Mercurial > hg > xemacs-beta
annotate src/eval.c @ 5247:02d875ebd1ea
Make Lisp reader errors more informative with over-long hex, octal characters
src/ChangeLog addition:
2010-08-21 Aidan Kehoe <kehoea@parhasard.net>
* lread.c (read_escape):
Make error messages better reflect the text that was encountered,
when overlong hex character escapes or non-Latin-1 octal character
escapes are encountered.
man/ChangeLog addition:
2010-08-21 Aidan Kehoe <kehoea@parhasard.net>
* lispref/objects.texi (Character Type):
Go into more detail here on the specific type of error provoked on
overlong hex character escapes and non-Latin-1 octal character
escapes; give details of why the latter may be encountered, and
what to do with such code.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Sat, 21 Aug 2010 19:02:44 +0100 |
| parents | 18c0b5909d16 |
| children | 5663ae9a8989 |
| rev | line source |
|---|---|
| 428 | 1 /* Evaluator for XEmacs Lisp interpreter. |
| 2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
|
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4 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2010 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
| 8 XEmacs is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 10 Free Software Foundation; either version 2, or (at your option) any | |
| 11 later version. | |
| 12 | |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with XEmacs; see the file COPYING. If not, write to | |
| 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 Boston, MA 02111-1307, USA. */ | |
| 22 | |
| 23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */ | |
| 24 | |
| 853 | 25 /* Authorship: |
| 26 | |
| 27 Based on code from pre-release FSF 19, c. 1991. | |
| 28 Some work by Richard Mlynarik long ago (c. 1993?) -- | |
| 29 added call-with-condition-handler; synch. up to released FSF 19.7 | |
| 30 for lemacs 19.8. some signal changes. | |
| 31 Various work by Ben Wing, 1995-1996: | |
| 32 added all stuff dealing with trapping errors, suspended-errors, etc. | |
| 33 added most Fsignal front ends. | |
| 34 added warning code. | |
| 35 reworked the Fsignal code and synched the rest up to FSF 19.30. | |
| 36 Some changes by Martin Buchholz c. 1999? | |
| 37 e.g. PRIMITIVE_FUNCALL macros. | |
| 38 New call_trapping_problems code and large comments below | |
| 39 by Ben Wing, Mar-Apr 2000. | |
| 40 */ | |
| 41 | |
| 42 /* This file has been Mule-ized. */ | |
| 43 | |
| 44 /* What is in this file? | |
| 45 | |
| 46 This file contains the engine for the ELisp interpreter in XEmacs. | |
| 47 The engine does the actual work of implementing function calls, | |
| 48 form evaluation, non-local exits (catch, throw, signal, | |
| 49 condition-case, call-with-condition-handler), unwind-protects, | |
| 50 dynamic bindings, let constructs, backtraces, etc. You might say | |
| 51 that this module is the very heart of XEmacs, and everything else | |
| 52 in XEmacs is merely an auxiliary module implementing some specific | |
| 53 functionality that may be called from the heart at an appropriate | |
| 54 time. | |
| 55 | |
| 56 The only exception is the alloc.c module, which implements the | |
| 57 framework upon which this module (eval.c) works. alloc.c works | |
| 58 with creating the actual Lisp objects themselves and garbage | |
| 1960 | 59 collecting them as necessary, presenting a nice, high-level |
| 853 | 60 interface for object creation, deletion, access, and modification. |
| 61 | |
| 62 The only other exception that could be cited is the event-handling | |
| 63 module in event-stream.c. From its perspective, it is also the | |
| 64 heart of XEmacs, and controls exactly what gets done at what time. | |
| 65 From its perspective, eval.c is merely one of the auxiliary modules | |
| 66 out there that can be invoked by event-stream.c. | |
| 67 | |
| 68 Although the event-stream-centric view is a convenient fiction that | |
| 69 makes sense particularly from the user's perspective and from the | |
| 70 perspective of time, the engine-centric view is actually closest to | |
| 71 the truth, because anywhere within the event-stream module, you are | |
| 72 still somewhere in a Lisp backtrace, and event-loops are begun by | |
| 73 functions such as `command-loop-1', a Lisp function. | |
| 74 | |
| 75 As the Lisp engine is doing its thing, it maintains the state of | |
| 1960 | 76 the engine primarily in five list-like items, which are: |
| 853 | 77 |
| 78 -- the backtrace list | |
| 79 -- the catchtag list | |
| 80 -- the condition-handler list | |
| 81 -- the specbind list | |
| 82 -- the GCPRO list. | |
| 83 | |
| 84 These are described in detail in the next comment. | |
| 85 | |
| 86 --ben | |
| 87 */ | |
| 88 | |
| 89 /* Note that there are five separate lists used to maintain state in | |
| 90 the evaluator. All of them conceptually are stacks (last-in, | |
| 91 first-out). All non-local exits happen ultimately through the | |
| 92 catch/throw mechanism, which uses one of the five lists (the | |
| 93 catchtag list) and records the current state of the others in each | |
| 94 frame of the list (some other information is recorded and restored | |
| 95 as well, such as the current eval depth), so that all the state of | |
| 96 the evaluator is restored properly when a non-local exit occurs. | |
| 97 (Note that the current state of the condition-handler list is not | |
| 98 recorded in the catchtag list. Instead, when a condition-case or | |
| 99 call-with-condition-handler is set up, it installs an | |
| 100 unwind-protect on the specbind list to restore the appropriate | |
| 101 setting for the condition-handler list. During the course of | |
| 102 handling the non-local exit, all entries on the specbind list that | |
| 103 are past the location stored in the catch frame are "unwound" | |
| 104 (i.e. variable bindings are restored and unwind-protects are | |
| 105 executed), so the condition-handler list gets reset properly. | |
| 106 | |
| 107 The five lists are | |
| 108 | |
| 109 1. The backtrace list, which is chained through `struct backtrace's | |
| 110 declared in the stack frames of various primitives, and keeps | |
| 111 track of all Lisp function call entries and exits. | |
| 112 2. The catchtag list, which is chained through `struct catchtag's | |
| 113 declared in the stack frames of internal_catch and condition_case_1, | |
| 114 and keeps track of information needed to reset the internal state | |
| 115 of the evaluator to the state that was current when the catch or | |
| 116 condition-case were established, in the event of a non-local exit. | |
| 117 3. The condition-handler list, which is a simple Lisp list with new | |
| 118 entries consed onto the front of the list. It records condition-cases | |
| 119 and call-with-condition-handlers established either from C or from | |
| 120 Lisp. Unlike with the other lists (but similar to everything else | |
| 121 of a similar nature in the rest of the C and Lisp code), it takes care | |
| 122 of restoring itself appropriately in the event of a non-local exit | |
| 123 through the use of the unwind-protect mechanism. | |
| 124 4. The specbind list, which is a contiguous array of `struct specbinding's, | |
| 125 expanded as necessary using realloc(). It holds dynamic variable | |
| 126 bindings (the only kind we currently have in ELisp) and unwind-protects. | |
| 127 5. The GCPRO list, which is chained through `struct gcpro's declared in | |
| 128 the stack frames of any functions that need to GC-protect Lisp_Objects | |
| 129 declared on the stack. This is one of the most fragile areas of the | |
| 130 entire scheme -- you must not forget to UNGCPRO at the end of your | |
| 131 function, you must make sure you GCPRO in many circumstances you don't | |
| 132 think you have to, etc. See the internals manual for more information | |
| 133 about this. | |
| 134 | |
| 135 --ben | |
| 136 */ | |
| 137 | |
| 428 | 138 #include <config.h> |
| 139 #include "lisp.h" | |
| 140 | |
| 141 #include "commands.h" | |
| 142 #include "backtrace.h" | |
| 143 #include "bytecode.h" | |
| 144 #include "buffer.h" | |
| 872 | 145 #include "console-impl.h" |
| 853 | 146 #include "device.h" |
| 147 #include "frame.h" | |
| 148 #include "lstream.h" | |
| 428 | 149 #include "opaque.h" |
| 1292 | 150 #include "profile.h" |
| 853 | 151 #include "window.h" |
| 428 | 152 |
| 153 struct backtrace *backtrace_list; | |
| 154 | |
| 155 /* Macros for calling subrs with an argument list whose length is only | |
| 156 known at runtime. See EXFUN and DEFUN for similar hackery. */ | |
| 157 | |
| 158 #define AV_0(av) | |
| 159 #define AV_1(av) av[0] | |
| 160 #define AV_2(av) AV_1(av), av[1] | |
| 161 #define AV_3(av) AV_2(av), av[2] | |
| 162 #define AV_4(av) AV_3(av), av[3] | |
| 163 #define AV_5(av) AV_4(av), av[4] | |
| 164 #define AV_6(av) AV_5(av), av[5] | |
| 165 #define AV_7(av) AV_6(av), av[6] | |
| 166 #define AV_8(av) AV_7(av), av[7] | |
| 167 | |
| 168 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \ | |
| 444 | 169 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av))) |
| 428 | 170 |
| 171 /* If subrs take more than 8 arguments, more cases need to be added | |
| 172 to this switch. (But wait - don't do it - if you really need | |
| 173 a SUBR with more than 8 arguments, use max_args == MANY. | |
| 853 | 174 Or better, considering using a property list as one of your args. |
| 428 | 175 See the DEFUN macro in lisp.h) */ |
| 176 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \ | |
| 177 void (*PF_fn)(void) = (void (*)(void)) fn; \ | |
| 178 Lisp_Object *PF_av = (av); \ | |
| 179 switch (ac) \ | |
| 180 { \ | |
| 436 | 181 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \ |
| 428 | 182 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \ |
| 183 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \ | |
| 184 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \ | |
| 185 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \ | |
| 186 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \ | |
| 187 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \ | |
| 188 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \ | |
| 189 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \ | |
| 190 } \ | |
| 191 } while (0) | |
| 192 | |
| 193 #define FUNCALL_SUBR(rv, subr, av, ac) \ | |
| 194 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac); | |
| 195 | |
| 196 | |
| 197 /* This is the list of current catches (and also condition-cases). | |
| 853 | 198 This is a stack: the most recent catch is at the head of the list. |
| 199 The list is threaded through the stack frames of the C functions | |
| 200 that set up the catches; this is similar to the way the GCPRO list | |
| 201 is handled, but different from the condition-handler list (which is | |
| 202 a simple Lisp list) and the specbind stack, which is a contiguous | |
| 203 array of `struct specbinding's, grown (using realloc()) as | |
| 204 necessary. (Note that all four of these lists behave as a stacks.) | |
| 205 | |
| 3025 | 206 Catches are created by declaring a `struct catchtag' locally, |
| 853 | 207 filling the .TAG field in with the tag, and doing a setjmp() on |
| 208 .JMP. Fthrow() will store the value passed to it in .VAL and | |
| 209 longjmp() back to .JMP, back to the function that established the | |
| 210 catch. This will always be either internal_catch() (catches | |
| 211 established internally or through `catch') or condition_case_1 | |
| 212 (condition-cases established internally or through | |
| 213 `condition-case'). | |
| 428 | 214 |
| 215 The catchtag also records the current position in the | |
| 216 call stack (stored in BACKTRACE_LIST), the current position | |
| 217 in the specpdl stack (used for variable bindings and | |
| 218 unwind-protects), the value of LISP_EVAL_DEPTH, and the | |
| 219 current position in the GCPRO stack. All of these are | |
| 220 restored by Fthrow(). | |
| 853 | 221 */ |
| 428 | 222 |
| 223 struct catchtag *catchlist; | |
| 224 | |
| 853 | 225 /* A special tag that can be used internally from C code to catch |
| 226 every attempt to throw past this level. */ | |
| 227 Lisp_Object Vcatch_everything_tag; | |
| 228 | |
| 428 | 229 Lisp_Object Qautoload, Qmacro, Qexit; |
| 230 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues; | |
| 231 Lisp_Object Vquit_flag, Vinhibit_quit; | |
| 232 Lisp_Object Qand_rest, Qand_optional; | |
| 233 Lisp_Object Qdebug_on_error, Qstack_trace_on_error; | |
| 234 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal; | |
| 235 Lisp_Object Qdebugger; | |
| 236 Lisp_Object Qinhibit_quit; | |
| 887 | 237 Lisp_Object Qfinalize_list; |
| 428 | 238 Lisp_Object Qrun_hooks; |
| 239 Lisp_Object Qsetq; | |
| 240 Lisp_Object Qdisplay_warning; | |
| 241 Lisp_Object Vpending_warnings, Vpending_warnings_tail; | |
| 242 Lisp_Object Qif; | |
| 243 | |
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244 Lisp_Object Qthrow; |
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245 Lisp_Object Qobsolete_throw; |
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246 Lisp_Object Qmultiple_value_list_internal; |
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247 |
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248 static int first_desired_multiple_value; |
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249 /* Used outside this file, somewhat uncleanly, in the IGNORE_MULTIPLE_VALUES |
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250 macro: */ |
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251 int multiple_value_current_limit; |
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252 |
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253 Fixnum Vmultiple_values_limit; |
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254 |
| 853 | 255 /* Flags specifying which operations are currently inhibited. */ |
| 256 int inhibit_flags; | |
| 257 | |
| 258 /* Buffers, frames, windows, devices, and consoles created since most | |
| 259 recent active | |
| 260 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION). | |
| 261 */ | |
| 262 Lisp_Object Vdeletable_permanent_display_objects; | |
| 263 | |
| 264 /* Buffers created since most recent active | |
| 265 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */ | |
| 266 Lisp_Object Vmodifiable_buffers; | |
| 793 | 267 |
| 268 /* Minimum level at which warnings are logged. Below this, they're ignored | |
| 269 entirely -- not even generated. */ | |
| 270 Lisp_Object Vlog_warning_minimum_level; | |
| 271 | |
| 428 | 272 /* Non-nil means record all fset's and provide's, to be undone |
| 273 if the file being autoloaded is not fully loaded. | |
| 274 They are recorded by being consed onto the front of Vautoload_queue: | |
| 275 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
| 276 Lisp_Object Vautoload_queue; | |
| 277 | |
| 278 /* Current number of specbindings allocated in specpdl. */ | |
| 279 int specpdl_size; | |
| 280 | |
| 281 /* Pointer to beginning of specpdl. */ | |
| 282 struct specbinding *specpdl; | |
| 283 | |
| 284 /* Pointer to first unused element in specpdl. */ | |
| 285 struct specbinding *specpdl_ptr; | |
| 286 | |
| 287 /* specpdl_ptr - specpdl */ | |
| 288 int specpdl_depth_counter; | |
| 289 | |
| 290 /* Maximum size allowed for specpdl allocation */ | |
| 458 | 291 Fixnum max_specpdl_size; |
| 428 | 292 |
| 293 /* Depth in Lisp evaluations and function calls. */ | |
| 1292 | 294 int lisp_eval_depth; |
| 428 | 295 |
| 296 /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
| 458 | 297 Fixnum max_lisp_eval_depth; |
| 428 | 298 |
| 299 /* Nonzero means enter debugger before next function call */ | |
| 300 static int debug_on_next_call; | |
| 301 | |
| 1292 | 302 int backtrace_with_internal_sections; |
| 303 | |
| 428 | 304 /* List of conditions (non-nil atom means all) which cause a backtrace |
| 305 if an error is handled by the command loop's error handler. */ | |
| 306 Lisp_Object Vstack_trace_on_error; | |
| 307 | |
| 308 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 309 if an error is handled by the command loop's error handler. */ | |
| 310 Lisp_Object Vdebug_on_error; | |
| 311 | |
| 312 /* List of conditions and regexps specifying error messages which | |
| 313 do not enter the debugger even if Vdebug_on_error says they should. */ | |
| 314 Lisp_Object Vdebug_ignored_errors; | |
| 315 | |
| 316 /* List of conditions (non-nil atom means all) which cause a backtrace | |
| 317 if any error is signalled. */ | |
| 318 Lisp_Object Vstack_trace_on_signal; | |
| 319 | |
| 320 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 321 if any error is signalled. */ | |
| 322 Lisp_Object Vdebug_on_signal; | |
| 323 | |
| 324 /* Nonzero means enter debugger if a quit signal | |
| 325 is handled by the command loop's error handler. | |
| 326 | |
| 327 From lisp, this is a boolean variable and may have the values 0 and 1. | |
| 328 But, eval.c temporarily uses the second bit of this variable to indicate | |
| 329 that a critical_quit is in progress. The second bit is reset immediately | |
| 330 after it is processed in signal_call_debugger(). */ | |
| 331 int debug_on_quit; | |
| 332 | |
| 333 #if 0 /* FSFmacs */ | |
| 334 /* entering_debugger is basically equivalent */ | |
| 335 /* The value of num_nonmacro_input_chars as of the last time we | |
| 336 started to enter the debugger. If we decide to enter the debugger | |
| 337 again when this is still equal to num_nonmacro_input_chars, then we | |
| 338 know that the debugger itself has an error, and we should just | |
| 339 signal the error instead of entering an infinite loop of debugger | |
| 340 invocations. */ | |
| 341 int when_entered_debugger; | |
| 342 #endif | |
| 343 | |
| 344 /* Nonzero means we are trying to enter the debugger. | |
| 345 This is to prevent recursive attempts. | |
| 346 Cleared by the debugger calling Fbacktrace */ | |
| 347 static int entering_debugger; | |
| 348 | |
| 349 /* Function to call to invoke the debugger */ | |
| 350 Lisp_Object Vdebugger; | |
| 351 | |
| 853 | 352 /* List of condition handlers currently in effect. |
| 353 The elements of this lists were at one point in the past | |
| 354 threaded through the stack frames of Fcondition_case and | |
| 355 related functions, but now are stored separately in a normal | |
| 356 stack. When an error is signaled (by calling Fsignal, below), | |
| 357 this list is searched for an element that applies. | |
| 428 | 358 |
| 359 Each element of this list is one of the following: | |
| 360 | |
| 853 | 361 -- A list of a handler function and possibly args to pass to the |
| 362 function. This is a handler established with the Lisp primitive | |
| 363 `call-with-condition-handler' or related C function | |
| 364 call_with_condition_handler(): | |
| 365 | |
| 366 If the handler function is an opaque ptr object, it is a handler | |
| 367 that was established in C using call_with_condition_handler(), | |
| 368 and the contents of the object are a function pointer which takes | |
| 369 three arguments, the signal name and signal data (same arguments | |
| 370 passed to `signal') and a third Lisp_Object argument, specified | |
| 371 in the call to call_with_condition_handler() and stored as the | |
| 372 second element of the list containing the handler functionl. | |
| 373 | |
| 374 If the handler function is a regular Lisp_Object, it is a handler | |
| 375 that was established using `call-with-condition-handler'. | |
| 376 Currently there are no more arguments in the list containing the | |
| 377 handler function, and only one argument is passed to the handler | |
| 378 function: a cons of the signal name and signal data arguments | |
| 379 passed to `signal'. | |
| 380 | |
| 381 -- A list whose car is Qunbound and whose cdr is Qt. This is a | |
| 382 special condition-case handler established by C code with | |
| 383 condition_case_1(). All errors are trapped; the debugger is not | |
| 384 invoked even if `debug-on-error' was set. | |
| 385 | |
| 386 -- A list whose car is Qunbound and whose cdr is Qerror. This is a | |
| 387 special condition-case handler established by C code with | |
| 388 condition_case_1(). It is like Qt except that the debugger is | |
| 389 invoked normally if it is called for. | |
| 390 | |
| 391 -- A list whose car is Qunbound and whose cdr is a list of lists | |
| 392 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is | |
| 393 a normal `condition-case' handler. | |
| 394 | |
| 395 Note that in all cases *except* the first, there is a corresponding | |
| 396 catch, whose TAG is the value of Vcondition_handlers just after the | |
| 397 handler data just described is pushed onto it. The reason is that | |
| 398 `condition-case' handlers need to throw back to the place where the | |
| 399 handler was installed before invoking it, while | |
| 400 `call-with-condition-handler' handlers are invoked in the | |
| 401 environment that `signal' was invoked in. */ | |
| 402 | |
| 403 | |
| 428 | 404 static Lisp_Object Vcondition_handlers; |
| 405 | |
| 853 | 406 /* I think we should keep this enabled all the time, not just when |
| 407 error checking is enabled, because if one of these puppies pops up, | |
| 408 it will trash the stack if not caught, making it that much harder to | |
| 409 debug. It doesn't cause speed loss. */ | |
| 442 | 410 #define DEFEND_AGAINST_THROW_RECURSION |
| 411 | |
| 412 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 413 /* Used for error catching purposes by throw_or_bomb_out */ |
| 414 static int throw_level; | |
| 442 | 415 #endif |
| 416 | |
| 1123 | 417 static int warning_will_be_discarded (Lisp_Object level); |
| 2532 | 418 static Lisp_Object maybe_get_trapping_problems_backtrace (void); |
| 1123 | 419 |
| 428 | 420 |
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422 /* When parsing keyword arguments; is some element of NARGS |
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423 :allow-other-keys, and is that element followed by a non-nil Lisp |
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424 object? */ |
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425 |
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426 Boolint |
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427 non_nil_allow_other_keys_p (Elemcount offset, int nargs, Lisp_Object *args) |
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428 { |
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429 Lisp_Object key, value; |
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430 while (offset + 1 < nargs) |
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431 { |
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432 key = args[offset++]; |
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433 value = args[offset++]; |
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434 if (EQ (key, Q_allow_other_keys)) |
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435 { |
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436 /* The ANSI Common Lisp standard says the first value for a given |
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437 keyword overrides. */ |
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438 return !NILP (value); |
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439 } |
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440 } |
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441 return 0; |
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442 } |
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443 |
| 428 | 444 /************************************************************************/ |
| 445 /* The subr object type */ | |
| 446 /************************************************************************/ | |
| 447 | |
| 448 static void | |
| 2286 | 449 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag)) |
| 428 | 450 { |
| 451 Lisp_Subr *subr = XSUBR (obj); | |
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452 const Ascbyte *header = |
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453 (subr->max_args == UNEVALLED) ? "#<special-operator " : "#<subr "; |
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454 const Ascbyte *name = subr_name (subr); |
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455 const Ascbyte *trailer = subr->prompt ? " (interactive)>" : ">"; |
| 428 | 456 |
| 457 if (print_readably) | |
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458 printing_unreadable_object_fmt ("%s%s%s", header, name, trailer); |
| 428 | 459 |
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460 write_ascstring (printcharfun, header); |
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461 write_ascstring (printcharfun, name); |
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462 write_ascstring (printcharfun, trailer); |
| 428 | 463 } |
| 464 | |
| 1204 | 465 static const struct memory_description subr_description[] = { |
| 2551 | 466 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 428 | 467 { XD_END } |
| 468 }; | |
| 469 | |
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470 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("subr", subr, |
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471 0, print_subr, 0, 0, 0, |
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472 subr_description, |
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473 Lisp_Subr); |
| 428 | 474 |
| 475 /************************************************************************/ | |
| 476 /* Entering the debugger */ | |
| 477 /************************************************************************/ | |
| 478 | |
| 853 | 479 static Lisp_Object |
| 480 current_warning_level (void) | |
| 481 { | |
| 482 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL) | |
| 483 return Qdebug; | |
| 484 else | |
| 485 return Qwarning; | |
| 486 } | |
| 487 | |
| 428 | 488 /* Actually call the debugger. ARG is a list of args that will be |
| 489 passed to the debugger function, as follows; | |
| 490 | |
| 491 If due to frame exit, args are `exit' and the value being returned; | |
| 492 this function's value will be returned instead of that. | |
| 493 If due to error, args are `error' and a list of the args to `signal'. | |
| 494 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 495 If due to `eval' entry, one arg, t. | |
| 496 | |
| 497 */ | |
| 498 | |
| 499 static Lisp_Object | |
| 500 call_debugger_259 (Lisp_Object arg) | |
| 501 { | |
| 502 return apply1 (Vdebugger, arg); | |
| 503 } | |
| 504 | |
| 505 /* Call the debugger, doing some encapsulation. We make sure we have | |
| 506 some room on the eval and specpdl stacks, and bind entering_debugger | |
| 507 to 1 during this call. This is used to trap errors that may occur | |
| 508 when entering the debugger (e.g. the value of `debugger' is invalid), | |
| 509 so that the debugger will not be recursively entered if debug-on-error | |
| 510 is set. (Otherwise, XEmacs would infinitely recurse, attempting to | |
| 511 enter the debugger.) entering_debugger gets reset to 0 as soon | |
| 512 as a backtrace is displayed, so that further errors can indeed be | |
| 513 handled normally. | |
| 514 | |
| 3025 | 515 We also establish a catch for `debugger'. If the debugger function |
| 428 | 516 throws to this instead of returning a value, it means that the user |
| 517 pressed 'c' (pretend like the debugger was never entered). The | |
| 518 function then returns Qunbound. (If the user pressed 'r', for | |
| 519 return a value, then the debugger function returns normally with | |
| 520 this value.) | |
| 521 | |
| 522 The difference between 'c' and 'r' is as follows: | |
| 523 | |
| 524 debug-on-call: | |
| 525 No difference. The call proceeds as normal. | |
| 526 debug-on-exit: | |
| 527 With 'r', the specified value is returned as the function's | |
| 528 return value. With 'c', the value that would normally be | |
| 529 returned is returned. | |
| 530 signal: | |
| 531 With 'r', the specified value is returned as the return | |
| 532 value of `signal'. (This is the only time that `signal' | |
| 533 can return, instead of making a non-local exit.) With `c', | |
| 534 `signal' will continue looking for handlers as if the | |
| 535 debugger was never entered, and will probably end up | |
| 536 throwing to a handler or to top-level. | |
| 537 */ | |
| 538 | |
| 539 static Lisp_Object | |
| 540 call_debugger (Lisp_Object arg) | |
| 541 { | |
| 542 int threw; | |
| 543 Lisp_Object val; | |
| 544 int speccount; | |
| 545 | |
| 853 | 546 debug_on_next_call = 0; |
| 547 | |
| 548 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER) | |
| 549 { | |
| 550 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE)) | |
| 551 warn_when_safe | |
| 552 (Qdebugger, current_warning_level (), | |
| 553 "Unable to enter debugger within critical section"); | |
| 554 return Qunbound; | |
| 555 } | |
| 556 | |
| 428 | 557 if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
| 558 max_lisp_eval_depth = lisp_eval_depth + 20; | |
| 559 if (specpdl_size + 40 > max_specpdl_size) | |
| 560 max_specpdl_size = specpdl_size + 40; | |
| 853 | 561 |
| 562 speccount = internal_bind_int (&entering_debugger, 1); | |
| 2532 | 563 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0, 0); |
| 428 | 564 |
| 771 | 565 return unbind_to_1 (speccount, ((threw) |
| 428 | 566 ? Qunbound /* Not returning a value */ |
| 567 : val)); | |
| 568 } | |
| 569 | |
| 570 /* Called when debug-on-exit behavior is called for. Enter the debugger | |
| 571 with the appropriate args for this. VAL is the exit value that is | |
| 572 about to be returned. */ | |
| 573 | |
| 574 static Lisp_Object | |
| 575 do_debug_on_exit (Lisp_Object val) | |
| 576 { | |
| 577 /* This is falsified by call_debugger */ | |
| 578 Lisp_Object v = call_debugger (list2 (Qexit, val)); | |
| 579 | |
| 580 return !UNBOUNDP (v) ? v : val; | |
| 581 } | |
| 582 | |
| 583 /* Called when debug-on-call behavior is called for. Enter the debugger | |
| 584 with the appropriate args for this. VAL is either t for a call | |
| 3025 | 585 through `eval' or `lambda' for a call through `funcall'. |
| 428 | 586 |
| 587 #### The differentiation here between EVAL and FUNCALL is bogus. | |
| 588 FUNCALL can be defined as | |
| 589 | |
| 590 (defmacro func (fun &rest args) | |
| 591 (cons (eval fun) args)) | |
| 592 | |
| 593 and should be treated as such. | |
| 594 */ | |
| 595 | |
| 596 static void | |
| 597 do_debug_on_call (Lisp_Object code) | |
| 598 { | |
| 599 debug_on_next_call = 0; | |
| 600 backtrace_list->debug_on_exit = 1; | |
| 601 call_debugger (list1 (code)); | |
| 602 } | |
| 603 | |
| 604 /* LIST is the value of one of the variables `debug-on-error', | |
| 605 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal', | |
| 606 and CONDITIONS is the list of error conditions associated with | |
| 607 the error being signalled. This returns non-nil if LIST | |
| 608 matches CONDITIONS. (A nil value for LIST does not match | |
| 609 CONDITIONS. A non-list value for LIST does match CONDITIONS. | |
| 610 A list matches CONDITIONS when one of the symbols in LIST is the | |
| 611 same as one of the symbols in CONDITIONS.) */ | |
| 612 | |
| 613 static int | |
| 614 wants_debugger (Lisp_Object list, Lisp_Object conditions) | |
| 615 { | |
| 616 if (NILP (list)) | |
| 617 return 0; | |
| 618 if (! CONSP (list)) | |
| 619 return 1; | |
| 620 | |
| 621 while (CONSP (conditions)) | |
| 622 { | |
| 2552 | 623 Lisp_Object curr, tail; |
| 624 curr = XCAR (conditions); | |
| 428 | 625 for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 2552 | 626 if (EQ (XCAR (tail), curr)) |
| 428 | 627 return 1; |
| 628 conditions = XCDR (conditions); | |
| 629 } | |
| 630 return 0; | |
| 631 } | |
| 632 | |
| 633 | |
| 634 /* Return 1 if an error with condition-symbols CONDITIONS, | |
| 635 and described by SIGNAL-DATA, should skip the debugger | |
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636 according to debug-ignored-errors. */ |
| 428 | 637 |
| 638 static int | |
| 639 skip_debugger (Lisp_Object conditions, Lisp_Object data) | |
| 640 { | |
| 641 /* This function can GC */ | |
| 642 Lisp_Object tail; | |
| 643 int first_string = 1; | |
| 644 Lisp_Object error_message = Qnil; | |
| 645 | |
| 646 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
| 647 { | |
| 648 if (STRINGP (XCAR (tail))) | |
| 649 { | |
| 650 if (first_string) | |
| 651 { | |
| 652 error_message = Ferror_message_string (data); | |
| 653 first_string = 0; | |
| 654 } | |
| 655 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0) | |
| 656 return 1; | |
| 657 } | |
| 658 else | |
| 659 { | |
| 660 Lisp_Object contail; | |
| 661 | |
| 662 for (contail = conditions; CONSP (contail); contail = XCDR (contail)) | |
| 663 if (EQ (XCAR (tail), XCAR (contail))) | |
| 664 return 1; | |
| 665 } | |
| 666 } | |
| 667 | |
| 668 return 0; | |
| 669 } | |
| 670 | |
| 671 /* Actually generate a backtrace on STREAM. */ | |
| 672 | |
| 673 static Lisp_Object | |
| 674 backtrace_259 (Lisp_Object stream) | |
| 675 { | |
| 676 return Fbacktrace (stream, Qt); | |
| 677 } | |
| 678 | |
| 1130 | 679 #ifdef DEBUG_XEMACS |
| 680 | |
| 681 static void | |
| 682 trace_out_and_die (Lisp_Object err) | |
| 683 { | |
| 684 Fdisplay_error (err, Qt); | |
| 685 backtrace_259 (Qnil); | |
| 686 stderr_out ("XEmacs exiting to debugger.\n"); | |
| 687 Fforce_debugging_signal (Qt); | |
| 688 /* Unlikely to be reached */ | |
| 689 } | |
| 690 | |
| 691 #endif | |
| 692 | |
| 428 | 693 /* An error was signaled. Maybe call the debugger, if the `debug-on-error' |
| 694 etc. variables call for this. CONDITIONS is the list of conditions | |
| 695 associated with the error being signalled. SIG is the actual error | |
| 696 being signalled, and DATA is the associated data (these are exactly | |
| 697 the same as the arguments to `signal'). ACTIVE_HANDLERS is the | |
| 698 list of error handlers that are to be put in place while the debugger | |
| 699 is called. This is generally the remaining handlers that are | |
| 700 outside of the innermost handler trapping this error. This way, | |
| 701 if the same error occurs inside of the debugger, you usually don't get | |
| 702 the debugger entered recursively. | |
| 703 | |
| 704 This function returns Qunbound if it didn't call the debugger or if | |
| 705 the user asked (through 'c') that XEmacs should pretend like the | |
| 706 debugger was never entered. Otherwise, it returns the value | |
| 707 that the user specified with `r'. (Note that much of the time, | |
| 708 the user will abort with C-], and we will never have a chance to | |
| 709 return anything at all.) | |
| 710 | |
| 711 SIGNAL_VARS_ONLY means we should only look at debug-on-signal | |
| 712 and stack-trace-on-signal to control whether we do anything. | |
| 713 This is so that debug-on-error doesn't make handled errors | |
| 714 cause the debugger to get invoked. | |
| 715 | |
| 716 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that | |
| 717 those functions aren't done more than once in a single `signal' | |
| 718 session. */ | |
| 719 | |
| 720 static Lisp_Object | |
| 721 signal_call_debugger (Lisp_Object conditions, | |
| 722 Lisp_Object sig, Lisp_Object data, | |
| 723 Lisp_Object active_handlers, | |
| 724 int signal_vars_only, | |
| 725 int *stack_trace_displayed, | |
| 726 int *debugger_entered) | |
| 727 { | |
| 853 | 728 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 729 /* This function can GC */ |
| 853 | 730 #else /* reality check */ |
| 731 /* This function cannot GC because it inhibits GC during its operation */ | |
| 732 #endif | |
| 733 | |
| 428 | 734 Lisp_Object val = Qunbound; |
| 735 Lisp_Object all_handlers = Vcondition_handlers; | |
| 736 Lisp_Object temp_data = Qnil; | |
| 853 | 737 int outer_speccount = specpdl_depth(); |
| 738 int speccount; | |
| 739 | |
| 740 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE | |
| 428 | 741 struct gcpro gcpro1, gcpro2; |
| 742 GCPRO2 (all_handlers, temp_data); | |
| 853 | 743 #else |
| 744 begin_gc_forbidden (); | |
| 745 #endif | |
| 746 | |
| 747 speccount = specpdl_depth(); | |
| 428 | 748 |
| 749 Vcondition_handlers = active_handlers; | |
| 750 | |
| 751 temp_data = Fcons (sig, data); /* needed for skip_debugger */ | |
| 752 | |
| 753 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only | |
| 754 && wants_debugger (Vstack_trace_on_error, conditions) | |
| 755 && !skip_debugger (conditions, temp_data)) | |
| 756 { | |
| 757 specbind (Qdebug_on_error, Qnil); | |
| 758 specbind (Qstack_trace_on_error, Qnil); | |
| 759 specbind (Qdebug_on_signal, Qnil); | |
| 760 specbind (Qstack_trace_on_signal, Qnil); | |
| 761 | |
| 442 | 762 if (!noninteractive) |
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763 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 764 backtrace_259, |
| 765 Qnil, | |
| 766 Qnil); | |
| 767 else /* in batch mode, we want this going to stderr. */ | |
| 768 backtrace_259 (Qnil); | |
| 771 | 769 unbind_to (speccount); |
| 428 | 770 *stack_trace_displayed = 1; |
| 771 } | |
| 772 | |
| 773 if (!entering_debugger && !*debugger_entered && !signal_vars_only | |
| 774 && (EQ (sig, Qquit) | |
| 775 ? debug_on_quit | |
| 776 : wants_debugger (Vdebug_on_error, conditions)) | |
| 777 && !skip_debugger (conditions, temp_data)) | |
| 778 { | |
| 779 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 780 |
| 428 | 781 specbind (Qdebug_on_error, Qnil); |
| 782 specbind (Qstack_trace_on_error, Qnil); | |
| 783 specbind (Qdebug_on_signal, Qnil); | |
| 784 specbind (Qstack_trace_on_signal, Qnil); | |
| 785 | |
| 1130 | 786 #ifdef DEBUG_XEMACS |
| 787 if (noninteractive) | |
| 788 trace_out_and_die (Fcons (sig, data)); | |
| 789 #endif | |
| 790 | |
| 428 | 791 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 853 | 792 unbind_to (speccount); |
| 428 | 793 *debugger_entered = 1; |
| 794 } | |
| 795 | |
| 796 if (!entering_debugger && !*stack_trace_displayed | |
| 797 && wants_debugger (Vstack_trace_on_signal, conditions)) | |
| 798 { | |
| 799 specbind (Qdebug_on_error, Qnil); | |
| 800 specbind (Qstack_trace_on_error, Qnil); | |
| 801 specbind (Qdebug_on_signal, Qnil); | |
| 802 specbind (Qstack_trace_on_signal, Qnil); | |
| 803 | |
| 442 | 804 if (!noninteractive) |
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805 internal_with_output_to_temp_buffer (build_ascstring ("*Backtrace*"), |
| 442 | 806 backtrace_259, |
| 807 Qnil, | |
| 808 Qnil); | |
| 809 else /* in batch mode, we want this going to stderr. */ | |
| 810 backtrace_259 (Qnil); | |
| 771 | 811 unbind_to (speccount); |
| 428 | 812 *stack_trace_displayed = 1; |
| 813 } | |
| 814 | |
| 815 if (!entering_debugger && !*debugger_entered | |
| 816 && (EQ (sig, Qquit) | |
| 817 ? debug_on_quit | |
| 818 : wants_debugger (Vdebug_on_signal, conditions))) | |
| 819 { | |
| 820 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 821 |
| 428 | 822 specbind (Qdebug_on_error, Qnil); |
| 823 specbind (Qstack_trace_on_error, Qnil); | |
| 824 specbind (Qdebug_on_signal, Qnil); | |
| 825 specbind (Qstack_trace_on_signal, Qnil); | |
| 826 | |
| 1130 | 827 #ifdef DEBUG_XEMACS |
| 828 if (noninteractive) | |
| 829 trace_out_and_die (Fcons (sig, data)); | |
| 830 #endif | |
| 831 | |
| 428 | 832 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 833 *debugger_entered = 1; | |
| 834 } | |
| 835 | |
| 853 | 836 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 837 UNGCPRO; |
| 853 | 838 #endif |
| 428 | 839 Vcondition_handlers = all_handlers; |
| 853 | 840 return unbind_to_1 (outer_speccount, val); |
| 428 | 841 } |
| 842 | |
| 843 | |
| 844 /************************************************************************/ | |
| 845 /* The basic special forms */ | |
| 846 /************************************************************************/ | |
| 847 | |
|
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848 /* Except for Fprogn(), the basic special operators below are only called |
| 428 | 849 from interpreted code. The byte compiler turns them into bytecodes. */ |
| 850 | |
| 851 DEFUN ("or", For, 0, UNEVALLED, 0, /* | |
|
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852 Eval ARGS until one of them yields non-nil, then return that value. |
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853 The remaining ARGS are not evalled at all. |
| 428 | 854 If all args return nil, return nil. |
|
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855 |
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856 Any multiple values from the last form, and only from the last form, are |
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857 passed back. See `values' and `multiple-value-bind'. |
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858 |
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859 arguments: (&rest ARGS) |
| 428 | 860 */ |
| 861 (args)) | |
| 862 { | |
| 863 /* This function can GC */ | |
|
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864 Lisp_Object val = Qnil; |
| 428 | 865 |
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866 LIST_LOOP_3 (arg, args, tail) |
| 428 | 867 { |
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868 if (!NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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869 { |
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870 if (NILP (XCDR (tail))) |
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871 { |
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872 /* Pass back multiple values if this is the last one: */ |
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873 return val; |
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874 } |
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875 |
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876 return IGNORE_MULTIPLE_VALUES (val); |
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877 } |
| 428 | 878 } |
| 879 | |
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880 return val; |
| 428 | 881 } |
| 882 | |
| 883 DEFUN ("and", Fand, 0, UNEVALLED, 0, /* | |
|
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884 Eval ARGS until one of them yields nil, then return nil. |
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885 The remaining ARGS are not evalled at all. |
| 428 | 886 If no arg yields nil, return the last arg's value. |
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887 |
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888 Any multiple values from the last form, and only from the last form, are |
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889 passed back. See `values' and `multiple-value-bind'. |
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890 |
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891 arguments: (&rest ARGS) |
| 428 | 892 */ |
| 893 (args)) | |
| 894 { | |
| 895 /* This function can GC */ | |
|
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896 Lisp_Object val = Qt; |
| 428 | 897 |
|
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898 LIST_LOOP_3 (arg, args, tail) |
| 428 | 899 { |
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900 if (NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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901 { |
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902 if (NILP (XCDR (tail))) |
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903 { |
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904 /* Pass back any multiple values for the last form: */ |
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905 return val; |
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906 } |
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907 |
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908 return Qnil; |
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909 } |
| 428 | 910 } |
| 911 | |
| 912 return val; | |
| 913 } | |
| 914 | |
| 915 DEFUN ("if", Fif, 2, UNEVALLED, 0, /* | |
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916 If COND yields non-nil, do THEN, else do ELSE. |
| 428 | 917 Returns the value of THEN or the value of the last of the ELSE's. |
| 918 THEN must be one expression, but ELSE... can be zero or more expressions. | |
| 919 If COND yields nil, and there are no ELSE's, the value is nil. | |
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920 |
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921 arguments: (COND THEN &rest ELSE) |
| 428 | 922 */ |
| 923 (args)) | |
| 924 { | |
| 925 /* This function can GC */ | |
| 926 Lisp_Object condition = XCAR (args); | |
| 927 Lisp_Object then_form = XCAR (XCDR (args)); | |
| 928 Lisp_Object else_forms = XCDR (XCDR (args)); | |
| 929 | |
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930 if (!NILP (IGNORE_MULTIPLE_VALUES (Feval (condition)))) |
| 428 | 931 return Feval (then_form); |
| 932 else | |
| 933 return Fprogn (else_forms); | |
| 934 } | |
| 935 | |
| 936 /* Macros `when' and `unless' are trivially defined in Lisp, | |
| 937 but it helps for bootstrapping to have them ALWAYS defined. */ | |
| 938 | |
| 939 DEFUN ("when", Fwhen, 1, MANY, 0, /* | |
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940 If COND yields non-nil, do BODY, else return nil. |
| 428 | 941 BODY can be zero or more expressions. If BODY is nil, return nil. |
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942 |
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943 arguments: (COND &rest BODY) |
| 428 | 944 */ |
| 945 (int nargs, Lisp_Object *args)) | |
| 946 { | |
| 947 Lisp_Object cond = args[0]; | |
| 948 Lisp_Object body; | |
| 853 | 949 |
| 428 | 950 switch (nargs) |
| 951 { | |
| 952 case 1: body = Qnil; break; | |
| 953 case 2: body = args[1]; break; | |
| 954 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break; | |
| 955 } | |
| 956 | |
| 957 return list3 (Qif, cond, body); | |
| 958 } | |
| 959 | |
| 960 DEFUN ("unless", Funless, 1, MANY, 0, /* | |
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961 If COND yields nil, do BODY, else return nil. |
| 428 | 962 BODY can be zero or more expressions. If BODY is nil, return nil. |
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963 |
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964 arguments: (COND &rest BODY) |
| 428 | 965 */ |
| 966 (int nargs, Lisp_Object *args)) | |
| 967 { | |
| 968 Lisp_Object cond = args[0]; | |
| 969 Lisp_Object body = Flist (nargs-1, args+1); | |
| 970 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body))); | |
| 971 } | |
| 972 | |
| 973 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /* | |
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974 Try each clause until one succeeds. |
| 428 | 975 Each clause looks like (CONDITION BODY...). CONDITION is evaluated |
| 976 and, if the value is non-nil, this clause succeeds: | |
| 977 then the expressions in BODY are evaluated and the last one's | |
| 978 value is the value of the cond-form. | |
| 979 If no clause succeeds, cond returns nil. | |
| 980 If a clause has one element, as in (CONDITION), | |
| 981 CONDITION's value if non-nil is returned from the cond-form. | |
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982 |
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983 arguments: (&rest CLAUSES) |
| 428 | 984 */ |
| 985 (args)) | |
| 986 { | |
| 987 /* This function can GC */ | |
| 442 | 988 REGISTER Lisp_Object val; |
| 428 | 989 |
| 990 LIST_LOOP_2 (clause, args) | |
| 991 { | |
| 992 CHECK_CONS (clause); | |
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993 if (!NILP (val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (clause))))) |
| 428 | 994 { |
| 995 if (!NILP (clause = XCDR (clause))) | |
| 996 { | |
| 997 CHECK_TRUE_LIST (clause); | |
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998 /* Pass back any multiple values here: */ |
| 428 | 999 val = Fprogn (clause); |
| 1000 } | |
| 1001 return val; | |
| 1002 } | |
| 1003 } | |
| 1004 | |
| 1005 return Qnil; | |
| 1006 } | |
| 1007 | |
| 1008 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /* | |
|
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1009 Eval BODY forms sequentially and return value of last one. |
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1010 |
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1011 arguments: (&rest BODY) |
| 428 | 1012 */ |
| 1013 (args)) | |
| 1014 { | |
| 1015 /* This function can GC */ | |
| 1016 /* Caller must provide a true list in ARGS */ | |
| 442 | 1017 REGISTER Lisp_Object val = Qnil; |
| 428 | 1018 struct gcpro gcpro1; |
| 1019 | |
| 1020 GCPRO1 (args); | |
| 1021 | |
| 1022 { | |
| 1023 LIST_LOOP_2 (form, args) | |
| 1024 val = Feval (form); | |
| 1025 } | |
| 1026 | |
| 1027 UNGCPRO; | |
| 1028 return val; | |
| 1029 } | |
| 1030 | |
| 1031 /* Fprog1() is the canonical example of a function that must GCPRO a | |
| 1032 Lisp_Object across calls to Feval(). */ | |
| 1033 | |
| 1034 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /* | |
| 1035 Similar to `progn', but the value of the first form is returned. | |
|
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|
1036 |
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1037 All the arguments are evaluated sequentially. The value of FIRST is saved |
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1038 during evaluation of the remaining args, whose values are discarded. |
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1039 |
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1040 arguments: (FIRST &rest BODY) |
| 428 | 1041 */ |
| 1042 (args)) | |
| 1043 { | |
| 1849 | 1044 Lisp_Object val; |
| 428 | 1045 struct gcpro gcpro1; |
| 1046 | |
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1047 val = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
| 428 | 1048 |
| 1049 GCPRO1 (val); | |
| 1050 | |
| 1051 { | |
| 1052 LIST_LOOP_2 (form, XCDR (args)) | |
| 1053 Feval (form); | |
| 1054 } | |
| 1055 | |
| 1056 UNGCPRO; | |
| 1057 return val; | |
| 1058 } | |
| 1059 | |
| 1060 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /* | |
| 1061 Similar to `progn', but the value of the second form is returned. | |
|
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|
1062 |
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1063 All the arguments are evaluated sequentially. The value of SECOND is saved |
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1064 during evaluation of the remaining args, whose values are discarded. |
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|
1065 |
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|
1066 arguments: (FIRST SECOND &rest BODY) |
| 428 | 1067 */ |
| 1068 (args)) | |
| 1069 { | |
| 1070 /* This function can GC */ | |
| 1849 | 1071 Lisp_Object val; |
| 428 | 1072 struct gcpro gcpro1; |
| 1073 | |
| 1074 Feval (XCAR (args)); | |
| 1075 args = XCDR (args); | |
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1076 |
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|
1077 val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
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1078 |
| 428 | 1079 args = XCDR (args); |
| 1080 | |
| 1081 GCPRO1 (val); | |
| 1082 | |
| 442 | 1083 { |
| 1084 LIST_LOOP_2 (form, args) | |
| 1085 Feval (form); | |
| 1086 } | |
| 428 | 1087 |
| 1088 UNGCPRO; | |
| 1089 return val; | |
| 1090 } | |
| 1091 | |
| 1092 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /* | |
|
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|
1093 Bind variables according to VARLIST then eval BODY. |
| 428 | 1094 The value of the last form in BODY is returned. |
| 1095 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1096 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1097 Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
|
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|
1098 |
|
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|
1099 arguments: (VARLIST &rest BODY) |
| 428 | 1100 */ |
| 1101 (args)) | |
| 1102 { | |
| 1103 /* This function can GC */ | |
| 1104 Lisp_Object varlist = XCAR (args); | |
| 1105 Lisp_Object body = XCDR (args); | |
| 1106 int speccount = specpdl_depth(); | |
| 1107 | |
| 1108 EXTERNAL_LIST_LOOP_3 (var, varlist, tail) | |
| 1109 { | |
| 1110 Lisp_Object symbol, value, tem; | |
| 1111 if (SYMBOLP (var)) | |
| 1112 symbol = var, value = Qnil; | |
| 1113 else | |
| 1114 { | |
| 1115 CHECK_CONS (var); | |
| 1116 symbol = XCAR (var); | |
| 1117 tem = XCDR (var); | |
| 1118 if (NILP (tem)) | |
| 1119 value = Qnil; | |
| 1120 else | |
| 1121 { | |
| 1122 CHECK_CONS (tem); | |
|
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|
1123 value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 428 | 1124 if (!NILP (XCDR (tem))) |
| 563 | 1125 sferror |
| 428 | 1126 ("`let' bindings can have only one value-form", var); |
| 1127 } | |
| 1128 } | |
| 1129 specbind (symbol, value); | |
| 1130 } | |
| 771 | 1131 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1132 } |
| 1133 | |
| 1134 DEFUN ("let", Flet, 1, UNEVALLED, 0, /* | |
|
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|
1135 Bind variables according to VARLIST then eval BODY. |
| 428 | 1136 The value of the last form in BODY is returned. |
| 1137 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1138 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1139 All the VALUEFORMs are evalled before any symbols are bound. | |
|
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|
1140 |
|
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|
1141 arguments: (VARLIST &rest BODY) |
| 428 | 1142 */ |
| 1143 (args)) | |
| 1144 { | |
| 1145 /* This function can GC */ | |
| 1146 Lisp_Object varlist = XCAR (args); | |
| 1147 Lisp_Object body = XCDR (args); | |
| 1148 int speccount = specpdl_depth(); | |
| 1149 Lisp_Object *temps; | |
| 1150 int idx; | |
| 1151 struct gcpro gcpro1; | |
| 1152 | |
| 1153 /* Make space to hold the values to give the bound variables. */ | |
| 1154 { | |
| 1155 int varcount; | |
| 1156 GET_EXTERNAL_LIST_LENGTH (varlist, varcount); | |
| 1157 temps = alloca_array (Lisp_Object, varcount); | |
| 1158 } | |
| 1159 | |
| 1160 /* Compute the values and store them in `temps' */ | |
| 1161 GCPRO1 (*temps); | |
| 1162 gcpro1.nvars = 0; | |
| 1163 | |
| 1164 idx = 0; | |
| 442 | 1165 { |
| 1166 LIST_LOOP_2 (var, varlist) | |
| 1167 { | |
| 1168 Lisp_Object *value = &temps[idx++]; | |
| 1169 if (SYMBOLP (var)) | |
| 1170 *value = Qnil; | |
| 1171 else | |
| 1172 { | |
| 1173 Lisp_Object tem; | |
| 1174 CHECK_CONS (var); | |
| 1175 tem = XCDR (var); | |
| 1176 if (NILP (tem)) | |
| 1177 *value = Qnil; | |
| 1178 else | |
| 1179 { | |
| 1180 CHECK_CONS (tem); | |
|
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|
1181 *value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 442 | 1182 gcpro1.nvars = idx; |
| 1183 | |
| 1184 if (!NILP (XCDR (tem))) | |
| 563 | 1185 sferror |
| 442 | 1186 ("`let' bindings can have only one value-form", var); |
| 1187 } | |
| 1188 } | |
| 1189 } | |
| 1190 } | |
| 428 | 1191 |
| 1192 idx = 0; | |
| 442 | 1193 { |
| 1194 LIST_LOOP_2 (var, varlist) | |
| 1195 { | |
| 1196 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]); | |
| 1197 } | |
| 1198 } | |
| 428 | 1199 |
| 1200 UNGCPRO; | |
| 1201 | |
| 771 | 1202 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1203 } |
| 1204 | |
| 1205 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /* | |
|
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|
1206 If TEST yields non-nil, eval BODY... and repeat. |
| 428 | 1207 The order of execution is thus TEST, BODY, TEST, BODY and so on |
| 1208 until TEST returns nil. | |
|
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|
1209 |
|
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|
1210 arguments: (TEST &rest BODY) |
| 428 | 1211 */ |
| 1212 (args)) | |
| 1213 { | |
| 1214 /* This function can GC */ | |
| 1215 Lisp_Object test = XCAR (args); | |
| 1216 Lisp_Object body = XCDR (args); | |
| 1217 | |
|
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|
1218 while (!NILP (IGNORE_MULTIPLE_VALUES (Feval (test)))) |
| 428 | 1219 { |
| 1220 QUIT; | |
| 1221 Fprogn (body); | |
| 1222 } | |
| 1223 | |
| 1224 return Qnil; | |
| 1225 } | |
| 1226 | |
| 1227 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /* | |
| 1228 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL. | |
| 1229 The symbols SYM are variables; they are literal (not evaluated). | |
| 1230 The values VAL are expressions; they are evaluated. | |
| 1231 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
| 1232 The second VAL is not computed until after the first SYM is set, and so on; | |
| 1233 each VAL can use the new value of variables set earlier in the `setq'. | |
| 1234 The return value of the `setq' form is the value of the last VAL. | |
| 1235 */ | |
| 1236 (args)) | |
| 1237 { | |
| 1238 /* This function can GC */ | |
| 1239 int nargs; | |
| 2421 | 1240 Lisp_Object retval = Qnil; |
| 428 | 1241 |
| 1242 GET_LIST_LENGTH (args, nargs); | |
| 1243 | |
| 1244 if (nargs & 1) /* Odd number of arguments? */ | |
| 1245 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs))); | |
| 1246 | |
| 2421 | 1247 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args) |
| 428 | 1248 { |
| 1249 val = Feval (val); | |
|
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|
1250 val = IGNORE_MULTIPLE_VALUES (val); |
| 428 | 1251 Fset (symbol, val); |
| 2421 | 1252 retval = val; |
| 428 | 1253 } |
| 1254 | |
| 2421 | 1255 END_GC_PROPERTY_LIST_LOOP (symbol); |
| 1256 | |
| 1257 return retval; | |
| 428 | 1258 } |
| 1259 | |
| 1260 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /* | |
| 1261 Return the argument, without evaluating it. `(quote x)' yields `x'. | |
| 3794 | 1262 |
| 3842 | 1263 `quote' differs from `function' in that it is a hint that an expression is |
| 1264 data, not a function. In particular, under some circumstances the byte | |
| 1265 compiler will compile an expression quoted with `function', but it will | |
| 1266 never do so for an expression quoted with `quote'. These issues are most | |
| 1267 important for lambda expressions (see `lambda'). | |
| 1268 | |
| 1269 There is an alternative, more readable, reader syntax for `quote': a Lisp | |
| 1270 object preceded by `''. Thus, `'x' is equivalent to `(quote x)', in all | |
| 1271 contexts. A print function may use either. Internally the expression is | |
| 1272 represented as `(quote x)'). | |
| 428 | 1273 */ |
| 1274 (args)) | |
| 1275 { | |
|
5207
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Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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|
1276 int nargs; |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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|
1277 |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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|
1278 GET_LIST_LENGTH (args, nargs); |
|
1096ef427b56
Error on too many arguments to #'function, #'quote.
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|
1279 if (nargs != 1) |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1280 { |
|
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Error on too many arguments to #'function, #'quote.
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|
1281 Fsignal (Qwrong_number_of_arguments, |
|
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Error on too many arguments to #'function, #'quote.
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|
1282 list2 (Qquote, make_int (nargs))); |
|
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Error on too many arguments to #'function, #'quote.
Aidan Kehoe <kehoea@parhasard.net>
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|
1283 } |
|
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|
1284 |
| 428 | 1285 return XCAR (args); |
| 1286 } | |
| 1287 | |
|
4744
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
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>
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diff
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|
1289 variety version, so why not make it a subr? */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1290 DEFUN ("quote-maybe", Fquote_maybe, 1, 1, 0, /* |
|
17f7e9191c0b
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diff
changeset
|
1291 Quote EXPR if it is not self quoting. |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1292 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
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>
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4693
diff
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|
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>
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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
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|
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>
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diff
changeset
|
1297 self-quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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4693
diff
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|
1298 */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
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|
1299 (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1300 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1301 if ((XTYPE (expr)) == Lisp_Type_Record) |
|
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Aidan Kehoe <kehoea@parhasard.net>
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changeset
|
1302 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1303 switch (XRECORD_LHEADER (expr)->type) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1304 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
1305 case lrecord_type_symbol: |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1306 if (NILP (expr) || (EQ (expr, Qt)) || SYMBOL_IS_KEYWORD (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1307 { |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1308 return expr; |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1309 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1310 break; |
|
17f7e9191c0b
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|
1311 case lrecord_type_cons: |
|
17f7e9191c0b
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|
1312 if (EQ (XCAR (expr), Qlambda)) |
|
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|
1313 { |
|
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|
1314 return expr; |
|
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|
1315 } |
|
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|
1316 break; |
|
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|
1317 |
|
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|
1318 case lrecord_type_vector: |
|
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1319 case lrecord_type_string: |
|
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1320 case lrecord_type_compiled_function: |
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1321 case lrecord_type_bit_vector: |
|
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1322 case lrecord_type_float: |
|
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1323 case lrecord_type_hash_table: |
|
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1324 case lrecord_type_char_table: |
|
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1325 case lrecord_type_range_table: |
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1326 case lrecord_type_bignum: |
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1327 case lrecord_type_ratio: |
|
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1328 case lrecord_type_bigfloat: |
|
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1329 return expr; |
|
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|
1330 } |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1331 return list2 (Qquote, expr); |
|
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|
1332 } |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
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|
1333 |
|
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|
1334 /* Fixnums and characters are self-quoting: */ |
|
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|
1335 return expr; |
|
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1336 } |
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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)'). | |
| 428 | 1353 */ |
| 1354 (args)) | |
| 1355 { | |
|
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1356 int nargs; |
|
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|
1357 |
|
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|
1358 GET_LIST_LENGTH (args, nargs); |
|
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|
1359 if (nargs != 1) |
|
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1360 { |
|
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|
1361 Fsignal (Qwrong_number_of_arguments, |
|
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|
1362 list2 (Qfunction, make_int (nargs))); |
|
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|
1363 } |
|
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|
1364 |
| 428 | 1365 return XCAR (args); |
| 1366 } | |
| 1367 | |
| 1368 | |
| 1369 /************************************************************************/ | |
| 1370 /* Defining functions/variables */ | |
| 1371 /************************************************************************/ | |
| 1372 static Lisp_Object | |
| 1373 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1374 { | |
| 1375 Ffset (name, defn); | |
|
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|
1376 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1377 return name; |
| 1378 } | |
| 1379 | |
| 1380 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
|
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|
1381 Define NAME as a function. |
| 428 | 1382 The definition is (lambda ARGLIST [DOCSTRING] BODY...). |
| 1383 See also the function `interactive'. | |
|
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|
1384 |
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|
1385 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1386 */ |
| 1387 (args)) | |
| 1388 { | |
| 1389 /* This function can GC */ | |
| 1390 return define_function (XCAR (args), | |
| 1391 Fcons (Qlambda, XCDR (args))); | |
| 1392 } | |
| 1393 | |
| 1394 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
|
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|
1395 Define NAME as a macro. |
| 428 | 1396 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). |
| 1397 When the macro is called, as in (NAME ARGS...), | |
| 1398 the function (lambda ARGLIST BODY...) is applied to | |
| 1399 the list ARGS... as it appears in the expression, | |
| 1400 and the result should be a form to be evaluated instead of the original. | |
|
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|
1401 |
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|
1402 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1403 */ |
| 1404 (args)) | |
| 1405 { | |
| 1406 /* This function can GC */ | |
| 1407 return define_function (XCAR (args), | |
| 1408 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1409 } | |
| 1410 | |
| 1411 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
|
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1412 Define SYMBOL as a variable. |
| 428 | 1413 You are not required to define a variable in order to use it, |
| 1414 but the definition can supply documentation and an initial value | |
| 1415 in a way that tags can recognize. | |
| 1416 | |
| 1417 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1418 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1419 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1420 void.) | |
| 1421 If SYMBOL is buffer-local, its default value is what is set; | |
| 1422 buffer-local values are not affected. | |
| 1423 INITVALUE and DOCSTRING are optional. | |
| 1424 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1425 This means that M-x set-variable recognizes it. |
| 428 | 1426 If INITVALUE is missing, SYMBOL's value is not set. |
| 1427 | |
| 1428 In lisp-interaction-mode defvar is treated as defconst. | |
|
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1429 |
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1430 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1431 */ |
| 1432 (args)) | |
| 1433 { | |
| 1434 /* This function can GC */ | |
| 1435 Lisp_Object sym = XCAR (args); | |
| 1436 | |
| 1437 if (!NILP (args = XCDR (args))) | |
| 1438 { | |
| 1439 Lisp_Object val = XCAR (args); | |
| 1440 | |
| 1441 if (NILP (Fdefault_boundp (sym))) | |
| 1442 { | |
| 1443 struct gcpro gcpro1; | |
| 1444 GCPRO1 (val); | |
|
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1445 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1446 Fset_default (sym, val); |
| 1447 UNGCPRO; | |
| 1448 } | |
| 1449 | |
| 1450 if (!NILP (args = XCDR (args))) | |
| 1451 { | |
| 1452 Lisp_Object doc = XCAR (args); | |
| 1453 Fput (sym, Qvariable_documentation, doc); | |
| 1454 if (!NILP (args = XCDR (args))) | |
| 563 | 1455 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1456 } |
| 1457 } | |
| 1458 | |
| 1459 #ifdef I18N3 | |
| 1460 if (!NILP (Vfile_domain)) | |
| 1461 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1462 #endif | |
| 1463 | |
| 1464 LOADHIST_ATTACH (sym); | |
| 1465 return sym; | |
| 1466 } | |
| 1467 | |
| 1468 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
|
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1469 Define SYMBOL as a constant variable. |
| 428 | 1470 The intent is that programs do not change this value, but users may. |
| 1471 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1472 If SYMBOL is buffer-local, its default value is what is set; | |
| 1473 buffer-local values are not affected. | |
| 1474 DOCSTRING is optional. | |
| 1475 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1476 This means that M-x set-variable recognizes it. |
| 428 | 1477 |
| 1478 Note: do not use `defconst' for user options in libraries that are not | |
| 1479 normally loaded, since it is useful for users to be able to specify | |
| 1480 their own values for such variables before loading the library. | |
| 1481 Since `defconst' unconditionally assigns the variable, | |
| 1482 it would override the user's choice. | |
|
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1483 |
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|
1484 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1485 */ |
| 1486 (args)) | |
| 1487 { | |
| 1488 /* This function can GC */ | |
| 1489 Lisp_Object sym = XCAR (args); | |
| 1490 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1491 struct gcpro gcpro1; | |
| 1492 | |
| 1493 GCPRO1 (val); | |
| 1494 | |
|
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1495 val = IGNORE_MULTIPLE_VALUES (val); |
|
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|
1496 |
| 428 | 1497 Fset_default (sym, val); |
| 1498 | |
| 1499 UNGCPRO; | |
| 1500 | |
| 1501 if (!NILP (args = XCDR (args))) | |
| 1502 { | |
| 1503 Lisp_Object doc = XCAR (args); | |
| 1504 Fput (sym, Qvariable_documentation, doc); | |
| 1505 if (!NILP (args = XCDR (args))) | |
| 563 | 1506 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1507 } |
| 1508 | |
| 1509 #ifdef I18N3 | |
| 1510 if (!NILP (Vfile_domain)) | |
| 1511 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1512 #endif | |
| 1513 | |
| 1514 LOADHIST_ATTACH (sym); | |
| 1515 return sym; | |
| 1516 } | |
| 1517 | |
|
4502
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Handle varalias chains, custom variables in #'user-variable-p.
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|
1518 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
|
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|
1519 with the symbol variable aliases. */ |
| 428 | 1520 |
| 1521 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1522 Return result of expanding macros at top level of FORM. | |
| 1523 If FORM is not a macro call, it is returned unchanged. | |
| 1524 Otherwise, the macro is expanded and the expansion is considered | |
| 1525 in place of FORM. When a non-macro-call results, it is returned. | |
| 1526 | |
| 442 | 1527 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1528 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1529 */ | |
| 442 | 1530 (form, environment)) |
| 428 | 1531 { |
| 1532 /* This function can GC */ | |
| 1533 /* With cleanups from Hallvard Furuseth. */ | |
| 1534 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1535 | |
| 1536 while (1) | |
| 1537 { | |
| 1538 /* Come back here each time we expand a macro call, | |
| 1539 in case it expands into another macro call. */ | |
| 1540 if (!CONSP (form)) | |
| 1541 break; | |
| 1542 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1543 def = sym = XCAR (form); | |
| 1544 tem = Qnil; | |
| 1545 /* Trace symbols aliases to other symbols | |
| 1546 until we get a symbol that is not an alias. */ | |
| 1547 while (SYMBOLP (def)) | |
| 1548 { | |
| 1549 QUIT; | |
| 1550 sym = def; | |
| 442 | 1551 tem = Fassq (sym, environment); |
| 428 | 1552 if (NILP (tem)) |
| 1553 { | |
| 1554 def = XSYMBOL (sym)->function; | |
| 1555 if (!UNBOUNDP (def)) | |
| 1556 continue; | |
| 1557 } | |
| 1558 break; | |
| 1559 } | |
| 442 | 1560 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1561 and if TEM is nil then DEF is SYM's function definition. */ |
| 1562 if (NILP (tem)) | |
| 1563 { | |
| 442 | 1564 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1565 Look at its function definition. */ |
| 1566 if (UNBOUNDP (def) | |
| 1567 || !CONSP (def)) | |
| 1568 /* Not defined or definition not suitable */ | |
| 1569 break; | |
| 1570 if (EQ (XCAR (def), Qautoload)) | |
| 1571 { | |
| 1572 /* Autoloading function: will it be a macro when loaded? */ | |
| 1573 tem = Felt (def, make_int (4)); | |
| 1574 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1575 { | |
| 1576 /* Yes, load it and try again. */ | |
| 970 | 1577 /* do_autoload GCPROs both arguments */ |
| 428 | 1578 do_autoload (def, sym); |
| 1579 continue; | |
| 1580 } | |
| 1581 else | |
| 1582 break; | |
| 1583 } | |
| 1584 else if (!EQ (XCAR (def), Qmacro)) | |
| 1585 break; | |
| 1586 else expander = XCDR (def); | |
| 1587 } | |
| 1588 else | |
| 1589 { | |
| 1590 expander = XCDR (tem); | |
| 1591 if (NILP (expander)) | |
| 1592 break; | |
| 1593 } | |
| 1594 form = apply1 (expander, XCDR (form)); | |
| 1595 } | |
| 1596 return form; | |
| 1597 } | |
| 1598 | |
| 1599 | |
| 1600 /************************************************************************/ | |
| 1601 /* Non-local exits */ | |
| 1602 /************************************************************************/ | |
| 1603 | |
| 1318 | 1604 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1605 | |
| 1606 int | |
| 1607 proper_redisplay_wrapping_in_place (void) | |
| 1608 { | |
| 1609 return !in_display | |
| 1610 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1611 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1612 } | |
| 1613 | |
| 1614 static void | |
| 1615 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1616 { | |
| 1617 assert_with_message | |
| 1618 (proper_redisplay_wrapping_in_place (), | |
| 1619 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1620 } | |
| 1621 | |
| 1622 static void | |
| 1623 check_proper_critical_section_lisp_protection (void) | |
| 1624 { | |
| 1625 assert_with_message | |
| 1626 (proper_redisplay_wrapping_in_place (), | |
| 1627 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1628 } | |
| 1629 | |
| 1630 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1631 | |
| 428 | 1632 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
|
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|
1633 Eval BODY allowing nonlocal exits using `throw'. |
| 428 | 1634 TAG is evalled to get the tag to use. Then the BODY is executed. |
| 3577 | 1635 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1636 If no throw happens, `catch' returns the value of the last BODY form. |
| 1637 If a throw happens, it specifies the value to return from `catch'. | |
|
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|
1638 |
|
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|
1639 arguments: (TAG &rest BODY) |
| 428 | 1640 */ |
| 1641 (args)) | |
| 1642 { | |
| 1643 /* This function can GC */ | |
| 1644 Lisp_Object tag = Feval (XCAR (args)); | |
| 1645 Lisp_Object body = XCDR (args); | |
| 2532 | 1646 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1647 } |
| 1648 | |
| 1649 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1650 FUNC should return a Lisp_Object. | |
| 1651 This is how catches are done from within C code. */ | |
| 1652 | |
| 1653 Lisp_Object | |
| 1654 internal_catch (Lisp_Object tag, | |
| 1655 Lisp_Object (*func) (Lisp_Object arg), | |
| 1656 Lisp_Object arg, | |
| 853 | 1657 int * volatile threw, |
| 2532 | 1658 Lisp_Object * volatile thrown_tag, |
| 1659 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1660 { |
| 1661 /* This structure is made part of the chain `catchlist'. */ | |
| 1662 struct catchtag c; | |
| 1663 | |
| 1664 /* Fill in the components of c, and put it on the list. */ | |
| 1665 c.next = catchlist; | |
| 1666 c.tag = tag; | |
| 853 | 1667 c.actual_tag = Qnil; |
| 2532 | 1668 c.backtrace = Qnil; |
| 428 | 1669 c.val = Qnil; |
| 1670 c.backlist = backtrace_list; | |
| 1671 #if 0 /* FSFmacs */ | |
| 1672 /* #### */ | |
| 1673 c.handlerlist = handlerlist; | |
| 1674 #endif | |
| 1675 c.lisp_eval_depth = lisp_eval_depth; | |
| 1676 c.pdlcount = specpdl_depth(); | |
| 1677 #if 0 /* FSFmacs */ | |
| 1678 c.poll_suppress_count = async_timer_suppress_count; | |
| 1679 #endif | |
| 1680 c.gcpro = gcprolist; | |
| 1681 catchlist = &c; | |
| 1682 | |
| 1683 /* Call FUNC. */ | |
| 1684 if (SETJMP (c.jmp)) | |
| 1685 { | |
| 1686 /* Throw works by a longjmp that comes right here. */ | |
| 1687 if (threw) *threw = 1; | |
| 853 | 1688 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1689 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1690 return c.val; |
| 1691 } | |
| 1692 c.val = (*func) (arg); | |
| 1693 if (threw) *threw = 0; | |
| 853 | 1694 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1695 catchlist = c.next; |
| 853 | 1696 check_catchlist_sanity (); |
| 428 | 1697 return c.val; |
| 1698 } | |
| 1699 | |
| 1700 | |
| 1701 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1702 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1703 | |
| 2297 | 1704 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1705 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1706 condition-case form has a TAG of Qnil. |
| 1707 | |
| 1708 Before each catch is discarded, unbind all special bindings and | |
| 1709 execute all unwind-protect clauses made above that catch. Unwind | |
| 1710 the handler stack as we go, so that the proper handlers are in | |
| 1711 effect for each unwind-protect clause we run. At the end, restore | |
| 1712 some static info saved in CATCH, and longjmp to the location | |
| 1713 specified in the | |
| 1714 | |
| 1715 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1716 | |
| 2268 | 1717 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1718 Lisp_Object)); | |
| 1719 | |
| 1720 static DOESNT_RETURN | |
| 853 | 1721 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1722 { |
| 1723 REGISTER int last_time; | |
| 1724 | |
| 1725 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1726 Before each catch is discarded, unbind all special bindings | |
| 1727 and execute all unwind-protect clauses made above that catch. | |
| 1728 At the end, restore some static info saved in CATCH, | |
| 1729 and longjmp to the location specified. | |
| 1730 */ | |
| 1731 | |
| 1732 /* Save the value somewhere it will be GC'ed. | |
| 1733 (Can't overwrite tag slot because an unwind-protect may | |
| 1734 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1735 c->val = val; | |
| 853 | 1736 c->actual_tag = tag; |
| 428 | 1737 |
| 1738 #if 0 /* FSFmacs */ | |
| 1739 /* Restore the polling-suppression count. */ | |
| 1740 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1741 #endif | |
| 1742 | |
| 617 | 1743 #if 1 |
| 428 | 1744 do |
| 1745 { | |
| 1746 last_time = catchlist == c; | |
| 1747 | |
| 1748 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1749 handlers. */ | |
| 771 | 1750 unbind_to (catchlist->pdlcount); |
| 428 | 1751 catchlist = catchlist->next; |
| 853 | 1752 check_catchlist_sanity (); |
| 428 | 1753 } |
| 1754 while (! last_time); | |
| 617 | 1755 #else |
| 1756 /* Former XEmacs code. This is definitely not as correct because | |
| 1757 there may be a number of catches we're unwinding, and a number | |
| 1758 of unwind-protects in the process. By not undoing the catches till | |
| 1759 the end, there may be invalid catches still current. (This would | |
| 1760 be a particular problem with code like this: | |
| 1761 | |
| 1762 (catch 'foo | |
| 1763 (call-some-code-which-does... | |
| 1764 (catch 'bar | |
| 1765 (unwind-protect | |
| 1766 (call-some-code-which-does... | |
| 1767 (catch 'bar | |
| 1768 (call-some-code-which-does... | |
| 1769 (throw 'foo nil)))) | |
| 1770 (throw 'bar nil))))) | |
| 1771 | |
| 1772 This would try to throw to the inner (catch 'bar)! | |
| 1773 | |
| 1774 --ben | |
| 1775 */ | |
| 428 | 1776 /* Unwind the specpdl stack */ |
| 771 | 1777 unbind_to (c->pdlcount); |
| 428 | 1778 catchlist = c->next; |
| 853 | 1779 check_catchlist_sanity (); |
| 617 | 1780 #endif /* Former code */ |
| 428 | 1781 |
| 1204 | 1782 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1783 if (profiling_active) |
| 1784 { | |
| 1785 while (backtrace_list != c->backlist) | |
| 1786 { | |
| 1787 profile_record_unwind (backtrace_list); | |
| 1788 backtrace_list = backtrace_list->next; | |
| 1789 } | |
| 1790 } | |
| 1791 else | |
| 1792 backtrace_list = c->backlist; | |
| 428 | 1793 lisp_eval_depth = c->lisp_eval_depth; |
| 1794 | |
| 442 | 1795 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1796 throw_level = 0; |
| 1797 #endif | |
| 1798 LONGJMP (c->jmp, 1); | |
| 1799 } | |
| 1800 | |
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1801 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
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1802 Lisp_Object, Lisp_Object)); |
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1803 |
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1804 DOESNT_RETURN |
| 428 | 1805 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
| 1806 Lisp_Object sig, Lisp_Object data) | |
| 1807 { | |
| 442 | 1808 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1809 /* die if we recurse more than is reasonable */ |
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1810 assert (++throw_level <= 20); |
| 428 | 1811 #endif |
| 1812 | |
| 1318 | 1813 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 1814 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 1815 #endif |
| 1123 | 1816 |
| 428 | 1817 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1818 "last resort" when there is no handler for this error and | |
| 1819 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1820 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1821 initialization stages) we would get in an infinite recursive |
| 1822 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1823 really-early-error-handler. | |
| 1824 | |
| 1825 Note that in fact the only time that the "last resort" | |
| 3025 | 1826 occurs is when there's no catch for `top-level' -- the |
| 1827 `top-level' catch and the catch-all error handler are | |
| 428 | 1828 established at the same time, in initial_command_loop/ |
| 1829 top_level_1. | |
| 1830 | |
| 853 | 1831 [[#### Fix this horrifitude!]] |
| 1832 | |
| 1833 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1834 */ |
| 1835 | |
| 1836 while (1) | |
| 1837 { | |
| 1838 REGISTER struct catchtag *c; | |
| 1839 | |
| 1840 #if 0 /* FSFmacs */ | |
| 1841 if (!NILP (tag)) /* #### */ | |
| 1842 #endif | |
| 1843 for (c = catchlist; c; c = c->next) | |
| 1844 { | |
| 2532 | 1845 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1846 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1847 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1848 unwind_to_catch (c, val, tag); | |
| 428 | 1849 } |
| 1850 if (!bomb_out_p) | |
| 1851 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1852 else | |
| 1853 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1854 } | |
| 1855 } | |
| 1856 | |
| 1857 /* See above, where CATCHLIST is defined, for a description of how | |
| 1858 Fthrow() works. | |
| 1859 | |
| 1860 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1861 back to the appropriate condition-case handler after (maybe) | |
| 1862 the debugger is entered. In that case, TAG is the value | |
| 1863 of Vcondition_handlers that was in place just after the | |
| 1864 condition-case handler was set up. The car of this will be | |
| 1865 some data referring to the handler: Its car will be Qunbound | |
| 1866 (thus, this tag can never be generated by Lisp code), and | |
| 1867 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1868 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1869 This works fine because Fthrow() does not care what TAG was | |
| 1870 passed to it: it just looks up the catch list for something | |
| 1871 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1872 back to the place that established the catch (in this case, | |
| 1873 condition_case_1). See below for more info. | |
| 1874 */ | |
| 1875 | |
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1876 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1877 Throw to the catch for TAG and return VALUE from it. |
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1878 |
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1879 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1880 back. Tags are the same if and only if they are `eq'. |
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1881 |
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1882 arguments: (TAG VALUE) |
| 428 | 1883 */ |
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1884 (args)) |
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1885 { |
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1886 int nargs; |
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1887 Lisp_Object tag, value; |
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1888 |
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1889 GET_LIST_LENGTH (args, nargs); |
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1890 if (nargs != 2) |
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1891 { |
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1892 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1893 } |
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1894 |
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1895 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1896 |
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1897 value = Feval (XCAR (XCDR (args))); |
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1898 |
| 444 | 1899 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1900 RETURN_NOT_REACHED (Qnil); |
| 428 | 1901 } |
| 1902 | |
| 1903 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1904 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1905 If BODYFORM completes normally, its value is returned | |
| 1906 after executing the UNWINDFORMS. | |
| 1907 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
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1908 |
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1909 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1910 */ |
| 1911 (args)) | |
| 1912 { | |
| 1913 /* This function can GC */ | |
| 1914 int speccount = specpdl_depth(); | |
| 1915 | |
| 1916 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1917 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1918 } |
| 1919 | |
| 1920 | |
| 1921 /************************************************************************/ | |
| 1292 | 1922 /* Trapping errors */ |
| 428 | 1923 /************************************************************************/ |
| 1924 | |
| 1925 static Lisp_Object | |
| 1926 condition_bind_unwind (Lisp_Object loser) | |
| 1927 { | |
| 617 | 1928 /* There is no problem freeing stuff here like there is in |
| 1929 condition_case_unwind(), because there are no outside pointers | |
| 1930 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1931 |
| 428 | 1932 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1933 Lisp_Object tem = XCAR (loser); | |
| 853 | 1934 int first = 1; |
| 428 | 1935 |
| 1936 while (CONSP (tem)) | |
| 1937 { | |
| 853 | 1938 Lisp_Object victim = tem; |
| 1939 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1940 free_opaque_ptr (XCAR (victim)); | |
| 1941 first = 0; | |
| 1942 tem = XCDR (victim); | |
| 428 | 1943 free_cons (victim); |
| 1944 } | |
| 1945 | |
| 1946 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1947 Vcondition_handlers = XCDR (loser); |
| 1948 | |
| 1949 free_cons (loser); | |
| 428 | 1950 return Qnil; |
| 1951 } | |
| 1952 | |
| 1953 static Lisp_Object | |
| 1954 condition_case_unwind (Lisp_Object loser) | |
| 1955 { | |
| 1956 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1957 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1958 catch. With the recent changes to unwind_to_catch(), the | |
| 1959 evil situation might not happen any more; it certainly could | |
| 1960 happen before because it did. But it's very precarious to rely | |
| 1961 on something like this. #### Instead we should rewrite, adopting | |
| 1962 the FSF's mechanism with a struct handler instead of | |
| 1963 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1964 to hold all of the values, and there's no possibility either of | |
| 1965 crashes from freeing objects too quickly, or objects not getting | |
| 1966 freed and hanging around till the next GC. | |
| 1967 | |
| 1968 In practice, the extra consing here should not matter because | |
| 1969 it only happens when we throw past the condition-case, which almost | |
| 1970 always is the result of an error. Most of the time, there will be | |
| 1971 no error, and we will free the objects below in the main function. | |
| 1972 | |
| 1973 --ben | |
| 1974 | |
| 1975 DO NOT DO: free_cons (XCAR (loser)); | |
| 1976 */ | |
| 1977 | |
| 428 | 1978 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1979 Vcondition_handlers = XCDR (loser); |
| 1980 | |
| 1981 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1982 return Qnil; |
| 1983 } | |
| 1984 | |
| 1985 /* Split out from condition_case_3 so that primitive C callers | |
| 1986 don't have to cons up a lisp handler form to be evaluated. */ | |
| 1987 | |
| 1988 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 1989 specified by HANDLERS. If no error occurs that is indicated by | |
| 1990 HANDLERS as something to be caught, the return value of this | |
| 1991 function is the return value from BFUN. If such an error does | |
| 1992 occur, HFUN is called, and its return value becomes the | |
| 1993 return value of condition_case_1(). The second argument passed | |
| 1994 to HFUN will always be HARG. The first argument depends on | |
| 1995 HANDLERS: | |
| 1996 | |
| 1997 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 1998 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 1999 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 2000 arguments passed to `signal'. The debugger is not invoked even if | |
| 2001 `debug-on-error' was set. | |
| 2002 | |
| 2003 A HANDLERS value of Qerror is the same as Qt except that the | |
| 2004 debugger is invoked if `debug-on-error' was set. | |
| 2005 | |
| 2006 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 2007 exactly as in `condition-case', and errors will be trapped | |
| 2008 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 2009 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 2010 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 2011 | |
| 2012 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 2013 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 2014 for why), establishes a catch whose tag is this new value of | |
| 2015 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 2016 it calls Fthrow(), setting TAG to this same new value of | |
| 2017 Vcondition_handlers and setting VAL to the same thing that will | |
| 2018 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 2019 jump point we just established, and we in turn just call the | |
| 2020 HFUN and return its value. | |
| 2021 | |
| 2022 For a real condition-case, HFUN will always be | |
| 2023 run_condition_case_handlers() and HARG is the argument VAR | |
| 2024 to condition-case. That function just binds VAR to the cons | |
| 2025 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 2026 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 2027 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 2028 it had *before* condition_case_1() was called. This maintains | |
| 2029 consistency (so that the state of things at exit of | |
| 2030 condition_case_1() is the same as at entry), and implies | |
| 2031 that the handler can signal the same error again (possibly | |
| 2032 after processing of its own), without getting in an infinite | |
| 2033 loop. */ | |
| 2034 | |
| 2035 Lisp_Object | |
| 2036 condition_case_1 (Lisp_Object handlers, | |
| 2037 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 2038 Lisp_Object barg, | |
| 2039 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2040 Lisp_Object harg) | |
| 2041 { | |
| 2042 int speccount = specpdl_depth(); | |
| 2043 struct catchtag c; | |
| 617 | 2044 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2045 |
| 2046 #if 0 /* FSFmacs */ | |
| 2047 c.tag = Qnil; | |
| 2048 #else | |
| 2049 /* Do consing now so out-of-memory error happens up front */ | |
| 2050 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2051 which is known specially by Fsignal. | |
| 617 | 2052 [[ This is an abomination, but to fix it would require either |
| 428 | 2053 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2054 or changing the byte-compiler output (no thanks).]] |
| 2055 | |
| 2056 The above comment is clearly wrong. FSF does not do it this way | |
| 2057 and did not change the byte-compiler output. Instead they use a | |
| 2058 `struct handler' to hold the various values (in place of our | |
| 2059 Vcondition_handlers) and chain them together, with pointers from | |
| 2060 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2061 consider moving to something similar, but not before I merge my | |
| 2062 stderr-proc workspace, which contains changes to these | |
| 2063 functions. --ben */ | |
| 428 | 2064 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2065 Vcondition_handlers); | |
| 2066 #endif | |
| 2067 c.val = Qnil; | |
| 853 | 2068 c.actual_tag = Qnil; |
| 2532 | 2069 c.backtrace = Qnil; |
| 428 | 2070 c.backlist = backtrace_list; |
| 2071 #if 0 /* FSFmacs */ | |
| 2072 /* #### */ | |
| 2073 c.handlerlist = handlerlist; | |
| 2074 #endif | |
| 2075 c.lisp_eval_depth = lisp_eval_depth; | |
| 2076 c.pdlcount = specpdl_depth(); | |
| 2077 #if 0 /* FSFmacs */ | |
| 2078 c.poll_suppress_count = async_timer_suppress_count; | |
| 2079 #endif | |
| 2080 c.gcpro = gcprolist; | |
| 2081 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2082 c.next = catchlist; | |
| 2083 | |
| 2084 if (SETJMP (c.jmp)) | |
| 2085 { | |
| 2086 /* throw does ungcpro, etc */ | |
| 2087 return (*hfun) (c.val, harg); | |
| 2088 } | |
| 2089 | |
| 2090 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2091 | |
| 2092 catchlist = &c; | |
| 2093 #if 0 /* FSFmacs */ | |
| 2094 h.handler = handlers; | |
| 2095 h.var = Qnil; | |
| 2096 h.next = handlerlist; | |
| 2097 h.tag = &c; | |
| 2098 handlerlist = &h; | |
| 2099 #else | |
| 2100 Vcondition_handlers = c.tag; | |
| 2101 #endif | |
| 2102 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2103 c.val = ((*bfun) (barg)); | |
| 2104 UNGCPRO; | |
| 617 | 2105 |
| 2106 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2107 GCPRO3 (harg, c.val, c.tag); | |
| 2108 | |
| 428 | 2109 catchlist = c.next; |
| 853 | 2110 check_catchlist_sanity (); |
| 617 | 2111 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2112 delete this here. */ | |
| 428 | 2113 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2114 unbind_to (speccount); |
| 617 | 2115 |
| 2116 UNGCPRO; | |
| 2117 /* free the conses *after* the unbind, because the unbind will run | |
| 2118 condition_case_unwind above. */ | |
| 853 | 2119 free_cons (XCAR (c.tag)); |
| 2120 free_cons (c.tag); | |
| 617 | 2121 return c.val; |
| 428 | 2122 } |
| 2123 | |
| 2124 static Lisp_Object | |
| 2125 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2126 { | |
| 2127 /* This function can GC */ | |
| 2128 #if 0 /* FSFmacs */ | |
| 2129 if (!NILP (h.var)) | |
| 2130 specbind (h.var, c.val); | |
| 2131 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2132 | |
| 2133 /* Note that this just undoes the binding of h.var; whoever | |
| 2134 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2135 throwing. */ | |
| 771 | 2136 unbind_to (c.pdlcount); |
| 428 | 2137 return val; |
| 2138 #else | |
| 2139 int speccount; | |
| 2140 | |
| 2141 CHECK_TRUE_LIST (val); | |
| 2142 if (NILP (var)) | |
| 2143 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2144 | |
| 2145 speccount = specpdl_depth(); | |
| 2146 specbind (var, Fcar (val)); | |
| 2147 val = Fprogn (Fcdr (val)); | |
| 771 | 2148 return unbind_to_1 (speccount, val); |
| 428 | 2149 #endif |
| 2150 } | |
| 2151 | |
| 2152 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2153 condition-case except that it takes three arguments rather | |
| 2154 than a single list of arguments. */ | |
| 2155 Lisp_Object | |
| 2156 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2157 { | |
| 2158 /* This function can GC */ | |
| 2159 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2160 { | |
| 2161 if (NILP (handler)) | |
| 2162 ; | |
| 2163 else if (CONSP (handler)) | |
| 2164 { | |
| 2165 Lisp_Object conditions = XCAR (handler); | |
| 2166 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2167 if (SYMBOLP (conditions)) | |
| 2168 ; | |
| 2169 else | |
| 2170 { | |
| 2171 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2172 if (!SYMBOLP (condition)) | |
| 2173 goto invalid_condition_handler; | |
| 2174 } | |
| 2175 } | |
| 2176 else | |
| 2177 { | |
| 2178 invalid_condition_handler: | |
| 563 | 2179 sferror ("Invalid condition handler", handler); |
| 428 | 2180 } |
| 2181 } | |
| 2182 | |
| 2183 CHECK_SYMBOL (var); | |
| 2184 | |
| 2185 return condition_case_1 (handlers, | |
| 2186 Feval, bodyform, | |
| 2187 run_condition_case_handlers, | |
| 2188 var); | |
| 2189 } | |
| 2190 | |
| 2191 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2192 Regain control when an error is signalled. | |
| 2193 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2194 Executes BODYFORM and returns its value if no error happens. | |
| 2195 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2196 where the BODY is made of Lisp expressions. | |
| 2197 | |
| 771 | 2198 A typical usage of `condition-case' looks like this: |
| 2199 | |
| 2200 (condition-case nil | |
| 2201 ;; you need a progn here if you want more than one statement ... | |
| 2202 (progn | |
| 2203 (do-something) | |
| 2204 (do-something-else)) | |
| 2205 (error | |
| 2206 (issue-warning-or) | |
| 2207 ;; but strangely, you don't need one here. | |
| 2208 (return-a-value-etc) | |
| 2209 )) | |
| 2210 | |
| 428 | 2211 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2212 error's condition names. If an error happens, the first applicable | |
| 2213 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2214 all errors, even those without the `error' condition name on them | |
| 2215 \(e.g. `quit'). | |
| 2216 | |
| 2217 The car of a handler may be a list of condition names | |
| 2218 instead of a single condition name. | |
| 2219 | |
| 2220 When a handler handles an error, | |
| 2221 control returns to the condition-case and the handler BODY... is executed | |
| 2222 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2223 VAR may be nil; then you do not get access to the signal information. | |
| 2224 | |
| 2225 The value of the last BODY form is returned from the condition-case. | |
| 2226 See also the function `signal' for more info. | |
| 2227 | |
| 2228 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2229 and the current catches, condition-cases, and bindings have all been | |
| 2230 popped back to the state they were in just before the call to | |
| 2231 `condition-case'. This means that resignalling the error from | |
| 2232 within the handler will not result in an infinite loop. | |
| 2233 | |
| 2234 If you want to establish an error handler that is called with the | |
| 2235 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2236 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2237 */ | |
| 2238 (args)) | |
| 2239 { | |
| 2240 /* This function can GC */ | |
| 2241 Lisp_Object var = XCAR (args); | |
| 2242 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2243 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2244 return condition_case_3 (bodyform, var, handlers); | |
| 2245 } | |
| 2246 | |
| 2247 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
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|
2248 Call FUNCTION with arguments ARGS, regaining control on error. |
|
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parents:
4686
diff
changeset
|
2249 |
|
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Add argument information to remaining MANY or UNEVALLED C subrs.
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4686
diff
changeset
|
2250 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2251 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2252 that was current when `signal' was called, rather than when the handler | |
| 2253 was established. | |
| 2254 | |
| 2255 HANDLER should be a function of one argument, which is a cons of the args | |
| 2256 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2257 `signal' is called (this differs from `condition-case', which allows | |
| 2258 you to specify which errors are trapped). If the handler function | |
| 2259 returns, `signal' continues as if the handler were never invoked. | |
| 2260 \(It continues to look for handlers established earlier than this one, | |
| 2261 and invokes the standard error-handler if none is found.) | |
|
4693
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4686
diff
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|
2262 |
|
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diff
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|
2263 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2264 */ |
| 2265 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2266 { | |
| 2267 /* This function can GC */ | |
| 2268 int speccount = specpdl_depth(); | |
| 2269 Lisp_Object tem; | |
| 2270 | |
| 853 | 2271 tem = Ffunction_max_args (args[0]); |
| 2272 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2273 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2274 invalid_argument ("Must be function of one argument", args[0]); | |
| 2275 | |
| 2276 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2277 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2278 record_unwind_protect (condition_bind_unwind, tem); | |
| 2279 Vcondition_handlers = tem; | |
| 2280 | |
| 2281 /* Caller should have GC-protected args */ | |
| 771 | 2282 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2283 } |
| 2284 | |
| 853 | 2285 /* This is the C version of the above function. It calls FUN, passing it |
| 2286 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2287 which they were signalled. (HANDLER is only invoked if there was no | |
| 2288 handler (either from condition-case or call-with-condition-handler) set | |
| 2289 later on that handled the signal; therefore, this is a real error. | |
| 2290 | |
| 2291 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2292 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2293 ARG be void * to facilitate passing structures, but I changed to | |
| 2294 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2295 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2296 to convert between Lisp_Objects and structure pointers. */ | |
| 2297 | |
| 2298 Lisp_Object | |
| 2299 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2300 Lisp_Object), | |
| 2301 Lisp_Object handler_arg, | |
| 2302 Lisp_Object (*fun) (Lisp_Object), | |
| 2303 Lisp_Object arg) | |
| 2304 { | |
| 2305 /* This function can GC */ | |
| 1111 | 2306 int speccount = specpdl_depth (); |
| 853 | 2307 Lisp_Object tem; |
| 2308 | |
| 2309 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2310 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2311 noseeum_cons (handler_arg, Qnil)), |
| 2312 Vcondition_handlers); | |
| 2313 record_unwind_protect (condition_bind_unwind, tem); | |
| 2314 Vcondition_handlers = tem; | |
| 2315 | |
| 2316 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2317 } | |
| 2318 | |
| 428 | 2319 static int |
| 2320 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2321 { | |
| 2322 if (EQ (type, Qt)) | |
| 2323 /* (condition-case c # (t c)) catches -all- signals | |
| 2324 * Use with caution! */ | |
| 2325 return 1; | |
| 2326 | |
| 2327 if (SYMBOLP (type)) | |
| 2328 return !NILP (Fmemq (type, conditions)); | |
| 2329 | |
| 2330 for (; CONSP (type); type = XCDR (type)) | |
| 2331 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2332 return 1; | |
| 2333 | |
| 2334 return 0; | |
| 2335 } | |
| 2336 | |
| 2337 static Lisp_Object | |
| 2338 return_from_signal (Lisp_Object value) | |
| 2339 { | |
| 2340 #if 1 | |
| 2341 /* Most callers are not prepared to handle gc if this | |
| 2342 returns. So, since this feature is not very useful, | |
| 2343 take it out. */ | |
| 2344 /* Have called debugger; return value to signaller */ | |
| 2345 return value; | |
| 2346 #else /* But the reality is that that stinks, because: */ | |
| 2347 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2348 to be continuable!! */ | |
| 563 | 2349 signal_error (Qunimplemented, |
| 2350 "Returning a value from an error is no longer supported", | |
| 2351 Qunbound); | |
| 428 | 2352 #endif |
| 2353 } | |
| 2354 | |
| 2355 | |
| 2356 /************************************************************************/ | |
| 2357 /* the workhorse error-signaling function */ | |
| 2358 /************************************************************************/ | |
| 2359 | |
| 853 | 2360 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2361 that won't get signalled for errors occurring when | |
| 2362 call_with_suspended_errors() was invoked. */ | |
| 2363 | |
| 872 | 2364 /* Don't make static or it might be compiled away */ |
| 2365 void signal_1 (void); | |
| 2366 | |
| 2367 void | |
| 853 | 2368 signal_1 (void) |
| 2369 { | |
| 2370 } | |
| 2371 | |
| 428 | 2372 /* #### This function has not been synched with FSF. It diverges |
| 2373 significantly. */ | |
| 2374 | |
| 853 | 2375 /* The simplest external error function: it would be called |
| 2376 signal_continuable_error() in the terminology below, but it's | |
| 2377 Lisp-callable. */ | |
| 2378 | |
| 2379 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2380 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2381 An error symbol is a symbol defined using `define-error'. | |
| 2382 DATA should be a list. Its elements are printed as part of the error message. | |
| 2383 If the signal is handled, DATA is made available to the handler. | |
| 2384 See also the function `signal-error', and the functions to handle errors: | |
| 2385 `condition-case' and `call-with-condition-handler'. | |
| 2386 | |
| 2387 Note that this function can return, if the debugger is invoked and the | |
| 2388 user invokes the "return from signal" option. | |
| 2389 */ | |
| 2390 (error_symbol, data)) | |
| 428 | 2391 { |
| 2392 /* This function can GC */ | |
| 853 | 2393 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2394 Lisp_Object conditions = Qnil; | |
| 2395 Lisp_Object handlers = Qnil; | |
| 428 | 2396 /* signal_call_debugger() could get called more than once |
| 2397 (once when a call-with-condition-handler is about to | |
| 2398 be dealt with, and another when a condition-case handler | |
| 2399 is about to be invoked). So make sure the debugger and/or | |
| 2400 stack trace aren't done more than once. */ | |
| 2401 int stack_trace_displayed = 0; | |
| 2402 int debugger_entered = 0; | |
| 853 | 2403 |
| 2404 /* Fsignal() is one of these functions that's called all the time | |
| 2405 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2406 protect the objects because all sorts of weird stuff could | |
| 2407 happen. */ | |
| 2408 | |
| 2409 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2410 | |
| 2411 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2412 signal_1 (); | |
| 428 | 2413 |
| 2414 if (!initialized) | |
| 2415 { | |
| 2416 /* who knows how much has been initialized? Safest bet is | |
| 2417 just to bomb out immediately. */ | |
| 771 | 2418 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2419 ABORT (); |
| 428 | 2420 } |
| 2421 | |
| 3092 | 2422 #ifndef NEW_GC |
| 1123 | 2423 assert (!gc_in_progress); |
| 3092 | 2424 #endif /* not NEW_GC */ |
| 1123 | 2425 |
| 2426 /* We abort if in_display and we are not protected, as garbage | |
| 2427 collections and non-local exits will invariably be fatal, but in | |
| 2428 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2429 */ | |
| 2430 | |
| 1318 | 2431 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2432 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2433 #endif |
| 428 | 2434 |
| 853 | 2435 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2436 |
| 2437 for (handlers = Vcondition_handlers; | |
| 2438 CONSP (handlers); | |
| 2439 handlers = XCDR (handlers)) | |
| 2440 { | |
| 2441 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2442 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2443 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2444 | |
| 2445 if (!UNBOUNDP (handler_fun)) | |
| 2446 { | |
| 2447 /* call-with-condition-handler */ | |
| 2448 Lisp_Object tem; | |
| 2449 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2450 struct gcpro ngcpro1; | |
| 2451 NGCPRO1 (all_handlers); | |
| 2452 Vcondition_handlers = outer_handlers; | |
| 2453 | |
| 853 | 2454 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2455 outer_handlers, 1, |
| 2456 &stack_trace_displayed, | |
| 2457 &debugger_entered); | |
| 2458 if (!UNBOUNDP (tem)) | |
| 2459 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2460 | |
| 853 | 2461 if (OPAQUE_PTRP (handler_fun)) |
| 2462 { | |
| 2463 if (NILP (handler_data)) | |
| 2464 { | |
| 2465 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2466 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2467 (get_opaque_ptr (handler_fun)); | |
| 2468 | |
| 2469 tem = (*hfun) (error_symbol, data); | |
| 2470 } | |
| 2471 else | |
| 2472 { | |
| 2473 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2474 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2475 (get_opaque_ptr (handler_fun)); | |
| 2476 | |
| 2477 assert (NILP (XCDR (handler_data))); | |
| 2478 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2479 } | |
| 2480 } | |
| 2481 else | |
| 2482 { | |
| 2483 tem = Fcons (error_symbol, data); | |
| 2484 if (NILP (handler_data)) | |
| 2485 tem = call1 (handler_fun, tem); | |
| 2486 else | |
| 2487 { | |
| 2488 /* (This code won't be used (for now?).) */ | |
| 2489 struct gcpro nngcpro1; | |
| 2490 Lisp_Object args[3]; | |
| 2491 NNGCPRO1 (args[0]); | |
| 2492 nngcpro1.nvars = 3; | |
| 2493 args[0] = handler_fun; | |
| 2494 args[1] = tem; | |
| 2495 args[2] = handler_data; | |
| 2496 nngcpro1.var = args; | |
| 2497 tem = Fapply (3, args); | |
| 2498 NNUNGCPRO; | |
| 2499 } | |
| 2500 } | |
| 428 | 2501 NUNGCPRO; |
| 2502 #if 0 | |
| 2503 if (!EQ (tem, Qsignal)) | |
| 2504 return return_from_signal (tem); | |
| 2505 #endif | |
| 2506 /* If handler didn't throw, try another handler */ | |
| 2507 Vcondition_handlers = all_handlers; | |
| 2508 } | |
| 2509 | |
| 2510 /* It's a condition-case handler */ | |
| 2511 | |
| 2512 /* t is used by handlers for all conditions, set up by C code. | |
| 2513 * debugger is not called even if debug_on_error */ | |
| 2514 else if (EQ (handler_data, Qt)) | |
| 2515 { | |
| 2516 UNGCPRO; | |
|
4677
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
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changeset
|
2517 throw_or_bomb_out (handlers, Fcons (error_symbol, data), |
|
8f1ee2d15784
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2518 0, Qnil, Qnil); |
| 428 | 2519 } |
| 2520 /* `error' is used similarly to the way `t' is used, but in | |
| 2521 addition it invokes the debugger if debug_on_error. | |
| 2522 This is normally used for the outer command-loop error | |
| 2523 handler. */ | |
| 2524 else if (EQ (handler_data, Qerror)) | |
| 2525 { | |
| 853 | 2526 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2527 data, | |
| 428 | 2528 outer_handlers, 0, |
| 2529 &stack_trace_displayed, | |
| 2530 &debugger_entered); | |
| 2531 | |
| 2532 UNGCPRO; | |
| 2533 if (!UNBOUNDP (tem)) | |
| 2534 return return_from_signal (tem); | |
| 2535 | |
| 853 | 2536 tem = Fcons (error_symbol, data); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2537 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2538 } |
| 2539 else | |
| 2540 { | |
| 2541 /* handler established by real (Lisp) condition-case */ | |
| 2542 Lisp_Object h; | |
| 2543 | |
| 2544 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2545 { | |
| 2546 Lisp_Object clause = Fcar (h); | |
| 2547 Lisp_Object tem = Fcar (clause); | |
| 2548 | |
| 2549 if (condition_type_p (tem, conditions)) | |
| 2550 { | |
| 853 | 2551 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2552 outer_handlers, 1, |
| 2553 &stack_trace_displayed, | |
| 2554 &debugger_entered); | |
| 2555 UNGCPRO; | |
| 2556 if (!UNBOUNDP (tem)) | |
| 2557 return return_from_signal (tem); | |
| 2558 | |
| 2559 /* Doesn't return */ | |
| 853 | 2560 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2561 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2562 } |
| 2563 } | |
| 2564 } | |
| 2565 } | |
| 2566 | |
| 2567 /* If no handler is present now, try to run the debugger, | |
| 2568 and if that fails, throw to top level. | |
| 2569 | |
| 2570 #### The only time that no handler is present is during | |
| 2571 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2572 there is no `top-level' catch. (That's why the |
| 428 | 2573 "bomb-out" hack was added.) |
| 2574 | |
| 853 | 2575 [[#### Fix this horrifitude!]] |
| 2576 | |
| 2577 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2578 | |
| 2579 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2580 &stack_trace_displayed, |
| 2581 &debugger_entered); | |
| 2582 UNGCPRO; | |
| 853 | 2583 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2584 data); /* Doesn't return */ | |
| 2268 | 2585 RETURN_NOT_REACHED (Qnil); |
| 428 | 2586 } |
| 2587 | |
| 2588 /****************** Error functions class 1 ******************/ | |
| 2589 | |
| 2590 /* Class 1: General functions that signal an error. | |
| 2591 These functions take an error type and a list of associated error | |
| 2592 data. */ | |
| 2593 | |
| 853 | 2594 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2595 |
| 2596 /* Signal a non-continuable error. */ | |
| 2597 | |
| 2598 DOESNT_RETURN | |
| 563 | 2599 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2600 { |
| 2601 for (;;) | |
| 2602 Fsignal (sig, data); | |
| 2603 } | |
| 853 | 2604 |
| 2605 #ifdef ERROR_CHECK_CATCH | |
| 2606 | |
| 2607 void | |
| 2608 check_catchlist_sanity (void) | |
| 2609 { | |
| 2610 #if 0 | |
| 2611 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2612 bug! */ | |
| 442 | 2613 struct catchtag *c; |
| 2614 int found_error_tag = 0; | |
| 2615 | |
| 2616 for (c = catchlist; c; c = c->next) | |
| 2617 { | |
| 2618 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2619 { | |
| 2620 found_error_tag = 1; | |
| 2621 break; | |
| 2622 } | |
| 2623 } | |
| 2624 | |
| 2625 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2626 #endif /* vou me tomar no cul */ |
| 2627 } | |
| 2628 | |
| 2629 void | |
| 2630 check_specbind_stack_sanity (void) | |
| 2631 { | |
| 2632 } | |
| 2633 | |
| 2634 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2635 |
| 2636 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2637 according to ERRB. CLASS is the class of warning and should | |
| 2638 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2639 Qresource, etc.). */ | |
| 2640 | |
| 2641 void | |
| 1204 | 2642 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2643 Error_Behavior errb) |
| 428 | 2644 { |
| 2645 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2646 return; | |
| 793 | 2647 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2648 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2649 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2650 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2651 else |
|
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2652 signal_error_1 (sig, data); |
| 428 | 2653 } |
| 2654 | |
| 2655 /* Signal a continuable error or display a warning or do nothing, | |
| 2656 according to ERRB. */ | |
| 2657 | |
| 2658 Lisp_Object | |
| 563 | 2659 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2660 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2661 { |
| 2662 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2663 return Qnil; | |
| 793 | 2664 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2665 { | |
| 1204 | 2666 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2667 return Qnil; |
| 2668 } | |
| 428 | 2669 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2670 { | |
| 1204 | 2671 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2672 return Qnil; |
| 2673 } | |
| 2674 else | |
| 2675 return Fsignal (sig, data); | |
| 2676 } | |
| 2677 | |
| 2678 | |
| 2679 /****************** Error functions class 2 ******************/ | |
| 2680 | |
| 563 | 2681 /* Class 2: Signal an error with a string and an associated object. |
| 2682 Normally these functions are used to attach one associated object, | |
| 2683 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2684 than one object, make a list of the objects with Qunbound as the | |
| 2685 first element. (If you have specifically two objects to attach, | |
| 2686 consider using the function in class 3 below.) These functions | |
| 2687 signal an error of a specified type, whose data is one or more | |
| 2688 objects (usually two), a string the related Lisp object(s) | |
| 2689 specified as FROB. */ | |
| 2690 | |
| 2691 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2692 to signal_error_1(). */ | |
| 2693 | |
| 2694 Lisp_Object | |
|
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2695 build_error_data (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2696 { |
| 2697 if (EQ (frob, Qunbound)) | |
| 2698 frob = Qnil; | |
| 2699 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2700 frob = XCDR (frob); | |
| 2701 else | |
| 2702 frob = list1 (frob); | |
| 2703 if (!reason) | |
| 2704 return frob; | |
| 2705 else | |
| 771 | 2706 return Fcons (build_msg_string (reason), frob); |
| 563 | 2707 } |
| 2708 | |
| 2709 DOESNT_RETURN | |
|
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2710 signal_error (Lisp_Object type, const Ascbyte *reason, Lisp_Object frob) |
| 563 | 2711 { |
| 2712 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2713 } | |
| 2714 | |
|
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2715 /* NOTE NOTE NOTE: If you feel you need signal_ierror() or something |
|
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2716 similar when reason is a non-ASCII message, you're probably doing |
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2717 something wrong. When you have an error message from an external |
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2718 source, you should put the error message as the first item in FROB and |
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|
2719 put a string in REASON indicating what you were doing when the error |
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|
2720 message occurred. Use signal_error_2() for such a case. */ |
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2721 |
| 563 | 2722 void |
|
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2723 maybe_signal_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2724 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2725 Error_Behavior errb) |
| 563 | 2726 { |
| 2727 /* Optimization: */ | |
| 2728 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2729 return; | |
| 1204 | 2730 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2731 } |
| 2732 | |
| 2733 Lisp_Object | |
|
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2734 signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2735 Lisp_Object frob) |
| 2736 { | |
| 2737 return Fsignal (type, build_error_data (reason, frob)); | |
| 2738 } | |
| 2739 | |
| 2740 Lisp_Object | |
|
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2741 maybe_signal_continuable_error (Lisp_Object type, const Ascbyte *reason, |
| 1204 | 2742 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2743 Error_Behavior errb) |
| 563 | 2744 { |
| 2745 /* Optimization: */ | |
| 2746 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2747 return Qnil; | |
| 2748 return maybe_signal_continuable_error_1 (type, | |
| 2749 build_error_data (reason, frob), | |
| 1204 | 2750 class_, errb); |
| 563 | 2751 } |
| 2752 | |
| 2753 | |
| 2754 /****************** Error functions class 3 ******************/ | |
| 2755 | |
| 2756 /* Class 3: Signal an error with a string and two associated objects. | |
| 2757 These functions signal an error of a specified type, whose data | |
| 2758 is three objects, a string and two related Lisp objects. | |
| 2759 (The equivalent could be accomplished using the class 2 functions, | |
| 2760 but these are more convenient in this particular case.) */ | |
| 2761 | |
| 2762 DOESNT_RETURN | |
|
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|
2763 signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2764 Lisp_Object frob0, Lisp_Object frob1) |
| 2765 { | |
| 771 | 2766 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2767 frob1)); |
| 2768 } | |
| 2769 | |
| 2770 void | |
|
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|
2771 maybe_signal_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2772 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2773 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2774 { |
| 2775 /* Optimization: */ | |
| 2776 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2777 return; | |
| 771 | 2778 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2779 frob1), class_, errb); |
| 563 | 2780 } |
| 2781 | |
| 2782 Lisp_Object | |
|
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2783 signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2784 Lisp_Object frob0, Lisp_Object frob1) |
| 2785 { | |
| 771 | 2786 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2787 frob1)); |
| 2788 } | |
| 2789 | |
| 2790 Lisp_Object | |
|
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2791 maybe_signal_continuable_error_2 (Lisp_Object type, const Ascbyte *reason, |
| 563 | 2792 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2793 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2794 { |
| 2795 /* Optimization: */ | |
| 2796 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2797 return Qnil; | |
| 2798 return maybe_signal_continuable_error_1 | |
| 771 | 2799 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2800 class_, errb); |
| 563 | 2801 } |
| 2802 | |
| 2803 | |
| 2804 /****************** Error functions class 4 ******************/ | |
| 2805 | |
| 2806 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2807 These functions signal an error of a specified type, whose data |
| 428 | 2808 is a single string, created using the arguments. */ |
| 2809 | |
| 2810 DOESNT_RETURN | |
|
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|
2811 signal_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 442 | 2812 { |
| 2813 Lisp_Object obj; | |
| 2814 va_list args; | |
| 2815 | |
| 2816 va_start (args, fmt); | |
|
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2817 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2818 va_end (args); |
| 2819 | |
| 2820 /* Fsignal GC-protects its args */ | |
| 563 | 2821 signal_error (type, 0, obj); |
| 442 | 2822 } |
| 2823 | |
| 2824 void | |
| 1204 | 2825 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
|
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|
2826 const Ascbyte *fmt, ...) |
| 442 | 2827 { |
| 2828 Lisp_Object obj; | |
| 2829 va_list args; | |
| 2830 | |
| 2831 /* Optimization: */ | |
| 2832 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2833 return; | |
| 2834 | |
| 2835 va_start (args, fmt); | |
|
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|
2836 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2837 va_end (args); |
| 2838 | |
| 2839 /* Fsignal GC-protects its args */ | |
| 1204 | 2840 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2841 } |
| 2842 | |
| 2843 Lisp_Object | |
|
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|
2844 signal_continuable_ferror (Lisp_Object type, const Ascbyte *fmt, ...) |
| 428 | 2845 { |
| 2846 Lisp_Object obj; | |
| 2847 va_list args; | |
| 2848 | |
| 2849 va_start (args, fmt); | |
|
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2850 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2851 va_end (args); |
| 2852 | |
| 2853 /* Fsignal GC-protects its args */ | |
| 2854 return Fsignal (type, list1 (obj)); | |
| 2855 } | |
| 2856 | |
| 2857 Lisp_Object | |
| 1204 | 2858 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
|
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|
2859 Error_Behavior errb, const Ascbyte *fmt, ...) |
| 442 | 2860 { |
| 2861 Lisp_Object obj; | |
| 2862 va_list args; | |
| 2863 | |
| 2864 /* Optimization: */ | |
| 2865 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2866 return Qnil; | |
| 2867 | |
| 2868 va_start (args, fmt); | |
|
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2869 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2870 va_end (args); |
| 2871 | |
| 2872 /* Fsignal GC-protects its args */ | |
| 1204 | 2873 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2874 } |
| 2875 | |
| 2876 | |
| 2877 /****************** Error functions class 5 ******************/ | |
| 2878 | |
| 563 | 2879 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2880 These functions signal an error of a specified type, whose data |
| 563 | 2881 is a one or more objects, a string (created using the arguments) |
| 2882 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2883 is the same as for class 2.) | |
| 2884 | |
| 2885 There is no need for a class 6 because you can always attach 2 | |
| 2886 objects using class 5 (for FROB, specify a list with three | |
| 2887 elements, the first of which is Qunbound), and these functions are | |
| 2888 not commonly used. | |
| 2889 */ | |
| 442 | 2890 |
| 2891 DOESNT_RETURN | |
|
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2892 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const Ascbyte *fmt, |
| 563 | 2893 ...) |
| 442 | 2894 { |
| 2895 Lisp_Object obj; | |
| 2896 va_list args; | |
| 2897 | |
| 2898 va_start (args, fmt); | |
|
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|
2899 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 442 | 2900 va_end (args); |
| 2901 | |
| 2902 /* Fsignal GC-protects its args */ | |
| 563 | 2903 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2904 } |
| 2905 | |
| 2906 void | |
| 563 | 2907 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2908 Lisp_Object class_, Error_Behavior errb, |
|
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|
2909 const Ascbyte *fmt, ...) |
| 442 | 2910 { |
| 2911 Lisp_Object obj; | |
| 2912 va_list args; | |
| 2913 | |
| 2914 /* Optimization: */ | |
| 2915 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2916 return; | |
| 2917 | |
| 2918 va_start (args, fmt); | |
|
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2919 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2920 va_end (args); |
| 2921 | |
| 2922 /* Fsignal GC-protects its args */ | |
| 1204 | 2923 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2924 errb); |
| 428 | 2925 } |
| 2926 | |
| 2927 Lisp_Object | |
| 563 | 2928 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
|
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|
2929 const Ascbyte *fmt, ...) |
| 428 | 2930 { |
| 2931 Lisp_Object obj; | |
| 2932 va_list args; | |
| 2933 | |
| 2934 va_start (args, fmt); | |
|
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|
2935 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2936 va_end (args); |
| 2937 | |
| 2938 /* Fsignal GC-protects its args */ | |
| 563 | 2939 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2940 } |
| 2941 | |
| 2942 Lisp_Object | |
| 563 | 2943 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2944 Lisp_Object class_, |
| 578 | 2945 Error_Behavior errb, |
|
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|
2946 const Ascbyte *fmt, ...) |
| 428 | 2947 { |
| 2948 Lisp_Object obj; | |
| 2949 va_list args; | |
| 2950 | |
| 2951 /* Optimization: */ | |
| 2952 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2953 return Qnil; | |
| 2954 | |
| 2955 va_start (args, fmt); | |
|
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2956 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 2957 va_end (args); |
| 2958 | |
| 2959 /* Fsignal GC-protects its args */ | |
| 563 | 2960 return maybe_signal_continuable_error_1 (type, |
| 2961 Fcons (obj, | |
| 2962 build_error_data (0, frob)), | |
| 1204 | 2963 class_, errb); |
| 428 | 2964 } |
| 2965 | |
| 2966 | |
| 2967 /* This is what the QUIT macro calls to signal a quit */ | |
| 2968 void | |
| 2969 signal_quit (void) | |
| 2970 { | |
| 853 | 2971 /* This function cannot GC. GC is prohibited because most callers do |
| 2972 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2973 --ben */ | |
| 2974 | |
| 2975 int count; | |
| 2976 | |
| 428 | 2977 if (EQ (Vquit_flag, Qcritical)) |
| 2978 debug_on_quit |= 2; /* set critical bit. */ | |
| 2979 Vquit_flag = Qnil; | |
| 853 | 2980 count = begin_gc_forbidden (); |
| 428 | 2981 /* note that this is continuable. */ |
| 2982 Fsignal (Qquit, Qnil); | |
| 853 | 2983 unbind_to (count); |
| 428 | 2984 } |
| 2985 | |
| 2986 | |
| 563 | 2987 /************************ convenience error functions ***********************/ |
| 2988 | |
| 436 | 2989 Lisp_Object |
| 428 | 2990 signal_void_function_error (Lisp_Object function) |
| 2991 { | |
| 436 | 2992 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 2993 } |
| 2994 | |
| 436 | 2995 Lisp_Object |
| 428 | 2996 signal_invalid_function_error (Lisp_Object function) |
| 2997 { | |
| 436 | 2998 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 2999 } |
| 3000 | |
| 436 | 3001 Lisp_Object |
| 428 | 3002 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 3003 { | |
| 436 | 3004 return Fsignal (Qwrong_number_of_arguments, |
| 3005 list2 (function, make_int (nargs))); | |
| 428 | 3006 } |
| 3007 | |
| 3008 /* Used in list traversal macros for efficiency. */ | |
| 436 | 3009 DOESNT_RETURN |
| 428 | 3010 signal_malformed_list_error (Lisp_Object list) |
| 3011 { | |
| 563 | 3012 signal_error (Qmalformed_list, 0, list); |
| 428 | 3013 } |
| 3014 | |
| 436 | 3015 DOESNT_RETURN |
| 428 | 3016 signal_malformed_property_list_error (Lisp_Object list) |
| 3017 { | |
| 563 | 3018 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 3019 } |
| 3020 | |
| 436 | 3021 DOESNT_RETURN |
| 428 | 3022 signal_circular_list_error (Lisp_Object list) |
| 3023 { | |
| 563 | 3024 signal_error (Qcircular_list, 0, list); |
| 428 | 3025 } |
| 3026 | |
| 436 | 3027 DOESNT_RETURN |
| 428 | 3028 signal_circular_property_list_error (Lisp_Object list) |
| 3029 { | |
| 563 | 3030 signal_error (Qcircular_property_list, 0, list); |
| 428 | 3031 } |
| 442 | 3032 |
| 2267 | 3033 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 3034 DOESNT_RETURN |
|
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|
3035 syntax_error (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3036 { |
| 563 | 3037 signal_error (Qsyntax_error, reason, frob); |
| 442 | 3038 } |
| 3039 | |
| 3040 DOESNT_RETURN | |
|
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3041 syntax_error_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3042 { |
| 563 | 3043 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 3044 } | |
| 3045 | |
| 3046 void | |
|
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Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3047 maybe_syntax_error (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3048 Lisp_Object class_, Error_Behavior errb) |
| 3049 { | |
| 3050 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3051 } |
| 3052 | |
| 3053 DOESNT_RETURN | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3054 sferror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3055 { |
| 3056 signal_error (Qstructure_formation_error, reason, frob); | |
| 3057 } | |
| 3058 | |
| 3059 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3060 sferror_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3061 { |
| 3062 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3063 } | |
| 3064 | |
| 3065 void | |
|
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Ben Wing <ben@xemacs.org>
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diff
changeset
|
3066 maybe_sferror (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3067 Lisp_Object class_, Error_Behavior errb) |
| 3068 { | |
| 3069 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3070 } |
| 3071 | |
| 3072 DOESNT_RETURN | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3073 invalid_argument (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3074 { |
| 563 | 3075 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3076 } |
| 3077 | |
| 3078 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3079 invalid_argument_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3080 Lisp_Object frob2) |
| 442 | 3081 { |
| 563 | 3082 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3083 } | |
| 3084 | |
| 3085 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3086 maybe_invalid_argument (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3087 Lisp_Object class_, Error_Behavior errb) |
| 3088 { | |
| 3089 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3090 } |
| 3091 | |
| 3092 DOESNT_RETURN | |
|
5084
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3093 invalid_keyword_argument (Lisp_Object function, Lisp_Object keyword) |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3094 { |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3095 signal_error_1 (Qinvalid_keyword_argument, list2 (function, keyword)); |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3096 } |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
parents:
5050
diff
changeset
|
3097 |
|
6afe991b8135
Add a PARSE_KEYWORDS macro, use it in #'make-hash-table.
Aidan Kehoe <kehoea@parhasard.net>
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5050
diff
changeset
|
3098 DOESNT_RETURN |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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diff
changeset
|
3099 invalid_constant (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3100 { |
| 3101 signal_error (Qinvalid_constant, reason, frob); | |
| 3102 } | |
| 3103 | |
| 3104 DOESNT_RETURN | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3105 invalid_constant_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3106 Lisp_Object frob2) |
| 563 | 3107 { |
| 3108 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3109 } | |
| 3110 | |
| 3111 void | |
|
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19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3112 maybe_invalid_constant (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3113 Lisp_Object class_, Error_Behavior errb) |
| 3114 { | |
| 3115 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3116 } |
| 3117 | |
| 3118 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3119 invalid_operation (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3120 { |
| 563 | 3121 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3122 } |
| 3123 | |
| 3124 DOESNT_RETURN | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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changeset
|
3125 invalid_operation_2 (const Ascbyte *reason, Lisp_Object frob1, |
| 609 | 3126 Lisp_Object frob2) |
| 442 | 3127 { |
| 563 | 3128 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3129 } | |
| 3130 | |
| 3131 void | |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3132 maybe_invalid_operation (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3133 Lisp_Object class_, Error_Behavior errb) |
| 3134 { | |
| 3135 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3136 } |
| 3137 | |
| 3138 DOESNT_RETURN | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3139 invalid_change (const Ascbyte *reason, Lisp_Object frob) |
| 442 | 3140 { |
| 563 | 3141 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3142 } |
| 3143 | |
| 3144 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3145 invalid_change_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3146 { |
| 563 | 3147 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3148 } | |
| 3149 | |
| 3150 void | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3151 maybe_invalid_change (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3152 Lisp_Object class_, Error_Behavior errb) |
| 3153 { | |
| 3154 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3155 } |
| 3156 | |
| 3157 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3158 invalid_state (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3159 { |
| 3160 signal_error (Qinvalid_state, reason, frob); | |
| 3161 } | |
| 3162 | |
| 3163 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3164 invalid_state_2 (const Ascbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3165 { |
| 3166 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3167 } | |
| 3168 | |
| 3169 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3170 maybe_invalid_state (const Ascbyte *reason, Lisp_Object frob, |
| 1204 | 3171 Lisp_Object class_, Error_Behavior errb) |
| 3172 { | |
| 3173 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3174 } |
| 3175 | |
| 3176 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3177 wtaerror (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3178 { |
| 3179 signal_error (Qwrong_type_argument, reason, frob); | |
| 3180 } | |
| 3181 | |
| 3182 DOESNT_RETURN | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3183 stack_overflow (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3184 { |
| 3185 signal_error (Qstack_overflow, reason, frob); | |
| 3186 } | |
| 3187 | |
| 3188 DOESNT_RETURN | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
3189 out_of_memory (const Ascbyte *reason, Lisp_Object frob) |
| 563 | 3190 { |
| 3191 signal_error (Qout_of_memory, reason, frob); | |
| 3192 } | |
| 3193 | |
| 428 | 3194 |
| 3195 /************************************************************************/ | |
| 3196 /* User commands */ | |
| 3197 /************************************************************************/ | |
| 3198 | |
| 3199 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3200 Return t if FUNCTION makes provisions for interactive calling. | |
| 3201 This means it contains a description for how to read arguments to give it. | |
| 3202 The value is nil for an invalid function or a symbol with no function | |
| 3203 definition. | |
| 3204 | |
| 3205 Interactively callable functions include | |
| 3206 | |
| 3207 -- strings and vectors (treated as keyboard macros) | |
| 3208 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3209 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3210 (i.e. the interactive flag) | |
| 3211 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3212 value | |
| 3213 -- subrs (built-in functions) that are interactively callable | |
| 3214 | |
| 3215 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3216 */ | |
| 3217 (function)) | |
| 3218 { | |
| 3219 Lisp_Object fun = indirect_function (function, 0); | |
| 3220 | |
| 3221 if (COMPILED_FUNCTIONP (fun)) | |
| 3222 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3223 | |
| 3224 /* Lists may represent commands. */ | |
| 3225 if (CONSP (fun)) | |
| 3226 { | |
| 3227 Lisp_Object funcar = XCAR (fun); | |
| 3228 if (EQ (funcar, Qlambda)) | |
| 3229 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3230 if (EQ (funcar, Qautoload)) | |
| 3231 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3232 else | |
| 3233 return Qnil; | |
| 3234 } | |
| 3235 | |
| 3236 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3237 interactive spec. */ | |
| 3238 if (SUBRP (fun)) | |
| 3239 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3240 | |
| 3241 /* Strings and vectors are keyboard macros. */ | |
| 3242 if (VECTORP (fun) || STRINGP (fun)) | |
| 3243 return Qt; | |
| 3244 | |
| 3245 /* Everything else (including Qunbound) is not a command. */ | |
| 3246 return Qnil; | |
| 3247 } | |
| 3248 | |
| 3249 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3250 Execute CMD as an editor command. | |
| 3251 CMD must be an object that satisfies the `commandp' predicate. | |
| 3252 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3253 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3254 when reading the arguments. | |
| 3255 */ | |
| 444 | 3256 (cmd, record_flag, keys)) |
| 428 | 3257 { |
| 3258 /* This function can GC */ | |
| 3259 Lisp_Object prefixarg; | |
| 3260 Lisp_Object final = cmd; | |
| 4162 | 3261 PROFILE_DECLARE(); |
| 428 | 3262 struct console *con = XCONSOLE (Vselected_console); |
| 3263 | |
| 3264 prefixarg = con->prefix_arg; | |
| 3265 con->prefix_arg = Qnil; | |
| 3266 Vcurrent_prefix_arg = prefixarg; | |
| 3267 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3268 | |
| 3269 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3270 return run_hook (Qdisabled_command_hook); |
| 428 | 3271 |
| 3272 for (;;) | |
| 3273 { | |
| 3274 final = indirect_function (cmd, 1); | |
| 3275 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3276 { |
| 3277 /* do_autoload GCPROs both arguments */ | |
| 3278 do_autoload (final, cmd); | |
| 3279 } | |
| 428 | 3280 else |
| 3281 break; | |
| 3282 } | |
| 3283 | |
| 3284 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3285 { | |
| 3286 backtrace.function = &Qcall_interactively; | |
| 3287 backtrace.args = &cmd; | |
| 3288 backtrace.nargs = 1; | |
| 3289 backtrace.evalargs = 0; | |
| 1292 | 3290 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3291 backtrace.debug_on_exit = 0; |
| 1292 | 3292 backtrace.function_being_called = 0; |
| 428 | 3293 PUSH_BACKTRACE (backtrace); |
| 3294 | |
| 1292 | 3295 PROFILE_ENTER_FUNCTION (); |
| 444 | 3296 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3297 PROFILE_EXIT_FUNCTION (); |
| 428 | 3298 |
| 3299 POP_BACKTRACE (backtrace); | |
| 3300 return final; | |
| 3301 } | |
| 3302 else if (STRINGP (final) || VECTORP (final)) | |
| 3303 { | |
| 3304 return Fexecute_kbd_macro (final, prefixarg); | |
| 3305 } | |
| 3306 else | |
| 3307 { | |
| 3308 Fsignal (Qwrong_type_argument, | |
| 3309 Fcons (Qcommandp, | |
| 3310 (EQ (cmd, final) | |
| 3311 ? list1 (cmd) | |
| 3312 : list2 (cmd, final)))); | |
| 3313 return Qnil; | |
| 3314 } | |
| 3315 } | |
| 3316 | |
| 3317 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3318 Return t if function in which this appears was called interactively. | |
| 3319 This means that the function was called with call-interactively (which | |
| 3320 includes being called as the binding of a key) | |
| 3321 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3322 */ | |
| 3323 ()) | |
| 3324 { | |
| 3325 REGISTER struct backtrace *btp; | |
| 3326 REGISTER Lisp_Object fun; | |
| 3327 | |
| 3328 if (!INTERACTIVE) | |
| 3329 return Qnil; | |
| 3330 | |
| 3331 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3332 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3333 function). Note that *btp->function may be a symbol pointing at a | |
| 3334 compiled function. */ | |
| 3335 btp = backtrace_list; | |
| 3336 | |
| 3337 #if 0 /* FSFmacs */ | |
| 3338 | |
| 3339 /* #### FSFmacs does the following instead. I can't figure | |
| 3340 out which one is more correct. */ | |
| 3341 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3342 the top for Finteractive_p itself. If so, skip it. */ | |
| 3343 fun = Findirect_function (*btp->function); | |
| 3344 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3345 btp = btp->next; | |
| 3346 | |
| 3347 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3348 may be a frame for Fbyte_code. Now, given the strictest | |
| 3349 definition, this function isn't really being called | |
| 3350 interactively, but because that's the way Emacs 18 always builds | |
| 3351 byte-compiled functions, we'll accept it for now. */ | |
| 3352 if (EQ (*btp->function, Qbyte_code)) | |
| 3353 btp = btp->next; | |
| 3354 | |
| 3355 /* If this isn't a byte-compiled function, then we may now be | |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
3356 looking at several frames for special operators. Skip past them. */ |
| 428 | 3357 while (btp && |
| 3358 btp->nargs == UNEVALLED) | |
| 3359 btp = btp->next; | |
| 3360 | |
| 3361 #else | |
| 3362 | |
| 3363 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3364 btp = btp->next; | |
| 3365 for (; | |
| 3366 btp && (btp->nargs == UNEVALLED | |
| 3367 || EQ (*btp->function, Qbyte_code)); | |
| 3368 btp = btp->next) | |
| 3369 {} | |
| 3370 /* btp now points at the frame of the innermost function | |
| 3371 that DOES eval its args. | |
| 3372 If it is a built-in function (such as load or eval-region) | |
| 3373 return nil. */ | |
| 3374 /* Beats me why this is necessary, but it is */ | |
| 3375 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3376 return Qt; | |
| 3377 | |
| 3378 #endif | |
| 3379 | |
| 3380 fun = Findirect_function (*btp->function); | |
| 3381 if (SUBRP (fun)) | |
| 3382 return Qnil; | |
| 3383 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3384 Return t if that function was called interactively. */ | |
| 3385 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3386 return Qt; | |
| 3387 return Qnil; | |
| 3388 } | |
| 3389 | |
| 3390 | |
| 3391 /************************************************************************/ | |
| 3392 /* Autoloading */ | |
| 3393 /************************************************************************/ | |
| 3394 | |
| 3395 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3396 Define FUNCTION to autoload from FILENAME. |
| 3397 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3398 The remaining optional arguments provide additional info about the | |
| 3399 real definition. | |
| 3400 DOCSTRING is documentation for FUNCTION. | |
| 3401 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3402 TYPE indicates the type of the object: | |
| 428 | 3403 nil or omitted says FUNCTION is a function, |
| 3404 `keymap' says FUNCTION is really a keymap, and | |
| 3405 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3406 If FUNCTION already has a non-void function definition that is not an |
| 3407 autoload object, this function does nothing and returns nil. | |
| 428 | 3408 */ |
| 444 | 3409 (function, filename, docstring, interactive, type)) |
| 428 | 3410 { |
| 3411 /* This function can GC */ | |
| 3412 CHECK_SYMBOL (function); | |
| 444 | 3413 CHECK_STRING (filename); |
| 428 | 3414 |
| 3415 /* If function is defined and not as an autoload, don't override */ | |
| 3416 { | |
| 3417 Lisp_Object f = XSYMBOL (function)->function; | |
| 3418 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3419 return Qnil; | |
| 3420 } | |
| 3421 | |
| 3422 if (purify_flag) | |
| 3423 { | |
| 3424 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3425 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3426 } |
| 440 | 3427 |
| 444 | 3428 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3429 docstring, |
| 3430 interactive, | |
| 3431 type))); | |
| 3432 } | |
| 3433 | |
| 3434 Lisp_Object | |
| 3435 un_autoload (Lisp_Object oldqueue) | |
| 3436 { | |
| 3437 /* This function can GC */ | |
| 3438 REGISTER Lisp_Object queue, first, second; | |
| 3439 | |
| 3440 /* Queue to unwind is current value of Vautoload_queue. | |
| 3441 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3442 queue = Vautoload_queue; | |
| 3443 Vautoload_queue = oldqueue; | |
| 3444 while (CONSP (queue)) | |
| 3445 { | |
| 3446 first = XCAR (queue); | |
| 3447 second = Fcdr (first); | |
| 3448 first = Fcar (first); | |
| 3449 if (NILP (second)) | |
| 3450 Vfeatures = first; | |
| 3451 else | |
| 3452 Ffset (first, second); | |
| 3453 queue = Fcdr (queue); | |
| 3454 } | |
| 3455 return Qnil; | |
| 3456 } | |
| 3457 | |
| 970 | 3458 /* do_autoload GCPROs both arguments */ |
| 428 | 3459 void |
| 3460 do_autoload (Lisp_Object fundef, | |
| 3461 Lisp_Object funname) | |
| 3462 { | |
| 3463 /* This function can GC */ | |
| 3464 int speccount = specpdl_depth(); | |
| 3465 Lisp_Object fun = funname; | |
| 970 | 3466 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3467 |
| 3468 CHECK_SYMBOL (funname); | |
| 970 | 3469 GCPRO3 (fundef, funname, fun); |
| 428 | 3470 |
| 3471 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3472 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3473 Vautoload_queue = Qt; | |
| 3474 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3475 | |
| 3476 { | |
| 3477 Lisp_Object queue; | |
| 3478 | |
| 3479 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3480 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3481 { | |
| 3482 Lisp_Object first = XCAR (queue); | |
| 3483 Lisp_Object second = Fcdr (first); | |
| 3484 | |
| 3485 first = Fcar (first); | |
| 3486 | |
| 3487 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3488 may be an atom if the autoload entry was generated by a defalias | |
| 3489 or fset. */ | |
| 3490 if (CONSP (second)) | |
| 3491 Fput (first, Qautoload, (XCDR (second))); | |
| 3492 } | |
| 3493 } | |
| 3494 | |
| 3495 /* Once loading finishes, don't undo it. */ | |
| 3496 Vautoload_queue = Qt; | |
| 771 | 3497 unbind_to (speccount); |
| 428 | 3498 |
| 3499 fun = indirect_function (fun, 0); | |
| 3500 | |
| 3501 #if 0 /* FSFmacs */ | |
| 3502 if (!NILP (Fequal (fun, fundef))) | |
| 3503 #else | |
| 3504 if (UNBOUNDP (fun) | |
| 3505 || (CONSP (fun) | |
| 3506 && EQ (XCAR (fun), Qautoload))) | |
| 3507 #endif | |
| 563 | 3508 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3509 UNGCPRO; |
| 3510 } | |
| 3511 | |
| 3512 | |
| 3513 /************************************************************************/ | |
| 3514 /* eval, funcall, apply */ | |
| 3515 /************************************************************************/ | |
| 3516 | |
| 814 | 3517 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3518 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3519 -- in particular, the calling of subrs and compiled functions, the most | |
| 3520 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3521 to do to squeeze more speed out except by switching to lexical | |
| 3522 variables, which would eliminate the specbind loop. (But the real gain | |
| 3523 from lexical variables would come from better optimization -- with | |
| 3524 dynamic binding, you have the constant problem that any function call | |
| 3525 that you haven't explicitly proven to be side-effect-free might | |
| 3526 potentially side effect your local variables, which makes optimization | |
| 3527 extremely difficult when there are function calls anywhere in a chunk of | |
| 3528 code to be optimized. Even worse, you don't know that *your* local | |
| 3529 variables aren't side-effecting an outer function's local variables, so | |
| 3530 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3531 | |
| 428 | 3532 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3533 int nargs, Lisp_Object args[]); |
| 428 | 3534 static int in_warnings; |
| 3535 | |
| 3536 | |
| 814 | 3537 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3538 int nargs, | |
| 3539 Lisp_Object args[]); | |
| 3540 | |
| 3541 /* The theory behind making this a separate function is to shrink | |
| 3542 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3543 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3544 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3545 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3546 | |
| 3547 void | |
| 3548 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3549 Lisp_Object args[]) | |
| 3550 { | |
| 3551 REGISTER int i = 0; | |
| 3552 int max_non_rest_args = f->args_in_array - 1; | |
| 3553 int bindargs = min (nargs, max_non_rest_args); | |
| 3554 | |
| 3555 for (i = 0; i < bindargs; i++) | |
| 3092 | 3556 #ifdef NEW_GC |
| 3557 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3558 args[i]); | |
| 3559 #else /* not NEW_GC */ | |
| 814 | 3560 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3561 #endif /* not NEW_GC */ |
| 814 | 3562 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3563 #ifdef NEW_GC |
| 3564 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3565 Qnil); | |
| 3566 #else /* not NEW_GC */ | |
| 814 | 3567 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3568 #endif /* not NEW_GC */ |
| 3569 #ifdef NEW_GC | |
| 3570 SPECBIND_FAST_UNSAFE | |
| 3571 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3572 nargs > max_non_rest_args ? | |
| 3573 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3574 Qnil); | |
| 3575 #else /* not NEW_GC */ | |
| 814 | 3576 SPECBIND_FAST_UNSAFE |
| 3577 (f->args[max_non_rest_args], | |
| 3578 nargs > max_non_rest_args ? | |
| 3579 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3580 Qnil); | |
| 3092 | 3581 #endif /* not NEW_GC */ |
| 814 | 3582 } |
| 3583 | |
| 3584 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3585 in ARGS, and return the result of evaluation. */ | |
| 3586 inline static Lisp_Object | |
| 3587 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3588 { | |
| 3589 /* This function can GC */ | |
| 3590 int speccount = specpdl_depth(); | |
| 3591 REGISTER int i = 0; | |
| 3592 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3593 | |
| 3594 if (!OPAQUEP (f->instructions)) | |
| 3595 /* Lazily munge the instructions into a more efficient form */ | |
| 3596 optimize_compiled_function (fun); | |
| 3597 | |
| 3598 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3599 the required space on the specbinding stack for binding the args | |
| 3600 and local variables of fun. So just reserve it once. */ | |
| 3601 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3602 | |
| 3603 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3604 optional arguments. */ | |
| 3605 { | |
| 3606 #if 1 | |
| 3607 for (i = 0; i < nargs; i++) | |
| 3092 | 3608 #ifdef NEW_GC |
| 3609 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3610 args[i]); | |
| 3611 #else /* not NEW_GC */ | |
| 814 | 3612 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3613 #endif /* not NEW_GC */ |
| 814 | 3614 #else |
| 3615 /* Here's an alternate way to write the loop that tries to further | |
| 3616 optimize funcalls for functions with few arguments by partially | |
| 3617 unrolling the loop. It's not clear whether this is a win since it | |
| 3618 increases the size of the function and the possibility of L1 cache | |
| 3619 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3620 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3621 compiler repeatedly and looking at the total time, show very | |
| 3622 little difference between the simple loop above, the unrolled code | |
| 3623 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3624 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3625 because it's smaller. */ | |
| 3626 switch (nargs) | |
| 3627 { | |
| 3628 default: | |
| 3629 for (i = nargs - 1; i >= 4; i--) | |
| 3630 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3631 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3632 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3633 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3634 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3635 case 0: break; | |
| 3636 } | |
| 3637 #endif | |
| 3638 } | |
| 3639 else if (nargs < f->min_args) | |
| 3640 goto wrong_number_of_arguments; | |
| 3641 else if (nargs < f->max_args) | |
| 3642 { | |
| 3643 for (i = 0; i < nargs; i++) | |
| 3092 | 3644 #ifdef NEW_GC |
| 3645 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3646 args[i]); | |
| 3647 #else /* not NEW_GC */ | |
| 814 | 3648 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3649 #endif /* not NEW_GC */ |
| 814 | 3650 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3651 #ifdef NEW_GC |
| 3652 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3653 Qnil); | |
| 3654 #else /* not NEW_GC */ | |
| 814 | 3655 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3656 #endif /* not NEW_GC */ |
| 814 | 3657 } |
| 3658 else if (f->max_args == MANY) | |
| 3659 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3660 else | |
| 3661 { | |
| 3662 wrong_number_of_arguments: | |
| 3663 /* The actual printed compiled_function object is incomprehensible. | |
| 3664 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3665 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3666 fun = *backtrace_list->function; | |
| 3667 return Fsignal (Qwrong_number_of_arguments, | |
| 3668 list2 (fun, make_int (nargs))); | |
| 3669 } | |
| 3670 | |
| 3671 { | |
| 3672 Lisp_Object value = | |
| 3673 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
|
3674 #ifdef ERROR_CHECK_BYTE_CODE |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3675 XOPAQUE_SIZE (f->instructions) / |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3676 sizeof (Opbyte), |
|
17362f371cc2
add more byte-code assertions and better failure output
Ben Wing <ben@xemacs.org>
parents:
4905
diff
changeset
|
3677 #endif |
| 814 | 3678 f->stack_depth, |
| 3679 XVECTOR_DATA (f->constants)); | |
| 3680 | |
| 3681 /* The attempt to optimize this by only unbinding variables failed | |
| 3682 because using buffer-local variables as function parameters | |
| 3683 leads to specpdl_ptr->func != 0 */ | |
| 3684 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3685 UNBIND_TO_GCPRO (speccount, value); | |
| 3686 return value; | |
| 3687 } | |
| 3688 } | |
| 3689 | |
| 428 | 3690 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3691 Evaluate FORM and return its value. | |
| 3692 */ | |
| 3693 (form)) | |
| 3694 { | |
| 3695 /* This function can GC */ | |
| 3696 Lisp_Object fun, val, original_fun, original_args; | |
| 3697 int nargs; | |
| 4162 | 3698 PROFILE_DECLARE(); |
| 428 | 3699 |
| 1318 | 3700 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3701 check_proper_critical_section_lisp_protection (); | |
| 3702 #endif | |
| 3703 | |
| 3989 | 3704 if (!CONSP (form)) |
| 3705 { | |
| 3706 if (SYMBOLP (form)) | |
| 3707 { | |
| 3708 return Fsymbol_value (form); | |
| 3709 } | |
| 3710 | |
| 3711 return form; | |
| 3712 } | |
| 3713 | |
| 428 | 3714 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3715 while (!in_warnings && !NILP (Vpending_warnings) |
| 3716 /* well, perhaps not so safe after all! */ | |
| 3717 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3718 { |
| 3719 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3720 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3721 int speccount = internal_bind_int (&in_warnings, 1); |
| 3722 | |
| 428 | 3723 this_warning_cons = Vpending_warnings; |
| 3724 this_warning = XCAR (this_warning_cons); | |
| 3725 /* in case an error occurs in the warn function, at least | |
| 3726 it won't happen infinitely */ | |
| 3727 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3728 free_cons (this_warning_cons); |
| 1204 | 3729 class_ = XCAR (this_warning); |
| 428 | 3730 level = XCAR (XCDR (this_warning)); |
| 3731 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3732 free_list (this_warning); | |
| 3733 | |
| 3734 if (NILP (Vpending_warnings)) | |
| 3735 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3736 but safer */ | |
| 3737 | |
| 1204 | 3738 GCPRO4 (form, class_, level, messij); |
| 428 | 3739 if (!STRINGP (messij)) |
| 3740 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3741 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3742 UNGCPRO; |
| 771 | 3743 unbind_to (speccount); |
| 428 | 3744 } |
| 3745 | |
| 3746 QUIT; | |
| 814 | 3747 if (need_to_garbage_collect) |
| 428 | 3748 { |
| 3749 struct gcpro gcpro1; | |
| 3750 GCPRO1 (form); | |
| 3092 | 3751 #ifdef NEW_GC |
| 3752 gc_incremental (); | |
| 3753 #else /* not NEW_GC */ | |
| 428 | 3754 garbage_collect_1 (); |
| 3092 | 3755 #endif /* not NEW_GC */ |
| 428 | 3756 UNGCPRO; |
| 3757 } | |
| 3758 | |
| 3759 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3760 { | |
| 3761 if (max_lisp_eval_depth < 100) | |
| 3762 max_lisp_eval_depth = 100; | |
| 3763 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3764 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3765 Qunbound); | |
| 428 | 3766 } |
| 3767 | |
| 3768 /* We guaranteed CONSP (form) above */ | |
| 3769 original_fun = XCAR (form); | |
| 3770 original_args = XCDR (form); | |
| 3771 | |
| 3772 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3773 | |
| 3774 backtrace.pdlcount = specpdl_depth(); | |
| 3775 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3776 backtrace.args = &original_args; | |
| 3777 backtrace.nargs = UNEVALLED; | |
| 3778 backtrace.evalargs = 1; | |
| 3779 backtrace.debug_on_exit = 0; | |
| 1292 | 3780 backtrace.function_being_called = 0; |
| 428 | 3781 PUSH_BACKTRACE (backtrace); |
| 3782 | |
| 3783 if (debug_on_next_call) | |
| 3784 do_debug_on_call (Qt); | |
| 3785 | |
| 3786 /* At this point, only original_fun and original_args | |
| 3787 have values that will be used below. */ | |
| 3788 retry: | |
| 3989 | 3789 /* Optimise for no indirection. */ |
| 3790 fun = original_fun; | |
| 3791 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3792 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3793 { | |
| 3794 fun = indirect_function(original_fun, 1); | |
| 3795 } | |
| 428 | 3796 |
| 3797 if (SUBRP (fun)) | |
| 3798 { | |
| 3799 Lisp_Subr *subr = XSUBR (fun); | |
| 3800 int max_args = subr->max_args; | |
| 3801 | |
| 3802 if (nargs < subr->min_args) | |
| 3803 goto wrong_number_of_arguments; | |
| 3804 | |
| 3805 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3806 { | |
| 3807 backtrace.evalargs = 0; | |
| 1292 | 3808 PROFILE_ENTER_FUNCTION (); |
| 428 | 3809 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3810 (original_args)); | |
| 1292 | 3811 PROFILE_EXIT_FUNCTION (); |
| 428 | 3812 } |
| 3813 else if (nargs <= max_args) | |
| 3814 { | |
| 3815 struct gcpro gcpro1; | |
| 3816 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3817 REGISTER Lisp_Object *p = args; | |
| 3818 | |
| 3819 GCPRO1 (args[0]); | |
| 3820 gcpro1.nvars = 0; | |
| 3821 | |
| 3822 { | |
| 3823 LIST_LOOP_2 (arg, original_args) | |
| 3824 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3825 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3826 gcpro1.nvars++; |
| 3827 } | |
| 3828 } | |
| 3829 | |
| 3830 /* &optional args default to nil. */ | |
| 3831 while (p - args < max_args) | |
| 3832 *p++ = Qnil; | |
| 3833 | |
| 3834 backtrace.args = args; | |
| 3835 backtrace.nargs = nargs; | |
| 3836 | |
| 1292 | 3837 PROFILE_ENTER_FUNCTION (); |
| 428 | 3838 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3839 PROFILE_EXIT_FUNCTION (); |
| 428 | 3840 |
| 3841 UNGCPRO; | |
| 3842 } | |
| 3843 else if (max_args == MANY) | |
| 3844 { | |
| 3845 /* Pass a vector of evaluated arguments */ | |
| 3846 struct gcpro gcpro1; | |
| 3847 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3848 REGISTER Lisp_Object *p = args; | |
| 3849 | |
| 3850 GCPRO1 (args[0]); | |
| 3851 gcpro1.nvars = 0; | |
| 3852 | |
| 3853 { | |
| 3854 LIST_LOOP_2 (arg, original_args) | |
| 3855 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3856 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3857 gcpro1.nvars++; |
| 3858 } | |
| 3859 } | |
| 3860 | |
| 3861 backtrace.args = args; | |
| 3862 backtrace.nargs = nargs; | |
| 3863 | |
| 1292 | 3864 PROFILE_ENTER_FUNCTION (); |
| 428 | 3865 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3866 (nargs, args)); | |
| 1292 | 3867 PROFILE_EXIT_FUNCTION (); |
| 428 | 3868 |
| 3869 UNGCPRO; | |
| 3870 } | |
| 3871 else | |
| 3872 { | |
| 3873 wrong_number_of_arguments: | |
| 440 | 3874 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3875 } |
| 3876 } | |
| 3877 else if (COMPILED_FUNCTIONP (fun)) | |
| 3878 { | |
| 3879 struct gcpro gcpro1; | |
| 3880 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3881 REGISTER Lisp_Object *p = args; | |
| 3882 | |
| 3883 GCPRO1 (args[0]); | |
| 3884 gcpro1.nvars = 0; | |
| 3885 | |
| 3886 { | |
| 3887 LIST_LOOP_2 (arg, original_args) | |
| 3888 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3889 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3890 gcpro1.nvars++; |
| 3891 } | |
| 3892 } | |
| 3893 | |
| 3894 backtrace.args = args; | |
| 3895 backtrace.nargs = nargs; | |
| 3896 backtrace.evalargs = 0; | |
| 3897 | |
| 1292 | 3898 PROFILE_ENTER_FUNCTION (); |
| 428 | 3899 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3900 PROFILE_EXIT_FUNCTION (); |
| 428 | 3901 |
| 3902 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3903 if (backtrace.debug_on_exit) | |
| 3904 val = do_debug_on_exit (val); | |
| 3905 /* Don't do it again when we return to eval. */ | |
| 3906 backtrace.debug_on_exit = 0; | |
| 3907 | |
| 3908 UNGCPRO; | |
| 3909 } | |
| 3910 else if (CONSP (fun)) | |
| 3911 { | |
| 3912 Lisp_Object funcar = XCAR (fun); | |
| 3913 | |
| 3914 if (EQ (funcar, Qautoload)) | |
| 3915 { | |
| 970 | 3916 /* do_autoload GCPROs both arguments */ |
| 428 | 3917 do_autoload (fun, original_fun); |
| 3918 goto retry; | |
| 3919 } | |
| 3920 else if (EQ (funcar, Qmacro)) | |
| 3921 { | |
| 1292 | 3922 PROFILE_ENTER_FUNCTION (); |
| 428 | 3923 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3924 PROFILE_EXIT_FUNCTION (); |
| 428 | 3925 } |
| 3926 else if (EQ (funcar, Qlambda)) | |
| 3927 { | |
| 3928 struct gcpro gcpro1; | |
| 3929 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3930 REGISTER Lisp_Object *p = args; | |
| 3931 | |
| 3932 GCPRO1 (args[0]); | |
| 3933 gcpro1.nvars = 0; | |
| 3934 | |
| 3935 { | |
| 3936 LIST_LOOP_2 (arg, original_args) | |
| 3937 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3938 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3939 gcpro1.nvars++; |
| 3940 } | |
| 3941 } | |
| 3942 | |
| 3943 UNGCPRO; | |
| 3944 | |
| 3945 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3946 backtrace.nargs = nargs; | |
| 3947 backtrace.evalargs = 0; | |
| 3948 | |
| 1292 | 3949 PROFILE_ENTER_FUNCTION (); |
| 428 | 3950 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3951 PROFILE_EXIT_FUNCTION (); |
| 428 | 3952 |
| 3953 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3954 if (backtrace.debug_on_exit) | |
| 3955 val = do_debug_on_exit (val); | |
| 3956 /* Don't do it again when we return to eval. */ | |
| 3957 backtrace.debug_on_exit = 0; | |
| 3958 } | |
| 3959 else | |
| 3960 { | |
| 3961 goto invalid_function; | |
| 3962 } | |
| 3963 } | |
| 4104 | 3964 else if (UNBOUNDP (fun)) |
| 3965 { | |
| 3966 val = signal_void_function_error (original_fun); | |
| 3967 } | |
| 3968 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3969 UNBOUNDP (fun)) */ | |
| 428 | 3970 { |
| 3971 invalid_function: | |
| 436 | 3972 val = signal_invalid_function_error (fun); |
| 428 | 3973 } |
| 3974 | |
| 3975 lisp_eval_depth--; | |
| 3976 if (backtrace.debug_on_exit) | |
| 3977 val = do_debug_on_exit (val); | |
| 3978 POP_BACKTRACE (backtrace); | |
| 3979 return val; | |
| 3980 } | |
| 3981 | |
| 3982 | |
| 1111 | 3983 |
| 3984 static void | |
| 3985 run_post_gc_hook (void) | |
| 3986 { | |
| 3987 Lisp_Object args[2]; | |
| 3988 | |
| 3989 args[0] = Qpost_gc_hook; | |
| 3990 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 3991 | |
| 3992 run_hook_with_args_trapping_problems | |
| 1333 | 3993 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 3994 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 3995 } | |
| 3996 | |
| 428 | 3997 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
|
3998 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 3999 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
|
4000 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4001 arguments: (FUNCTION &rest ARGS) |
| 428 | 4002 */ |
| 4003 (int nargs, Lisp_Object *args)) | |
| 4004 { | |
| 4005 /* This function can GC */ | |
| 4006 Lisp_Object fun; | |
| 4007 Lisp_Object val; | |
| 4162 | 4008 PROFILE_DECLARE(); |
| 428 | 4009 int fun_nargs = nargs - 1; |
| 4010 Lisp_Object *fun_args = args + 1; | |
| 4011 | |
| 1318 | 4012 /* QUIT will check for proper redisplay wrapping */ |
| 4013 | |
| 428 | 4014 QUIT; |
| 851 | 4015 |
| 4016 if (funcall_allocation_flag) | |
| 4017 { | |
| 4018 if (need_to_garbage_collect) | |
| 4019 /* Callers should gcpro lexpr args */ | |
| 3092 | 4020 #ifdef NEW_GC |
| 4021 gc_incremental (); | |
| 4022 #else /* not NEW_GC */ | |
| 851 | 4023 garbage_collect_1 (); |
| 3092 | 4024 #endif /* not NEW_GC */ |
| 851 | 4025 if (need_to_check_c_alloca) |
| 4026 { | |
| 4027 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 4028 { | |
| 4029 xemacs_c_alloca (0); | |
| 4030 funcall_alloca_count = 0; | |
| 4031 } | |
| 4032 } | |
| 887 | 4033 if (need_to_signal_post_gc) |
| 4034 { | |
| 4035 need_to_signal_post_gc = 0; | |
| 1111 | 4036 recompute_funcall_allocation_flag (); |
| 3263 | 4037 #ifdef NEW_GC |
| 4038 run_finalizers (); | |
| 4039 #endif /* NEW_GC */ | |
| 1111 | 4040 run_post_gc_hook (); |
| 887 | 4041 } |
| 851 | 4042 } |
| 428 | 4043 |
| 4044 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 4045 { | |
| 4046 if (max_lisp_eval_depth < 100) | |
| 4047 max_lisp_eval_depth = 100; | |
| 4048 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 4049 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 4050 Qunbound); | |
| 428 | 4051 } |
| 4052 | |
| 1292 | 4053 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4054 backtrace.function = &args[0]; |
| 4055 backtrace.args = fun_args; | |
| 4056 backtrace.nargs = fun_nargs; | |
| 4057 backtrace.evalargs = 0; | |
| 4058 backtrace.debug_on_exit = 0; | |
| 1292 | 4059 backtrace.function_being_called = 0; |
| 428 | 4060 PUSH_BACKTRACE (backtrace); |
| 4061 | |
| 4062 if (debug_on_next_call) | |
| 4063 do_debug_on_call (Qlambda); | |
| 4064 | |
| 4065 retry: | |
| 4066 | |
| 4067 fun = args[0]; | |
| 4068 | |
| 4069 /* We could call indirect_function directly, but profiling shows | |
| 4070 this is worth optimizing by partially unrolling the loop. */ | |
| 4071 if (SYMBOLP (fun)) | |
| 4072 { | |
| 4073 fun = XSYMBOL (fun)->function; | |
| 4074 if (SYMBOLP (fun)) | |
| 4075 { | |
| 4076 fun = XSYMBOL (fun)->function; | |
| 4077 if (SYMBOLP (fun)) | |
| 4078 fun = indirect_function (fun, 1); | |
| 4079 } | |
| 4080 } | |
| 4081 | |
| 4082 if (SUBRP (fun)) | |
| 4083 { | |
| 4084 Lisp_Subr *subr = XSUBR (fun); | |
| 4085 int max_args = subr->max_args; | |
| 4086 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4087 | |
| 4088 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4089 { | |
| 4090 funcall_subr: | |
| 1292 | 4091 PROFILE_ENTER_FUNCTION (); |
| 428 | 4092 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4093 PROFILE_EXIT_FUNCTION (); |
| 428 | 4094 } |
| 436 | 4095 else if (fun_nargs < subr->min_args) |
| 4096 { | |
| 4097 goto wrong_number_of_arguments; | |
| 4098 } | |
| 428 | 4099 else if (fun_nargs < max_args) |
| 4100 { | |
| 4101 Lisp_Object *p = spacious_args; | |
| 4102 | |
| 4103 /* Default optionals to nil */ | |
| 4104 while (fun_nargs--) | |
| 4105 *p++ = *fun_args++; | |
| 4106 while (p - spacious_args < max_args) | |
| 4107 *p++ = Qnil; | |
| 4108 | |
| 4109 fun_args = spacious_args; | |
| 4110 goto funcall_subr; | |
| 4111 } | |
| 4112 else if (max_args == MANY) | |
| 4113 { | |
| 1292 | 4114 PROFILE_ENTER_FUNCTION (); |
| 436 | 4115 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4116 PROFILE_EXIT_FUNCTION (); |
| 428 | 4117 } |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4118 else if (max_args == UNEVALLED) /* Can't funcall a special operator */ |
| 428 | 4119 { |
|
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
|
4120 |
|
18c0b5909d16
Use keywords in structure syntax; new #define, NEED_TO_HANDLE_21_4_CODE 1
Aidan Kehoe <kehoea@parhasard.net>
parents:
5207
diff
changeset
|
4121 #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
|
4122 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4123 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4124 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4125 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4126 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4127 } |
|
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
|
4128 #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
|
4129 |
| 428 | 4130 goto invalid_function; |
| 4131 } | |
| 4132 else | |
| 4133 { | |
| 4134 wrong_number_of_arguments: | |
| 436 | 4135 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4136 } |
| 4137 } | |
| 4138 else if (COMPILED_FUNCTIONP (fun)) | |
| 4139 { | |
| 1292 | 4140 PROFILE_ENTER_FUNCTION (); |
| 428 | 4141 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4142 PROFILE_EXIT_FUNCTION (); |
| 428 | 4143 } |
| 4144 else if (CONSP (fun)) | |
| 4145 { | |
| 4146 Lisp_Object funcar = XCAR (fun); | |
| 4147 | |
| 4148 if (EQ (funcar, Qlambda)) | |
| 4149 { | |
| 1292 | 4150 PROFILE_ENTER_FUNCTION (); |
| 428 | 4151 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4152 PROFILE_EXIT_FUNCTION (); |
| 428 | 4153 } |
| 4154 else if (EQ (funcar, Qautoload)) | |
| 4155 { | |
| 970 | 4156 /* do_autoload GCPROs both arguments */ |
| 428 | 4157 do_autoload (fun, args[0]); |
| 4158 goto retry; | |
| 4159 } | |
| 4160 else /* Can't funcall a macro */ | |
| 4161 { | |
| 4162 goto invalid_function; | |
| 4163 } | |
| 4164 } | |
| 4165 else if (UNBOUNDP (fun)) | |
| 4166 { | |
| 436 | 4167 val = signal_void_function_error (args[0]); |
| 428 | 4168 } |
| 4169 else | |
| 4170 { | |
| 4171 invalid_function: | |
| 436 | 4172 val = signal_invalid_function_error (fun); |
| 428 | 4173 } |
| 4174 | |
| 4175 lisp_eval_depth--; | |
| 4176 if (backtrace.debug_on_exit) | |
| 4177 val = do_debug_on_exit (val); | |
| 4178 POP_BACKTRACE (backtrace); | |
| 4179 return val; | |
| 4180 } | |
| 4181 | |
| 4182 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4183 Return t if OBJECT can be called as a function, else nil. | |
| 4184 A function is an object that can be applied to arguments, | |
| 4185 using for example `funcall' or `apply'. | |
| 4186 */ | |
| 4187 (object)) | |
| 4188 { | |
| 4189 if (SYMBOLP (object)) | |
| 4190 object = indirect_function (object, 0); | |
| 4191 | |
|
4795
084056f46755
#'functionp gives nil for special forms, as in CL and GNU Emacs 23.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4744
diff
changeset
|
4192 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
|
4193 || (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
|
4194 && (XSUBR (object)->max_args != UNEVALLED))) |
| 919 | 4195 return Qt; |
| 4196 if (CONSP (object)) | |
| 4197 { | |
| 4198 Lisp_Object car = XCAR (object); | |
| 4199 if (EQ (car, Qlambda)) | |
| 4200 return Qt; | |
| 4201 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
|
4202 && 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
|
4203 (Fcdr_safe (XCDR (object))))))) |
| 919 | 4204 return Qt; |
| 4205 } | |
| 4206 return Qnil; | |
| 428 | 4207 } |
| 4208 | |
| 4209 static Lisp_Object | |
| 4210 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4211 { | |
| 4212 Lisp_Object orig_function = function; | |
| 4213 Lisp_Object arglist; | |
| 4214 | |
| 4215 retry: | |
| 4216 | |
| 4217 if (SYMBOLP (function)) | |
| 4218 function = indirect_function (function, 1); | |
| 4219 | |
| 4220 if (SUBRP (function)) | |
| 4221 { | |
| 442 | 4222 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4223 if (function_min_args_p) | |
| 4224 return Fsubr_min_args (function); | |
| 4225 else | |
| 4226 return Fsubr_max_args (function); | |
| 428 | 4227 } |
| 4228 else if (COMPILED_FUNCTIONP (function)) | |
| 4229 { | |
| 814 | 4230 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4231 | |
| 1737 | 4232 if (!OPAQUEP (f->instructions)) |
| 4233 /* Lazily munge the instructions into a more efficient form */ | |
| 4234 /* Needed to set max_args */ | |
| 4235 optimize_compiled_function (function); | |
| 4236 | |
| 814 | 4237 if (function_min_args_p) |
| 4238 return make_int (f->min_args); | |
| 4239 else if (f->max_args == MANY) | |
| 4240 return Qnil; | |
| 4241 else | |
| 4242 return make_int (f->max_args); | |
| 428 | 4243 } |
| 4244 else if (CONSP (function)) | |
| 4245 { | |
| 4246 Lisp_Object funcar = XCAR (function); | |
| 4247 | |
| 4248 if (EQ (funcar, Qmacro)) | |
| 4249 { | |
| 4250 function = XCDR (function); | |
| 4251 goto retry; | |
| 4252 } | |
| 4253 else if (EQ (funcar, Qautoload)) | |
| 4254 { | |
| 970 | 4255 /* do_autoload GCPROs both arguments */ |
| 428 | 4256 do_autoload (function, orig_function); |
| 442 | 4257 function = orig_function; |
| 428 | 4258 goto retry; |
| 4259 } | |
| 4260 else if (EQ (funcar, Qlambda)) | |
| 4261 { | |
| 4262 arglist = Fcar (XCDR (function)); | |
| 4263 } | |
| 4264 else | |
| 4265 { | |
| 4266 goto invalid_function; | |
| 4267 } | |
| 4268 } | |
| 4269 else | |
| 4270 { | |
| 4271 invalid_function: | |
| 442 | 4272 return signal_invalid_function_error (orig_function); |
| 428 | 4273 } |
| 4274 | |
| 4275 { | |
| 4276 int argcount = 0; | |
| 4277 | |
| 4278 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4279 { | |
| 4280 if (EQ (arg, Qand_optional)) | |
| 4281 { | |
| 4282 if (function_min_args_p) | |
| 4283 break; | |
| 4284 } | |
| 4285 else if (EQ (arg, Qand_rest)) | |
| 4286 { | |
| 4287 if (function_min_args_p) | |
| 4288 break; | |
| 4289 else | |
| 4290 return Qnil; | |
| 4291 } | |
| 4292 else | |
| 4293 { | |
| 4294 argcount++; | |
| 4295 } | |
| 4296 } | |
| 4297 | |
| 4298 return make_int (argcount); | |
| 4299 } | |
| 4300 } | |
| 4301 | |
| 4302 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4303 Return the minimum number of arguments a function may be called with. |
| 428 | 4304 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
|
4305 any special operator, or any macro. |
| 853 | 4306 |
| 4307 To check if a function can be called with a specified number of | |
| 4308 arguments, use `function-allows-args'. | |
| 428 | 4309 */ |
| 4310 (function)) | |
| 4311 { | |
| 4312 return function_argcount (function, 1); | |
| 4313 } | |
| 4314 | |
| 4315 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4316 Return the maximum number of arguments a function may be called with. |
| 428 | 4317 The function may be any form that can be passed to `funcall', |
|
4905
755ae5b97edb
Change "special form" to "special operator" in our sources.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4846
diff
changeset
|
4318 any special operator, or any macro. |
| 428 | 4319 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
|
4320 a built-in special operator, nil is returned. |
| 853 | 4321 |
| 4322 To check if a function can be called with a specified number of | |
| 4323 arguments, use `function-allows-args'. | |
| 428 | 4324 */ |
| 4325 (function)) | |
| 4326 { | |
| 4327 return function_argcount (function, 0); | |
| 4328 } | |
| 4329 | |
| 4330 | |
| 4331 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4332 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4333 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
|
4334 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4335 arguments: (FUNCTION &rest ARGS) |
| 428 | 4336 */ |
| 4337 (int nargs, Lisp_Object *args)) | |
| 4338 { | |
| 4339 /* This function can GC */ | |
| 4340 Lisp_Object fun = args[0]; | |
| 4341 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4342 int numargs; | |
| 4343 int funcall_nargs; | |
| 4344 | |
| 4345 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4346 | |
| 4347 if (numargs == 0) | |
| 4348 /* (apply foo 0 1 '()) */ | |
| 4349 return Ffuncall (nargs - 1, args); | |
| 4350 else if (numargs == 1) | |
| 4351 { | |
| 4352 /* (apply foo 0 1 '(2)) */ | |
| 4353 args [nargs - 1] = XCAR (spread_arg); | |
| 4354 return Ffuncall (nargs, args); | |
| 4355 } | |
| 4356 | |
| 4357 /* -1 for function, -1 for spread arg */ | |
| 4358 numargs = nargs - 2 + numargs; | |
| 4359 /* +1 for function */ | |
| 4360 funcall_nargs = 1 + numargs; | |
| 4361 | |
| 4362 if (SYMBOLP (fun)) | |
| 4363 fun = indirect_function (fun, 0); | |
| 4364 | |
| 4365 if (SUBRP (fun)) | |
| 4366 { | |
| 4367 Lisp_Subr *subr = XSUBR (fun); | |
| 4368 int max_args = subr->max_args; | |
| 4369 | |
| 4370 if (numargs < subr->min_args | |
| 4371 || (max_args >= 0 && max_args < numargs)) | |
| 4372 { | |
| 4373 /* Let funcall get the error */ | |
| 4374 } | |
| 4375 else if (max_args > numargs) | |
| 4376 { | |
| 4377 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4378 by explicitly supplying nil's for optional values */ | |
| 4379 funcall_nargs += (max_args - numargs); | |
| 4380 } | |
| 4381 } | |
| 4382 else if (UNBOUNDP (fun)) | |
| 4383 { | |
| 4384 /* Let funcall get the error */ | |
| 4385 fun = args[0]; | |
| 4386 } | |
| 4387 | |
| 4388 { | |
| 4389 REGISTER int i; | |
| 4390 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4391 struct gcpro gcpro1; | |
| 4392 | |
| 4393 GCPRO1 (*funcall_args); | |
| 4394 gcpro1.nvars = funcall_nargs; | |
| 4395 | |
| 4396 /* Copy in the unspread args */ | |
| 4397 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4398 /* Spread the last arg we got. Its first element goes in | |
| 4399 the slot that it used to occupy, hence this value of I. */ | |
| 4400 for (i = nargs - 1; | |
| 4401 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4402 i++, spread_arg = XCDR (spread_arg)) | |
| 4403 { | |
| 4404 funcall_args [i] = XCAR (spread_arg); | |
| 4405 } | |
| 4406 /* Supply nil for optional args (to subrs) */ | |
| 4407 for (; i < funcall_nargs; i++) | |
| 4408 funcall_args[i] = Qnil; | |
| 4409 | |
| 4410 | |
| 4411 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4412 } | |
| 4413 } | |
| 4414 | |
| 4415 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4416 return the result of evaluation. */ | |
| 4417 | |
| 4418 static Lisp_Object | |
| 4419 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4420 { | |
| 4421 /* This function can GC */ | |
| 442 | 4422 Lisp_Object arglist, body, tail; |
| 428 | 4423 int speccount = specpdl_depth(); |
| 4424 REGISTER int i = 0; | |
| 4425 | |
| 4426 tail = XCDR (fun); | |
| 4427 | |
| 4428 if (!CONSP (tail)) | |
| 4429 goto invalid_function; | |
| 4430 | |
| 4431 arglist = XCAR (tail); | |
| 4432 body = XCDR (tail); | |
| 4433 | |
| 4434 { | |
| 4435 int optional = 0, rest = 0; | |
| 4436 | |
| 442 | 4437 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4438 { |
| 4439 if (!SYMBOLP (symbol)) | |
| 4440 goto invalid_function; | |
| 4441 if (EQ (symbol, Qand_rest)) | |
| 4442 rest = 1; | |
| 4443 else if (EQ (symbol, Qand_optional)) | |
| 4444 optional = 1; | |
| 4445 else if (rest) | |
| 4446 { | |
| 4447 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4448 i = nargs; | |
| 4449 } | |
| 4450 else if (i < nargs) | |
| 4451 specbind (symbol, args[i++]); | |
| 4452 else if (!optional) | |
| 4453 goto wrong_number_of_arguments; | |
| 4454 else | |
| 4455 specbind (symbol, Qnil); | |
| 4456 } | |
| 4457 } | |
| 4458 | |
| 4459 if (i < nargs) | |
| 4460 goto wrong_number_of_arguments; | |
| 4461 | |
| 771 | 4462 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4463 |
| 4464 wrong_number_of_arguments: | |
| 436 | 4465 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4466 |
| 4467 invalid_function: | |
| 436 | 4468 return signal_invalid_function_error (fun); |
| 428 | 4469 } |
| 4470 | |
| 4471 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4472 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4473 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4474 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
|
4475 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4476 -- 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
|
4477 -- 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
|
4478 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4479 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4480 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
|
4481 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4482 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
|
4483 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
|
4484 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
|
4485 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
|
4486 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
|
4487 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
|
4488 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
|
4489 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
|
4490 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4491 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
|
4492 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
|
4493 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
|
4494 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
|
4495 #'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
|
4496 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
|
4497 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4498 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4499 (#'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
|
4500 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
|
4501 #'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
|
4502 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
|
4503 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
|
4504 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4505 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
|
4506 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
|
4507 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
|
4508 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
|
4509 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4510 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
|
4511 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
|
4512 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
|
4513 on being printed from within GDB. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4514 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4515 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
|
4516 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
|
4517 #'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
|
4518 #'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
|
4519 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
|
4520 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
|
4521 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
|
4522 *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
|
4523 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4524 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4525 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
|
4526 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4527 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4528 "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
|
4529 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
|
4530 used." |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4531 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4532 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
|
4533 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
|
4534 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
|
4535 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
|
4536 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4537 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4538 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
|
4539 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4540 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4541 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4542 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4543 Elemcount i, allocated_count; |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4544 Lisp_Object mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4546 assert (count != 1); |
|
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 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
|
4549 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4550 /* 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
|
4551 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4552 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4553 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4554 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4555 if (first_desired >= count) |
|
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 /* 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
|
4558 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4559 allocated_count = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4560 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4561 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4562 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4563 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
|
4564 - first_desired); |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4567 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
|
4568 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4569 contents, allocated_count); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4570 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
|
4571 mv = XMULTIPLE_VALUE (mvobj); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4573 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4574 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4575 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4576 mv->contents[0] = first_value; |
|
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 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
|
4579 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 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
|
4581 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4583 return mvobj; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4584 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4585 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4586 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 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
|
4588 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 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
|
4590 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4591 Elemcount allocated_count = mv->allocated_count; |
|
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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4594 (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
|
4595 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4596 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
|
4597 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4598 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4599 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 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
|
4601 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4602 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4603 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4604 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
|
4605 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4606 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
|
4607 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4608 Elemcount allocated_count = mv->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 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4611 (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
|
4612 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4613 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
|
4614 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4615 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4616 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4617 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
|
4618 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4619 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4620 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4621 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
|
4622 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4623 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
|
4624 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4625 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4626 Elemcount count = mv->count, index; |
|
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 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4629 { |
|
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
|
4630 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
|
4631 LISP_OBJECT_UID (obj)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4632 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4633 |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4634 write_fmt_string (printcharfun, |
|
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4635 "#<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
|
4636 " data (", count); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4637 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4638 for (index = 0; index < count;) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4641 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4642 index >= (first_desired + (allocated_count - 1)))) |
|
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 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
|
4645 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4647 else |
|
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 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
|
4650 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4651 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4652 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4653 ++index; |
|
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 if (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4656 { |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4657 write_ascstring (printcharfun, " "); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4658 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 } |
|
5086
47bcef7b0b44
Print multiple values with #<INTERNAL OBJECT (XEmacs bug?) ...>, too
Aidan Kehoe <kehoea@parhasard.net>
parents:
5084
diff
changeset
|
4660 |
|
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
|
4661 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
|
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 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4665 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4666 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 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
|
4668 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
|
4669 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4670 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
|
4671 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4672 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4673 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4674 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4675 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4676 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4677 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4678 static Bytecount |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4679 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
|
4680 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4681 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
|
4682 Lisp_Object, contents, |
|
5127
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
Ben Wing <ben@xemacs.org>
parents:
5126
diff
changeset
|
4683 XMULTIPLE_VALUE (obj)->allocated_count); |
|
4677
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 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
|
4687 { 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
|
4688 { 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
|
4689 { 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
|
4690 { 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
|
4691 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4692 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4693 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4694 |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
4695 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
|
4696 mark_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4697 print_multiple_value, 0, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4698 0, /* No equal method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4699 0, /* No hash method. */ |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4700 multiple_value_description, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4701 size_multiple_value, |
|
623d57b7fbe8
separate regular and disksave finalization, print method fixes.
Ben Wing <ben@xemacs.org>
parents:
5118
diff
changeset
|
4702 struct multiple_value); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4703 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4704 /* 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
|
4705 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
|
4706 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
|
4707 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
|
4708 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4709 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
|
4710 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4711 int result = specpdl_depth(); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4712 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4713 if (!(upper > first)) |
|
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 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
|
4716 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4717 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4718 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4719 if (upper > Vmultiple_values_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4720 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4721 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
|
4722 } |
|
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 /* 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
|
4725 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
|
4726 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
|
4727 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
|
4728 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4729 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
|
4730 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
|
4731 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 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
|
4733 if (0 == first) |
|
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 first = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4736 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4737 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4738 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4739 || first < first_desired_multiple_value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4740 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4741 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
|
4742 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4743 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4744 if (upper > multiple_value_current_limit) |
|
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 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
|
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 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4750 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4753 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
|
4754 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4755 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4756 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4757 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
|
4758 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4759 Lisp_Object apply_args[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4760 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4761 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4762 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4763 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4764 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4765 CHECK_FUNCTION (args[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4766 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4767 /* 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
|
4768 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
|
4769 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4770 for (i = 4; i < nargs; ++i) |
|
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 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4773 if (MULTIPLE_VALUEP (result)) |
|
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 Lisp_Object val; |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4776 Elemcount j, count = XMULTIPLE_VALUE_COUNT (result); |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4777 |
|
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4778 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
|
4779 { |
|
5016
2ade80e8c640
enable more warnings and fix them
Ben Wing <ben@xemacs.org>
parents:
5013
diff
changeset
|
4780 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
|
4781 assert (!UNBOUNDP (val)); |
|
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 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 list_offset = XCDR (list_offset); |
|
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 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4787 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4788 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4789 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4790 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4791 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4792 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4793 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4794 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 apply_args [1] = XCDR (head); |
|
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 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4798 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 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
|
4800 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4801 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4802 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
|
4803 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
|
4804 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4805 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
|
4806 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
|
4807 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
|
4808 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
|
4809 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4810 arguments: (FUNCTION &rest FORMS) |
|
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 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4814 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4816 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4817 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4818 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4819 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4820 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
|
4821 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4822 /* 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
|
4823 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
|
4824 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4825 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4826 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4827 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 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
|
4832 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4833 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4834 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
|
4835 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4837 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4838 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 LIST_LOOP_2 (elt, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4840 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4841 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4843 } |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4846 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
|
4847 } |
|
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 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4850 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
|
4851 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4852 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
|
4853 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 Lisp_Object result = Qnil; |
|
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 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4857 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4858 result = args[3]; |
|
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 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4861 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4862 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4863 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4864 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4865 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4866 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4867 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4868 for (; first < upper && first < count; ++first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4869 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4870 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4871 assert (!UNBOUNDP (val)); |
|
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 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4874 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4875 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 return XCDR (head); |
|
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 else |
|
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 if (first == 0) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 return Fcons (result, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4884 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4885 else |
|
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 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4888 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4889 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4890 } |
|
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 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
|
4893 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4894 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
|
4895 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4896 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
|
4897 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4898 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 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
|
4900 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
|
4901 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
|
4902 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
|
4903 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
|
4904 `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
|
4905 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4906 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
|
4907 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4908 (args)) |
|
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 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4911 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4912 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4913 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4914 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4915 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4916 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4917 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4918 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
|
4919 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4920 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4921 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
|
4922 CHECK_NATNUM (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 first = XINT (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4924 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4925 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4926 gcpro1.nvars = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4927 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4928 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4929 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4930 argv[1] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4931 CHECK_NATNUM (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4932 upper = XINT (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4933 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4935 /* 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
|
4936 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
|
4937 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
|
4938 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4939 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
|
4940 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4941 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4942 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4943 /* 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
|
4944 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
|
4945 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
|
4946 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
|
4947 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
|
4948 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4949 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4950 gcpro1.nvars = 4; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4951 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 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
|
4953 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4954 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4955 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
|
4956 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
|
4957 `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
|
4958 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4959 arguments: (FIRST &rest BODY) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4960 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4961 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4962 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4964 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4965 struct gcpro gcpro1; |
|
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 val = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4968 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4969 GCPRO1 (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4970 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4971 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4973 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4974 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4976 RETURN_UNGCPRO (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4977 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4978 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4979 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4980 Return all ARGS as multiple values. |
|
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 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4983 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4984 (int nargs, Lisp_Object *args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4986 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4987 int counting = 1; |
|
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 /* 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
|
4990 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
|
4991 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4992 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4993 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4995 /* 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
|
4996 #'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
|
4997 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
|
4998 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4999 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
|
5000 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5001 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5002 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5003 for (; counting < nargs; ++counting) |
|
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 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5006 counting < multiple_value_current_limit) |
|
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 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
|
5009 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5010 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5011 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5012 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5013 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5014 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5015 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
|
5016 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
|
5017 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5018 (list)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5019 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5020 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5021 int counting = 1, listcount; |
|
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 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5024 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5025 /* 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
|
5026 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
|
5027 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5028 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5029 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5030 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5031 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
|
5032 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5033 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5034 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5035 list = Fcdr_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5036 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5037 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5038 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5039 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5040 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5041 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5042 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5043 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5044 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5045 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5046 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5047 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5048 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5049 return result; |
|
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 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5052 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5053 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
|
5054 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5055 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5056 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5057 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5058 argv[1] = second; |
|
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 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5061 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5062 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5063 |
| 428 | 5064 /************************************************************************/ |
| 5065 /* Run hook variables in various ways. */ | |
| 5066 /************************************************************************/ | |
| 5067 | |
| 5068 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5069 Run each hook in HOOKS. Major mode functions use this. | |
| 5070 Each argument should be a symbol, a hook variable. | |
| 5071 These symbols are processed in the order specified. | |
| 5072 If a hook symbol has a non-nil value, that value may be a function | |
| 5073 or a list of functions to be called to run the hook. | |
| 5074 If the value is a function, it is called with no arguments. | |
| 5075 If it is a list, the elements are called, in order, with no arguments. | |
| 5076 | |
| 5077 To make a hook variable buffer-local, use `make-local-hook', | |
| 5078 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5079 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5080 arguments: (FIRST &rest REST) |
| 428 | 5081 */ |
| 5082 (int nargs, Lisp_Object *args)) | |
| 5083 { | |
| 5084 REGISTER int i; | |
| 5085 | |
| 5086 for (i = 0; i < nargs; i++) | |
| 5087 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5088 | |
| 5089 return Qnil; | |
| 5090 } | |
| 5091 | |
| 5092 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5093 Run HOOK with the specified arguments ARGS. | |
| 5094 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5095 value, that value may be a function or a list of functions to be | |
| 5096 called to run the hook. If the value is a function, it is called with | |
| 5097 the given arguments and its return value is returned. If it is a list | |
| 5098 of functions, those functions are called, in order, | |
| 5099 with the given arguments ARGS. | |
| 444 | 5100 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5101 as that may change. |
| 5102 | |
| 5103 To make a hook variable buffer-local, use `make-local-hook', | |
| 5104 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5105 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5106 arguments: (HOOK &rest ARGS) |
| 428 | 5107 */ |
| 5108 (int nargs, Lisp_Object *args)) | |
| 5109 { | |
| 5110 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5111 } | |
| 5112 | |
| 5113 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5114 Run HOOK with the specified arguments ARGS. | |
| 5115 HOOK should be a symbol, a hook variable. Its value should | |
| 5116 be a list of functions. We call those functions, one by one, | |
| 5117 passing arguments ARGS to each of them, until one of them | |
| 5118 returns a non-nil value. Then we return that value. | |
| 5119 If all the functions return nil, we return nil. | |
| 5120 | |
| 5121 To make a hook variable buffer-local, use `make-local-hook', | |
| 5122 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5123 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5124 arguments: (HOOK &rest ARGS) |
| 428 | 5125 */ |
| 5126 (int nargs, Lisp_Object *args)) | |
| 5127 { | |
| 5128 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5129 } | |
| 5130 | |
| 5131 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5132 Run HOOK with the specified arguments ARGS. | |
| 5133 HOOK should be a symbol, a hook variable. Its value should | |
| 5134 be a list of functions. We call those functions, one by one, | |
| 5135 passing arguments ARGS to each of them, until one of them | |
| 5136 returns nil. Then we return nil. | |
| 5137 If all the functions return non-nil, we return non-nil. | |
| 5138 | |
| 5139 To make a hook variable buffer-local, use `make-local-hook', | |
| 5140 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5141 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5142 arguments: (HOOK &rest ARGS) |
| 428 | 5143 */ |
| 5144 (int nargs, Lisp_Object *args)) | |
| 5145 { | |
| 5146 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5147 } | |
| 5148 | |
| 5149 /* ARGS[0] should be a hook symbol. | |
| 5150 Call each of the functions in the hook value, passing each of them | |
| 5151 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5152 COND specifies a condition to test after each call | |
| 5153 to decide whether to stop. | |
| 5154 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5155 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5156 | |
| 5157 Lisp_Object | |
| 5158 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5159 enum run_hooks_condition cond) | |
| 5160 { | |
| 5161 Lisp_Object sym, val, ret; | |
| 5162 | |
| 5163 if (!initialized || preparing_for_armageddon) | |
| 5164 /* We need to bail out of here pronto. */ | |
| 5165 return Qnil; | |
| 5166 | |
| 3092 | 5167 #ifndef NEW_GC |
| 428 | 5168 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5169 will also be true unless something is really hosed. */ | |
| 5170 assert (!gc_in_progress); | |
| 3092 | 5171 #endif /* not NEW_GC */ |
| 428 | 5172 |
| 5173 sym = args[0]; | |
| 771 | 5174 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5175 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5176 | |
| 5177 if (UNBOUNDP (val) || NILP (val)) | |
| 5178 return ret; | |
| 5179 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5180 { | |
| 5181 args[0] = val; | |
| 5182 return Ffuncall (nargs, args); | |
| 5183 } | |
| 5184 else | |
| 5185 { | |
| 5186 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5187 Lisp_Object globals = Qnil; | |
| 5188 GCPRO3 (sym, val, globals); | |
| 5189 | |
| 5190 for (; | |
| 5191 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5192 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5193 : !NILP (ret))); | |
| 5194 val = XCDR (val)) | |
| 5195 { | |
| 5196 if (EQ (XCAR (val), Qt)) | |
| 5197 { | |
| 5198 /* t indicates this hook has a local binding; | |
| 5199 it means to run the global binding too. */ | |
| 5200 globals = Fdefault_value (sym); | |
| 5201 | |
| 5202 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5203 ! NILP (globals)) | |
| 5204 { | |
| 5205 args[0] = globals; | |
| 5206 ret = Ffuncall (nargs, args); | |
| 5207 } | |
| 5208 else | |
| 5209 { | |
| 5210 for (; | |
| 5211 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5212 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5213 ? NILP (ret) | |
| 5214 : !NILP (ret))); | |
| 5215 globals = XCDR (globals)) | |
| 5216 { | |
| 5217 args[0] = XCAR (globals); | |
| 5218 /* In a global value, t should not occur. If it does, we | |
| 5219 must ignore it to avoid an endless loop. */ | |
| 5220 if (!EQ (args[0], Qt)) | |
| 5221 ret = Ffuncall (nargs, args); | |
| 5222 } | |
| 5223 } | |
| 5224 } | |
| 5225 else | |
| 5226 { | |
| 5227 args[0] = XCAR (val); | |
| 5228 ret = Ffuncall (nargs, args); | |
| 5229 } | |
| 5230 } | |
| 5231 | |
| 5232 UNGCPRO; | |
| 5233 return ret; | |
| 5234 } | |
| 5235 } | |
| 5236 | |
| 5237 Lisp_Object | |
| 5238 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5239 enum run_hooks_condition cond) | |
| 5240 { | |
| 5241 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5242 } | |
| 5243 | |
| 5244 #if 0 | |
| 5245 | |
| 853 | 5246 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5247 |
| 5248 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5249 present value of that symbol. | |
| 5250 Call each element of FUNLIST, | |
| 5251 passing each of them the rest of ARGS. | |
| 5252 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5253 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5254 | |
| 5255 Lisp_Object | |
| 5256 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5257 { | |
| 853 | 5258 omitted; |
| 428 | 5259 } |
| 5260 | |
| 5261 #endif /* 0 */ | |
| 5262 | |
| 5263 void | |
| 5264 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5265 { | |
| 5266 /* This function can GC */ | |
| 5267 struct gcpro gcpro1; | |
| 5268 int i; | |
| 5269 va_list vargs; | |
| 5270 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5271 | |
| 5272 va_start (vargs, nargs); | |
| 5273 funcall_args[0] = hook_var; | |
| 5274 for (i = 0; i < nargs; i++) | |
| 5275 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5276 va_end (vargs); | |
| 5277 | |
| 5278 GCPRO1 (*funcall_args); | |
| 5279 gcpro1.nvars = nargs + 1; | |
| 5280 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5281 UNGCPRO; | |
| 5282 } | |
| 5283 | |
| 5284 void | |
| 5285 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5286 int nargs, ...) | |
| 5287 { | |
| 5288 /* This function can GC */ | |
| 5289 struct gcpro gcpro1; | |
| 5290 int i; | |
| 5291 va_list vargs; | |
| 5292 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5293 | |
| 5294 va_start (vargs, nargs); | |
| 5295 funcall_args[0] = hook_var; | |
| 5296 for (i = 0; i < nargs; i++) | |
| 5297 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5298 va_end (vargs); | |
| 5299 | |
| 5300 GCPRO1 (*funcall_args); | |
| 5301 gcpro1.nvars = nargs + 1; | |
| 5302 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5303 RUN_HOOKS_TO_COMPLETION); | |
| 5304 UNGCPRO; | |
| 5305 } | |
| 5306 | |
| 5307 Lisp_Object | |
| 5308 run_hook (Lisp_Object hook) | |
| 5309 { | |
| 853 | 5310 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5311 } |
| 5312 | |
| 5313 | |
| 5314 /************************************************************************/ | |
| 5315 /* Front-ends to eval, funcall, apply */ | |
| 5316 /************************************************************************/ | |
| 5317 | |
| 5318 /* Apply fn to arg */ | |
| 5319 Lisp_Object | |
| 5320 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5321 { | |
| 5322 /* This function can GC */ | |
| 5323 struct gcpro gcpro1; | |
| 5324 Lisp_Object args[2]; | |
| 5325 | |
| 5326 if (NILP (arg)) | |
| 5327 return Ffuncall (1, &fn); | |
| 5328 GCPRO1 (args[0]); | |
| 5329 gcpro1.nvars = 2; | |
| 5330 args[0] = fn; | |
| 5331 args[1] = arg; | |
| 5332 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5333 } | |
| 5334 | |
| 5335 /* Call function fn on no arguments */ | |
| 5336 Lisp_Object | |
| 5337 call0 (Lisp_Object fn) | |
| 5338 { | |
| 5339 /* This function can GC */ | |
| 5340 struct gcpro gcpro1; | |
| 5341 | |
| 5342 GCPRO1 (fn); | |
| 5343 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5344 } | |
| 5345 | |
| 5346 /* Call function fn with argument arg0 */ | |
| 5347 Lisp_Object | |
| 5348 call1 (Lisp_Object fn, | |
| 5349 Lisp_Object arg0) | |
| 5350 { | |
| 5351 /* This function can GC */ | |
| 5352 struct gcpro gcpro1; | |
| 5353 Lisp_Object args[2]; | |
| 5354 args[0] = fn; | |
| 5355 args[1] = arg0; | |
| 5356 GCPRO1 (args[0]); | |
| 5357 gcpro1.nvars = 2; | |
| 5358 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5359 } | |
| 5360 | |
| 5361 /* Call function fn with arguments arg0, arg1 */ | |
| 5362 Lisp_Object | |
| 5363 call2 (Lisp_Object fn, | |
| 5364 Lisp_Object arg0, Lisp_Object arg1) | |
| 5365 { | |
| 5366 /* This function can GC */ | |
| 5367 struct gcpro gcpro1; | |
| 5368 Lisp_Object args[3]; | |
| 5369 args[0] = fn; | |
| 5370 args[1] = arg0; | |
| 5371 args[2] = arg1; | |
| 5372 GCPRO1 (args[0]); | |
| 5373 gcpro1.nvars = 3; | |
| 5374 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5375 } | |
| 5376 | |
| 5377 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5378 Lisp_Object | |
| 5379 call3 (Lisp_Object fn, | |
| 5380 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5381 { | |
| 5382 /* This function can GC */ | |
| 5383 struct gcpro gcpro1; | |
| 5384 Lisp_Object args[4]; | |
| 5385 args[0] = fn; | |
| 5386 args[1] = arg0; | |
| 5387 args[2] = arg1; | |
| 5388 args[3] = arg2; | |
| 5389 GCPRO1 (args[0]); | |
| 5390 gcpro1.nvars = 4; | |
| 5391 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5392 } | |
| 5393 | |
| 5394 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5395 Lisp_Object | |
| 5396 call4 (Lisp_Object fn, | |
| 5397 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5398 Lisp_Object arg3) | |
| 5399 { | |
| 5400 /* This function can GC */ | |
| 5401 struct gcpro gcpro1; | |
| 5402 Lisp_Object args[5]; | |
| 5403 args[0] = fn; | |
| 5404 args[1] = arg0; | |
| 5405 args[2] = arg1; | |
| 5406 args[3] = arg2; | |
| 5407 args[4] = arg3; | |
| 5408 GCPRO1 (args[0]); | |
| 5409 gcpro1.nvars = 5; | |
| 5410 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5411 } | |
| 5412 | |
| 5413 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5414 Lisp_Object | |
| 5415 call5 (Lisp_Object fn, | |
| 5416 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5417 Lisp_Object arg3, Lisp_Object arg4) | |
| 5418 { | |
| 5419 /* This function can GC */ | |
| 5420 struct gcpro gcpro1; | |
| 5421 Lisp_Object args[6]; | |
| 5422 args[0] = fn; | |
| 5423 args[1] = arg0; | |
| 5424 args[2] = arg1; | |
| 5425 args[3] = arg2; | |
| 5426 args[4] = arg3; | |
| 5427 args[5] = arg4; | |
| 5428 GCPRO1 (args[0]); | |
| 5429 gcpro1.nvars = 6; | |
| 5430 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5431 } | |
| 5432 | |
| 5433 Lisp_Object | |
| 5434 call6 (Lisp_Object fn, | |
| 5435 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5436 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5437 { | |
| 5438 /* This function can GC */ | |
| 5439 struct gcpro gcpro1; | |
| 5440 Lisp_Object args[7]; | |
| 5441 args[0] = fn; | |
| 5442 args[1] = arg0; | |
| 5443 args[2] = arg1; | |
| 5444 args[3] = arg2; | |
| 5445 args[4] = arg3; | |
| 5446 args[5] = arg4; | |
| 5447 args[6] = arg5; | |
| 5448 GCPRO1 (args[0]); | |
| 5449 gcpro1.nvars = 7; | |
| 5450 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5451 } | |
| 5452 | |
| 5453 Lisp_Object | |
| 5454 call7 (Lisp_Object fn, | |
| 5455 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5456 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5457 Lisp_Object arg6) | |
| 5458 { | |
| 5459 /* This function can GC */ | |
| 5460 struct gcpro gcpro1; | |
| 5461 Lisp_Object args[8]; | |
| 5462 args[0] = fn; | |
| 5463 args[1] = arg0; | |
| 5464 args[2] = arg1; | |
| 5465 args[3] = arg2; | |
| 5466 args[4] = arg3; | |
| 5467 args[5] = arg4; | |
| 5468 args[6] = arg5; | |
| 5469 args[7] = arg6; | |
| 5470 GCPRO1 (args[0]); | |
| 5471 gcpro1.nvars = 8; | |
| 5472 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5473 } | |
| 5474 | |
| 5475 Lisp_Object | |
| 5476 call8 (Lisp_Object fn, | |
| 5477 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5478 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5479 Lisp_Object arg6, Lisp_Object arg7) | |
| 5480 { | |
| 5481 /* This function can GC */ | |
| 5482 struct gcpro gcpro1; | |
| 5483 Lisp_Object args[9]; | |
| 5484 args[0] = fn; | |
| 5485 args[1] = arg0; | |
| 5486 args[2] = arg1; | |
| 5487 args[3] = arg2; | |
| 5488 args[4] = arg3; | |
| 5489 args[5] = arg4; | |
| 5490 args[6] = arg5; | |
| 5491 args[7] = arg6; | |
| 5492 args[8] = arg7; | |
| 5493 GCPRO1 (args[0]); | |
| 5494 gcpro1.nvars = 9; | |
| 5495 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5496 } | |
| 5497 | |
| 5498 Lisp_Object | |
| 5499 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5500 { | |
| 5501 if (current_buffer == buf) | |
| 5502 return call0 (fn); | |
| 5503 else | |
| 5504 { | |
| 5505 Lisp_Object val; | |
| 5506 int speccount = specpdl_depth(); | |
| 5507 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5508 set_buffer_internal (buf); | |
| 5509 val = call0 (fn); | |
| 771 | 5510 unbind_to (speccount); |
| 428 | 5511 return val; |
| 5512 } | |
| 5513 } | |
| 5514 | |
| 5515 Lisp_Object | |
| 5516 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5517 Lisp_Object arg0) | |
| 5518 { | |
| 5519 if (current_buffer == buf) | |
| 5520 return call1 (fn, arg0); | |
| 5521 else | |
| 5522 { | |
| 5523 Lisp_Object val; | |
| 5524 int speccount = specpdl_depth(); | |
| 5525 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5526 set_buffer_internal (buf); | |
| 5527 val = call1 (fn, arg0); | |
| 771 | 5528 unbind_to (speccount); |
| 428 | 5529 return val; |
| 5530 } | |
| 5531 } | |
| 5532 | |
| 5533 Lisp_Object | |
| 5534 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5535 Lisp_Object arg0, Lisp_Object arg1) | |
| 5536 { | |
| 5537 if (current_buffer == buf) | |
| 5538 return call2 (fn, arg0, arg1); | |
| 5539 else | |
| 5540 { | |
| 5541 Lisp_Object val; | |
| 5542 int speccount = specpdl_depth(); | |
| 5543 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5544 set_buffer_internal (buf); | |
| 5545 val = call2 (fn, arg0, arg1); | |
| 771 | 5546 unbind_to (speccount); |
| 428 | 5547 return val; |
| 5548 } | |
| 5549 } | |
| 5550 | |
| 5551 Lisp_Object | |
| 5552 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5553 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5554 { | |
| 5555 if (current_buffer == buf) | |
| 5556 return call3 (fn, arg0, arg1, arg2); | |
| 5557 else | |
| 5558 { | |
| 5559 Lisp_Object val; | |
| 5560 int speccount = specpdl_depth(); | |
| 5561 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5562 set_buffer_internal (buf); | |
| 5563 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5564 unbind_to (speccount); |
| 428 | 5565 return val; |
| 5566 } | |
| 5567 } | |
| 5568 | |
| 5569 Lisp_Object | |
| 5570 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5571 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5572 Lisp_Object arg3) | |
| 5573 { | |
| 5574 if (current_buffer == buf) | |
| 5575 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5576 else | |
| 5577 { | |
| 5578 Lisp_Object val; | |
| 5579 int speccount = specpdl_depth(); | |
| 5580 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5581 set_buffer_internal (buf); | |
| 5582 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5583 unbind_to (speccount); |
| 428 | 5584 return val; |
| 5585 } | |
| 5586 } | |
| 5587 | |
| 5588 Lisp_Object | |
| 5589 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5590 { | |
| 5591 if (current_buffer == buf) | |
| 5592 return Feval (form); | |
| 5593 else | |
| 5594 { | |
| 5595 Lisp_Object val; | |
| 5596 int speccount = specpdl_depth(); | |
| 5597 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5598 set_buffer_internal (buf); | |
| 5599 val = Feval (form); | |
| 771 | 5600 unbind_to (speccount); |
| 428 | 5601 return val; |
| 5602 } | |
| 5603 } | |
| 5604 | |
| 5605 | |
| 5606 /************************************************************************/ | |
| 5607 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5608 /************************************************************************/ | |
| 5609 | |
| 853 | 5610 int |
| 5611 get_inhibit_flags (void) | |
| 5612 { | |
| 5613 return inhibit_flags; | |
| 5614 } | |
| 5615 | |
| 5616 void | |
| 2286 | 5617 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5618 { |
| 5619 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5620 { | |
| 5621 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5622 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5623 invalid_change | |
| 5624 ("Modification of this buffer not currently permitted", obj); | |
| 5625 } | |
| 5626 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5627 { | |
| 5628 if (what == OPERATION_DELETE_OBJECT | |
| 5629 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5630 || CONSOLEP (obj)) | |
| 5631 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5632 invalid_change | |
| 5633 ("Deletion of this object not currently permitted", obj); | |
| 5634 } | |
| 5635 } | |
| 5636 | |
| 5637 void | |
| 5638 note_object_created (Lisp_Object obj) | |
| 5639 { | |
| 5640 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5641 { | |
| 5642 if (BUFFERP (obj)) | |
| 5643 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5644 } | |
| 5645 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5646 { | |
| 5647 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5648 || CONSOLEP (obj)) | |
| 5649 Vdeletable_permanent_display_objects = | |
| 5650 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5651 } | |
| 5652 } | |
| 5653 | |
| 5654 void | |
| 5655 note_object_deleted (Lisp_Object obj) | |
| 5656 { | |
| 5657 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5658 { | |
| 5659 if (BUFFERP (obj)) | |
| 5660 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5661 } | |
| 5662 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5663 { | |
| 5664 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5665 || CONSOLEP (obj)) | |
| 5666 Vdeletable_permanent_display_objects = | |
| 5667 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5668 } | |
| 5669 } | |
| 5670 | |
| 5671 struct call_trapping_problems | |
| 5672 { | |
| 5673 Lisp_Object catchtag; | |
| 5674 Lisp_Object error_conditions; | |
| 5675 Lisp_Object data; | |
| 5676 Lisp_Object backtrace; | |
| 5677 Lisp_Object warning_class; | |
| 5678 | |
| 867 | 5679 const CIbyte *warning_string; |
| 853 | 5680 Lisp_Object (*fun) (void *); |
| 5681 void *arg; | |
| 5682 }; | |
| 428 | 5683 |
| 2532 | 5684 static Lisp_Object |
| 5685 maybe_get_trapping_problems_backtrace (void) | |
| 5686 { | |
| 5687 Lisp_Object backtrace; | |
| 853 | 5688 |
| 1123 | 5689 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5690 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5691 { |
| 1333 | 5692 struct gcpro gcpro1; |
| 5693 Lisp_Object lstream = Qnil; | |
| 5694 int speccount = specpdl_depth (); | |
| 5695 | |
| 853 | 5696 /* We're no longer protected against errors or quit here, so at |
| 5697 least let's temporarily inhibit quit. We definitely do not | |
| 5698 want to inhibit quit during the calling of the function | |
| 5699 itself!!!!!!!!!!! */ | |
| 5700 | |
| 5701 specbind (Qinhibit_quit, Qt); | |
| 5702 | |
| 5703 GCPRO1 (lstream); | |
| 5704 lstream = make_resizing_buffer_output_stream (); | |
| 5705 Fbacktrace (lstream, Qt); | |
| 5706 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5707 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5708 Lstream_delete (XLSTREAM (lstream)); |
| 5709 UNGCPRO; | |
| 5710 | |
| 5711 unbind_to (speccount); | |
| 428 | 5712 } |
| 853 | 5713 else |
| 2532 | 5714 backtrace = Qnil; |
| 5715 | |
| 5716 return backtrace; | |
| 5717 } | |
| 5718 | |
| 5719 static DECLARE_DOESNT_RETURN_TYPE | |
| 5720 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5721 | |
| 5722 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5723 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5724 Lisp_Object opaque) | |
| 5725 { | |
| 5726 struct call_trapping_problems *p = | |
| 5727 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5728 | |
| 5729 if (!EQ (error_conditions, Qquit)) | |
| 5730 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5731 else | |
| 853 | 5732 p->backtrace = Qnil; |
| 5733 p->error_conditions = error_conditions; | |
| 5734 p->data = data; | |
| 5735 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5736 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5737 RETURN_NOT_REACHED (Qnil); |
| 853 | 5738 } |
| 5739 | |
| 5740 static Lisp_Object | |
| 5741 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5742 { | |
| 5743 struct call_trapping_problems *p = | |
| 5744 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5745 | |
| 5746 return (p->fun) (p->arg); | |
| 428 | 5747 } |
| 5748 | |
| 5749 static Lisp_Object | |
| 853 | 5750 call_trapping_problems_1 (Lisp_Object opaque) |
| 5751 { | |
| 5752 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5753 call_trapping_problems_2, opaque); | |
| 5754 } | |
| 5755 | |
| 1333 | 5756 static void |
| 5757 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5758 const CIbyte *warning_string, | |
| 5759 struct call_trapping_problems_result *p) | |
| 5760 { | |
| 5761 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5762 { | |
| 5763 int depth = specpdl_depth (); | |
| 5764 | |
| 5765 /* We're no longer protected against errors or quit here, so at | |
| 5766 least let's temporarily inhibit quit. */ | |
| 5767 specbind (Qinhibit_quit, Qt); | |
| 5768 | |
| 5769 if (p->caught_throw) | |
| 5770 { | |
| 5771 Lisp_Object errstr = | |
| 5772 emacs_sprintf_string_lisp | |
| 2532 | 5773 ("%s: Attempt to throw outside of function:" |
| 5774 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5775 Qnil, 4, |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5776 build_msg_cistring (warning_string ? warning_string : "error"), |
| 2532 | 5777 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5778 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5779 } | |
| 2421 | 5780 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5781 { |
| 5782 Lisp_Object errstr; | |
| 5783 /* #### This should call | |
| 5784 (with-output-to-string (display-error (cons error_conditions | |
| 5785 data)) | |
| 5786 but that stuff is all in Lisp currently. */ | |
| 5787 errstr = | |
| 5788 emacs_sprintf_string_lisp | |
| 5789 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5790 Qnil, 4, | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
5791 build_msg_cistring (warning_string ? warning_string : "error"), |
| 1333 | 5792 p->error_conditions, p->data, p->backtrace); |
| 5793 | |
| 5794 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5795 errstr); | |
| 5796 } | |
| 5797 | |
| 5798 unbind_to (depth); | |
| 5799 } | |
| 5800 } | |
| 5801 | |
| 1318 | 5802 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5803 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5804 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5805 use call_trapping_problems() for that. Turn the flags off with | |
| 5806 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5807 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5808 various other flags). */ | |
| 5809 | |
| 5810 int | |
| 5811 set_trapping_problems_flags (int flags) | |
| 5812 { | |
| 5813 int new_inhibit_flags; | |
| 5814 | |
| 5815 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5816 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5817 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5818 | INHIBIT_ENTERING_DEBUGGER | |
| 5819 | INHIBIT_WARNING_ISSUE | |
| 5820 | INHIBIT_GC; | |
| 5821 | |
| 5822 new_inhibit_flags = inhibit_flags | flags; | |
| 5823 if (new_inhibit_flags != inhibit_flags) | |
| 5824 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5825 | |
| 5826 if (flags & INHIBIT_QUIT) | |
| 5827 specbind (Qinhibit_quit, Qt); | |
| 5828 | |
| 5829 if (flags & UNINHIBIT_QUIT) | |
| 5830 begin_do_check_for_quit (); | |
| 5831 | |
| 5832 if (flags & INHIBIT_GC) | |
| 5833 begin_gc_forbidden (); | |
| 5834 | |
| 5835 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5836 inner one creates some buffers/etc., should the outer one be able | |
| 5837 to delete them? I think so, but it means we need to combine rather | |
| 5838 than just reset the value. */ | |
| 5839 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5840 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5841 | |
| 5842 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5843 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5844 | |
| 5845 return flags; | |
| 5846 } | |
| 5847 | |
| 853 | 5848 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5849 can be trapped or inhibited, according to FLAGS. | |
| 5850 | |
| 5851 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5852 the error is caught and a warning is issued, specifying the | |
| 5853 specific error that occurred and a backtrace. In that case, | |
| 5854 WARNING_STRING should be given, and will be printed at the | |
| 5855 beginning of the error to indicate where the error occurred. | |
| 5856 | |
| 5857 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5858 `throw' out of the function being called are trapped, and a warning | |
| 5859 issued. (Again, WARNING_STRING should be given.) | |
| 5860 | |
| 2367 | 5861 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5862 this applies to recursive invocations of call_trapping_problems, too. |
| 5863 | |
| 1333 | 5864 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5865 but values useful for generating a warning are still computed (in | |
| 5866 particular, the backtrace), so that the calling function can issue | |
| 5867 a warning. | |
| 5868 | |
| 853 | 5869 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5870 issued, but at level `debug', which normally is below the minimum | |
| 5871 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5872 be ignored entirely. The user can change this variable, however, | |
| 5873 to see the warnings.) | |
| 5874 | |
| 5875 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5876 given, you are *guaranteed* that there will be no non-local exits | |
| 5877 out of this function. | |
| 5878 | |
| 5879 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5880 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5881 automatically caught as well, and treated as an error; you can | |
| 5882 check for this using EQ (problems->error_conditions, Qquit). | |
| 5883 | |
| 5884 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5885 turned on. (It will abort the code being called, but will still be | |
| 5886 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5887 given.) This is useful when QUIT checking has been turned off by a | |
| 5888 higher-level caller. | |
| 5889 | |
| 5890 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5891 This is useful for Lisp called within redisplay, for example. |
| 853 | 5892 |
| 5893 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5894 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5895 or consoles that were already in existence at the time this function | |
| 5896 was called. (However, it's perfectly legal for code to create a new | |
| 5897 buffer and then delete it.) | |
| 5898 | |
| 5899 #### It might be useful to have a flag that inhibits deletion of a | |
| 5900 specific permanent display object and everything it's attached to | |
| 5901 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5902 attached to. | |
| 5903 | |
| 5904 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5905 code is not allowed to modify the text of any buffers that were | |
| 5906 already in existence at the time this function was called. | |
| 5907 (However, it's perfectly legal for code to create a new buffer and | |
| 5908 then modify its text.) | |
| 5909 | |
| 5910 [These last two flags are implemented using global variables | |
| 5911 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5912 which keep track of a list of all buffers or permanent display | |
| 5913 objects created since the last time one of these flags was set. | |
| 5914 The code that deletes buffers, etc. and modifies buffers checks | |
| 5915 | |
| 5916 (1) if the corresponding flag is set (through the global variable | |
| 5917 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5918 | |
| 5919 (2) if the object to be modified or deleted is not in the | |
| 5920 appropriate list. | |
| 5921 | |
| 5922 If so, it signals an error. | |
| 5923 | |
| 5924 Recursive calls to call_trapping_problems() are allowed. In | |
| 5925 the case of the two flags mentioned above, the current values | |
| 5926 of the global variables are stored in an unwind-protect, and | |
| 5927 they're reset to nil.] | |
| 5928 | |
| 5929 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5930 be entered if an error occurs inside the Lisp code being called, | |
| 5931 even when the user has requested an error. In such case, a warning | |
| 5932 is issued stating that access to the debugger is denied, unless | |
| 5933 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5934 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5935 in such cases either the display is in an inconsistent state or | |
| 5936 doing window operations is explicitly forbidden by the OS, and the | |
| 5937 debugger would causes visual changes on the screen and might create | |
| 5938 another frame. | |
| 5939 | |
| 5940 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5941 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5942 specifiers relating to display, other variables relating to | |
| 5943 display, splitting, deleting, or resizing windows or frames, | |
| 5944 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5945 allowed. This is for things called absolutely in the middle of | |
| 5946 redisplay, which expects things to be *exactly* the same after the | |
| 5947 call as before. This isn't completely implemented and needs to be | |
| 5948 thought out some more to determine exactly what its semantics are. | |
| 5949 For the moment, turning on this flag also turns on | |
| 5950 | |
| 5951 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5952 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5953 INHIBIT_ENTERING_DEBUGGER | |
| 5954 INHIBIT_WARNING_ISSUE | |
| 5955 INHIBIT_GC | |
| 5956 | |
| 5957 #### The following five flags are defined, but unimplemented: | |
| 5958 | |
| 5959 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5960 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5961 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5962 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5963 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5964 | |
| 5965 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5966 call_with_suspended_errors() was invoked. This exists only for | |
| 5967 debugging purposes -- often we want to break when a signal happens, | |
| 5968 but ignore signals from call_with_suspended_errors(), because they | |
| 5969 occur often and for legitimate reasons. | |
| 5970 | |
| 5971 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5972 which exact information about any occurring problems (either an | |
| 5973 error or an attempted throw past this boundary). | |
| 5974 | |
| 5975 If a problem occurred and aborted operation (error, quit, or | |
| 5976 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5977 from the call to (*fun) (arg) is returned. */ | |
| 5978 | |
| 5979 Lisp_Object | |
| 5980 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5981 const CIbyte *warning_string, |
| 853 | 5982 int flags, |
| 5983 struct call_trapping_problems_result *problem, | |
| 5984 Lisp_Object (*fun) (void *), | |
| 5985 void *arg) | |
| 5986 { | |
| 1318 | 5987 int speccount = specpdl_depth (); |
| 853 | 5988 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 5989 struct call_trapping_problems package; | |
| 1333 | 5990 struct call_trapping_problems_result real_problem; |
| 2532 | 5991 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 5992 int thrown = 0; |
| 5993 | |
| 5994 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 5995 assert (!NILP (warning_class)); | |
| 5996 | |
| 5997 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 5998 | |
| 5999 package.warning_class = warning_class; | |
| 6000 package.warning_string = warning_string; | |
| 6001 package.fun = fun; | |
| 6002 package.arg = arg; | |
| 6003 package.catchtag = | |
| 6004 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 6005 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 6006 Qnil; | |
| 6007 package.error_conditions = Qnil; | |
| 6008 package.data = Qnil; | |
| 6009 package.backtrace = Qnil; | |
| 6010 | |
| 1318 | 6011 flags = set_trapping_problems_flags (flags); |
| 853 | 6012 |
| 6013 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 6014 opaque = make_opaque_ptr (&package); | |
| 6015 else | |
| 6016 opaque = Qnil; | |
| 6017 | |
| 6018 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 6019 package.backtrace, opaque); | |
| 6020 | |
| 6021 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 6022 /* We need a catch so that our condition-handler can throw back here | |
| 6023 after printing the warning. (We print the warning in the stack | |
| 6024 context of the error, so we can get a backtrace.) */ | |
| 6025 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 6026 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6027 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 6028 /* We skip over the first wrapper, which traps errors. */ | |
| 6029 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 6030 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 6031 else |
| 6032 /* Nothing special. */ | |
| 6033 tem = (fun) (arg); | |
| 6034 | |
| 1333 | 6035 if (!problem) |
| 6036 problem = &real_problem; | |
| 6037 | |
| 6038 if (!thrown) | |
| 853 | 6039 { |
| 1333 | 6040 problem->caught_error = 0; |
| 6041 problem->caught_throw = 0; | |
| 6042 problem->error_conditions = Qnil; | |
| 6043 problem->data = Qnil; | |
| 6044 problem->backtrace = Qnil; | |
| 6045 problem->thrown_tag = Qnil; | |
| 6046 problem->thrown_value = Qnil; | |
| 853 | 6047 } |
| 1333 | 6048 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 6049 { |
| 1333 | 6050 problem->caught_error = 1; |
| 6051 problem->caught_throw = 0; | |
| 6052 problem->error_conditions = package.error_conditions; | |
| 6053 problem->data = package.data; | |
| 6054 problem->backtrace = package.backtrace; | |
| 6055 problem->thrown_tag = Qnil; | |
| 6056 problem->thrown_value = Qnil; | |
| 853 | 6057 } |
| 1333 | 6058 else |
| 6059 { | |
| 6060 problem->caught_error = 0; | |
| 6061 problem->caught_throw = 1; | |
| 6062 problem->error_conditions = Qnil; | |
| 6063 problem->data = Qnil; | |
| 2532 | 6064 problem->backtrace = thrown_backtrace; |
| 1333 | 6065 problem->thrown_tag = thrown_tag; |
| 6066 problem->thrown_value = tem; | |
| 6067 } | |
| 6068 | |
| 6069 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6070 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6071 problem); | |
| 853 | 6072 |
| 6073 if (!NILP (package.catchtag) && | |
| 6074 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6075 free_opaque_ptr (package.catchtag); | |
| 6076 | |
| 6077 if (!NILP (opaque)) | |
| 6078 free_opaque_ptr (opaque); | |
| 6079 | |
| 6080 unbind_to (speccount); | |
| 6081 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6082 } | |
| 6083 | |
| 6084 struct va_call_trapping_problems | |
| 6085 { | |
| 6086 lisp_fn_t fun; | |
| 6087 int nargs; | |
| 6088 Lisp_Object *args; | |
| 6089 }; | |
| 6090 | |
| 6091 static Lisp_Object | |
| 6092 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6093 { | |
| 6094 struct va_call_trapping_problems *ai_no_corrida = | |
| 6095 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6096 Lisp_Object pegar_no_bumbum; | |
| 6097 | |
| 6098 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6099 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6100 return pegar_no_bumbum; | |
| 6101 } | |
| 6102 | |
| 6103 /* #### document me. */ | |
| 6104 | |
| 6105 Lisp_Object | |
| 6106 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6107 const CIbyte *warning_string, |
| 853 | 6108 int flags, |
| 6109 struct call_trapping_problems_result *problem, | |
| 6110 lisp_fn_t fun, int nargs, ...) | |
| 6111 { | |
| 6112 va_list vargs; | |
| 6113 Lisp_Object args[20]; | |
| 6114 int i; | |
| 6115 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6116 struct gcpro gcpro1; | |
| 6117 | |
| 6118 assert (nargs >= 0 && nargs < 20); | |
| 6119 | |
| 6120 va_start (vargs, nargs); | |
| 6121 for (i = 0; i < nargs; i++) | |
| 6122 args[i] = va_arg (vargs, Lisp_Object); | |
| 6123 va_end (vargs); | |
| 6124 | |
| 6125 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6126 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6127 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6128 | |
| 6129 GCPRO1_ARRAY (args, nargs); | |
| 6130 RETURN_UNGCPRO | |
| 6131 (call_trapping_problems | |
| 6132 (warning_class, warning_string, flags, problem, | |
| 6133 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6134 } | |
| 6135 | |
| 6136 /* this is an older interface, barely different from | |
| 6137 va_call_trapping_problems. | |
| 6138 | |
| 6139 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6140 va_call_trapping_problems(). */ | |
| 6141 | |
| 6142 Lisp_Object | |
| 6143 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6144 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6145 int nargs, ...) |
| 6146 { | |
| 6147 va_list vargs; | |
| 6148 Lisp_Object args[20]; | |
| 6149 int i; | |
| 6150 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6151 int flags; | |
| 6152 struct gcpro gcpro1; | |
| 6153 | |
| 1204 | 6154 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6155 assert (!NILP (class_)); | |
| 853 | 6156 assert (nargs >= 0 && nargs < 20); |
| 6157 | |
| 6158 va_start (vargs, nargs); | |
| 6159 for (i = 0; i < nargs; i++) | |
| 6160 args[i] = va_arg (vargs, Lisp_Object); | |
| 6161 va_end (vargs); | |
| 6162 | |
| 6163 /* If error-checking is not disabled, just call the function. */ | |
| 6164 | |
| 6165 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6166 { | |
| 6167 Lisp_Object val; | |
| 6168 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6169 return val; | |
| 6170 } | |
| 6171 | |
| 6172 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6173 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6174 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6175 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6176 else | |
| 6177 { | |
| 6178 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6179 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6180 } | |
| 6181 | |
| 6182 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6183 | |
| 6184 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6185 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6186 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6187 | |
| 6188 GCPRO1_ARRAY (args, nargs); | |
| 6189 { | |
| 6190 Lisp_Object its_way_too_goddamn_late = | |
| 6191 call_trapping_problems | |
| 1204 | 6192 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6193 &fazer_invocacao_atrapalhando_problemas); |
| 6194 UNGCPRO; | |
| 6195 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6196 return retval; | |
| 6197 else | |
| 6198 return its_way_too_goddamn_late; | |
| 6199 } | |
| 6200 } | |
| 6201 | |
| 6202 struct calln_trapping_problems | |
| 6203 { | |
| 6204 int nargs; | |
| 6205 Lisp_Object *args; | |
| 6206 }; | |
| 6207 | |
| 6208 static Lisp_Object | |
| 6209 calln_trapping_problems_1 (void *puta) | |
| 6210 { | |
| 6211 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6212 | |
| 6213 return Ffuncall (p->nargs, p->args); | |
| 428 | 6214 } |
| 6215 | |
| 6216 static Lisp_Object | |
| 853 | 6217 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6218 const CIbyte *warning_string, int flags, |
| 853 | 6219 struct call_trapping_problems_result *problem, |
| 6220 int nargs, Lisp_Object *args) | |
| 6221 { | |
| 6222 struct calln_trapping_problems foo; | |
| 6223 struct gcpro gcpro1; | |
| 6224 | |
| 6225 if (SYMBOLP (args[0])) | |
| 6226 { | |
| 6227 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6228 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6229 { | |
| 6230 if (problem) | |
| 6231 { | |
| 6232 problem->caught_error = 0; | |
| 6233 problem->caught_throw = 0; | |
| 6234 problem->error_conditions = Qnil; | |
| 6235 problem->data = Qnil; | |
| 6236 problem->backtrace = Qnil; | |
| 6237 problem->thrown_tag = Qnil; | |
| 6238 problem->thrown_value = Qnil; | |
| 6239 } | |
| 6240 return Qnil; | |
| 6241 } | |
| 6242 } | |
| 6243 | |
| 6244 foo.nargs = nargs; | |
| 6245 foo.args = args; | |
| 6246 | |
| 6247 GCPRO1_ARRAY (args, nargs); | |
| 6248 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6249 flags, problem, | |
| 6250 calln_trapping_problems_1, | |
| 6251 &foo)); | |
| 6252 } | |
| 6253 | |
| 6254 /* #### fix these functions to follow the calling convention of | |
| 6255 call_trapping_problems! */ | |
| 6256 | |
| 6257 Lisp_Object | |
| 867 | 6258 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6259 int flags) |
| 6260 { | |
| 6261 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6262 &function); | |
| 428 | 6263 } |
| 6264 | |
| 6265 Lisp_Object | |
| 867 | 6266 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6267 Lisp_Object object, int flags) |
| 6268 { | |
| 6269 Lisp_Object args[2]; | |
| 6270 | |
| 6271 args[0] = function; | |
| 6272 args[1] = object; | |
| 6273 | |
| 6274 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6275 args); | |
| 6276 } | |
| 6277 | |
| 6278 Lisp_Object | |
| 867 | 6279 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6280 Lisp_Object object1, Lisp_Object object2, |
| 6281 int flags) | |
| 6282 { | |
| 6283 Lisp_Object args[3]; | |
| 6284 | |
| 6285 args[0] = function; | |
| 6286 args[1] = object1; | |
| 6287 args[2] = object2; | |
| 6288 | |
| 6289 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6290 args); | |
| 6291 } | |
| 6292 | |
| 6293 Lisp_Object | |
| 867 | 6294 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6295 Lisp_Object object1, Lisp_Object object2, |
| 6296 Lisp_Object object3, int flags) | |
| 6297 { | |
| 6298 Lisp_Object args[4]; | |
| 6299 | |
| 6300 args[0] = function; | |
| 6301 args[1] = object1; | |
| 6302 args[2] = object2; | |
| 6303 args[3] = object3; | |
| 6304 | |
| 6305 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6306 args); | |
| 6307 } | |
| 6308 | |
| 6309 Lisp_Object | |
| 867 | 6310 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6311 Lisp_Object object1, Lisp_Object object2, |
| 6312 Lisp_Object object3, Lisp_Object object4, | |
| 6313 int flags) | |
| 6314 { | |
| 6315 Lisp_Object args[5]; | |
| 6316 | |
| 6317 args[0] = function; | |
| 6318 args[1] = object1; | |
| 6319 args[2] = object2; | |
| 6320 args[3] = object3; | |
| 6321 args[4] = object4; | |
| 6322 | |
| 6323 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6324 args); | |
| 6325 } | |
| 6326 | |
| 6327 Lisp_Object | |
| 867 | 6328 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6329 Lisp_Object object1, Lisp_Object object2, |
| 6330 Lisp_Object object3, Lisp_Object object4, | |
| 6331 Lisp_Object object5, int flags) | |
| 6332 { | |
| 6333 Lisp_Object args[6]; | |
| 6334 | |
| 6335 args[0] = function; | |
| 6336 args[1] = object1; | |
| 6337 args[2] = object2; | |
| 6338 args[3] = object3; | |
| 6339 args[4] = object4; | |
| 6340 args[5] = object5; | |
| 6341 | |
| 6342 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6343 args); | |
| 6344 } | |
| 6345 | |
| 6346 struct eval_in_buffer_trapping_problems | |
| 6347 { | |
| 6348 struct buffer *buf; | |
| 6349 Lisp_Object form; | |
| 6350 }; | |
| 6351 | |
| 6352 static Lisp_Object | |
| 6353 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6354 { | |
| 6355 struct eval_in_buffer_trapping_problems *p = | |
| 6356 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6357 | |
| 6358 return eval_in_buffer (p->buf, p->form); | |
| 6359 } | |
| 6360 | |
| 6361 /* #### fix these functions to follow the calling convention of | |
| 6362 call_trapping_problems! */ | |
| 6363 | |
| 6364 Lisp_Object | |
| 867 | 6365 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6366 struct buffer *buf, Lisp_Object form, |
| 6367 int flags) | |
| 6368 { | |
| 6369 struct eval_in_buffer_trapping_problems p; | |
| 6370 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6371 struct gcpro gcpro1, gcpro2; |
| 6372 | |
| 853 | 6373 GCPRO2 (buffer, form); |
| 6374 p.buf = buf; | |
| 6375 p.form = form; | |
| 6376 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6377 eval_in_buffer_trapping_problems_1, | |
| 6378 &p)); | |
| 6379 } | |
| 6380 | |
| 6381 Lisp_Object | |
| 1333 | 6382 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6383 Lisp_Object hook_symbol, |
| 6384 int flags) | |
| 6385 { | |
| 1333 | 6386 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6387 RUN_HOOKS_TO_COMPLETION, |
| 6388 flags); | |
| 428 | 6389 } |
| 6390 | |
| 6391 static Lisp_Object | |
| 853 | 6392 safe_run_hook_trapping_problems_1 (void *puta) |
| 6393 { | |
| 5013 | 6394 Lisp_Object hook = GET_LISP_FROM_VOID (puta); |
| 853 | 6395 |
| 6396 run_hook (hook); | |
| 428 | 6397 return Qnil; |
| 6398 } | |
| 6399 | |
| 853 | 6400 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6401 if an error occurs (but not a quit). */ | |
| 6402 | |
| 428 | 6403 Lisp_Object |
| 1333 | 6404 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6405 Lisp_Object hook_symbol, int flags) | |
| 853 | 6406 { |
| 428 | 6407 Lisp_Object tem; |
| 853 | 6408 struct gcpro gcpro1, gcpro2; |
| 6409 struct call_trapping_problems_result prob; | |
| 428 | 6410 |
| 6411 if (!initialized || preparing_for_armageddon) | |
| 6412 return Qnil; | |
| 6413 tem = find_symbol_value (hook_symbol); | |
| 6414 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6415 return Qnil; | |
| 6416 | |
| 853 | 6417 GCPRO2 (hook_symbol, tem); |
| 1333 | 6418 tem = call_trapping_problems (Qerror, NULL, |
| 6419 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6420 &prob, |
| 6421 safe_run_hook_trapping_problems_1, | |
| 5013 | 6422 STORE_LISP_IN_VOID (hook_symbol)); |
| 1333 | 6423 { |
| 6424 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6425 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6426 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6427 | |
| 6428 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6429 Qquit))) | |
| 6430 { | |
| 6431 Fset (hook_symbol, Qnil); | |
| 6432 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6433 } | |
| 6434 else | |
| 6435 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6436 | |
| 6437 | |
| 6438 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6439 &prob); | |
| 6440 } | |
| 6441 | |
| 6442 UNGCPRO; | |
| 6443 return tem; | |
| 853 | 6444 } |
| 6445 | |
| 6446 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6447 { | |
| 6448 struct buffer *buf; | |
| 6449 int nargs; | |
| 6450 Lisp_Object *args; | |
| 6451 enum run_hooks_condition cond; | |
| 6452 }; | |
| 6453 | |
| 6454 static Lisp_Object | |
| 6455 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6456 { | |
| 6457 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6458 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6459 | |
| 6460 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6461 porra->cond); | |
| 6462 } | |
| 6463 | |
| 6464 /* #### fix these functions to follow the calling convention of | |
| 6465 call_trapping_problems! */ | |
| 428 | 6466 |
| 6467 Lisp_Object | |
| 1333 | 6468 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6469 struct buffer *buf, int nargs, |
| 6470 Lisp_Object *args, | |
| 6471 enum run_hooks_condition cond, | |
| 6472 int flags) | |
| 6473 { | |
| 6474 Lisp_Object sym, val, ret; | |
| 6475 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6476 struct gcpro gcpro1; |
| 1333 | 6477 Lisp_Object hook_name; |
| 6478 Ibyte *hook_str; | |
| 6479 Ibyte *err; | |
| 428 | 6480 |
| 6481 if (!initialized || preparing_for_armageddon) | |
| 853 | 6482 /* We need to bail out of here pronto. */ |
| 428 | 6483 return Qnil; |
| 6484 | |
| 853 | 6485 GCPRO1_ARRAY (args, nargs); |
| 6486 | |
| 6487 sym = args[0]; | |
| 6488 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6489 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6490 | |
| 6491 if (UNBOUNDP (val) || NILP (val)) | |
| 6492 RETURN_UNGCPRO (ret); | |
| 6493 | |
| 6494 diversity_and_distrust.buf = buf; | |
| 6495 diversity_and_distrust.nargs = nargs; | |
| 6496 diversity_and_distrust.args = args; | |
| 6497 diversity_and_distrust.cond = cond; | |
| 6498 | |
| 1333 | 6499 hook_name = XSYMBOL_NAME (args[0]); |
| 6500 hook_str = XSTRING_DATA (hook_name); | |
| 6501 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6502 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6503 RETURN_UNGCPRO |
| 6504 (call_trapping_problems | |
| 1333 | 6505 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6506 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6507 &diversity_and_distrust)); | |
| 428 | 6508 } |
| 6509 | |
| 6510 Lisp_Object | |
| 1333 | 6511 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6512 int nargs, |
| 6513 Lisp_Object *args, | |
| 6514 enum run_hooks_condition cond, | |
| 6515 int flags) | |
| 6516 { | |
| 6517 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6518 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6519 } |
| 6520 | |
| 6521 Lisp_Object | |
| 1333 | 6522 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6523 Lisp_Object hook_var, |
| 6524 int nargs, ...) | |
| 6525 { | |
| 6526 /* This function can GC */ | |
| 6527 struct gcpro gcpro1; | |
| 6528 int i; | |
| 6529 va_list vargs; | |
| 6530 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6531 int flags; | |
| 6532 | |
| 6533 va_start (vargs, nargs); | |
| 6534 funcall_args[0] = hook_var; | |
| 6535 for (i = 0; i < nargs; i++) | |
| 6536 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6537 flags = va_arg (vargs, int); | |
| 6538 va_end (vargs); | |
| 6539 | |
| 6540 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6541 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6542 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6543 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6544 } |
| 6545 | |
| 6546 Lisp_Object | |
| 1333 | 6547 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6548 struct buffer *buf, |
| 6549 Lisp_Object hook_var, | |
| 6550 int nargs, ...) | |
| 6551 { | |
| 6552 /* This function can GC */ | |
| 6553 struct gcpro gcpro1; | |
| 6554 int i; | |
| 6555 va_list vargs; | |
| 6556 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6557 int flags; | |
| 6558 | |
| 6559 va_start (vargs, nargs); | |
| 6560 funcall_args[0] = hook_var; | |
| 6561 for (i = 0; i < nargs; i++) | |
| 6562 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6563 flags = va_arg (vargs, int); | |
| 6564 va_end (vargs); | |
| 6565 | |
| 6566 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6567 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6568 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6569 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6570 } |
| 6571 | |
| 6572 | |
| 6573 /************************************************************************/ | |
| 6574 /* The special binding stack */ | |
| 771 | 6575 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6576 /* When performance is critical, use the macros in backtrace.h. */ |
| 6577 /************************************************************************/ | |
| 6578 | |
| 6579 #define min_max_specpdl_size 400 | |
| 6580 | |
| 6581 void | |
| 647 | 6582 grow_specpdl (EMACS_INT reserved) |
| 6583 { | |
| 6584 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6585 if (size_needed >= max_specpdl_size) |
| 6586 { | |
| 6587 if (max_specpdl_size < min_max_specpdl_size) | |
| 6588 max_specpdl_size = min_max_specpdl_size; | |
| 6589 if (size_needed >= max_specpdl_size) | |
| 6590 { | |
| 1951 | 6591 /* Leave room for some specpdl in the debugger. */ |
| 6592 max_specpdl_size = size_needed + 100; | |
| 6593 if (max_specpdl_size > specpdl_size) | |
| 6594 { | |
| 6595 specpdl_size = max_specpdl_size; | |
| 6596 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6597 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6598 } | |
| 563 | 6599 signal_continuable_error |
| 6600 (Qstack_overflow, | |
| 6601 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6602 } |
| 6603 } | |
| 6604 while (specpdl_size < size_needed) | |
| 6605 { | |
| 6606 specpdl_size *= 2; | |
| 6607 if (specpdl_size > max_specpdl_size) | |
| 6608 specpdl_size = max_specpdl_size; | |
| 6609 } | |
| 6610 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6611 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6612 check_specbind_stack_sanity (); |
| 428 | 6613 } |
| 6614 | |
| 6615 | |
| 6616 /* Handle unbinding buffer-local variables */ | |
| 6617 static Lisp_Object | |
| 6618 specbind_unwind_local (Lisp_Object ovalue) | |
| 6619 { | |
| 6620 Lisp_Object current = Fcurrent_buffer (); | |
| 6621 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6622 Lisp_Object victim = ovalue; |
| 6623 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6624 ovalue = XCDR (victim); | |
| 428 | 6625 |
| 6626 free_cons (victim); | |
| 6627 | |
| 6628 if (NILP (buf)) | |
| 6629 { | |
| 6630 /* Deleted buffer -- do nothing */ | |
| 6631 } | |
| 6632 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6633 { | |
| 6634 /* Was buffer-local when binding was made, now no longer is. | |
| 6635 * (kill-local-variable can do this.) | |
| 6636 * Do nothing in this case. | |
| 6637 */ | |
| 6638 } | |
| 6639 else if (EQ (buf, current)) | |
| 6640 Fset (symbol, ovalue); | |
| 6641 else | |
| 6642 { | |
| 6643 /* Urk! Somebody switched buffers */ | |
| 6644 struct gcpro gcpro1; | |
| 6645 GCPRO1 (current); | |
| 6646 Fset_buffer (buf); | |
| 6647 Fset (symbol, ovalue); | |
| 6648 Fset_buffer (current); | |
| 6649 UNGCPRO; | |
| 6650 } | |
| 6651 return symbol; | |
| 6652 } | |
| 6653 | |
| 6654 static Lisp_Object | |
| 6655 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6656 { | |
| 6657 Lisp_Object current = Fcurrent_buffer (); | |
| 6658 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6659 | |
| 6660 buffer = get_buffer (buffer, 0); | |
| 6661 if (NILP (buffer)) | |
| 6662 { | |
| 6663 /* Deleted buffer -- do nothing */ | |
| 6664 } | |
| 6665 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6666 { | |
| 6667 /* Was buffer-local when binding was made, now no longer is. | |
| 6668 * (kill-local-variable can do this.) | |
| 6669 * Do nothing in this case. | |
| 6670 */ | |
| 6671 } | |
| 6672 else if (EQ (buffer, current)) | |
| 6673 Fkill_local_variable (symbol); | |
| 6674 else | |
| 6675 { | |
| 6676 /* Urk! Somebody switched buffers */ | |
| 6677 struct gcpro gcpro1; | |
| 6678 GCPRO1 (current); | |
| 6679 Fset_buffer (buffer); | |
| 6680 Fkill_local_variable (symbol); | |
| 6681 Fset_buffer (current); | |
| 6682 UNGCPRO; | |
| 6683 } | |
| 6684 return symbol; | |
| 6685 } | |
| 6686 | |
| 6687 | |
| 6688 void | |
| 6689 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6690 { | |
| 6691 SPECBIND (symbol, value); | |
| 853 | 6692 |
| 6693 check_specbind_stack_sanity (); | |
| 428 | 6694 } |
| 6695 | |
| 6696 void | |
| 6697 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6698 { | |
| 6699 int buffer_local = | |
| 6700 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6701 | |
| 6702 if (buffer_local == 0) | |
| 6703 { | |
| 6704 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6705 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6706 } |
| 6707 else if (buffer_local > 0) | |
| 6708 { | |
| 6709 /* Already buffer-local */ | |
| 6710 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6711 find_symbol_value (symbol)); | |
| 6712 specpdl_ptr->func = specbind_unwind_local; | |
| 6713 } | |
| 6714 else | |
| 6715 { | |
| 6716 /* About to become buffer-local */ | |
| 6717 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6718 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6719 } | |
| 6720 | |
| 6721 specpdl_ptr->symbol = symbol; | |
| 6722 specpdl_ptr++; | |
| 6723 specpdl_depth_counter++; | |
| 6724 | |
| 6725 Fset (symbol, value); | |
| 853 | 6726 |
| 6727 check_specbind_stack_sanity (); | |
| 428 | 6728 } |
| 6729 | |
| 771 | 6730 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6731 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6732 before your function returns normally, passing in the integer returned | |
| 6733 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6734 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6735 ignored. #### We should eliminate it entirely. */ | |
| 6736 | |
| 6737 int | |
| 428 | 6738 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6739 Lisp_Object arg) | |
| 6740 { | |
| 6741 SPECPDL_RESERVE (1); | |
| 6742 specpdl_ptr->func = function; | |
| 6743 specpdl_ptr->symbol = Qnil; | |
| 6744 specpdl_ptr->old_value = arg; | |
| 6745 specpdl_ptr++; | |
| 6746 specpdl_depth_counter++; | |
| 853 | 6747 check_specbind_stack_sanity (); |
| 771 | 6748 return specpdl_depth_counter - 1; |
| 6749 } | |
| 6750 | |
| 6751 static Lisp_Object | |
| 802 | 6752 restore_lisp_object (Lisp_Object cons) |
| 6753 { | |
| 5013 | 6754 Lisp_Object laddr = XCAR (cons); |
| 6755 Lisp_Object *addr = (Lisp_Object *) GET_VOID_FROM_LISP (laddr); | |
| 802 | 6756 *addr = XCDR (cons); |
| 853 | 6757 free_cons (cons); |
| 802 | 6758 return Qnil; |
| 6759 } | |
| 6760 | |
| 6761 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6762 by ADDR with the value VAL. */ | |
| 814 | 6763 static int |
| 802 | 6764 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6765 Lisp_Object val) | |
| 6766 { | |
| 5013 | 6767 /* We use a cons rather than a malloc()ed structure because we want the |
| 6768 Lisp object to have garbage-collection protection */ | |
| 6769 Lisp_Object laddr = STORE_VOID_IN_LISP (addr); | |
| 802 | 6770 return record_unwind_protect (restore_lisp_object, |
| 5013 | 6771 noseeum_cons (laddr, val)); |
| 802 | 6772 } |
| 6773 | |
| 6774 /* Similar to specbind() but for any C variable whose value is a | |
| 6775 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6776 pointed to by ADDR to its existing value, and then changes its | |
| 6777 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6778 pass this to unbind_to() after you are done. */ | |
| 6779 int | |
| 6780 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6781 { | |
| 6782 int count = specpdl_depth (); | |
| 6783 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6784 *addr = newval; | |
| 6785 return count; | |
| 6786 } | |
| 6787 | |
| 5013 | 6788 struct restore_int |
| 6789 { | |
| 6790 int *addr; | |
| 802 | 6791 int val; |
| 5013 | 6792 }; |
| 6793 | |
| 6794 static Lisp_Object | |
| 6795 restore_int (Lisp_Object obj) | |
| 6796 { | |
| 6797 struct restore_int *ri = (struct restore_int *) GET_VOID_FROM_LISP (obj); | |
| 6798 *(ri->addr) = ri->val; | |
| 6799 xfree (ri); | |
| 802 | 6800 return Qnil; |
| 6801 } | |
| 6802 | |
| 6803 /* Establish an unwind-protect which will restore the int pointed to | |
| 6804 by ADDR with the value VAL. This function works correctly with | |
| 6805 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6806 int |
| 802 | 6807 record_unwind_protect_restoring_int (int *addr, int val) |
| 6808 { | |
| 5013 | 6809 struct restore_int *ri = xnew (struct restore_int); |
| 6810 ri->addr = addr; | |
| 6811 ri->val = val; | |
| 6812 return record_unwind_protect (restore_int, STORE_VOID_IN_LISP (ri)); | |
| 802 | 6813 } |
| 6814 | |
| 6815 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6816 Sets up an unwind-protect to restore the variable pointed to by | |
| 6817 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6818 Returns the previous value of specpdl_depth(); pass this to | |
| 6819 unbind_to() after you are done. This function works correctly with | |
| 6820 all ints, even those that don't fit into a Lisp integer. */ | |
| 6821 int | |
| 6822 internal_bind_int (int *addr, int newval) | |
| 6823 { | |
| 6824 int count = specpdl_depth (); | |
| 6825 record_unwind_protect_restoring_int (addr, *addr); | |
| 6826 *addr = newval; | |
| 6827 return count; | |
| 6828 } | |
| 6829 | |
| 6830 static Lisp_Object | |
| 771 | 6831 free_pointer (Lisp_Object opaque) |
| 6832 { | |
| 5013 | 6833 void *ptr = GET_VOID_FROM_LISP (opaque); |
| 6834 xfree (ptr); | |
| 771 | 6835 return Qnil; |
| 6836 } | |
| 6837 | |
| 6838 /* Establish an unwind-protect which will free the specified block. | |
| 6839 */ | |
| 6840 int | |
| 6841 record_unwind_protect_freeing (void *ptr) | |
| 6842 { | |
| 5013 | 6843 return record_unwind_protect (free_pointer, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6844 } |
| 6845 | |
| 6846 static Lisp_Object | |
| 6847 free_dynarr (Lisp_Object opaque) | |
| 6848 { | |
| 5013 | 6849 Dynarr_free (GET_VOID_FROM_LISP (opaque)); |
| 771 | 6850 return Qnil; |
| 6851 } | |
| 6852 | |
| 6853 int | |
| 6854 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6855 { | |
| 5013 | 6856 return record_unwind_protect (free_dynarr, STORE_VOID_IN_LISP (ptr)); |
| 771 | 6857 } |
| 428 | 6858 |
| 6859 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6860 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6861 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6862 Lisp_Object |
| 771 | 6863 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6864 { |
| 6865 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6866 check_specbind_stack_sanity (); |
| 428 | 6867 return value; |
| 6868 } | |
| 6869 | |
| 6870 /* Don't call this directly. | |
| 6871 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6872 void | |
| 6873 unbind_to_hairy (int count) | |
| 6874 { | |
| 442 | 6875 ++specpdl_ptr; |
| 6876 ++specpdl_depth_counter; | |
| 6877 | |
| 428 | 6878 while (specpdl_depth_counter != count) |
| 6879 { | |
| 1313 | 6880 Lisp_Object oquit = Qunbound; |
| 6881 | |
| 6882 /* Do this check BEFORE decrementing the values below, because once | |
| 6883 they're decremented, GC protection is lost on | |
| 6884 specpdl_ptr->old_value. */ | |
| 1322 | 6885 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6886 { |
| 6887 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6888 existing QUIT until afterwards. Only do this, however, for | |
| 6889 unwind-protects established by Lisp code, not by C code | |
| 6890 (e.g. free_opaque_ptr() or something), because the act of | |
| 6891 checking for QUIT can cause all sorts of weird things to | |
| 6892 happen, since it churns the event loop -- redisplay, running | |
| 6893 Lisp, etc. Code should not have to worry about this just | |
| 6894 because of establishing an unwind-protect. */ | |
| 6895 check_quit (); /* make Vquit_flag accurate */ | |
| 6896 oquit = Vquit_flag; | |
| 6897 Vquit_flag = Qnil; | |
| 6898 } | |
| 6899 | |
| 428 | 6900 --specpdl_ptr; |
| 6901 --specpdl_depth_counter; | |
| 6902 | |
| 1313 | 6903 /* #### At this point, there is no GC protection on old_value. This |
| 6904 could be a real problem, depending on what unwind-protect function | |
| 6905 is called. It looks like it just so happens that the ones | |
| 6906 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6907 we should look into fixing this. (Many unwind-protect functions | |
| 6908 free values. Is it a problem if freed values are | |
| 6909 GC-protected?) */ | |
| 428 | 6910 if (specpdl_ptr->func != 0) |
| 1313 | 6911 { |
| 6912 /* An unwind-protect */ | |
| 6913 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6914 } | |
| 6915 | |
| 428 | 6916 else |
| 6917 { | |
| 6918 /* We checked symbol for validity when we specbound it, | |
| 6919 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6920 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6921 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6922 sym->value = specpdl_ptr->old_value; | |
| 6923 else | |
| 6924 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6925 } | |
| 6926 | |
| 6927 #if 0 /* martin */ | |
| 6928 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6929 /* There should never be anything here for us to remove. | |
| 6930 If so, it indicates a logic error in Emacs. Catches | |
| 6931 should get removed when a throw or signal occurs, or | |
| 6932 when a catch or condition-case exits normally. But | |
| 6933 it's too dangerous to just remove this code. --ben */ | |
| 6934 | |
| 6935 /* Furthermore, this code is not in FSFmacs!!! | |
| 6936 Braino on mly's part? */ | |
| 6937 /* If we're unwound past the pdlcount of a catch frame, | |
| 6938 that catch can't possibly still be valid. */ | |
| 6939 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6940 { | |
| 6941 catchlist = catchlist->next; | |
| 6942 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6943 } | |
| 6944 #endif | |
| 6945 #endif | |
| 1313 | 6946 |
| 6947 if (!UNBOUNDP (oquit)) | |
| 6948 Vquit_flag = oquit; | |
| 428 | 6949 } |
| 853 | 6950 check_specbind_stack_sanity (); |
| 428 | 6951 } |
| 6952 | |
| 6953 | |
| 6954 | |
| 6955 /* Get the value of symbol's global binding, even if that binding is | |
| 6956 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6957 | |
| 6958 Lisp_Object | |
| 6959 top_level_value (Lisp_Object symbol) | |
| 6960 { | |
| 6961 REGISTER struct specbinding *ptr = specpdl; | |
| 6962 | |
| 6963 CHECK_SYMBOL (symbol); | |
| 6964 for (; ptr != specpdl_ptr; ptr++) | |
| 6965 { | |
| 6966 if (EQ (ptr->symbol, symbol)) | |
| 6967 return ptr->old_value; | |
| 6968 } | |
| 6969 return XSYMBOL (symbol)->value; | |
| 6970 } | |
| 6971 | |
| 6972 #if 0 | |
| 6973 | |
| 6974 Lisp_Object | |
| 6975 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6976 { | |
| 6977 REGISTER struct specbinding *ptr = specpdl; | |
| 6978 | |
| 6979 CHECK_SYMBOL (symbol); | |
| 6980 for (; ptr != specpdl_ptr; ptr++) | |
| 6981 { | |
| 6982 if (EQ (ptr->symbol, symbol)) | |
| 6983 { | |
| 6984 ptr->old_value = newval; | |
| 6985 return newval; | |
| 6986 } | |
| 6987 } | |
| 6988 return Fset (symbol, newval); | |
| 6989 } | |
| 6990 | |
| 6991 #endif /* 0 */ | |
| 6992 | |
| 6993 | |
| 6994 /************************************************************************/ | |
| 6995 /* Backtraces */ | |
| 6996 /************************************************************************/ | |
| 6997 | |
| 6998 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 6999 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 7000 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 7001 */ | |
| 7002 (level, flag)) | |
| 7003 { | |
| 7004 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7005 REGISTER int i; | |
| 7006 | |
| 7007 CHECK_INT (level); | |
| 7008 | |
| 7009 for (i = 0; backlist && i < XINT (level); i++) | |
| 7010 { | |
| 7011 backlist = backlist->next; | |
| 7012 } | |
| 7013 | |
| 7014 if (backlist) | |
| 7015 backlist->debug_on_exit = !NILP (flag); | |
| 7016 | |
| 7017 return flag; | |
| 7018 } | |
| 7019 | |
| 7020 static void | |
| 7021 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 7022 { | |
| 7023 int printing_bindings = 0; | |
| 7024 | |
| 7025 for (; speccount > speclimit; speccount--) | |
| 7026 { | |
| 7027 if (specpdl[speccount - 1].func == 0 | |
| 7028 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7029 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7030 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7031 write_ascstring (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7032 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7033 printing_bindings = 1; | |
| 7034 } | |
| 7035 else | |
| 7036 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7037 if (printing_bindings) write_ascstring (stream, ")\n"); |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7038 write_ascstring (stream, " # (unwind-protect ...)\n"); |
| 428 | 7039 printing_bindings = 0; |
| 7040 } | |
| 7041 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7042 if (printing_bindings) write_ascstring (stream, ")\n"); |
| 428 | 7043 } |
| 7044 | |
| 1292 | 7045 static Lisp_Object |
| 7046 backtrace_unevalled_args (Lisp_Object *args) | |
| 7047 { | |
| 7048 if (args) | |
| 7049 return *args; | |
| 7050 else | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7051 return list1 (build_ascstring ("[internal]")); |
| 1292 | 7052 } |
| 7053 | |
| 428 | 7054 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7055 Print a trace of Lisp function calls currently active. | |
| 438 | 7056 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7057 and defaults to the value of `standard-output'. |
| 7058 Optional second arg DETAILED non-nil means show places where currently | |
| 7059 active variable bindings, catches, condition-cases, and | |
| 7060 unwind-protects, as well as function calls, were made. | |
| 428 | 7061 */ |
| 7062 (stream, detailed)) | |
| 7063 { | |
| 7064 /* This function can GC */ | |
| 7065 struct backtrace *backlist = backtrace_list; | |
| 7066 struct catchtag *catches = catchlist; | |
| 7067 int speccount = specpdl_depth(); | |
| 7068 | |
| 7069 int old_nl = print_escape_newlines; | |
| 7070 int old_pr = print_readably; | |
| 7071 Lisp_Object old_level = Vprint_level; | |
| 7072 Lisp_Object oiq = Vinhibit_quit; | |
| 7073 struct gcpro gcpro1, gcpro2; | |
| 7074 | |
| 7075 /* We can't allow quits in here because that could cause the values | |
| 7076 of print_readably and print_escape_newlines to get screwed up. | |
| 7077 Normally we would use a record_unwind_protect but that would | |
| 7078 screw up the functioning of this function. */ | |
| 7079 Vinhibit_quit = Qt; | |
| 7080 | |
| 7081 entering_debugger = 0; | |
| 7082 | |
| 872 | 7083 if (!NILP (detailed)) |
| 7084 Vprint_level = make_int (50); | |
| 7085 else | |
| 7086 Vprint_level = make_int (3); | |
| 428 | 7087 print_readably = 0; |
| 7088 print_escape_newlines = 1; | |
| 7089 | |
| 7090 GCPRO2 (stream, old_level); | |
| 7091 | |
| 1261 | 7092 stream = canonicalize_printcharfun (stream); |
| 428 | 7093 |
| 7094 for (;;) | |
| 7095 { | |
| 7096 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7097 { | |
| 7098 int catchpdl = catches->pdlcount; | |
| 438 | 7099 if (speccount > catchpdl |
| 7100 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7101 /* This is a condition-case catchpoint */ |
| 7102 catchpdl = catchpdl + 1; | |
| 7103 | |
| 7104 backtrace_specials (speccount, catchpdl, stream); | |
| 7105 | |
| 7106 speccount = catches->pdlcount; | |
| 7107 if (catchpdl == speccount) | |
| 7108 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7109 write_ascstring (stream, " # (catch "); |
| 428 | 7110 Fprin1 (catches->tag, stream); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7111 write_ascstring (stream, " ...)\n"); |
| 428 | 7112 } |
| 7113 else | |
| 7114 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7115 write_ascstring (stream, " # (condition-case ... . "); |
| 428 | 7116 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7117 write_ascstring (stream, ")\n"); |
| 428 | 7118 } |
| 7119 catches = catches->next; | |
| 7120 } | |
| 7121 else if (!backlist) | |
| 7122 break; | |
| 7123 else | |
| 7124 { | |
| 7125 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7126 { | |
| 7127 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7128 speccount = backlist->pdlcount; | |
| 7129 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7130 write_ascstring (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7131 if (backlist->nargs == UNEVALLED) |
| 7132 { | |
| 1292 | 7133 Fprin1 (Fcons (*backlist->function, |
| 7134 backtrace_unevalled_args (backlist->args)), | |
| 7135 stream); | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7136 write_ascstring (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7137 } |
| 7138 else | |
| 7139 { | |
| 7140 Lisp_Object tem = *backlist->function; | |
| 7141 Fprin1 (tem, stream); /* This can QUIT */ | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7142 write_ascstring (stream, "("); |
| 428 | 7143 if (backlist->nargs == MANY) |
| 7144 { | |
| 7145 int i; | |
| 7146 Lisp_Object tail = Qnil; | |
| 7147 struct gcpro ngcpro1; | |
| 7148 | |
| 7149 NGCPRO1 (tail); | |
| 7150 for (tail = *backlist->args, i = 0; | |
| 7151 !NILP (tail); | |
| 7152 tail = Fcdr (tail), i++) | |
| 7153 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7154 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7155 Fprin1 (Fcar (tail), stream); |
| 7156 } | |
| 7157 NUNGCPRO; | |
| 7158 } | |
| 7159 else | |
| 7160 { | |
| 7161 int i; | |
| 7162 for (i = 0; i < backlist->nargs; i++) | |
| 7163 { | |
| 826 | 7164 if (!i && EQ (tem, Qbyte_code)) |
| 7165 { | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7166 write_ascstring (stream, "\"...\""); |
| 826 | 7167 continue; |
| 7168 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7169 if (i != 0) write_ascstring (stream, " "); |
| 428 | 7170 Fprin1 (backlist->args[i], stream); |
| 7171 } | |
| 7172 } | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7173 write_ascstring (stream, ")\n"); |
| 428 | 7174 } |
| 7175 backlist = backlist->next; | |
| 7176 } | |
| 7177 } | |
| 7178 Vprint_level = old_level; | |
| 7179 print_readably = old_pr; | |
| 7180 print_escape_newlines = old_nl; | |
| 7181 UNGCPRO; | |
| 7182 Vinhibit_quit = oiq; | |
| 7183 return Qnil; | |
| 7184 } | |
| 7185 | |
| 7186 | |
| 444 | 7187 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7188 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
|
7189 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
|
7190 operator), the value is (nil FUNCTION ARG-FORMS...). |
| 428 | 7191 If that frame has evaluated its arguments and called its function already, |
| 7192 the value is (t FUNCTION ARG-VALUES...). | |
| 7193 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7194 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7195 or a lambda expression for macro calls. | |
| 444 | 7196 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7197 */ |
| 7198 (nframes)) | |
| 7199 { | |
| 7200 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7201 REGISTER int i; | |
| 7202 Lisp_Object tem; | |
| 7203 | |
| 7204 CHECK_NATNUM (nframes); | |
| 7205 | |
| 7206 /* Find the frame requested. */ | |
| 7207 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7208 backlist = backlist->next; | |
| 7209 | |
| 7210 if (!backlist) | |
| 7211 return Qnil; | |
| 7212 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7213 return Fcons (Qnil, Fcons (*backlist->function, |
| 7214 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7215 else |
| 7216 { | |
| 7217 if (backlist->nargs == MANY) | |
| 7218 tem = *backlist->args; | |
| 7219 else | |
| 7220 tem = Flist (backlist->nargs, backlist->args); | |
| 7221 | |
| 7222 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7223 } | |
| 7224 } | |
| 7225 | |
| 7226 | |
| 7227 /************************************************************************/ | |
| 7228 /* Warnings */ | |
| 7229 /************************************************************************/ | |
| 7230 | |
| 1123 | 7231 static int |
| 7232 warning_will_be_discarded (Lisp_Object level) | |
| 7233 { | |
| 7234 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7235 to avoid excessive consing. */ | |
| 7236 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7237 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7238 } | |
| 7239 | |
| 428 | 7240 void |
| 1204 | 7241 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7242 Lisp_Object obj) |
| 7243 { | |
| 1123 | 7244 if (warning_will_be_discarded (level)) |
| 793 | 7245 return; |
| 1123 | 7246 |
| 1204 | 7247 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7248 if (NILP (Vpending_warnings)) |
| 7249 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7250 else | |
| 7251 { | |
| 7252 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7253 Vpending_warnings_tail = obj; | |
| 7254 } | |
| 7255 } | |
| 7256 | |
| 7257 /* #### This should probably accept Lisp objects; but then we have | |
| 7258 to make sure that Feval() isn't called, since it might not be safe. | |
| 7259 | |
| 7260 An alternative approach is to just pass some non-string type of | |
| 7261 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7262 automatically be called when it is safe to do so. */ | |
| 7263 | |
| 7264 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7265 warn_when_safe (Lisp_Object class_, Lisp_Object level, const Ascbyte *fmt, ...) |
| 428 | 7266 { |
| 7267 Lisp_Object obj; | |
| 7268 va_list args; | |
| 7269 | |
| 1123 | 7270 if (warning_will_be_discarded (level)) |
| 793 | 7271 return; |
| 1123 | 7272 |
| 428 | 7273 va_start (args, fmt); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4846
diff
changeset
|
7274 obj = emacs_vsprintf_string (GETTEXT (fmt), args); |
| 428 | 7275 va_end (args); |
| 7276 | |
| 1204 | 7277 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7278 } |
| 7279 | |
| 7280 | |
| 7281 | |
| 7282 | |
| 7283 /************************************************************************/ | |
| 7284 /* Initialization */ | |
| 7285 /************************************************************************/ | |
| 7286 | |
| 7287 void | |
| 7288 syms_of_eval (void) | |
| 7289 { | |
|
5117
3742ea8250b5
Checking in final CVS version of workspace 'ben-lisp-object'
Ben Wing <ben@xemacs.org>
parents:
3025
diff
changeset
|
7290 INIT_LISP_OBJECT (subr); |
|
5118
e0db3c197671
merge up to latest default branch, doesn't compile yet
Ben Wing <ben@xemacs.org>
diff
changeset
|
7291 INIT_LISP_OBJECT (multiple_value); |
| 442 | 7292 |
| 563 | 7293 DEFSYMBOL (Qinhibit_quit); |
| 7294 DEFSYMBOL (Qautoload); | |
| 7295 DEFSYMBOL (Qdebug_on_error); | |
| 7296 DEFSYMBOL (Qstack_trace_on_error); | |
| 7297 DEFSYMBOL (Qdebug_on_signal); | |
| 7298 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7299 DEFSYMBOL (Qdebugger); | |
| 7300 DEFSYMBOL (Qmacro); | |
| 428 | 7301 defsymbol (&Qand_rest, "&rest"); |
| 7302 defsymbol (&Qand_optional, "&optional"); | |
| 7303 /* Note that the process code also uses Qexit */ | |
| 563 | 7304 DEFSYMBOL (Qexit); |
| 7305 DEFSYMBOL (Qsetq); | |
| 7306 DEFSYMBOL (Qinteractive); | |
| 7307 DEFSYMBOL (Qcommandp); | |
| 7308 DEFSYMBOL (Qdefun); | |
| 7309 DEFSYMBOL (Qprogn); | |
| 7310 DEFSYMBOL (Qvalues); | |
| 7311 DEFSYMBOL (Qdisplay_warning); | |
| 7312 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7313 DEFSYMBOL (Qfinalize_list); |
| 563 | 7314 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7315 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7316 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7317 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7318 |
| 7319 DEFSUBR (For); | |
| 7320 DEFSUBR (Fand); | |
| 7321 DEFSUBR (Fif); | |
| 7322 DEFSUBR_MACRO (Fwhen); | |
| 7323 DEFSUBR_MACRO (Funless); | |
| 7324 DEFSUBR (Fcond); | |
| 7325 DEFSUBR (Fprogn); | |
| 7326 DEFSUBR (Fprog1); | |
| 7327 DEFSUBR (Fprog2); | |
| 7328 DEFSUBR (Fsetq); | |
| 7329 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7330 DEFSUBR (Fquote_maybe); |
| 428 | 7331 DEFSUBR (Ffunction); |
| 7332 DEFSUBR (Fdefun); | |
| 7333 DEFSUBR (Fdefmacro); | |
| 7334 DEFSUBR (Fdefvar); | |
| 7335 DEFSUBR (Fdefconst); | |
| 7336 DEFSUBR (Flet); | |
| 7337 DEFSUBR (FletX); | |
| 7338 DEFSUBR (Fwhile); | |
| 7339 DEFSUBR (Fmacroexpand_internal); | |
| 7340 DEFSUBR (Fcatch); | |
| 7341 DEFSUBR (Fthrow); | |
| 7342 DEFSUBR (Funwind_protect); | |
| 7343 DEFSUBR (Fcondition_case); | |
| 7344 DEFSUBR (Fcall_with_condition_handler); | |
| 7345 DEFSUBR (Fsignal); | |
| 7346 DEFSUBR (Finteractive_p); | |
| 7347 DEFSUBR (Fcommandp); | |
| 7348 DEFSUBR (Fcommand_execute); | |
| 7349 DEFSUBR (Fautoload); | |
| 7350 DEFSUBR (Feval); | |
| 7351 DEFSUBR (Fapply); | |
|
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Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7352 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7353 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7354 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7355 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7356 DEFSUBR (Fvalues_list); |
| 428 | 7357 DEFSUBR (Ffuncall); |
| 7358 DEFSUBR (Ffunctionp); | |
| 7359 DEFSUBR (Ffunction_min_args); | |
| 7360 DEFSUBR (Ffunction_max_args); | |
| 7361 DEFSUBR (Frun_hooks); | |
| 7362 DEFSUBR (Frun_hook_with_args); | |
| 7363 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7364 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7365 DEFSUBR (Fbacktrace_debug); | |
| 7366 DEFSUBR (Fbacktrace); | |
| 7367 DEFSUBR (Fbacktrace_frame); | |
| 7368 } | |
| 7369 | |
| 7370 void | |
| 814 | 7371 init_eval_semi_early (void) |
| 428 | 7372 { |
| 7373 specpdl_ptr = specpdl; | |
| 7374 specpdl_depth_counter = 0; | |
| 7375 catchlist = 0; | |
| 7376 Vcondition_handlers = Qnil; | |
| 7377 backtrace_list = 0; | |
| 7378 Vquit_flag = Qnil; | |
| 7379 debug_on_next_call = 0; | |
| 7380 lisp_eval_depth = 0; | |
| 7381 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7382 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7383 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7384 multiple_value_current_limit = 1; |
| 428 | 7385 } |
| 7386 | |
| 7387 void | |
| 7388 reinit_vars_of_eval (void) | |
| 7389 { | |
| 7390 preparing_for_armageddon = 0; | |
| 7391 in_warnings = 0; | |
| 7392 specpdl_size = 50; | |
| 7393 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7394 /* XEmacs change: increase these values. */ | |
| 7395 max_specpdl_size = 3000; | |
| 442 | 7396 max_lisp_eval_depth = 1000; |
| 7397 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7398 throw_level = 0; |
| 7399 #endif | |
| 2367 | 7400 init_eval_semi_early (); |
| 428 | 7401 } |
| 7402 | |
| 7403 void | |
| 7404 vars_of_eval (void) | |
| 7405 { | |
| 7406 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7407 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7408 */ ); | |
| 7409 | |
| 7410 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7411 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7412 This limit is to catch infinite recursions for you before they cause | |
| 7413 actual stack overflow in C, which would be fatal for Emacs. | |
| 7414 You can safely make it considerably larger than its default value, | |
| 7415 if that proves inconveniently small. | |
| 7416 */ ); | |
| 7417 | |
| 7418 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7419 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7420 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7421 Normally, you do not need to set this value yourself. It is set to | |
| 7422 t each time a Control-G is detected, and to `critical' each time a | |
| 7423 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7424 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7425 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7426 it's correct to do so. |
| 428 | 7427 */ ); |
| 7428 Vquit_flag = Qnil; | |
| 7429 | |
| 7430 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7431 Non-nil inhibits C-g quitting from happening immediately. | |
| 7432 Note that `quit-flag' will still be set by typing C-g, | |
| 7433 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7434 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7435 before making `inhibit-quit' nil. |
| 7436 | |
| 7437 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7438 requested by typing control-shift-G in a window-system frame; | |
| 7439 this is explained in more detail in `quit-flag'. | |
| 428 | 7440 */ ); |
| 7441 Vinhibit_quit = Qnil; | |
| 7442 | |
| 7443 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7444 *Non-nil means automatically display a backtrace buffer | |
| 7445 after any error that is not handled by a `condition-case'. | |
| 7446 If the value is a list, an error only means to display a backtrace | |
| 7447 if one of its condition symbols appears in the list. | |
| 7448 See also variable `stack-trace-on-signal'. | |
| 7449 */ ); | |
| 7450 Vstack_trace_on_error = Qnil; | |
| 7451 | |
| 7452 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7453 *Non-nil means automatically display a backtrace buffer | |
| 7454 after any error that is signalled, whether or not it is handled by | |
| 7455 a `condition-case'. | |
| 7456 If the value is a list, an error only means to display a backtrace | |
| 7457 if one of its condition symbols appears in the list. | |
| 7458 See also variable `stack-trace-on-error'. | |
| 7459 */ ); | |
| 7460 Vstack_trace_on_signal = Qnil; | |
| 7461 | |
| 7462 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7463 *List of errors for which the debugger should not be called. | |
| 7464 Each element may be a condition-name or a regexp that matches error messages. | |
| 7465 If any element applies to a given error, that error skips the debugger | |
| 7466 and just returns to top level. | |
| 7467 This overrides the variable `debug-on-error'. | |
| 7468 It does not apply to errors handled by `condition-case'. | |
| 7469 */ ); | |
| 7470 Vdebug_ignored_errors = Qnil; | |
| 7471 | |
| 7472 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7473 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7474 The debugger will not be entered if the error is handled by | |
| 7475 a `condition-case'. | |
| 7476 If the value is a list, an error only means to enter the debugger | |
| 7477 if one of its condition symbols appears in the list. | |
| 7478 This variable is overridden by `debug-ignored-errors'. | |
| 7479 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7480 |
|
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Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7481 Process filters are considered to be outside of condition-case forms |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
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4642
diff
changeset
|
7482 (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
|
7483 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
|
7484 put the expected error\(s) in `debug-ignored-errors'. |
|
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imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7485 |
| 1123 | 7486 If this variable is set while XEmacs is running noninteractively (using |
| 7487 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7488 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7489 obviously won't work), XEmacs will break out to a C debugger using | |
| 7490 \(force-debugging-signal t). This is useful because debugging | |
| 7491 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7492 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7493 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7494 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7495 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7496 is about to die anyway, and if no debugger is present, this will usefully | |
| 7497 dump core.) The most useful way to set this flag when debugging | |
| 7498 noninteractive runs, especially in makefiles, is using the environment | |
| 7499 variable XEMACSDEBUG, like this: | |
| 771 | 7500 |
| 7501 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7502 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7503 */ ); |
| 7504 Vdebug_on_error = Qnil; | |
| 7505 | |
| 7506 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7507 *Non-nil means enter debugger if an error is signalled. | |
| 7508 The debugger will be entered whether or not the error is handled by | |
| 7509 a `condition-case'. | |
| 7510 If the value is a list, an error only means to enter the debugger | |
| 7511 if one of its condition symbols appears in the list. | |
| 7512 See also variable `debug-on-quit'. | |
| 1123 | 7513 |
| 7514 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7515 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7516 */ ); |
| 7517 Vdebug_on_signal = Qnil; | |
| 7518 | |
| 7519 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7520 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7521 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7522 debugger can also be achieved at any time (for X11 console) by typing | |
| 7523 control-shift-G to signal a critical quit. | |
| 7524 */ ); | |
| 7525 debug_on_quit = 0; | |
| 7526 | |
| 7527 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7528 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7529 */ ); | |
| 7530 | |
| 1292 | 7531 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7532 &backtrace_with_internal_sections /* | |
| 7533 Non-nil means backtraces will contain additional information indicating | |
| 7534 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7535 byte-char conversion, internal-external conversion, etc. This can be | |
| 7536 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7537 */ ); | |
| 7538 #ifdef ERROR_CHECK_STRUCTURES | |
| 7539 backtrace_with_internal_sections = 1; | |
| 7540 #else | |
| 7541 backtrace_with_internal_sections = 0; | |
| 7542 #endif | |
| 7543 | |
| 428 | 7544 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7545 Function to call to invoke debugger. | |
| 7546 If due to frame exit, args are `exit' and the value being returned; | |
| 7547 this function's value will be returned instead of that. | |
| 7548 If due to error, args are `error' and a list of the args to `signal'. | |
| 7549 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7550 If due to `eval' entry, one arg, t. | |
| 7551 */ ); | |
| 7552 Vdebugger = Qnil; | |
| 7553 | |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7554 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
|
7555 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
|
7556 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7557 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
|
7558 macros and special operators. |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7559 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7560 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
|
7561 |
| 853 | 7562 staticpro (&Vcatch_everything_tag); |
| 7563 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7564 | |
| 428 | 7565 staticpro (&Vpending_warnings); |
| 7566 Vpending_warnings = Qnil; | |
| 1204 | 7567 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7568 Vpending_warnings_tail = Qnil; |
| 7569 | |
| 793 | 7570 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7571 Vlog_warning_minimum_level = Qinfo; | |
| 7572 | |
| 428 | 7573 staticpro (&Vautoload_queue); |
| 7574 Vautoload_queue = Qnil; | |
| 7575 | |
| 7576 staticpro (&Vcondition_handlers); | |
| 7577 | |
| 853 | 7578 staticpro (&Vdeletable_permanent_display_objects); |
| 7579 Vdeletable_permanent_display_objects = Qnil; | |
| 7580 | |
| 7581 staticpro (&Vmodifiable_buffers); | |
| 7582 Vmodifiable_buffers = Qnil; | |
| 7583 | |
| 7584 inhibit_flags = 0; | |
| 7585 } |