); | |
| 7348 DEFSUBR (Fdefconst); | |
| 7349 DEFSUBR (Flet); | |
| 7350 DEFSUBR (FletX); | |
| 7351 DEFSUBR (Fwhile); | |
| 7352 DEFSUBR (Fmacroexpand_internal); | |
| 7353 DEFSUBR (Fcatch); | |
| 7354 DEFSUBR (Fthrow); | |
| 7355 DEFSUBR (Funwind_protect); | |
| 7356 DEFSUBR (Fcondition_case); | |
| 7357 DEFSUBR (Fcall_with_condition_handler); | |
| 7358 DEFSUBR (Fsignal); | |
| 7359 DEFSUBR (Finteractive_p); | |
| 7360 DEFSUBR (Fcommandp); | |
| 7361 DEFSUBR (Fcommand_execute); | |
| 7362 DEFSUBR (Fautoload); | |
| 7363 DEFSUBR (Feval); | |
| 7364 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7365 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7366 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7367 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7368 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7369 DEFSUBR (Fvalues_list); |
| 428 | 7370 DEFSUBR (Ffuncall); |
| 7371 DEFSUBR (Ffunctionp); | |
| 7372 DEFSUBR (Ffunction_min_args); | |
| 7373 DEFSUBR (Ffunction_max_args); | |
| 7374 DEFSUBR (Frun_hooks); | |
| 7375 DEFSUBR (Frun_hook_with_args); | |
| 7376 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7377 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7378 DEFSUBR (Fbacktrace_debug); | |
| 7379 DEFSUBR (Fbacktrace); | |
| 7380 DEFSUBR (Fbacktrace_frame); | |
| 7381 } | |
| 7382 | |
| 7383 void | |
| 814 | 7384 init_eval_semi_early (void) |
| 428 | 7385 { |
| 7386 specpdl_ptr = specpdl; | |
| 7387 specpdl_depth_counter = 0; | |
| 7388 catchlist = 0; | |
| 7389 Vcondition_handlers = Qnil; | |
| 7390 backtrace_list = 0; | |
| 7391 Vquit_flag = Qnil; | |
| 7392 debug_on_next_call = 0; | |
| 7393 lisp_eval_depth = 0; | |
| 7394 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7395 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7396 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7397 multiple_value_current_limit = 1; |
| 428 | 7398 } |
| 7399 | |
| 7400 void | |
| 7401 reinit_vars_of_eval (void) | |
| 7402 { | |
| 7403 preparing_for_armageddon = 0; | |
| 7404 in_warnings = 0; | |
| 7405 specpdl_size = 50; | |
| 7406 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7407 /* XEmacs change: increase these values. */ | |
| 7408 max_specpdl_size = 3000; | |
| 442 | 7409 max_lisp_eval_depth = 1000; |
| 7410 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7411 throw_level = 0; |
| 7412 #endif | |
| 2367 | 7413 init_eval_semi_early (); |
| 428 | 7414 } |
| 7415 | |
| 7416 void | |
| 7417 vars_of_eval (void) | |
| 7418 { | |
| 7419 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7420 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7421 */ ); | |
| 7422 | |
| 7423 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7424 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7425 This limit is to catch infinite recursions for you before they cause | |
| 7426 actual stack overflow in C, which would be fatal for Emacs. | |
| 7427 You can safely make it considerably larger than its default value, | |
| 7428 if that proves inconveniently small. | |
| 7429 */ ); | |
| 7430 | |
| 7431 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7432 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7433 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7434 Normally, you do not need to set this value yourself. It is set to | |
| 7435 t each time a Control-G is detected, and to `critical' each time a | |
| 7436 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7437 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7438 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7439 it's correct to do so. |
| 428 | 7440 */ ); |
| 7441 Vquit_flag = Qnil; | |
| 7442 | |
| 7443 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7444 Non-nil inhibits C-g quitting from happening immediately. | |
| 7445 Note that `quit-flag' will still be set by typing C-g, | |
| 7446 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7447 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7448 before making `inhibit-quit' nil. |
| 7449 | |
| 7450 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7451 requested by typing control-shift-G in a window-system frame; | |
| 7452 this is explained in more detail in `quit-flag'. | |
| 428 | 7453 */ ); |
| 7454 Vinhibit_quit = Qnil; | |
| 7455 | |
| 7456 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7457 *Non-nil means automatically display a backtrace buffer | |
| 7458 after any error that is not handled by a `condition-case'. | |
| 7459 If the value is a list, an error only means to display a backtrace | |
| 7460 if one of its condition symbols appears in the list. | |
| 7461 See also variable `stack-trace-on-signal'. | |
| 7462 */ ); | |
| 7463 Vstack_trace_on_error = Qnil; | |
| 7464 | |
| 7465 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7466 *Non-nil means automatically display a backtrace buffer | |
| 7467 after any error that is signalled, whether or not it is handled by | |
| 7468 a `condition-case'. | |
| 7469 If the value is a list, an error only means to display a backtrace | |
| 7470 if one of its condition symbols appears in the list. | |
| 7471 See also variable `stack-trace-on-error'. | |
| 7472 */ ); | |
| 7473 Vstack_trace_on_signal = Qnil; | |
| 7474 | |
| 7475 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7476 *List of errors for which the debugger should not be called. | |
| 7477 Each element may be a condition-name or a regexp that matches error messages. | |
| 7478 If any element applies to a given error, that error skips the debugger | |
| 7479 and just returns to top level. | |
| 7480 This overrides the variable `debug-on-error'. | |
| 7481 It does not apply to errors handled by `condition-case'. | |
| 7482 */ ); | |
| 7483 Vdebug_ignored_errors = Qnil; | |
| 7484 | |
| 7485 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7486 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7487 The debugger will not be entered if the error is handled by | |
| 7488 a `condition-case'. | |
| 7489 If the value is a list, an error only means to enter the debugger | |
| 7490 if one of its condition symbols appears in the list. | |
| 7491 This variable is overridden by `debug-ignored-errors'. | |
| 7492 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7493 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7494 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
|
7495 (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
|
7496 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
|
7497 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
|
7498 |
| 1123 | 7499 If this variable is set while XEmacs is running noninteractively (using |
| 7500 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7501 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7502 obviously won't work), XEmacs will break out to a C debugger using | |
| 7503 \(force-debugging-signal t). This is useful because debugging | |
| 7504 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7505 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7506 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7507 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7508 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7509 is about to die anyway, and if no debugger is present, this will usefully | |
| 7510 dump core.) The most useful way to set this flag when debugging | |
| 7511 noninteractive runs, especially in makefiles, is using the environment | |
| 7512 variable XEMACSDEBUG, like this: | |
| 771 | 7513 |
| 7514 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7515 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7516 */ ); |
| 7517 Vdebug_on_error = Qnil; | |
| 7518 | |
| 7519 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7520 *Non-nil means enter debugger if an error is signalled. | |
| 7521 The debugger will be entered whether or not the error is handled by | |
| 7522 a `condition-case'. | |
| 7523 If the value is a list, an error only means to enter the debugger | |
| 7524 if one of its condition symbols appears in the list. | |
| 7525 See also variable `debug-on-quit'. | |
| 1123 | 7526 |
| 7527 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7528 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7529 */ ); |
| 7530 Vdebug_on_signal = Qnil; | |
| 7531 | |
| 7532 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7533 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7534 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7535 debugger can also be achieved at any time (for X11 console) by typing | |
| 7536 control-shift-G to signal a critical quit. | |
| 7537 */ ); | |
| 7538 debug_on_quit = 0; | |
| 7539 | |
| 7540 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7541 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7542 */ ); | |
| 7543 | |
| 1292 | 7544 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7545 &backtrace_with_internal_sections /* | |
| 7546 Non-nil means backtraces will contain additional information indicating | |
| 7547 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7548 byte-char conversion, internal-external conversion, etc. This can be | |
| 7549 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7550 */ ); | |
| 7551 #ifdef ERROR_CHECK_STRUCTURES | |
| 7552 backtrace_with_internal_sections = 1; | |
| 7553 #else | |
| 7554 backtrace_with_internal_sections = 0; | |
| 7555 #endif | |
| 7556 | |
| 428 | 7557 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7558 Function to call to invoke debugger. | |
| 7559 If due to frame exit, args are `exit' and the value being returned; | |
| 7560 this function's value will be returned instead of that. | |
| 7561 If due to error, args are `error' and a list of the args to `signal'. | |
| 7562 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7563 If due to `eval' entry, one arg, t. | |
| 7564 */ ); | |
| 7565 Vdebugger = Qnil; | |
| 7566 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7567 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
|
7568 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
|
7569 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7570 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
|
7571 macros and special operators. |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7572 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7573 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
|
7574 |
| 853 | 7575 staticpro (&Vcatch_everything_tag); |
| 7576 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7577 | |
| 428 | 7578 staticpro (&Vpending_warnings); |
| 7579 Vpending_warnings = Qnil; | |
| 1204 | 7580 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7581 Vpending_warnings_tail = Qnil; |
| 7582 | |
| 793 | 7583 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7584 Vlog_warning_minimum_level = Qinfo; | |
| 7585 | |
| 428 | 7586 staticpro (&Vautoload_queue); |
| 7587 Vautoload_queue = Qnil; | |
| 7588 | |
| 7589 staticpro (&Vcondition_handlers); | |
| 7590 | |
| 853 | 7591 staticpro (&Vdeletable_permanent_display_objects); |
| 7592 Vdeletable_permanent_display_objects = Qnil; | |
| 7593 | |
| 7594 staticpro (&Vmodifiable_buffers); | |
| 7595 Vmodifiable_buffers = Qnil; | |
| 7596 | |
| 7597 inhibit_flags = 0; | |
| 7598 } |